JP4628409B2

JP4628409B2 - Seismic retrofitting method for existing pipe manhole connections

Info

Publication number: JP4628409B2
Application number: JP2007259873A
Authority: JP
Inventors: 雄司今▲崎▼; 巧入出; 三郎小岩
Original assignee: Tokyo Metropolitan Sewerage Service Corp
Current assignee: Tokyo Metropolitan Sewerage Service Corp
Priority date: 2007-02-23
Filing date: 2007-10-03
Publication date: 2011-02-09
Anticipated expiration: 2027-10-03
Also published as: JP2008291631A

Description

本発明は、既設管が人孔を構成している周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を非開削で行う既設管人孔接続部の耐震化工法に関する。 The present invention provides an anti-seismic work for an existing pipe manhole connection portion that performs non-cutting to make the existing pipe manhole connection portion that is fitted and connected to a pipe hole in a peripheral wall constituting the human hole. Regarding the law.

過去に発生した大きな地震において、下水道施設は甚大な被害を被り、市民生活に与えた影響は深刻なものであった。そのなかで既設管が受けた被害をみると、破損、抜け出し、ずれ、ひび割れ等が発生し、とりわけ既設管が人孔のところで該人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部に被害が多くみられた。これは、既設管と人孔との既設管人孔接続部が剛接合となっているために、該既設管人孔接続部が地震動に対する動きの違いを吸収できないことに起因している。 Seismic facilities have been severely damaged by major earthquakes that occurred in the past, and the impact on citizens' lives was serious. Among them, when the damage that the existing pipe has received is seen, breakage, slipping out, slipping, cracking, etc. occur, and the existing pipe is especially fitted and connected to the hole on the peripheral wall of the person hole. A lot of damage was seen in the existing pipe-hole connection. This is due to the fact that the existing pipe human hole connection part between the existing pipe and the human hole is rigidly joined, and therefore the existing pipe human hole connection part cannot absorb the difference in motion with respect to the earthquake motion.

このため、剛接合となっている既設管と人孔との既設管人孔接続部の耐震化が求められるものとなった。剛接合となっている既設管人孔接続部の耐震化を図る工法として、人孔内から管状のカッターで既設管外周囲にある人孔の周壁を一定幅で切除して、既設管と人孔周壁とを縁切りし、切除によって形成された既設管と人孔の周壁との環状空隙内に弾性変形可能な弾性止水材を充填するようにした工法が開示されている。（例えば、特許文献１参照。）。
特開２００１−４０７５１号公報 For this reason, the earthquake resistance of the existing pipe manhole connection part of the existing pipe and manhole which became rigid joining was calculated | required. As a method of making the existing pipe manhole connection part that is rigidly jointed, the peripheral wall of the human hole around the outside of the existing pipe is cut with a certain width from inside the human hole with a tubular cutter, and the existing pipe and human A method has been disclosed in which a peripheral wall of a hole is cut off and an elastic water-stopping material that can be elastically deformed is filled into an annular gap between an existing pipe formed by cutting and the peripheral wall of a human hole. (For example, refer to Patent Document 1).
JP 2001-40751 A

しかしながら、このような既設管人孔接続部の耐震化工法では、カッターによる既設管と人孔周壁との縁切りでは、カッターが人孔の周壁を突き抜けて周壁の外に突出するまで押し進めるので、人孔の周壁の外周壁面における既設管の周囲に環状空隙が大きく開口し、人孔の周壁の外にある土砂や水が前記環状空隙内に流入してしまい、環状空隙内への弾性止水材の充填が困難となり、作業が妨げられるおそれがあった。 However, in the seismic retrofitting method for the existing pipe manhole connection part, the edge cut between the existing pipe and the manhole peripheral wall by the cutter pushes the cutter until it penetrates the manhole peripheral wall and protrudes out of the peripheral wall. An annular gap is largely opened around the existing pipe on the outer peripheral wall surface of the peripheral wall of the hole, and earth and sand or water outside the peripheral wall of the human hole flows into the annular gap, so that the elastic water blocking material into the annular gap It became difficult to fill, and the work could be hindered.

また、前記既設管と人孔周壁との縁切りを確実にするため、カッターを人孔の周壁の外に必要以上に突出させる結果となる。一般に、人孔の周壁の外周囲には、周壁に近接して地下ケーブルや各種流体用埋設管等の埋設物が存在する場合が多い。このため、カッターによる既設管と人孔の周壁との縁切り作業の際、人孔の周壁の外に突出したカッターにより、地下ケーブルや各種流体用埋設管等の埋設物を傷付けてしまうおそれがあるといった問題がある。 Further, in order to ensure the edge cutting between the existing pipe and the peripheral wall of the human hole, the cutter is protruded beyond the peripheral wall of the human hole more than necessary. In general, there are many buried objects such as underground cables and various fluid buried pipes in the vicinity of the peripheral wall of the human hole in the vicinity of the peripheral wall. For this reason, there is a risk of damaging buried objects such as underground cables and various fluid buried pipes due to the cutter protruding outside the peripheral wall of the human hole during the edge cutting operation between the existing pipe and the peripheral wall of the human hole. There is a problem.

本発明の目的は、作業性がよく、人孔の周壁の周囲に周壁に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがなく、また、人孔の強度に影響を与えることなく、耐震化が図れる既設管人孔接続部の耐震化工法を提供することにある。 The object of the present invention is good workability, there is no risk of damaging embedded objects such as underground cables and various fluid embedded pipes around the peripheral wall of the human hole, The object is to provide an earthquake resistant construction method for existing pipe manhole connections that can be earthquake resistant without affecting the strength.

上記の目的を達成するために、請求項１に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除する工程と、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設ける工程と、前記既設管及び前記弾性止水管状部の内部にライニング管を配置する工程を含むことを特徴とする。 In order to achieve the above-described object, the invention according to claim 1 is to provide an existing pipe for improving the earthquake resistance of an existing pipe human hole connecting portion in which the existing pipe is fitted and connected to a pipe hole of a peripheral wall of the human hole. It is an earthquake resistance construction method for a human hole connecting portion, and an end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is connected to an outer periphery of the peripheral wall from an inner peripheral wall surface side of the peripheral wall of the human hole. In the vicinity of the wall surface, cutting at least to a position left 0.5 cm or more from the outer peripheral wall surface , on the inner wall of the portion where the existing tube in the tube hole of the peripheral wall of the human hole is cut, and the thickness of the existing tube The method includes the steps of providing an elastically deformable elastic water-stop tubular portion having substantially the same thickness, and arranging a lining pipe inside the existing pipe and the elastic water-stop tubular portion.

請求項２に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除する工程と、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設ける工程と、前記弾性止水管状部内に鋼管を液密に嵌合する工程と、前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする。 The invention according to claim 2 is an earthquake resistance construction method for an existing pipe human hole connection part that is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The end portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. A step of cutting to a position within a range, and an elastically-dewaterable elastic water stop tube having a thickness substantially equal to the thickness of the existing tube on the inner wall of the portion of the peripheral hole of the human hole where the existing tube is cut Including a step of providing a shape portion, a step of liquid-tightly fitting a steel pipe in the elastic water-stop tubular portion, and a step of arranging a lining pipe inside the existing pipe and the steel pipe.

請求項３に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除する工程と、前記人孔の周壁の前記管孔を通して、前記端部切除後の既設管内に鋼管の端部を嵌合する工程と、前記鋼管と前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部を液密に設ける工程と、前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする。 The invention according to claim 3 is an earthquake resistance construction method for an existing pipe human hole connection part that is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The end portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. A step of cutting to a position within a range, a step of fitting an end portion of a steel pipe into an existing pipe after the end portion is cut through the pipe hole of the peripheral wall of the human hole, and a step of cutting the peripheral wall of the steel pipe and the human hole A step of providing an elastically deformable elastic water-stop tubular portion between an inner wall of a portion of the tube hole where the existing tube is removed, and a step of arranging a lining tube inside the existing tube and the steel tube It is characterized by including.

請求項４に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設ける工程と、前記既設管及び前記弾性止水管状部の内部にライニング管を配置する工程を含むことを特徴とする。 The invention according to claim 4 is an earthquake resistance construction method for an existing pipe human hole connection part which is intended to make the existing pipe human hole connection part seismic resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The end portion of the existing pipe fitted in the tube hole of the peripheral wall of the human hole is at least from the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to the position left 0.5 cm or more, and cutting the inner wall of the hole of the human hole located around the portion to be cut off at the end of the existing pipe in a ring shape along the existing pipe; and A step of providing an elastically deformable elastic water-stop tubular portion concentric with the existing pipe and having an inner diameter substantially the same as the inner diameter of the existing pipe on the inner wall of a portion of the peripheral hole of the human hole where the existing pipe is removed; The lining pipe is disposed inside the existing pipe and the elastic water-stop tubular portion. Characterized in that it comprises a.

請求項５に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設ける工程と、前記弾性止水管状部内に鋼管を液密に嵌合する工程と、前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする。 The invention according to claim 5 is an earthquake resistance construction method for an existing pipe human hole connection part that is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The end portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting the inner wall of the hole of the human hole located around the portion to be cut off at the end of the existing pipe in an annular shape along the existing pipe; A step of providing an elastically deformable elastic water-stop tubular portion concentric with the existing pipe and having an inner diameter substantially the same as the inner diameter of the existing pipe on the inner wall of the portion of the peripheral wall where the existing pipe is removed; and A step of liquid-tightly fitting a steel pipe in the water-stop tubular portion, and a lathe inside the existing pipe and the steel pipe. Characterized in that it comprises a step of placing the training tube.

請求項６に記載の発明は、既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、前記人孔の周壁の前記管孔を通して、前記端部切除後の既設管内に鋼管の端部を嵌合する工程と、前記鋼管と前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部を液密に設ける工程と、前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする。 The invention according to claim 6 is an earthquake resistance construction method for an existing pipe human hole connection part which is intended to make the existing pipe human hole connection part seismically resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole. The end portion of the existing pipe fitted into the tube hole of the peripheral wall of the human hole does not exceed the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting the inner wall of the hole of the human hole located around the portion to be cut off at the end of the existing pipe in an annular shape along the existing pipe; A step of fitting an end portion of a steel pipe into the existing pipe after the end portion is cut through the pipe hole of the peripheral wall; and an inner wall of the steel pipe and a portion of the pipe hole of the peripheral wall of the human hole where the existing pipe is cut off. A step of providing an elastically deformable elastic water stop tubular portion between the existing pipe and the steel pipe. Characterized in that it comprises a step of placing a lining tube.

請求項１に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止できることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 1, an end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is formed inside the peripheral wall of the manhole. The cutter does not project outside the peripheral wall of the human hole because it is cut from the peripheral wall side in the vicinity of the outer peripheral wall surface of the peripheral wall to at least 0.5 cm from the outer peripheral wall surface. The space between the wall surface and the surrounding area of the existing pipe is in a closed state, and earth and sand outside the peripheral wall of the human hole flows into the hole of the peripheral wall of the human hole from between the peripheral wall surface and the periphery of the existing pipe. can be prevented, also result in that you can prevent the inflow of water, work can be easily performed, also underground cable and various fluid buried pipe which is present in proximity to the outer periphery of the peripheral wall of the manhole by a cutter There is no risk of scratching the buried objects.

また、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設け、前記既設管及び前記弾性止水管状部の内部にライニング管を配置するので、ライニング管が既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになり、そして、地震が発生したとき、地震により生じるライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収でき、既設管人孔接続部が地震動で破壊されるのを防止することができる。 Further, an elastically deformable elastic water-stop tubular portion having a thickness substantially equal to the thickness of the existing pipe is provided on an inner wall of a portion of the peripheral wall of the human hole where the existing pipe is cut off, and the existing pipe is provided. Since the lining pipe is disposed inside the elastic water-stop tubular portion, the lining pipe serves as an existing pipe, and the end of the existing pipe is fitted into the pipe hole of the peripheral wall of the human hole. When an earthquake occurs, it is possible to absorb the difference in movement between the existing pipe composed of the lining pipe caused by the earthquake and the peripheral wall of the human hole with the elastic water-stop tubular part, and connect the existing pipe to the human hole The part can be prevented from being destroyed by the earthquake motion.

また、カッターによる切除後の既設管の端部が人孔の周壁の管孔内に嵌合している状態にあったとき、地震による既設管と人孔の周壁との動きの違いにより、管孔内に嵌合している既設管の端部に破壊が生じるが、その破壊は僅かな部分であり、前記のようにライニング管が既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになるので、既設管の端部に破壊があってもライニング管で十分補うことができ、既設管としての機能を損ねるおそれはない。 In addition, when the end of the existing pipe after cutting with the cutter is in a state of being fitted in the pipe hole of the peripheral wall of the human hole, the pipe is due to the difference in movement between the existing pipe and the peripheral wall of the human hole due to the earthquake. Breakage occurs at the end of the existing pipe fitted in the hole, but the breakage is a small part, as described above, the lining pipe serves as the existing pipe, and the end of the existing pipe is a human hole. Since the end of the existing pipe that fits into the hole in the peripheral wall is configured, even if there is a break in the end of the existing pipe, it can be sufficiently compensated with the lining pipe, and the function as the existing pipe is impaired. It is not.

請求項２に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 2, an end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is formed inside the peripheral wall of the human hole. Since the cutter is cut from the peripheral wall side to the position in the vicinity of the outer peripheral wall surface of the peripheral wall so as not to exceed the outer peripheral wall surface, the cutter does not protrude outside the peripheral wall of the human hole. The area around the pipe is closed, and it is possible to prevent the earth and sand outside the peripheral wall of the human hole from flowing into the pipe hole of the peripheral wall of the human hole from between the outer peripheral wall surface and the periphery of the existing pipe. In addition, the inflow of water can be prevented or minimized, and the work can be easily performed. Also, the underground cable and various fluids that exist close to the outer periphery of the peripheral wall of the manhole by the cutter. There is no risk of damaging buried objects such as underground pipes.

また、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設け、前記弾性止水管状部内に鋼管を液密に嵌合し、前記既設管及び前記鋼管の内部にライニング管を配置するので、前記鋼管とライニング管とが既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになるので、既設管人孔接続部の強度を十分保持することができ、そして、地震が発生したとき、地震により生じる前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収でき、既設管人孔接続部が地震動で破壊されるのを防止することができる。 Further, an elastically deformable elastic water-stop tubular portion having a thickness substantially equal to the thickness of the existing pipe is provided on an inner wall of a portion of the peripheral wall of the human hole where the existing pipe is cut off. Since the steel pipe is liquid-tightly fitted in the water tubular portion and the lining pipe is disposed inside the existing pipe and the steel pipe, the steel pipe and the lining pipe serve as existing pipes, and the end portions thereof are human holes. Since the end of the existing pipe that fits into the pipe hole in the peripheral wall of the pipe will be configured, the strength of the existing pipe manhole connection can be maintained sufficiently, and when an earthquake occurs, it will be caused by the earthquake The difference in movement between the existing pipe composed of the steel pipe and the lining pipe and the peripheral wall of the manhole can be absorbed by the elastic water-stop tubular portion, and the existing pipe manhole connecting portion can be prevented from being destroyed by the earthquake motion. .

また、カッターによる切除後の既設管の端部が人孔の周壁の管孔内に嵌合している状態にあったとき、地震による既設管と人孔の周壁との動きの違いにより、管孔内に嵌合している既設管の端部に破壊が生じるが、その破壊は僅かな部分であり、前記のように前記鋼管とライニング管とが既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになるので、既設管の端部に破壊があっても前記鋼管とライニング管で十分補うことができ、既設管としての機能を損ねるおそれはない。 In addition, when the end of the existing pipe after cutting with the cutter is in a state of being fitted in the pipe hole of the peripheral wall of the human hole, the pipe is due to the difference in movement between the existing pipe and the peripheral wall of the human hole due to the earthquake. Breakage occurs at the end of the existing pipe fitted in the hole, but the breakage is a slight part, as described above, the steel pipe and the lining pipe serve as the existing pipe, and the end Will constitute the end of the existing pipe that fits into the hole in the peripheral wall of the human hole, so even if there is a break in the end of the existing pipe, the steel pipe and the lining pipe can be adequately supplemented. There is no risk of impairing the function of the tube.

請求項３に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the seismic improvement method of the existing pipe manhole connecting portion according to claim 3, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is arranged inside the peripheral wall of the manhole. Since the cutter is cut from the peripheral wall side to the position in the vicinity of the outer peripheral wall surface of the peripheral wall so as not to exceed the outer peripheral wall surface, the cutter does not protrude outside the peripheral wall of the human hole. The area around the pipe is closed, and it is possible to prevent the earth and sand outside the peripheral wall of the human hole from flowing into the pipe hole of the peripheral wall of the human hole from between the outer peripheral wall surface and the periphery of the existing pipe. In addition, the inflow of water can be prevented or minimized, and the work can be easily performed. Also, the underground cable and various fluids that exist close to the outer periphery of the peripheral wall of the manhole by the cutter. There is no risk of damaging buried objects such as underground pipes.

また、前記人孔の周壁の前記管孔を通して、前記端部切除後の既設管内に鋼管の端部を嵌合し、前記鋼管と前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部を液密に設けるので、この弾性止水管状部が弾性止水材を型枠に注入することにより現場成形されて設けられる場合、前記鋼管が弾性止水管状部の成形型枠を兼ねるものとなり、弾性止水管状部を成形するための型枠を用意する必要がなくなる。 Further, through the tube hole in the peripheral wall of the human hole, the end portion of the steel pipe is fitted into the existing pipe after the end portion is cut, and the existing pipe in the pipe hole in the peripheral wall of the steel tube and the human hole is cut off. When the elastic water-stopping tubular portion that can be elastically deformed is provided in a liquid-tight manner between the inner wall of the part, this elastic water-stopping tubular portion is provided by being molded in-situ by injecting an elastic water-stopping material into the mold The steel pipe also serves as a mold for forming the elastic water-stop tubular portion, and there is no need to prepare a mold for forming the elastic water-stop tubular portion.

また、前記既設管及び前記鋼管の内部にライニング管を配置するので、前記鋼管とライニング管とが既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成し、しかも鋼管はその端部が既設管内に嵌合しているので一体性が得られることになり、既設管人孔接続部の強度を十分保持することができ、そして、地震が発生したとき、地震により生じる前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収でき、既設管人孔接続部が地震動で破壊されるのを防止することができる。 In addition, since the lining pipe is disposed inside the existing pipe and the steel pipe, the steel pipe and the lining pipe serve as existing pipes, and the end portions of the existing pipes are fitted into the pipe holes of the peripheral wall of the human hole. It constitutes the end of the pipe, and the steel pipe is fitted into the existing pipe so that the integrity can be obtained, the strength of the existing pipe manhole connection can be sufficiently retained, and When an earthquake occurs, the elastic water stop tubular part can absorb the difference in movement between the existing pipe composed of the steel pipe and the lining pipe and the peripheral wall of the manhole, and the existing pipe manhole connection part can be It can be prevented from being destroyed.

請求項４に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止できることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 4, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is formed inside the peripheral wall of the human hole. The human hole tube located near the outer peripheral wall surface of the peripheral wall from the peripheral wall surface to at least 0.5 cm from the outer peripheral wall surface and around the portion to be cut off at the end of the existing pipe Since the inner wall of the tube is cut in an annular shape along the existing pipe, the cutter does not protrude outside the peripheral wall of the human hole, and therefore, the outer wall surface of the peripheral wall of the human hole and the periphery of the existing pipe are closed. in there, it can be prevented from sediment inflow outside of the peripheral wall of the peripheral wall of the tube bore to the manhole of the manhole from between the periphery of the outer peripheral wall surface and the existing pipe, and in particular cut with even prevent inflow of water The work can be easily performed, and the cutter is close to the outer periphery of the peripheral wall of the human hole. There is no risk of damaging the underground cable and various fluid buried objects of buried pipe or the like existing in.

また、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設け、前記既設管及び前記弾性止水管状部の内部にライニング管を配置するので、ライニング管が既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになる。そして、地震が発生したとき、地震により生じるライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収するが、前記既設管とともに前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性止水管状部を設けるので、弾性止水管状部の肉厚が大きく、弾性止水管状部の変形量も大きいことから、ライニング管で構成される既設管と人孔の周壁との動きの違いを効果的に吸収することができ、既設管人孔接続部が地震動で破壊されるのを防止することができる。 Also, an elastically deformable elastic water-stop tubular portion that is concentric with the existing pipe and has an inner diameter substantially the same as the inner diameter of the existing pipe is formed on the inner wall of the portion of the peripheral wall of the human hole where the existing pipe is removed. Since the lining pipe is disposed inside the existing pipe and the elastic water-stop tubular portion, the lining pipe serves as an existing pipe, and an end portion of the lining pipe is fitted into a hole in the peripheral wall of the human hole. It will constitute the end of the tube. And when an earthquake occurs, the elastic water-stop tubular portion absorbs the difference in movement between the existing pipe composed of the lining pipe and the peripheral wall of the human hole caused by the earthquake, but the end of the existing pipe together with the existing pipe The inner wall of the hole of the human hole located around the part to be excised in the inner wall of the part excised annularly along the existing pipe is concentric with the existing pipe and has an inner diameter substantially the same as the inner diameter of the existing pipe Since the elastic water-stop tubular portion is provided, the thickness of the elastic water-stop tubular portion is large and the deformation amount of the elastic water-stop tubular portion is also large, so that the movement between the existing pipe composed of the lining pipe and the peripheral wall of the human hole The difference can be absorbed effectively, and the existing pipe manhole connection can be prevented from being destroyed by the earthquake motion.

請求項５に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 5, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is arranged inside the peripheral wall of the manhole. Cut from the peripheral wall side to the position within the range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall, and the inner wall of the manhole hole located around the portion to be cut off at the end of the existing pipe Since the ring is cut along the existing pipe, the cutter does not protrude outside the peripheral wall of the human hole, and therefore the outer wall surface of the peripheral wall of the human hole and the periphery of the existing pipe are in a closed state, To prevent the earth and sand outside the peripheral wall of the human hole from flowing into the hole of the peripheral wall of the human hole from between the outer peripheral wall surface and the periphery of the existing pipe, and to prevent or minimize the inflow of water. The work can be done easily, and the peripheral wall of the human hole by the cutter There is no risk of damaging the buried objects underground cables and various fluid buried pipe or the like existing in proximity to the outer periphery.

また、前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設け、前記弾性止水管状部内に鋼管を液密に嵌合し、前記既設管及び前記鋼管の内部にライニング管を配置するので、前記鋼管とライニング管とが既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成することになるので、既設管人孔接続部の強度を十分保持することができる。そして、地震が発生したとき、地震により生じる前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収するが、前記既設管とともに前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性止水管状部を設けるので、弾性止水管状部の肉厚が大きく、弾性止水管状部の変形量も大きいことから、前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを効果的に吸収することができ、既設管人孔接続部が地震動で破壊されるのを防止することができる。 Also, an elastically deformable elastic water-stop tubular portion that is concentric with the existing pipe and has an inner diameter substantially the same as the inner diameter of the existing pipe is formed on the inner wall of the portion of the peripheral wall of the human hole where the existing pipe is removed. A steel pipe is liquid-tightly fitted in the elastic water-stop tubular portion, and a lining pipe is disposed inside the existing pipe and the steel pipe, so that the steel pipe and the lining pipe serve as existing pipes, Since the end portion constitutes the end portion of the existing pipe that is fitted into the pipe hole of the peripheral wall of the human hole, the strength of the existing pipe human hole connecting portion can be sufficiently maintained. Then, when an earthquake occurs, the elastic water-stopping tubular portion absorbs the difference in movement between the existing pipe composed of the steel pipe and the lining pipe and the peripheral wall of the human hole caused by the earthquake. The inner wall of the tube hole of the human hole located around the part to be cut off at the end of the pipe is formed on the inner wall of the part cut in an annular shape along the existing pipe, and is concentric with the existing pipe and approximately the inner diameter of the existing pipe. Since the elastic water-stop tubular portion having the same inner diameter is provided, the thickness of the elastic water-stop tubular portion is large and the deformation amount of the elastic water-stop tubular portion is also large. Therefore, it is possible to effectively absorb the difference in movement from the peripheral wall, and to prevent the existing pipe manhole connection portion from being destroyed by the earthquake motion.

請求項６に記載の既設管人孔接続部の耐震化工法によれば、前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除するので、カッターは人孔の周壁の外に突出せず、このため人孔の周壁の外周壁面と既設管の周囲との間は閉じられた状態にあり、外周壁面と既設管の周囲との間から人孔の周壁の管孔内へ人孔の周壁の外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより人孔の周壁の外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistant construction method for an existing pipe manhole connecting portion according to claim 6, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is arranged inside the peripheral wall of the manhole. Cut from the peripheral wall side to the position within the range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall, and the inner wall of the manhole hole located around the portion to be cut off at the end of the existing pipe Since the ring is cut along the existing pipe, the cutter does not protrude outside the peripheral wall of the human hole, and therefore the outer wall surface of the peripheral wall of the human hole and the periphery of the existing pipe are in a closed state, To prevent the earth and sand outside the peripheral wall of the human hole from flowing into the hole of the peripheral wall of the human hole from between the outer peripheral wall surface and the periphery of the existing pipe, and to prevent or minimize the inflow of water. The work can be done easily, and the peripheral wall of the human hole by the cutter There is no risk of damaging the buried objects underground cables and various fluid buried pipe or the like existing in proximity to the outer periphery.

また、前記既設管及び前記鋼管の内部にライニング管を配置するので、前記鋼管とライニング管とが既設管としての役割を果たし、その端部が人孔の周壁の管孔に嵌合される既設管の端部を構成し、しかも鋼管はその端部が既設管内に嵌合しているので一体性が得られることになり、既設管人孔接続部の強度を十分保持することができる。そして、地震が発生したとき、地震により生じる前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを弾性止水管状部で吸収するが、前記既設管とともに前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性止水管状部を設けるので、弾性止水管状部の肉厚が大きく、弾性止水管状部の変形量も大きいことから、前記鋼管とライニング管で構成される既設管と人孔の周壁との動きの違いを効果的に吸収することができ、既設管人孔接続部が地震動で破壊されるのを防止することができる。 In addition, since the lining pipe is disposed inside the existing pipe and the steel pipe, the steel pipe and the lining pipe serve as existing pipes, and the end portions of the existing pipes are fitted into the pipe holes of the peripheral wall of the human hole. The end portion of the pipe is constituted, and the end portion of the steel pipe is fitted into the existing pipe, so that the integrity is obtained, and the strength of the existing pipe manhole connecting portion can be sufficiently maintained. Then, when an earthquake occurs, the elastic water-stopping tubular portion absorbs the difference in movement between the existing pipe composed of the steel pipe and the lining pipe and the peripheral wall of the human hole caused by the earthquake. The inner wall of the tube hole of the human hole located around the part to be cut off at the end of the pipe is formed on the inner wall of the part cut in an annular shape along the existing pipe, and is concentric with the existing pipe and approximately the inner diameter of the existing pipe. Since the elastic water-stop tubular portion having the same inner diameter is provided, the thickness of the elastic water-stop tubular portion is large and the deformation amount of the elastic water-stop tubular portion is also large. Therefore, it is possible to effectively absorb the difference in movement from the peripheral wall, and to prevent the existing pipe manhole connection portion from being destroyed by the earthquake motion.

以下、本発明に係る既設管人孔接続部の耐震化工法を実施するための最良の形態を、図面に示す実施例を参照して詳細に説明する。 Hereinafter, the best mode for carrying out the seismic retrofitting method for an existing pipe manhole connection part according to the present invention will be described in detail with reference to the embodiments shown in the drawings.

図１乃至図９は本発明に係る既設管人孔接続部の耐震化工法を実施する第１例を示すものであり、図１は工事前の状態を示す縦断面図、図２は人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図、図３は人孔の周壁の管孔における既設管の切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図、図４は弾性止水管状部の他例を示す断面図、図５，図６、図７はいずれも弾性止水管状部の他例を示す拡大断面図、図８は既設管及び弾性止水管状部の内部にライニング管を配置した状態を示す縦断面図、図９はライニング管の他例を示す縦断面図である。 FIG. 1 to FIG. 9 show a first example for carrying out the seismic retrofitting method for existing pipe human hole connection portions according to the present invention, FIG. 1 is a longitudinal sectional view showing a state before construction, and FIG. 2 is a human hole. FIG. 3 is a longitudinal sectional view showing a state in which an end portion of an existing pipe fitted into a pipe hole of the peripheral wall is cut off. FIG. 4 is a cross-sectional view showing another example of the elastic water-stop tubular portion, and FIGS. 5, 6, and 7 are enlarged cross-sections showing other examples of the elastic water-stop tubular portion. 8 is a longitudinal sectional view showing a state in which the lining pipe is disposed inside the existing pipe and the elastic water blocking tubular portion, and FIG. 9 is a longitudinal sectional view showing another example of the lining pipe.

図１は本例の工法を実施する人孔（マンホール）の一例を示しており、同図に示すように、工事前の状態では地盤１の中に敷設されている既設管２は、人孔３のところで該人孔３の基礎周壁部４ａの管孔５に差し込まれて接続されて既設管人孔接続部６が形成されている。人孔３は、コンクリートで構築された基礎周壁部４ａの上に、予めコンクリートで成型された成型周壁部４ｂが設置されて周壁４が形成され、上端の開口部７が開閉可能に蓋８で閉塞されている。 FIG. 1 shows an example of a manhole (manhole) for carrying out the construction method of this example. As shown in the figure, the existing pipe 2 laid in the ground 1 in the state before construction is a manhole. 3, an existing pipe human hole connecting portion 6 is formed by being inserted into and connected to the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3. The manhole 3 is formed with a concrete peripheral wall 4b formed in advance on a foundation peripheral wall 4a constructed of concrete to form a peripheral wall 4, and an upper end opening 7 can be opened and closed with a lid 8. It is blocked.

このような構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図２に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除する。 As shown in FIG. 2, first, the seismic improvement method of the present example performed on the existing pipe human hole connecting portion 6 having such a structure is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. The end portion of the existing pipe 2 is cut from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10.

基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍とは、既設管２の端部の切除後に、基礎周壁部４ａの管孔５内に嵌合した状態で残っている既設管２の端部が、地震が発生したとき容易に破壊し、既設管２と人孔３の基礎周壁部４ａとが縁切りできる位置をいう。既設管２の端部の切除後に基礎周壁部４ａの管孔５内に嵌合した状態で残っている既設管２の長さＬは、０〜５ｃｍ位が好ましいが、管孔５内への土砂や水の流入を防止するために、少なくとも０．５ｃｍ以上であることが特に好ましい。既設管２の端部の切除寸法位置Ｐを設定するに際しては、基礎周壁部４ａは現場打ちのため、その壁厚は必ずしも設計通りとはなっていないので、基礎周壁部４ａの壁厚を電磁波を当てて測定し、既設管２の端部の切除寸法位置Ｐを設定することが好ましい。 The vicinity of the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a means that the existing pipe 2 remaining in a state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after the end portion of the existing pipe 2 is excised. This is the position at which the end of can be easily broken when an earthquake occurs and the existing pipe 2 and the basic peripheral wall 4a of the manhole 3 can be edged. The length L of the existing pipe 2 remaining in the state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after excision of the end of the existing pipe 2 is preferably about 0 to 5 cm. In order to prevent inflow of earth and sand or water, it is particularly preferable that the distance is at least 0.5 cm. When setting the resection dimension position P of the end portion of the existing pipe 2, since the wall thickness of the foundation peripheral wall portion 4a is not exactly as designed because the foundation peripheral wall portion 4a is hitting on the site, the wall thickness of the foundation peripheral wall portion 4a is set to the electromagnetic wave. It is preferable to set the resection dimension position P at the end of the existing pipe 2 by applying the measurement.

既設管２の端部の切除に先立ち、既設管２の端部の切除作業に必要な作業空間を確保するために、既設管２の端部前面のインバートコンクリート１１を必要な範囲だけ切除しておく。この既設管２の端部前面のインバートコンクリート１１を切除した範囲は、後に述べるように、既設管２と人孔３の周壁４との動きの違いを吸収する弾性材を充填する空間にもなる。 Prior to cutting off the end of the existing pipe 2, in order to secure a working space necessary for the cutting operation of the end of the existing pipe 2, the invert concrete 11 on the front surface of the end of the existing pipe 2 is cut out to a necessary extent. deep. The range where the invert concrete 11 on the front surface of the end portion of the existing pipe 2 is excised becomes a space filled with an elastic material that absorbs the difference in movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 as described later. .

既設管２の端部の切除にあっては、特に限定されないが、本例では、リング状のカッター（図示せず）で切削して除去する。リング状のカッターは、既設管２の内外径と同じ内外径を有するリング状をなしている。 The cutting of the end of the existing pipe 2 is not particularly limited, but in this example, it is removed by cutting with a ring-shaped cutter (not shown). The ring-shaped cutter has a ring shape having the same inner and outer diameter as that of the existing pipe 2.

また、前記リング状のカッター以外に、例えば、円盤状のカッターを用い、このカッターを既設管２内に挿入して、既設管２の端部の切除寸法位置Ｐで内周側から既設管２を切断し、この切断した既設管２の端部をハツって管孔５から除去するようにしてもよい。 In addition to the ring-shaped cutter, for example, a disk-shaped cutter is used, and this cutter is inserted into the existing pipe 2, and the existing pipe 2 is inserted from the inner peripheral side at the cutting dimension position P at the end of the existing pipe 2. And the end of the cut existing pipe 2 may be removed and removed from the pipe hole 5.

次に、図３に示すように、人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に、前記既設管２の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部１２を設ける。 Next, as shown in FIG. 3, the inner wall of the portion of the tube hole 5 of the basic peripheral wall portion 4 a of the human hole 3 where the existing tube 2 is cut out can be elastically deformed with a thickness substantially equal to the thickness of the existing tube 2. An elastic water-stop tubular portion 12 is provided.

弾性止水管状部１２は、例えばシリコン樹脂、軟性エポキシウレタン等の軟性樹脂や吸水材を含有する水膨張ゴム材等の弾性止水材を用いて成形される。弾性止水管状部１２を人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に設ける手段としては、管孔５の内壁に弾性止水材を既設管２の肉厚とほぼ等しい厚さに管状に貼り付けて弾性止水管状部１２を形成して設けてもよく、或いは弾性止水材で既設管２の肉厚とほぼ等しい厚さの弾性止水管状部１２を成形し、この弾性止水管状部１２を管孔５に挿入して設けてもよく、或いは管孔５内に既設管２の内径と同径の外径を有する内型枠（図示せず）をセットし、この内型枠と管孔５の内壁との間に弾性止水材を注入して弾性止水管状部１２を形成して設けてもよい。 The elastic water-stop tubular portion 12 is molded using an elastic water-stopping material such as a water-expandable rubber material containing a soft resin such as silicon resin or soft epoxy urethane or a water-absorbing material. As a means for providing the elastic water-stop tubular portion 12 on the inner wall of the portion of the basic peripheral wall portion 4 a of the human hole 3 where the existing pipe 2 is cut off, an elastic water-stopping material is provided on the inner wall of the pipe hole 5. The elastic water-stop tubular portion 12 may be formed by being attached to a tube with a thickness substantially equal to the wall thickness, or an elastic water-stop tubular having a thickness substantially equal to the thickness of the existing pipe 2 with an elastic water-stop material. The portion 12 may be molded and the elastic water-stop tubular portion 12 may be provided by being inserted into the tube hole 5, or an inner mold frame having an outer diameter that is the same as the inner diameter of the existing tube 2 (see FIG. (Not shown) may be set, and an elastic water-stopping tubular portion 12 may be formed by injecting an elastic water-stopping material between the inner mold frame and the inner wall of the tube hole 5.

また、弾性止水管状部１２は後述するライニング管の外周面に接着させてもよく、ライニング管の外周面に圧接させてもよい。ライニング管の外周面に圧接させる場合に使用される弾性止水管状部１２としては、ライニング管との間のシール性とスライド性を確保するため、図４に示すように、弾性止水管状部１２の内面を波状に形成することが好ましい。図５、図６、図７はいずれも弾性止水管状部１２の他例を示しており、図５に示す弾性止水管状部１２は、内面が軸方向に環状の凹部１２ａと凸部１２ｂが連続して形成され、凹部１２ａが深く切り込まれた形状となっている。図６に示す弾性止水管状部１２は、内面が軸方向に環状の凹部１２ａと凸部１２ｂが連続して形成された形状となっており、凸部１２ｂが中空となっている。図７に示す弾性止水管状部１２は、内面が軸方向に環状の凹部１２ａと凸部１２ｂが連続して形成された形状となっており、全体が中空となっている。これら図５、図６、図７に示す弾性止水管状部１２は、いずれもライニング管との間のシール性と軸方向の伸縮性に優れ、ライニング管の外周面に接着させてもよく、また圧接させてもよい。いずれにしても、弾性止水管状部１２と管孔５の内壁との間及び弾性止水管状部１２とライニング管の外周面との間が止水されればよい。 Further, the elastic water-stop tubular portion 12 may be adhered to the outer peripheral surface of the lining pipe described later, or may be pressed against the outer peripheral surface of the lining pipe. As the elastic water-stop tubular portion 12 used in press contact with the outer peripheral surface of the lining pipe, as shown in FIG. 4, the elastic water-stop tubular portion is used to ensure sealing performance and slidability with the lining pipe. The inner surface of 12 is preferably formed in a wave shape. 5, 6, and 7 show other examples of the elastic water-stop tubular portion 12. The elastic water-stop tubular portion 12 shown in FIG. 5 has a concave portion 12 a and a convex portion 12 b whose inner surfaces are annular in the axial direction. Are formed continuously, and the recess 12a is deeply cut. The elastic water-stop tubular portion 12 shown in FIG. 6 has a shape in which an inner surface is formed by continuously forming an annular concave portion 12a and a convex portion 12b in the axial direction, and the convex portion 12b is hollow. The elastic water-stop tubular portion 12 shown in FIG. 7 has a shape in which an inner surface is continuously formed with an annular concave portion 12a and a convex portion 12b in the axial direction, and is entirely hollow. These elastic water-stop tubular portions 12 shown in FIG. 5, FIG. 6, and FIG. 7 are all excellent in sealing performance between the lining pipe and the stretchability in the axial direction, and may be adhered to the outer peripheral surface of the lining pipe. Moreover, you may make it press-contact. In any case, it is only necessary to stop water between the elastic water-stop tubular portion 12 and the inner wall of the tube hole 5 and between the elastic water-stop tubular portion 12 and the outer peripheral surface of the lining pipe.

次に、図８に示すように、既設管２及び弾性止水管状部１２の内部に、ライニング管１３を配置する。ライニング管１３にあっては、本例では、硬化可能な軟質状態にある筒状ライニング材１４を既設管２及び弾性止水管状部１２の内部に挿入し、既設管２及び弾性止水管状部１２の内壁に筒状ライニング材１４の周壁面を押し付けて硬化させることによりライニング管１３を形成し配置している。 Next, as shown in FIG. 8, the lining pipe 13 is arranged inside the existing pipe 2 and the elastic water-stop tubular portion 12. In the case of the lining pipe 13, in this example, the tubular lining material 14 in a curable soft state is inserted into the existing pipe 2 and the elastic water-stop tubular portion 12, and the existing pipe 2 and the elastic water-stop tubular portion are inserted. The lining pipe | tube 13 is formed and arrange | positioned by pressing and hardening the surrounding wall surface of the cylindrical lining material 14 to the 12 inner walls.

既設管２及び弾性止水管状部１２の内部に、筒状ライニング材１４を挿入し、既設管２及び弾性止水管状部１２の内壁にライニング管１３を形成し配置する方法にあっては、公知となっている技術が用いられる。 In the method of inserting the tubular lining material 14 into the existing pipe 2 and the elastic water-stop tubular portion 12, and forming and arranging the lining pipe 13 on the inner wall of the existing pipe 2 and the elastic water-stop tubular portion 12, Known techniques are used.

例えば、特公平７−４８５３号公報や特開２００５−９０５８１号公報で開示されている技術を用い、未硬化の硬化性樹脂を含浸または塗布した可撓性がある筒状ライニング材１４を既設管２及び弾性止水管状部１２の内部に挿入し、既設管２及び弾性止水管状部１２の内壁に筒状ライニング材１４の周壁面を押し付けて硬化性樹脂を硬化させることによりライニング管１３を形成し配置することができる。筒状ライニング材１４は、不浸透性内側フィルム層と硬化性樹脂を含浸した樹脂吸収性内層と不浸透性外側フィルム層の３層構造となっている。硬化性樹脂としては、熱硬化性樹脂、光硬化性樹脂或いは常温硬化性樹脂が挙げられ、フェルトに含浸されて樹脂吸収性内層となっている。また、不浸透性内側フィルム層としてはポリウレタンフィルムが使用され、不浸透性外側フィルム層としてはポリエチレンフィルムが使用されるが、これらに限定されるものではない。 For example, a flexible tubular lining material 14 impregnated or coated with an uncured curable resin is used for existing pipes using the techniques disclosed in Japanese Patent Publication No. 7-4853 and Japanese Patent Application Laid-Open No. 2005-90581. 2 and the elastic water-stop tubular portion 12 are inserted into the inner wall of the existing pipe 2 and the elastic water-stop tubular portion 12 to press the peripheral wall surface of the tubular lining material 14 to cure the curable resin. Can be formed and arranged. The cylindrical lining material 14 has a three-layer structure of an impermeable inner film layer, a resin-absorbing inner layer impregnated with a curable resin, and an impermeable outer film layer. Examples of the curable resin include a thermosetting resin, a photocurable resin, and a room temperature curable resin. The resin is impregnated into a resin-absorbing inner layer. Moreover, although a polyurethane film is used as an impermeable inner film layer and a polyethylene film is used as an impermeable outer film layer, it is not limited to these.

また、特開平１０−２７８１１３号公報や特開平６−２９３０７１号公報で開示されている技術を用い、熱可塑性樹脂で成型された硬質乃至半硬質の筒状ライニング材１４を既設管２及び弾性止水管状部１２の内部に挿入し、筒状ライニング材１４を加熱して軟化させ加圧して膨張させることにより既設管２及び弾性止水管状部１２の内壁に押し付け硬化させることによりライニング管１３を形成し配置するようにしてもよい。 Further, by using the technique disclosed in Japanese Patent Laid-Open Nos. 10-278113 and 6-293071, the hard or semi-rigid tubular lining material 14 molded from a thermoplastic resin is replaced with the existing pipe 2 and the elastic stopper. The lining pipe 13 is inserted into the water tubular portion 12, and is heated and softened by pressurizing and expanding the tubular lining material 14 against the inner wall of the existing pipe 2 and the elastic water-stop tubular portion 12. It may be formed and arranged.

既設管２及び弾性止水管状部１１の内部に、筒状ライニング材１４を挿入する場合、２つの人孔３で区切られている既設管２の全長に渡って挿入し、既設管２及び弾性止水管状部１２の内部に、筒状ライニング材１４によるライニング管１３を形成し配置することが好ましい。 When the cylindrical lining material 14 is inserted into the existing pipe 2 and the elastic water-stop tubular portion 11, it is inserted over the entire length of the existing pipe 2 divided by the two human holes 3. It is preferable to form and arrange a lining pipe 13 made of a tubular lining material 14 inside the water-stop tubular portion 12.

また、ライニング管１３の他例として、図９に示すように、例えば、特開平１０−８２４９７号公報で開示されている技術を用い、未硬化の硬化性樹脂を含浸または塗布した可撓性があるシート状ライニング材１４ａを補修機に巻き付け、この補修機を既設管２及び弾性止水管状部１２の内部に挿入して、既設管２及び弾性止水管状部１２に跨るように位置させ、空気圧によりシート状ライニング材１４ａを膨張させてシート状ライニング材１４ａを既設管２及び弾性止水管状部１２の内壁に押し付けて硬化性樹脂を硬化させることによりライニング管１３を形成し配置することができる。 As another example of the lining tube 13, as shown in FIG. 9, for example, the technique disclosed in Japanese Patent Laid-Open No. 10-82497 can be used to impregnate or apply an uncured curable resin. A certain sheet-like lining material 14a is wound around a repair machine, the repair machine is inserted into the existing pipe 2 and the elastic water-stop tubular portion 12, and is positioned so as to straddle the existing pipe 2 and the elastic water-stop tubular portion 12. The lining pipe 13 can be formed and disposed by expanding the sheet-like lining material 14a by air pressure and pressing the sheet-like lining material 14a against the inner wall of the existing pipe 2 and the elastic water-stop tubular portion 12 to cure the curable resin. it can.

また、図示しないが、ライニング管１３を形成し既設管２及び弾性止水管状部１２の内部に配置する他例として、例えば、特公平４−４４１５３号公報や特開２００３−１９１３２９号公報に開示されている、帯状部材を順次円周方向に折り込み、かつ該帯状部材の側端部を互いに接合して螺旋巻きによるライニング管１３を形成しながら、該ライニング管１３を既設管２及び弾性止水管状部１１の内部に送り込んで配置するようにしてもよい。 Although not shown, other examples of forming the lining pipe 13 and disposing it inside the existing pipe 2 and the elastic water-stop tubular portion 12 are disclosed in, for example, Japanese Patent Publication No. 4-44153 and Japanese Patent Application Laid-Open No. 2003-191329. The lining pipe 13 is connected to the existing pipe 2 and the elastic water stop pipe while the band-like members are sequentially folded in the circumferential direction and the side ends of the band-like members are joined together to form a lining pipe 13 by spiral winding. You may make it arrange | position by sending in the inside of the shape part 11. FIG.

この後、既設管２の端部の切除に先立ち切除しておいた既設管２の端部前面のインバートコンクリート１１の切除部に充填材１５を充填する。充填材１５としては、特に限定されるものではないが弾性材が好ましい。本例では、充填材１５として弾性材を使用している。この弾性材として、例えば、弾性止水管状部１２を形成する弾性止水材を使用してもよい。更に、樹脂、モルタル等の充填材１６でライニング管１４とインバートコンクリート１１の段部を埋め均す。このようにして、既設管人孔接続部の耐震化工法の実施の工程が完了する。 Thereafter, the filler 15 is filled into the cut portion of the invert concrete 11 on the front surface of the end portion of the existing pipe 2 that has been cut prior to cutting the end portion of the existing pipe 2. The filler 15 is not particularly limited but is preferably an elastic material. In this example, an elastic material is used as the filler 15. As this elastic material, you may use the elastic water stop material which forms the elastic water stop tubular part 12, for example. Further, the stepped portions of the lining pipe 14 and the inverted concrete 11 are filled with a filler 16 such as resin or mortar. In this way, the process of implementing the seismic retrofitting method for the existing pipe manhole connection is completed.

なお、前記既設管人孔接続部６の耐震化は、図面では、図上左側にある既設管人孔接続部６の耐震化の工程が示されているが、図上右側の既設管人孔接続部６についても、前記と同様の工程で耐震化が実施される。 In the drawing, the seismicization of the existing pipe manhole connection 6 is shown in the drawing as a process of making the existing pipe manhole connection 6 on the left side of the figure, but the existing pipe manhole on the right side of the figure is shown. The connection portion 6 is also made earthquake resistant in the same process as described above.

上記の既設管人孔接続部の耐震化工法によれば、管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するので、カッターは基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外周壁面１０と既設管２の周囲との間は閉じられた状態にあり、外周壁面１０と既設管２の周囲との間から管孔５内へ基礎周壁部４ａの外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより基礎周壁部４ａの外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistance construction method for the existing pipe manhole connection part, the end part of the existing pipe 2 fitted in the pipe hole 5 is located near the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a. Since the cutter is cut to a position within the range not exceeding the outer peripheral wall surface 10, the cutter does not protrude outside the basic peripheral wall portion 4a, and therefore, the space between the outer peripheral wall surface 10 of the basic peripheral wall portion 4a and the periphery of the existing pipe 2 is closed. In this state, it is possible to prevent earth and sand outside the foundation peripheral wall portion 4a from flowing between the outer peripheral wall surface 10 and the periphery of the existing pipe 2 into the pipe hole 5, and to prevent or minimize the inflow of water. The work can be easily performed, and the cutter damages the buried objects such as underground cables and various fluid buried pipes existing in the vicinity of the outer periphery of the foundation peripheral wall 4a. There is no fear.

また、管孔５における既設管２を切除した部分の内壁に、既設管２の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部１２を設け、既設管２及び弾性止水管状部１２の内部にライニング管１３を配置するので、ライニング管１３が既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになり、そして、地震が発生したとき、地震により生じるライニング管１３で構成される既設管２と人孔３の周壁４との動きの違いを弾性止水管状部１２で吸収できる。 Also, an elastically deformable elastic water-stop tubular portion 12 having a thickness substantially equal to the wall thickness of the existing pipe 2 is provided on the inner wall of the tube hole 5 where the existing pipe 2 is cut out, and the existing pipe 2 and the elastic water-stop tubular are provided. Since the lining pipe 13 is disposed inside the portion 12, the lining pipe 13 serves as the existing pipe 2, and its end constitutes the end of the existing pipe 2 fitted into the pipe hole 5. And when an earthquake occurs, the elastic water-stop tubular portion 12 can absorb the difference in movement between the existing pipe 2 constituted by the lining pipe 13 and the peripheral wall 4 of the human hole 3 caused by the earthquake.

即ち、既設管２と人孔３の周壁４との上下方向の動きの違いは、弾性止水管状部１２の肉厚方向の変形により吸収され、また、既設管２と人孔３の周壁４との軸方向の動きの違いは、弾性止水管状部１２とライニング管１３が接着している場合は、弾性止水管状部１２の軸方向の変形により、そして弾性止水管状部１２とライニング管１３が圧接している場合は、弾性止水管状部１２の軸方向の変形とライニング管１３の軸方向のスライドにより吸収される。そして、前記のように、弾性止水管状部１２とライニング管１３が圧接している場合、既設管２と人孔３の周壁４との軸方向の動きの違いはライニング管１３の軸方向のスライドによっても吸収されるので、弾性止水管状部１２の変形率が小さくても既設管２と人孔３の周壁４との軸方向の動きの違いを確実に吸収できる。 That is, the difference in the vertical movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is absorbed by the deformation in the thickness direction of the elastic water-stop tubular portion 12, and the peripheral wall 4 of the existing pipe 2 and the human hole 3. The difference in the axial movement between the elastic water-stop tubular portion 12 and the lining tube 13 is that the elastic water-stop tubular portion 12 and the lining are caused by the axial deformation of the elastic water-stop tubular portion 12. When the pipe 13 is in pressure contact, it is absorbed by the axial deformation of the elastic water blocking tubular portion 12 and the sliding of the lining pipe 13 in the axial direction. As described above, when the elastic water blocking tubular portion 12 and the lining pipe 13 are in pressure contact with each other, the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is the same as the axial direction of the lining pipe 13. Since it is also absorbed by the slide, the difference in axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be reliably absorbed even if the deformation rate of the elastic water-stop tubular portion 12 is small.

弾性止水管状部１２の端面は、その下側略半分がインバートコンクリート１１の切除部に充填した充填材１５により塞がれ、上側略半分だけが開放されることになるが、本例では、充填材１５が弾性材であるので、弾性止水管状部１２の端面の下側略半分は弾性材からなる充填材１５で塞がれることになる。この結果、弾性止水管状部１２の端面の下側略半分の変形は、弾性材からなる充填材１５で吸収されるので、弾性止水管状部１２の端面の下側略半分も開放面と同等となり、弾性止水管状部１２の変形を容易にし、これにより既設管２と人孔３の周壁４との軸方向の動きの違いをより確実に吸収することができる。 The end face of the elastic water-stop tubular portion 12 is closed by the filler 15 filled in the cut portion of the invert concrete 11 at the lower half thereof, and only the upper half is opened, but in this example, Since the filler 15 is an elastic material, the lower half of the end surface of the elastic water-stop tubular portion 12 is closed with the filler 15 made of an elastic material. As a result, the deformation of the lower half of the end face of the elastic water-stop tubular portion 12 is absorbed by the filler 15 made of an elastic material, so that the lower half of the end face of the elastic water-stop tubular portion 12 is also an open surface. It becomes equivalent and facilitates the deformation of the elastic water-stop tubular portion 12, whereby the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be more reliably absorbed.

前記のように本例では、既設管２の端部前面のインバートコンクリート１１の切除部に弾性材からなる充填材１５を充填しているが、充填材１５がモルタルのような硬質材であってもよく、この場合、弾性止水管状部１２の端面は、その下側略半分が硬質材からなる充填材１５により塞がれ、弾性止水管状部１２の変形は弾性止水管状部１２の端面の上側略半分だけの変形で吸収することになる。 As described above, in this example, the cut portion of the inverted concrete 11 on the front surface of the end portion of the existing pipe 2 is filled with the filler 15 made of an elastic material, but the filler 15 is a hard material such as mortar. In this case, the end face of the elastic water-stop tubular portion 12 is closed by the filler 15 made of a hard material at the lower half thereof, and the deformation of the elastic water-stop tubular portion 12 is caused by the deformation of the elastic water-stop tubular portion 12. It is absorbed by the deformation of only the upper half of the end face.

また、カッターによる切除後の既設管２の端部が管孔５内に嵌合している状態にあったとき、地震による既設管２と人孔３の周壁４との動きの違いにより、管孔５内に嵌合している既設管２の端部に破壊が生じるが、その破壊は僅かな部分であり、前記のようにライニング管１３が既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになるので、既設管２の端部に破壊があってもライニング管１３で十分補うことができ、既設管２としての機能を損ねるおそれはない。 Further, when the end of the existing pipe 2 after being cut by the cutter is in a state of being fitted in the pipe hole 5, due to the difference in movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 due to the earthquake, the pipe Although breakage occurs at the end of the existing pipe 2 fitted in the hole 5, the breakage is a slight part, and the lining pipe 13 serves as the existing pipe 2 as described above, and its end Will constitute the end of the existing pipe 2 fitted in the pipe hole 5, so that even if the end of the existing pipe 2 is broken, it can be sufficiently compensated by the lining pipe 13, and the existing pipe 2 There is no risk of loss of function.

図１０乃至図１４は本発明に係る既設管人孔接続部の耐震化工法を実施する第２例を示すものであり、図１０は人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図、図１１は人孔の周壁の管孔における既設管の切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図、図１２は弾性止水管状部内に鋼管を液密に嵌合した状態を示す縦断面図、図１３は弾性止水管状部に嵌合した鋼管の他例を示す断面図、図１４は既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。 FIG. 10 to FIG. 14 show a second example of implementing the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, and FIG. 10 shows the existing pipe fitted in the hole of the peripheral wall of the manhole. FIG. 11 is a longitudinal sectional view showing a state in which an elastic water-stopping tubular portion is provided on the inner wall of a portion of an existing pipe in the peripheral hole of the human hole. Is a longitudinal sectional view showing a state in which the steel pipe is liquid-tightly fitted in the elastic water-stop tubular portion, FIG. 13 is a cross-sectional view showing another example of the steel pipe fitted in the elastic water-stop tubular portion, and FIG. 14 is an existing pipe and a steel pipe It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe | tube inside.

本例の工法を実施する人孔（マンホール）は、第１例を実施する図１に示す人孔と同様であり、同図を援用して説明を省略する。 The manhole for carrying out the construction method of this example is the same as the manhole shown in FIG. 1 for carrying out the first example, and the description is omitted with the aid of this figure.

図１に示す構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図１０に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除する。この工程は、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 As shown in FIG. 10, first, the seismic retrofit method for the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. The end portion of the existing pipe 2 is cut from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10. Since this process is the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

次に、図１１に示すように、人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に、既設管２の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部１２を設ける。この工程も、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 11, the inner wall of the portion of the basic peripheral wall portion 4 a of the human hole 3 where the existing tube 2 is cut out can be elastically deformed with a thickness substantially equal to the thickness of the existing tube 2. An elastic water-stop tubular portion 12 is provided. Since this process is also the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

本例では、後述するように、弾性止水管状部１２内に鋼管を液密に嵌合するが、弾性止水管状部１２を鋼管の外周面に接着させてもよく、または、図４に示すように、弾性止水管状部１２の内面を波状に形成し、鋼管の外周面に圧接させてもよく、また、図５、図６、図７に示すように、弾性止水管状部１２を軸方向に環状の凹部１２ａと凸部１２ｂを連続するように形成し、鋼管の外周面に接着或いは圧接させてもよい。いずれにしても、弾性止水管状部１２と管孔５の内壁との間及び弾性止水管状部１２と鋼管の外周面との間が止水されればよい。 In this example, as described later, the steel pipe is liquid-tightly fitted into the elastic water-stop tubular portion 12, but the elastic water-stop tubular portion 12 may be adhered to the outer peripheral surface of the steel pipe, or FIG. As shown, the inner surface of the elastic water-stop tubular portion 12 may be formed in a wave shape and pressed against the outer peripheral surface of the steel pipe. Also, as shown in FIGS. May be formed such that the annular concave portion 12a and the convex portion 12b are continuous in the axial direction, and bonded or pressed against the outer peripheral surface of the steel pipe. In any case, it is only necessary to stop water between the elastic water-stop tubular portion 12 and the inner wall of the tube hole 5 and between the elastic water-stop tubular portion 12 and the outer peripheral surface of the steel pipe.

次に、図１２に示すように、弾性止水管状部１２内に鋼管１７を液密に嵌合する。この鋼管１７はステンレス製が好ましい。本例では、鋼管１７の外径が既設管２の内径と同径に形成され、弾性止水管状部１２内を通して端部切除後の既設管２内に鋼管の端部を嵌合している。この鋼管１７と弾性止水管状部１２とは、前記したように、接着させてもよく、或いは圧接させてもよい。 Next, as shown in FIG. 12, the steel pipe 17 is liquid-tightly fitted into the elastic water-stop tubular portion 12. The steel pipe 17 is preferably made of stainless steel. In this example, the outer diameter of the steel pipe 17 is formed to be the same as the inner diameter of the existing pipe 2, and the end of the steel pipe is fitted into the existing pipe 2 after end cutting through the elastic water-stop tubular portion 12. . As described above, the steel pipe 17 and the elastic water-stop tubular portion 12 may be bonded or press-contacted.

また、鋼管１７は、これに限られるものではなく、図１３に示すように、鋼管１７の内径が既設管２の内径と同径に形成されたものであってもよい。 Further, the steel pipe 17 is not limited to this, and as shown in FIG. 13, the inner diameter of the steel pipe 17 may be the same as the inner diameter of the existing pipe 2.

次に、図１４に示すように、既設管２及び鋼管１７の内部にライニング管１３を配置する。この工程も、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 14, the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17. Since this process is also the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

上記の既設管人孔接続部の耐震化工法によれば、第１例と同様に、管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するので、カッターは基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外周壁面１０と既設管２の周囲との間は閉じられた状態にあり、外周壁面１０と既設管２の周囲との間から管孔５内へ基礎周壁部４ａの外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより基礎周壁部４ａの外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistance construction method for the existing pipe manhole connection part, the end part of the existing pipe 2 fitted in the pipe hole 5 is connected to the inner peripheral wall surface 9 side of the foundation peripheral wall part 4a as in the first example. To the position within the range that does not exceed the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10, the cutter does not protrude outside the basic peripheral wall portion 4 a, and thus does not protrude outside the basic peripheral wall portion 4 a, The space between the outer peripheral wall surface 10 of the foundation peripheral wall portion 4a and the periphery of the existing pipe 2 is in a closed state, and the space between the outer peripheral wall surface 10 and the periphery of the existing pipe 2 enters the tube hole 5 outside the base peripheral wall portion 4a. Inflow of certain earth and sand can be prevented, inflow of water can be prevented or minimized, work can be easily performed, and the cutter is close to the outer periphery of the base peripheral wall 4a. Damage to underground objects such as underground cables and various underground pipes Ruosore is not.

また、管孔５における既設管２を切除した部分の内壁に、既設管２の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部１２を設け、弾性止水管状部１２内に鋼管１７を液密に嵌合し、既設管２及び鋼管１７の内部にライニング管１３を配置するので、鋼管１７とライニング管１３とが既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになるので、既設管人孔接続部６の強度を十分保持することができ、そして、地震が発生したとき、地震により生じる鋼管１７とライニング管１３で構成される既設管２と人孔３の周壁４との動きの違いを弾性止水管状部１２で吸収できる。 Further, an elastically deformable elastic water-stop tubular portion 12 having a thickness substantially equal to the thickness of the existing tube 2 is provided on the inner wall of the tube hole 5 where the existing tube 2 is cut out. Since the steel pipe 17 is liquid-tightly fitted and the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17, the steel pipe 17 and the lining pipe 13 serve as the existing pipe 2, and its end portion is a pipe hole. Since the end portion of the existing pipe 2 to be fitted to 5 is constituted, the strength of the existing pipe manhole connecting portion 6 can be sufficiently maintained, and when an earthquake occurs, the steel pipe 17 generated by the earthquake is generated. The elastic water-stop tubular portion 12 can absorb the difference in movement between the existing pipe 2 constituted by the lining pipe 13 and the peripheral wall 4 of the human hole 3.

即ち、前記した第１例と同様に、既設管２と人孔３の周壁４との上下方向の動きの違いは、弾性止水管状部１２の肉厚方向の変形により吸収され、また、既設管２と人孔３の周壁４との軸方向の動きの違いは、弾性止水管状部１２とライニング管１３が接着している場合は、弾性止水管状部１２の軸方向の変形により、そして弾性止水管状部１２とライニング管１３が圧接している場合は、弾性止水管状部１２の軸方向の変形とライニング管１３の軸方向のスライドにより吸収される。 That is, as in the first example described above, the difference in the vertical movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is absorbed by the deformation in the thickness direction of the elastic water-stop tubular portion 12, and The difference in axial movement between the pipe 2 and the peripheral wall 4 of the human hole 3 is that when the elastic water-stop tubular portion 12 and the lining pipe 13 are bonded, the elastic water-stop tubular portion 12 is deformed in the axial direction. When the elastic water-stop tubular portion 12 and the lining pipe 13 are in pressure contact, they are absorbed by the axial deformation of the elastic water-stop tubular portion 12 and the axial slide of the lining pipe 13.

また、カッターによる切除後の既設管２の端部が管孔５内に嵌合している状態にあったとき、地震による既設管２と人孔３の周壁４との動きの違いにより、管孔５内に嵌合している既設管２の端部に破壊が生じるが、その破壊は僅かな部分であり、前記のように鋼管１７とライニング管１３が既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになるので、既設管２の端部に破壊があっても鋼管１７とライニング管１３で十分補うことができ、既設管２としての機能を損ねるおそれはない。 Further, when the end of the existing pipe 2 after being cut by the cutter is in a state of being fitted in the pipe hole 5, due to the difference in movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 due to the earthquake, the pipe Although breakage occurs at the end of the existing pipe 2 fitted in the hole 5, the breakage is a slight part, and the steel pipe 17 and the lining pipe 13 serve as the existing pipe 2 as described above. Since the end portion constitutes the end portion of the existing pipe 2 fitted into the tube hole 5, even if the end portion of the existing pipe 2 is broken, the steel pipe 17 and the lining pipe 13 can sufficiently compensate. There is no risk of impairing the function of the existing pipe 2.

図１５乃至図１８は本発明に係る既設管人孔接続部の耐震化工法を実施する第３例を示すものであり、図１５は人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図、図１６は人孔の周壁の管孔を通して端部切除後の既設管内に鋼管の端部を嵌合した状態を示す縦断面図、図１７は鋼管と人孔の周壁の管孔における既設管を切除した部分の内壁との間に弾性止水管状部を液密に設けた状態を示す縦断面図、図１８は既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。 15 to 18 show a third example in which the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention is carried out, and FIG. 15 shows the existing pipe fitted into the hole in the peripheral wall of the manhole. FIG. 16 is a longitudinal sectional view showing a state in which the end portion of the steel pipe is fitted into the existing pipe after the end portion is cut through the hole in the peripheral wall of the human hole, and FIG. FIG. 18 is a longitudinal sectional view showing a state in which an elastic water-stop tubular portion is liquid-tightly provided between the steel pipe and the inner wall of the portion of the peripheral wall of the human hole where the existing pipe is removed. FIG. 18 shows the inside of the existing pipe and the steel pipe. It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe | tube.

図１に示す構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図１５に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除する。この工程は、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 As shown in FIG. 15, first, the seismic retrofit method for the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. The end portion of the existing pipe 2 is cut from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10. Since this process is the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

次に、図１６に示すように、管孔５を通して端部切除後の既設管２内に鋼管１７の端部を嵌合する。この鋼管１７はステンレス製が好ましい。 Next, as shown in FIG. 16, the end portion of the steel pipe 17 is fitted into the existing pipe 2 after the end portion is cut through the tube hole 5. The steel pipe 17 is preferably made of stainless steel.

次に、図１７に示すように、鋼管１７と管孔５における既設管２を切除した部分の内壁との間に弾性止水管状部１２を液密に設ける。 Next, as shown in FIG. 17, an elastic water-stop tubular portion 12 is liquid-tightly provided between the steel tube 17 and the inner wall of the portion of the tube hole 5 where the existing tube 2 is cut off.

弾性止水管状部１２は、第１例と同様に、例えばシリコン樹脂、軟性エポキシウレタン等の軟性樹脂や吸水材を含有する水膨張ゴム材等の弾性止水材を用いて成形される。 Similarly to the first example, the elastic water-stop tubular portion 12 is formed using an elastic water-stop material such as a water-expandable rubber material containing a soft resin such as silicon resin or soft epoxy urethane, or a water-absorbing material.

また、鋼管１７と管孔５における既設管２を切除した部分の内壁との間に弾性止水管状部１２を設ける手段としては、弾性止水材で鋼管１７と管孔５の内壁との幅に応じた肉厚の弾性止水管状部１２を成形し、この弾性止水管状部１２を鋼管１７と管孔５の内壁との間に挿入して設けてもよく、或いは鋼管１７と管孔５の内壁との間に弾性止水材を注入して弾性止水管状部１２を形成して設けてもよい。 In addition, as a means for providing the elastic water-stop tubular portion 12 between the steel pipe 17 and the inner wall of the tube hole 5 where the existing pipe 2 is removed, the width between the steel pipe 17 and the inner wall of the pipe hole 5 is made of an elastic water-proof material. The elastic water-stop tubular portion 12 having a thickness corresponding to the shape may be formed, and the elastic water-stop tubular portion 12 may be inserted between the steel pipe 17 and the inner wall of the pipe hole 5 or the steel pipe 17 and the pipe hole. The elastic water-stopping material 12 may be injected between the inner wall 5 and the elastic water-stop tubular portion 12 to form.

また、弾性止水管状部１２は後述する鋼管１７の外周面に接着させてもよく、または、図４に示すように、弾性止水管状部１２の内面を波状に形成し、鋼管１７の外周面に圧接させてもよい。また、図５、図６、図７に示すように、弾性止水管状部１２を軸方向に環状の凹部１２ａと凸部１２ｂを連続するように形成し、鋼管１７の外周面に接着或いは圧接させてもよい。いずれにしても、弾性止水管状部１２と管孔５の内壁との間及び弾性止水管状部１２と鋼管１７の外周面との間が止水されればよい。 Further, the elastic water-stop tubular portion 12 may be adhered to the outer peripheral surface of the steel pipe 17 described later, or the inner surface of the elastic water-stop tubular portion 12 is formed in a wave shape as shown in FIG. You may press-contact to a surface. As shown in FIGS. 5, 6, and 7, the elastic water-stop tubular portion 12 is formed so that the annular concave portion 12 a and the convex portion 12 b are continuous in the axial direction, and is bonded or pressed to the outer peripheral surface of the steel pipe 17. You may let them. In any case, it is only necessary to stop water between the elastic water-stop tubular portion 12 and the inner wall of the tube hole 5 and between the elastic water-stop tubular portion 12 and the outer peripheral surface of the steel pipe 17.

次に、図１８に示すように、既設管２及び鋼管１７の内部にライニング管１３を配置する。この工程も、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 18, the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17. Since this process is also the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

上記の既設管人孔接続部の耐震化工法によれば、第１例と同様に、管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するので、カッターは基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外周壁面１０と既設管２の周囲との間は閉じられた状態にあり、外周壁面１０と既設管２の周囲との間から管孔５内へ基礎周壁部４ａの外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより基礎周壁部４ａの外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistance construction method for the existing pipe manhole connection part, the end part of the existing pipe 2 fitted in the pipe hole 5 is connected to the inner peripheral wall surface 9 side of the foundation peripheral wall part 4a as in the first example. To the position within the range that does not exceed the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10, the cutter does not protrude outside the basic peripheral wall portion 4 a, and for this reason, the outer peripheral wall surface 10 of the basic peripheral wall portion 4 a and the existing pipe 2 It is in a closed state between the surroundings and can prevent the earth and sand outside the foundation peripheral wall portion 4a from flowing into the tube hole 5 from between the outer peripheral wall surface 10 and the surrounding of the existing pipe 2. Inflow can be prevented or minimized, work can be performed easily, and underground cables and buried pipes for various fluids, etc. that exist in the vicinity of the outer periphery of the basic peripheral wall 4a by a cutter. There is no risk of scratching the buried objects.

また、管孔５を通して、端部切除後の既設管２内に鋼管１７の端部を嵌合し、鋼管１７と管孔５における既設管２を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部１２を液密に設けるので、この弾性止水管状部１２が弾性止水材を型枠に注入することにより現場成形されて設けられる場合、鋼管１７が弾性止水管状部１２の成形型枠を兼ねるものとなり、弾性止水管状部１２を成形するための型枠を用意する必要がなくなる。 Further, the end of the steel pipe 17 is fitted into the existing pipe 2 after the end portion is cut through the pipe hole 5, and elastic deformation is caused between the steel pipe 17 and the inner wall of the portion of the pipe hole 5 where the existing pipe 2 is cut off. Since the possible elastic water-stop tubular portion 12 is provided in a liquid-tight manner, when the elastic water-stop tubular portion 12 is provided by being molded in situ by injecting an elastic water-proof material into the mold, the steel pipe 17 is provided with an elastic water-stop tubular portion. This also serves as a forming mold for the portion 12, and it is not necessary to prepare a mold for forming the elastic water-stop tubular portion 12.

また、既設管２及び鋼管１７の内部にライニング管１３を配置するので、鋼管１７とライニング管１３とが既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成し、しかも鋼管１７はその端部が既設管２内に嵌合しているので一体性が得られることになり、既設管人孔接続部６の強度を十分保持することができ、そして、地震が発生したとき、地震により生じる鋼管１７とライニング管１３で構成される既設管２と人孔３の周壁４との動きの違いを弾性止水管状部１２で吸収できる。 Further, since the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17, the steel pipe 17 and the lining pipe 13 serve as the existing pipe 2, and an existing pipe whose end is fitted into the pipe hole 5 is used. 2 and the end of the steel pipe 17 is fitted in the existing pipe 2, so that the integrity is obtained and the strength of the existing pipe manhole connection 6 is sufficiently maintained. Then, when an earthquake occurs, the elastic water-stop tubular portion 12 can absorb the difference in movement between the existing pipe 2 constituted by the steel pipe 17 and the lining pipe 13 and the peripheral wall 4 of the manhole 3 caused by the earthquake.

前記のように本例では、既設管２の端部前面のインバートコンクリート１１の切除部に弾性材からなる充填材１５を充填しているが、充填材１５がモルタルのような硬質材であってもよく、この場合、弾性止水管状部１２の端面は、その下側略半分が硬質材からなる充填材１５により塞がれ、弾性止水管状部１２の変形は弾性止水管状部１２の端面の上側略半分だけの変形で吸収することになる。 As described above, in this example, the cut portion of the inverted concrete 11 on the front surface of the end portion of the existing pipe 2 is filled with the filler 15 made of an elastic material, but the filler 15 is a hard material such as mortar. In this case, the end face of the elastic water-stop tubular portion 12 is closed by the filler 15 made of a hard material at the lower half thereof, and the deformation of the elastic water-stop tubular portion 12 is caused by the deformation of the elastic water-stop tubular portion 12. It absorbs by deformation of only the upper half of the end face.

図１９乃至図２１は本発明に係る既設管人孔接続部の耐震化工法を実施する第４例を示すものであり、図１９は人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図、図２０は人孔の周壁の管孔における既設管を切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図、図２１は既設管及び弾性止水管状部の内部にライニング管を配置した状態を示す縦断面図である。 FIGS. 19 to 21 show a fourth example in which the seismic retrofitting method for an existing pipe manhole connection portion according to the present invention is carried out, and FIG. 19 shows an existing pipe fitted in a hole in a peripheral wall of the manhole. FIG. 20 is a longitudinal sectional view showing a state in which the inner wall of the human hole located around the portion to be cut off at the end of the existing pipe is cut in an annular shape along the existing pipe. The longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part in the inner wall of the part which excised the existing pipe in the pipe hole of the surrounding wall of a hole, FIG. 21 has arrange | positioned the lining pipe inside the existing pipe and the elastic water stop tubular part It is a longitudinal cross-sectional view which shows a state.

図１に示す構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図１９に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するとともに、既設管２の端部における切除する部分の周囲に位置する人孔３の管孔５の内壁を、既設管２に沿って環状に切除する。管孔５の内壁の切除幅は特に限定されない。また、管孔５の内壁を環状に切除した後の管孔５の形状にあっては、既設管２と同心でなくてもよく、また真円でなくてもよい。また、既設管２の端部の切除と管孔５の内壁の切除は、同時に切除してもよく、或いは何れか一方を先に切除し、その後に他方を切除するようにしてもよい。 As shown in FIG. 19, first, the seismic retrofit method for the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. The end portion of the existing pipe 2 is excised from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position in the vicinity of the outer peripheral wall surface 10 and not exceeding the outer peripheral wall surface 10, and at the end of the existing pipe 2 The inner wall of the tube hole 5 of the human hole 3 located around the portion to be cut is circularly cut along the existing tube 2. The excision width of the inner wall of the tube hole 5 is not particularly limited. Further, the shape of the tube hole 5 after the inner wall of the tube hole 5 is cut out in an annular shape may not be concentric with the existing tube 2 or may not be a perfect circle. Further, the cutting of the end of the existing pipe 2 and the cutting of the inner wall of the tube hole 5 may be performed simultaneously, or one of them may be cut first, and then the other may be cut.

基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍とは、前記した第１例と同様に、既設管２の端部の切除後に、基礎周壁部４ａの管孔５内に嵌合した状態で残っている既設管２の端部が、地震が発生したとき容易に破壊し、既設管２と人孔３の基礎周壁部４ａとが縁切りできる位置をいう。既設管２の端部の切除後に基礎周壁部４ａの管孔５内に嵌合した状態で残っている既設管２の長さＬは、０〜５ｃｍ位が好ましいが、管孔５内への土砂や水の流入を防止するために、少なくとも０．５ｃｍ以上であることが特に好ましい。既設管２の端部の切除寸法位置Ｐを設定するに際しては、基礎周壁部４ａは現場打ちのため、その壁厚は必ずしも設計通りとはなっていないので、基礎周壁部４ａの壁厚を電磁波を当てて測定し、既設管２の端部の切除寸法位置Ｐを設定することが好ましい。 The vicinity of the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a is fitted into the tube hole 5 of the basic peripheral wall portion 4a after the end portion of the existing pipe 2 is excised, as in the first example described above. The end of the existing pipe 2 remaining in the state of being broken is a position where the existing pipe 2 and the basic peripheral wall portion 4a of the human hole 3 can be cut off easily when an earthquake occurs. The length L of the existing pipe 2 remaining in the state of being fitted in the tube hole 5 of the basic peripheral wall portion 4a after excision of the end of the existing pipe 2 is preferably about 0 to 5 cm. In order to prevent inflow of earth and sand or water, it is particularly preferable that the distance is at least 0.5 cm. When setting the resection dimension position P of the end portion of the existing pipe 2, since the wall thickness of the foundation peripheral wall portion 4a is not exactly as designed because the foundation peripheral wall portion 4a is hitting on the site, the wall thickness of the foundation peripheral wall portion 4a is set to the electromagnetic wave. It is preferable to set the resection dimension position P at the end of the existing pipe 2 by applying the measurement.

また、第１例と同様に、既設管２の端部の切除及び管孔５の内壁の切除に先立ち、既設管２の端部の切除及び管孔５の内壁の切除作業に必要な作業空間を確保するために、既設管２の端部前面のインバートコンクリート１１を必要な範囲だけ切除しておく。この既設管２の端部前面のインバートコンクリート１１を切除した範囲は、既設管２と人孔３の周壁４との動きの違いを吸収する弾性材を充填する空間にもなる。 Similarly to the first example, prior to excision of the end of the existing pipe 2 and excision of the inner wall of the tube hole 5, a work space necessary for excising the end of the existing pipe 2 and excising the inner wall of the tube hole 5. In order to ensure this, the invert concrete 11 on the front surface of the end of the existing pipe 2 is cut out only in a necessary range. The range in which the inverted concrete 11 on the front surface of the end of the existing pipe 2 is cut also becomes a space filled with an elastic material that absorbs the difference in movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3.

既設管２の端部及び管孔５の内壁の切除にあっては、特に限定されないが、本例では、リング状のカッター（図示せず）で切削して除去する。リング状のカッターは、その内径が既設管２の内径と同じ径で、外径が既設管２の外径よりも大径となっており、既設管２の外径よりも大きくなっている分が管孔５の内壁の切除幅となる。 The cutting of the end of the existing pipe 2 and the inner wall of the pipe hole 5 is not particularly limited, but in this example, it is removed by cutting with a ring-shaped cutter (not shown). The ring-shaped cutter has an inner diameter that is the same as the inner diameter of the existing pipe 2, an outer diameter that is larger than the outer diameter of the existing pipe 2, and is larger than the outer diameter of the existing pipe 2. Becomes the excision width of the inner wall of the tube hole 5.

次に、図２０に示すように、人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に、既設管２と同心で且つ既設管２の内径と概ね同じ内径の弾性変形可能な弾性止水管状部１２を設ける。 Next, as shown in FIG. 20, the inner wall of the portion of the basic peripheral wall portion 4 a of the human hole 3 where the existing tube 2 is removed is concentric with the existing tube 2 and substantially the same inner diameter as the existing tube 2. The elastic water-stop tubular portion 12 is provided.

弾性止水管状部１２は、第１例と同様に、例えばシリコン樹脂、軟性エポキシウレタン等の軟性樹脂や吸水材を含有する水膨張ゴム材等の弾性止水材を用いて成形される。弾性止水管状部１２を人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に設ける手段としては、管孔５の内壁に弾性止水材を既設管２の内径と概ね一致し且つ概ね同一内周面を構成するように管状に貼り付けて弾性止水管状部１２を形成して設けてもよく、或いは弾性止水材で既設管２の内径と概ね一致し且つ概ね同一内周面を構成し外径を管孔５の内径と概ね一致させた弾性止水管状部１２を成形し、この弾性止水管状部１２を管孔５に挿入して設けてもよく、或いは管孔５内に既設管２の内径と同径の外径を有する内型枠（図示せず）をセットし、この内型枠と管孔５の内壁との間に弾性止水材を注入して弾性止水管状部１２を形成して設けてもよい。 Similarly to the first example, the elastic water-stop tubular portion 12 is formed using an elastic water-stop material such as a water-expandable rubber material containing a soft resin such as silicon resin or soft epoxy urethane, or a water-absorbing material. As a means for providing the elastic water-stop tubular portion 12 on the inner wall of the portion of the basic peripheral wall portion 4 a of the human hole 3 where the existing pipe 2 is cut off, an elastic water-stopping material is provided on the inner wall of the pipe hole 5. The elastic water-stop tubular portion 12 may be formed by being attached to a tube so as to substantially coincide with the inner diameter and form the same inner peripheral surface, or may be provided with an elastic water-stop material and approximately the same as the inner diameter of the existing pipe 2. In addition, an elastic water-stop tubular portion 12 having substantially the same inner peripheral surface and having an outer diameter substantially equal to the inner diameter of the tube hole 5 is formed, and the elastic water-stop tubular portion 12 is inserted into the tube hole 5 and provided. Alternatively, an inner mold frame (not shown) having the same outer diameter as the inner diameter of the existing pipe 2 is set in the tube hole 5, and an elastic stopper is provided between the inner mold frame and the inner wall of the tube hole 5. An elastic water-stop tubular portion 12 may be formed by injecting a water material.

また、弾性止水管状部１２は後述するライニング管の外周面に接着させてもよく、または、図４に示すように、弾性止水管状部１２の内面を波状に形成し、ライニング管の外周面に圧接させてもよい。また、また、図５、図６、図７に示すように、弾性止水管状部１２を軸方向に環状の凹部１２ａと凸部１２ｂを連続するように形成し、ライニング管の外周面に接着或いは圧接させてもよい。いずれにしても、弾性止水管状部１２と管孔５の内壁との間及び弾性止水管状部１２とライニング管の外周面との間が止水されればよい。 Further, the elastic water-stop tubular portion 12 may be adhered to the outer peripheral surface of the lining tube described later, or as shown in FIG. You may press-contact to a surface. In addition, as shown in FIGS. 5, 6, and 7, the elastic water-stop tubular portion 12 is formed so that the annular concave portion 12a and the convex portion 12b are continuous in the axial direction and bonded to the outer peripheral surface of the lining pipe. Or you may make it press-contact. In any case, it is only necessary to stop water between the elastic water-stop tubular portion 12 and the inner wall of the tube hole 5 and between the elastic water-stop tubular portion 12 and the outer peripheral surface of the lining pipe.

次に、図２１に示すように、既設管２及び弾性止水管状部１２の内部にライニング管１３を配置する。この工程は、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 21, the lining pipe 13 is disposed inside the existing pipe 2 and the elastic water blocking tubular portion 12. Since this process is the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

上記の既設管人孔接続部の耐震化工法によれば、管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するとともに、既設管２の端部における切除する部分の周囲に位置する管孔５の内壁を既設管２に沿って環状に切除するので、カッターは基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外周壁面１０と既設管２の周囲との間は閉じられた状態にあり、外周壁面１０と既設管２の周囲との間から管孔５内へ基礎周壁部４ａの外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより基礎周壁部４ａの外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistance construction method for the existing pipe manhole connection part, the end part of the existing pipe 2 fitted in the pipe hole 5 is located near the outer peripheral wall surface 10 from the inner peripheral wall surface 9 side of the basic peripheral wall portion 4a. The cutter is cut to a position within the range not exceeding the outer peripheral wall surface 10 and the inner wall of the tube hole 5 located around the portion to be cut off at the end of the existing pipe 2 is cut in an annular shape along the existing pipe 2. It does not protrude outside the base peripheral wall portion 4a, and therefore, the space between the outer peripheral wall surface 10 of the base peripheral wall portion 4a and the periphery of the existing pipe 2 is closed, and between the outer peripheral wall surface 10 and the periphery of the existing pipe 2 Can prevent the earth and sand outside the foundation peripheral wall portion 4a from flowing into the pipe hole 5, and can also prevent or minimize the inflow of water, so that the work can be easily performed, Moreover, it exists close to the outer periphery of the basic peripheral wall 4a by the cutter. There is no risk of damaging the underground cable and various fluid buried objects of buried pipes and the like.

また、管孔５における既設管２を切除した部分の内壁に、既設管２と同心で且つ既設管２の内径と概ね同じ内径の弾性変形可能な弾性止水管状部１２を設け、既設管２及び弾性止水管状部１２の内部にライニング管１３を配置するので、ライニング管１３が既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになり、そして、地震が発生したとき、地震により生じるライニング管１３で構成される既設管２と人孔３の周壁４との動きの違いを弾性止水管状部１２で吸収できる。 In addition, an elastically deformable elastic water-stop tubular portion 12 that is concentric with the existing tube 2 and has an inner diameter substantially the same as the inner diameter of the existing tube 2 is provided on the inner wall of the tube hole 5 where the existing tube 2 is removed. Since the lining pipe 13 is disposed inside the elastic water-stop tubular portion 12, the lining pipe 13 serves as the existing pipe 2, and the end portion of the existing pipe 2 fitted into the pipe hole 5 is used as an end portion thereof. When an earthquake occurs, the elastic water-stop tubular portion 12 can absorb the difference in movement between the existing pipe 2 constituted by the lining pipe 13 and the peripheral wall 4 of the manhole 3 caused by the earthquake.

さらに、本例では弾性止水管状部１２が既設管２とともに既設管２の端部における切除する部分の周囲に位置する管孔５の内壁を既設管２に沿って環状に切除した部分の内壁に、既設管２と同心で且つ既設管の内径と概ね同じ内径に設けられているので、弾性止水管状部１２の肉厚が大きく、弾性止水管状部１２の変形量も大きいことから、ライニング管で構成される既設管と人孔の周壁との動きの違いを効果的に吸収することができる。 Further, in this example, the inner wall of the portion where the inner wall of the tube hole 5 located around the portion to be cut off at the end of the existing tube 2 together with the existing tube 2 is cut in an annular shape along the existing tube 2. In addition, since it is provided concentrically with the existing pipe 2 and approximately the same inner diameter as the existing pipe, the thickness of the elastic water-stop tubular portion 12 is large, and the amount of deformation of the elastic water-stop tubular portion 12 is also large. It is possible to effectively absorb the difference in movement between the existing pipe composed of the lining pipe and the peripheral wall of the human hole.

また、弾性止水管状部１２の端面は、その下側略半分がインバートコンクリート１１の切除部に充填した充填材１５により塞がれ、上側略半分だけが開放されることになるが、本例では、充填材１５が弾性材であるので、弾性止水管状部１２の端面の下側略半分は弾性材からなる充填材１５で塞がれることになる。この結果、弾性止水管状部１２の端面の下側略半分の変形は、弾性材からなる充填材１５で吸収されるので、弾性止水管状部１２の端面の下側略半分も開放面と同等となり、弾性止水管状部１２の変形を容易にし、これにより既設管２と人孔３の周壁４との軸方向の動きの違いをより確実に吸収することができる。 Further, the end face of the elastic water-stop tubular portion 12 is closed by the filler 15 filled in the cut portion of the invert concrete 11 at the lower half thereof, and only the upper half is opened. Then, since the filler 15 is an elastic material, the lower half of the end surface of the elastic water-stop tubular portion 12 is closed with the filler 15 made of an elastic material. As a result, the deformation of the lower half of the end face of the elastic water-stop tubular portion 12 is absorbed by the filler 15 made of an elastic material, so that the lower half of the end face of the elastic water-stop tubular portion 12 is also an open surface. It becomes equivalent and facilitates the deformation of the elastic water-stop tubular portion 12, whereby the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be more reliably absorbed.

図２２乃至図２６は本発明に係る既設管人孔接続部の耐震化工法を実施する第５例を示すものであり、図２２は人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図、図２３は人孔の周壁の管孔における既設管を切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図、図２４は弾性止水管状部内に鋼管を液密に嵌合した状態を示す縦断面図、図２５は弾性止水管状部に嵌合した鋼管の他例を示す断面図、図２６は既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。 FIG. 22 to FIG. 26 show a fifth example of implementing the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, and FIG. 22 shows the existing pipe fitted in the hole of the peripheral wall of the manhole. FIG. 23 is a longitudinal sectional view showing a state in which the inner wall of the human hole located around the portion to be cut off at the end of the existing pipe is cut out in an annular shape along the existing pipe. FIG. 24 is a longitudinal sectional view showing a state in which an elastic water-stop tubular portion is provided on an inner wall of a portion where an existing pipe is cut off in a tube hole of a peripheral wall of the hole, and FIG. 24 shows a state in which a steel pipe is liquid-tightly fitted in the elastic water-stop tubular portion. FIG. 25 is a cross-sectional view showing another example of the steel pipe fitted to the elastic water-stop tubular portion, and FIG. 26 is a vertical cross-sectional view showing a state where the lining pipe is arranged inside the existing pipe and the steel pipe.

図１に示す構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図２２に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するとともに、既設管２の端部における切除する部分の周囲に位置する人孔３の管孔５の内壁を、既設管２に沿って環状に切除する。この工程は、前記した第４例と同様なので、第４例の説明を援用し、この工程の詳細な説明を省略する。 As shown in FIG. 22, first, the seismic retrofit method for the existing pipe human hole connecting portion 6 having the structure shown in FIG. 1 is fitted into the pipe hole 5 of the basic peripheral wall portion 4 a of the human hole 3. The end portion of the existing pipe 2 is excised from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position in the vicinity of the outer peripheral wall surface 10 and not exceeding the outer peripheral wall surface 10, and at the end of the existing pipe 2 The inner wall of the tube hole 5 of the human hole 3 located around the portion to be cut is circularly cut along the existing tube 2. Since this process is the same as that of the above-mentioned 4th example, description of a 4th example is used and detailed description of this process is abbreviate | omitted.

次に、図２３に示すように、人孔３の基礎周壁部４ａの管孔５における既設管２を切除した部分の内壁に、既設管２と同心で且つ既設管２の内径と概ね同じ内径の弾性変形可能な弾性止水管状部１２を設ける。この工程も、前記した第４例と同様なので、第４例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 23, the inner wall of the portion of the basic peripheral wall portion 4 a of the human hole 3 where the existing tube 2 is removed is concentric with the existing tube 2 and is approximately the same as the inner diameter of the existing tube 2. The elastic water-stop tubular portion 12 is provided. Since this process is also the same as the above-described fourth example, the description of the fourth example is cited and the detailed description of this process is omitted.

本例では、後述するように、弾性止水管状部１２内に鋼管を液密に嵌合するが、弾性止水管状部１２を鋼管の外周面に接着させてもよく、または、図４に示すように、弾性止水管状部１２の内面を波状に形成し、鋼管の外周面に圧接させてもよい。また、図５、図６、図７に示すように、弾性止水管状部１２を軸方向に環状の凹部１２ａと凸部１２ｂを連続するように形成し、鋼管の外周面に接着或いは圧接させてもよい。いずれにしても、弾性止水管状部１２と管孔５の内壁との間及び弾性止水管状部１２と鋼管の外周面との間が止水されればよい。 In this example, as described later, the steel pipe is liquid-tightly fitted into the elastic water-stop tubular portion 12, but the elastic water-stop tubular portion 12 may be adhered to the outer peripheral surface of the steel pipe, or FIG. As shown, the inner surface of the elastic water-stop tubular portion 12 may be formed in a wave shape and pressed against the outer peripheral surface of the steel pipe. Also, as shown in FIGS. 5, 6, and 7, the elastic water-stop tubular portion 12 is formed so that the annular concave portion 12a and the convex portion 12b are continuous in the axial direction, and bonded or pressed against the outer peripheral surface of the steel pipe. May be. In any case, it is sufficient that the space between the elastic water-stop tubular portion 12 and the inner wall of the tube hole 5 and the space between the elastic water-stop tubular portion 12 and the outer peripheral surface of the steel pipe are stopped.

次に、図２４に示すように、弾性止水管状部１２内に鋼管１７を液密に嵌合する。この鋼管１７はステンレス製が好ましい。本例では、鋼管１７の外径が既設管２の内径と同径に形成され、弾性止水管状部１２内を通して端部切除後の既設管２内に鋼管の端部を嵌合している。この鋼管１７と弾性止水管状部１２とは、前記したように、接着させてもよく、或いは圧接させてもよい。 Next, as shown in FIG. 24, the steel pipe 17 is liquid-tightly fitted into the elastic water-stop tubular portion 12. The steel pipe 17 is preferably made of stainless steel. In this example, the outer diameter of the steel pipe 17 is formed to be the same as the inner diameter of the existing pipe 2, and the end of the steel pipe is fitted into the existing pipe 2 after end cutting through the elastic water-stop tubular portion 12. . As described above, the steel pipe 17 and the elastic water-stop tubular portion 12 may be bonded or press-contacted.

また、鋼管１７は、これに限られるものではなく、図２５に示すように、鋼管１７の内径が既設管２の内径と同径に形成されたものであってもよい。 In addition, the steel pipe 17 is not limited to this, and the inner diameter of the steel pipe 17 may be the same as the inner diameter of the existing pipe 2 as shown in FIG.

次に、図２６に示すように、既設管２及び鋼管１７の内部にライニング管１３を配置する。この工程も、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 26, the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17. Since this process is also the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

なお、前記既設管人孔接続部６の耐震化は、図面では、図上左側にある既設管人孔接続部６の耐震化の工程が示されているが、図上右側の既設管人孔接続部６についても、前記と同様の工程で耐震化が実施される。 In the drawing, the earthquake resistance of the existing pipe manhole connection portion 6 is shown in the drawing as a process of earthquake resistance of the existing pipe manhole connection portion 6 on the left side of the figure. The connection portion 6 is also made earthquake resistant in the same process as described above.

上記の既設管人孔接続部の耐震化工法によれば、第４例と同様に、管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するとともに、既設管２の端部における切除する部分の周囲に位置する管孔５の内壁を既設管２に沿って環状に切除するので、カッターは基礎周壁部４ａの外に突出せず、このため基礎周壁部４ａの外周壁面１０と既設管２の周囲との間は閉じられた状態にあり、外周壁面１０と既設管２の周囲との間から管孔５内へ基礎周壁部４ａの外にある土砂が流入することを防止でき、また水の流入も防止でき或いは最小限に抑えることができることになり、作業を容易に行うことができ、また、カッターにより基礎周壁部４ａの外周囲に近接して存在する地下ケーブルや各種流体用埋設管等の埋設物に傷を付けるおそれがない。 According to the earthquake resistance construction method for the existing pipe manhole connecting portion, the end portion of the existing pipe 2 fitted into the pipe hole 5 is connected to the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a as in the fourth example. To the position within the range not exceeding the outer peripheral wall surface 10 in the vicinity of the outer peripheral wall surface 10, and the inner wall of the tube hole 5 positioned around the portion to be cut off at the end of the existing tube 2 is annularly formed along the existing tube 2 Therefore, the cutter does not protrude outside the base peripheral wall portion 4a, and therefore, the space between the outer peripheral wall surface 10 of the base peripheral wall portion 4a and the periphery of the existing pipe 2 is closed. It is possible to prevent the earth and sand outside the foundation peripheral wall portion 4a from flowing into the hole 5 from between the periphery of the pipe 2 and to prevent or minimize the inflow of water. It can be easily done, and the outer periphery of the basic peripheral wall 4a by the cutter There is no risk of damaging the buried objects underground cables and various fluid buried pipe or the like in close proximity.

また、管孔５における既設管２を切除した部分の内壁に、既設管２と同心で且つ既設管２の内径と概ね同じ内径の弾性変形可能な弾性止水管状部１２を設け、弾性止水管状部１２内に鋼管１７を液密に嵌合し、既設管２及び鋼管１７の内部にライニング管１３を配置するので、鋼管１７とライニング管１３とが既設管２としての役割を果たし、その端部が管孔５に嵌合される既設管２の端部を構成することになるので、既設管人孔接続部６の強度を十分保持することができ、そして、地震が発生したとき、地震により生じる鋼管１７とライニング管１３で構成される既設管２と人孔３の周壁４との動きの違いを弾性止水管状部１２で吸収できる。 Further, an elastic water-stopping tubular portion 12 that is concentric with the existing pipe 2 and has an inner diameter that is substantially the same as the inner diameter of the existing pipe 2 is provided on the inner wall of a portion of the pipe hole 5 where the existing pipe 2 is cut out. Since the steel pipe 17 is liquid-tightly fitted in the shaped part 12 and the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17, the steel pipe 17 and the lining pipe 13 serve as the existing pipe 2, Since the end portion constitutes the end portion of the existing pipe 2 fitted into the pipe hole 5, the strength of the existing pipe manhole connection portion 6 can be sufficiently maintained, and when an earthquake occurs, The difference in movement between the existing pipe 2 constituted by the steel pipe 17 and the lining pipe 13 caused by the earthquake and the peripheral wall 4 of the human hole 3 can be absorbed by the elastic water-stop tubular portion 12.

即ち、前記した第４例と同様に、既設管２と人孔３の周壁４との上下方向の動きの違いは、弾性止水管状部１２の肉厚方向の変形により吸収され、また、既設管２と人孔３の周壁４との軸方向の動きの違いは、弾性止水管状部１２とライニング管１３が接着している場合は、弾性止水管状部１２の軸方向の変形により、そして弾性止水管状部１２とライニング管１３が圧接している場合は、弾性止水管状部１２の軸方向の変形とライニング管１３の軸方向のスライドにより吸収される。 That is, as in the fourth example described above, the difference in vertical movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 is absorbed by the deformation in the thickness direction of the elastic water-stop tubular portion 12, and The difference in axial movement between the pipe 2 and the peripheral wall 4 of the human hole 3 is that when the elastic water-stop tubular portion 12 and the lining pipe 13 are bonded, the elastic water-stop tubular portion 12 is deformed in the axial direction. When the elastic water-stop tubular portion 12 and the lining pipe 13 are in pressure contact, they are absorbed by the axial deformation of the elastic water-stop tubular portion 12 and the axial slide of the lining pipe 13.

また、弾性止水管状部１２の端面は、その下側略半分がインバートコンクリート１１の切除部に充填した充填材１５により塞がれ、上側略半分だけが開放されることになるが、本例では、充填材１５が弾性材であるので、弾性止水管状部１２の端面の下側略半分は弾性材からなる充填材１５で塞がれることになる。この結果、弾性止水管状部１２の端面の下側略半分の変形は、弾性材からなる充填材１５で吸収されるので、弾性止水管状部１２の端面の下側略半分も開放面と同等となり、弾性止水管状部１２の変形を容易にし、これにより既設管２と人孔３の周壁４との軸方向の動きの違いをより確実に吸収することができる。 Further, the end face of the elastic water-stop tubular portion 12 is closed by the filler 15 filled in the cut portion of the invert concrete 11 at the lower half thereof, and only the upper half is opened. Then, since the filler 15 is an elastic material, the lower half of the end surface of the elastic water-stop tubular portion 12 is closed with the filler 15 made of an elastic material. As a result, the deformation of the lower half of the end face of the elastic water-stop tubular portion 12 is absorbed by the filler 15 made of an elastic material, so that the lower half of the end face of the elastic water-stop tubular portion 12 is also open. It becomes equivalent and facilitates the deformation of the elastic water-stop tubular portion 12, whereby the difference in the axial movement between the existing pipe 2 and the peripheral wall 4 of the human hole 3 can be more reliably absorbed.

図２７乃至図３０は本発明に係る既設管人孔接続部の耐震化工法を実施する第６例を示すものであり、図２７は人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図、図２８は人孔の周壁の管孔を通して端部切除後の既設管内に鋼管の端部を嵌合した状態を示す縦断面図、図２９は鋼管と人孔の周壁の管孔における既設管を切除した部分の内壁との間に弾性止水管状部を液密に設けた状態を示す縦断面図、図３０は既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。 FIGS. 27 to 30 show a sixth example in which the seismic retrofitting method for an existing pipe manhole connection portion according to the present invention is carried out, and FIG. 27 shows an existing pipe fitted in a hole in the peripheral wall of the manhole. FIG. 28 is a longitudinal sectional view showing a state in which the inner wall of the human hole located around the portion to be cut off at the end of the existing pipe is cut out in an annular shape along the existing pipe. FIG. 29 is a longitudinal sectional view showing a state in which the end of the steel pipe is fitted into the existing pipe after the end is cut through the hole in the peripheral wall of the hole. FIG. 30 is a longitudinal sectional view showing a state in which an elastic water blocking tubular portion is provided in a liquid-tight manner between the inner wall and an inner wall, and FIG. 30 is a longitudinal sectional view showing a state in which a lining pipe is disposed inside an existing pipe and a steel pipe.

図１に示す構造の既設管人孔接続部６に対して行う本例の耐震化工法は、先ず、図２７に示すように、人孔３の基礎周壁部４ａの管孔５に嵌合している既設管２の端部を、基礎周壁部４ａの内周壁面９側から外周壁面１０の近傍で外周壁面１０を超えない範囲内の位置まで切除するとともに、既設管２の端部における切除する部分の周囲に位置する人孔３の管孔５の内壁を、既設管２に沿って環状に切除する。この工程は、前記した第４例と同様なので、第４例の説明を援用し、この工程の詳細な説明を省略する。 As shown in FIG. 27, first, the seismic retrofit method for the existing pipe human hole connection portion 6 having the structure shown in FIG. 1 is fitted into the pipe hole 5 of the basic peripheral wall portion 4a of the human hole 3. The end portion of the existing pipe 2 is excised from the inner peripheral wall surface 9 side of the foundation peripheral wall portion 4a to a position in the vicinity of the outer peripheral wall surface 10 and not exceeding the outer peripheral wall surface 10, and at the end of the existing pipe 2 The inner wall of the tube hole 5 of the human hole 3 located around the portion to be cut is circularly cut along the existing tube 2. Since this process is the same as that of the above-mentioned 4th example, description of a 4th example is used and detailed description of this process is abbreviate | omitted.

次に、図２８に示すように、管孔５を通して端部切除後の既設管２内に鋼管１７の端部を嵌合する。この鋼管１７はステンレス製が好ましい。 Next, as shown in FIG. 28, the end portion of the steel pipe 17 is fitted into the existing pipe 2 after the end portion is cut through the tube hole 5. The steel pipe 17 is preferably made of stainless steel.

次に、図２９に示すように、鋼管１７と管孔５における既設管２を切除した部分の内壁との間に弾性止水管状部１２を液密に設ける。弾性止水管状部１２は、第１例と同様に、例えばシリコン樹脂、軟性エポキシウレタン等の軟性樹脂や吸水材を含有する水膨張ゴム材等の弾性止水材を用いて成形される。 Next, as shown in FIG. 29, an elastic water-stop tubular portion 12 is provided in a liquid-tight manner between the steel pipe 17 and the inner wall of the portion of the tube hole 5 where the existing tube 2 is cut away. Similarly to the first example, the elastic water-stop tubular portion 12 is formed using an elastic water-stop material such as a water-expandable rubber material containing a soft resin such as silicon resin or soft epoxy urethane, or a water-absorbing material.

次に、図３０に示すように、既設管２及び鋼管１７の内部にライニング管１３を配置する。この工程も、前記した第１例と同様なので、第１例の説明を援用し、この工程の詳細な説明を省略する。 Next, as shown in FIG. 30, the lining pipe 13 is disposed inside the existing pipe 2 and the steel pipe 17. Since this process is also the same as the first example described above, the description of the first example is cited and the detailed description of this process is omitted.

また、管孔５を通して、端部切除後の既設管２内に鋼管１７の端部を嵌合し、鋼管１７と管孔５における既設管２を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部１２を液密に設けるので、この弾性止水管状部１２が弾性止水材を型枠に注入することにより現場成形されて設けられる場合、鋼管１７が弾性止水管状部１２の成形型枠を兼ねるものとなり、弾性止水管状部１２を成形するための型枠を容易する必要がなくなる。 Further, the end of the steel pipe 17 is fitted into the existing pipe 2 after the end portion is cut through the pipe hole 5, and elastic deformation is caused between the steel pipe 17 and the inner wall of the portion of the pipe hole 5 where the existing pipe 2 is cut off. Since the possible elastic water-stop tubular portion 12 is provided in a liquid-tight manner, when the elastic water-stop tubular portion 12 is provided by being molded in situ by injecting an elastic water-proof material into the mold, the steel pipe 17 is provided with an elastic water-stop tubular portion. This also serves as a mold for forming the portion 12, and it is not necessary to facilitate a mold for forming the elastic water-stop tubular portion 12.

本発明に係る既設管人孔接続部の耐震化工法の実施の第１例の工程で、工事前の状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state before construction in the process of the 1st example of implementation of the earthquake resistance construction method of the existing pipe manhole connection part which concerns on this invention. 本発明に係る既設管人孔接続部の耐震化工法の実施の第１例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図である。The longitudinal cross-section which shows the state which excised the edge part of the existing pipe fitted to the pipe hole of the surrounding wall of a human hole in the process of the 1st example of implementation of the earthquake resistance construction method of the existing pipe human hole connection part which concerns on this invention FIG. 第１例の工程で、人孔の周壁の管孔における既設管の切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part in the inner wall of the part which the existing pipe cut out in the pipe hole of the surrounding wall of a human hole in the process of the 1st example. 第１例の工程で、弾性止水管状部の他例を示す断面図である。It is sectional drawing which shows the other example of an elastic water stop tubular part at the process of the 1st example. 第１例の工程で、弾性止水管状部の他例を示す拡大断面図である。It is an expanded sectional view showing other examples of an elastic water stop tubular part at the process of the 1st example. 第１例の工程で、弾性止水管状部の他例を示す拡大断面図である。It is an expanded sectional view showing other examples of an elastic water stop tubular part at the process of the 1st example. 第１例の工程で、弾性止水管状部の他例を示す拡大断面図である。It is an expanded sectional view showing other examples of an elastic water stop tubular part at the process of the 1st example. 第１例の工程で、既設管及び弾性止水管状部の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe | tube inside the existing pipe | tube and the elastic water stop tubular part in the process of the 1st example. 第１例の工程で、ライニング管の他例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the other example of a lining pipe | tube in the process of a 1st example. 本発明に係る既設管人孔接続部の耐震化工法の実施の第２例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図である。The longitudinal cross-section which shows the state which cut off the edge part of the existing pipe fitted to the pipe hole of the surrounding wall of a human hole in the process of the 2nd example of implementation of the earthquake resistance construction method of the existing pipe human hole connection part which concerns on this invention FIG. 第２例の工程で、人孔の周壁の管孔における既設管の切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part in the inner wall of the part which the existing pipe removed in the pipe hole of the surrounding wall of a human hole at the process of the 2nd example. 第２例の工程で、弾性止水管状部内に鋼管を液密に嵌合した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the steel pipe liquid-tightly in the elastic water stop tubular part at the process of the 2nd example. 第２例の工程で、弾性止水管状部に嵌合した鋼管の他例を示す断面図である。It is sectional drawing which shows the other example of the steel pipe fitted to the elastic water stop tubular part at the process of the 2nd example. 第２例の工程で、既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe inside the existing pipe and the steel pipe at the process of the 2nd example. 本発明に係る既設管人孔接続部の耐震化工法の実施の第３例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除した状態を示す縦断面図である。The longitudinal cross-section which shows the state which cut off the edge part of the existing pipe fitted to the pipe hole of the surrounding wall of a human hole in the process of the 3rd example of implementation of the earthquake resistance construction method of the existing pipe human hole connection part which concerns on this invention FIG. 第３例の工程で、人孔の周壁の管孔を通して端部切除後の既設管内に鋼管の端部を嵌合した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the edge part of the steel pipe in the existing pipe after end cutting through the hole of the surrounding wall of a human hole at the process of the 3rd example. 第３例の工程で、鋼管と人孔の周壁の管孔における既設管を切除した部分の内壁との間に弾性止水管状部を液密に設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part liquid-tightly between the inner wall of the part which excised the existing pipe in the pipe hole of the surrounding wall of a human hole in the process of the 3rd example. 第３例の工程で、既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe inside the existing pipe and the steel pipe at the process of the 3rd example. 本発明に係る既設管人孔接続部の耐震化工法の実施の第４例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図である。In the step of the fourth example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is excised, and the existing pipe It is a longitudinal cross-sectional view which shows the state which cut | disconnected the inner wall of the hole of the human hole located around the part to cut out in an edge part cyclically | annularly along the existing pipe | tube. 第４例の工程で、人孔の周壁の管孔における既設管を切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part in the inner wall of the part which excised the existing pipe | tube in the pipe hole of the surrounding wall of a human hole at the process of the 4th example. 第４例の工程で、既設管及び弾性止水管状部の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe | tube inside the existing pipe | tube and the elastic water stop tubular part in the process of the 4th example. 本発明に係る既設管人孔接続部の耐震化工法の実施の第５例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図である。In the step of the fifth example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, the end portion of the existing pipe fitted into the pipe hole on the peripheral wall of the human hole is excised, and the existing pipe It is a longitudinal cross-sectional view which shows the state which cut | disconnected the inner wall of the hole of the human hole located around the part to cut out in an edge part cyclically | annularly along the existing pipe | tube. 第５例の工程で、人孔の周壁の管孔における既設管を切除した部分の内壁に弾性止水管状部を設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water stop tubular part in the inner wall of the part which excised the existing pipe in the pipe hole of the surrounding wall of a human hole in the process of the 5th example. 第５例の工程で、弾性止水管状部内に鋼管を液密に嵌合した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the steel pipe liquid-tightly in the elastic water stop tubular part at the process of the 5th example. 第５例の工程で、弾性止水管状部に嵌合した鋼管の他例を示す断面図である。It is sectional drawing which shows the other example of the steel pipe fitted to the elastic water stop tubular part at the process of the 5th example. 第５例の工程で、既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe inside the existing pipe and the steel pipe at the process of the 5th example. 本発明に係る既設管人孔接続部の耐震化工法の実施の第６例の工程で、人孔の周壁の管孔に嵌合している既設管の端部を切除するとともに、既設管の端部における切除する部分の周囲に位置する人孔の管孔の内壁を既設管に沿って環状に切除した状態を示す縦断面図である。In the process of the sixth example of the implementation of the seismic retrofitting method for the existing pipe manhole connection portion according to the present invention, the end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the manhole is excised, and the existing pipe It is a longitudinal cross-sectional view which shows the state which cut | disconnected the inner wall of the hole of the human hole located around the part to cut out in an edge part cyclically | annularly along the existing pipe | tube. 第６例の工程で、人孔の周壁の管孔を通して端部切除後の既設管内に鋼管の端部を嵌合した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which fitted the edge part of the steel pipe in the existing pipe after end cutting through the hole of the surrounding wall of a human hole at the process of the 6th example. 第６例の工程で、鋼管と人孔の周壁の管孔における既設管を切除した部分の内壁との間に弾性止水管状部を液密に設けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which provided the elastic water-stop tubular part liquid-tightly between the inner wall of the part which excised the existing pipe in the pipe hole of the surrounding wall of a human hole in the process of the 6th example. 第６例の工程で、既設管及び鋼管の内部にライニング管を配置した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which has arrange | positioned the lining pipe inside the existing pipe and the steel pipe at the process of the 6th example.

符号の説明Explanation of symbols

１地盤
２既設管
３人孔
４周壁
４ａ基礎周壁部
４ｂ成型周壁部
５管孔
６既設管人孔接続部
７開口部
８蓋
９内周壁面
１０外周壁面
１１インバートコンクリート
１２弾性止水管状部
１２ａ凹部
１２ｂ凸部
１３ライニング管
１４筒状ライニング材
１４ａシート状ライニング材
１５，１６充填材
１７鋼管 DESCRIPTION OF SYMBOLS 1 Ground 2 Existing pipe 3 Human hole 4 Peripheral wall 4a Foundation peripheral wall part 4b Molding peripheral wall part 5 Pipe hole 6 Existing pipe human hole connection part 7 Opening part 8 Lid 9 Inner peripheral wall surface 10 Outer wall surface 11 Invert concrete 12 Elastic water stop tubular part 12a Concave part 12b Convex part 13 Lining pipe 14 Cylindrical lining material 14a Sheet-like lining material 15, 16 Filling material 17 Steel pipe

Claims

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除する工程と、
前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設ける工程と、
前記既設管及び前記弾性止水管状部の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is at least 0.5 cm from the inner peripheral wall surface side of the peripheral wall of the human hole in the vicinity of the outer peripheral wall surface of the peripheral wall. A process of excising to the position left above ,
A step of providing an elastically deformable elastic water-stop tubular portion having a thickness substantially equal to the thickness of the existing tube on the inner wall of a portion of the peripheral hole of the human hole where the existing tube is cut off;
An earthquake resistant construction method for an existing pipe manhole connection part, comprising a step of arranging a lining pipe inside the existing pipe and the elastic water blocking tubular part.

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除する工程と、
前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管の肉厚と概ね等しい厚さの弾性変形可能な弾性止水管状部を設ける工程と、
前記弾性止水管状部内に鋼管を液密に嵌合する工程と、前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is within the range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to a position,
A step of providing an elastically deformable elastic water-stop tubular portion having a thickness substantially equal to the thickness of the existing tube on the inner wall of a portion of the peripheral hole of the human hole where the existing tube is cut off;
A method of seismicizing an existing pipe manhole connection portion, comprising: a step of liquid-tightly fitting a steel pipe in the elastic water-stop tubular portion; and a step of arranging a lining pipe inside the existing pipe and the steel pipe. .

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除する工程と、
前記人孔の周壁の前記管孔を通して、前記端部切除後の既設管内に鋼管の端部を嵌合する工程と、
前記鋼管と前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部を液密に設ける工程と、
前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is within the range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting to a position,
Fitting the end of the steel pipe into the existing pipe after the end excision through the pipe hole in the peripheral wall of the manhole;
A step of liquid-tightly providing an elastically deformable elastic water stop tubular portion between the steel pipe and an inner wall of a portion of the peripheral hole of the human hole where the existing pipe is cut off;
An earthquake resistant construction method for an existing pipe manhole connection portion, comprising a step of arranging a lining pipe inside the existing pipe and the steel pipe.

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で、少なくとも外周壁面から０．５ｃｍ以上残した位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、
前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設ける工程と、
前記既設管及び前記弾性止水管状部の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part quake-resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end portion of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is at least 0.5 cm from the inner peripheral wall surface side of the peripheral wall of the human hole in the vicinity of the outer peripheral wall surface of the peripheral wall. Cutting to the position left above, and annularly cutting the inner wall of the hole of the human hole located around the portion to be cut off at the end of the existing pipe along the existing pipe;
A step of providing an elastically deformable elastic water-stop tubular portion concentric with the existing pipe and having an inner diameter substantially the same as the inner diameter of the existing pipe on the inner wall of the peripheral hole of the human hole where the existing pipe is removed. When,
An earthquake resistant construction method for an existing pipe manhole connection part, comprising a step of arranging a lining pipe inside the existing pipe and the elastic water blocking tubular part.

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、
前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁に、前記既設管と同心で且つ前記既設管の内径と概ね同じ内径の弾性変形可能な弾性止水管状部を設ける工程と、前記弾性止水管状部内に鋼管を液密に嵌合する工程と、
前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part seismic resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is within a range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting the inner wall of the tube hole of the human hole located around the portion to be cut off at the end of the existing pipe, and cutting the ring along the existing pipe,
A step of providing an elastically deformable elastic water-stop tubular portion concentric with the existing pipe and having an inner diameter substantially the same as the inner diameter of the existing pipe on the inner wall of the peripheral hole of the human hole where the existing pipe is cut off. And a step of liquid-tightly fitting a steel pipe in the elastic water-stop tubular portion;
An earthquake resistant construction method for an existing pipe manhole connection portion, comprising a step of arranging a lining pipe inside the existing pipe and the steel pipe.

既設管が人孔の周壁の管孔に嵌合して接続されている既設管人孔接続部の耐震化を図る既設管人孔接続部の耐震化工法であって、
前記人孔の周壁の前記管孔に嵌合している前記既設管の端部を、前記人孔の周壁の内周壁面側から前記周壁の外周壁面の近傍で外周壁面を超えない範囲内の位置まで切除するとともに、前記既設管の端部における切除する部分の周囲に位置する前記人孔の管孔の内壁を前記既設管に沿って環状に切除する工程と、
前記人孔の周壁の前記管孔を通して、前記端部切除後の既設管内に鋼管の端部を嵌合する工程と、
前記鋼管と前記人孔の周壁の前記管孔における前記既設管を切除した部分の内壁との間に、弾性変形可能な弾性止水管状部を液密に設ける工程と、
前記既設管及び前記鋼管の内部にライニング管を配置する工程を含むことを特徴とする既設管人孔接続部の耐震化工法。 A seismic construction method for an existing pipe human hole connection part that aims to make the existing pipe human hole connection part seismic resistant by fitting the existing pipe to the pipe hole of the peripheral wall of the human hole,
The end of the existing pipe fitted into the pipe hole of the peripheral wall of the human hole is within a range not exceeding the outer peripheral wall surface in the vicinity of the outer peripheral wall surface of the peripheral wall from the inner peripheral wall surface side of the peripheral wall of the human hole. Cutting the inner wall of the tube hole of the human hole located around the portion to be cut off at the end of the existing pipe, and cutting the ring along the existing pipe,
Fitting the end of the steel pipe into the existing pipe after the end excision through the pipe hole in the peripheral wall of the manhole;
A step of liquid-tightly providing an elastically deformable elastic water stop tubular portion between the steel pipe and an inner wall of a portion of the peripheral hole of the human hole where the existing pipe is cut off;
An earthquake resistant construction method for an existing pipe manhole connection portion, comprising a step of arranging a lining pipe inside the existing pipe and the steel pipe.