JP2018123663A - Manhole and method for regenerating manhole - Google Patents

Manhole and method for regenerating manhole Download PDF

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JP2018123663A
JP2018123663A JP2017136492A JP2017136492A JP2018123663A JP 2018123663 A JP2018123663 A JP 2018123663A JP 2017136492 A JP2017136492 A JP 2017136492A JP 2017136492 A JP2017136492 A JP 2017136492A JP 2018123663 A JP2018123663 A JP 2018123663A
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cylinder
covering
pedestal
gap
cylindrical body
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JP6876554B2 (en
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臨 中村
Nozomu Nakamura
臨 中村
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Sekisui Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a manhole capable of preventing a load applied to an upper cylindrical body from the ground from transmitted to a lower cylindrical body.SOLUTION: A manhole 1 has a cylindrical lower cylindrical body 10 which is embedded in the ground and extends to a vertical direction, and an upper cylindrical body 20 that is arranged on the lower cylindrical body 10 and of which the upper end opening opened to the ground G is blocked by a lid body includes: a coated cylinder 30 that covers an inner peripheral surface of the lower cylindrical body 10 and of which the upper end projects upward from the lower cylindrical body 10; an intervention layer 40 arranged in the outside in a radial direction in the upper part of the coated cylinder 30; and an annular pedestal 50 which is mounted on the upper surface of the intervention layer 40 and surrounds the upper end of the coated cylinder 30 from the outside in the radial direction, where the upper cylindrical body 20 is mounted on the upper surface of the pedestal 50.SELECTED DRAWING: Figure 1

Description

本発明は、人孔および人孔の更生方法に関する。   The present invention relates to a manhole and a method for rehabilitation of a manhole.

従来から、下記特許文献１に示されるように、地中に埋設され、上下方向に延びる筒状の下筒体と、下筒体上に配設され、地面に開口する上端開口部が蓋体によって閉塞される上筒体と、を備えた人孔が知られている。この人孔では、上筒体が下筒体の上端開口縁に載置されている。   Conventionally, as shown in Patent Document 1 below, a cylindrical lower cylinder that is embedded in the ground and extends in the vertical direction, and an upper end opening that is disposed on the lower cylinder and opens to the ground is a lid. There is known a human hole provided with an upper cylinder closed by the In this human hole, the upper cylinder is placed on the upper end opening edge of the lower cylinder.

特開２０１２−３６６５５号公報JP 2012-36655 A

しかしながら、前記従来の人孔では、下筒体の上端開口縁に上筒体が直接載置されているので、地上から上筒体に加えられた荷重が、下筒体に直に伝わることとなり、下筒体の耐久性に懸念があった。   However, in the conventional human hole, since the upper cylinder is directly placed on the upper end opening edge of the lower cylinder, the load applied to the upper cylinder from the ground is directly transmitted to the lower cylinder. There was concern about the durability of the lower cylinder.

本発明は、前述した事情に鑑みてなされたものであって、地上から上筒体に加えられた荷重が、下筒体に伝わるのを抑制することができる人孔を提供することを目的とする。   This invention is made in view of the situation mentioned above, Comprising: It aims at providing the human hole which can suppress that the load added to the upper cylinder from the ground is transmitted to a lower cylinder. To do.

前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係る人孔は、地中に埋設され、上下方向に延びる筒状の下筒体と、前記下筒体上に配設され、地面に開口する上端開口部が蓋体によって閉塞される上筒体と、を備えた人孔であって、前記下筒体の内周面を覆い、上端部が前記下筒体から上方に突出する被覆筒と、前記被覆筒の上部における径方向の外側に配設された介在層と、前記介在層の上面に載置され、前記被覆筒の上端部を径方向の外側から囲繞する環状の台座と、を備え、前記上筒体は、前記台座の上面に載置されていることを特徴とする。 In order to solve the above problems, the present invention proposes the following means.
The human hole according to the present invention is embedded in the ground and extends in the up-down direction, and is disposed on the lower cylinder, and the upper end opening that opens to the ground is closed by the lid. A mandrel comprising an upper cylinder, a covering cylinder that covers an inner peripheral surface of the lower cylinder, and an upper end projects upward from the lower cylinder, and a radial direction at an upper part of the covering cylinder An intervening layer disposed outside, and an annular pedestal mounted on the upper surface of the intervening layer and surrounding an upper end portion of the covering cylinder from the outside in the radial direction, and the upper cylindrical body includes the pedestal It is characterized by being placed on the upper surface.

この場合、下筒体の上端部と上筒体の下端部との間に、介在層が配設されているので、地上から上筒体に荷重が加えられると、この荷重が台座を介して介在層に伝わることとなる。そして、介在層が存在することで、前記荷重を分散もしくは吸収することが可能になり、前記荷重が下筒体に伝わるのを抑制することができる。   In this case, since an intervening layer is disposed between the upper end portion of the lower cylinder body and the lower end portion of the upper cylinder body, when a load is applied to the upper cylinder body from the ground, this load is passed through the pedestal. It will be transmitted to the intervening layer. The presence of the intervening layer makes it possible to disperse or absorb the load, and to prevent the load from being transmitted to the lower cylinder.

また、下筒体の内周面が被覆筒により覆われているので、下筒体の内周面が、人孔内の液体や気体等に接するのを防ぐことが可能になり、下筒体の内周面が腐食するのを抑えることができる。
さらに、被覆筒の上端部が下筒体から上方に突出し、この上部における径方向の外側に介在層が配設されているので、介在層が被覆筒によって径方向の内側から支持されることとなり、下筒体の上端開口部から下筒体の内部に介在層が流入するのを防ぐことができる。またこのように、介在層が被覆筒の径方向の外側に配設されているので、介在層に人孔内の液体や気体等が接するのを抑えることができる。 In addition, since the inner peripheral surface of the lower cylinder is covered with the covering cylinder, it is possible to prevent the inner peripheral surface of the lower cylinder from coming into contact with the liquid or gas in the human hole. Corrosion of the inner peripheral surface of the can be suppressed.
Furthermore, since the upper end portion of the covering cylinder protrudes upward from the lower cylinder body and the intervening layer is disposed on the outer side in the radial direction at the upper part, the interposing layer is supported from the inner side in the radial direction by the covering cylinder. The intervening layer can be prevented from flowing into the inside of the lower cylinder from the upper end opening of the lower cylinder. Further, as described above, since the intervening layer is disposed on the outer side in the radial direction of the covering cylinder, it is possible to prevent the liquid or gas in the human hole from coming into contact with the intervening layer.

前記台座と前記被覆筒との間の径方向の隙間には、水膨張性を備えた止水材が配設されてもよい。   A water stop material having water expandability may be disposed in a radial gap between the base and the covering cylinder.

この場合、台座と被覆筒との間の径方向の隙間に、水膨張性を備えた止水材が配設されている。このため、止水材が、被覆筒の内側から前記径方向の隙間に進入した水や、台座の上下方向又は径方向の外側から、台座の内側に侵入した水を含むことで膨張し、台座の内周面と、被覆筒の外周面と、の間に径方向に圧縮変形されることで、止水材がシール性を発揮することができる。よって、台座の内径および被覆筒の外径の寸法精度を高くする必要が無い。
また、止水材が、台座と被覆筒との間の径方向の隙間に配設されていることから、仮に地面の沈下等により、台座および被覆筒が、上下方向に相対変位した場合であっても、止水材が過度に圧縮変形して押しつぶされることがなく、止水材によるシール性を維持することができる。 In this case, a water stop material having water expandability is disposed in a radial gap between the base and the covering cylinder. For this reason, the water-stopping material expands by including water that has entered the gap in the radial direction from the inside of the covering cylinder, and water that has entered the inside of the pedestal from the vertical direction or radial outside of the pedestal, By being compressed and deformed in the radial direction between the inner peripheral surface and the outer peripheral surface of the coated cylinder, the water-stopping material can exhibit sealing properties. Therefore, there is no need to increase the dimensional accuracy of the inner diameter of the pedestal and the outer diameter of the covering cylinder.
In addition, since the water stop material is disposed in the radial gap between the pedestal and the covering cylinder, the pedestal and the covering cylinder are displaced relative to each other in the vertical direction due to the ground sinking or the like. However, the water-stopping material is not excessively deformed and crushed, and the sealing performance by the water-stopping material can be maintained.

また、止水材が水膨張性によりシール性を発揮するため、台座と被覆筒との間の径方向の隙間の大きさが、周方向の位置により仮にばらつく場合であっても、前記隙間を止水材の膨張により確実にシールすることが可能になる。これにより、台座および被覆筒の寸法管理を容易に行うことができる。
また、止水材が台座の内周面、および被覆筒の外周面に対して接着されることなく当接していることから、例えば止水材が、台座の内周面、および被覆筒の外周面に接着されている構成と異なり、仮に地上からの振動、又は地震の揺れが、止水材に加えられたとしても、止水材のうち、台座の内周面、および被覆筒の外周面との当接部分の接着が剥がれて隙間が生じるようなことが無く、台座と被覆筒との間の径方向の隙間を確実にシールすることができる。 In addition, since the water-stopping material exhibits sealing properties due to water expansion, even if the size of the radial gap between the pedestal and the covering cylinder varies depending on the position in the circumferential direction, the gap may be reduced. It becomes possible to seal reliably by expansion | swelling of a water stop material. Thereby, the dimension management of a base and a covering cylinder can be performed easily.
Further, since the water-stopping material is in contact with the inner peripheral surface of the pedestal and the outer peripheral surface of the covering cylinder without being bonded, for example, the water-stopping material is connected to the inner peripheral surface of the pedestal and the outer periphery of the covering cylinder. Unlike the structure that is bonded to the surface, even if vibration from the ground or earthquake is applied to the water-stopping material, among the water-stopping material, the inner peripheral surface of the pedestal and the outer peripheral surface of the coated cylinder There is no possibility that the contact portion is peeled off and a gap is formed, and the radial gap between the pedestal and the covering cylinder can be reliably sealed.

前記被覆筒の上端部と、前記上筒体の下端部と、の間には、上下方向の隙間が設けられ、前記隙間には、弾性変形可能なシール材が配設されてもよい。   A vertical gap may be provided between the upper end of the coated cylinder and the lower end of the upper cylinder, and an elastically deformable sealing material may be provided in the gap.

この場合、地上からの振動、又は地震の揺れが、上筒体および下筒体に加えられたり、地盤の沈下が生じたりすることで、上筒体および下筒体の上下方向の相対的な位置が変位した場合であっても、この変位に追従してシール材が弾性変形することで、被覆筒と上筒体との間のシール性を維持することができる。   In this case, the vibration from the ground or the shaking of the earthquake is applied to the upper cylinder and the lower cylinder, or the ground sinks, causing the upper cylinder and the lower cylinder to move relative to each other in the vertical direction. Even when the position is displaced, the sealing material between the covering cylinder and the upper cylinder can be maintained by elastically deforming the sealing material following the displacement.

前記台座と前記被覆筒と間の径方向の隙間には、間詰材が充填されてもよい。   A gap material in a radial direction between the pedestal and the covering cylinder may be filled with a filling material.

この場合、台座と被覆筒との間の径方向の隙間に間詰材が充填されるので、台座の内径および被覆筒の外径の寸法精度を高くする必要が無く、台座および被覆筒の加工を容易に行うことができる。   In this case, since the gap in the radial direction between the pedestal and the covering cylinder is filled with the filling material, it is not necessary to increase the dimensional accuracy of the inner diameter of the pedestal and the outer diameter of the covering cylinder, and the processing of the pedestal and the covering cylinder is performed. Can be easily performed.

また、前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係る人孔の更生方法は、地面に開口する上端開口部が蓋体によって閉塞される上筒体を、地中に埋設され、上下方向に延びる筒状の下筒体上から撤去する撤去工程と、前記下筒体の内周面を、上端部が前記下筒体から上方に突出した被覆筒により覆う被覆工程と、前記被覆筒の上部における径方向の外側に、介在層を配設する配設工程と、前記介在層の上面に、前記被覆筒の上端部を径方向の外側から囲繞する環状の台座を載置する台座載置工程と、前記台座の上面に、前記上筒体よりも上下方向の長さが短い新たな上筒体を載置する上筒体載置工程と、を備えることを特徴とする。 Moreover, in order to solve the said subject, this invention has proposed the following means.
In the method for rehabilitating a human hole according to the present invention, an upper cylindrical body whose upper end opening that opens to the ground is closed by a lid is removed from a cylindrical lower cylindrical body that is embedded in the ground and extends in the vertical direction. An intervening layer is disposed outside the removing step, the covering step of covering the inner peripheral surface of the lower cylinder body with a covering cylinder whose upper end protrudes upward from the lower cylinder body, and the radially outer side at the upper part of the covering cylinder. A disposing step to dispose, a pedestal placing step for placing an annular pedestal surrounding the upper end portion of the covering tube from the outside in the radial direction on the upper surface of the intervening layer, and the upper tube on the upper surface of the pedestal An upper cylinder placing step of placing a new upper cylinder having a shorter vertical length than the body.

この場合、配設工程の前の被覆工程時に、被覆筒の上端部を下筒体から突出させているので、配設工程時に、被覆筒の上端部により、介在層を径方向の内側から支持することが可能になる。このため、下筒体の上端開口部から、下筒体の内部に介在層が流入するのを防ぐことができ、配設工程を容易に行うことができる。   In this case, since the upper end portion of the covering cylinder protrudes from the lower cylinder during the covering step before the disposing step, the intervening layer is supported from the radially inner side by the upper end portion of the covering tube during the disposing step. It becomes possible to do. For this reason, it can prevent that an intervening layer flows into the inside of a lower cylinder from the upper-end opening part of a lower cylinder, and can perform an arrangement | positioning process easily.

前記上筒体載置工程時に、前記台座と前記被覆筒との間の径方向の隙間に、水膨張性を備えた止水材を配設してもよい。
この場合、台座と被覆筒との間の径方向の隙間に配設した止水材が水分を含むことで、この止水材にシール性を発揮させることができるので、例えば止水材を、台座の内周面、および被覆筒の外周面に接着することでシール性を発揮させる構成と比較して、止水材の配設作業を容易に行うことができる。 In the upper cylinder mounting step, a water stop material having water expandability may be disposed in a radial gap between the pedestal and the covering cylinder.
In this case, since the water-stopping material disposed in the radial gap between the pedestal and the covering cylinder contains moisture, the water-stopping material can exhibit sealing properties. Compared with the structure which exhibits the sealing performance by adhering to the inner peripheral surface of the pedestal and the outer peripheral surface of the covering cylinder, it is possible to easily perform the work of disposing the water-stopping material.

前記上筒体載置工程時に、前記被覆筒の上端開口縁と、前記新たな上筒体と、により弾性変形可能なシール材を、上下方向に挟み込み圧縮変形させてもよい。   At the time of the upper cylinder mounting step, a sealing material that can be elastically deformed by the upper end opening edge of the covering cylinder and the new upper cylinder may be sandwiched in the vertical direction and compressed and deformed.

この場合、例えば被覆筒の上端開口縁にシール材を載置した後に、上筒体載置工程時に、台座の上面に上筒体を載置することで、被覆筒の上端開口縁と上筒体とにより、シール材が上下方向に圧縮変形し、被覆筒の上端開口縁と上筒体との間がシールされる。これにより、例えば人孔内に作業者が入り込んで、被覆筒の上端開口縁と上筒体との間にシール材を配設する必要が無く、シール作業を容易に行うことができる。   In this case, for example, after the sealing material is placed on the upper end opening edge of the coated cylinder, the upper cylinder is placed on the upper surface of the pedestal during the upper cylinder placing step, so that the upper end opening edge and the upper cylinder of the coated cylinder are placed. The sealing material is compressed and deformed in the vertical direction by the body, and the gap between the upper end opening edge of the covering cylinder and the upper cylinder is sealed. Thereby, for example, an operator enters the human hole and there is no need to dispose a sealing material between the upper end opening edge of the covering cylinder and the upper cylinder, and the sealing work can be easily performed.

本発明によれば、地上から上筒体に加えられた荷重が、下筒体に伝わるのを抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the load added to the upper cylinder from the ground is transmitted to a lower cylinder.

本発明の第１実施形態に係る人孔の縦断面図である。It is a longitudinal cross-sectional view of the human hole which concerns on 1st Embodiment of this invention. 図１に示す人孔のうち、上筒体を載置する前の状態を示す図である。It is a figure which shows the state before mounting an upper cylinder among the human holes shown in FIG. 図１に示す人孔の変形例を示す図である。It is a figure which shows the modification of the human hole shown in FIG. 本発明の第２実施形態に係る人孔の縦断面図である。It is a longitudinal cross-sectional view of the human hole which concerns on 2nd Embodiment of this invention. 図４に示す人孔の変形例を示す図である。It is a figure which shows the modification of the human hole shown in FIG. 図４に示す人孔の他の変形例を示す図である。It is a figure which shows the other modification of the human hole shown in FIG.

（第１実施形態）
以下、図１および図２を参照し、本発明の第１実施形態に係る人孔１について説明する。
人孔１は、地中に埋設され、上下方向に延びる筒状の下筒体１０と、下筒体１０上に配設され、地面Ｇに開口する上端開口部が蓋体（不図示）によって閉塞される上筒体２０と、を備えている。
以下の説明において、上下方向から見た平面視で、上筒体２０の上端部における中心軸線Ｏと直交する方向を径方向といい、中心軸線Ｏ周りに周回する方向を周方向という。 (First embodiment)
Hereinafter, the human hole 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
The human hole 1 is embedded in the ground and has a cylindrical lower cylinder 10 extending in the vertical direction, and is disposed on the lower cylinder 10, and an upper end opening that opens to the ground G is formed by a lid (not shown). And an upper cylinder 20 to be closed.
In the following description, the direction perpendicular to the central axis O at the upper end portion of the upper cylindrical body 20 in a plan view viewed from the top and bottom is referred to as the radial direction, and the direction around the central axis O is referred to as the circumferential direction.

図１に示すように、上筒体２０は、縦断面視において、内周面の中心が、外周面の中心よりも径方向のうちの一方側に偏心している環状の頂版２１と、頂版２１の上面に載置され、上端部が下端部よりも縮径された筒状の斜壁部２２と、斜壁部２２の上端部上に載置された調整部材２３と、調整部材２３上に載置された蓋受け枠２４と、を備えている。
頂版２１の上面における開口周縁部には、下方に向けて窪み、かつ全周にわたって延びる凹部２５が形成されている。凹部２５は径方向の内側に向けて開口している。凹部２５内に、中間スラブ２６が設置されている。 As shown in FIG. 1, the upper cylindrical body 20 includes an annular top plate 21 in which the center of the inner peripheral surface is eccentric to the one side in the radial direction from the center of the outer peripheral surface in the longitudinal sectional view, and the top A cylindrical inclined wall portion 22 placed on the upper surface of the plate 21 and having an upper end portion whose diameter is smaller than that of the lower end portion, an adjustment member 23 placed on the upper end portion of the inclined wall portion 22, and an adjustment member 23 And a lid receiving frame 24 placed thereon.
A concave portion 25 that is recessed downward and extends over the entire circumference is formed in the opening peripheral edge portion of the top surface of the top plate 21. The recess 25 opens toward the inside in the radial direction. An intermediate slab 26 is installed in the recess 25.

斜壁部２２は、頂版２１上に載置される下壁部２２Ａと、下壁部２２Ａ上に載置される中間壁部２２Ｂと、中間壁部２２Ｂ上に載置される上壁部２２Ｃと、を備えている。図示の例では、下壁部２２Ａ、中間壁部２２Ｂ、および上壁部２２Ｃはそれぞれ、別体に形成され、外周面に配設された固定部材（図示せず）により、互いに固定されている。なお、前記固定方法については特に限定されない。下壁部２２Ａ、中間壁部２２Ｂ、および下壁部２２Ａは一体に形成されてもよい。これらはモルタルやコンクリートでできているが、樹脂やＦＲＰなどの複合材からできていてもよい。   The inclined wall portion 22 includes a lower wall portion 22A placed on the top plate 21, an intermediate wall portion 22B placed on the lower wall portion 22A, and an upper wall portion placed on the intermediate wall portion 22B. 22C. In the illustrated example, the lower wall portion 22A, the intermediate wall portion 22B, and the upper wall portion 22C are each formed separately and fixed to each other by a fixing member (not shown) disposed on the outer peripheral surface. . The fixing method is not particularly limited. The lower wall portion 22A, the intermediate wall portion 22B, and the lower wall portion 22A may be integrally formed. These are made of mortar or concrete, but may be made of a composite material such as resin or FRP.

下壁部２２Ａの内周面の中心は、頂版２１の内周面の中心と同軸上に配置されている。また、下壁部２２Ａの内径と頂版２１の内径とが互いに一致している。このため、下壁部２２Ａおよび頂版２１それぞれの内周面は、上下方向に面一に連なっている。下壁部２２Ａは、上下方向の全長にわたって、外径および内径がそれぞれ同一寸法で形成された円筒形状をなしている。
中間壁部２２Ｂは、上方に向かうに従い漸次、外径および内径が縮径している。図示の例では、中間壁部２２Ｂのうち、径方向のうちの他方側に位置する部分の外径および内径が、上方に向かうに従い漸次、縮径している。なお、中間壁部２２Ｂは、径方向の両側が、上方に向かうに従い漸次、縮径していてもよいし、縮径せず、上下方向の全域にわたって同一径の円筒形状であってもよい。 The center of the inner peripheral surface of the lower wall portion 22 </ b> A is disposed coaxially with the center of the inner peripheral surface of the top plate 21. Further, the inner diameter of the lower wall portion 22A and the inner diameter of the top plate 21 coincide with each other. For this reason, the inner peripheral surfaces of the lower wall portion 22A and the top plate 21 are continuous in the vertical direction. The lower wall portion 22A has a cylindrical shape in which the outer diameter and the inner diameter are formed with the same dimension over the entire length in the vertical direction.
The intermediate wall portion 22B is gradually reduced in outer diameter and inner diameter as it goes upward. In the illustrated example, the outer diameter and the inner diameter of the portion located on the other side in the radial direction in the intermediate wall portion 22B are gradually reduced in diameter toward the upper side. The intermediate wall portion 22B may be gradually reduced in diameter as both sides in the radial direction are directed upward, or may be a cylindrical shape having the same diameter throughout the entire vertical direction without being reduced in diameter.

中間壁部２２Ｂの上端開口縁には、下方に向けて窪み、かつ全周にわたって延びる凹部２５が形成されている。凹部２５は径方向の内側に向けて開口している。凹部２５内には、中間スラブを設置可能となっている。
上壁部２２Ｃは、上下方向の全長にわたって、外径および内径がそれぞれ同一寸法で形成されている。上壁部２２Ｃの上端開口縁には、下方に向けて窪み、かつ全周にわたって延びる凹部２５が形成されている。凹部２５は径方向の内側に向けて開口している。凹部２５内には、中間スラブを設置可能となっている。上壁部２２Ｃの上下方向の大きさにより、蓋受け枠２４の地面Ｇに対するおおまかな高さを調整する。 A concave portion 25 that is recessed downward and extends over the entire circumference is formed in the upper end opening edge of the intermediate wall portion 22B. The recess 25 opens toward the inside in the radial direction. An intermediate slab can be installed in the recess 25.
The upper wall portion 22C is formed with the same outer diameter and inner diameter over the entire length in the vertical direction. A concave portion 25 that is recessed downward and extends over the entire circumference is formed in the upper end opening edge of the upper wall portion 22C. The recess 25 opens toward the inside in the radial direction. An intermediate slab can be installed in the recess 25. The approximate height of the lid receiving frame 24 with respect to the ground G is adjusted according to the vertical size of the upper wall portion 22C.

調整部材２３は、蓋受け枠２４の地面Ｇに対する高さを微調整するための部材であり、周方向に間隔をあけて複数配設されている。複数の調整部材２３それぞれにおける径方向の外側を向く外面、および径方向の内側を向く内面は、上壁部２２Ｃの外周面および内周面と、それぞれ面一となっている。
蓋受け枠２４は上面視で円形状をなし、中心軸線Ｏ１と同軸上に配置されている。蓋受け枠２４の内周面と調整部材２３の内面とが、面一となっている。蓋受け枠２４の上端開口は地面Ｇに開口している。蓋受け枠２４の上端開口縁には、蓋体が収容される蓋収容部２４Ａが形成されている。 The adjustment member 23 is a member for finely adjusting the height of the lid receiving frame 24 with respect to the ground G, and a plurality of adjustment members 23 are arranged at intervals in the circumferential direction. An outer surface facing the outer side in the radial direction and an inner surface facing the inner side in the radial direction in each of the plurality of adjusting members 23 are flush with the outer peripheral surface and the inner peripheral surface of the upper wall portion 22C.
The lid receiving frame 24 has a circular shape when viewed from above, and is arranged coaxially with the central axis O1. The inner peripheral surface of the lid receiving frame 24 and the inner surface of the adjustment member 23 are flush with each other. The upper end opening of the lid receiving frame 24 opens to the ground G. A lid housing portion 24 </ b> A for housing the lid is formed at the upper opening edge of the lid receiving frame 24.

本実施形態では、人孔１は、下筒体１０の内周面を覆い、上端部が下筒体１０から上方に突出する被覆筒３０と、被覆筒３０の上部における径方向の外側に配設された介在層４０と、介在層４０の上面に載置され、被覆筒３０の上端部を径方向の外側から囲繞する環状の台座５０と、を備えている。被覆筒３０、介在層４０、および台座５０は、互いに同軸上に配置されている。   In the present embodiment, the human hole 1 covers the inner peripheral surface of the lower cylinder body 10, and the upper end portion of the manhole 1 is disposed on the outer side in the radial direction at the upper portion of the covering cylinder 30. The intervening layer 40 is provided, and an annular pedestal 50 that is placed on the upper surface of the intervening layer 40 and surrounds the upper end portion of the covering cylinder 30 from the outside in the radial direction. The covering cylinder 30, the intervening layer 40, and the pedestal 50 are arranged coaxially with each other.

被覆筒３０は、例えばＦＲＰなどの繊維強化樹脂等からなる円筒体である。被覆筒３０は、下筒体１０と同軸上に配設されている。被覆筒３０は、下筒体１０の内周面と径方向に隙間をあけて配設されている。被覆筒３０の外周面と下筒体１０の内周面との間の径方向の隙間には、例えばモルタル材等の充填材３１が充填されている。被覆筒３０は、上下方向の全長にわたって、外径および内径がそれぞれ同一寸法となっている。被覆筒３０は、耐食性に優れた材料により形成されている。   The covering cylinder 30 is a cylindrical body made of, for example, a fiber reinforced resin such as FRP. The covering cylinder 30 is disposed coaxially with the lower cylinder 10. The covering cylinder 30 is disposed with a gap in the radial direction with respect to the inner peripheral surface of the lower cylinder 10. The radial gap between the outer peripheral surface of the covering cylinder 30 and the inner peripheral surface of the lower cylinder 10 is filled with a filler 31 such as a mortar material. The outer diameter and the inner diameter of the covering cylinder 30 are the same over the entire length in the vertical direction. The covering cylinder 30 is formed of a material having excellent corrosion resistance.

介在層４０は、土砂および砕石により流動可能に形成されている。図示の例では、介在層４０は上下方向に２層をなしており、下側に位置する土砂層４１が周囲の土砂と一体に形成され、土砂層４１の上側に位置する砕石層４２は、土砂層４１よりも粒度の大きい砕石により形成されている。土砂層４１および砕石層４２はそれぞれ、被覆筒３０の外周面に当接している。   The intervening layer 40 is formed to be flowable by earth and sand and crushed stone. In the illustrated example, the intervening layer 40 has two layers in the vertical direction, the earth and sand layer 41 located below is formed integrally with the surrounding earth and sand, and the crushed stone layer 42 located above the earth and sand layer 41 includes: It is formed of crushed stone having a larger particle size than the earth and sand layer 41. The earth and sand layer 41 and the crushed stone layer 42 are in contact with the outer peripheral surface of the covering cylinder 30.

土砂層４１および砕石層４２は、被覆筒３０の周囲の所定範囲において、上下方向から見た平面視で下筒体１０を覆う大きさに形成されている。図示の例では、砕石層４２は環状をなしている。土砂層４１の上下方向の厚さは、砕石層４２よりも大きくなっている。なお、土砂層４１の組成を、周囲の土砂の組成と異ならせてもよい。このような場合には、土砂層４１を砕石層４２と同等の大きさの環状に形成してもよい。
前述のように、介在層４０を粒度の大きな材料を上側にして配設することにより、粒度の小さな材料を上側に配設するような構成と比較して、台座５０に上筒体２０の荷重がかかった際に、台座５０の沈下量を抑えることができる。 The earth and sand layer 41 and the crushed stone layer 42 are formed in a predetermined range around the covering cylinder 30 so as to cover the lower cylinder 10 in a plan view as viewed from above and below. In the illustrated example, the crushed stone layer 42 has an annular shape. The thickness of the earth and sand layer 41 is larger than that of the crushed stone layer 42. The composition of the earth and sand layer 41 may be different from the composition of the surrounding earth and sand. In such a case, the earth and sand layer 41 may be formed in an annular shape having the same size as the crushed stone layer 42.
As described above, the load of the upper cylinder 20 on the pedestal 50 is compared with the configuration in which the intervening layer 40 is disposed with the material having a large particle size on the upper side, and the material having a small particle size is disposed on the upper side. When this occurs, the amount of sinking of the pedestal 50 can be suppressed.

台座５０は、被覆筒３０と同軸上に配設されている。台座５０は介在層４０のうち、砕石層４２の上面に載置されている。台座５０の径方向の大きさは、砕石層４２よりも小さくなっている。換言すると、台座５０の外周面は、砕石層４２の外周面よりも径方向の内側に位置している。台座５０の内径は、被覆筒３０の外径よりも大きく、下筒体１０の内径と同一の寸法になっている。
台座５０の内周面は、被覆筒３０の外周面と、径方向に隙間を空けて対向している。台座５０の上端部は、被覆筒３０の上端部よりも上方に突出している。台座５０の上面に、上筒体２０が載置されている。図示の例では、上筒体２０の頂版２１が、台座５０の上面に載置されている。なお、台座５０の内径は、下筒体１０の内径と同一の寸法にする必要はない。台座５０の位置決めを容易にしたり、被覆筒３０へ干渉するおそれをなくしたりするためには、台座５０の内径が下筒体１０の内径と同一かそれ以上であることが好ましい。 The pedestal 50 is disposed coaxially with the covering cylinder 30. The pedestal 50 is placed on the upper surface of the crushed stone layer 42 in the intervening layer 40. The size of the base 50 in the radial direction is smaller than that of the crushed stone layer 42. In other words, the outer peripheral surface of the pedestal 50 is positioned more radially inward than the outer peripheral surface of the crushed stone layer 42. The inner diameter of the pedestal 50 is larger than the outer diameter of the covering cylinder 30 and has the same dimensions as the inner diameter of the lower cylinder body 10.
The inner peripheral surface of the pedestal 50 is opposed to the outer peripheral surface of the covering cylinder 30 with a gap in the radial direction. The upper end portion of the pedestal 50 projects upward from the upper end portion of the covering cylinder 30. The upper cylindrical body 20 is placed on the upper surface of the pedestal 50. In the illustrated example, the top plate 21 of the upper cylindrical body 20 is placed on the upper surface of the pedestal 50. The inner diameter of the pedestal 50 need not be the same size as the inner diameter of the lower cylinder 10. In order to facilitate positioning of the pedestal 50 or eliminate the possibility of interference with the covered cylinder 30, the inner diameter of the pedestal 50 is preferably equal to or greater than the inner diameter of the lower cylinder body 10.

被覆筒３０の上端部と、上筒体２０の下端部と、の間には、上下方向の隙間が設けられている。この隙間には、弾性変形可能なシール材６０が上下方向に圧縮変形された状態で配設されている。シール材６０は、独立気泡スポンジ６１と、独立気泡スポンジ６１の上面に塗布された接着性を備えたシール部材６２（図２参照）と、により形成されている。独立気泡スポンジ６１の下面は、接着剤により、被覆筒３０の上端開口縁に接着されている。シール部材６２は、上筒体２０における頂版２１の下面に接着されている。
なお、シール材６０としては、例えば合成樹脂材料やその他の材料であってもよいし、上下方向に圧縮変形されることなく、前記隙間に配設されてもよい。 A gap in the vertical direction is provided between the upper end portion of the covering cylinder 30 and the lower end portion of the upper cylinder body 20. In this gap, an elastically deformable sealing material 60 is disposed in a state of being compressed and deformed in the vertical direction. The sealing material 60 is formed by a closed cell sponge 61 and a seal member 62 (see FIG. 2) having adhesiveness applied to the upper surface of the closed cell sponge 61. The lower surface of the closed cell sponge 61 is bonded to the upper end opening edge of the covering cylinder 30 with an adhesive. The seal member 62 is bonded to the lower surface of the top plate 21 in the upper cylindrical body 20.
The sealing material 60 may be, for example, a synthetic resin material or other material, or may be disposed in the gap without being compressed and deformed in the vertical direction.

図１に示すように、台座５０と被覆筒３０との間の径方向の隙間には、間詰材７０が充填されている。間詰材７０は、例えば速硬性のモルタル材により形成されている。間詰材７０は、被覆筒３０と同軸上に配置された環状をなしている。間詰材７０は、頂版２１の下面と、上下方向に隙間を空けて対向している。なお、間詰材７０は、頂版２１の下面と当接していてもよい。   As shown in FIG. 1, a gap material 70 is filled in a radial gap between the base 50 and the covering cylinder 30. The filling material 70 is made of, for example, a fast-curing mortar material. The filling material 70 has an annular shape arranged coaxially with the covering cylinder 30. The filling material 70 is opposed to the lower surface of the top plate 21 with a gap in the vertical direction. Note that the filling material 70 may be in contact with the lower surface of the top plate 21.

次に、以上のように構成された人孔の更生方法について説明する。本実施形態に係る人孔の更生方法としては、地中に埋設され、上下方向に延びる筒状の下筒体１０と、下筒体１０上に配設され、地面Ｇに開口する上端開口部が蓋体によって閉塞された図示しない上筒体と、を備えた既設の人孔に対して行われる方法について説明する。
本実施形態に係る人孔の更生方法は、既設の前記上筒体を、下筒体１０上から撤去する撤去工程と、下筒体１０の内周面を、上端部が下筒体１０から上方に突出した被覆筒３０により覆う被覆工程と、被覆筒３０の上部における径方向の外側に、介在層４０を配設する配設工程と、介在層４０の上面に、被覆筒３０の上端部を径方向の外側から囲繞する環状の台座５０を載置する台座載置工程と、台座５０の上面に、既設の前記上筒体よりも上下方向の長さが短い新たな上筒体２０を載置する上筒体載置工程と、を備えている。 Next, a method for rehabilitating a human hole configured as described above will be described. As a method for rehabilitating a human hole according to the present embodiment, a cylindrical lower cylinder 10 that is buried in the ground and extends in the vertical direction, and an upper end opening that is disposed on the lower cylinder 10 and opens to the ground G The method performed with respect to the existing human hole provided with the upper cylinder body which is obstruct | occluded with the cover body and which is not shown in figure is demonstrated.
The method for rehabilitating a human hole according to the present embodiment includes a removal step of removing the existing upper cylinder body from above the lower cylinder body 10, an inner peripheral surface of the lower cylinder body 10, and an upper end portion from the lower cylinder body 10. A covering step that covers the covering tube 30 that protrudes upward, a disposing step that disposes the intervening layer 40 on the radially outer side of the upper portion of the covering tube 30, and an upper end portion of the covering tube 30 on the upper surface of the intervening layer 40. A pedestal placing step for placing an annular pedestal 50 that surrounds the outside from the outside in the radial direction, and a new upper cylinder 20 that is shorter on the upper surface of the pedestal 50 in the vertical direction than the existing upper cylinder. An upper cylinder placing step for placing.

撤去工程では、まず、既設の人孔の周囲の地面Ｇを掘削する。この際、図２に示すように、上下方向から見た平面視で、下筒体１０よりも所定寸法広い範囲を、下筒体１０の上端開口縁と同じ高さまで掘削する。次に、上筒体２０を撤去する際には、上筒体２０から蓋体を撤去した後に、上筒体２０のうち、蓋受け枠２４、調整部材２３、斜壁部２２、および頂版２１を、この順に撤去する。なお、上筒体２０の一部又は全部を一体のまま一度に撤去してもよい。その後、下筒体１０の内周面を高圧洗浄する。また、下筒体１０の内周面に取付けられた足かけ金物等を撤去する。   In the removal process, first, the ground G around the existing human hole is excavated. At this time, as shown in FIG. 2, a range wider than the lower cylindrical body 10 by a predetermined dimension is excavated to the same height as the upper end opening edge of the lower cylindrical body 10 in a plan view as viewed from above and below. Next, when removing the upper cylinder 20, after removing the lid from the upper cylinder 20, the lid receiving frame 24, the adjusting member 23, the inclined wall portion 22, and the top plate of the upper cylinder 20. 21 is removed in this order. In addition, you may remove a part or all of the upper cylinder 20 at once, with integral. Thereafter, the inner peripheral surface of the lower cylindrical body 10 is subjected to high pressure cleaning. In addition, the footrest hardware attached to the inner peripheral surface of the lower cylinder 10 is removed.

被覆工程では、まず、被覆筒３０を下筒体１０の内部に挿入するように吊り下ろし、被覆筒３０を所定位置で支持固定する。この際、被覆筒３０の外周面と下筒体１０の内周面との間に径方向の隙間を空けた状態で、被覆筒３０の上端部を、下筒体１０から上方に突出させる。次に、被覆筒３０と下筒体１０との間の径方向の隙間に、充填材３１を充填する。充填材３１は、上面が下筒体１０の上端開口縁と同じ高さになるように充填される。   In the covering step, first, the covering cylinder 30 is suspended so as to be inserted into the lower cylinder body 10, and the covering cylinder 30 is supported and fixed at a predetermined position. At this time, the upper end portion of the covering cylinder 30 is protruded upward from the lower cylinder 10 with a radial gap between the outer periphery of the covering cylinder 30 and the inner periphery of the lower cylinder 10. Next, the filler 31 is filled in the radial gap between the covering cylinder 30 and the lower cylinder 10. The filler 31 is filled such that the upper surface is the same height as the upper end opening edge of the lower cylinder 10.

配設工程では、まず、介在層４０のうちの土砂層４１の埋戻し作業として、撤去工程で掘削した領域に、周囲と同じ土砂を土砂層４１の高さに合わせて埋め戻す。次に、土砂層４１の上方に、砕石層４２の配設作業として砕石を配設する。この際、介在層４０の上下方向の厚さとしては、台座５０を介在層４０の上面に載置した際に、台座５０が被覆筒３０の上端開口縁から１５〜２０ｍｍ高くなるように設定するのが好ましい。
台座載置工程では、まず、介在層４０のうちの砕石層４２の上面に台座５０を載置する。次に、台座５０の内周面と、被覆筒３０の外周面との間の径方向の隙間に、間詰材７０を充填する。 In the arranging step, first, as the backfilling operation of the earth and sand layer 41 in the intervening layer 40, the same earth and sand as the surroundings are backfilled in the area excavated in the removing step according to the height of the earth and sand layer 41. Next, the crushed stone is disposed above the earth and sand layer 41 as an operation of disposing the crushed stone layer 42. At this time, the thickness of the intervening layer 40 in the vertical direction is set so that the pedestal 50 is 15 to 20 mm higher than the upper end opening edge of the covering cylinder 30 when the pedestal 50 is placed on the upper surface of the intervening layer 40. Is preferred.
In the pedestal placing step, first, the pedestal 50 is placed on the upper surface of the crushed stone layer 42 in the intervening layer 40. Next, the filling material 70 is filled in the radial gap between the inner peripheral surface of the base 50 and the outer peripheral surface of the covering cylinder 30.

上筒体載置工程では、まず、シール材６０における独立気泡スポンジ６１の下面に接着剤を塗布したうえで、独立気泡スポンジ６１を、被覆筒３０の上端開口縁の全周にわたって配設する。次に、台座５０の上面に新たな上筒体２０における頂版２１を載置する。新たな上筒体２０の上下方向の大きさは、既設の上筒体よりも、介在層４０および台座５０の上下方向の大きさの和と同等分小さくなっている。
なお、独立気泡スポンジ６１を、シール部材６２により上筒体２０における頂版２１の下面に接着したのちに、頂版２１を台座５０の上面に載置してもよい。 In the upper cylinder mounting step, first, an adhesive is applied to the lower surface of the closed cell sponge 61 in the sealing material 60, and then the closed cell sponge 61 is disposed over the entire periphery of the upper end opening edge of the coated tube 30. Next, the top plate 21 in the new upper cylinder 20 is placed on the upper surface of the base 50. The size of the new upper cylinder 20 in the vertical direction is smaller than the existing upper cylinder by an amount equivalent to the sum of the sizes of the intervening layer 40 and the pedestal 50 in the vertical direction.
Note that the top plate 21 may be placed on the top surface of the pedestal 50 after the closed cell sponge 61 is bonded to the bottom surface of the top plate 21 in the upper cylindrical body 20 by the seal member 62.

本実施形態では、被覆筒３０の上端開口縁と、新たな上筒体２０と、によりシール材６０を上下方向に挟み込み圧縮変形させる。これにより、シール材６０における独立気泡スポンジ６１の下面に塗布された接着剤と、接着性を備えたシール部材６２と、により独立気泡スポンジ６１が、被覆筒３０の上端開口縁と、上筒体２０における頂版２１の下面とに圧着される。
その後、頂版２１上に、斜壁部２２、調整部材２３、蓋受け枠２４、および蓋体をこの順に載置し、地面Ｇまで埋戻しを行う。最後に、地面Ｇの路面の修復を行うことで、人孔の更生作業が終了する。なお、調整部材２３はリング体などの成形品であってもよいし、施工現場でモルタルやコンクリートなどを上壁部２２Ｃの上に盛って固めるような構成であってもよい。後者の方が現場での高さ調整がしやすく好ましい。 In the present embodiment, the sealing material 60 is sandwiched in the up-down direction by the upper end opening edge of the covering cylinder 30 and the new upper cylinder 20, and is compressed and deformed. As a result, the closed cell sponge 61 is formed by the adhesive applied to the lower surface of the closed cell sponge 61 in the sealing material 60 and the sealing member 62 having adhesiveness, so that the upper end opening edge of the coated tube 30 and the upper cylinder body are formed. 20 to the lower surface of the top plate 21.
Thereafter, the inclined wall 22, the adjusting member 23, the lid receiving frame 24, and the lid are placed in this order on the top plate 21, and backfilling to the ground G is performed. Finally, by repairing the road surface of the ground G, the rehabilitation work for the human hole is completed. The adjusting member 23 may be a molded product such as a ring body, or may be configured such that mortar, concrete, or the like is piled up and hardened on the upper wall portion 22C at a construction site. The latter is preferable because it is easy to adjust the height on site.

以上説明したように、本実施形態に係る人孔１によれば、下筒体１０の上端部と上筒体２０の下端部との間に、介在層４０が配設されているので、地上から上筒体２０に荷重が加えられると、この荷重が台座５０を介して介在層４０に伝わることとなる。そして、介在層４０が存在することで、前記荷重を分散もしくは吸収することが可能になり、前記荷重が下筒体１０に伝わるのを抑制することができる。   As described above, according to the human hole 1 according to the present embodiment, since the intervening layer 40 is disposed between the upper end portion of the lower cylindrical body 10 and the lower end portion of the upper cylindrical body 20, When a load is applied to the upper cylindrical body 20 from this point, this load is transmitted to the intervening layer 40 via the base 50. The presence of the intervening layer 40 makes it possible to disperse or absorb the load, and to prevent the load from being transmitted to the lower cylinder 10.

下筒体１０の内周面が被覆筒３０により覆われているので、下筒体１０の内周面が、人孔１内の液体や気体等に接するのを防ぐことが可能になり、下筒体１０の内周面が腐食するのを抑えることができる。
さらに、被覆筒３０の上端部が下筒体１０から上方に突出し、この上部における径方向の外側に介在層４０が配設されているので、介在層４０が被覆筒３０によって径方向の内側から支持されることとなり、下筒体１０の上端開口部から下筒体１０の内部に介在層４０が流入するのを防ぐことができる。またこのように、介在層４０が被覆筒３０の径方向の外側に配設されているので、介在層４０に人孔１内の液体や気体等が接するのを抑えることができる。 Since the inner peripheral surface of the lower cylindrical body 10 is covered with the covering cylinder 30, it is possible to prevent the inner peripheral surface of the lower cylindrical body 10 from coming into contact with the liquid or gas in the human hole 1. Corrosion of the inner peripheral surface of the cylindrical body 10 can be suppressed.
Further, since the upper end portion of the covering cylinder 30 protrudes upward from the lower cylinder 10 and the intervening layer 40 is disposed on the outer side in the radial direction at the upper part, the interposing layer 40 is formed by the covering cylinder 30 from the inner side in the radial direction. It will be supported and it can prevent that the intervening layer 40 flows into the inside of the lower cylinder 10 from the upper-end opening part of the lower cylinder 10. FIG. In addition, since the intervening layer 40 is disposed on the outer side in the radial direction of the covering cylinder 30 in this way, it is possible to prevent the liquid or gas in the human hole 1 from coming into contact with the intervening layer 40.

被覆筒３０の上端部と、上筒体２０の下端部と、の間には、上下方向の隙間が設けられ、前記隙間には、弾性変形可能なシール材６０が配設されているので、地上からの振動、又は地震の揺れが、上筒体２０および下筒体１０に加えられたり、地盤の沈下が生じたりすることで、上筒体２０および下筒体１０の上下方向の相対的な位置が変位した場合であっても、この変位に追従してシール材６０が弾性変形することで、被覆筒３０と上筒体２０との間のシール性を維持することができる。   Between the upper end of the covering cylinder 30 and the lower end of the upper cylinder 20, a vertical gap is provided, and an elastically deformable sealing material 60 is disposed in the gap. The vibration from the ground or the shaking of the earthquake is applied to the upper cylindrical body 20 and the lower cylindrical body 10 or the ground subsidence occurs, so that the upper cylindrical body 20 and the lower cylindrical body 10 are relative to each other in the vertical direction. Even when the position is displaced, the sealing property between the covering cylinder 30 and the upper cylinder 20 can be maintained by elastically deforming the sealing material 60 following the displacement.

台座５０と被覆筒３０と間の径方向の隙間には、間詰材７０が充填されているので、台座５０の内径および被覆筒３０の外径の寸法精度を高くする必要が無く、台座５０および被覆筒３０の加工を容易に行うことができる。
本実施形態に係る人孔の更生方法によれば、配設工程の前の被覆工程時に、被覆筒３０の上端部を下筒体１０から突出させているので、配設工程時に、被覆筒３０の上端部により、介在層４０を径方向の内側から支持することが可能になる。このため、下筒体１０の上端開口部から、下筒体１０の内部に介在層４０が流入するのを防ぐことができ、配設工程を容易に行うことができる。 Since the gap 70 in the radial direction between the pedestal 50 and the covering cylinder 30 is filled with the filling material 70, it is not necessary to increase the dimensional accuracy of the inner diameter of the pedestal 50 and the outer diameter of the covering cylinder 30, and the pedestal 50 And processing of the covering cylinder 30 can be performed easily.
According to the human hole rehabilitation method according to the present embodiment, since the upper end portion of the covering cylinder 30 is protruded from the lower cylinder body 10 during the covering process before the disposing process, the covering cylinder 30 is disposed during the disposing process. It becomes possible to support the intervening layer 40 from the inner side in the radial direction by the upper end portion. For this reason, it can prevent that the intervening layer 40 flows in into the inside of the lower cylinder 10 from the upper end opening part of the lower cylinder 10, and can perform an arrangement | positioning process easily.

また、上筒体載置工程時に、被覆筒３０の上端開口縁と、新たな上筒体２０と、により弾性変形可能なシール材６０を、上下方向に挟み込み圧縮変形させるので、例えば被覆筒３０の上端開口縁にシール材６０を載置した後に、上筒体載置工程時に、台座５０の上面に上筒体２０を載置することで、被覆筒３０の上端開口縁と上筒体２０とにより、シール材６０が上下方向に圧縮変形し、被覆筒３０の上端開口縁と上筒体２０との間がシールされる。
これにより、例えば人孔１内に作業者が入り込んで、被覆筒３０の上端開口縁と上筒体２０との間にシール材６０を配設する必要が無く、シール作業を容易に行うことができる。 Moreover, since the sealing material 60 which can be elastically deformed by the upper end opening edge of the covering cylinder 30 and the new upper cylinder 20 is sandwiched in the vertical direction and compressed and deformed during the upper cylinder mounting step, for example, the covering cylinder 30 After the sealing material 60 is placed on the upper end opening edge of the upper cylinder body, the upper cylinder body 20 is placed on the upper surface of the pedestal 50 during the upper cylinder body placing step, so that the upper end opening edge of the covering cylinder 30 and the upper cylinder body 20 are placed. As a result, the sealing material 60 is compressed and deformed in the vertical direction, and the gap between the upper end opening edge of the covering cylinder 30 and the upper cylinder 20 is sealed.
Thereby, for example, an operator enters the human hole 1, and it is not necessary to dispose the sealing material 60 between the upper end opening edge of the covering cylinder 30 and the upper cylinder 20, and the sealing work can be easily performed. it can.

（第２実施形態）
以下、図４を参照し、本発明の第２実施形態に係る人孔２について説明する。
なお、本実施形態においては、第１実施形態における構成要素と同一の構成については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。 (Second Embodiment)
Hereinafter, with reference to FIG. 4, the human hole 2 which concerns on 2nd Embodiment of this invention is demonstrated.
In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different points will be described.

図４に示すように、本実施形態に係る人孔２では、台座５０と被覆筒３０との間の径方向の隙間には、水膨張性を備えた止水材８０が配設されている。止水材８０として、水分を含むことで膨張する水膨張性のスポンジを採用することができる。図示の例では、止水材８０は、水膨張性ウレタンフォームとなっている。
止水材８０は、上筒体載置工程時に台座５０と被覆筒３０との間の径方向の隙間に配設される。 As shown in FIG. 4, in the human hole 2 according to the present embodiment, a water stop material 80 having water expandability is disposed in the radial gap between the base 50 and the covering cylinder 30. . As the water stop material 80, a water-expandable sponge that expands by containing moisture can be used. In the illustrated example, the water stop material 80 is a water-expandable urethane foam.
The water blocking material 80 is disposed in the radial gap between the base 50 and the covering cylinder 30 during the upper cylinder placing process.

止水材８０は、台座５０の内周面、および被覆筒３０の外周面に、接着されることなく配設されている。このように、止水材８０が、台座５０と被覆筒３０との間の径方向の隙間に配設されているので、本実施形態に係る人孔２では、被覆筒３０の上端部と、上筒体２０の下端部と、の間の上下方向の隙間に、シール材６０が配設されていない。
また本実施形態に係る人孔２では、台座５０と被覆筒３０との間の径方向の隙間に間詰材７０が充填されていない。 The water blocking material 80 is disposed on the inner peripheral surface of the base 50 and the outer peripheral surface of the covering cylinder 30 without being bonded. Thus, since the water stop material 80 is arrange | positioned in the radial gap between the base 50 and the covering cylinder 30, in the human hole 2 which concerns on this embodiment, the upper end part of the covering cylinder 30; The sealing material 60 is not disposed in the vertical gap between the lower end portion of the upper cylindrical body 20.
Further, in the human hole 2 according to the present embodiment, the filling material 70 is not filled in the radial gap between the base 50 and the covering cylinder 30.

以上説明したように、本実施形態に係る人孔２によれば、台座５０と被覆筒３０との間の径方向の隙間に、水膨張性を備えた止水材８０が配設されている。このため、止水材８０が被覆筒３０の内側から径方向の隙間に進入した水や、台座５０の上下方向又は径方向の外側から、台座５０の内側に侵入した水を含むことで膨張し、台座５０の内周面と、被覆筒３０の外周面と、の間に径方向に圧縮変形されることで、止水材８０がシール性を発揮することができる。よって、台座５０の内径および被覆筒３０の外径の寸法精度を高くする必要が無い。
また、止水材８０が、台座５０と被覆筒３０との間の径方向の隙間に配設されていることから、仮に地面の沈下等により、台座５０および被覆筒３０が、上下方向に相対変位した場合であっても、止水材８０が過度に圧縮変形して押しつぶされることがなく、止水材８０によるシール性を確実に維持することができる。 As described above, according to the human hole 2 according to the present embodiment, the water stop material 80 having water expandability is disposed in the radial gap between the base 50 and the covering cylinder 30. . For this reason, the water stop material 80 expands by including water that has entered the radial gap from the inside of the covering cylinder 30 and water that has entered the inside of the pedestal 50 from the vertical direction or radial outside of the pedestal 50. The waterstop material 80 can exhibit sealing properties by being radially deformed between the inner peripheral surface of the base 50 and the outer peripheral surface of the covering cylinder 30. Therefore, it is not necessary to increase the dimensional accuracy of the inner diameter of the base 50 and the outer diameter of the covering cylinder 30.
Further, since the water stop material 80 is disposed in the radial gap between the pedestal 50 and the covering cylinder 30, the pedestal 50 and the covering cylinder 30 are relatively moved in the vertical direction due to ground subsidence or the like. Even if it is displaced, the water-stopping material 80 is not excessively deformed and crushed, and the sealing performance by the water-stopping material 80 can be reliably maintained.

また、止水材８０が水膨張性によりシール性を発揮するため、台座５０と被覆筒３０との間の径方向の隙間の大きさが、周方向の位置により仮にばらつく場合であっても、前記隙間を止水材８０の膨張により確実にシールすることが可能になる。これにより、台座５０および被覆筒３０の寸法管理を容易に行うことができる。
また、止水材８０が台座５０の内周面、および被覆筒３０の外周面に対して接着されることなく当接していることから、例えば止水材８０が台座５０の内周面、および被覆筒３０の外周面に接着されている構成と異なり、仮に地上からの振動、又は地震の揺れが、止水材８０に加えられたとしても、止水材８０のうち、台座５０の内周面、および被覆筒３０の外周面との当接部分の接着が剥がれて隙間が生じるようなことが無く、台座５０と被覆筒３０との間の径方向の隙間を確実にシールすることができる。
また、台座５０と被覆筒３０との間の径方向の隙間に配設した止水材８０が水分を含むことで、この止水材８０にシール性を発揮させることができるので、例えば止水材８０を、台座５０の内周面、および被覆筒３０の外周面に接着することでシール性を発揮させる構成と比較して、止水材８０の配設作業を容易に行うことができる。 In addition, since the water-stopping material 80 exhibits sealability due to water expansion, even if the size of the radial gap between the base 50 and the covering cylinder 30 varies depending on the position in the circumferential direction, The gap can be reliably sealed by the expansion of the water stop material 80. Thereby, the dimension management of the base 50 and the covering cylinder 30 can be performed easily.
Further, since the water stop material 80 is in contact with the inner peripheral surface of the pedestal 50 and the outer peripheral surface of the covering cylinder 30 without being bonded, for example, the water stop material 80 is connected to the inner peripheral surface of the pedestal 50, and Unlike the structure bonded to the outer peripheral surface of the covering cylinder 30, even if a vibration from the ground or an earthquake is applied to the water stop material 80, the inner periphery of the pedestal 50 among the water stop material 80. The gap between the contact surface and the outer peripheral surface of the covering cylinder 30 is not peeled off and a gap is not generated, and the radial gap between the base 50 and the covering cylinder 30 can be reliably sealed. .
Moreover, since the water stop material 80 arrange | positioned in the radial gap between the base 50 and the covering cylinder 30 contains water | moisture content, since this water stop material 80 can exhibit sealing performance, water stop, for example Compared with the configuration in which the sealing performance is exhibited by adhering the material 80 to the inner peripheral surface of the pedestal 50 and the outer peripheral surface of the covering cylinder 30, it is possible to easily perform the disposing operation of the water blocking material 80.

なお、本発明の技術的範囲は前記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。   The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば、図３に示すように、上記第１実施形態に係る人孔１の変形例では、人孔１Ｂの上筒体２０が、頂版２１を備えていない。また、上筒体２０における斜壁部２２が、下壁部２２Ａを備えていない。このような構成を採用することで、人孔１を上下方向および径方向にコンパクトな構成とすることができる。   For example, as shown in FIG. 3, in the modified example of the human hole 1 according to the first embodiment, the upper cylindrical body 20 of the human hole 1 </ b> B does not include the top plate 21. Further, the inclined wall portion 22 in the upper cylindrical body 20 does not include the lower wall portion 22A. By adopting such a configuration, the human hole 1 can be configured to be compact in the vertical direction and the radial direction.

また、図５および図６に示すように、上記第２実施形態に係る人孔２の変形例では、人孔２Ｂ、２Ｃにおける台座５０と被覆筒３０との間の径方向の隙間に、間詰材７０が充填されている。間詰材７０は、例えば速硬性のモルタル材により形成されている。間詰材７０は、被覆筒３０と同軸上に配置された環状をなしている。間詰材７０は、図５に示すように止水材８０の下方に充填してもよいし、図６に示すように、止水材８０の上方に充填してもよい。   Further, as shown in FIGS. 5 and 6, in the modification of the human hole 2 according to the second embodiment, the radial gap between the base 50 and the covering cylinder 30 in the human holes 2 </ b> B and 2 </ b> C Filling material 70 is filled. The filling material 70 is made of, for example, a fast-curing mortar material. The filling material 70 has an annular shape arranged coaxially with the covering cylinder 30. The filling material 70 may be filled below the water stop material 80 as shown in FIG. 5, or may be filled above the water stop material 80 as shown in FIG.

また、上記各実施形態においては、頂版２１の上面における開口周縁部に凹部２５が形成され、凹部２５内に中間スラブ２６を設置した構成を示したが、このような態様に限られない。頂版２１に凹部２５を形成せず、中間スラブ２６を設置しなくてもよい。
また、上記各実施形態においては、被覆筒３０の上端部と、上筒体２０の下端部と、の間に、上下方向の隙間が設けられ、この隙間に、弾性変形可能なシール材６０が配設されている構成を示したが、このような態様に限られない。シール材６０は上下方向に圧縮変形されることなく、被覆筒３０の上端部と、上筒体２０の下端部と、の間の上下方向の隙間に配設されてもよい。また、シール材６０が前記隙間に配設されなくてもよい。 Moreover, in each said embodiment, although the recessed part 25 was formed in the opening peripheral part in the upper surface of the top plate 21, and the intermediate | middle slab 26 was installed in the recessed part 25 was shown, it is not restricted to such an aspect. The recess 25 is not formed in the top plate 21 and the intermediate slab 26 may not be installed.
Further, in each of the above embodiments, a vertical gap is provided between the upper end portion of the covering cylinder 30 and the lower end portion of the upper cylindrical body 20, and the elastically deformable sealing material 60 is provided in this gap. Although the arrangement | positioning arrange | positioned was shown, it is not restricted to such an aspect. The sealing material 60 may be disposed in a gap in the vertical direction between the upper end portion of the covering cylinder 30 and the lower end portion of the upper cylindrical body 20 without being compressed and deformed in the vertical direction. Further, the sealing material 60 may not be disposed in the gap.

また、上記第１実施形態においては、台座５０と被覆筒３０との間の径方向の隙間に、間詰材７０が充填されている構成を示したが、このような態様に限られない。台座５０と被覆筒３０との間の径方向の隙間に、間詰材７０が充填されなくてもよい。   Moreover, in the said 1st Embodiment, although the structure where the gap | interval of the radial direction between the base 50 and the covering cylinder 30 was filled with the padding material 70 was shown, it is not restricted to such an aspect. The gap material 70 may not be filled in the radial gap between the base 50 and the covering cylinder 30.

また、上記各実施形態においては、人孔の更生方法として、下筒体１０と上筒体２０とを備えた既設の人孔に対して行われる方法について説明したが、このような態様に限られない。人孔の更生方法としては、上端部が下筒体１０から上方に突出する被覆筒３０と、被覆筒３０の上部における径方向の外側に配設された介在層４０と、介在層４０の上面に載置された台座５０と、を備えた人孔１を新設する作業として行ってもよい。
また、上記各実施形態においては、人孔の更生方法として、既設の下筒体１０を撤去せず、再利用する方法を説明したが、既設の下筒体１０を撤去して新しい下筒体１０を設置してもよい。この場合であっても上筒体２０の荷重が下筒体１０に伝わるのを抑制することができる。これにより、下筒体１０の耐久性を容易に確保することができる。さらに下筒体１０の耐久性が確保されることで、下筒体１０の強度劣化を考慮する負担を抑えることができ、設計がより簡単になる。 In each of the above embodiments, as a method for rehabilitating a human hole, a method performed on an existing human hole including the lower cylinder body 10 and the upper cylinder body 20 has been described. I can't. As a method for rehabilitating the human hole, a covering cylinder 30 whose upper end projects upward from the lower cylinder 10, an intervening layer 40 disposed on the outer side in the radial direction at the upper part of the covering cylinder 30, and the upper surface of the intervening layer 40 You may carry out as work which newly installs the human hole 1 provided with the base 50 mounted in this.
Moreover, in each said embodiment, although the existing lower cylinder 10 was not removed, but the method of reusing was demonstrated as a rehabilitation method of a human hole, the existing lower cylinder 10 was removed and a new lower cylinder was removed. 10 may be installed. Even in this case, it is possible to suppress the load of the upper cylinder 20 from being transmitted to the lower cylinder 10. Thereby, the durability of the lower cylinder 10 can be easily ensured. Furthermore, by ensuring the durability of the lower cylindrical body 10, it is possible to suppress the burden considering the strength deterioration of the lower cylindrical body 10, and the design becomes easier.

その他、本発明の趣旨に逸脱しない範囲で、前記実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、前記した変形例を適宜組み合わせてもよい。   In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

１ 人孔
１０ 下筒体
２０ 上筒体
３０ 被覆筒
５０ 台座
６０ シール材
７０ 間詰材
８０ 止水材 1 Human hole 10 Lower cylinder 20 Upper cylinder 30 Covered cylinder 50 Base 60 Sealing material 70 Filling material 80 Water stop material

Claims (7)

地中に埋設され、上下方向に延びる筒状の下筒体と、
前記下筒体上に配設され、地面に開口する上端開口部が蓋体によって閉塞される上筒体と、を備えた人孔であって、
前記下筒体の内周面を覆い、上端部が前記下筒体から上方に突出する被覆筒と、
前記被覆筒の上部における径方向の外側に配設された介在層と、
前記介在層の上面に載置され、前記被覆筒の上端部を径方向の外側から囲繞する環状の台座と、を備え、
前記上筒体は、前記台座の上面に載置されていることを特徴とする人孔。 A cylindrical lower cylinder embedded in the ground and extending in the vertical direction;
An upper cylinder disposed on the lower cylinder and having an upper end that is open to the ground and closed by a lid, is a human hole,
A covered cylinder that covers an inner peripheral surface of the lower cylinder and whose upper end projects upward from the lower cylinder;
An intervening layer disposed on the outside in the radial direction at the top of the coated cylinder;
An annular pedestal placed on the upper surface of the intervening layer and surrounding the upper end of the coated cylinder from the outside in the radial direction,
The upper cylindrical body is placed on the upper surface of the pedestal. 前記台座と前記被覆筒との間の径方向の隙間には、水膨張性を備えた止水材が配設されていることを特徴とする請求項１に記載の人孔。   The human hole according to claim 1, wherein a water-stopping material having water expandability is disposed in a radial gap between the pedestal and the covering cylinder. 前記被覆筒の上端部と、前記上筒体の下端部と、の間には、上下方向の隙間が設けられ、
前記隙間には、弾性変形可能なシール材が配設されていることを特徴とする請求項１に記載の人孔。 Between the upper end portion of the covering tube and the lower end portion of the upper tube body, a vertical gap is provided,
The human hole according to claim 1, wherein an elastically deformable sealing material is disposed in the gap. 前記台座と前記被覆筒との間の径方向の隙間には、間詰材が充填されていることを特徴とする請求項１から３のいずれか１項に記載の人孔。   The human hole according to any one of claims 1 to 3, wherein a gap between the base and the covering cylinder is filled with a filling material. 地面に開口する上端開口部が蓋体によって閉塞される上筒体を、地中に埋設され、上下方向に延びる筒状の下筒体上から撤去する撤去工程と、
前記下筒体の内周面を、上端部が前記下筒体から上方に突出した被覆筒により覆う被覆工程と、
前記被覆筒の上部における径方向の外側に、介在層を配設する配設工程と、
前記介在層の上面に、前記被覆筒の上端部を径方向の外側から囲繞する環状の台座を載置する台座載置工程と、
前記台座の上面に、前記上筒体よりも上下方向の長さが短い新たな上筒体を載置する上筒体載置工程と、を備えることを特徴とする人孔の更生方法。 A removal step of removing the upper cylindrical body whose upper end opening which is open to the ground is closed by the lid body, from the cylindrical lower cylindrical body embedded in the ground and extending in the vertical direction;
A covering step of covering an inner peripheral surface of the lower cylinder with a covering cylinder having an upper end protruding upward from the lower cylinder;
A disposing step of disposing an intervening layer on the radially outer side of the upper portion of the covering tube;
On the upper surface of the intervening layer, a pedestal placing step of placing an annular pedestal surrounding the upper end portion of the coated cylinder from the outside in the radial direction;
A rehabilitation method for a human hole, comprising: an upper cylinder placing step of placing a new upper cylinder having a shorter vertical length than the upper cylinder on the upper surface of the pedestal. 前記上筒体載置工程時に、前記台座と前記被覆筒との間の径方向の隙間に、水膨張性を備えた止水材を配設することを特徴とする請求項５に記載の人孔の更生方法。   6. The person according to claim 5, wherein a water-stopping material having water expandability is disposed in a radial gap between the pedestal and the covering cylinder at the time of placing the upper cylinder body. How to rehabilitate holes. 前記上筒体載置工程時に、前記被覆筒の上端開口縁と、前記新たな上筒体と、により弾性変形可能なシール材を、上下方向に挟み込み圧縮変形させることを特徴とする請求項５に記載の人孔の更生方法。   6. The sealing material that is elastically deformable by the upper end opening edge of the covering cylinder and the new upper cylinder body is sandwiched in the vertical direction and compressed and deformed in the upper cylinder body placing step. The method for rehabilitation of human holes described in 1.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954340U (en) * 1972-08-14 1974-05-14
JPH1121931A (en) * 1997-06-30 1999-01-26 Haneda Hume Pipe Co Ltd Vibration isolation structure of manhole
JP2005098068A (en) * 2003-09-03 2005-04-14 Norio Otsuga Manhole body and manhole connector
US20140137508A1 (en) * 2010-09-24 2014-05-22 Vincent Bussio Rehabilitation of deteriorated manhole and other sewer structures
JP3198669U (en) * 2015-04-09 2015-07-16 株式会社センタービレッジ Manhole renewal structure and new manhole structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954340U (en) * 1972-08-14 1974-05-14
JPH1121931A (en) * 1997-06-30 1999-01-26 Haneda Hume Pipe Co Ltd Vibration isolation structure of manhole
JP2005098068A (en) * 2003-09-03 2005-04-14 Norio Otsuga Manhole body and manhole connector
US20140137508A1 (en) * 2010-09-24 2014-05-22 Vincent Bussio Rehabilitation of deteriorated manhole and other sewer structures
JP3198669U (en) * 2015-04-09 2015-07-16 株式会社センタービレッジ Manhole renewal structure and new manhole structure

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