JPH10323896A - Regeneration repairing method of already constructed piping - Google Patents
Regeneration repairing method of already constructed pipingInfo
- Publication number
- JPH10323896A JPH10323896A JP9136570A JP13657097A JPH10323896A JP H10323896 A JPH10323896 A JP H10323896A JP 9136570 A JP9136570 A JP 9136570A JP 13657097 A JP13657097 A JP 13657097A JP H10323896 A JPH10323896 A JP H10323896A
- Authority
- JP
- Japan
- Prior art keywords
- existing pipe
- piping
- pipe
- annular member
- existing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Pipe Accessories (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、既設配管の更正修
理工法に関し、さらに詳しくは、不要となった既設配管
内に新しい管を敷設するための工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing and repairing existing pipes, and more particularly to a method for laying new pipes in existing pipes that have become unnecessary.
【0002】[0002]
【従来の技術】地中等に埋設されているガス管、水道管
等の既設配管には、家屋の建て替え等が原因して民地内
に埋設されている状態で放置されるものがあるが、この
ような放置管は、用いられる材質によっては埋設期間が
長期にわたると腐食等による老朽化現象が進行し、漏洩
孔等が生じて地盤沈下の原因となるので、引き抜いて撤
去する必要がある。従来、放置管の引き抜きのための工
法としては、例えば特開平2ー292590号公報や、
特開平3ー9188号公報に示されているように、撤去
対象となる放置引き込み管を導管から切り離して分離し
た後、引き込み管の末端を掘削ピット内に露出させて引
き抜き装置により把持し、この状態で放置引き抜き管を
牽引して土中から引き抜く工法が採用されている。放置
管を引き抜いた後には、今まで埋設されていた箇所に空
洞部が生じ、これが地盤陥没の原因となる場合があるの
で、従来では、その空洞部内にモルタル等を充填して空
洞部を埋めつくしてしまうことが行われている。2. Description of the Related Art Some existing pipes, such as gas pipes and water pipes, buried underground or the like are left buried in private lands due to rebuilding of houses. Depending on the material used, such an abandoned pipe may deteriorate due to corrosion or the like if the burial period is prolonged, causing a leak hole or the like and causing ground subsidence. Conventionally, as a method for pulling out a leftover tube, for example, JP-A-2-292590 or
As shown in Japanese Patent Application Laid-Open No. Hei 3-9-1188, after leaving and leaving a leaving draw pipe to be removed from a conduit, the end of the draw pipe is exposed in a drilling pit and gripped by a pulling device. In this state, a method is used in which the drawn pipe is pulled out of the soil by pulling it. After pulling out the abandoned pipe, a cavity is created in the place where it was buried, and this may cause the ground to collapse, so conventionally, the cavity is filled with mortar etc. to fill the cavity It is being done.
【0003】埋設されて放置されたままの引き込み管を
交換する場合には、一旦埋設されている引き込み管を引
き抜いた後、新しい引き込み管を引き抜き後に生じてい
る空洞部内に引き込むことが行われている。しかし、こ
のような工法には、放置管を引き抜くための牽引作業や
放置管の引き抜き後の空洞部の埋めつくし作業等に多大
な労力や時間が必要となるという不具合がある。In the case of replacing a retracted pipe which has been buried and left as it is, once the buried retractable pipe is withdrawn, a new retractable pipe is retracted into a cavity formed after the withdrawal. I have. However, such a construction method has a drawback that a large amount of labor and time are required for a pulling operation for pulling out the leftover tube and a filling operation of the hollow portion after pulling out the leftover tube.
【0004】一方、近年では、地震等の災害時に鋼管や
鋳鉄管等の金属製の既設配管が破損するのを防止するこ
とが望まれてきている。既設配管の破損を防止するため
の工法としては、既設配管の内面に樹脂ライニングを塗
付し、樹脂ライニングの伸張性を利用して配管の破断を
防止するようにしたり、樹脂ライニングに代えてポリエ
チレン等のようにある程度の伸縮性をもつ樹脂からなる
新たな管を敷設するようにしたものがある。ポリエチレ
ン樹脂製の管を用いる場合には、既設配管を敷設方向に
沿って裁断して拡径した状態でポリエチレン樹脂製の管
(以下、PE管という)を挿入したり、既設配管の内周
面にポリエチレン樹脂を射出することにより樹脂塗膜で
新たな管を形成したり、あるいは、既設配管内にPE管
を挿入したりする工法がある。On the other hand, in recent years, it has been desired to prevent existing metal pipes such as steel pipes and cast iron pipes from being damaged during a disaster such as an earthquake. As a method of preventing damage to the existing piping, a resin lining is applied to the inner surface of the existing piping, and the extensibility of the resin lining is used to prevent the breakage of the piping, or polyethylene is used instead of the resin lining. There is a case in which a new pipe made of a resin having a certain degree of elasticity is laid, as in the above-mentioned case. When a polyethylene resin pipe is used, a pipe made of polyethylene resin (hereinafter referred to as a PE pipe) is inserted in a state where the existing pipe is cut along the laying direction and expanded in diameter, or an inner peripheral surface of the existing pipe is used. There is a construction method of forming a new pipe with a resin coating film by injecting a polyethylene resin into the resin pipe, or inserting a PE pipe into an existing pipe.
【0005】[0005]
【発明が解決しようとする課題】上記PE管を新たな管
として用いる場合の工法には、次のような問題がある。
既設配管を裁断する工法では、裁断するための装置およ
び手順が必要となることで管の代替作業が大げさとな
る。また、ポリエチレン樹脂を射出する工法では、射出
される樹脂の膜厚が一定しないことや乾燥までに時間が
かかるなどの問題がある。さらに既設配管内にPE管を
挿入する工法では、特に、金属管と同等な剛性を持たせ
るために肉厚が厚いPE管を挿入する場合には、PE管
の周方向での撓み量が少ないことに起因して既設配管の
内周面に新たなPE管が接触すると挿入抵抗が大きくな
るので、PE管の外径を既設配管の内径よりも小さくす
ることが必要となる。このため、所定の内径に設定され
ている既設配管でのガス流量に比較して新たに敷設した
ガス管での流量が大きく異なってしまうという問題があ
る。既設配管の内径が比較的大径の場合には、PE管の
外径をある程度小さくしてもガス流量の変化を許容範囲
に収めることが可能であるものの、既設配管の内径が小
径である場合には、PE管の外径の変化が僅かであって
も既設配管の内径により設定されたガス流量が得られな
くなるので、なるべく既設配管との間で寸法上の違いを
小さくすることが望まれる。The method of using the PE pipe as a new pipe has the following problems.
In the method of cutting an existing pipe, an apparatus and a procedure for cutting the pipe are required, so that the replacement work of the pipe is exaggerated. In addition, the method of injecting a polyethylene resin has problems that the thickness of the injected resin is not constant and that it takes time to dry. Furthermore, in the method of inserting a PE pipe into an existing pipe, the amount of bending in the circumferential direction of the PE pipe is small, particularly when a thick PE pipe is inserted to have the same rigidity as a metal pipe. For this reason, when a new PE pipe comes into contact with the inner peripheral surface of the existing pipe, the insertion resistance increases. Therefore, it is necessary to make the outer diameter of the PE pipe smaller than the inner diameter of the existing pipe. For this reason, there is a problem that the flow rate in the newly laid gas pipe is largely different from the gas flow rate in the existing pipe set to a predetermined inner diameter. When the inner diameter of the existing pipe is relatively large, even if the outer diameter of the PE pipe is reduced to some extent, the change in gas flow rate can be kept within the allowable range, but the inner diameter of the existing pipe is small. However, since the gas flow rate set by the inner diameter of the existing pipe cannot be obtained even if the outer diameter of the PE pipe changes slightly, it is desired to reduce the dimensional difference from the existing pipe as much as possible. .
【0006】本発明の目的は、既設配管内にPE管等の
新たな配管を敷設する場合の問題に鑑み、既設配管の内
径寸法に対して極端に小さくなることなく、新たな配管
を容易に既設配管内に敷設することが可能な配管の敷設
工法を提供することにある。SUMMARY OF THE INVENTION In view of the problem of laying a new pipe such as a PE pipe in an existing pipe, an object of the present invention is to easily install a new pipe without extremely reducing the inner diameter of the existing pipe. It is an object of the present invention to provide a method of laying a pipe that can be laid in an existing pipe.
【0007】[0007]
【課題を解決するための手段】この目的を達成するた
め、請求項1記載の発明は、既設配管内に新管を敷設し
て管路を更正する既設配管の更正修理工法において、上
記既設配管内に任意形状からなり、上記既設配管の延長
方向で細分された長さを有する環状部材を挿通し、各環
状部材を上記既設配管の延長方向に連続的に挿入し、上
記延長方向端縁を接合することで一体化するようにした
ことを特徴としている。In order to achieve this object, an invention according to claim 1 is a method for repairing an existing pipe by laying a new pipe in the existing pipe and correcting the pipe. In an arbitrary shape inside, an annular member having a length subdivided in the extension direction of the existing pipe is inserted, and each annular member is inserted continuously in the extension direction of the existing pipe, and the edge in the extension direction is inserted. It is characterized by being integrated by joining.
【0008】請求項2記載の発明は、請求項1記載の既
設配管の更正修理工法において、上記環状部材は、可撓
性を有し、その周方向の一部が切り離され、切り離され
た端部が上記既設配管に挿入される前には上記既設配管
の内径よりも幾分大きな曲率半径に維持されていること
を特徴としている。According to a second aspect of the present invention, in the method for rehabilitating an existing pipe according to the first aspect, the annular member has flexibility, a part of the annular member in the circumferential direction is cut off, and the cut end is cut off. Before the part is inserted into the existing pipe, the radius of curvature is maintained to be somewhat larger than the inner diameter of the existing pipe.
【0009】請求項3記載の発明は、請求項1または2
記載の既設配管の更正修理工法において、上記環状部材
は、ポリエチレン樹脂で構成されていることを特徴とし
ている。The invention described in claim 3 is the first or second invention.
In the method for repairing and repairing existing piping described above, the annular member is made of polyethylene resin.
【0010】請求項4記載の発明は、請求項1記載の既
設配管の更正修理工法において、上記環状部材は、上記
既設配管内に挿通後、延長方向端縁が接合される際、上
記既設配管内に挿入された治具によって押圧されること
を特徴としている。According to a fourth aspect of the present invention, in the method for repairing an existing pipe according to the first aspect, the annular member is inserted into the existing pipe, and when the edge in the extending direction is joined, the existing pipe is connected to the existing pipe. It is characterized by being pressed by a jig inserted therein.
【0011】請求項5記載の発明は、請求項4記載の既
設配管の更正修理工法において、上記治具は、上記既設
配管の外に駆動源を有する牽引部材によって移動した際
に上記環状部材を押圧することを特徴としている。According to a fifth aspect of the present invention, in the method for correcting and repairing an existing pipe according to the fourth aspect, the jig moves the annular member when the jig is moved by a traction member having a drive source outside the existing pipe. It is characterized by pressing.
【0012】請求項6記載の発明は、請求項1乃至5の
うちの一つに記載の既設配管の更正修理工法において、
上記環状部材は、既設配管の形態に合わせてその既設配
管の延長方向で分割されていることを特徴としている。According to a sixth aspect of the present invention, there is provided a method for repairing and repairing an existing pipe according to one of the first to fifth aspects.
The above-mentioned annular member is characterized in that it is divided in the extension direction of the existing pipe according to the form of the existing pipe.
【0013】[0013]
【作用】請求項1記載の発明では、既設配管の延長方向
で細分化された環状部材を延長方向に並列させて並列方
向の端縁を接合することにより、既設配管内に新たな配
管が敷設されることになる。しかも、延長方向で細分化
された環状部材を用いることにより、既設配管内への挿
入が容易となり、さらには細分した際の寸法によっては
既設配管の曲り部等の形態にも対応して配置づけること
ができる。According to the first aspect of the present invention, a new pipe is laid in the existing pipe by joining the annular members divided in the extension direction of the existing pipe in the extension direction and joining the edges in the parallel direction. Will be done. Moreover, by using the annular member subdivided in the extending direction, insertion into the existing pipe becomes easy, and furthermore, depending on the dimensions when subdividing, the pipe is arranged corresponding to the form of the bent part of the existing pipe. be able to.
【0014】請求項2および3記載の発明では、既設配
管内に挿入された環状部材が挿入前の形状から既設配管
内面に密着する形状に変化し、密着した際には反発力を
生起させて既設配管内面に効果的に密着することができ
る。According to the second and third aspects of the present invention, the annular member inserted into the existing pipe changes from a shape before insertion to a shape closely contacting the inner surface of the existing pipe, and when it comes into close contact, a repulsive force is generated. It can effectively adhere to the inner surface of the existing pipe.
【0015】請求項4および5記載の発明では、牽引さ
れて移動することによる押圧動作により環状部材同士の
密着接合が行われる。According to the fourth and fifth aspects of the present invention, the annular members are tightly joined to each other by a pressing operation by being pulled and moved.
【0016】請求項6記載の発明では、既設配管の形態
に合わせて環状部材が装填されるので、既設配管に曲路
が存在していても、その曲路に隙間なく装填できるよう
に分割されて装填される。これにより、既設配管の形態
が如何様な状態であっても、漏洩などの事故を未然に防
いで新たな配管を敷設することができる。According to the sixth aspect of the present invention, since the annular member is loaded according to the shape of the existing pipe, even if the existing pipe has a curved path, the pipe is divided so that the curved path can be loaded without any gap. Loaded. This makes it possible to lay a new pipe while preventing an accident such as leakage, regardless of the state of the existing pipe.
【0017】[0017]
【実施例】以下、図示実施例により本発明の詳細を説明
する。以下に説明する実施例は、既設配管としてガス管
を対象としているが、ガス管に限らず水道管を始めとし
て他の既設配管に適用することも可能であることを前置
しておく。図1において、既設配管1に対してPE管2
を挿入するに際しては、地中に埋設された既設配管1で
構成されている管路の一部を他の管路から切り離してお
く。 この方法として、地面を開削して既設配管1の延
長方向両端をそれぞれ露出させるための作業用ピット
3、4を設け、作業用ピット3、4内で既設配管1の端
部を切断して開口させておく。延長方向両端が開口され
た既設配管1の内部には、PE管2が挿入されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. Although the embodiments described below are directed to gas pipes as existing pipes, it is to be noted that the present invention is not limited to gas pipes, and can be applied to other existing pipes such as water pipes. In FIG. 1, PE pipe 2
When inserting the pipe, a part of the pipeline constituted by the existing piping 1 buried underground is separated from other pipelines. As this method, working pits 3 and 4 for excavating the ground and exposing both ends of the existing pipe 1 in the extending direction are provided, and the ends of the existing pipe 1 are cut and opened in the working pits 3 and 4. Let it be. A PE pipe 2 is inserted into the existing pipe 1 having both ends opened in the extension direction.
【0018】PE管2は、既設配管1中に挿入される新
たな管に相当しており、図2に示すように、既設配管1
の延長方向での長さが既設配管1の長さに対して細分さ
れた環状部材20を連続的に並べることで構成されてい
る。環状部材20は、図3に示すように、外表面に縦横
のリム20A、20Bを有するポリエチレン樹脂の成形
部品であり、図4に示すように、その周方向の一部が切
り離されている。環状部材20は、材質からの特性によ
って可撓性を有しており、周方向で切り離された端部
(以下、分割部という)が、図4において、二点鎖線で
示すように、外側に向け反り返ることができ、既設配管
1の内周面の半径よりも反り返った状態の分割部までの
半径が僅かに大きくなっている。この半径の差は、環状
部材20が既設配管1内に挿入された際に既設配管1の
内面に分割部の外表面が密着できる程度あればよい。The PE pipe 2 corresponds to a new pipe inserted into the existing pipe 1, and as shown in FIG.
Is formed by continuously arranging annular members 20 whose length in the extension direction is subdivided with respect to the length of the existing pipe 1. As shown in FIG. 3, the annular member 20 is a molded part of a polyethylene resin having vertical and horizontal rims 20A and 20B on the outer surface, and a part in the circumferential direction is cut off as shown in FIG. The annular member 20 has flexibility due to characteristics of the material, and an end portion (hereinafter, referred to as a divided portion) separated in a circumferential direction is directed outward as shown by a two-dot chain line in FIG. The radius of the inner pipe of the existing pipe 1 is slightly larger than the radius of the inner pipe of the existing pipe 1. The difference in the radii may be such that the outer surface of the divided portion can be in close contact with the inner surface of the existing pipe 1 when the annular member 20 is inserted into the existing pipe 1.
【0019】環状部材20の軸方向において、少なくと
も、図2中、矢印Aで示す環状部材20の挿入方向前方
側の相当する外周面には、テーパ面21が形成されてい
る。テーパ面21は、環状部材20が既設配管1内に挿
入される際に、反り返っている状態の分割部の変形を容
易化するとともに環状部材20の挿入を容易化するため
の箇所である。テーパ面21を環状部材20の軸方向で
一方側にのみ形成した場合には、環状部材20の挿入時
での向きが限定されて挿入手順が面倒になることもある
ので、このような面倒さをなくす意味で軸方向の両方に
テーパ面を形成するようにしてもよい。但し、この場合
には、テーパ面21における最小外径部と環状部材20
の内径とで形成される肉部の厚さが後述する押圧用治具
に充分接触可能な厚さであることはいうまでもない。In the axial direction of the annular member 20, a tapered surface 21 is formed at least on an outer peripheral surface corresponding to the front side in the insertion direction of the annular member 20 indicated by an arrow A in FIG. The tapered surface 21 is a portion for facilitating the deformation of the warped divided portion and facilitating the insertion of the annular member 20 when the annular member 20 is inserted into the existing pipe 1. If the tapered surface 21 is formed only on one side in the axial direction of the annular member 20, the orientation at the time of insertion of the annular member 20 is limited, and the insertion procedure may be complicated. The tapered surface may be formed in both directions in the axial direction to eliminate the problem. However, in this case, the minimum outer diameter portion on the tapered surface 21 and the annular member 20
It is needless to say that the thickness of the meat portion formed by the inner diameter of the inner wall of the inner wall is sufficient to make contact with a pressing jig described later.
【0020】環状部材20は、既設配管1内に連続的に
挿入されて既設配管1の延長方向に沿って並べられる
が、並べられる際には、図2に示すように、治具22が
用いられる。治具22は、図1において符号R、R’で
示す駆動源によって牽引されるワイヤ23が掛け止めら
れたキャップ状部材であり、その牽引方向(図2中、矢
印Aで示す方向)の上流側端面を環状部材20に対向当
接させる。なお、治具22には、牽引方向上流側だけで
なく、図1に示すように、下流側にも牽引用ワイヤ23
が連結できるようになっている。下流側に連結される牽
引用ワイヤは、環状部材20を既設配管1内に新に挿入
する際に治具22を一旦既設配管1の外部に取り出すた
めに用いられる。The annular members 20 are continuously inserted into the existing pipe 1 and are arranged along the extension direction of the existing pipe 1. When the annular members 20 are arranged, a jig 22 is used as shown in FIG. Can be The jig 22 is a cap-shaped member on which a wire 23 pulled by a drive source indicated by reference symbols R and R ′ in FIG. 1 is hooked, and is upstream of the pulling direction (the direction indicated by the arrow A in FIG. 2). The side end surface is brought into abutting contact with the annular member 20. The jig 22 includes not only the upstream side in the towing direction, but also the downstream side as shown in FIG.
Can be connected. The tow wire connected to the downstream side is used to once take out the jig 22 outside the existing pipe 1 when newly inserting the annular member 20 into the existing pipe 1.
【0021】本実施例は以上のような構成であるから、
環状部材20は、分割部を密着させた状態に撓み変形を
起こさせて既設配管1内に挿入される。既設配管1内に
挿入された環状部材20は、挿入時に分割部が強制的に
撓み変形を起こさせてあるので、既設配管内1で弾性復
帰しようとするために、既設配管1の内周面に圧接す
る。1個毎あるいは任意個数若しくは人手による挿入が
難しくなると、治具22によって環状部材20が既設配
管1内に押込まれて並べられる。既設配管1内に並べら
れた環状部材20は、最初に挿入された環状部材20の
位置決めが行われている場合には、後続の環状部材20
の位置決めが必然的に行われたことになる。挿入された
環状部材20は、それ以前に挿入された環状部材20に
突き当たることで所定位置に配置されたことになり、分
割部の反発力を利用して既設配管1の内面に圧接するこ
とによって不動状態に維持される。これにより、並べら
れた環状部材20同士を接合するための作業の一つであ
る溶着あるいは接着が不要となる。溶着や接着は、地震
等の衝撃による既設配管1の延長方向でのずれを防止す
るためには実行することが好ましいが、既設配管の交換
のためのみであれば、環状部材20の反発力による位置
保持でも充分である。Since the present embodiment has the above configuration,
The annular member 20 is inserted into the existing pipe 1 by causing a bending deformation in a state where the divided portions are in close contact with each other. The annular member 20 inserted into the existing pipe 1 has the divided portion forcibly deformed and deformed at the time of insertion. Press against When it becomes difficult to insert one by one or an arbitrary number or by hand, the annular members 20 are pushed into the existing pipe 1 by the jig 22 and arranged. The annular members 20 arranged in the existing pipe 1 are connected to the following annular members 20 when the first inserted annular member 20 is positioned.
Is necessarily performed. The inserted annular member 20 is arranged at a predetermined position by abutting on the previously inserted annular member 20, and is pressed against the inner surface of the existing pipe 1 by using the repulsive force of the divided portion. It is kept immobile. This eliminates the need for welding or bonding, which is one of the operations for joining the arranged annular members 20 together. Welding and bonding are preferably performed in order to prevent the existing pipe 1 from being displaced in the extension direction due to an impact such as an earthquake, but if only the existing pipe is to be replaced, the repulsive force of the annular member 20 is used. Position holding is also sufficient.
【0022】本実施例によれば、リムを外表面に形成す
ることにより、同じ肉厚を対象とした場合の環状部材2
0の軽量化が可能になるので、挿入時での摩擦抵抗を軽
減することができる。しかも、各環状部材同士の接合
は、1組の隣り合う環状部材を跨ぐ長さの加熱溶着手段
を用いるだけでよいので、接合のための装置として、大
型なものを準備しなくて済む。According to this embodiment, by forming the rim on the outer surface, the annular member 2 having the same thickness can be used.
As a result, the frictional resistance during insertion can be reduced. In addition, since the joining between the annular members only needs to use the heat welding means having a length straddling a pair of adjacent annular members, it is not necessary to prepare a large-sized joining device.
【0023】次に、本発明の別実施例を以下に説明す
る。上記実施例において示した環状部材20は、既設配
管1の延長方向で同じ寸法によって分割されたものであ
るが、既設配管1の延長方向で長さを異ならせることも
可能である。つまり、既設配管1の延長方向での細分長
さをきわめて短くすることも可能である。この場合に
は、曲率半径にもよるが、既設配管1の形態において曲
路を対象としてその内部に並べて装填することができ
る。図5は、環状部材の長さおよび形状を既設配管1の
形態に合わせた例を示す模式図であり、同図において、
環状部材(便宜上、図2に示したものと同じように延長
方向の長さが同じ環状部材の符号20を用いる)は、既
設配管1の曲路を対象とする場合、その曲路の曲率半径
中心を基準として内側および外側での円孤の長さに対応
させて設定された曲路用環状部材20Cおよび20Dが
用いられる。Next, another embodiment of the present invention will be described below. The annular member 20 shown in the above embodiment is divided by the same dimension in the extension direction of the existing pipe 1, but the length may be different in the extension direction of the existing pipe 1. That is, the subdivision length in the extension direction of the existing pipe 1 can be extremely reduced. In this case, although it depends on the radius of curvature, in the form of the existing pipe 1, the pipes can be loaded side by side inside a curved path. FIG. 5 is a schematic view showing an example in which the length and shape of the annular member are adjusted to the form of the existing pipe 1. In FIG.
When the annular member (for the sake of convenience, the reference numeral 20 of the annular member having the same length in the extension direction as that shown in FIG. 2 is used), the radius of curvature of the curved path of the existing pipe 1 is used. The curved road annular members 20C and 20D set in correspondence with the lengths of the arcs inside and outside with respect to the center are used.
【0024】このような曲路を対象とした曲路用環状部
材20Cおよび20Dは、その曲路に至るまでに装填さ
れる環状部材20に次いで既設配管1内に挿入される。
曲路用環状部材20Cおよび20Dは、既設配管1の内
径よりも円弧面が膨出している分、外形が大きい。この
ため、既設配管1内に挿入されて曲路まで移動する課程
では、曲路用環状部材20C、あるいは20Dが牽引さ
れた際、既設配管1の内周面に外周面の一部が接触する
ことで倒れることになる。しかし、曲路に達すると曲路
内周面と形態が一致するので起き上がることができ、既
設配管1の曲路内周面に密着できる。しかも、曲路用環
状部材20Cおよび20Dは曲路全域を覆うことができ
るので、既設配管1の延長方向で端部同士を密着させて
隙間ができないようにできる。The curved road annular members 20C and 20D for such curved roads are inserted into the existing pipe 1 next to the annular member 20 loaded up to the curved road.
The outer shapes of the curved road annular members 20C and 20D are larger than the inner diameter of the existing pipe 1 because the arc surface is bulged. For this reason, in the process of being inserted into the existing pipe 1 and moving to a curved path, a part of the outer peripheral surface comes into contact with the inner peripheral surface of the existing pipe 1 when the curved annular member 20C or 20D is pulled. You will fall down. However, when it reaches the curved road, it can be raised because the form matches the inner peripheral surface of the curved road, and can be closely attached to the inner peripheral surface of the existing pipe 1. In addition, since the curved road annular members 20C and 20D can cover the entire curved road, the ends can be brought into close contact with each other in the extension direction of the existing pipe 1 so that no gap is formed.
【0025】[0025]
【発明の効果】以上のように請求項1記載の発明によれ
ば、既設配管の延長方向で細分化された環状部材を延長
方向に並列させて並列方向の端縁を接合することによ
り、既設配管内に新たな配管が敷設できることになる。
しかも、延長方向で細分化された環状部材を用いること
により、既設配管内への挿入が容易となり、さらには既
設配管の曲り部等の形態にも対応して配置づけることが
できる。As described above, according to the first aspect of the present invention, the annular members divided in the extension direction of the existing pipe are arranged in parallel in the extension direction, and the edges in the parallel direction are joined, whereby the existing pipe is joined. New pipes can be laid in the pipes.
Moreover, by using the annular member subdivided in the extension direction, insertion into the existing pipe becomes easy, and furthermore, the existing pipe can be arranged corresponding to a bent portion or the like.
【0026】請求項2および3記載の発明によれば、既
設配管内に挿入された環状部材が挿入前の形状から既設
配管内面に密着する形状に変化し、密着した際には反発
力を生起させて既設配管内面に効果的に密着することが
できる。これにより、環状部材自身の特性によって挿入
された位置での保持が可能になるので、位置保持のため
の接着作業等を不要にして更正修理に要するコストを低
減することも可能になる。According to the second and third aspects of the present invention, the annular member inserted into the existing pipe changes from a shape before insertion to a shape that is in close contact with the inner surface of the existing pipe, and when it comes into close contact, a repulsive force is generated. Thereby, it is possible to effectively adhere to the inner surface of the existing pipe. Thereby, the holding at the inserted position is enabled by the characteristics of the annular member itself, so that the bonding work or the like for holding the position becomes unnecessary, and the cost required for the correction repair can be reduced.
【0027】請求項4および5記載の発明では、牽引さ
れて移動することによる押圧動作により環状部材同士の
密着接合が行われる。According to the fourth and fifth aspects of the present invention, the annular members are tightly joined to each other by a pressing operation by being pulled and moved.
【0028】請求項6記載の発明によれば、既設配管の
形態に合わせて環状部材が装填されるので、既設配管に
曲路が存在していても、その曲路に隙間なく装填できる
ように分割されて装填される。これにより、既設配管の
形態が如何様な状態であっても、漏洩などの事故を未然
に防いで新たな配管を敷設することが可能になる。According to the sixth aspect of the present invention, the annular member is loaded according to the shape of the existing pipe, so that even if the existing pipe has a curved path, it can be loaded into the curved path without any gap. Divided and loaded. This makes it possible to lay a new pipe while preventing accidents such as leakage, regardless of the form of the existing pipe.
【図1】請求項1記載の発明に係る既設配管の更正修理
工法を説明するための模式図である。FIG. 1 is a schematic diagram for explaining a method of repairing and repairing an existing pipe according to the first aspect of the present invention.
【図2】図1に示した更正修理工法に用いられる環状部
材の挿入状態を説明するための断面図である。FIG. 2 is a cross-sectional view for explaining an inserted state of an annular member used in the repair repair method shown in FIG.
【図3】図2に示した環状部材の斜視図である。FIG. 3 is a perspective view of the annular member shown in FIG. 2;
【図4】図2中、符号IVーIV線で示す断面図であ
る。FIG. 4 is a sectional view taken along line IV-IV in FIG.
【図5】図1に示した更正修理工法における変形実施例
を説明するための模式図である。FIG. 5 is a schematic view for explaining a modified embodiment in the repair repair method shown in FIG. 1;
1 既設配管 2 PE管 3、4 作業用ピット 20 環状部材 20C、20D 曲路用環状部材 21 治具 23 牽引手段をなすワイヤ DESCRIPTION OF SYMBOLS 1 Existing piping 2 PE pipe 3, 4 Working pit 20 Annular member 20C, 20D Curved annular member 21 Jig 23 Wire forming traction means
フロントページの続き (72)発明者 金子 裕章 神奈川県大和市代官3丁目18番3号 株式 会社ハッコー技術開発センター内Continued on the front page (72) Inventor Hiroaki Kaneko 3-18-3 Daikan, Yamato-shi, Kanagawa Inside the Hakko Technology Development Center Co., Ltd.
Claims (6)
する既設配管の更正修理工法において、 上記既設配管内に任意形状からなり、上記既設配管の延
長方向で細分された長さを有する環状部材を用い、各環
状部材を上記既設配管の延長方向に連続的に挿入し、上
記延長方向端縁を接合することで一体化するようにした
ことを特徴とする既設配管の更正修理工法。1. A method of repairing an existing pipe in which a new pipe is laid in an existing pipe to correct a pipe line, wherein the length of the existing pipe has an arbitrary shape and is subdivided in an extension direction of the existing pipe. Characterized in that each annular member is continuously inserted in the extension direction of the existing pipe, and the edges in the extension direction are joined to be integrated by using an annular member having Law.
において、 上記環状部材は、可撓性を有し、その周方向の一部が切
り離され、切り離された端部が上記既設配管に挿入され
る前には上記既設配管の内周面の半径よりも幾分大きな
半径に維持されていることを特徴とする既設配管の更正
修理工法。2. The method for repairing an existing pipe according to claim 1, wherein the annular member has flexibility, a part in a circumferential direction thereof is cut off, and a cut end is connected to the existing pipe. A method of repairing an existing pipe, wherein the radius of the pipe is maintained at a value slightly larger than the radius of the inner peripheral surface of the existing pipe before insertion.
修理工法において、 上記環状部材は、ポリエチレン樹脂で構成されているこ
とを特徴とする既設配管の更正修理工法。3. The method for repairing an existing pipe according to claim 1, wherein the annular member is made of polyethylene resin.
において、 上記環状部材は、上記既設配管内に挿通後、延長方向端
縁が接合される際、上記既設配管内に挿入された治具に
よって押圧されることを特徴とする既設配管の更正修理
工法。4. The method for repairing an existing pipe according to claim 1, wherein the annular member is inserted into the existing pipe, and when an edge in an extending direction is joined, the annular member is inserted into the existing pipe. A method of repairing and repairing existing piping, characterized by being pressed by a tool.
において、 上記治具は、上記既設配管の外に駆動源を有する牽引部
材によって移動した際に上記環状部材を押圧することを
特徴とする既設配管の更正修理工法。5. The method of repairing an existing pipe according to claim 4, wherein the jig presses the annular member when the jig is moved by a traction member having a drive source outside the existing pipe. To repair existing pipes.
設配管の更正修理工法において、 上記環状部材は、既設配管の形態に合わせてその既設配
管の延長方向で分割されていることを特徴とする既設配
管の更正修理工法。6. The repair method for an existing pipe according to claim 1, wherein the annular member is divided in an extending direction of the existing pipe in accordance with a form of the existing pipe. A method of repairing and repairing existing piping.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13657097A JP3765643B2 (en) | 1997-05-27 | 1997-05-27 | Repairing and repairing existing piping |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13657097A JP3765643B2 (en) | 1997-05-27 | 1997-05-27 | Repairing and repairing existing piping |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10323896A true JPH10323896A (en) | 1998-12-08 |
JP3765643B2 JP3765643B2 (en) | 2006-04-12 |
Family
ID=15178355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13657097A Expired - Fee Related JP3765643B2 (en) | 1997-05-27 | 1997-05-27 | Repairing and repairing existing piping |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3765643B2 (en) |
-
1997
- 1997-05-27 JP JP13657097A patent/JP3765643B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3765643B2 (en) | 2006-04-12 |
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