JPH01164891A - Method of external surface repair construction of underground laying pipe - Google Patents
Method of external surface repair construction of underground laying pipeInfo
- Publication number
- JPH01164891A JPH01164891A JP62321021A JP32102187A JPH01164891A JP H01164891 A JPH01164891 A JP H01164891A JP 62321021 A JP62321021 A JP 62321021A JP 32102187 A JP32102187 A JP 32102187A JP H01164891 A JPH01164891 A JP H01164891A
- Authority
- JP
- Japan
- Prior art keywords
- pipe joint
- pipe
- repairing
- underground
- repair
- 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.)
- Pending
Links
- 230000008439 repair process Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 10
- 238000010276 construction Methods 0.000 title claims description 3
- 239000011248 coating agent Substances 0.000 claims abstract 2
- 238000000576 coating method Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 3
- 239000000057 synthetic resin Substances 0.000 abstract description 3
- 238000012856 packing Methods 0.000 abstract 2
- 239000003566 sealing material Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 238000013022 venting Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
Abstract
Description
本発明は、ガス導管などの地下布設管、特に管継手部に
対して、この箇所を局部的に掘削して竪穴内に露出させ
、その外面から漏洩補修または予防保全の目的から樹脂
等からなるシール材を用いて補修を行なう地下布設管の
外面補修工法に関する。The present invention is aimed at underground pipes such as gas pipes, particularly at pipe joints, by locally excavating these parts and exposing them in a pit, and making them made of resin or the like for the purpose of repairing leaks from the outside surface or preventive maintenance. This article relates to a method for repairing the external surface of underground pipes using a sealing material.
一般に、地下に配管されているガス管等の既設配管は、
道路上を走行する車両の荷重やその振動、地震、あるい
は経年などにより、管継手部の接合状態が変化して間隙
を生じ、ガス洩れ等が起ることがある。
そこで、近時、既設配管を布設状態のまま、管体の外面
から樹脂などのシール材を用いて補修する工法が提案さ
れており、これら補修工法として、例えば特公昭５３−
３０９９号公報、実開昭５２−１７９２１号公報等に開
示されているように、掘削により地上に間口する竪穴内
に露出された管継手部の外周面にシール用カバーを被包
して、そのカバー内に液状シール材を充填し、固化させ
て補修を行なうようにしたものが知られている。Generally, existing piping such as gas pipes running underground is
Due to the loads and vibrations of vehicles traveling on roads, earthquakes, or aging, the connection state of pipe joints may change, creating gaps and causing gas leaks. Therefore, recently, a method has been proposed in which the existing pipe is repaired in its installed state using a sealing material such as resin from the outside of the pipe body.
As disclosed in Publication No. 3099 and Japanese Utility Model Application Publication No. 52-17921, etc., a sealing cover is wrapped around the outer peripheral surface of a pipe joint exposed in a vertical hole opened above ground by excavation. It is known that a cover is filled with a liquid sealing material and then allowed to solidify for repair.
【発明が解決しようとする課題１
しかしながら、上述した従来工法では、竪穴内に露出さ
れた管継手部の外周面にサンドブラストをかけて表面に
付着している土砂、錆等を除去し、シール材の接着を良
好にするためクリーニングした後、シール用カバーを巻
回して被包し、上記シール用カバー内の環状空間内にシ
ール剤を注入する作業工程が採られるが、サンドブラス
トの資・機材を準備し、かつ、補修場所まで運搬しなけ
ればならないという問題があった。
【課題を解決するための手段】
本発明は、上述した問題点を解決すべく提案されたもの
で、掘削した竪穴内の補修箇所を簡単に清掃した後、直
ちに瞬間接着剤や、錆および鋳鉄と確実に接着する嫌気
性樹脂などの合成樹脂系のプライマを塗布し、その後シ
ール用カバーを被包して確実な密封補修を行なえるよう
にした地下布設管の外面補修工法を提供することを目的
とするものである。
上記目的を達成するために、本発明は、地下に布設され
た既設配管等の管継手部を、掘削により地上に開口した
竪穴内に露出させ、その露出部の外側に袋状のシール用
カバーを被包してカバーと管体との間にシール材注入用
の環状空間を形成し、この空間にシール材を充填し固化
させて管体のシールすべき箇所を外部より密封補修する
工法において、上記竪穴内に露出した管継手部の周囲に
付着している土砂、鎖等を概略除去し、上記管継手部の
周囲にシール用カバーを被包する工程の前に接着性、浸
透性、硬化性の優れたプライマを塗布してなることを特
徴とするものである。Problem to be Solved by the Invention 1 However, in the conventional construction method described above, the outer circumferential surface of the pipe joint exposed in the shaft is sandblasted to remove dirt, rust, etc. adhering to the surface, and the sealing material is removed. After cleaning to improve adhesion, the sealing cover is wrapped and sealed, and a sealing agent is injected into the annular space inside the sealing cover. There was a problem in that it had to be prepared and transported to the repair site. [Means for Solving the Problems] The present invention has been proposed to solve the above-mentioned problems, and after simply cleaning the repaired area in the excavated shaft, it can be immediately removed using instant adhesive, rust and cast iron. To provide a method for repairing the external surface of underground pipes, in which a synthetic resin primer such as an anaerobic resin that reliably adheres to the pipe is applied, and then a sealing cover is encapsulated to ensure reliable sealing repair. This is the purpose. In order to achieve the above object, the present invention exposes a pipe joint part of an existing pipe or the like installed underground in a pit opened above ground by excavation, and provides a bag-shaped sealing cover on the outside of the exposed part. In this method, an annular space for injecting a sealant is formed between the cover and the pipe body, and the sealant is filled in this space and solidified to repair the part of the pipe body to be sealed from the outside. , the soil, chains, etc. adhering to the area around the pipe joint exposed in the shaft are roughly removed, and adhesiveness, permeability, It is characterized by being coated with a primer that has excellent curability.
上記手段に基づいて、本発明によれば、地下に布設され
ているガス導管等の管継手部をガス流通状態のまま外部
より補修する場合、予め掘削により地上に開口した竪穴
内に補修部を露出させ、上記補修部の付着土、錆を簡略
的に除去した後、周囲に接着性、浸透性、硬化性の優れ
た樹脂系のプライマを塗布してなるものであり、上記プ
ライマによる浸透性、硬化性等の特性によりキレート反
応を起して錆および鋳鉄管とシール材が確実に付着し、
補修作業が短時間でしかも省力的に実施される。Based on the above means, according to the present invention, when repairing a pipe joint part of a gas conduit or the like installed underground from the outside while the gas is still flowing, the repair part is installed in a vertical hole opened above ground by excavation in advance. After exposing the repaired area and simply removing soil and rust from the repaired area, a resin-based primer with excellent adhesion, permeability, and hardening properties is applied to the surrounding area. Due to its hardenability and other properties, it causes a chelate reaction to ensure rust and cast iron pipes and sealing materials adhere.
Repair work can be carried out in a short time and with less labor.
以下、本発明による実施例を添付した図面に基づいて詳
細に説明する。
図において、符号１は地下に布設されＩｃ鋳鉄管からな
るガス導管で、この導管１は、その長さ方向に７ランジ
または水道型継手等による管継手部２をほぼ所定間隔に
設けて連結されている。
この管継手部２は、経年変化や地盤変化等により接合部
分に隙間を生じてガス導管１内を流通するガスの漏洩を
生ずることがあり、ガス漏洩が生じた場合には迅速に補
修する必要があるとともに、ガス洩れが生じない場合で
も、予防保全の目的から管継手部２の補修が必要である
。
上記管継手部２の補修に際しては、まず管継手部２の位
置を検知し、竪穴３を掘削し、この竪穴３内に布設され
ていた管継手部２を中心に前後の導管１の周囲を露出さ
せる。
次に、竪穴３内に露出した上記ガス導管１の管継手部２
の周囲に付着している土砂は、ブラシやサンドペーパー
等により除去されるが、従来のようにサンドブラストを
用いて丁寧に清掃することなく、大ざっばな泥落し、錆
落しが施される。
次に、上記管継手部２の周囲には、接着性、浸透性およ
び硬化性に優れ、管継手部２の錆および鋳鉄管とキレー
ト反応を起す瞬間接着剤と呼ばれる嫌気性樹脂などの合
成樹脂系のプライマ４が塗布される。そして、管継手部
２の部分が袋状のシール用カバー５により被包される。
上記シール用カバー５は、ファスナ付の気密性織布など
で成形され、シール材注入管６と、空気抜き管７が設置
されており、上記空気抜き管７が管継手部２の真上に位
置するように位置決めして被包される。
次に、管継手部２の外周にシール材注入管６を介してシ
ール材８を注入して本補修が行なわれ、シール材８の硬
化が進んだ後、シール用カバー５を注入管６、空気抜き
管７と共に竪穴３を埋戻しして一連の補修作業が完了す
る。
このような補修工程では、管継手部２の表面にプライマ
４が塗布されているので親和性がよく確実にシールされ
、また、サンドブラストの資・機材を必要とせず、作業
員による作業が容易にできる。Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a gas conduit constructed underground and made of Ic cast iron pipes, and this conduit 1 is connected along its length with pipe joints 2 such as seven flange or water-type joints provided at approximately predetermined intervals. ing. Due to aging, ground changes, etc., this pipe joint part 2 may create a gap in the joint part, causing a leak of the gas flowing through the gas pipe 1. If a gas leak occurs, it is necessary to repair it promptly. In addition, even if no gas leak occurs, the pipe joint portion 2 must be repaired for the purpose of preventive maintenance. When repairing the pipe joint part 2, first, the position of the pipe joint part 2 is detected, a vertical hole 3 is excavated, and the surroundings of the conduit 1 before and after the pipe joint part 2 installed in the vertical hole 3 are expose. Next, the pipe joint part 2 of the gas conduit 1 exposed inside the vertical hole 3
The dirt adhering to the area is removed using brushes, sandpaper, etc., but rather than using sandblasting to carefully clean the area as in the past, a cursory method of removing dirt and rust is applied. Next, around the pipe joint part 2, a synthetic resin such as an anaerobic resin called an instant adhesive, which has excellent adhesiveness, permeability, and hardening properties, and which causes a chelate reaction with the rust of the pipe joint part 2 and the cast iron pipe, is used. Primer 4 is applied. Then, the pipe joint portion 2 is covered with a bag-shaped sealing cover 5. The sealing cover 5 is made of an airtight woven fabric with a fastener, and is provided with a sealing material injection pipe 6 and an air venting pipe 7, and the air venting pipe 7 is located directly above the pipe joint part 2. It is positioned and encapsulated. Next, the main repair is performed by injecting the sealing material 8 into the outer circumference of the pipe joint 2 through the sealing material injection pipe 6. After the sealing material 8 has hardened, the sealing cover 5 is inserted into the injection pipe 6, and after the sealing material 8 has hardened. The pit 3 is backfilled together with the air vent pipe 7, and a series of repair work is completed. In such a repair process, since the primer 4 is applied to the surface of the pipe joint 2, it has good compatibility and seals reliably, and also eliminates the need for sandblasting materials and equipment, making the work easier for workers. can.
以上詳細に説明したように、本発明による地下布設管の
外面補修工法では、管継手部の補修を外側から行なう際
、竪穴を掘削して露出させ、付着泥土や錆の除去作業を
簡単に行い、接着性、浸透性、硬化性の優れた樹脂系の
プライマを塗布して補修施工を行なうようにしたので、
作業時間を短縮できると共に、シール材との親和性が良
好となって確実な補修作業を行なえる効果を奏する。As explained in detail above, in the method for repairing the external surface of underground pipes according to the present invention, when repairing a pipe joint from the outside, a vertical hole is excavated and exposed, and adhered mud and rust can be easily removed. , we applied a resin-based primer with excellent adhesion, permeability, and hardening properties to perform repair work.
Not only can the working time be shortened, but also the compatibility with the sealing material is improved, so that reliable repair work can be carried out.
図面は本発明による地下布設管の補修工法を示す要部の
断面図である。
１・・・導管、２・・・管継手部、３・・・竪穴、４・
・・プライマ、５・・・シール用カバー、６・・・シー
ル材注入管、７・・・空気抜き管、８・・・シール材。The drawing is a cross-sectional view of the main part showing the underground pipe repair method according to the present invention. DESCRIPTION OF SYMBOLS 1... Conduit, 2... Pipe joint part, 3... Vertical hole, 4...
...Primer, 5...Sealing cover, 6...Sealing material injection pipe, 7...Air venting pipe, 8...Sealing material.
Claims (1)
地上に開口した竪穴内に露出させ、その露出部の外側に
袋状のシール用カバーを被包してカバーと管体との間に
シール材注入用の環状空間を形成し、この空間にシール
材を充填し固化させて管体のシールすべき箇所を外部よ
り密封補修する工法において、 上記竪穴内に露出した管継手部の周囲に付着している土
砂、錆等を概略除去し、 上記管継手部の周囲にシール用カバーを被包する工程の
前に接着性、浸透性、硬化性の優れたプライマを塗布し
てなることを特徴とする地下布設管の外面補修工法。[Scope of Claims] A pipe joint part of an existing pipe, etc. installed underground is exposed in a pit opened above ground by excavation, and a bag-shaped sealing cover is wrapped around the outside of the exposed part to cover it. In this construction method, an annular space for injecting sealant is formed between the pipe and the pipe body, and the sealant is filled in this space and solidified to repair the part of the pipe body that should be sealed from the outside. The earth, sand, rust, etc. that have adhered to the area around the pipe joint are roughly removed, and a primer with excellent adhesiveness, permeability, and hardening properties is applied before the process of enclosing a sealing cover around the pipe joint. A method for repairing the external surface of underground pipes, characterized by coating them with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321021A JPH01164891A (en) | 1987-12-18 | 1987-12-18 | Method of external surface repair construction of underground laying pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62321021A JPH01164891A (en) | 1987-12-18 | 1987-12-18 | Method of external surface repair construction of underground laying pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01164891A true JPH01164891A (en) | 1989-06-28 |
Family
ID=18127910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62321021A Pending JPH01164891A (en) | 1987-12-18 | 1987-12-18 | Method of external surface repair construction of underground laying pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01164891A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57116992A (en) * | 1980-12-19 | 1982-07-21 | Mitsubishi Gas Chemical Co | Leakage repairing and reinforcing method of pipeline |
| JPS58124893A (en) * | 1982-01-14 | 1983-07-25 | 大阪瓦斯株式会社 | Method of repairing leakage of fluid conduit |
| JPS6164961A (en) * | 1984-09-05 | 1986-04-03 | 呉光塗装株式会社 | Repairing of floor surface, wall surface and ceiling surfaceof building |
| JPS61117366A (en) * | 1984-11-10 | 1986-06-04 | 日建株式会社 | Repairing of surface of concrete |
-
1987
- 1987-12-18 JP JP62321021A patent/JPH01164891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57116992A (en) * | 1980-12-19 | 1982-07-21 | Mitsubishi Gas Chemical Co | Leakage repairing and reinforcing method of pipeline |
| JPS58124893A (en) * | 1982-01-14 | 1983-07-25 | 大阪瓦斯株式会社 | Method of repairing leakage of fluid conduit |
| JPS6164961A (en) * | 1984-09-05 | 1986-04-03 | 呉光塗装株式会社 | Repairing of floor surface, wall surface and ceiling surfaceof building |
| JPS61117366A (en) * | 1984-11-10 | 1986-06-04 | 日建株式会社 | Repairing of surface of concrete |
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