JP2511943B2 - How to repair underground pipes - Google Patents
How to repair underground pipesInfo
- Publication number
- JP2511943B2 JP2511943B2 JP6522087A JP6522087A JP2511943B2 JP 2511943 B2 JP2511943 B2 JP 2511943B2 JP 6522087 A JP6522087 A JP 6522087A JP 6522087 A JP6522087 A JP 6522087A JP 2511943 B2 JP2511943 B2 JP 2511943B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- buried
- pipe body
- ground
- repaired
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Electric Cable Installation (AREA)
- Sewage (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Pipe Accessories (AREA)
Description
【発明の詳細な説明】 技術分野 本発明は、地中に埋設された埋設管を地上から修繕す
る方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for repairing a buried pipe buried in the ground from the ground.
背景技術 地中埋設管は、たとえば、ガス、水道、下水、温水お
よびスチームなどを導くために、また電力線および電話
線などを案内するために、土壌中に埋設されている。こ
のような地中埋設管の流体の漏洩を生じている部分、腐
食減肉部分、または塗装の防食欠陥部分などの修繕部分
の修繕を行なうためには、たとえば第５図に示されるよ
うに土壌１に竪孔２を掘削して管３を露出し、その管３
の修繕すべき部分を、ウレタンゴムなどのシール剤４に
よつて覆い、その後、竪孔２を埋め戻している。BACKGROUND ART Underground buried pipes are buried in soil, for example, for guiding gas, water, sewage, hot water and steam, and for guiding power lines and telephone lines. In order to repair such a portion of the underground pipe that is leaking fluid, a portion where corrosion is thinned, or a portion where paint is corrosion-resistant, a soil is repaired, for example, as shown in FIG. The vertical hole 2 is excavated in 1 to expose the pipe 3, and the pipe 3
The portion to be repaired is covered with a sealant 4 such as urethane rubber, and then the vertical hole 2 is backfilled.
他の先行技術では、上述の竪孔２を掘削して管３を露
出した後、その管３の修繕すべき部分を切除して入替え
るなどしている。In another prior art, after excavating the above-mentioned vertical hole 2 to expose the pipe 3, the portion of the pipe 3 to be repaired is cut and replaced.
このような各先行技術では、竪孔２を掘削するために
多くの労力を必要とし、またその竪孔２が形成される場
所が道路などであるときには、交通の障害となり、しか
もそのような道路などの地上構造物を破壊する結果にな
る。しかも上述のように管３を部分的に切除して入替え
るときには、流体の供給を停止し、あるいはまた電力の
供給および通信を遮断する必要があり、これによる支障
が大きい。In each of such prior arts, a lot of labor is required to excavate the pit 2, and when the place where the pit 2 is formed is a road or the like, it becomes an obstacle to traffic, and moreover, such a road. It will result in the destruction of ground structures such as. Moreover, when the pipe 3 is partially cut and replaced as described above, it is necessary to stop the supply of the fluid or to interrupt the supply of the electric power and the communication, which causes a serious problem.
他の先行技術は、地中埋設管の内面から漏洩を防止す
る方法であつて、そのためには、管の内面に合成樹脂製
の可撓性ライニングチユーブを内張りする方法、管の内
面に霧状のシール剤を噴射する方法、および管の内面に
液状にシール剤を塗布する方法がある。このような各先
行技術はいずれも、地中埋設管を露出するために地上か
ら竪孔を掘削しなければならず、これによつて前述と同
様な問題が生じる。しかも地中埋設管内にシール剤を噴
射する前述の先行技術では、流体の小さな漏洩個所しか
修繕することができないという問題がある。Another prior art is a method of preventing leakage from the inner surface of the underground buried pipe, for that purpose, a method of lining a flexible lining tube made of synthetic resin on the inner surface of the pipe, and a fog on the inner surface of the pipe. There is a method of spraying the sealing agent, and a method of applying the sealing agent in a liquid state on the inner surface of the pipe. In each of these prior arts, a pit must be excavated from the ground in order to expose the underground buried pipe, which causes the same problem as described above. Moreover, the above-mentioned prior art in which the sealant is injected into the underground buried pipe has a problem that only a small leak point of the fluid can be repaired.
発明が解決すべき問題点 本発明の目的は、簡便な作業によつて、地中埋設管の
修繕を地上から行うことができるようにした地中埋設管
の修繕方法を提供することである。Problem to be Solved by the Invention An object of the present invention is to provide a method for repairing an underground buried pipe, which enables the repair of the underground buried pipe to be performed from the ground by a simple operation.
問題を解決するための手段 本発明は、地中埋設管の埋設場所を検出し、埋設管の
埋設場所の近傍一方の側方に埋設管側に孔を設けた有底
の第１管体を、前記孔が大略埋設管の埋設深さになるよ
うに地上から挿入し、埋設場所の近傍他方の側方に底の
ない第２管体を、底面が大略埋設管の埋設上面になるよ
うに地上から挿入する第１工程と、 第１管体の地上部を不活性ガス供給源に接続し、第２管
体の地上部を吸引ポンプを介して検知手段に接続して、
埋設管の修繕部分を調べる第２工程と、 第１管体の地上部をシール剤供給源に接続し、第２管体
の地上部を吸引ポンプに接続し、または大気に開放し、
第１管体からシール剤を圧入し、埋設管の修繕部分と、
修繕部分近傍の土壌とをシール剤で固結して覆う第３工
程とを含むことを特徴とする地中埋設管の修繕方法であ
る。Means for Solving the Problem The present invention detects a buried place of an underground buried pipe, and provides a bottomed first pipe body having a hole on the buried pipe side on one side near the buried place of the buried pipe. , The above-mentioned hole is inserted from the ground so that it is approximately the burial depth of the burial pipe, and the second tubular body having no bottom on the other side in the vicinity of the burial place, so that the bottom surface is the burial upper face of the burial pipe. The first step of inserting from the ground, the ground portion of the first pipe body is connected to the inert gas supply source, the ground portion of the second pipe body is connected to the detection means via the suction pump,
The second step of examining the repaired portion of the buried pipe, connecting the above-ground portion of the first pipe body to the sealant supply source, connecting the above-ground portion of the second pipe body to the suction pump, or opening to the atmosphere,
The sealant is press-fitted from the first pipe, and the repaired part of the buried pipe is
A method for repairing an underground buried pipe, comprising a third step of solidifying and covering the soil in the vicinity of the repaired portion with a sealant.
作 用 本発明に従えば、埋設管の両側近傍に地上から２本の
第１、第２管体を挿入する。第１管体は、埋設管側に孔
を設けた有底の管体であり、孔が埋設管の深さになるよ
うに挿入される。第２管体は底がなく底面が埋設管の埋
設上面になるように挿入される。Operation According to the present invention, two first and second pipe bodies are inserted from the ground near both sides of the buried pipe. The first pipe body is a bottomed pipe body having a hole on the buried pipe side, and is inserted so that the hole has the depth of the buried pipe. The second pipe body is inserted so that it has no bottom and the bottom surface is the buried upper surface of the buried pipe.
次に第１管体から不活性ガスを供給し、第２管体から
吸引すれば、第１管体から供給された不活性ガスが埋設
管の近傍を通つて第２管体から吸引される。埋設管に漏
洩箇所があれば、埋設管内の流体が不活性ガスとともに
第２管体から吸引され、これが吸引ポンプの先に設けた
検出手段で検出される。また漏洩の大略の量も不活性ガ
スの吸引量と流体の濃度とから検出できる。Next, if the inert gas is supplied from the first pipe body and sucked from the second pipe body, the inert gas supplied from the first pipe body is sucked from the second pipe body through the vicinity of the buried pipe. . If there is a leak in the buried pipe, the fluid in the buried pipe is sucked from the second pipe together with the inert gas, and this is detected by the detection means provided at the tip of the suction pump. Also, the approximate amount of leakage can be detected from the suction amount of the inert gas and the concentration of the fluid.
次に第１管体の地上部を不活性ガス供給源からシール
剤供給源に継ぎ替え、シール剤を圧入して埋設管の修繕
部分とその近傍の土壌とをシール剤で固結する。このと
き第２管体は吸引され、または大気圧とされるので、シ
ール剤が埋設管の近傍に配置され易い。Next, the above-ground portion of the first pipe body is replaced from the inert gas supply source to the sealant supply source, and the sealant is press-fitted to solidify the repaired portion of the buried pipe and the soil in the vicinity thereof with the sealant. At this time, since the second pipe body is sucked or brought to the atmospheric pressure, the sealing agent is easily arranged in the vicinity of the embedded pipe.
しかも前述の先行技術に関連して述べたように道路な
どに竪孔を掘削する必要がなくなり、また地中埋設管に
よつて輸送する流体を遮断したり、その地中埋設管内に
設けられている電力線および電話などの通信線の遮断を
行なう必要がなくなる。Moreover, as described in connection with the above-mentioned prior art, it is not necessary to excavate a pit in a road or the like, and the underground buried pipe is used to shut off the fluid to be transported or to be installed in the underground buried pipe. It is no longer necessary to cut off power lines and communication lines such as telephones.
実施例 第１図は、本発明の一実施例の断面図である。土壌７
にはガスを輸送する鋼管などの地中埋設管８が設けられ
る。この管８の漏洩している部分、腐食減肉部、または
塗装の防食欠陥部分などのような修繕部分を、本発明に
従つて修繕することができる。修繕を行なうために、ま
ず地上からその地中埋設管８の埋設位置を検出する。こ
の検出のためには、地上で交流磁界を発生して磁気的に
検出する、いわゆるパイプロケータなどが用いられる。Embodiment FIG. 1 is a sectional view of an embodiment of the present invention. Soil 7
An underground buried pipe 8 such as a steel pipe for transporting gas is provided in the. Repaired parts such as leaking parts, corrosion-reduced parts, or anti-corrosion defects in the coating of this pipe 8 can be repaired according to the invention. In order to perform the repair, first, the buried position of the underground buried pipe 8 is detected from the ground. For this detection, a so-called pipe locator or the like, which generates an AC magnetic field on the ground and magnetically detects it, is used.
地中埋設管８の埋設場所が検出された後に、まず第２
図に示されるように、地中埋設管８の修繕部分の付近に
ドリル９を用いて比較的小さな孔10,11を形成する。こ
の孔10はドリル９を用いるだけでなく、棒を土壌７に打
込み、その棒を引抜いて形成してもよく、あるいはまた
土壌を吸引して孔10,11を形成するようにしてもよく、
その他の手段によつて孔10を形成してもよい。孔10,11
は、埋設管８の両側に２つ形成される。After the burial place of the underground burial pipe 8 is detected, first the second
As shown in the figure, a drill 9 is used to form relatively small holes 10 and 11 near the repaired portion of the underground buried pipe 8. The hole 10 may be formed not only by using the drill 9 but also by punching the rod into the soil 7 and pulling out the rod, or by sucking the soil to form the holes 10 and 11.
The holes 10 may be formed by other means. Hole 10,11
Two are formed on both sides of the buried pipe 8.
次に第３図を参照して、孔10,11内に鋼管などから成
る第１および第２管体12,13を挿入する。第１管体12
は、その底14が閉塞されており、底14の近傍で側方には
排出孔15が形成され、排出孔15は埋設管８の方向に向け
られる。第２管体13の下端部16は下方に開放していて、
埋設管８の上面の深さに位置する。地中埋設管８からの
ガスの漏洩状況を確認するために、第１管体12には地上
の供給源17から空気または不活性ガスたとえば窒素ガス
などを圧送する。この空気または窒素ガスは、排出孔15
から地中埋設管８の近傍の土壌７中を経て第２管体13の
下端部16から吸引される。第２管体13には、地上におい
て吸引ポンプ18が連結されており、そのガスの吸引流量
は流量計19によつて検出され、地中埋設管８から漏洩し
たガスの濃度はガス濃度検知回路20で検出する。流量計
19およびガス濃度検知回路20は検知手段を構成する。こ
うして地中埋設管８からのガスの漏洩の有無、および漏
洩しているとすれば、どの程度の漏洩量があるかを地上
で知ることができる。このことは、検知回路20によつて
検出されるガスの濃度の経時変化からもまた知ることが
できる。Next, referring to FIG. 3, first and second pipe bodies 12, 13 made of steel pipe or the like are inserted into the holes 10, 11. First tube 12
The bottom 14 is closed, a discharge hole 15 is formed laterally near the bottom 14, and the discharge hole 15 is directed toward the buried pipe 8. The lower end 16 of the second tubular body 13 is open downward,
It is located at the depth of the upper surface of the buried pipe 8. In order to confirm the leakage of gas from the underground buried pipe 8, air or an inert gas such as nitrogen gas is pressure-fed to the first pipe body 12 from a ground supply source 17. This air or nitrogen gas is discharged through the exhaust hole 15
Is sucked from the lower end portion 16 of the second pipe body 13 through the soil 7 near the underground buried pipe 8. A suction pump 18 is connected to the second pipe body 13 on the ground, the suction flow rate of the gas is detected by a flow meter 19, and the concentration of the gas leaked from the underground buried pipe 8 is a gas concentration detection circuit. Detect at 20. Flowmeter
19 and the gas concentration detection circuit 20 constitute detection means. In this way, the presence / absence of gas leakage from the underground buried pipe 8 and the leakage amount can be known on the ground. This can also be known from the change over time in the concentration of the gas detected by the detection circuit 20.
次に、前述の第１図に示されるように第１管体12の地
上部は、シール剤供給源21に接続替えされ、第１管体12
にはシール剤が圧送される。このとき第２管体13には吸
引ポンプ18が接続されたまま吸引される。したがつて吸
引ポンプ18の働きによつて、埋設管８の付近が吸引され
て負圧となる。そのため供給源21からのシール剤が第１
管体12から排出口15を経て埋設管８の修繕部分の近傍の
土壌中に確実に注入されて、浸透し、圧入されることが
可能になる。シール剤の注入量などは、前述の第３図に
関連して述べた漏洩の状況に応じて定められる。第１管
体12の排出孔15は埋設管８の深さがよく、第２管体13は
埋設管８の上面の深さがよいが、土壌７の土質の環境に
よつて若干変更してよい。こうして修繕部分とその付近
の土壌とがシール剤によつて一体的に固結されて、修繕
部分が覆われる。Next, as shown in FIG. 1 described above, the ground portion of the first pipe body 12 is reconnected to the sealant supply source 21, and the first pipe body 12 is connected.
The sealant is pressure-fed. At this time, the second tube 13 is sucked while the suction pump 18 is still connected. Therefore, by the action of the suction pump 18, the vicinity of the buried pipe 8 is sucked and becomes a negative pressure. Therefore, the sealant from the source 21 is the first
It becomes possible to surely inject into the soil in the vicinity of the repaired portion of the buried pipe 8 from the pipe body 12 through the discharge port 15, penetrate, and press fit. The injection amount of the sealing agent and the like are determined according to the leakage situation described with reference to FIG. The discharge hole 15 of the first pipe body 12 has a good depth of the buried pipe 8, and the second pipe body 13 has a good depth of the upper surface of the buried pipe 8, but it may be slightly changed depending on the soil environment of the soil 7. Good. In this way, the repaired part and the soil in the vicinity thereof are integrally solidified by the sealant, and the repaired part is covered.
シール剤の注入時において吸引ポンプ18を接続するこ
となしに、管体13の上端部を大気に開放して地中埋設管
８の修繕部分の近傍を大気圧としてもよい。これによつ
ても、管体12の排出口15からのシール剤を地中埋設管８
の修繕部分の外周に円滑に導くことが可能となる。シー
ル剤の注入後、管体12,13は土壌７から抜脱され、その
後孔10,11には土壌が埋設されて復旧される。At the time of injecting the sealing agent, the upper end of the pipe body 13 may be opened to the atmosphere and the vicinity of the repaired portion of the underground buried pipe 8 may be set to the atmospheric pressure without connecting the suction pump 18. Also by this, the sealant from the discharge port 15 of the pipe body 12 is buried in the underground pipe 8
It is possible to smoothly guide the repaired part to the outer circumference. After the injection of the sealing agent, the pipes 12 and 13 are removed from the soil 7, and then the soil is buried in the holes 10 and 11 to be restored.
第４図は、本発明の他の実施例の断面図である。この
実施例では、孔37に挿入した第２管体38を介して吸引ポ
ンプ39によつて地中埋設管８の修繕部分付近において漏
洩しているガスを吸引して排出している状態で、孔33に
挿入した第１管体34を介して供給源35からシール剤が圧
入される。修繕部分付近の領域36において、シール剤が
土壌に浸透し、シール剤が土壌とともに修繕部分を覆つ
た状態にする。しかしガス漏洩量が多い場合は、ガスは
領域36に通路40を形成して、第２管体38から外部に排出
される。埋設管８は、第２管体38に通じる通路40以外
は、シール剤によつて覆われる。FIG. 4 is a sectional view of another embodiment of the present invention. In this embodiment, the gas leaking in the vicinity of the repaired portion of the underground buried pipe 8 is sucked and discharged by the suction pump 39 through the second pipe 38 inserted into the hole 37, The sealant is press-fitted from the supply source 35 via the first pipe body 34 inserted into the hole 33. In the region 36 near the repaired portion, the sealant penetrates into the soil, and the sealant covers the repaired portion together with the soil. However, when the amount of gas leakage is large, the gas forms the passage 40 in the region 36 and is discharged from the second pipe 38 to the outside. The buried pipe 8 is covered with a sealant except for the passage 40 communicating with the second pipe body 38.
この後、第２管体38から吸引ポンプ39を取外し、第２
管体38内に地上からシール剤を圧入して、第２管体38内
をシール剤でシールして閉塞する。第２管体38内は、シ
ール剤のみでシールされるので、ガスの経路40は完全に
塞がれることになり、ガスの漏洩は確実に遮断される。Then, the suction pump 39 is removed from the second pipe body 38, and the second
A sealing agent is press-fitted into the tubular body 38 from the ground, and the inside of the second tubular body 38 is sealed with the sealing agent and closed. Since the inside of the second pipe body 38 is sealed only by the sealing agent, the gas passage 40 is completely blocked, and the leakage of gas is surely blocked.
シール剤の粘度を比較的低くした場合、地中埋設管８
の修繕部分がいんろう形管継手であつて、一方の管の端
部の外周面と他方の管の端部の内周面との間に、ヤーン
および鉛を詰込んで気密性を達成した構成を有する場合
において、そのシール剤が前記管継手内に侵入すること
により管継手の気密性能を高める。When the viscosity of the sealant is relatively low, the underground pipe 8
The repaired part was a wax-in-tube joint, and yarn and lead were packed between the outer peripheral surface of the end of one pipe and the inner peripheral surface of the end of the other pipe to achieve airtightness. In the case of having the structure, the sealing agent penetrates into the pipe joint to enhance the airtight performance of the pipe joint.
シール剤としては、有機系材料と無機系材料とがあ
り、有機系材料としては熱可塑性樹脂と、熱硬化性樹脂
とがある。熱可塑性樹脂としては、ポリエチレン、塩化
ビニル樹脂、ポリプロピレン、スチレン樹脂、ABS樹
脂、ポリビニルアルコール、アクリル樹脂、アクリロニ
トリル−スチレン系樹脂、塩化ビニリデン樹脂、AAS（A
SA）樹脂、AES樹脂（耐候性、耐衝撃性樹脂）、繊維素
誘導体樹脂、熱可塑性ポリウレタン、ポリビニルブチラ
ール、ポリ−４−メチルペンテン−１、ポリブテン−１
などがある。熱硬化性樹脂としては、不飽和ポリエステ
ル樹脂、エポキシ樹脂、フエノール樹脂、ユリア樹脂、
メラミン樹脂、ジアリルフタレート樹脂、シリコーン樹
脂、ポリウレタンなどがある。無機系材料としては、水
ガラスなどがある。The sealant includes organic materials and inorganic materials, and the organic materials include thermoplastic resins and thermosetting resins. As the thermoplastic resin, polyethylene, vinyl chloride resin, polypropylene, styrene resin, ABS resin, polyvinyl alcohol, acrylic resin, acrylonitrile-styrene resin, vinylidene chloride resin, AAS (A
SA) resin, AES resin (weather resistance, impact resistance resin), fibrin derivative resin, thermoplastic polyurethane, polyvinyl butyral, poly-4-methylpentene-1, polybutene-1
and so on. As the thermosetting resin, unsaturated polyester resin, epoxy resin, phenol resin, urea resin,
Examples include melamine resin, diallyl phthalate resin, silicone resin and polyurethane. Examples of the inorganic material include water glass.
たとえばエポキシ樹脂をシール剤として用いる場合に
は、主剤としてビスフエノールＡ型エポキシ樹脂を用
い、これは粘度10,000cps（温度25℃）を有し、硬化剤
として脂肪族ポリアミンを用い、これは粘度2,000cps
（温度25℃）を有し、主剤と硬化剤とは100対60の重量
割合で混合し、硬化時間は３時間である。For example, when an epoxy resin is used as a sealant, a bisphenol A type epoxy resin is used as a main component, which has a viscosity of 10,000 cps (temperature 25 ° C), and an aliphatic polyamine as a curing agent, which has a viscosity of 2,000. cps
(Temperature 25 ° C.), the main agent and the curing agent are mixed in a weight ratio of 100 to 60, and the curing time is 3 hours.
本発明のシール剤は、砂、粘土、山土など土壌の種類
に応じて、また乾燥用、多湿・多水用などとして、前述
のものを使い分けて用いることができ、また恒久用およ
び緊急用などとして各用途に応じて使い分けることがで
きる。The sealant of the present invention can be selectively used depending on the type of soil such as sand, clay, and mountain soil, and for drying, humid, and water, etc., and for permanent and emergency use. It can be used properly according to each application.
効 果 以上のように本発明によれば、地中埋設管の修繕箇所
を確実に把握でき、地中埋設管が埋設されている土壌に
従来のような比較的大きな竪孔を掘削する必要がなく、
これによつて作業が簡便になるとともに、そのような地
中埋設管が埋設されている場所が道路などであるときに
おける交通障害を生じることなく、また道路などの地上
構造物を破壊するおそれがなく、さらにまた、騒音や振
動を生じることを抑えることができる。さらにまた地中
埋設管を使用状態のままで、すなわち流体を輸送したま
まで、あるいはまた電力線および通信線などが挿入され
ている状態のままで、修繕を行なうことができ、地中埋
設管を切断する必要がなく、好都合である。Effect As described above, according to the present invention, it is possible to reliably grasp the repaired portion of the underground buried pipe, and it is necessary to excavate a relatively large vertical hole in the soil in which the underground buried pipe is buried. Without
This simplifies the work, and does not cause traffic obstacles when the location where such underground pipe is buried is a road, etc., and may damage ground structures such as roads. Furthermore, it is possible to suppress the generation of noise and vibration. Furthermore, the underground buried pipe can be repaired while it is still in use, that is, while the fluid is being transported, or with the power line and communication line inserted, and the underground buried pipe can be repaired. There is no need to cut it, which is convenient.
第１図は本発明の一実施例の断面図、第２図は土壌７に
孔10,11を形成する土壌を示す断面図、第３図は地中埋
設管８からのガス漏洩状態を検出するための断面図、第
４図は本発明の他の実施例の断面図、第５図は先行技術
の断面図である。 ７……土壌、８……地中埋設管、10,11,33,37……孔、1
2,34……第１管体、13,38……第２管体、17……空気ま
たは不活性ガス供給源、18,39……吸引ポンプ、19……
流量計、20……ガス濃度検地回路、21,35……シール剤
供給源FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view showing soil forming holes 10 and 11 in soil 7, and FIG. 3 is a state of gas leakage from underground buried pipe 8. 4 is a sectional view of another embodiment of the present invention, and FIG. 5 is a sectional view of the prior art. 7 …… Soil, 8 …… Underground pipe, 10,11,33,37 …… Hole, 1
2,34 …… First tube, 13,38 …… Second tube, 17 …… Air or inert gas supply source, 18,39 …… Suction pump, 19 ……
Flowmeter, 20 …… Gas concentration detection circuit, 21,35 …… Sealant supply source
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０２Ｇ 1/06 ３１１ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display area H02G 1/06 311
Claims (1)
埋設場所の近傍一方の側方に埋設管側に孔を設けた有底
の第１管体を、前記孔が大略埋設管の埋設深さになるよ
うに地上から挿入し、埋設場所の近傍他方の側方に底の
ない第２管体を、底面が大略埋設管の埋設上面になるよ
うに地上から挿入する第１工程と、 第１管体の地上部を不活性ガス供給源に接続し、第２管
体の地上部を吸引ポンプを介して検知手段に接続して、
埋設管の修繕部分を調べる第２工程と、 第１管体の地上部をシール剤供給源に接続し、第２管体
の地上部を吸引ポンプに接続し、また大気に開放し、第
１管体からシール剤を圧入し、埋設管の修繕部分と、修
繕部分近傍の土壌とをシール剤で固結して覆う第３工程
とを含むことを特徴とする地中埋設管の修繕方法。1. A bottomed first pipe body having a hole on the buried pipe side on one side near the buried place of the buried pipe is detected, and the hole is generally buried. First, the pipe is inserted from the ground to the depth of the pipe to be buried, and the second pipe body, which has no bottom on the other side in the vicinity of the buried place, is inserted from the ground so that the bottom surface is approximately the buried upper face of the buried pipe. Connecting the process and the above-ground portion of the first pipe body to the inert gas supply source, and connecting the above-ground portion of the second pipe body to the detection means via the suction pump,
The second step of investigating the repaired portion of the buried pipe, connecting the above-ground portion of the first pipe body to the sealant supply source, connecting the above-ground portion of the second pipe body to the suction pump, and opening to the atmosphere, A method for repairing a buried underground pipe, comprising a third step of press-fitting a sealing agent from a pipe body, and solidifying and covering a repaired portion of the buried pipe and soil in the vicinity of the repaired portion with a sealing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6522087A JP2511943B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6522087A JP2511943B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63231090A JPS63231090A (en) | 1988-09-27 |
| JP2511943B2 true JP2511943B2 (en) | 1996-07-03 |
Family
ID=13280614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6522087A Expired - Fee Related JP2511943B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511943B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007057061A (en) * | 2005-08-26 | 2007-03-08 | Tokyo Gas Co Ltd | Jet gas shutoff method and its device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102049333B1 (en) * | 2018-02-21 | 2019-11-28 | 김태성 | Super Annuated Sewer Change Method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848794B2 (en) * | 1977-12-15 | 1983-10-31 | 株式会社クボタ | Corrosion prevention method for buried pipes |
-
1987
- 1987-03-18 JP JP6522087A patent/JP2511943B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007057061A (en) * | 2005-08-26 | 2007-03-08 | Tokyo Gas Co Ltd | Jet gas shutoff method and its device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63231090A (en) | 1988-09-27 |
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