JP2511944B2 - How to repair underground pipes - Google Patents
How to repair underground pipesInfo
- Publication number
- JP2511944B2 JP2511944B2 JP6522187A JP6522187A JP2511944B2 JP 2511944 B2 JP2511944 B2 JP 2511944B2 JP 6522187 A JP6522187 A JP 6522187A JP 6522187 A JP6522187 A JP 6522187A JP 2511944 B2 JP2511944 B2 JP 2511944B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- buried pipe
- inner cylinder
- ground
- pipes
- 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
- 230000008439 repair process Effects 0.000 title claims description 5
- 239000000565 sealant Substances 0.000 claims description 21
- 239000002689 soil Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 7
- 238000009933 burial Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 2
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- BWGVNKXGVNDBDI-UHFFFAOYSA-N Fibrin monomer Chemical class CNC(=O)CNC(=O)CN BWGVNKXGVNDBDI-UHFFFAOYSA-N 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000246 fibrin derivative Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
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
- Sewage (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Pipe Accessories (AREA)
- Electric Cable Installation (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を掘削するための
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、外筒と外筒より小径の内筒とを有し、仕切
部材によつて気密に仕切られ、外筒は仕切部材よりも下
方および上方であつて同一側にそれぞれ連通孔を形成
し、有底であり、内筒の先端は底がなく、仕切部材と外
筒の底との中間まで伸びる２重管から成る管体を２本備
え、 地中埋設管の埋設場所を検出し、埋設管の埋設場所近
傍両側に、地中に埋設管近傍に達する孔を穿設し、前記
管体を地中に埋設した孔に連通孔が埋設管の方向になる
ように挿入する第１工程と、 一方の管体の内筒の地上部を不活性ガス供給源に気密
に接続し、他方の管体の内筒の地上部を吸引ポンプを介
して検知手段に気密に接続して、埋設管の修繕部分を調
べる第２工程と、 双方の管体の内筒の地上部をシール剤供給源に気密に
接続し、双方の管体の外筒の内周面と内筒の外周面との
間の空間の地上部を吸引ポンプに気密に接続し、双方の
管体の内筒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 Problems The present invention has an outer cylinder and an inner cylinder having a diameter smaller than that of the outer cylinder, and is airtightly partitioned by a partition member, and the outer cylinder is the same below and above the partition member. It has a through hole on each side, has a bottom, the tip of the inner cylinder has no bottom, and is equipped with two pipes consisting of double pipes extending to the middle between the partition member and the bottom of the outer cylinder. The location where the pipe is buried is detected, and holes are drilled on both sides of the buried pipe in the vicinity of the buried place to reach the buried pipe in the ground. The first step of inserting the inner cylinder of one of the pipes, and the above-ground part of the inner cylinder of one of the pipes is hermetically connected to the inert gas supply source, and the above-ground part of the inner cylinder of the other pipe is detected by a suction pump. Second step to check the repaired part of the buried pipe by air-tightly connecting to the above, and the above-ground parts of the inner cylinders of both pipes to the sealant supply source Then, the ground portion of the space between the inner peripheral surface of the outer cylinder of both pipes and the outer peripheral surface of the inner cylinder is airtightly connected to the suction pump, and the sealant is press-fitted from the inner cylinders of both pipes, A method for repairing an underground buried pipe, comprising a third step of solidifying and covering a repaired part of the buried pipe and soil in the vicinity of the repaired part 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
孔を穿設し、この孔に２本の管体を挿入する。管体は外
筒と内筒とから成る２重管であり、両筒は仕切部材によ
つて気密に仕切られ、外筒の同一側には仕切部材よりも
下方および上方に連通孔が形成され、有底である。また
内筒の先端は仕切部材と外筒の底との中間まで伸び底板
がない。したがつて一方の管体の内筒から不活性ガスを
供給し、他方の管体の内筒から吸引すれば、一方の管体
から供給された不活性ガスが、埋設管の近傍を通って他
方の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他方の管体から吸
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。Operation According to the present invention, two holes are drilled from the ground near both sides of the buried pipe, and two pipes are inserted into these holes. The tubular body is a double tube consisting of an outer cylinder and an inner cylinder, both cylinders are airtightly partitioned by a partition member, and communication holes are formed on the same side of the outer cylinder below and above the partition member. , Bottomed. Further, the tip of the inner cylinder extends to the middle between the partition member and the bottom of the outer cylinder, and there is no bottom plate. Therefore, if the inert gas is supplied from the inner cylinder of one pipe body and sucked from the inner cylinder of the other pipe body, the inert gas supplied from one pipe body passes near the buried pipe. It is sucked from the other tube. If there is a leak in the buried pipe,
The fluid in the buried pipe is sucked from the other 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.
次に双方の管体の内筒の地上部にシール剤供給源を接
続し、外筒の内周面と内筒の外周面との間の空間を吸引
ポンプに接続し、シール剤を内筒から圧入すれば、シー
ル剤は内筒の底から外筒の仕切部材下の連通孔を介して
埋設管の修繕部分とその近傍の土壌とをシール材で固結
する。このとき双方の管体の外筒と内筒との間の空気は
吸引され、外筒の仕切部材上の連通孔から、埋設管周辺
の土壌が減圧されるのでシール剤が埋設管近傍に浸透さ
れ易い。Next, connect the sealant supply source to the ground part of the inner cylinder of both pipes, connect the space between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder to the suction pump, and apply the sealant to the inner cylinder. When pressed in from above, the sealant solidifies the repaired portion of the buried pipe and the soil in the vicinity thereof from the bottom of the inner cylinder through the communication hole under the partition member of the outer cylinder with the sealant. At this time, the air between the outer cylinder and the inner cylinder of both pipes is sucked, and the soil around the buried pipe is decompressed from the communication hole on the partition member of the outer cylinder, so the sealant penetrates into the vicinity of the buried pipe. It is easy to be beaten.
シール剤を修繕部分の付近に圧送するための管体を、
土壌中に設けるには、前述の先行技術におけるような大
きな竪孔を掘削する必要がなく、また、地中埋設管によ
つて流体を輸送中のままで、あるいはまた地中埋設管内
の電力線や通信線を遮断することなしに、地中埋設管の
修繕を行なうことができて、都合がよい。A tube for pumping the sealant near the repaired part,
When installed in soil, it is not necessary to excavate a large vertical hole as in the above-mentioned prior art, and while the fluid is being transported by the underground buried pipe, or the power line in the underground buried pipe or It is convenient that the underground pipe can be repaired without interrupting the communication line.
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、ガスを輸送する地中埋設管８が設けられている。
地中埋設管８は、たとえば鋼管である。この地中埋設管
８の漏洩を防いで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
Underground is provided with a buried pipe 8 for transporting gas.
The underground buried pipe 8 is, for example, a steel pipe. In order to prevent the underground buried pipe 8 from leaking and perform repairs, the buried position of the underground buried pipe 8 is first 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、第２図に
示されるように、その地中埋設管８の両側に修繕部分の
近傍にまで達する孔10,11を、土壌７中にドリル12を用
いて形成する。このドリル12を用いる代りに、棒を土壌
７に押込み、その棒を引抜くことによつて孔10,11を形
成することができ、またその土壌７を吸引して孔10,11
を形成することも可能である。After the burial location of the underground burial pipe 8 is detected, holes 10 and 11 reaching both sides of the underground burial pipe 8 up to the vicinity of the repaired portion are drilled in the soil 7 as shown in FIG. It is formed by using 12. Instead of using the drill 12, the holes 10 and 11 can be formed by pushing the rod into the soil 7 and pulling out the rod.
Can also be formed.
孔10,11を形成した後には、その孔10,11内に一対の管
体13,14をそれぞれ挿入する。管体13は、第３図に示さ
れるように、外筒15と、それよりも小径の内筒16とを有
し、２重管状に構成される。外筒15と内筒16とは、仕切
部材17によつて気密に仕切られている。この仕切部材17
よりも下方で外筒15には、連通孔18が形成される。仕切
部材17よりも上方で外筒15には連通孔19が形成される。
連通孔18,19は、外筒の同一側に形成され、地中埋設管
８の方向に向けられる。外筒15の内周面と内筒16の外周
面との間の空間は、管20に接続される。もう１つの管体
14も同様に構成されており、対応する部分には、同一の
参照符に、添字ａを付して示す。After forming the holes 10 and 11, a pair of pipe bodies 13 and 14 are inserted into the holes 10 and 11, respectively. As shown in FIG. 3, the tube body 13 has an outer cylinder 15 and an inner cylinder 16 having a diameter smaller than that of the outer cylinder 15, and is configured in a double tube shape. The outer cylinder 15 and the inner cylinder 16 are airtightly separated by a partition member 17. This partition member 17
A communication hole 18 is formed in the outer cylinder 15 below the outer cylinder 15. A communication hole 19 is formed in the outer cylinder 15 above the partition member 17.
The communication holes 18 and 19 are formed on the same side of the outer cylinder, and are directed toward the underground buried pipe 8. The space between the inner peripheral surface of the outer cylinder 15 and the outer peripheral surface of the inner cylinder 16 is connected to the pipe 20. Another tube
14 has the same structure, and the corresponding parts are indicated by the same reference numerals with a subscript a.
地中埋設管８の修繕部分からのガスの漏洩の状態を検
出するために、第４図に示されるように、管体13の内筒
16には、空気または不活性ガスたとえば窒素ガスなどを
供給源22から圧送する。管体14の内筒16aは吸引ポンプ2
3に接続し、この吸引ポンプ23からのガスは流量計24に
よつて計測され、地中埋設管８から漏洩しているガスの
濃度を検知回路25によつて検知する。流量計24および検
知回路25は、検知手段を構成する。こうして地中埋設管
８から漏洩しているガスの流量と濃度を測定し、漏洩の
状態を地上で調べることができる。この濃度の経時変化
によつてもまた、漏洩の状態を確認することができる。In order to detect the state of gas leakage from the repaired portion of the underground buried pipe 8, as shown in FIG. 4, the inner cylinder of the pipe body 13
Air or an inert gas such as nitrogen gas is pumped to the source 16 from a supply source 22. The inner cylinder 16a of the pipe body 14 is a suction pump 2
The gas from the suction pump 23 is measured by the flow meter 24, and the concentration of the gas leaking from the underground buried pipe 8 is detected by the detection circuit 25. The flow meter 24 and the detection circuit 25 constitute detection means. In this way, the flow rate and concentration of the gas leaking from the underground buried pipe 8 can be measured, and the leak state can be examined on the ground. The state of leakage can also be confirmed by the change with time of this concentration.
空気または不活性ガスは、管体13の管20からもまた圧
送し、吸引ポンプ23の入口は、前述のように管体14の内
筒16aだけではなしに、さらに管20aにもまた接続されて
もよい。Air or an inert gas is also pumped from the tube 20 of the tube 13, and the inlet of the suction pump 23 is connected not only to the inner cylinder 16a of the tube 14 as described above, but also to the tube 20a. May be.
次に第１図を参照して、管体13,14の内筒16,16aには
シール剤を供給源26から圧送する。このとき、管体13,1
4の管20,20aは、吸引ポンプ23に接続される。これによ
つてシール剤は、管体13の連通孔18および管体14の連通
孔18aから地中埋設管８の修繕部分とその付近の土壌を
一体的に固結することができる。地中埋設管８から漏洩
しているガスは、管体13,14の連通孔19,19aから吸引さ
れ、これによつてシール剤が円滑に連通孔18,18aから噴
流し、地中埋設管８の修繕部分の付近に流れることが可
能になる。シール剤の供給量は、地中埋設管８のガスの
漏洩状態に応じて適切に選ぶ。Next, referring to FIG. 1, the sealant is pressure-fed from the supply source 26 to the inner cylinders 16 and 16a of the pipes 13 and 14. At this time, the tubes 13,1
The four tubes 20, 20a are connected to a suction pump 23. As a result, the sealant can integrally solidify the repaired portion of the underground buried pipe 8 and the soil in the vicinity thereof from the communication hole 18 of the pipe body 13 and the communication hole 18a of the pipe body 14. The gas leaking from the underground buried pipe 8 is sucked through the communication holes 19 and 19a of the pipe bodies 13 and 14, whereby the sealing agent is smoothly jetted from the communication holes 18 and 18a, and the underground buried pipe is It becomes possible to flow near the repaired part of No. 8. The supply amount of the sealing agent is appropriately selected according to the gas leakage state of the underground buried pipe 8.
シール剤を供給する圧力は、地中埋設管８によつて輸
送するガスの圧力と等しいかそれ以上の圧力で供給し
て、そのシール剤が地中埋設管８の修繕部分とその近傍
に確実に到達することを可能にする。The pressure for supplying the sealant is equal to or higher than the pressure of the gas transported by the underground buried pipe 8, and the sealant is surely supplied to the repaired portion of the underground buried pipe 8 and its vicinity. To be able to reach.
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 a configuration, 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.
本発明に用いるシール剤は、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 used in 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 can be used for permanent and emergency. 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を形成する工程を示す断面図、第３図は管体13
の断面図、第４図は地中埋設管８からのガスの漏洩状態
を検出するための断面図、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……孔、13,14…
…管体、15,15a……外筒、16,16a……内筒、22……空気
または不活性ガス供給源、23……吸引ポンプ、24……流
量計、25……ガス濃度検知回路、26……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 a step of forming holes 10 and 11 in soil 7, and FIG.
FIG. 4 is a sectional view for detecting the leakage state of gas from the underground buried pipe 8, and FIG. 5 is a sectional view of the prior art. 7 ... Soil, 8 ... Underground pipe, 10,11 ... hole, 13,14 ...
… Body, 15,15a …… Outer cylinder, 16,16a …… Inner cylinder, 22 …… Air or inert gas supply source, 23 …… Suction pump, 24 …… Flowmeter, 25 …… Gas concentration detection circuit , 26 …… Sealing agent 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)
部材によつて気密に仕切られ、外筒は仕切部材よりも下
方および上方であつて同一側にそれぞれ連通孔を形成
し、有底であり、内筒の先端は底がなく、仕切部材と外
筒の底との中間まで伸びる２重管から成る管体を２本備
え、 地中埋設管の埋設場所を検出し、埋設管の埋設場所近傍
両側に、地中に埋設管近傍に達する孔を穿設し、前記管
体を地中に穿設した孔に連通孔が埋設管の方向になるよ
うに挿入する第１工程と、 一方の管体の内筒の地上部を不活性ガス供給源に気密に
接続し、他方の管体の内筒の地上部を吸引ポンプを介し
て検知手段に気密に接続して、埋設管の修繕部分を調べ
る第２工程と、 双方の管体の内筒の地上部をシール剤供給源に気密に接
続し、双方の管体の外筒の内周面と内筒の外周面との間
の空間の地上部を吸引ポンプに気密に接続し、双方の管
体の内筒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. An outer cylinder and an inner cylinder having a diameter smaller than that of the outer cylinder, which are airtightly partitioned by a partition member, and the outer cylinder has communication holes below and above the partition member on the same side. It is formed and has a bottom. The tip of the inner cylinder has no bottom, and it has two pipes consisting of double pipes that extend to the middle of the partition member and the bottom of the outer cylinder, and detects the location of the underground pipe. Then, on both sides of the buried pipe in the vicinity of the burying place, holes are formed in the ground to reach the vicinity of the buried pipe, and the pipe body is inserted into the hole formed in the ground so that the communication holes are in the direction of the buried pipe. In the first step, the above-ground portion of the inner cylinder of one pipe body is airtightly connected to the inert gas supply source, and the aboveground portion of the inner cylinder of the other pipe body is airtightly connected to the detection means via the suction pump. 2nd step of checking the repaired part of the buried pipe, and airtightly connecting the above-ground parts of the inner cylinders of both pipes to the sealant supply source, and the outer cylinders of both pipes. The aerial part of the space between the outer peripheral surface of the peripheral surface and the inner tube is hermetically connected to the suction pump, press-fitting the sealing agent from the inner cylinder of both tube and repair portions of buried pipe,
A method for repairing an underground buried pipe, including a third step of solidifying and covering a soil near a repaired portion with a sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6522187A JP2511944B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6522187A JP2511944B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63231091A JPS63231091A (en) | 1988-09-27 |
| JP2511944B2 true JP2511944B2 (en) | 1996-07-03 |
Family
ID=13280644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6522187A Expired - Fee Related JP2511944B2 (en) | 1987-03-18 | 1987-03-18 | How to repair underground pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511944B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007057061A (en) * | 2005-08-26 | 2007-03-08 | Tokyo Gas Co Ltd | Blowing gas blocking method and blocking apparatus |
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 JP6522187A patent/JP2511944B2/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 | Blowing gas blocking method and blocking apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63231091A (en) | 1988-09-27 |
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