JP2007322254A - Method for checking underground-buried pipeline - Google Patents

Method for checking underground-buried pipeline Download PDF

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Publication number
JP2007322254A
JP2007322254A JP2006152934A JP2006152934A JP2007322254A JP 2007322254 A JP2007322254 A JP 2007322254A JP 2006152934 A JP2006152934 A JP 2006152934A JP 2006152934 A JP2006152934 A JP 2006152934A JP 2007322254 A JP2007322254 A JP 2007322254A
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pipe
buried
ground
transmitter
borehole
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JP2006152934A
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Japanese (ja)
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Noriyuki Arakawa
範行 荒川
Takatoshi Ochi
孝敏 越智
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Kubota Corp
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Kubota Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To make a check as far as a deeper position than in the past when checking the position of a buried pipe by using a ground penetrating radar. <P>SOLUTION: A bore hole 14 is formed along a pipe 11 buried in the ground. An electromagnetic wave 16 is transmitted/received between the bore hole 14 and a ground surface 2, thereby detecting a position where the pipe 11 is buried. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、地中に埋設された管路の位置を調査するための、地中埋設管路の調査方法に関する。   The present invention relates to a method for investigating underground conduits for investigating the position of conduits buried in the ground.

地中に埋設されている鋳鉄管などの埋設物の位置を非開削で検出するために、地中レーダや金属探知機を用いた調査が行われている。たとえば特許文献1には、送・受信機を移動させながら地中に電磁波を発射し、地中埋設物からの反射波を受信機で受信して、同埋設物の位置を検出するようにしたものが記載されている。   In order to detect the position of a buried object such as a cast iron pipe buried in the ground without digging, investigations using a ground penetrating radar or a metal detector are being conducted. For example, in Patent Document 1, an electromagnetic wave is emitted into the ground while moving a transmitter / receiver, and a reflected wave from the buried object is received by the receiver to detect the position of the buried object. Things are listed.

図3は、特許文献1に記載されたものと同様の地中レーダ機器を示す。ここで1は埋設管で、地表面2から所定の深さの位置において水平方向に埋設されている。3は地中レーダ機器で、地表面2に沿って移動可能に構成されるとともに、電磁波の送信機4と受信機5とを備えている。   FIG. 3 shows a ground penetrating radar device similar to that described in Patent Document 1. Here, reference numeral 1 denotes a buried pipe, which is buried in a horizontal direction at a predetermined depth from the ground surface 2. Reference numeral 3 denotes a ground radar device which is configured to be movable along the ground surface 2 and includes an electromagnetic wave transmitter 4 and a receiver 5.

このような構成によれば、管1が埋設されていると、送信機4からの電磁波6が管1の表面で反射され、その反射波7を受信機5で受信する。これによって、管1の埋設位置を検出することができる。
特開昭64−25078号公報
According to such a configuration, when the tube 1 is embedded, the electromagnetic wave 6 from the transmitter 4 is reflected on the surface of the tube 1 and the reflected wave 7 is received by the receiver 5. Thereby, the buried position of the tube 1 can be detected.
JP-A 64-25078

しかし、送信機4からの電磁波6は地中で徐々に減衰していくため、管1への土被りが大きくなると、すなわち管1の埋設位置が深くなると、反射波7を検出することが困難になる。このため、管1の位置を検出できる土被りhは、土質や地下水位によって変化するが、一般に0〜2.5m程度である。それ以上深い位置に埋設されている管の調査には対応できない。   However, since the electromagnetic wave 6 from the transmitter 4 is gradually attenuated in the ground, it is difficult to detect the reflected wave 7 when the covering of the pipe 1 becomes large, that is, when the buried position of the pipe 1 becomes deep. become. For this reason, the earth covering h which can detect the position of the pipe 1 varies depending on the soil quality and the groundwater level, but is generally about 0 to 2.5 m. It cannot respond to investigation of pipes buried deeper than that.

そこで本発明は、このような課題を解決して、地中レーダを用いて埋設管の位置を調査するときに、従来よりも深い位置まで調査できるようにすることを目的とする。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such problems and to investigate a position deeper than the conventional one when investigating the position of an embedded pipe using a ground penetrating radar.

この目的を達成するため本発明は、地中に埋設された管に沿ってボーリング孔を形成し、このボーリング孔と地表との間で電磁波の送受信を行うことによって、前記管の埋設位置を検出するものである。   In order to achieve this object, the present invention detects a buried position of the pipe by forming a borehole along a pipe buried in the ground and transmitting and receiving electromagnetic waves between the borehole and the ground surface. To do.

本発明によれば、送・受信機と埋設管との間で電磁波を往復させるのではなく、ボーリング孔と地表との間で電磁波の送受信を行うため、往復させる場合の2倍程度の土被りに対応した深さの埋設管の位置を検出することができる。   According to the present invention, electromagnetic waves are not reciprocated between the transmitter / receiver and the buried pipe, but electromagnetic waves are transmitted and received between the borehole and the ground surface. It is possible to detect the position of the buried pipe having a depth corresponding to.

図1および図2において、11は鋳鉄製の埋設管で、地表面12から所定の深さの位置において水平方向に埋設されている。図2において、13は、隣り合う管11、11どうしの継手部であり、図示のように継手部13を用いて多数の管11、・・・が互いに接合されることで、埋設管路が構築されている。   In FIGS. 1 and 2, reference numeral 11 denotes an embedded pipe made of cast iron, which is embedded in the horizontal direction at a predetermined depth from the ground surface 12. In FIG. 2, reference numeral 13 denotes a joint portion between adjacent pipes 11, 11. A large number of pipes 11,... Has been built.

本発明においては、図示のように、管11よりもやや下側の位置において、この管11に沿って、水平方向のボーリング孔14を形成する。このボーリング孔14は、管11すなわち埋設管路に沿った相当長さにわたって形成する。なお、図示は省略するが、ボーリング孔14の一端部および他端部においては、それぞれ地表面12からピットが開削され、このピットを利用してボーリング孔14の掘削を行う。   In the present invention, a horizontal boring hole 14 is formed along the tube 11 at a position slightly below the tube 11 as shown. The boring hole 14 is formed over a considerable length along the pipe 11, that is, the buried pipeline. In addition, although illustration is abbreviate | omitted, in one end part and the other end part of the boring hole 14, a pit is excavated from the ground surface 12, respectively, and the boring hole 14 is excavated using this pit.

ボーリング孔14と地表面12とのいずれか一方、たとえばボーリング孔14には、電磁波の送信機15が設置される。この送信機15は、ボーリング孔14の内部を、このボーリング孔14の長さ方向に移動可能である。そして地表面12には、送信機15からの電磁波16を受信可能な受信機17が設けられている。受信機17は、地表面12に沿って二次元方向に移動可能である。   An electromagnetic wave transmitter 15 is installed in one of the borehole 14 and the ground surface 12, for example, the borehole 14. The transmitter 15 can move inside the borehole 14 in the length direction of the borehole 14. A receiver 17 capable of receiving the electromagnetic wave 16 from the transmitter 15 is provided on the ground surface 12. The receiver 17 is movable in a two-dimensional direction along the ground surface 12.

管路を調査するときには、上述のピットを利用してボーリング孔14の内部に送信機15を挿入し、送信機15から電磁波16を送信しながら、図1に示すように受信機17を管11の敷設方向と異なる方向、たとえば管11の径方向と平行な方向に移動させる。すると、受信機17は、管11の影とならない位置では電磁波16を受信可能であるが、管11の影となる部分では、電磁波16をまったく受信できないか、あるいはわずかしか受信することができない。これによって、ボーリング孔14の内部における送信機の位置と、地表面12における受信機17の位置と、管11の口径とから、地中に埋設されている管11の位置を検出することができる。   When investigating the pipeline, the transmitter 15 is inserted into the borehole 14 using the pits described above, and the receiver 17 is connected to the tube 11 as shown in FIG. It is moved in a direction different from the laying direction, for example, in a direction parallel to the radial direction of the tube 11. Then, the receiver 17 can receive the electromagnetic wave 16 at a position where it does not become a shadow of the tube 11, but cannot receive the electromagnetic wave 16 at all or only slightly at a portion that becomes a shadow of the tube 11. Thereby, the position of the pipe 11 embedded in the ground can be detected from the position of the transmitter inside the borehole 14, the position of the receiver 17 on the ground surface 12, and the diameter of the pipe 11. .

このとき、図3に示すように管1からの反射波を受信するのではなく、受信機17において送信機15から直進してくる電磁波16を受信するため、図3に示す場合に比べて2倍の土被りHすなわち埋設深さであっても管11を検出することができる。具体的には、たとえば土被りHすなわち埋設深さが0〜5m程度であっても、管11を検出することができる。   At this time, the reflected wave from the tube 1 is not received as shown in FIG. 3, but the electromagnetic wave 16 traveling straight from the transmitter 15 is received by the receiver 17, so that it is 2 in comparison with the case shown in FIG. The pipe 11 can be detected even with double earth covering H, that is, the buried depth. Specifically, for example, even when the earth covering H, that is, the embedment depth is about 0 to 5 m, the pipe 11 can be detected.

図3に示すように、ボーリング孔14に沿って送信機15を移動させると、複数の管11にて構成された管路の長さ方向に沿って、その管路の埋設深さと水平方向に沿った位置とを検出することができる。このため、たとえば、一つの管11の長さ方向に沿った複数の位置で埋設深さと水平方向の位置とを検出することで、地中におけるその管の姿勢を検出することができる。また、隣り合って配置され互いに接合されている一対の管11、11の姿勢をそれぞれ検出することで、継手部13における両者の屈曲角度を求めることもできる。   As shown in FIG. 3, when the transmitter 15 is moved along the boring hole 14, along the length direction of the pipe line constituted by the plurality of pipes 11, It is possible to detect the position along. Therefore, for example, by detecting the embedment depth and the horizontal position at a plurality of positions along the length direction of one pipe 11, the attitude of the pipe in the ground can be detected. Moreover, the bending angle of both in the joint part 13 can also be calculated | required by each detecting the attitude | position of a pair of pipe | tubes 11 and 11 arrange | positioned adjacently and mutually joined.

なお、上記においてはボーリング孔14の内部に送信機15を配置し、かつ地表面12に受信機17を配置したものについて説明したが、これとは反対に、ボーリング孔14の内部に受信機17を配置し、かつ地表面12に送信機15を配置しても、同様に検出を行うことができる。ボーリング孔14の位置は、管11の直下でなくても、送信機15からの電磁波16が管11によって遮られるのであれば、任意の位置で差し支えない。   In the above description, the transmitter 15 is disposed in the borehole 14 and the receiver 17 is disposed on the ground surface 12. On the contrary, the receiver 17 is disposed in the borehole 14. Even if the transmitter 15 is arranged on the ground surface 12, the detection can be performed in the same manner. Even if the position of the borehole 14 is not directly below the tube 11, it may be at an arbitrary position as long as the electromagnetic wave 16 from the transmitter 15 is blocked by the tube 11.

本発明の実施の形態の地中埋設管路の調査方法を示す横断面図である。It is a cross-sectional view which shows the investigation method of the underground buried pipe line of embodiment of this invention. 同調査方法を示す縦断面図である。It is a longitudinal cross-sectional view which shows the investigation method. 従来の地中埋設管路の調査方法を示す横断面図である。It is a cross-sectional view which shows the investigation method of the conventional underground buried conduit.

符号の説明Explanation of symbols

11 埋設管
12 地表面
14 ボーリング孔
15 送信機
16 電磁波
17 受信機
DESCRIPTION OF SYMBOLS 11 Embedded pipe 12 Ground surface 14 Boring hole 15 Transmitter 16 Electromagnetic wave 17 Receiver

Claims (1)

地中に埋設された管に沿ってボーリング孔を形成し、このボーリング孔と地表との間で電磁波の送受信を行うことによって、前記管の埋設位置を検出することを特徴とする地中埋設管路の調査方法。   An underground pipe for detecting a buried position of the pipe by forming a borehole along the pipe buried in the ground and transmitting and receiving electromagnetic waves between the borehole and the ground surface Road survey method.
JP2006152934A 2006-06-01 2006-06-01 Method for checking underground-buried pipeline Pending JP2007322254A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103675922A (en) * 2013-12-13 2014-03-26 南京工业大学 Operation period underground pipeline pipe diameter measuring method based on ground penetrating radar
CN108415094A (en) * 2018-01-24 2018-08-17 武汉智博创享科技股份有限公司 The method for being fitted comparison extraction buried pipeline attribute by Ground Penetrating Radar result
CN113253259A (en) * 2021-04-28 2021-08-13 广州铭子通科技有限公司 Deeply buried underground pipeline detection system
WO2022190158A1 (en) * 2021-03-08 2022-09-15 日本電信電話株式会社 Search method, search system, control device, and program
CN117092644A (en) * 2023-10-17 2023-11-21 中国电建集团江西省电力设计院有限公司 Underground pipeline detection method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06174837A (en) * 1992-12-03 1994-06-24 Osaka Gas Co Ltd Method for detecting position of joint of buried pipe
JPH06264686A (en) * 1993-03-15 1994-09-20 Osaka Gas Co Ltd Method for detecting obstacle in underground pushing construction method
JPH1183994A (en) * 1997-09-09 1999-03-26 Osaka Gas Co Ltd Obstacle detector and detecting method in underground propelling work
JPH11304627A (en) * 1998-04-23 1999-11-05 Osaka Gas Co Ltd Method and apparatus for detection of leak position of gas in underground buried pipe
JP2000088571A (en) * 1998-07-15 2000-03-31 Osaka Gas Co Ltd Detecting method for position of moving body at inside of pipe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06174837A (en) * 1992-12-03 1994-06-24 Osaka Gas Co Ltd Method for detecting position of joint of buried pipe
JPH06264686A (en) * 1993-03-15 1994-09-20 Osaka Gas Co Ltd Method for detecting obstacle in underground pushing construction method
JPH1183994A (en) * 1997-09-09 1999-03-26 Osaka Gas Co Ltd Obstacle detector and detecting method in underground propelling work
JPH11304627A (en) * 1998-04-23 1999-11-05 Osaka Gas Co Ltd Method and apparatus for detection of leak position of gas in underground buried pipe
JP2000088571A (en) * 1998-07-15 2000-03-31 Osaka Gas Co Ltd Detecting method for position of moving body at inside of pipe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103675922A (en) * 2013-12-13 2014-03-26 南京工业大学 Operation period underground pipeline pipe diameter measuring method based on ground penetrating radar
CN108415094A (en) * 2018-01-24 2018-08-17 武汉智博创享科技股份有限公司 The method for being fitted comparison extraction buried pipeline attribute by Ground Penetrating Radar result
CN108415094B (en) * 2018-01-24 2020-09-18 武汉智博创享科技股份有限公司 Method for extracting buried pipeline attribute through ground penetrating radar result fitting comparison
WO2022190158A1 (en) * 2021-03-08 2022-09-15 日本電信電話株式会社 Search method, search system, control device, and program
CN113253259A (en) * 2021-04-28 2021-08-13 广州铭子通科技有限公司 Deeply buried underground pipeline detection system
CN117092644A (en) * 2023-10-17 2023-11-21 中国电建集团江西省电力设计院有限公司 Underground pipeline detection method
CN117092644B (en) * 2023-10-17 2024-01-26 中国电建集团江西省电力设计院有限公司 Underground pipeline detection method

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