JP4183651B2 - Pipe laying method - Google Patents

Pipe laying method Download PDF

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JP4183651B2
JP4183651B2 JP2004106066A JP2004106066A JP4183651B2 JP 4183651 B2 JP4183651 B2 JP 4183651B2 JP 2004106066 A JP2004106066 A JP 2004106066A JP 2004106066 A JP2004106066 A JP 2004106066A JP 4183651 B2 JP4183651 B2 JP 4183651B2
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pit
push rod
adjacent
pipe
rod group
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JP2005290784A (en
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雅樹 岸
高宏 笠谷
博 清水
進 足立
惣市 岸野
純一 倉谷
一郎 村中
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Osaka Gas Co Ltd
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    • 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

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Description

本発明は、複数の新設管布設用ピットを管布設経路上で間隔をあけて掘削し、複数の前記ピットのうちで起点とする起点ピット内で短尺の押込ロッドを連結しながら、管布設経路の一方側に隣接する第一隣接ピット側に押し込み、第一隣接ピットに到達した押込ロッド群の一端部に新設管を連結して、前記押込ロッド群をピット内へ引き戻すことで、前記管を第一隣接ピットから起点ピットにわたって引き込んで布設する管布設方法に関する。   The present invention excavates a plurality of new pipe laying pits at intervals on the pipe laying path, and connects a short push rod in the starting pit starting from among the plurality of pits, The first tube is pushed into the first adjacent pit side adjacent to one side of the tube, and a new pipe is connected to one end of the push rod group that has reached the first adjacent pit, and the push rod group is pulled back into the pit, thereby The present invention relates to a pipe laying method in which a wire is drawn from a first adjacent pit over a starting pit.

従来、この種の管布設方法としては、起点ピットから第一隣接ピットへ押込ロッド群を押し込んで、その先端に新設管を連結して起点ピットへ引き戻しながら新設管を引き込む一連の管布設作業サイクルを実施する度に、押込時には起点ピットで押込ロッドどうしを連結すると共に、引き戻し時には起点ピットで押込ロッドどうしを分離回収する作業を実施していた（例えば、特許文献１参照）。   Conventionally, this type of pipe laying method involves a series of pipe laying work cycles in which a push rod group is pushed from the starting pit to the first adjacent pit, the new pipe is connected to the tip, and the new pipe is pulled back to the starting pit. When pushing, the push rods are connected to each other at the starting pit, and at the time of pulling back, the push rods are separated and collected at the starting pit (see, for example, Patent Document 1).

特開平８−６１５６１号公報JP-A-8-61561

この種の管布設においては、管布設経路に沿って多数のピットを掘削して、それら各ピット間のスパン毎に上述の管布設作業を実施することが多い。従って、１スパンにおける施工サイクルの中で多少でも工期短縮を図ることができれば、それらの積み重ねによって全体工程を大きく短縮することが可能となる。
上述した従来の管布設方法によれば、各管布設作業サイクルごとに、各押込ロッドどうしの接続、分離回収を繰り返し行う必要があり、その作業に手間が掛かって工期短縮が困難な状況であった。 In this type of pipe laying, a large number of pits are excavated along the pipe laying path, and the above pipe laying work is often performed for each span between the pits. Therefore, if the work period can be shortened to some extent during the construction cycle in one span, the entire process can be greatly shortened by stacking them.
According to the conventional pipe laying method described above, it is necessary to repeatedly connect and separate the push rods for each pipe laying work cycle, and it is difficult to shorten the construction period because it takes time and effort. It was.

従って、本発明の目的は、上記問題点を解消し、更なる工期短縮を図ることができる管布設方法を提供するところにある。   Accordingly, an object of the present invention is to provide a pipe laying method capable of solving the above-described problems and further shortening the work period.

本発明の第１の特徴構成は、複数の新設管布設用ピットを管布設経路上で間隔をあけて掘削し、複数の前記ピットのうちで起点とする起点ピット内で短尺の押込ロッドを連結しながら、管布設経路の一方側に隣接する第一隣接ピット側に押し込み、第一隣接ピットに到達した押込ロッド群の一端部に新設管を連結して、前記押込ロッド群をピット内へ引き戻すことで、前記新設管を第一隣接ピットから起点ピットにわたって引き込んで布設する管布設方法において、前記押込ロッド群を第一隣接ピットから起点ピット内へ引き戻しながら、前記管布設経路の他方側に隣接する第二隣接ピット側にそのまま押し込み、第二隣接ピットに到達した押込ロッド群の他端部に別の新設管を連結して、前記押込ロッド群を起点ピット内へ引き戻すことで、前記別の新設管を第二隣接ピットから起点ピットにわたって引き込んで布設するところにある。   The first characteristic configuration of the present invention is that a plurality of newly installed pipe laying pits are excavated at intervals on the pipe laying path, and a short push rod is connected in the starting pit of the plurality of pits. While pushing to the first adjacent pit side adjacent to one side of the pipe laying path, a new pipe is connected to one end of the push rod group that has reached the first adjacent pit, and the push rod group is pulled back into the pit. Thus, in the pipe laying method in which the new pipe is drawn from the first adjacent pit to the starting pit and installed, the push rod group is pulled back from the first adjacent pit into the starting pit and adjacent to the other side of the pipe laying path. By pushing it directly into the second adjacent pit side, connecting another new pipe to the other end of the push rod group that has reached the second adjacent pit, and pulling the push rod group back into the starting pit. There is to be laid draw over origins pit said further new pipe from the second neighboring pits.

本発明の第１の特徴構成によれば、前記押込ロッド群を第一隣接ピットから起点ピット内へ引き戻しながら、前記管布設経路の他方側に隣接する第二隣接ピット側にそのまま押し込み、第二隣接ピットに到達した押込ロッド群の他端部に別の新設管を連結して、前記押込ロッド群を起点ピット内へ引き戻すことで、前記別の新設管を第二隣接ピットから起点ピットにわたって引き込んで布設するから、第一隣接ピットまで押し込んだ押込ロッド群を起点ピットに引き戻す際に、従来実施していた各押込ロッドどうしの分離回収作業を実施する必要が無くなると共に、起点ピットから第二隣接ピットに押込ロッド群を押し込む際に、従来実施していた各押込ロッドどうしの接続作業を実施する必要が無くなる。
即ち、二つの施工スパンにおける管布設施工（地盤を対象として推進掘削しながら直に管を布設したり、既に地盤に埋設されている既設管を拡径しながらその跡に新設管を布設する施工）において、各押込ロッドどうしの接続・分離作業の１サイクル分を省略することができ、著しい工期短縮を図ることが可能となる。
また、各押込ロッドどうしの接続・分離回収の回数が減ることによって、押込ロッドの接続部の消耗を緩和することが可能となる。
その結果、施工コストの低減を叶えることが可能となる。 According to the first characteristic configuration of the present invention, while the push rod group is pulled back from the first adjacent pit into the starting pit, the push rod group is directly pushed into the second adjacent pit side adjacent to the other side of the pipe laying path, By connecting another new pipe to the other end of the push rod group reaching the adjacent pit and pulling the push rod group back into the starting pit, the other new pipe is drawn from the second adjacent pit across the starting pit. Therefore, when the push rod group pushed to the first adjacent pit is pulled back to the starting pit, there is no need to carry out the separation and recovery operation of the push rods that has been performed in the past, and the second adjacent from the starting pit. When the push rod group is pushed into the pit, it is not necessary to carry out the connection work between the push rods, which has been conventionally performed.
That is, pipe laying construction in two construction spans (laying pipes directly while propelling excavating the ground, or laying new pipes on the trace while expanding the diameter of existing pipes already buried in the ground) ), It is possible to omit one cycle of connection / separation work between the push rods, and it is possible to significantly shorten the work period.
Further, since the number of times of connection / separation / recovery between the push rods is reduced, it is possible to alleviate the wear of the connection portions of the push rods.
As a result, the construction cost can be reduced.

本発明の第２の特徴構成は、予め地下に管路が埋設されている埋設経路上に間隔をあけて複数の新設管布設用ピットを掘削し、複数の前記ピットのうちで起点とする起点ピット内で短尺の押込ロッドを連結しながら、前記埋設経路の一方側に隣接する第一隣接ピット側の前記管路内に押し込む押込工程を実施し、ピットに到達した押込ロッド群の一端部に、前記管路内に進入することで前記管路を径方向に割り拡げる拡径具と、新設管とを順に連結して、前記押込ロッド群を起点ピット内へ引き戻す引戻工程を実施し、前記拡径具で割り拡げた前記管路跡に前記新設管を第一隣接ピットから前記起点ピットにわたって引き込んで布設する管布設方法において、前記押込ロッド群を第一隣接ピットから前記起点ピット内へ引き戻しながら、前記埋設経路の他方側に隣接する第二隣接ピット側の前記管路内にそのまま押し込み、第二隣接ピットに押込ロッド群が到達したら前記引戻工程を実施して、前記別の新設管を第二隣接ピットから前記ピットにわたって引き込んで布設するところにある。   According to a second characteristic configuration of the present invention, a plurality of new pipe laying pits are excavated at intervals on a buried route in which pipes are buried underground, and the starting point is a starting point among the plurality of the pits. While connecting a short push rod in the pit, carry out a push process of pushing into the pipe line on the first adjacent pit side adjacent to one side of the buried route, and at one end of the push rod group reaching the pit The diameter expanding tool that divides the pipe line in the radial direction by entering the pipe line, and a new pipe are connected in order, and a pulling back step of pulling the push rod group back into the starting pit is performed. In the pipe laying method in which the newly installed pipe is drawn from the first adjacent pit to the starting pit in the pipe trace split by the diameter expanding tool, the push rod group is moved from the first adjacent pit into the starting pit. While pulling back When the push rod group arrives at the second adjacent pit, it is pushed into the pipe line on the second adjacent pit side adjacent to the other side of the installation route, and the pull-back process is performed, so that the other new pipe is It is in the place of drawing from the adjacent pits over the pits.

本発明の第２の特徴構成によれば、前記押込ロッド群を第一隣接ピットから前記起点ピット内へ引き戻しながら、前記埋設経路の他方側に隣接する第二隣接ピット側の前記管路内にそのまま押し込み、第二隣接ピットに押込ロッド群が到達したら引込工程（ピットに到達した押込ロッド群の一端部に、管路内に進入することで管路を径方向に割り拡げる拡径具と、新設間とを順に連結して押込ロッド群を起点ピット内へ引き戻す工程）を実施して、前記別の新設管を第二隣接ピットから前記ピットにわたって引き込んで布設するから、第一隣接ピットまで押し込んだ押込ロッド群を起点ピットに引き戻す際に、従来実施していた各押込ロッドどうしの分離回収作業を実施する必要が無くなると共に、起点ピットから第二隣接ピットに押込ロッド群を押し込む際に、従来実施していた各押込ロッドどうしの接続作業を実施する必要が無くなる。
即ち、二つの施工スパンにおける管布設施工（既に地盤に埋設されている既設管を拡径しながらその跡に新設管を布設する施工）において、各押込ロッドどうしの接続・分離作業の１サイクル分を省略することができ、著しい工期短縮を図ることが可能となる。
また、各押込ロッドどうしの接続・分離回収の回数が減ることによって、押込ロッドの接続部の消耗を緩和することが可能となる。
その結果、施工コストの低減を叶えることが可能となる。 According to the second characteristic configuration of the present invention, while the push rod group is pulled back from the first adjacent pit into the starting pit, the push rod group is inserted into the pipe line on the second adjacent pit side adjacent to the other side of the buried route. Push in as it is, when the push rod group arrives at the second adjacent pit, a retraction process (a diameter expanding tool that splits the pipe line in the radial direction by entering the pipe line at one end of the push rod group that has reached the pit, The step of connecting the new constructions in order and pulling the push rod group back into the starting pit) is carried out, and the other new construction pipe is drawn from the second adjacent pit over the pit, so that the first adjacent pit is pushed in. When pulling the push rod group back to the starting pit, there is no need to carry out the separation and recovery work for each push rod, which has been performed in the past, and the push lock from the starting pit to the second adjacent pit is eliminated. When pushing the group, it is not necessary to carry out connection operation of each other each pushing rod which has been conventionally performed.
That is, in the pipe laying construction in two construction spans (construction in which a new pipe is laid on the trace while expanding the diameter of an existing pipe already embedded in the ground), one push cycle for connecting and separating each push rod Can be omitted, and the construction period can be significantly shortened.
Further, since the number of times of connection / separation / recovery between the push rods is reduced, it is possible to alleviate the wear of the connection portions of the push rods.
As a result, the construction cost can be reduced.

本発明の第３の特徴構成は、前記押込ロッドの両端に、互いに嵌合自在なネジ構造の雄ネジ部と雌ネジ部とを各別に設けておき、前記拡径具に、前記雄ネジ部と雌ネジ部との何れか一方に嵌合連結自在な第一ネジ部を設けて構成しておき、前記第一ネジ部に嵌合連結自在な第二ネジ部を両端部に備えた連結部材を設けておき、前記第一隣接ピットから前記起点ピットへの押込ロッド群の引き戻し時、又は、前記第二隣接ピットから前記起点ピットへの押込ロッド群の引き戻し時の何れかに、押込ロッドと前記拡径具との間に前記連結部材を介在させるところにある。   According to a third characteristic configuration of the present invention, a male screw part and a female screw part of a screw structure that can be fitted to each other are provided separately at both ends of the push rod, and the male screw part is provided on the diameter expanding tool. A connecting member having a first screw portion that can be fitted and connected to either one of the first screw portion and a second screw portion that can be fitted and connected to the first screw portion at both ends. A push rod, either when the push rod group is pulled back from the first adjacent pit to the start point pit, or when the push rod group is pulled back from the second adjacent pit to the start point pit, The connecting member is interposed between the diameter expanding tool.

本発明の第３の特徴構成によれば、本発明の第２の特徴構成による上述の作用効果を叶えることができるのに加えて、複雑な加工をせずに形成できるネジ嵌合構造を、各押込ロッドどうしの連結部や、押込ロッドと拡径具との連結部に採用しているから、施工設備費の低減化を図ることが可能となる。
また、上述の施工を実施すると、前記押込ロッド群を引き戻してそのまま流用するから前後関係が反転し、先端のネジ構造が雄ネジ部である時と、雌ネジ部である時とが存在することになる。従って、通常であれば、それら雄ネジ部と雌ネジ部とに螺合できるように拡径具を雄ネジ用のものと雌ねじ用のものをそれぞれ用意しておく必要があり、コストアップにつながるところであるが、前記連結部材を用意してあれば、その連結部材を使い分けることで、拡径具そのものは、一種類のネジ種のものを兼用化することが可能となり、コストアップの防止を図ることが可能となる。 According to the third characteristic configuration of the present invention, in addition to being able to achieve the above-described operation and effect by the second characteristic configuration of the present invention, a screw fitting structure that can be formed without complicated processing, Since it is adopted as a connecting portion between the push rods or a connecting portion between the push rod and the diameter expanding tool, it is possible to reduce the construction equipment cost.
In addition, when the above construction is carried out, the push rod group is pulled back and used as it is, so that the front-rear relationship is reversed, and there is a case where the screw structure at the tip is a male screw portion and a time when it is a female screw portion. become. Therefore, normally, it is necessary to prepare a tool for a male screw and one for a female screw so that the male screw part and the female screw part can be screwed together, leading to an increase in cost. By the way, if the connecting member is prepared, by using the connecting member properly, the diameter expanding tool itself can be used for one type of screw, thereby preventing an increase in cost. It becomes possible.

以下に本発明の実施の形態を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

〔第１実施形態〕
図１、図２は、本発明の管布設方法の一例を示すものである。
図には、多数設けられたピットＰの内から、代表して、隣り合う３つのピットＰを挙げて、それらの間で実施される管布設状況を示している。 [First Embodiment]
1 and 2 show an example of the pipe laying method of the present invention.
In the figure, representatively, three adjacent pits P are given from among a large number of pits P, and a pipe laying situation performed between them is shown.

図の中央にある起点ピットＰｂにおいては、押込ロッド１を地盤中に押し込んだり引き戻したりする作業が主として実施され、推進装置２が設置されている。
また、図の左にある第一隣接ピットＰ１、及び、図の右にある第二隣接ピットＰ２においては、前記起点ピットＰｂから地盤中を押し込まれて到達した押込ロッド群Ｒの先端部に埋設するための可撓性の新設管（例えば、ポリエチレン管）Ｋを連結する作業や、押込ロッド群Ｒの引き戻しによって地盤中に引き込まれる新設管Ｋをサポートする作業が主として実施される。
そして、各ピットは、ほぼ同一線上に位置するように設けられている。 In the starting pit Pb in the center of the figure, the operation of pushing the push rod 1 into the ground and pulling it back is mainly performed, and the propulsion device 2 is installed.
Further, in the first adjacent pit P1 on the left side of the figure and the second adjacent pit P2 on the right side of the figure, it is embedded in the front end portion of the push rod group R that has been pushed through the ground from the starting pit Pb. An operation of connecting a flexible new pipe (for example, polyethylene pipe) K to support the new pipe K drawn into the ground by pulling back the push rod group R is mainly performed.
And each pit is provided so that it may be located on the substantially same line.

当該施工に用いられる施工設備について説明する。
前記押込ロッド１は、金属製で、前記起点ピットＰｂ内で連結作業を実施できるように、短尺に形成してあり、一端に雄ネジ部１ａ、他端部に雌ネジ部１ｂが形成されている。そして、隣り合うもの同士の雄ネジ部１ａと雌ネジ部１ｂとを螺合させることによって互いを連結することができる。尚、地盤内に押し込むに当たっては、押込抵抗を軽減することが可能な先細形状の先導体Ｓを押込ロッド１の先端部に螺合させて実施される。そして、押込ロッド群ＲがピットＰに到達した状態で、その先導体Ｓに替えて新設管Ｋの端部を押込ロッド群に連結して、そのまま、新設管Ｋを地盤中に引き込むことができる。
前記推進装置２は、押込ロッド１を握持自在な握持機構２ａと、その握持機構２ａを押し込み方向に沿って前後進駆動自在な挿抜機構２ｂとを備えて構成してある。
押込ロッド１を地盤中に押し込むには、前記握持機構２ａで押込ロッド１を握持した状態で前記挿抜機構２ｂを押し込み方向に前進駆動させればよい。また、前記挿抜機構のストロークの終端位置まで前進駆動が至ったら、握持機構２ａを解除して、挿抜機構２ｂをストローク始端位置まで戻した後、同様の押込動作を繰り返す。
一方、押込ロッド１を引き戻す際には、押込時とは逆の方向に挿抜機構２ｂを駆動させればよい。 The construction equipment used for the construction will be described.
The push rod 1 is made of metal and is formed in a short length so that the connecting work can be performed in the starting pit Pb. The male screw portion 1a is formed at one end and the female screw portion 1b is formed at the other end portion. Yes. And it can mutually connect by screwing the external thread part 1a and the internal thread part 1b of adjacent things. In addition, when pushing into the ground, a tapered tip conductor S capable of reducing pushing resistance is screwed onto the tip of the pushing rod 1. Then, with the push rod group R reaching the pit P, the end of the new pipe K can be connected to the push rod group in place of the leading conductor S, and the new pipe K can be pulled into the ground as it is. .
The propulsion device 2 includes a gripping mechanism 2a that can grip the push rod 1 and an insertion / extraction mechanism 2b that can drive the gripping mechanism 2a forward and backward along the pushing direction.
In order to push the push rod 1 into the ground, the insertion / extraction mechanism 2b may be driven forward in the push direction while the push rod 1 is gripped by the gripping mechanism 2a. When the forward drive reaches the stroke end position of the insertion / extraction mechanism, the gripping mechanism 2a is released, the insertion / extraction mechanism 2b is returned to the stroke start end position, and the same pushing operation is repeated.
On the other hand, when the push rod 1 is pulled back, the insertion / extraction mechanism 2b may be driven in a direction opposite to that during push-in.

次に管布設手順について説明する。
［１］ 複数の新設管布設用ピットＰを管布設経路上で間隔をあけて掘削する。
［２］ 起点ピットＰｂ内で前記押込ロッド１を連結しながら、前記推進装置２によって第一隣接ピットＰ１側に押し込む（図１（イ）参照）。
［３］ 第一隣接ピットＰ１に到達した押込ロッド群Ｒの一端部から先導体Ｓを外して、その跡に新設管Ｋを連結して、前記推進装置２によって前記押込ロッド群Ｒを起点ピットＰｂ内へ引き戻す（図１（ロ）参照）。この引き戻しに伴って、前記新設管Ｋは地盤中に引き込まれ、第一隣接ピットＰ１から起点ピットＰｂにわたって布設される。また、押込ロッド群Ｒを引き戻す際には、基端側の押込ロッド１の遊端部に、別の先導体Ｓを連結して、推進装置２で押込ロッド群Ｒを前記第二隣接ピットＰ２側にそのまま押し込む（図２（ハ）参照）。
［４］ 第二隣接ピットＰ２に到達した押込ロッド群Ｒの他端部に別の新設管Ｋを連結して、前記押込ロッド群Ｒを起点ピットＰｂ内へ引き戻す（図２（ニ）参照）。この引き戻しに伴って、前記別の新設管Ｋは地盤中に引き込まれ、第二隣接ピットＰ２から起点ピットＰｂにわたって布設される。また、押込ロッド群Ｒを引き戻す際には、ピット内に現れた押込ロッド１を一本ずつ分離して回収する（図２（ホ）参照）。 Next, the pipe laying procedure will be described.
[1] A plurality of newly installed pipe laying pits P are excavated at intervals on the pipe laying path.
[2] While pushing the push rod 1 in the starting pit Pb, the pushing device 2 pushes the push rod 1 toward the first adjacent pit P1 (see FIG. 1 (a)).
[3] The leading conductor S is removed from one end of the push rod group R that has reached the first adjacent pit P1, and a new pipe K is connected to the trace, and the push rod group R is moved to the starting pit by the propulsion device 2. Pull back into Pb (see FIG. 1B). With this pullback, the new pipe K is drawn into the ground and laid from the first adjacent pit P1 to the starting pit Pb. Further, when the push rod group R is pulled back, another leading conductor S is connected to the free end portion of the push rod 1 on the base end side, and the push rod group R is moved to the second adjacent pit P2 by the propulsion device 2. Push it in as it is (see Fig. 2 (c)).
[4] Another new pipe K is connected to the other end of the push rod group R that has reached the second adjacent pit P2, and the push rod group R is pulled back into the starting pit Pb (see FIG. 2 (d)). . With this pullback, the other new pipe K is drawn into the ground and laid from the second adjacent pit P2 to the starting pit Pb. When the push rod group R is pulled back, the push rods 1 appearing in the pits are separated and recovered one by one (see FIG. 2 (e)).

本実施形態の管布設方法によれば、各押込ロッドどうしの接続・分離作業を従来の半分の回数に減らせることができ、著しい工期短縮を図ることが可能となると共に、各押込ロッドどうしの接続・分離の回数が減ることによって、押込ロッドの接続部の消耗を緩和することが可能となり、全体としたコスト低減を図ることができる。   According to the pipe laying method of the present embodiment, the connection / separation work between the push rods can be reduced to half the number of times of the prior art, and the work period can be significantly shortened. By reducing the number of times of connection / separation, it becomes possible to alleviate the wear of the connecting portion of the push rod, and the overall cost can be reduced.

〔第２実施形態〕
図３、図４は、本発明の管布設方法の二つ目の例を示すものである。
尚、先の実施形態と共通する事項に関しては、その説明を省略し、異なった構成に関して主に説明する。
本実施形態は、先の実施形態で説明したように押込ロッド１を地盤中に推進させて新設管Ｋを布設する方式に替えて、既に埋設されている管路３を利用して、その管路３を切り拡げながらその跡に新設管Ｋを引き込んで布設する方式を採るものである。 [Second Embodiment]
3 and 4 show a second example of the pipe laying method of the present invention.
In addition, about the matter which is common in previous embodiment, the description is abbreviate | omitted and it mainly demonstrates about a different structure.
In the present embodiment, as described in the previous embodiment, instead of the method in which the push rod 1 is propelled into the ground and the new pipe K is laid, the pipe 3 that has already been buried is used. A system is adopted in which the new pipe K is drawn into the trace while the road 3 is cut and expanded.

前記起点ピットＰｂ、第一隣接ピットＰ１、第二隣接ピットＰ２は、既に埋設されている管路３の長手方向に間隔をあけた箇所にそれぞれ設けられてあり、ピット内に露出する管路部分は撤去されている。従って、ピットの壁面には、前記管路３が開口した状態となっている。
また、管路３は、ほぼ直線状に埋設されている。 The starting pit Pb, the first adjacent pit P1, and the second adjacent pit P2 are provided at locations spaced in the longitudinal direction of the pipe 3 that has already been buried, and the pipe portion exposed in the pit. Has been removed. Therefore, the pipe line 3 is open on the wall surface of the pit.
Moreover, the pipe line 3 is embed | buried substantially linearly.

当該施工に用いられる施工設備について説明する。
前記押込ロッド１、及び、推進装置２は、先の実施形態と同様の構成である。
しかしながら、押込ロッド１の押し込み時には、管路３の内空部に挿通させていくから、前記先導体Ｓは使用しない。そして、押込ロッド１は、その最大外径が管路３の最小内径より小さくなるように形成されている。従って、押込ロッド１を管路３内にスムースに挿通させることができる。
また、押込ロッド群Ｒがピットに到達した後、その押込ロッド群Ｒの先端に、前記管路３内に進入させることで管路３を径方向に割り拡げる拡径具４を連結し、その後続に前記新設管Ｋを接続した状態で、押込ロッド群Ｒと共に引き戻して新設管を布設するものである。
前記拡径具４は、図５に示すように、押込ロッド１とほぼ同じ長さ寸法の円柱状本体で構成され、胴部分には、前記管路３の内周面に食い込むように複数のカッター部４ａが設けられ、胴部から径方向外方へのカッター刃先の突出距離は、拡径具４の先端側のカッター部４ａから基端側のカッター部４ａにかけて順次大きくなるように設定されている。
また、拡径具の基端部には、前記各カッター部４ａによって徐々に切れ目が深くなるように割られた管路３の切れ目に進入しながら、図５に示すように、管路３の上縁部が揺動中心となるように押し広げる拡大部４ｂが設けられている。
そして、拡径具４の先端部には、前記押込ロッド１に形成された雄ネジ部１ａが螺合自在な雌ネジ部（第一ネジ部の一例）４ｃが、拡径具４の基端部には、前記管新設Ｋの端部と連結自在な連結部４ｄが設けられている。
尚、第一隣接ピットＰ１と起点ピットＰｂとの間での新設管Ｋの引き込み時には、押込ロッド群Ｒの先端（一端部）には雄ネジ部１ａが位置しているから、そのまま拡径具４の雌ネジ部４ｃを螺合させて、起点ピットＰｂ側へ引き戻すことができるが、第二隣接ピットと起点ピットＰｂとの間での新設管Ｋ引き込み時には、押込ロッド群Ｒの先端（他端部）には雌ネジ部１ｂが位置することとなり、そのままでは、前記拡径具４を螺合させることができない。従って、第二隣接ピットと起点ピットＰｂとの間での新設管Ｋ引き込み時には、両端部に雄ネジ部（第二ネジ部の一例）５ａを各別に備えた金属製の介在ロッド（連結部材に相当）５を、拡径具４と押込ロッド群Ｒとの間に連結して作業を進める。 The construction equipment used for the construction will be described.
The push rod 1 and the propulsion device 2 have the same configuration as in the previous embodiment.
However, when the push rod 1 is pushed, the leading conductor S is not used because the push rod 1 is inserted into the inner space of the pipe 3. The push rod 1 is formed so that its maximum outer diameter is smaller than the minimum inner diameter of the pipe 3. Therefore, the push rod 1 can be smoothly inserted into the pipe 3.
In addition, after the push rod group R reaches the pit, the diameter expanding tool 4 that splits the pipe line 3 in the radial direction by connecting the push rod group R into the pipe line 3 is connected to the tip of the push rod group R, and then Next, with the new pipe K connected, it is pulled back together with the push rod group R to lay the new pipe.
As shown in FIG. 5, the diameter expanding tool 4 is composed of a cylindrical main body having substantially the same length as the push rod 1, and the body portion has a plurality of bits so as to bite into the inner peripheral surface of the pipe line 3. The cutter part 4a is provided, and the protruding distance of the cutter blade edge radially outward from the body part is set so as to gradually increase from the cutter part 4a on the distal end side of the diameter expanding tool 4 to the cutter part 4a on the proximal end side. ing.
Further, as shown in FIG. 5, the proximal end portion of the diameter expanding tool enters the cut line of the pipe line 3 that is gradually deepened by the cutter parts 4a. An enlarged portion 4b is provided that spreads so that the upper edge is the center of oscillation.
The distal end portion of the diameter expanding tool 4 has a female thread portion (an example of a first threaded portion) 4c into which the male thread portion 1a formed on the push rod 1 can be screwed. The portion is provided with a connecting portion 4d that can be connected to the end of the new pipe K.
When the new pipe K is retracted between the first adjacent pit P1 and the starting pit Pb, the male threaded portion 1a is located at the tip (one end) of the push rod group R. 4 can be pulled back to the starting pit Pb side, but when the new pipe K is pulled between the second adjacent pit and the starting pit Pb, the tip of the push rod group R (other The female screw portion 1b is located at the end portion, and the diameter expanding tool 4 cannot be screwed as it is. Therefore, when the new pipe K is pulled between the second adjacent pit and the starting pit Pb, a metal intervening rod (an example of the second threaded portion) 5a provided at both ends (each connected to the connecting member) (Equivalent) 5 is connected between the diameter expanding tool 4 and the push rod group R, and the operation proceeds.

次に管布設手順について説明する。
［１］ 複数の新設管布設用ピットＰを既設管路３上で長手方向に間隔をあけて掘削し、ピット内に露出する既設管路３部分を撤去する。
［２］ 起点ピットＰｂ内で前記押込ロッド１を連結しながら管路３内空部に挿入し、前記推進装置２によって、第一隣接ピットＰ１側に向けて押し込む（図３（イ）参照）。
［３］ 第一隣接ピットＰ１に到達した押込ロッド群Ｒの一端部に前記拡径具４を介して新設管Ｋを連結して、前記推進装置２によって前記押込ロッド群Ｒを起点ピットＰｂ内へ引き戻す（図３（ロ）参照）。この引き戻しに伴って、拡径具４が管路３の内空部に進入しながら管路３を割り拡げ、その拡げた跡に前記新設管Ｋが引き込まれ、第一隣接ピットＰ１から起点ピットＰｂにわたって布設される。また、押込ロッド群Ｒを引き戻す際には、基端側から第二隣接ピットＰ２側の管路３に挿入してそのまま押し込む（図４（ハ）参照）。
［４］ 第二隣接ピットＰ２に到達した押込ロッド群Ｒの端部に前記介在ロッド５及び拡径具４を介在させて別の新設管Ｋを連結して、前記押込ロッド群Ｒを起点ピットＰｂ内へ引き戻す（図４（ニ）参照）。この引き戻しに伴って、前記別の新設管Ｋは割り拡げられた管路３跡に引き込まれ、第二隣接ピットＰ２から起点ピットＰｂにわたって布設される。また、押込ロッド群Ｒを引き戻す際には、ピット内に現れた押込ロッド１を一本ずつ分離して回収する（図４（ホ）参照）。 Next, the pipe laying procedure will be described.
[1] A plurality of new pipe laying pits P are excavated on the existing pipe line 3 at intervals in the longitudinal direction, and the existing pipe line 3 portion exposed in the pit is removed.
[2] Inserting the push rod 1 into the inner space of the pipeline 3 while connecting the push rod 1 in the starting pit Pb, and pushing it toward the first adjacent pit P1 by the propulsion device 2 (see FIG. 3 (A)). .
[3] A new pipe K is connected to the one end of the push rod group R that has reached the first adjacent pit P1 via the diameter expanding tool 4, and the push rod group R is moved into the starting pit Pb by the propulsion device 2. (Refer to FIG. 3 (b)). Along with this pulling back, the diameter expanding tool 4 splits the pipe 3 while entering the inner space of the pipe 3, and the new pipe K is drawn into the expanded trace, and the starting pit starts from the first adjacent pit P1. It is laid over Pb. Further, when the push rod group R is pulled back, the push rod group R is inserted into the duct 3 on the second adjacent pit P2 side from the base end side and pushed in as it is (see FIG. 4C).
[4] Another push pipe K is connected to the end of the push rod group R that has reached the second adjacent pit P2 with the interposed rod 5 and the diameter expanding tool 4 interposed therebetween, and the push rod group R is set as the starting pit. Pull back into Pb (see FIG. 4D). With this pullback, the other new pipe K is drawn into the expanded pipe 3 trace and laid from the second adjacent pit P2 to the starting pit Pb. Further, when the push rod group R is pulled back, the push rods 1 appearing in the pit are separated and collected one by one (see FIG. 4 (e)).

本実施形態の管布設方法によれば、各押込ロッドどうしの接続・分離作業を従来の半分の回数に減らせることができ、著しい工期短縮を図ることが可能となると共に、各押込ロッドどうしの接続・分離の回数が減ることによって、押込ロッドの接続部の消耗を緩和することが可能となり、全体としたコスト低減を図ることができる。   According to the pipe laying method of the present embodiment, the connection / separation work between the push rods can be reduced to half the number of times of the prior art, and the work period can be significantly shortened. By reducing the number of times of connection / separation, it becomes possible to alleviate the wear of the connecting portion of the push rod, and the overall cost can be reduced.

〔別実施形態〕
以下に他の実施の形態を説明する。 [Another embodiment]
Other embodiments will be described below.

〈１〉 押込ロッドどうしの嵌合は、先の実施形態で説明した雄ネジ部と雌ネジ部との嵌合によって連結されるネジ嵌合構造に限るものではなく、広く使用されている他の嵌合構造を採用することが可能である。
また、ネジ嵌合構造を採用する場合でも、雄ネジ部１ａを前端に配置して押し込むことに限らず、雌ネジ部１ｂを前端に配置して押し込むことであってもよい。
これらのネジ構造のバリエーションに関しては、先導体Ｓや拡径具４や連結部材５についても同様である。従って、拡径具４に備えた第一ネジ部が雄ネジ部として構成されている場合には、連結部材５に備えた第二ネジ部は、雌ネジ部として構成される。 <1> The fitting between the push rods is not limited to the screw fitting structure that is connected by fitting the male screw portion and the female screw portion described in the previous embodiment, and other widely used It is possible to employ a fitting structure.
Even when the screw fitting structure is adopted, the male screw portion 1a is not limited to being pushed in at the front end, and the female screw portion 1b may be arranged and pushed in at the front end.
The same applies to the variation of the screw structure for the leading conductor S, the diameter expanding tool 4 and the connecting member 5. Therefore, when the 1st screw part provided in diameter expanding tool 4 is constituted as an external thread part, the 2nd screw part provided in connecting member 5 is constituted as an internal thread part.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.

管布設方法の第１実施形態を示す側面視説明図Side view explanatory drawing which shows 1st Embodiment of the pipe laying method. 管布設方法の第１実施形態を示す側面視説明図Side view explanatory drawing which shows 1st Embodiment of the pipe laying method. 管布設方法の第２実施形態を示す側面視説明図Side view explanatory drawing which shows 2nd Embodiment of a pipe laying method. 管布設方法の第２実施形態を示す側面視説明図Side view explanatory drawing which shows 2nd Embodiment of a pipe laying method. 拡径具を示す説明図Explanatory drawing showing a diameter expansion tool

符号の説明Explanation of symbols

１ 押込ロッド
１ａ 雄ネジ部
１ｂ 雌ネジ部
３ 管路
４ 拡径具
４ｃ 雌ネジ部（第一ネジ部の一例）
５ 介在ロッド（連結部材に相当）
５ａ 雄ネジ部（第二ネジ部の一例）
Ｋ 新設管（例えば、ポリエチレン管）
Ｐ ピット
Ｐｂ 起点ピット
Ｐ１ 第一隣接ピット
Ｐ２ 第二隣接ピット
Ｒ 押込ロッド群 DESCRIPTION OF SYMBOLS 1 Push rod 1a Male thread part 1b Female thread part 3 Pipe line 4 Diameter-expansion tool 4c Female thread part (an example of 1st thread part)
5 Intervening rod (equivalent to connecting member)
5a Male thread (an example of the second thread)
K new pipe (eg polyethylene pipe)
P pit Pb origin pit P1 first adjacent pit P2 second adjacent pit R push rod group

Claims (3)

複数の新設管布設用ピットを管布設経路上で間隔をあけて掘削し、複数の前記ピットのうちで起点とする起点ピット内で短尺の押込ロッドを連結しながら、管布設経路の一方側に隣接する第一隣接ピット側に押し込み、第一隣接ピットに到達した押込ロッド群の一端部に新設管を連結して、前記押込ロッド群をピット内へ引き戻すことで、前記新設管を第一隣接ピットから起点ピットにわたって引き込んで布設する管布設方法であって、
前記押込ロッド群を第一隣接ピットから起点ピット内へ引き戻しながら、前記管布設経路の他方側に隣接する第二隣接ピット側にそのまま押し込み、第二隣接ピットに到達した押込ロッド群の他端部に別の新設管を連結して、前記押込ロッド群を起点ピット内へ引き戻すことで、前記別の新設管を第二隣接ピットから起点ピットにわたって引き込んで布設する管布設方法。 A plurality of newly installed pipe laying pits are excavated at intervals on the pipe laying path, and a short push rod is connected to one side of the pipe laying path within the starting pit starting from among the plurality of pits. Push in the adjacent first adjacent pit side, connect the new pipe to one end of the push rod group that has reached the first adjacent pit, and pull the push rod group back into the pit, thereby bringing the new pipe into the first adjacent pit. It is a pipe laying method for laying from the pit to the starting pit,
While pulling back the push rod group from the first adjacent pit into the starting pit, the other end portion of the push rod group that is pushed into the second adjacent pit side adjacent to the other side of the pipe laying path as it is and reaches the second adjacent pit. A pipe laying method in which another new pipe is connected and the push rod group is pulled back into the starting pit so that the other new pipe is drawn from the second adjacent pit over the starting pit. 予め地下に管路が埋設されている埋設経路上に間隔をあけて複数の新設管布設用ピットを掘削し、複数の前記ピットのうちで起点とする起点ピット内で短尺の押込ロッドを連結しながら、前記埋設経路の一方側に隣接する第一隣接ピット側の前記管路内に押し込む押込工程を実施し、ピットに到達した押込ロッド群の一端部に、前記管路内に進入することで前記管路を径方向に割り拡げる拡径具と、新設管とを順に連結して、前記押込ロッド群を起点ピット内へ引き戻す引戻工程を実施し、前記拡径具で割り拡げた前記管路跡に前記新設管を第一隣接ピットから前記起点ピットにわたって引き込んで布設する管布設方法であって、
前記押込ロッド群を第一隣接ピットから前記起点ピット内へ引き戻しながら、前記埋設経路の他方側に隣接する第二隣接ピット側の前記管路内にそのまま押し込み、第二隣接ピットに押込ロッド群が到達したら前記引戻工程を実施して、前記別の新設管を第二隣接ピットから前記起点ピットにわたって引き込んで布設する管布設方法。 A plurality of new pipe laying pits are excavated at intervals on a buried route in which pipes are buried underground in advance, and a short push rod is connected in the starting pit starting from among the plurality of pits. However, by performing a pushing process of pushing into the pipe line on the first adjacent pit side adjacent to one side of the buried path, and entering the pipe line at one end of the push rod group that has reached the pit The pipe expanded and expanded by the diameter-enlarging tool by sequentially connecting a diameter-expanding tool that splits the pipe line in the radial direction and a new pipe, and pulling the push rod group back into the starting pit. A pipe laying method in which the new pipe is drawn from the first adjacent pit to the starting pit and laid on a road trace,
While pushing back the push rod group from the first adjacent pit into the starting pit, the push rod group is pushed directly into the pipeline on the second adjacent pit side adjacent to the other side of the buried route, and the push rod group is inserted into the second adjacent pit. A pipe laying method in which the pulling-back step is performed when reaching and the other new pipe is drawn from the second adjacent pit over the starting pit. 前記押込ロッドの両端に、互いに嵌合自在なネジ構造の雄ネジ部と雌ネジ部とを各別に設けておき、前記拡径具に、前記雄ネジ部と雌ネジ部との何れか一方に嵌合連結自在な第一ネジ部を設けて構成しておき、前記第一ネジ部に嵌合連結自在な第二ネジ部を両端部に備えた連結部材を設けておき、前記第一隣接ピットから前記起点ピットへの押込ロッド群の引き戻し時、又は、前記第二隣接ピットから前記起点ピットへの押込ロッド群の引き戻し時の何れかに、押込ロッドと前記拡径具との間に前記連結部材を介在させる請求項２に記載の管布設方法。   A male screw part and a female screw part having a screw structure that can be fitted to each other are provided separately at both ends of the push rod, and the diameter expanding tool is provided on either the male screw part or the female screw part. A first screw portion that can be fitted and connected is provided, and a connecting member having a second screw portion that can be fitted and connected to the first screw portion is provided at both ends, and the first adjacent pit is provided. When the push rod group is pulled back from the second pit to the start point pit, or when the push rod group is pulled back from the second adjacent pit to the start point pit, the connection is made between the push rod and the diameter expanding tool. The pipe laying method according to claim 2, wherein a member is interposed.
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JP5422077B1 (en) * 2013-08-21 2014-02-19 京葉瓦斯株式会社 Cutting diameter expansion tool cutter and cutting diameter expansion tool using the same

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JP5887184B2 (en) * 2012-03-30 2016-03-16 東邦瓦斯株式会社 Non-cutting new pipe laying method and laying equipment
KR102042743B1 (en) * 2018-11-29 2019-11-08 (주)몰크리켓 Pipe bursting method

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