JPH0654151B2 - How to replace the existing pipe - Google Patents
How to replace the existing pipeInfo
- Publication number
- JPH0654151B2 JPH0654151B2 JP61169334A JP16933486A JPH0654151B2 JP H0654151 B2 JPH0654151 B2 JP H0654151B2 JP 61169334 A JP61169334 A JP 61169334A JP 16933486 A JP16933486 A JP 16933486A JP H0654151 B2 JPH0654151 B2 JP H0654151B2
- Authority
- JP
- Japan
- Prior art keywords
- existing pipe
- pipe
- crushing
- crushing head
- guide member
- 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 - Lifetime
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、地中の水道管などの既設管を開削によらない
で新管に布設替え可能な既設管の布設替え方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing an existing pipe such as an underground water pipe that can be replaced with a new pipe without opening and cutting.
従来の技術 従来のこの種の布設替え方法においては、たとえば特開
昭57-120789号公報に示されているように、既設管の外
径よりも大きい外径を有する胴部と、既設管の内壁と係
合してその壁体を破砕する前方部分とを有する掘削機が
使用され、掘削機の後端に新管を取り付け、掘削機の前
方部分を先にしてこの掘削機を既設管内に入り込むよう
に新管とともに移動させて既設管を破砕し、破砕した既
設管内に新管を入り込ませるための空間を破砕した既設
管内に前記胴部により維持し、この空間内に新管を入れ
ることにより既設管の布設替えをしていた。2. Description of the Related Art In the conventional method of replacing cloth of this type, as shown in, for example, Japanese Patent Laid-Open No. 57-120789, a body portion having an outer diameter larger than that of the existing pipe and an existing pipe An excavator having a front part that engages with the inner wall and crushes the wall body is used, a new pipe is attached to the rear end of the excavator, and the excavator is installed in the existing pipe with the front part of the excavator first. Move with the new pipe so as to enter and crush the existing pipe, and maintain the space for allowing the new pipe to enter the crushed existing pipe with the body part inside the crushed existing pipe, and put the new pipe in this space Had replaced the existing pipe.
発明が解決しようとする問題点 しかし、上記従来の方法によれば、何らかの原因により
掘削機の直進が阻害され、掘削機が進路から逸脱するこ
とがあるため、既設管の破砕が不確実になるという問題
があった。Problems to be Solved by the Invention However, according to the above-mentioned conventional method, the straight traveling of the excavator is hindered for some reason and the excavator may deviate from the course, so that the crushing of the existing pipe becomes uncertain. There was a problem.
問題点を解決するための手段 本発明は上記従来の問題点を解消する目的でなされたも
のであって、本発明の既設管の布設替え方法は、地中に
埋設された既設管に沿った適当距離をおいて発進坑と到
達坑とを開削し、発進坑から到達坑に至る既設管内にガ
イド部材をわたし、このガイド部材に破砕ヘッドを外ば
めするとともに破砕ヘッドの後部に新管を接続し、破砕
ヘッドをガイド部材に沿って移動させることにより、既
設管を破砕しながら新管に布設替えすることを特徴とす
るものである。Means for Solving Problems The present invention has been made for the purpose of solving the above-mentioned conventional problems, and a method for replacing an existing pipe according to the present invention is based on an existing pipe buried in the ground. Open and cut the starting pit and the reaching pit at an appropriate distance, insert a guide member in the existing pipe from the starting pit to the reaching pit, fit the crushing head to this guide member, and install a new pipe at the rear of the crushing head. By connecting and moving the crushing head along the guide member, the existing pipe is crushed and replaced by a new pipe.
作用 上記本発明の方法においては、発進坑内において新管に
推力を負荷すると、破砕ヘッドは新管とともにガイド部
材に沿って移動させられ、既設管内に押し込まれるとき
にその管壁を内部から破砕し、その跡に新管が入り込
む。破砕の進行に伴って新管を次々に接続し、破砕ヘッ
ドが到達孔に達するまで続けることにより既設管を新管
に布設替えするのである。破砕ヘッドは、移動中はガイ
ド部材により案内されているので直進し、進路から逸脱
することはない。したがって、破砕は確実に進行する。Action In the method of the present invention, when a thrust is applied to the new pipe in the starting shaft, the crushing head is moved along with the guide member along with the new pipe, and when it is pushed into the existing pipe, the pipe wall is crushed from the inside. , A new pipe enters the trace. As the crushing progresses, new pipes are connected one after another, and the crushing head continues until it reaches the reaching hole to replace the existing pipe with the new pipe. Since the crushing head is guided by the guide member while moving, it does not deviate from the path. Therefore, the crushing proceeds reliably.
実施例 以下、本発明の一実施例を第１図〜第３図にもとづいて
説明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS.
本実施例においては、第１図および第２図に示すような
破砕ヘッド１が使用される。この破砕ヘッド１は、胴部
２の前端部に破砕部３が形成されてなる。胴部２は、円
筒状で、その外径Ａは既設管８の内径ａよりも大きい。
破砕部３は、円錐状体４の外周面に複数個の板状破砕刃
５が軸方向に、かつ等間隔に設けられるとともに、先端
の小径側端部に案内筒６が接続されてなり、大径側端部
が胴部２の前端部に接続されている。破砕刃５の縁部に
は刃先７が形成され、一種のくさびを形成する。破砕刃
５の先端側のピッチ径Ｂは、既設管８の内径ａよりも小
さい。In this embodiment, a crushing head 1 as shown in FIGS. 1 and 2 is used. The crushing head 1 has a crushing section 3 formed at the front end of a body section 2. The body portion 2 has a cylindrical shape, and its outer diameter A is larger than the inner diameter a of the existing pipe 8.
The crushing unit 3 is configured such that a plurality of plate-like crushing blades 5 are provided on the outer peripheral surface of the conical body 4 in the axial direction and at equal intervals, and a guide cylinder 6 is connected to the small diameter side end of the tip. The large-diameter side end is connected to the front end of the body 2. A blade edge 7 is formed on the edge of the crushing blade 5 to form a kind of wedge. The pitch diameter B on the tip side of the crushing blade 5 is smaller than the inner diameter a of the existing pipe 8.
既設管８は、水道管のようなコンクリート管、鋳鉄管な
どで、その複数個が地中に埋設されている。まず、布設
替えすべき既設管８の管路に沿い適当距離をおいて、発
進坑９および到達坑10を地上から開削する。次に、発進
坑９内において、複数個に分割された丸棒、管などから
なる棒状のガイド部材11を次々に接続しながら既設管８
内に同心状に到達坑10まで挿通する。到達坑10内におい
ては、既設管８およびガイド部材11の端部を軸方向に移
動しないよう固定部材12により固定する。次に、発進坑
９内において、ガイド部材11の他端部に破砕ヘッド１の
案内筒６を外ばめし、胴部２の外径にほぼ等しい外径を
有する新管13の最初のものを胴部２の後端部に接続す
る。The existing pipes 8 are concrete pipes such as water pipes, cast iron pipes, etc., and a plurality of them are buried in the ground. First, the starting pit 9 and the reaching pit 10 are excavated from the ground at an appropriate distance along the pipeline of the existing pipe 8 to be replaced. Next, in the start pit 9, the rod-shaped guide members 11 made up of a plurality of divided rods and pipes are connected one after another, and the existing pipes 8 are connected.
Insert concentrically into the reaching pit 10. In the reaching pit 10, the ends of the existing pipe 8 and the guide member 11 are fixed by the fixing member 12 so as not to move in the axial direction. Next, in the start pit 9, the guide cylinder 6 of the crushing head 1 is externally fitted to the other end of the guide member 11, and the first new pipe 13 having an outer diameter substantially equal to the outer diameter of the body 2 is inserted. It is connected to the rear end of the body 2.
次に、ジャッキ14により新管13の後端面に推力を負荷す
ると、新管13および破砕ヘッド１はガイド部材11に沿っ
て進行し、破砕部３の破砕刃５が既設管８内に押し込ま
れる。そのため、破砕刃５の刃先７がくさび作用により
既設管８の管壁をその内部から破砕しながら直進し、破
砕された跡に、胴部２に続いて新管13が入り込んで行
く。このとき発生した既設管８の破砕片は、周囲の地盤
内に排除される。この間、破砕ヘッド１は、ガイド部材
11により案内されているので必ず既設管８に沿って進行
し、進路から逸脱することはない。Next, when a thrust is applied to the rear end surface of the new pipe 13 by the jack 14, the new pipe 13 and the crushing head 1 move along the guide member 11, and the crushing blade 5 of the crushing section 3 is pushed into the existing pipe 8. . Therefore, the cutting edge 7 of the crushing blade 5 goes straight while crushing the pipe wall of the existing pipe 8 from the inside by the wedge action, and the new pipe 13 follows the body portion 2 into the crushed mark. The crushed pieces of the existing pipe 8 generated at this time are eliminated in the surrounding ground. During this time, the crushing head 1 is provided with a guide member.
Since it is guided by 11, it always travels along the existing pipe 8 and never deviates from the course.
既設管８およびガイド部材11の端部は、軸方向に移動し
ないよう固定部材12により固定されているので、これら
既設管８およびガイド部材11が破砕ヘッド１の推力によ
り移動することはない。したがって、破砕ヘッド１は既
設管８を確実に破砕することができる。以後、既設管８
の破砕の進行に伴って新管13を次々に接続し、破砕ヘッ
ド１が到達坑10内に達すると、固定部材12を取り外し、
破砕ヘッド１を新管13から切り離して回収し、ガイド部
材11を引き出しながら分解して回収する。このようにし
て、既設管８は新管13に布設替えされる。Since the ends of the existing pipe 8 and the guide member 11 are fixed by the fixing member 12 so as not to move in the axial direction, the existing pipe 8 and the guide member 11 do not move by the thrust of the crushing head 1. Therefore, the crushing head 1 can reliably crush the existing pipe 8. After that, the existing pipe 8
As the crushing process progresses, new pipes 13 are connected one after another, and when the crushing head 1 reaches the inside of the reaching pit 10, the fixing member 12 is removed,
The crushing head 1 is separated from the new pipe 13 and collected, and the guide member 11 is pulled out to be disassembled and collected. In this way, the existing pipe 8 is replaced with the new pipe 13.
発明の効果 以上述べたように本発明によれば、破砕ヘッドは、移動
中はガイド部材により案内されているのでその進路から
逸脱することはない。したがって、破砕ヘッドによる既
設管の破砕が確実に進行し、布設替えを容易かつ能率的
に行なうことができる。EFFECTS OF THE INVENTION As described above, according to the present invention, the crushing head is guided by the guide member during movement, and therefore does not deviate from its course. Therefore, the crushing of the existing pipe by the crushing head is surely progressed, and the replacement of the laying can be performed easily and efficiently.
第１図は本発明の一実施例の要部を示す断面図、 第２図は第１図における破砕ヘッドの先端面図、 第３図は本発明の一実施例の全体を示す断面図である。 １……破砕ヘッド、８……既設管、９……発進坑、10…
…到達坑、11……ガイド部材、13……新管FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention, FIG. 2 is a front end view of the crushing head in FIG. 1, and FIG. 3 is a sectional view showing an entire embodiment of the present invention. is there. 1 ... Crushing head, 8 ... Existing pipe, 9 ... Start pit, 10 ...
… Reaching shaft, 11… Guide member, 13… New pipe
Claims (1)
をおいて発進抗と到達坑とを開削し、発進坑から到達坑
に至る既設管内に棒状のガイド部材をわたし、このガイ
ド部材に破砕ヘッドを外ばめするとともに破砕ヘッドの
後部に新管を接続し、破砕ヘッドをガイド部材に沿って
移動させることにより、既設管を破砕しながら新管に布
設替えすることを特徴とする既設管の布設替え方法。1. A guide member in the form of a rod is provided in the existing pipe extending from the starting pit to the reaching pit by excavating the starting pit and the reaching pit at an appropriate distance along the existing pipe buried in the ground. It is characterized by fitting the crushing head to the member and connecting a new pipe to the rear part of the crushing head, and moving the crushing head along the guide member so that the existing pipe can be crushed and replaced by a new pipe. How to replace existing pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169334A JPH0654151B2 (en) | 1986-07-17 | 1986-07-17 | How to replace the existing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169334A JPH0654151B2 (en) | 1986-07-17 | 1986-07-17 | How to replace the existing pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6326482A JPS6326482A (en) | 1988-02-04 |
| JPH0654151B2 true JPH0654151B2 (en) | 1994-07-20 |
Family
ID=15884625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61169334A Expired - Lifetime JPH0654151B2 (en) | 1986-07-17 | 1986-07-17 | How to replace the existing pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0654151B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019094682A (en) * | 2017-11-22 | 2019-06-20 | 機動建設工業株式会社 | Reconstruction method of existing pipeline and existing pipe crusher used therefor |
-
1986
- 1986-07-17 JP JP61169334A patent/JPH0654151B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6326482A (en) | 1988-02-04 |
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