JPH0396783A - Non-cut exchanging method for laid pipe - Google Patents
Non-cut exchanging method for laid pipeInfo
- Publication number
- JPH0396783A JPH0396783A JP1233757A JP23375789A JPH0396783A JP H0396783 A JPH0396783 A JP H0396783A JP 1233757 A JP1233757 A JP 1233757A JP 23375789 A JP23375789 A JP 23375789A JP H0396783 A JPH0396783 A JP H0396783A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- band body
- new
- crushing head
- new pipe
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000012634 fragment Substances 0.000 claims description 19
- 238000011084 recovery Methods 0.000 abstract 1
- 239000010425 asbestos Substances 0.000 description 13
- 229910052895 riebeckite Inorganic materials 0.000 description 13
- 238000010276 construction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は,地中に埋設された既設管の非開削布設替え工
法に関する.
従来の技術
従来のこの種の工法においては、破砕ヘッドの後端に最
初の新管を接続し,この破砕ヘッドを埋設管路の一端に
押し込むことにより既設管を破砕して地中へ埋め込み、
破砕の進行とともに新管を順次継ぎ足している.
発明が解決しようとする課題
しかし,上記従来の工法によれば、破砕した既設管の破
片がそのまま地中に残るので、たとえば既設管が石綿管
の場合には、発癌物質の一つとされている石綿を地中に
残すことになり,好ましくないという問題点がある.
そこで本発明はこのような問題点を解決し、破砕した既
設管の破片を回収できるようにすることを目的とする.
課題を解決するための手段
上記目的を達戒するため本発明は、破砕ヘッドの後端に
新管を接続し、新管内に帯状体を管軸方向に伸長可能に
設け、地中に埋設された既設管の管路の一端から破砕ヘ
ッドを押し込むことにより,前記既設管を破砕しながら
その破片を破砕ヘッドから帯状体の上に導入し、破砕の
進行にともなって新管を順次推進させるとともに帯状体
を伸長させ、ある程度の長さの帯状体を伸長させて既設
管の破片をその上に導入した後に,この帯状体を新管外
に引き出して,この帯状体の上の破片を回収するもので
ある。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a trenchless replacement method for existing pipes buried underground. Conventional technology In this type of conventional construction method, the first new pipe is connected to the rear end of the crushing head, and this crushing head is pushed into one end of the underground pipe to crush the existing pipe and bury it underground.
New pipes are being added one after another as the crushing progresses. Problems to be Solved by the Invention However, according to the above-mentioned conventional construction method, fragments of the existing pipes remain in the ground, which is considered to be a carcinogen, for example, if the existing pipes are made of asbestos. This has the problem of leaving asbestos underground, which is not desirable. Therefore, the purpose of the present invention is to solve these problems and make it possible to recover fragments of crushed existing pipes. Means for Solving the Problems In order to achieve the above object, the present invention connects a new pipe to the rear end of the crushing head, provides a band-shaped body within the new pipe so as to be extendable in the direction of the pipe axis, and provides a belt-shaped body that is buried underground. By pushing a crushing head through one end of the pipe of the existing pipe, the existing pipe is crushed and its fragments are introduced from the crushing head onto the strip, and as the crushing progresses, the new pipe is sequentially propelled. After stretching the band to a certain length and introducing fragments of the existing pipe onto it, pull this band out of the new pipe and collect the debris on top of this band. It is something.
作用
このようにすると、破砕ヘッドにより既設管を破砕しな
がらその破片を新管内の帯状体上に導入し、その後に帯
状体を新管外に引き出してこの帯状体上の破片を回収す
るので、既設管の破片が地中に残ることがない。したが
って,既設管が石綿管などの場合に特に有用となる.
実施例
以下、本発明の一実施例を第1図〜第6図にもとづいて
説明する.
本実施例の工法においては,第1図および第2図に示す
ような破砕ヘッド1を使用する.この破砕ヘッドlは、
円筒状胴部2の前端にくさび形平板状の刃部3を設け,
刃部3の両側縁に破砕刃4を形或したもので、胴部2の
前端に破片取入口5が開口している.
破砕ヘッドlを使用する際には、胴部2の後端にダミー
管6を介して新管7を接続し、刃部3の両面に高圧水噴
射用ノズル8を取り付け、さらに、第3図に示すように
、ダミー管6から新管7にわたって管内に布製の帯状体
9を管軸方向に伸長可能に布設しておく.ダミー管5は
,両端部が継手部10を介して胴部2と新管7とに挿脱
可能に接続されている.新管7は、たとえば仮設管であ
って、ガス管などを使用する.帯状体9は、ダミー管6
の中に設けられたローラ11に巻き掛けられて後方に延
伸し,繰出し可能に巻き取られている.12は胴部2内
に設けたガイド部で,破片を帯状体9の上に導入するも
のである.
次に新管7への布設替え工法を詳細に説明する.まず、
第3図に示すように、地中に複数の石綿管l3がギボル
ト継手14を介して接続された既設の埋設管路15に沿
い、一定距離をおいて発進坑l6と到達坑17とを掘削
する.発進坑16内に推進ジャッキ18を設けるととも
に,到達坑17の側の地上に高圧ポンプ19およびウイ
ンチ20を設ける.そして、上記のように組み付けた破
砕ヘッドl、ダミー管6および新管7を推進ジャッキl
8と埋設管路l5の端部との間に介装し、帯状体9の一
端部9aを発進坑16内に適宜固定する。そして高圧ホ
ース2lによりノズル8と高圧ポンプ19とを接続し、
ウインチ20のワイヤロープ22を破砕ヘッド1の刃部
3の先端に接続する.
次に、高圧ボンプl9により高圧水23をノズル8から
破砕ヘッド1内に向かって噴射し,ウインチ20により
刃部3を引っ張って心出ししながら推進ジャッキl8に
より破砕ヘッド1を埋設管路l5の一端に押し込む。破
砕ヘッド1は,破砕刃4のくさび作用により石綿管13
およびギボルト継手l4を破砕しながら前進し、石綿I
rI13の破片24、ギボルト継手14の石綿セメント
およびカラー,土砂などを破片取入口5からガイド部1
2を経由して帯状体9の上に導入する.その際、高圧水
23は破片24などの流動性を良くして帯状体9の上へ
の導入を円滑にする.なお、第4図に示すようにギボル
ト継手14の破片は地中に残るが,これは金属製である
ので問題はない.
そして第4図に示すように,破砕の進行とともに帯状体
9を繰り出して伸長させながら、新管7を順次継ぎ足す
.
次に第5図に示すように、すべての石綿管13を破砕し
て新管7に置き換えた後、到達坑l7において破砕ヘッ
ド1およびダミー管6を新管7から取り外し,高圧ポン
プl9およびウインチ20を撤去する.
最後に第6図に示すように、新管7内から帯状体9を到
達坑l7内に引き出し、この帯状体9の上の破片24、
土砂などを回収する.そして、置き換えた新管7は仮設
管であるので、これらの仮設管をその後の推進工法によ
って本来の新管に置き換える.
なお,本実施例では、当初の新管7を仮設管としたが,
仮設管とせず当初から本来の新管としておくことも可能
である.
上記の工法によれば、石綿管13の破片24およびギボ
ルト継手14の石綿セメント,カラーを帯状体9の上に
導入して、最後にそれらをすべて回収するので、有害な
石綿の破片が地中に残ることはなし).
発明の効果
以上述べたように本発明によると,破砕ヘッドにより既
設管を破砕しながらその破片を新管内の帯状体上に導入
し,その後に帯状体を新管外に引き出してこの帯状体上
の破片を回収するため、既設管の破片を地中に残さずに
これを回収することができることになって,既設管が石
綿管などの場合には特に有用である.By doing this, the existing pipe is crushed by the crushing head and its fragments are introduced onto the strip inside the new pipe, and then the strip is pulled out of the new pipe and the fragments on this strip are collected. Fragments of existing pipes will not remain underground. Therefore, it is especially useful when the existing pipe is an asbestos pipe. EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 6. In the construction method of this embodiment, a crushing head 1 as shown in Figs. 1 and 2 is used. This crushing head l is
A wedge-shaped flat blade portion 3 is provided at the front end of the cylindrical body portion 2,
A crushing blade 4 is formed on both sides of the blade part 3, and a fragment intake port 5 is opened at the front end of the body part 2. When using the crushing head l, a new pipe 7 is connected to the rear end of the body part 2 via a dummy pipe 6, and high-pressure water injection nozzles 8 are attached to both sides of the blade part 3. As shown in the figure, a cloth strip 9 is laid in the pipe from the dummy pipe 6 to the new pipe 7 so as to be extendable in the pipe axis direction. Both ends of the dummy tube 5 are removably connected to the body 2 and the new tube 7 via a joint 10. The new pipe 7 is, for example, a temporary pipe, such as a gas pipe. The strip 9 is a dummy tube 6
It is wound around a roller 11 provided inside the holder, stretches backward, and is wound up so that it can be unwound. Reference numeral 12 denotes a guide section provided within the body section 2, which guides the fragments onto the band-shaped body 9. Next, we will explain in detail the method for replacing the cable with new pipe 7. first,
As shown in FIG. 3, a starting hole 16 and a destination hole 17 are excavated at a certain distance along the existing underground pipeline 15 in which a plurality of asbestos pipes 13 are connected via gibold joints 14 underground. do. A propulsion jack 18 is installed in the launch shaft 16, and a high-pressure pump 19 and a winch 20 are installed on the ground on the side of the arrival shaft 17. Then, the crushing head l, dummy pipe 6 and new pipe 7 assembled as described above are placed on the propulsion jack l.
8 and the end of the buried pipe l5, and one end 9a of the strip 9 is appropriately fixed in the starting shaft 16. Then, connect the nozzle 8 and the high pressure pump 19 with the high pressure hose 2l,
Connect the wire rope 22 of the winch 20 to the tip of the blade 3 of the crushing head 1. Next, high-pressure water 23 is injected from the nozzle 8 into the crushing head 1 by the high-pressure pump l9, and while the winch 20 pulls and centers the blade part 3, the crushing head 1 is moved into the buried pipe l5 by the propulsion jack l8. Push it into one end. The crushing head 1 crushes the asbestos pipe 13 by the wedge action of the crushing blade 4.
The asbestos I moves forward while crushing the
The debris 24 of the rI 13, asbestos cement, collar, earth and sand of the gibold joint 14 are removed from the debris intake 5 through the guide part 1.
2 onto the strip 9. At this time, the high-pressure water 23 improves the fluidity of the fragments 24 and the like so that they can be smoothly introduced onto the strip 9. Furthermore, as shown in Figure 4, fragments of the gibold joint 14 remain underground, but this is not a problem because it is made of metal. Then, as shown in Fig. 4, as the crushing progresses, the band 9 is fed out and stretched, and new pipes 7 are successively added. Next, as shown in FIG. 5, after all asbestos pipes 13 are crushed and replaced with new pipes 7, the crushing head 1 and dummy pipe 6 are removed from the new pipe 7 in the reaching hole l7, and the high-pressure pump l9 and winch are removed. Remove 20. Finally, as shown in FIG.
Collect soil, sand, etc. Since the replaced new pipes 7 are temporary pipes, these temporary pipes are replaced with original new pipes using the subsequent propulsion method. In addition, in this example, the original new pipe 7 was used as a temporary pipe, but
It is also possible to use the original new pipe from the beginning instead of using it as a temporary pipe. According to the above construction method, the fragments 24 of the asbestos pipe 13 and the asbestos cement and collar of the gibold joint 14 are introduced onto the strip 9 and are all collected at the end, so that harmful asbestos fragments are buried underground. ). Effects of the Invention As described above, according to the present invention, the existing pipe is crushed by the crushing head and its fragments are introduced onto the band-like body inside the new pipe, and then the band-like body is pulled out of the new pipe and placed on the band-like body. This makes it possible to collect fragments of existing pipes without leaving them underground, which is particularly useful when the existing pipes are asbestos pipes.
第1図は本発明の工法に使用する破砕ヘッドの部分断面
図,第2図は第1図の破砕ヘッドの右側面図、第3図〜
第6図は本発明の工法の一実旅例を示す工程図である。
1・・・破砕ヘッド,7・・・新管、9・・・帯状体、
13・・・石綿管、l5・・・埋設管路(既設管),2
4・・・破片。
第5図
第6図Figure 1 is a partial sectional view of the crushing head used in the method of the present invention, Figure 2 is a right side view of the crushing head in Figure 1, and Figures 3-
FIG. 6 is a process diagram showing an example of the construction method of the present invention. 1... Crushing head, 7... New pipe, 9... Band-shaped body,
13... Asbestos pipe, l5... Buried pipe (existing pipe), 2
4...Fragments. Figure 5 Figure 6
Claims (1)
を管軸方向に伸長可能に設け、地中に埋設された既設管
の管路の一端から破砕ヘッドを押し込むことにより、前
記既設管を破砕しながらその破片を破砕ヘッドから帯状
体の上に導入し、破砕の進行にともなって新管を順次推
進させるとともに帯状体を伸長させ、ある程度の長さの
帯状体を伸長させて既設管の破片をその上に導入した後
に、この帯状体を新管外に引き出して、この帯状体の上
の破片を回収することを特徴とする既設管の非開削布設
替え工法。1. By connecting a new pipe to the rear end of the crushing head, installing a strip inside the new pipe so that it can extend in the pipe axis direction, and pushing the crushing head from one end of the existing pipe buried underground, While crushing the existing pipe, its fragments are introduced from the crushing head onto the band-shaped body, and as the crushing progresses, the new pipe is sequentially propelled and the band-shaped body is elongated to a certain length. This trenchless replacement method for existing pipes is characterized by introducing fragments of the existing pipe onto the existing pipe, then pulling this band-like body out of the new pipe, and collecting the fragments on the band-like body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1233757A JPH0396783A (en) | 1989-09-07 | 1989-09-07 | Non-cut exchanging method for laid pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1233757A JPH0396783A (en) | 1989-09-07 | 1989-09-07 | Non-cut exchanging method for laid pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0396783A true JPH0396783A (en) | 1991-04-22 |
Family
ID=16960102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1233757A Pending JPH0396783A (en) | 1989-09-07 | 1989-09-07 | Non-cut exchanging method for laid pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0396783A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006336396A (en) * | 2005-06-06 | 2006-12-14 | Sekisui Chem Co Ltd | Crushing device for metal joint of existing pipe |
-
1989
- 1989-09-07 JP JP1233757A patent/JPH0396783A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006336396A (en) * | 2005-06-06 | 2006-12-14 | Sekisui Chem Co Ltd | Crushing device for metal joint of existing pipe |
JP4662812B2 (en) * | 2005-06-06 | 2011-03-30 | 積水化学工業株式会社 | Equipment for crushing existing pipe metal fittings |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0674713B2 (en) | Method and device for replacing existing pipe with new pipe | |
JPH0396783A (en) | Non-cut exchanging method for laid pipe | |
JP2012117226A (en) | Construction method and apparatus for recovering existing pipe | |
JP2562938B2 (en) | How to replace an existing main with a new main | |
JPH0378513B2 (en) | ||
JP4183651B2 (en) | Pipe laying method | |
JP2604455B2 (en) | Existing pipe non-cutting cloth replacement equipment | |
JPH0432195B2 (en) | ||
JPH07154910A (en) | Method and device for removing useless cable laid in buried duct | |
JP4808561B2 (en) | Recovery method for existing buried pipes | |
JPH07150890A (en) | Propusion method for curved pipe line | |
JP2961767B2 (en) | Old pipe updating device | |
JP4383305B2 (en) | Device propelled in the ground to form a small-diameter tunnel and propulsion method using the same | |
JPH01250593A (en) | Replacement of buried piping | |
JP3519829B2 (en) | Underground pipe peripheral friction reduction method | |
JPS5927834B2 (en) | How to replace existing pipes | |
JP4160681B2 (en) | Propulsion steel pipe joint structure | |
RU2116546C1 (en) | Replacement of defective pipe line partially or fully filled with soil without digging-out trench | |
JPH0372196A (en) | Deteriorated pipe replacement method and operation machine | |
JP3875230B2 (en) | Shield excavator for branch tunnel construction | |
JP3242267B2 (en) | How to connect the pipe | |
JP2000038896A (en) | Method for laying underground pipeline | |
JPS62132083A (en) | Mehtod of transporting underground piping by non-drive | |
JPH0914510A (en) | Method of replacing existing buried pipe with new pipe | |
JPH10231954A (en) | Laying method for underground embedded pipe |