JP2534544B2 - Existing pipe laying replacement method - Google Patents
Existing pipe laying replacement methodInfo
- Publication number
- JP2534544B2 JP2534544B2 JP63182846A JP18284688A JP2534544B2 JP 2534544 B2 JP2534544 B2 JP 2534544B2 JP 63182846 A JP63182846 A JP 63182846A JP 18284688 A JP18284688 A JP 18284688A JP 2534544 B2 JP2534544 B2 JP 2534544B2
- Authority
- JP
- Japan
- Prior art keywords
- auger
- blade
- pipe
- existing pipe
- rod
- 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］ 本発明は地中に埋設した陶管、ヒューム管等の既設管
を、地上より開削することなく、新設管と取り替える、
既設管の敷設替え工法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention replaces an existing pipe such as a pottery pipe or a fume pipe buried in the ground with a new pipe without excavating from the ground.
This relates to the method of replacing the existing pipe.
［従来の技術］ 従来の既設管の敷設替え工法としては、第３図に示す
ように、先端がテーパー形状で既設管２より大きい外径
の胴部1aを有する堀削機１の後端に敷設替えすべき新設
管３を取り付け、図示しない発進立坑からジャッキで前
方へ圧入力を付勢し、前記掘削機１をワイヤロープ等の
ケーブル４で前方より牽引しつつ、エアホース５を介し
て後方より送る圧気により掘削機１内のエアハンマを作
動して堀削機１と新設管３とが共に前進して、堀削機１
の先端のテーパー部が既設管内へ入り込み、これを破砕
しつつ空隙を外方へおしひろげて既設管３を新設管２と
取り替える方法が開示されている。この場合、テーパー
部1bには外周より半径方向外側に向かって拡大する切削
刃1cが設けられており、これを油圧等により拡張し、既
設管の壁体を効果的に破砕するようになっている。[Prior Art] As a conventional installation replacement method for existing pipes, as shown in FIG. 3, at the rear end of the excavator 1 having a barrel-shaped tip 1a and an outer diameter 1a larger than that of the existing pipe 2, as shown in FIG. A new pipe 3 to be laid is installed, a pressure input is urged forward from a starting shaft (not shown) with a jack, and the excavator 1 is pulled from the front by a cable 4 such as a wire rope, and rearward via an air hose 5. The air hammer in the excavator 1 is actuated by the compressed air sent from the excavator 1 so that the excavator 1 and the new pipe 3 advance together.
There is disclosed a method of replacing the existing pipe 3 with the new pipe 2 by inserting the taper portion of the tip of the inside of the existing pipe into the existing pipe and crushing it to expand the gap outward. In this case, the tapered portion 1b is provided with a cutting blade 1c that expands outward from the outer periphery in the radial direction, and is expanded by hydraulic pressure or the like to effectively crush the wall of the existing pipe. There is.
また、第４図に示すように、堀削機本体11の前方に亀
頭状で既設管２の内径に合わせた取水装置12が連結さ
れ、前記堀削機本体11は、前面のスポーク形カッター11
aが回転駆動し、前記スポーク形カッター11aで破砕した
既設管と周囲の土砂を堀削機本体11に内蔵するクラッシ
ャーで破砕し、後方へ排出する。前記堀削機本体11の後
端には発進立坑のジャッキで前方へ圧入力を付勢された
新管３が接近して給進されている。既設管が下水管の場
合は、取水装置12の頭部から取水装置12内に入った汚水
は連結管13内を通り、堀削機本体11内を経て、汚水管14
から発進立坑に設けたポンプにより地上へ送られる。ま
た、スポーク形カッター11aの回転により破砕された既
設管２と土砂は送泥水管15で堀削機本体11内に送られた
泥水と混合されて排泥管16を経てポンプにより地上に排
出される。Further, as shown in FIG. 4, a water intake device 12 having a glans shape and adapted to the inner diameter of the existing pipe 2 is connected to the front of the excavator main body 11, and the excavator main body 11 includes a spoke cutter 11 on the front side.
a is driven to rotate, and the existing pipe crushed by the spoke cutter 11a and the surrounding earth and sand are crushed by a crusher built in the excavator main body 11 and discharged rearward. At the rear end of the excavator main body 11, a new pipe 3 biased forward by a jack of a starting shaft is pushed forward. If the existing pipe is a sewer pipe, the sewage that has entered the water intake device 12 from the head of the water intake device 12 passes through the connection pipe 13, the excavator main body 11 and the sewage pipe 14
Is sent to the ground by a pump installed in the starting shaft. The existing pipe 2 and the earth and sand crushed by the rotation of the spoke type cutter 11a are mixed with the muddy water sent into the excavator body 11 by the mud water pipe 15 and discharged to the ground by the pump through the mud pipe 16. It
［発明が解決しようとする課題］ しかるに、前記第３図に示す従来の堀削機による既設
管の敷設替え工法は、破砕した既設管の破片を周囲の土
砂と共に外方へおしひろげて圧密し、新設管を圧入する
方法であるので、圧密中に付近に埋設されているガス
管、ケーブル埋設管等を破損する恐れがあり、また、新
設管の周囲の土砂を圧密するので新管の径は既設管以下
のものとしか取り替えられないという欠点がある。[Problems to be Solved by the Invention] However, in the existing pipe laying replacement method by the conventional excavator shown in FIG. 3, the crushed fragments of the existing pipe are spread outward together with the surrounding earth and sand to consolidate them. However, since this is a method of press-fitting a new pipe, there is a risk of damaging gas pipes, cable buried pipes, etc. that are buried in the vicinity during consolidation, and since the soil around the new pipe is compacted, It has the drawback that the diameter can only be replaced with that of an existing pipe or less.
次に、第４図に示す従来の堀削機による既設管の敷設
替え工法は、既設管がヒューム管等の鉄筋の入った管の
場合は、堀削機の進行と共に鉄筋がスポーク形カッター
11aに巻き付いて前方に固まったり、たとえそこを通過
したとしても、クラッシャーの刃を破損する恐れがあ
り、さらに排泥管16内や図示しないポンプを通過するこ
とは困難であるので既設管が鉄筋の入らない陶管等の場
合にしか施工できないという欠点がある。Next, in the existing pipe laying replacement method by a conventional excavator shown in FIG. 4, when the existing pipe is a pipe containing reinforcing bars such as fume pipes, the reinforcing bars are spoke type cutters as the excavating machine progresses.
Even if it wraps around 11a and hardens forward, or even if it passes therethrough, the blade of the crusher may be damaged, and it is difficult to pass through the mud pipe 16 or a pump (not shown). It has the drawback that it can only be applied to cases such as ceramic pipes that do not fit inside.
本発明は上述した事情に鑑みてなされたものである。 The present invention has been made in view of the above circumstances.
［課題を解決するための手段］ 前記目的を達成するため、本発明の既設管の敷設替え
工法は、発進立坑から既設管中に螺旋部を有するオーガ
ーを回転・給進し、前記オーガーの先端が到達立坑へ貫
通した時、前記オーガーの発進立坑側端末にオーガー回
転伝達ロッドを連結し、該オーガー回転伝達ロッドの外
周には既設管の端面を切削する刃口を先端に装着した刃
口回転用ロッドを嵌挿し、さらに前記刃口回転用ロッド
外周にセンター保持具を介して、新設管を刃口基端まで
回転自在に嵌挿し、前記オーガーと前記刃口回転用ロッ
ドを発進立坑からそれぞれ別途に回転・給進して前記刃
口回転用ロッド先端の刃口で既設管を破砕しながら前記
新設管を給進し、前記新設管及びオーガーの給進にとも
ない到達立坑内に進出するオーガーは順次回収すると共
に、新設管が到達立坑に到達したら刃口を回収し、次に
前記オーガー回転伝達ロッド、刃口回転用ロッド及びセ
ンター保持具を発進立坑側へ引き抜き撤去することを特
徴とする。[Means for Solving the Problems] In order to achieve the above object, the existing pipe laying replacement method of the present invention is configured such that an auger having a spiral portion in the existing pipe is rotated and fed from a start shaft to a tip of the auger. When it penetrates into the reaching shaft, the auger rotation transmission rod is connected to the starting shaft side end of the auger, and the blade rotation for cutting the end face of the existing pipe at the tip is attached to the outer periphery of the auger rotation transmission rod. Insert the rod for rotation, further through the center retainer on the outer circumference of the rod for rotating the blade opening, insert a new pipe rotatably to the base end of the blade opening, and insert the auger and the rod for rotating the blade opening from the starting shaft respectively. An auger that separately rotates and feeds to crush the existing pipe at the blade tip of the rod for rotating the blade mouth, feeds the new pipe, and advances into the reaching shaft with the feeding of the new pipe and auger Is sequentially When the new pipe reaches the reaching shaft, the blade mouth is collected, and then the auger rotation transmission rod, the blade mouth rotating rod and the center holder are pulled out to the starting shaft side and removed.
［作用］ 最初に刃口が装着されるまでは、螺旋部を有するオー
ガーで既設管内が掃除されて、管内のものは発進立坑側
または到達立坑側へ排出される。また、前記オーガーが
ガイドとなって刃口が回転・給進し、既設管の破砕され
た破片と刃口周囲の土砂はオーガーの螺旋部で既設管内
を通り先方（到達立坑）へ排出される。[Operation] Until the blade is attached for the first time, the inside of the existing pipe is cleaned with an auger having a spiral portion, and the inside of the pipe is discharged to the starting shaft side or the reaching shaft side. Further, the blade rotates and feeds using the auger as a guide, and the crushed fragments of the existing pipe and the earth and sand around the blade pass through the existing pipe through the spiral portion of the auger and are discharged to the destination (reaching shaft). .
［実施例］ 以下、添付図に基づいて本発明の実施例を詳細に説明
する。Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
第１図（ａ）〜（ｅ）は本発明の既設管の敷設替え工
法の一実施例を示す工程図である。FIGS. 1 (a) to 1 (e) are process diagrams showing an embodiment of a method for replacing an existing pipe according to the present invention.
先ず、第１図（ａ）に示すように既設管２内に発進立
坑22から到達立坑23へ向けて螺旋部17aを有するオーガ
ー17を回転・給進する。この際オーガー17は、所定の長
さのものを発進立坑22内で順次継ぎ足して作業する。First, as shown in FIG. 1 (a), the auger 17 having the spiral portion 17a is rotated and fed from the starting shaft 22 to the reaching shaft 23 in the existing pipe 2. At this time, the auger 17 having a predetermined length is successively added in the starting shaft 22 for work.
次に、前記オーガー17先端が既設管途中の所定の位置
の時点、または到達立坑に到達した時点で第１図（ｂ）
に示すように、発進立坑側の螺旋部17aを有するオーガ
ー17基端にオーガー回転伝達ロッド17bを連結し、この
外周に先端に刃口18を装着した刃口回転用ロッド19を嵌
挿し、この外側にセンター保持具24を介して新設管３を
前記刃口18の基端まで嵌挿し、前記オーガー17と刃口回
転用ロッド19を別途に回転・給進して既設管２を破砕し
つつ、地盤を堀削すると共に、刃口18の進行に伴って新
設管３を給進する。この場合、オーガー17は前記既設管
２の破片と堀削した地盤の土砂を到達立坑へ排出する方
向に回転させる。この図では、ドリルヘッド20で刃口回
転用ロッド19を回転させると共に、この刃口回転用ロッ
ド19と新設管３を給進し、ドリルヘッド21でオーガー17
を回転・給進するようになっている。Next, when the tip of the auger 17 is at a predetermined position in the middle of the existing pipe, or when it reaches the reaching shaft, FIG. 1 (b).
As shown in, the auger rotation transmission rod 17b is connected to the auger 17 base end having the spiral portion 17a on the starting shaft side, and the blade opening rotation rod 19 having the blade opening 18 attached to the tip is inserted into the outer periphery of the auger rotation transmission rod 17b. While inserting the new pipe 3 to the base end of the blade opening 18 through the center holder 24 on the outer side, separately rotating and feeding the auger 17 and the blade opening rotating rod 19 to crush the existing pipe 2. , The ground is excavated, and the new pipe 3 is fed as the blade 18 advances. In this case, the auger 17 is rotated in a direction in which the fragments of the existing pipe 2 and the earth and sand excavated in the ground are discharged to the reaching shaft. In this figure, the blade head rotating rod 19 is rotated by the drill head 20, and the blade hole rotating rod 19 and the new pipe 3 are advanced, and the drill head 21 is used to drive the auger 17
It is designed to rotate and feed.
前記作業は第１図（ｃ）に示すように、発進立坑22内
で所定長さのオーガー回転伝達ロッド17bと刃口回転用
ロッド19の外周にセンター保持具24を介して所定長さの
新設管３を嵌挿して一組とし、発進立坑22内で順次継ぎ
足していくものであって、これに伴って到達立坑23側に
は螺旋部17aを有するオーガー17が進出するのでこれを
接手の筒所で順次切り離して撤去する。As shown in FIG. 1 (c), the above work is performed by newly installing a predetermined length on the outer circumference of the auger rotation transmitting rod 17b and the blade rotating rod 19 having a predetermined length in the starting shaft 22. The pipes 3 are fitted and inserted into one set, and they are successively added in the starting shaft 22. With this, the auger 17 having the spiral portion 17a advances to the reaching shaft 23 side. Separate and remove at the place.
次に、第１図（ｄ）に示すように、刃口18が到達立坑
側に出現したらこれを取り外し、第１図（ｅ）に示すよ
うにオーガー回転伝達ロッド17b、刃口回転用ロッド19
及びセンター保持具24を順次発進立坑22側に引き抜いて
撤去することにより、新設管３のみが地盤中に残って作
業が完了する。Next, as shown in FIG. 1 (d), when the blade tip 18 appears on the reaching shaft side, it is removed, and as shown in FIG. 1 (e), the auger rotation transmission rod 17b and the blade tip rotation rod 19 are provided.
And, the center holder 24 is sequentially pulled out to the side of the starting shaft 22 and removed, so that only the new pipe 3 remains in the ground and the work is completed.
なお、第２図に示すように、本発明の既設管の敷設替
え工法によれば、例えばこれを下水管の敷設替えに適用
すれば、下水を使用中に、既設管と取り替えることがで
きる。図によって説明すれば、敷設替え区間は汚水をオ
ーガー17中を通すことができるので、到達立坑23内はウ
ォータースイベル25を介して既設管端内のパッカー26と
ホース27で連結して汚水を通し、発進立坑22内は削孔機
28の中空軸28a内を通り、ウォータースイベル29を介し
て汚水バック30に汚水を流入させ、新設管３へ流入する
ようにすることにより、下水を使用中に敷設替えをする
ことができる。As shown in FIG. 2, according to the existing pipe laying replacement method of the present invention, if this is applied to the laying replacement of the sewer pipe, the sewage can be replaced with the existing pipe during use. Explaining it with the drawing, since the sewage can be passed through the auger 17 in the replacement section, the inside of the reaching shaft 23 is connected with the packer 26 and the hose 27 in the existing pipe end through the water swivel 25 to pass the sewage. , Drilling machine inside the starting shaft 22
By passing the sewage into the sewage bag 30 via the water swivel 29 through the hollow shaft 28a of 28 and flowing into the new pipe 3, the sewage can be replaced during use.
［発明の効果］ 以上説明したように、本発明の既設管の敷設替え工法
によれば次の如き効果を奏する。[Effects of the Invention] As described above, according to the laying replacement method for an existing pipe of the present invention, the following effects are achieved.
第３図に示す従来の工法に比べ、本発明は付近に埋
設されているガス管、ケーブル埋設管等を破損する恐れ
がない。また管を使用中でも施工が可能である。Compared with the conventional construction method shown in FIG. 3, the present invention has no risk of damaging gas pipes, cable burying pipes, etc. buried in the vicinity. Moreover, construction is possible even while using the pipe.
第４図に示す従来の工法に比べると、本発明はヒュ
ーム管等の鉄筋の入った既設管を破砕する場合、鉄筋は
オーガー基端の刃口先端付近から次第に螺旋部にそって
先方に巻き付いていくが、その量が一定量以上になった
時、オーガーを到達立坑側へ引き抜いて取り外すように
すれば、鉄筋の入った既設管でも敷設替えすることが可
能であり、また、堀削機内にクラッシャーや原動機等を
内蔵しないので、構造が簡単である。さらに施工中に堀
削機内のクラッシャーや原動機等が故障すると、従来の
ものは修理が困難であるが、本発明の工法によれば回転
・給進用の機械は立坑内にあるので修理が簡単でしかも
故障頻度が少ないので作業能率が上る。その上、さらに
本発明の工法は水を使用しない乾式工法であるので、ポ
ンプ類が不要であり、泥土による公害の発生がない。Compared with the conventional construction method shown in FIG. 4, in the present invention, when crushing an existing pipe containing a reinforcing bar such as a fume pipe, the reinforcing bar is gradually wound around the spiral part from the vicinity of the tip of the blade end at the base end of the auger. However, when the amount exceeds a certain amount, if the auger is pulled out to the arriving shaft side and removed, it is possible to replace the existing pipe with reinforcing bars and also to replace it inside the excavator. Since there is no crusher or prime mover built in, the structure is simple. Furthermore, if the crusher or prime mover in the excavator breaks down during construction, it is difficult to repair the conventional one, but the method of the present invention makes it easy to repair because the rotating / feeding machine is in the shaft. Moreover, since the frequency of breakdowns is low, work efficiency increases. Moreover, since the construction method of the present invention is a dry construction method that does not use water, no pumps are required and no pollution occurs due to mud.
第１図（ａ）〜（ｅ）は本発明の既設管の敷設替え工法
の一実施例を示す工程図、第２図は配管を使用中に本発
明工法を施工する場合の概略を説明する平面図、第３図
及び第４図は従来の工法を示す説明図である。 ２……既設管、３……新設管、17……オーガー、17a…
…螺旋部、17b……オーガー回転伝達ロッド、18……刃
口、19……刃口回転用ロッド、22……発進立坑、23……
到達立坑、24……センター保持具。1 (a) to 1 (e) are process diagrams showing an embodiment of a method for laying and replacing an existing pipe according to the present invention, and FIG. 2 shows an outline of a case where the present method is applied while using a pipe. Plan views, FIG. 3 and FIG. 4 are explanatory views showing a conventional construction method. 2 ... Existing pipe, 3 ... New pipe, 17 ... Auger, 17a ...
… Spiral part, 17b …… Auger rotation transmission rod, 18 …… Blade, 19 …… Blade rotating rod, 22 …… Starting shaft, 23 ……
Reaching shaft, 24 …… Center holder.
Claims (1)
ーガーを回転・給進し、前記オーガーの先端が到達立坑
へ貫通した時、前記オーガーの発進立坑側端末にオーガ
ー回転伝達ロッドを連結し、該オーガー回転伝達ロッド
の外周には既設管の端面を切削する刃口を先端に装着し
た刃口回転用ロッドを嵌挿し、さらに前記刃口回転用ロ
ッド外周にセンター保持具を介して、新設管を刃口基端
まで回転自在に嵌挿し、 前記オーガーと前記刃口回転用ロッドを発進立坑からそ
れぞれ別途に回転・給進して前記刃口回転用ロッド先端
の刃口で既設管を破砕しながら前記新設管を給進し、 前記新設管及びオーガーの給進にともない到達立坑内に
進出するオーガーは順次回収すると共に、新設管が到達
立坑に到達したら刃口を回収し、 次に前記オーガー回転伝達ロッド、刃口回転用ロッド及
びセンター保持具を発進立坑側へ引き抜き撤去すること
を特徴とする既設管の敷設替え工法。1. An auger rotation transmission rod is connected to a starting shaft side end of the auger when the auger having a spiral portion in the existing pipe is rotated and fed from the starting shaft and the tip of the auger penetrates into the reaching shaft. Then, on the outer circumference of the auger rotation transmission rod, a blade opening rotating rod having a blade opening for cutting the end face of the existing pipe attached to the tip is inserted and further, via a center holder on the outer periphery of the blade opening rotating rod, A new pipe is rotatably inserted to the base end of the blade mouth, and the auger and the rod for rotating the blade mouth are separately rotated and fed from the starting shaft, and the existing pipe is attached to the blade at the tip of the rod for rotating the blade mouth. Feeding the new pipe while crushing, auger that advances into the reaching vertical shaft with the advance of the new pipe and auger is sequentially collected, and when the new pipe reaches the reaching vertical shaft, the blade mouth is collected, then The auger Rotation transmitting rod, laying replacement method of the existing pipe, characterized in that the pulling removing the cutting edge rotational rod and the center retainer to the starting pit side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182846A JP2534544B2 (en) | 1988-07-22 | 1988-07-22 | Existing pipe laying replacement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63182846A JP2534544B2 (en) | 1988-07-22 | 1988-07-22 | Existing pipe laying replacement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0235286A JPH0235286A (en) | 1990-02-05 |
| JP2534544B2 true JP2534544B2 (en) | 1996-09-18 |
Family
ID=16125482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63182846A Expired - Lifetime JP2534544B2 (en) | 1988-07-22 | 1988-07-22 | Existing pipe laying replacement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534544B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102252070B1 (en) * | 2021-02-19 | 2021-05-13 | 임부식 | Old underground buried pipe replacement device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2586959B2 (en) * | 1990-07-17 | 1997-03-05 | 東亜グラウト工業株式会社 | How to update the pipeline |
| JP2020139364A (en) * | 2019-03-01 | 2020-09-03 | 機動建設工業株式会社 | Reconstruction method of existing pipeline |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153896A (en) * | 1982-03-05 | 1983-09-13 | 株式会社加賀田組 | Acceleration of advance of soft and weak pipe |
| JPS6353381A (en) * | 1986-08-20 | 1988-03-07 | 株式会社クボタ | Laying changer for existing pipe |
-
1988
- 1988-07-22 JP JP63182846A patent/JP2534544B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102252070B1 (en) * | 2021-02-19 | 2021-05-13 | 임부식 | Old underground buried pipe replacement device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0235286A (en) | 1990-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5580188A (en) | Method for replacing buried pipe | |
| MXPA98000447A (en) | Method for the replacement of pipe enterr | |
| JP2534544B2 (en) | Existing pipe laying replacement method | |
| JP3874095B2 (en) | Wellhead formation method and shield machine when reaching shield machine | |
| JP2582719B2 (en) | Piling method and casing pipe used in the method | |
| JPH0730674B2 (en) | Existing pipe laying replacement method | |
| JPH0730673B2 (en) | Existing pipe laying replacement method | |
| JP3581336B2 (en) | Extraction method of existing pile and drilling casing used for it | |
| JP2647692B2 (en) | Underground pipe laying replacement method and equipment | |
| JPH0730675B2 (en) | Existing pipe laying replacement method | |
| JPH10195873A (en) | Existing structure recovery method and apparatus in all casing construction method | |
| JPH04213694A (en) | Jacking method of buried pipe without earth removal | |
| JP3187326B2 (en) | Vertical drilling machine | |
| JP2860451B2 (en) | Shield machine | |
| JP2578184B2 (en) | Ring drilling rig | |
| JPH0230890A (en) | Method and apparatus for replacing of underground buried pipe | |
| JP5396454B2 (en) | Excavator | |
| JP2631816B2 (en) | Unnecessary buried pipe removal and restoration method | |
| JP5058965B2 (en) | Existing pipe reconstruction promotion method and equipment | |
| JP3517126B2 (en) | Underground pipe renewal method and underground excavation device | |
| JP3161691B2 (en) | Underground buried body drilling equipment | |
| JP3366241B2 (en) | Underground pipe laying method and apparatus | |
| JP3137731B2 (en) | Existing tunnel removal shield machine | |
| JPH042160B2 (en) | ||
| JP3137743B2 (en) | Existing tunnel removal shield machine |