JP2000017988A - Method and jig for laying pipe made of synthetic resin - Google Patents
Method and jig for laying pipe made of synthetic resinInfo
- Publication number
- JP2000017988A JP2000017988A JP10190744A JP19074498A JP2000017988A JP 2000017988 A JP2000017988 A JP 2000017988A JP 10190744 A JP10190744 A JP 10190744A JP 19074498 A JP19074498 A JP 19074498A JP 2000017988 A JP2000017988 A JP 2000017988A
- Authority
- JP
- Japan
- Prior art keywords
- jig
- shaft
- propulsion
- diameter
- reamer
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ガスなどの配
管に用いる合成樹脂製管を非開削で地中に敷設するため
の合成樹脂製管の敷設方法および治具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a jig for laying synthetic resin pipes used for pipes of city gas or the like in the ground without cutting.
【０００２】[0002]
【従来の技術】従来から図５および図６に示すような推
進工法で、ポリエチレンなどの合成樹脂製管が地中に敷
設されている。図５は基本的な合成樹脂製管の敷設方法
の概要を示し、図６はプレリーミング工程を含む合成樹
脂製管の敷設方法の概要を示す。2. Description of the Related Art Conventionally, synthetic resin pipes such as polyethylene have been laid underground by a propulsion method as shown in FIGS. FIG. 5 shows an outline of a basic method of laying a synthetic resin pipe, and FIG. 6 shows an outline of a method of laying a synthetic resin pipe including a pre-reaming step.
【０００３】図５（１）に示すように、推進工法では、
地盤１に間隔をあけて２つのピット、すなわち発進立坑
２および到達立坑３を掘削し、発進立坑２と到達立坑３
との間に非開削で管を埋設する。まず発進立坑２側か
ら、推進ロッド４が地盤１中に押し込まれる。推進ロッ
ド４は、一定の長さの鋼管の先端に推進ヘッド５を装着
し、根元側に推進ロッド４を順次継ぎ足しながら、推進
機６によって地盤１中に押し込まれる。推進ヘッド５か
らは地盤１中に泥水などが噴射され、軟らかくしながら
押し込まれる。推進機６は、地表に設置する場合もあ
り、また発進立坑２内に設置する場合もある。[0005] As shown in FIG. 5 (1), in the propulsion method,
Two pits, a starting shaft 2 and a reaching shaft 3, are excavated at an interval on the ground 1, and a starting shaft 2 and a reaching shaft 3 are excavated.
The pipe is buried without excavation. First, the propulsion rod 4 is pushed into the ground 1 from the starting shaft 2 side. The propulsion rod 4 is pushed into the ground 1 by the propulsion device 6 while attaching the propulsion head 5 to the tip of a steel pipe having a certain length and sequentially adding the propulsion rod 4 to the root side. Muddy water or the like is injected from the propulsion head 5 into the ground 1 and is pushed in while being soft. The propulsion device 6 may be installed on the ground surface, or may be installed in the starting shaft 2.
【０００４】図５（２）に示すように、推進ロッド４の
先端が到達立坑３内に到達すると、先端にはリーマ７が
装着される。リーマ７の後部には、さらに合成樹脂製管
であるポリエチレン（以下、「ＰＥ」と略称する）管８
が連結される。推進機６によって推進ロッド４を引込む
と、リーマ７とともにＰＥ管８は地盤１中に引込まれ
る。推進機６は継ぎ足されて長くなっている推進ロッド
４を、順次取外しながら、リーマ７およびＰＥ管８の引
込みを続ける。ＰＥ管８の先端が発進立坑２内に到達す
ると、発進立坑２と到達立坑３との間でのＰＥ管８の敷
設が完了する。[0005] As shown in FIG. 5 (2), when the tip of the propulsion rod 4 reaches the reaching shaft 3, a reamer 7 is attached to the tip. A polyethylene (hereinafter abbreviated as “PE”) tube 8 which is a synthetic resin tube is provided at the rear of the reamer 7.
Are linked. When the propulsion rod 4 is retracted by the propulsion device 6, the PE pipe 8 is retracted into the ground 1 together with the reamer 7. The propulsion device 6 continues to pull in the reamer 7 and the PE pipe 8 while sequentially removing the propulsion rod 4 that has been extended by extension. When the tip of the PE pipe 8 reaches the start shaft 2, the laying of the PE pipe 8 between the start shaft 2 and the reaching shaft 3 is completed.
【０００５】図６は、図５（２）でリーマ７を推進ロッ
ド４の先端に装着した後で、直ちにＰＥ管８を引込まな
いで、予備的な拡径であるプレリーミングを行ってから
ＰＥ管８の引込みを行う手順を示す。このようなプレリ
ーミングは、ＰＥ管８の径が大きいときや、地盤１が固
いときなどに必要となる。図６（１）では、リーマ７に
延長ロッド９を装着する。延長ロッド９の長さは、最終
的に発進立坑２から到達立坑３までの距離の長さ以上必
要となる。ただし、推進ロッド４と延長ロッド９とを共
用するときには、推進ロッド４を引込んで取外したロッ
ドを、延長ロッド９の後端につないで延長することがで
きる。FIG. 6 shows that after the reamer 7 is attached to the distal end of the propulsion rod 4 in FIG. 5 (2), the pre-reaming, which is a preliminary expansion, is performed without pulling in the PE tube 8 immediately. A procedure for retracting the PE pipe 8 will be described. Such pre-reaming is necessary when the diameter of the PE pipe 8 is large or when the ground 1 is hard. In FIG. 6A, the extension rod 9 is attached to the reamer 7. The length of the extension rod 9 needs to be longer than the distance from the starting shaft 2 to the reaching shaft 3 finally. However, when the propulsion rod 4 and the extension rod 9 are used in common, the rod removed by pulling in the propulsion rod 4 can be connected to the rear end of the extension rod 9 and extended.
【０００６】図６（２）では到達立坑３から発進立坑２
にリーマ７および延長ロッド９を引込んだ状態を示す。
リーマ７が地盤１中を引込まれているので、地盤１中に
は坑道１０が形成されている。図６（３）に示すよう
に、発進立坑２に到達した推進ロッド４と延長ロッド９
との間のリーマ７を取外し、推進ロッド４と延長ロッド
９とを直接接続し、延長ロッド９の後端にリーマ７を装
着する。すなわち、リーマ７の位置を取換える。リーマ
７の後部には、図６（４）に示すように、ＰＥ管８が連
結され、推進ロッド４および延長ロッド９を引込んで、
リーマ７とともにＰＥ管８を地盤１中に埋設することが
できる。すなわち、図６（２）でリーマ７によるプレリ
ーミングを行い、図６（４）ではリーマ７で坑道１０を
拡げながら、ＰＥ管８の引込みを行う。[0006] In FIG. 6 (2), the starting shaft 2 extends from the reaching shaft 3.
Shows a state where the reamer 7 and the extension rod 9 are retracted.
Since the reamer 7 is retracted in the ground 1, a tunnel 10 is formed in the ground 1. As shown in FIG. 6 (3), the propulsion rod 4 and the extension rod 9 reaching the starting shaft 2
Is removed, the propulsion rod 4 and the extension rod 9 are directly connected, and the reamer 7 is attached to the rear end of the extension rod 9. That is, the position of the reamer 7 is exchanged. As shown in FIG. 6 (4), a PE pipe 8 is connected to the rear part of the reamer 7, and the propulsion rod 4 and the extension rod 9 are retracted.
The PE pipe 8 can be buried in the ground 1 together with the reamer 7. That is, in FIG. 6 (2), the pre-reaming is performed by the reamer 7, and in FIG.
【０００７】[0007]
【発明が解決しようとする課題】図６に示すように、プ
レリーミングを伴うＰＥ管８の非開削敷設工法では図６
（２）に示すように、リーマ７に延長ロッド９を連結し
て、プレリーミングを行っている。さらに、図６（３）
に示すように、リーマ７が到達立坑３に到達したら、リ
ーマ７を取外して到達立坑３側の延長ロッド９の後端に
リーマ７を装着し、さらにリーマ７の後方にＰＥ管８を
装着して、再び坑道１０内を拡げながらＰＥ管８の敷設
を行う。このため、リーマ７の付換えや、リーマ７を外
して推進ロッド４に延長ロッド９を直接接続するような
作業を必要とする。したがって、推進ロッド４への延長
ロッド９の接続や、リーマ７の付換え作業が作業能率を
低下させてしまう。As shown in FIG. 6, in the method of laying a PE pipe 8 with pre-reaming without digging, as shown in FIG.
As shown in (2), the extension rod 9 is connected to the reamer 7 to perform pre-reaming. Further, FIG.
When the reamer 7 reaches the reaching shaft 3, as shown in Fig. 7, the reamer 7 is removed, the reamer 7 is attached to the rear end of the extension rod 9 on the reaching shaft 3 side, and the PE pipe 8 is attached behind the reamer 7. Then, the PE pipe 8 is laid while the inside of the tunnel 10 is expanded again. For this reason, it is necessary to replace the reamer 7 and to remove the reamer 7 and directly connect the extension rod 9 to the propulsion rod 4. Therefore, the connection of the extension rod 9 to the propulsion rod 4 and the replacement of the reamer 7 reduce the work efficiency.
【０００８】本発明の目的は、プレリーミングを伴う推
進工法で作業能率を向上させることができる合成樹脂製
管の敷設方法および治具を提供することである。[0008] An object of the present invention is to provide a method and a jig for laying a synthetic resin pipe, which can improve work efficiency by a propulsion method involving pre-reaming.
【０００９】[0009]
【課題を解決するための手段】本発明は、推進工法を用
いて地中に非開削で合成樹脂製管を敷設する際に、発進
立坑から到達立坑に推進ロッドを推進させ、推進ロッド
の先端が到達立坑に到達したら、推進ロッドの先端に前
後方向で使用可能な拡径治具を装着して、拡径治具が発
進立坑に到達するまで推進ロッドを引込み、発進立坑に
拡径治具が到達した後で、拡径治具を先端に装着した状
態の推進ロッドを、再度到達立坑に向けて押し戻し、推
進ロッドの先端が到達立坑に到達したら、合成樹脂製管
を拡径治具に連結して、拡径治具とともに到達立坑から
発進立坑まで推進ロッドによって引込むことを特徴とす
る合成樹脂製管の敷設方法である。SUMMARY OF THE INVENTION According to the present invention, a propulsion rod is propelled from a starting shaft to a reaching shaft when a synthetic resin pipe is laid in the ground without cutting using a propulsion method. After reaching the arrival shaft, attach a diameter expansion jig that can be used in the front-rear direction to the tip of the propulsion rod, retract the propulsion rod until the diameter expansion jig reaches the start shaft, and expand the jig into the start shaft. After reaching, the propulsion rod with the expanding jig attached to the tip is pushed back toward the reaching shaft again, and when the tip of the propelling rod reaches the reaching shaft, the synthetic resin pipe is inserted into the expanding jig. This is a method of laying a synthetic resin pipe, wherein the pipe is connected and pulled in from a reaching shaft to a starting shaft together with an expanding jig by a propulsion rod.
【００１０】本発明に従えば、推進工法を用いて地中に
非開削で合成樹脂製管を敷設する際に、発進立坑および
到達立坑を掘削しておく。発進立坑から到達立坑に先ず
推進ロッドを推進させ、到達立坑に到達した推進ロッド
の先端には前後方向で使用可能な拡径治具を装着する。
推進ロッドは、拡径治具が発進立坑に到達するまで引込
まれ、プレリーミングとして地盤中には坑道が形成され
る。地盤中の坑道内を、拡径治具を先端に装着した状態
の推進ロッドを、再度到達立坑に向けて押し戻す。推進
ロッドの先端に装着されている拡径治具は、推進ロッド
を引込む際の前方ばかりではなく、後方にも使用可能で
あるので推進ロッドを先端が到達立坑に到達するまで容
易に押し戻すことができる。推進ロッドの先端が到達立
坑に到達したら、拡径治具に合成樹脂製管を連結し、合
成樹脂製管を拡径治具とともに到達立坑から発進立坑ま
で引込む。拡径治具が２回坑道の径を拡げるので、地盤
が固いときや、合成樹脂製管の径が大きいときであって
も、合成樹脂製管を地盤中に引込むことができる。According to the present invention, a starting shaft and a reaching shaft are excavated when a synthetic resin pipe is laid without excavation in the ground using a propulsion method. First, the propulsion rod is propelled from the starting shaft to the reaching shaft, and a diameter increasing jig usable in the front-rear direction is attached to the tip of the propelling rod reaching the reaching shaft.
The propulsion rod is retracted until the expanding jig reaches the starting shaft, and a tunnel is formed in the ground as pre-reaming. The propulsion rod with the diameter-expanding jig attached to the tip is pushed back into the shaft in the ground again toward the reaching shaft. The expanding jig attached to the tip of the propulsion rod can be used not only in front of the retracting rod but also in the rear, so it is easy to push the propulsion rod back until the tip reaches the reaching shaft. it can. When the tip of the propulsion rod reaches the reaching shaft, the synthetic resin tube is connected to the expanding jig, and the synthetic resin tube is drawn from the reaching shaft to the starting shaft together with the expanding jig. Since the diameter-expanding jig expands the diameter of the tunnel twice, even when the ground is hard or the diameter of the synthetic resin pipe is large, the synthetic resin pipe can be drawn into the ground.
【００１１】さらに本発明は、推進工法で、推進ロッド
の先端に装着して、合成樹脂製管を地中に引込むために
用いる治具であって、推進ロッドの先端に装着されて、
推進ロッドによって地中に引込まれる際の移動方向の前
方となる側が、推進ロッドの推進時に地盤に形成される
坑道の径を拡大させる拡径部として形成され、該移動方
向の後方となる側が、推進ロッドを押し戻す際に受ける
地盤からの抵抗力を軽減する形状を有し、かつ合成樹脂
製管が連結可能であることを特徴とする合成樹脂製管の
敷設治具である。Further, the present invention relates to a jig which is attached to the tip of a propulsion rod by a propulsion method and is used for drawing a synthetic resin pipe into the ground.
The side that is forward in the moving direction when being pulled into the ground by the propulsion rod is formed as a diameter-enlarging portion that enlarges the diameter of a tunnel formed on the ground when the propulsion rod is propelled, and the side that is rearward in the moving direction is A jig for laying a synthetic resin pipe, wherein the jig has a shape for reducing a resistance force from the ground received when the propulsion rod is pushed back, and is connectable to a synthetic resin pipe.
【００１２】本発明に従えば、推進工法で推進ロッドの
先端に用いる治具を、推進ロッドを引込む際移動方向の
前方となる側が、推進ロッドの推進時に地盤に形成され
る坑道の径を拡大させる拡径部として形成されるので、
推進ロッドの先端に装着して地中に引込むことによっ
て、坑道を拡げることができる。治具の拡径部の反対側
は、推進ロッドを押し戻す際に受ける地盤からの抵抗力
を軽減する形状に形成されるので、１度プレリーミング
を行った後、坑道内に押し戻して、発進立坑から到達立
坑内に逆方向に移動させることができる。逆方向に移動
して到達立坑に到達した治具の後端には、合成樹脂製管
を連結して、坑道内を拡げながら合成樹脂製管を地中に
引込むことができるので、プレリーミングを伴う推進工
法による合成樹脂製管の敷設に用いて作業効率を向上さ
せることができる。According to the present invention, the jig used at the tip of the propulsion rod in the propulsion method, the front side in the moving direction when the propulsion rod is retracted increases the diameter of the tunnel formed on the ground when the propulsion rod is propelled. Since it is formed as an enlarged diameter part
By attaching to the tip of the propulsion rod and retracting it into the ground, the tunnel can be expanded. The opposite side of the expanded part of the jig is formed in a shape that reduces the resistance from the ground received when pushing back the propulsion rod, so after performing pre-reaming once, push back into the tunnel and start the shaft. Can be moved in the opposite direction into the arrival shaft. A synthetic resin tube is connected to the rear end of the jig that has reached the reaching shaft by moving in the opposite direction, and the synthetic resin tube can be pulled into the ground while expanding the tunnel, so pre-reaming is performed. The work efficiency can be improved by laying synthetic resin pipes by the accompanying propulsion method.
【００１３】[0013]
【発明の実施の形態】図１は、本発明の実施の一形態と
しての概略的な地中埋設管の敷設手順を示す。図１
（１）は、図５（１）および（２）に示すようにして地
盤２１に間隔をあけて掘削した発進立坑２２から到達立
坑２３に、推進ロッド２４の先端を到達させ、推進ロッ
ド２４の先端に治具２５を後部に取付けてあるリーマ２
７を装着した状態を示す。図１（２）は、図１（１）で
先端にリーマ２７を装着した推進ロッド２４を、発進立
坑２２側に引込んで、地盤２１中に坑道３０を形成して
いる状態を示す。坑道３０は、最終的にＰＥ管を引込む
ためには径が小さく、プレリーミングとして形成され
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic procedure for laying an underground pipe as an embodiment of the present invention. FIG.
(1) causes the tip of the propulsion rod 24 to reach the reaching shaft 23 from the starting shaft 22 excavated at intervals in the ground 21 as shown in FIGS. Reamer 2 with jig 25 attached to the end at the rear
FIG. FIG. 1 (2) shows a state in which the propulsion rod 24 with the reamer 27 attached to the tip in FIG. 1 (1) is drawn into the starting shaft 22 side to form the tunnel 30 in the ground 21. The tunnel 30 has a small diameter and is formed as pre-reaming in order to finally draw in the PE pipe.
【００１４】図１（３）では、治具２５を後部に取付け
てあるリーマ２７を、推進ロッド２４の先端に装着した
まま、発進立坑２２から到達立坑２３側に押し戻した状
態を示す。坑道３０内には土砂や泥が堆積しており、治
具２５を先端にしてリーマ２７を押し戻すことによっ
て、到達立坑２３内に押し出すことができる。FIG. 1C shows a state in which the reamer 27 with the jig 25 attached to the rear portion is pushed back from the starting shaft 22 to the reaching shaft 23 while being attached to the tip of the propulsion rod 24. Earth and sand and mud are deposited in the tunnel 30, and can be pushed into the reaching shaft 23 by pushing back the reamer 27 with the jig 25 as a tip.
【００１５】図１（４）では、到達立坑２３側に到達し
たリーマ２７の後端に、ＰＥ管３８を連結し、推進ロッ
ド２４を発進立坑２２側に引込んでいる状態を示す。リ
ーマ２７によって、坑道３０の径はさらに拡げられ、Ｐ
Ｅ管３８が地盤２１中に引込まれて、到達立坑２３から
発進立坑２２間の地中に非開削で敷設される。ＰＥ管３
８を、リーマ２７の後部に接続する際には、治具２５を
取外し、ＰＥ管３８を接続するためのスイベル継手など
を取付ける。FIG. 1D shows a state in which a PE pipe 38 is connected to the rear end of the reamer 27 that has reached the reaching shaft 23 side, and the propulsion rod 24 is drawn into the starting shaft 22 side. The diameter of the tunnel 30 is further expanded by the reamer 27,
The E pipe 38 is drawn into the ground 21, and is laid without excavation in the ground between the reaching shaft 23 and the starting shaft 22. PE pipe 3
When connecting 8 to the rear part of the reamer 27, the jig 25 is removed, and a swivel joint or the like for connecting the PE pipe 38 is attached.
【００１６】図２は、本発明の実施の他の形態として、
図１のリーマ２７および治具２５の組合せの代わりに用
いる拡径治具４０の形状を示す。拡径治具４０では、図
１に示すような推進ロッド２４の先端側に接続される前
方から、ＰＥ管３８を連結する後方にかけて、小径リー
マ部４１、大径リーマ部４２および圧密部４３が順次形
成される。拡径治具４０の中心部には、軸４４が形成さ
れ、軸４４の後端にはねじ部４５が設けられる。ねじ部
４５には、スイベル継手４６が装着可能であり、スイベ
ル継手４６でＰＥ管３８への接続を行うことができる。FIG. 2 shows another embodiment of the present invention.
2 shows a shape of a diameter-expanding jig 40 used in place of the combination of the reamer 27 and the jig 25 in FIG. 1. In the diameter-enlargement jig 40, the small-diameter reamer 41, the large-diameter reamer 42 and the consolidation part 43 extend from the front connected to the distal end of the propulsion rod 24 to the rear connected to the PE pipe 38 as shown in FIG. Formed sequentially. A shaft 44 is formed at the center of the diameter increasing jig 40, and a screw portion 45 is provided at a rear end of the shaft 44. A swivel joint 46 can be attached to the screw portion 45, and connection to the PE pipe 38 can be made with the swivel joint 46.
【００１７】小径リーマ部４１および大径リーマ部４２
には推進ロッド２４によって引込まれる際に地盤２１を
軟化させるために、泥水などを噴射するノズル４７，４
８がそれぞれ設けられる。また圧密部４３は、大略的に
円錐台形状であり、傾斜のついた円錐面で小径リーマ部
４１および大径リーマ部４２に拡げられた坑道３０の表
面を押し固める。圧密部４３は推進ロッド２４によって
引込まれる際の進行方向となる前方ばかりではなく、後
方に部分的な円錐面を形成している。この部分的な円錐
面によって、推進ロッド２４を再び押し込んで、拡径治
具４０を図１（２）に示すプレリーミング終了の状態か
ら図１（３）に示す状態まで押し戻す際に、坑道３０内
で受ける抵抗力を軽減させることができる。Small diameter reamer 41 and large diameter reamer 42
In order to soften the ground 21 when it is pulled in by the propulsion rod 24, nozzles 47 and 4 for injecting muddy water are used.
8 are provided respectively. The consolidating portion 43 is substantially in the shape of a truncated cone, and consolidates the surface of the tunnel 30 that has been expanded to the small-diameter reamer portion 41 and the large-diameter reamer portion 42 with an inclined conical surface. The consolidation part 43 forms a partial conical surface not only in the forward direction, which is the traveling direction when retracted by the propulsion rod 24, but also in the rear. When the propulsion rod 24 is pushed again by this partial conical surface and the diameter expanding jig 40 is pushed back from the pre-reaming end state shown in FIG. 1B to the state shown in FIG. The resistance received inside can be reduced.
【００１８】本実施形態の拡径治具４０では、圧密部４
３からオーバカッタ４９を突出させ、圧密部４３の外径
よりも大きな径で坑道３０を掘削することができる。本
実施形態の拡径治具４０を用いると、地盤２１の強度が
適度に保たれていれば、プレリーミングを行わないでＰ
Ｅ管３８を地盤２１中に引込むこともできる。地盤２１
の強度が不足するときには、プレリーミングで形成する
坑道が崩れるので、拡径治具４０を押し戻して崩れた
泥、土砂あるいは礫などを排除し、改めて拡径を行いな
がらＰＥ管３８の引込みを行う。地盤２１の強度が大き
いときには拡径治具４０の軸４４を充分に回転させ、小
径リーマ部４１、大径リーマ部４２およびオーバカッタ
４９で、地盤２１を充分に削り取り、坑道３０を形成す
る必要がある。プレリーミングでは、坑道３０を形成し
た際に削り落とした土砂が堆積するので、拡径治具４０
を押し戻して堆積した土砂を排除し、再び拡径治具４０
を引戻す際に、合成樹脂製管を坑道３０内に敷設するこ
とができる。In the diameter increasing jig 40 of the present embodiment, the consolidating portion 4
The overcutter 49 is protruded from 3 to excavate the tunnel 30 with a diameter larger than the outer diameter of the consolidation part 43. When the diameter expanding jig 40 of the present embodiment is used, if the strength of the ground 21 is maintained at an appropriate level, P
The E pipe 38 can be drawn into the ground 21. Ground 21
When the strength of the steel is insufficient, the tunnel formed by pre-reaming collapses, so that the expanding jig 40 is pushed back to remove the collapsed mud, earth and sand, or gravels, and the PE pipe 38 is pulled in while performing the expanding again. . When the strength of the ground 21 is high, it is necessary to sufficiently rotate the shaft 44 of the diameter-expanding jig 40, sufficiently shaving the ground 21 with the small-diameter reamer 41, the large-diameter reamer 42, and the over cutter 49 to form the tunnel 30. is there. In the pre-reaming, the earth and sand that has been shaved off when the tunnel 30 is formed accumulates.
Is pushed back to remove the accumulated sediment, and the diameter expanding jig 40 is again
When pulling back, a synthetic resin pipe can be laid in the tunnel 30.
【００１９】図２に示すように、本実施形態の拡径治具
４０は前半の小径リーマ部４１を軸４４から取外すこと
ができる。図３は、小径リーマ部４１を軸線方向の前方
から見た状態を示す。図４は、小径リーマ部４１を取外
した拡径治具４０を軸線方向前方から見た状態を示す。
地盤２１が強固な場合には、小径リーマ部４１を装着し
て推進ロッド２４から拡径治具４０を回転させて坑道３
０を形成する。本実施形態の拡径治具４０では、圧密部
４３が中空状に形成されているので、図１（２）〜
（３）に示すように、拡径治具４０を戻す際に地盤２１
から受ける抵抗をさらに軽減させることができる。As shown in FIG. 2, the diameter expanding jig 40 of the present embodiment can remove the small diameter reamer portion 41 in the first half from the shaft 44. FIG. 3 shows a state in which the small-diameter reamer portion 41 is viewed from the front in the axial direction. FIG. 4 shows a state in which the large-diameter jig 40 from which the small-diameter reamer portion 41 is removed is viewed from the front in the axial direction.
When the ground 21 is strong, the small-diameter reamer portion 41 is attached, and the large-diameter jig 40 is rotated from the propulsion rod 24 so that the tunnel 3
0 is formed. In the diameter increasing jig 40 of the present embodiment, since the consolidating portion 43 is formed in a hollow shape, FIG.
As shown in (3), when returning the diameter expanding jig 40,
The resistance received from the vehicle can be further reduced.
【００２０】[0020]
【発明の効果】以上のように本発明によれば、一旦推進
ロッドを発進立坑から到達立坑まで推進させた後、拡径
治具を推進ロッドの先端に接続して引込むプレリーミン
グを行い、推進ロッドの先端に拡径治具を装着したまま
再び発進立坑から到達立坑まで推進ロッドを押し戻し、
合成樹脂製管を引込むことができる。拡径治具の付換え
や、余分なロッドの接続作業が不要となるので、プレリ
ーミング工程を伴う合成樹脂製管の敷設を効率よく行う
ことができる。As described above, according to the present invention, after the propulsion rod is once propelled from the starting shaft to the reaching shaft, pre-reaming is performed by connecting the expanding jig to the tip of the propulsion rod and pulling in. Pushing the propulsion rod back from the starting shaft to the reaching shaft again with the expanding jig attached to the tip of the rod,
A synthetic resin tube can be pulled in. Since there is no need to change the diameter-enlargement jig or connect an extra rod, it is possible to efficiently lay a synthetic resin pipe with a pre-reaming step.
【００２１】さらに本発明によれば、推進ロッドの先端
に装着する治具が、引込む際に坑道の径を拡げる拡径部
を有し、押し戻す際に地盤からの抵抗力を軽減する形状
を有しているので、プレリーミングを行っても拡径治具
を付換えることなく、そのまま形成される坑道内に押し
戻し、効率よくプレリーミングを伴う合成樹脂製管の敷
設を行うことができる。Further, according to the present invention, the jig attached to the tip of the propulsion rod has a diameter-enlarging portion for expanding the diameter of the tunnel when retracted, and has a shape for reducing resistance from the ground when pushing back. Therefore, even if the pre-reaming is performed, the pipe can be pushed back into the formed tunnel without changing the diameter expanding jig, and the synthetic resin pipe with the pre-reaming can be efficiently laid.
【図１】本発明の実施の一形態の工法を概略的に示す簡
略化した断面図である。FIG. 1 is a simplified cross-sectional view schematically showing a method of an embodiment of the present invention.
【図２】本発明の実施の他の形態に用いる拡径治具４０
を、部分的に断面視して示す側面図である。FIG. 2 is an enlarged diameter jig 40 used in another embodiment of the present invention.
Is a side view showing a partial cross section.
【図３】図２の拡径治具４０の小径リーマ部４１の正面
図である。FIG. 3 is a front view of a small diameter reamer 41 of the diameter increasing jig 40 of FIG. 2;
【図４】図２の拡径治具４０で小径リーマ部４１を除い
た部分の正面図である。FIG. 4 is a front view of a portion of the diameter increasing jig 40 of FIG. 2 excluding a small diameter reamer portion 41;
【図５】従来からの推進工法による合成樹脂製管の敷設
方法の基本的な工程を示す簡略化した断面図である。FIG. 5 is a simplified sectional view showing basic steps of a conventional method of laying a synthetic resin pipe by a propulsion method.
【図６】従来からのプレリーミングを伴う合成樹脂製管
の敷設方法を示す簡略化した断面図である。FIG. 6 is a simplified cross-sectional view showing a conventional method of laying a synthetic resin pipe with pre-reaming.
２１ 地盤 ２２ 発進立坑 ２３ 到達立坑 ２４ 推進ロッド ２５ 治具 ２７ リーマ ３０ 坑道 ３８ ＰＥ管 ４０ 拡径治具 ４１ 小径リーマ部 ４２ 大径リーマ部 ４３ 圧密部 DESCRIPTION OF SYMBOLS 21 Ground 22 Start shaft 23 Reach shaft 24 Propulsion rod 25 Jig 27 Reamer 30 Tunnel 38 PE pipe 40 Diameter expansion jig 41 Small diameter reamer part 42 Large diameter reamer part 43 Consolidation part
Claims (2)
脂製管を敷設する際に、 発進立坑から到達立坑に推進ロッドを推進させ、 推進ロッドの先端が到達立坑に到達したら、推進ロッド
の先端に前後方向で使用可能な拡径治具を装着して、 拡径治具が発進立坑に到達するまで推進ロッドを引込
み、 発進立坑に拡径治具が到達した後で、拡径治具を先端に
装着した状態の推進ロッドを、再度到達立坑に向けて押
し戻し、 推進ロッドの先端が到達立坑に到達したら、合成樹脂製
管を拡径治具に連結して、拡径治具とともに到達立坑か
ら発進立坑まで推進ロッドによって引込むことを特徴と
する合成樹脂製管の敷設方法。When laying a synthetic resin pipe underground using the propulsion method without excavation, the propulsion rod is propelled from the starting shaft to the reaching shaft, and when the tip of the propulsion rod reaches the reaching shaft, the propulsion is performed. Attach a diameter expansion jig that can be used in the front-rear direction to the tip of the rod, retract the propulsion rod until the diameter expansion jig reaches the starting shaft, and expand the diameter after the expanding jig reaches the starting shaft. The propulsion rod with the jig attached to the tip is pushed back toward the arrival shaft, and when the tip of the propulsion rod reaches the arrival shaft, the synthetic resin pipe is connected to the diameter expansion jig, and the diameter expansion jig is connected. A method of laying a synthetic resin pipe, wherein the pipe is retracted from a reaching shaft to a starting shaft by a propulsion rod.
て、合成樹脂製管を地中に引込むために用いる治具であ
って、 推進ロッドの先端に装着されて、推進ロッドによって地
中に引込まれる際の移動方向の前方となる側が、推進ロ
ッドの推進時に地盤に形成される坑道の径を拡大させる
拡径部として形成され、 該移動方向の後方となる側が、推進ロッドを押し戻す際
に受ける地盤からの抵抗力を軽減する形状を有し、かつ
合成樹脂製管が連結可能であることを特徴とする合成樹
脂製管の敷設治具。2. A jig which is attached to the tip of a propulsion rod by a propulsion method and is used to draw a synthetic resin tube into the ground. The side that is forward in the moving direction when retracted is formed as a diameter-enlarged portion that enlarges the diameter of a gallery formed on the ground when the propulsion rod is propelled, and the side that is rearward in the direction of movement pushes back the propulsion rod. A jig for laying a synthetic resin pipe, wherein the jig has a shape for reducing a resistance force from the ground received by the pipe, and is connectable to a synthetic resin pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10190744A JP2000017988A (en) | 1998-07-06 | 1998-07-06 | Method and jig for laying pipe made of synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10190744A JP2000017988A (en) | 1998-07-06 | 1998-07-06 | Method and jig for laying pipe made of synthetic resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000017988A true JP2000017988A (en) | 2000-01-18 |
Family
ID=16263038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10190744A Pending JP2000017988A (en) | 1998-07-06 | 1998-07-06 | Method and jig for laying pipe made of synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000017988A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100514303B1 (en) * | 2003-03-20 | 2005-09-13 | (주)동양엠티 | Method for Digging a Tunnel |
| KR20060101734A (en) * | 2005-03-21 | 2006-09-26 | 윤정식 | Method for constructing non-excavation directivity pipe |
-
1998
- 1998-07-06 JP JP10190744A patent/JP2000017988A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100514303B1 (en) * | 2003-03-20 | 2005-09-13 | (주)동양엠티 | Method for Digging a Tunnel |
| KR20060101734A (en) * | 2005-03-21 | 2006-09-26 | 윤정식 | Method for constructing non-excavation directivity pipe |
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