JP2016196911A - Sheath pipe jacking method - Google Patents

Sheath pipe jacking method Download PDF

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JP2016196911A
JP2016196911A JP2015076620A JP2015076620A JP2016196911A JP 2016196911 A JP2016196911 A JP 2016196911A JP 2015076620 A JP2015076620 A JP 2015076620A JP 2015076620 A JP2015076620 A JP 2015076620A JP 2016196911 A JP2016196911 A JP 2016196911A
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pipe
sheath
new
sheath pipe
joined
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JP6335828B2 (en
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弘司 藤田
Koji Fujita
弘司 藤田
耕司 大川
Koji Okawa
耕司 大川
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Kurimoto Ltd
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Kurimoto Ltd
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Abstract

PROBLEM TO BE SOLVED: To prevent a preceding new pipe and a subsequent new pipe from separating each other, in a sheath pipe jacking method using a caster device.SOLUTION: A sheath pipe thrust method disposes a pipe conduit by feeding a pipe P, which is a joint structure in which a spigot 1 is inserted to a socket 2 to be joined, into a sheath pipe P' while subsequently joining the above pipe P to a precede pipe P. In the sheath pipe thrust method, support means 10 provided outside the sheath pipe P' and the pipe P fed into the sheath pipe P' are coupled by a coupling member 11, the support means 10 holds the pipe P through the coupling member 11, and thereby the joined pipes P are maintained in a joined state. The insertion length of the coupling member 11 into the sheath pipe P' is adjusted by the support means 10, according to movement of the pipe P, to which the coupling member 11 is connected, in the sheath pipe P'.SELECTED DRAWING: Figure 1

Description

この発明は、水道、ガス、下水道等に用いる流体輸送用配管を、既設のさや管内に配設するさや管推進工法に関するものである。   The present invention relates to a sheath tube propulsion method in which a pipe for transporting fluid used for water supply, gas, sewerage, etc. is disposed in an existing sheath.

ダクタイル鋳鉄管等の各種流体輸送用配管を地中に埋設する工法として、地面を開削して管体を配設する開削工法が一般的である。しかし、開削のために交通を遮断することが困難である場合には、開削した発進坑と到達坑とを結ぶさや管（鞘管）としてヒューム管や鋼管等を推進等により埋設した後、その内部に、ダクタイル鋳鉄管等の新管を挿入する工法が採用される場合がある。また、既に供用されている既設管をさや管として、その内部に口径の小さい新管を挿入して管路を更新する工法が採用される場合もある。既設のさや管内に、相対的に小径の新管を埋設するこれらの工法は、さや管推進工法と称される。   As a method for embedding various fluid transport pipes such as ductile cast iron pipes in the ground, an open-cut method for excavating the ground and disposing a pipe body is generally used. However, if it is difficult to cut off traffic due to excavation, a fume pipe or steel pipe or the like is buried by propulsion as a sheath pipe (sheath pipe) that connects the excavated start pit and the arrival mine. In some cases, a method of inserting a new pipe such as a ductile cast iron pipe may be employed. In some cases, an existing pipe already in service is used as a sheath pipe, and a new pipe having a small diameter is inserted therein to renew the pipe. These methods of embedding a relatively small-diameter new pipe in an existing sheath are called sheath tube propulsion methods.

さや管推進工法は、発進坑と到達坑との間に埋設されているさや管内に、そのさや管よりも相対的に小径の新管を、発進坑側から順次挿入して敷設するものである。発進坑内には油圧ジャッキが設置され、油圧ジャッキは、発進坑の内壁に反力をとって、前部のロッドで新管を到達坑側へ向かって押圧する。新管は、その先端部の挿し口を、先行の新管の後端部の受口に挿入することによって順次接合され、さや管内に押し込まれて行く。   In the sheath pipe propulsion method, a new pipe having a smaller diameter than the sheath pipe is sequentially inserted from the launch tunnel side into the sheath pipe buried between the start shaft and the arrival shaft. . A hydraulic jack is installed in the starting pit, and the hydraulic jack takes a reaction force on the inner wall of the starting pit and presses the new pipe toward the destination mine side with the front rod. The new tube is sequentially joined by inserting the insertion port at the tip of the new tube into the receiving port at the rear end of the preceding new tube, and is pushed into the sheath.

新管の外周には、キャスタ装置が取り付けられる。このキャスタ装置には車輪が設けられており、車輪の転動により、新管がさや管内を走行できるようになっている。このため、油圧ジャッキによる押圧で、新管はスムーズに推進される。   A caster device is attached to the outer periphery of the new pipe. The caster device is provided with wheels, and a new pipe can run in the sheath by rolling of the wheels. For this reason, a new pipe is smoothly propelled by press by a hydraulic jack.

特開２００３−７４７４５号公報JP 2003-74745 A

さや管推進工法においては、発進坑から到達坑に向けて上り勾配又は平坦（水平）であることが多いが、立地条件によっては、発進坑から到達坑に向かって下り勾配の区間が介在する場合もある。   In the sheath propulsion method, the slope is often ascending or flat (horizontal) from the starting pit to the reaching pit, but depending on the location conditions, there is a downward slope section from the starting pit toward the reaching pit. There is also.

発進坑から到達坑に向けて下り勾配になっていると、先行の新管が後続の新管から滑落して、あるいは、新管が後続の新管とともに、さや管内を滑走してしまう事態が想定される。また、滑落に至らないまでも、先行の新管と後続の新管との継手部における管軸方向への重なり代（受口への挿し口の入り込み深さ）が少なくなってしまう事態も想定される。   If the slope is descending from the starting pit to the arrival pit, the preceding new pipe may slide down from the succeeding new pipe, or the new pipe may slide along the sheath with the following new pipe. is assumed. In addition, even if it does not slide down, it is assumed that there is less overlap allowance in the pipe axis direction (depth of insertion into the receiving port) at the joint of the preceding new tube and the succeeding new tube. Is done.

この点、上記特許文献１では、このような事態を防止するために、キャスタ装置の車輪の一部をソリに代えることにより、下り勾配における推進抵抗を増加させて滑落等を防いでいるが、このようなソリの介在は、逆に上り勾配箇所での油圧ジャッキによる推進を過度に重くしてしまうという問題がある。   In this regard, in Patent Document 1 described above, in order to prevent such a situation, by replacing some of the wheels of the caster device with a sled, the propulsion resistance on the downward slope is increased to prevent sliding, etc. On the other hand, the presence of such a warp has a problem that the propulsion by the hydraulic jack at the uphill portion becomes excessively heavy.

そこで、この発明は、さや管推進工法において、さや管内に送り出す管の推進抵抗を過度に増大させることなく、先行の管と後続の管とが滑落したり、継手部における管同士の重なり代が少なくなることを防止することを課題とする。   Therefore, in the sheath tube propulsion method, the present invention does not excessively increase the propulsion resistance of the tube sent into the sheath tube, the preceding tube and the succeeding tube slide down, or the overlapping margin between the tubes in the joint portion is increased. It is an object to prevent the decrease.

上記の課題を解決するために、この発明は、受口に挿し口を挿入して継ぎ合わせる継手構造である管を、先行する管に順次継ぎ合わせつつさや管内に送り込んで管路を配設するさや管推進工法において、前記さや管外に設けた支持手段と、前記さや管内に送り込まれた前記管とを連結材で結び、前記支持手段は前記連結材を介して前記管を保持することにより、継ぎ合わされた前記管同士の継ぎ合わせ状態を維持するさや管推進工法を採用した。   In order to solve the above-described problems, the present invention arranges a pipe which is a joint structure in which an insertion port is inserted into a receiving port and joined together, and the pipe is arranged while sequentially joining the preceding tube. In the sheath tube propulsion method, the supporting means provided outside the sheath pipe and the pipe fed into the sheath pipe are connected by a connecting material, and the supporting means holds the tube via the connecting material. The sheath propulsion method was adopted to maintain the joined state of the joined pipes.

前記連結材の前記さや管内への入り込み長さは、前記連結材が接続された前記管が前記さや管内を移動するのに合わせて前記支持手段が調整する構成とすることができる。   The length of penetration of the connecting material into the sheath tube can be adjusted by the support means as the tube connected to the connecting material moves through the sheath tube.

また、上記の課題を解決するために、この発明は、受口に挿し口を挿入して継ぎ合わせる継手構造である管を、先行する管に順次継ぎ合わせつつさや管内に送り込んで管路を配設するさや管推進工法に用いられる管体継手部の滑落防止装置として、前記さや管外に設けた支持手段と、前記さや管内に送り込まれた前記管とを結ぶ連結材とを備え、前記支持手段は前記連結材を介して前記管を保持することにより、継ぎ合わされた前記管同士の継ぎ合わせ状態を維持する構成を採用した。   Further, in order to solve the above-mentioned problems, the present invention arranges a pipe line by feeding a pipe, which is a joint structure to be inserted and inserted into a receptacle, into a sheath pipe while sequentially joining the preceding pipe. As a slip-preventing device for a pipe joint used in a sheath pipe propulsion method, a support means provided outside the sheath pipe and a connecting material that connects the pipe fed into the sheath pipe, the support The means employ | adopted the structure which maintains the joining state of the said pipes joined by hold | maintaining the said pipe | tube via the said connection material.

この発明は、さや管外に設けた支持手段と、さや管内に送り込まれた管とを連結材で結び、支持手段は連結材を介して管を保持することにより、さや管内における管同士の継ぎ合わせ状態を維持するようにしたので、管の推進抵抗を過度に増大させることなく、先行及び後続の管が滑落したり、あるいは、継手部における管体同士の重なり代が少なくなることを防止できる。   In this invention, the supporting means provided outside the sheath and the pipe fed into the sheath are connected by a connecting material, and the supporting means holds the tube via the connecting material, thereby connecting the pipes in the sheath. Since the alignment state is maintained, it is possible to prevent the leading and succeeding pipes from slipping down or reducing the overlap margin between the pipe bodies at the joint without excessively increasing the pushing resistance of the pipes. .

この発明の一実施形態を示す縦断面図A longitudinal sectional view showing an embodiment of the present invention 同実施形態の要部拡大斜視図Main part enlarged perspective view of the same embodiment 同実施形態の要部拡大断面図The principal part expanded sectional view of the embodiment

この発明の実施形態を図面に基づいて説明する。この実施形態は、鋼管、コンクリート管などの地中に埋設されたさや管Ｐ’内に、推進工法によってダクタイル鋳鉄管等の管Ｐを施設するものである。受口２に挿し口１を挿入して継ぎ合わせる継手構造である管Ｐを、先行する管Ｐに順次継ぎ合わせつつさや管Ｐ’内に送り込んで管路を配設していく。以下、さや管Ｐ’内に配設する管Ｐを、新管Ｐと称する。   An embodiment of the present invention will be described with reference to the drawings. In this embodiment, a pipe P such as a ductile cast iron pipe is installed in a sheath pipe P ′ buried in the ground such as a steel pipe or a concrete pipe by a propulsion method. The pipe P, which is a joint structure in which the insertion port 1 is inserted into the receiving port 2 and joined together, is fed into the sheath tube P ′ while sequentially joining the preceding pipe P, and the pipeline is arranged. Hereinafter, the pipe P disposed in the sheath pipe P ′ is referred to as a new pipe P.

新管Ｐは、図１に示すように、順次、クレーン等によって吊り下げられながら、発進坑Ｓ内に下ろされる。まず、最初の新管Ｐが、その前端にある挿し口１を到達坑（到達坑は図１には図示せず）側へ向けた状態で、さや管Ｐ’内に挿入される。次なる新管Ｐは、その挿し口１が、先行する新管Ｐの後端にある受口２に挿入されて継合わせられる。そして、さらに次なる新管Ｐがさや管Ｐ’内に送り込まれ、その挿し口１が最後尾の新管Ｐの受口２に挿入されて継ぎ合わされる。   As shown in FIG. 1, the new pipe P is lowered into the start shaft S while being suspended by a crane or the like. First, the first new pipe P is inserted into the sheath pipe P 'with the insertion port 1 at the front end thereof directed toward the arrival mine (the arrival mine is not shown in FIG. 1). The next new tube P is inserted and spliced into the receiving port 2 at the rear end of the preceding new tube P. Further, the next new pipe P is fed into the sheath pipe P ', and the insertion port 1 is inserted into the receiving port 2 of the rearmost new pipe P and joined.

発進坑Ｓ内には油圧ジャッキＪが設置され、油圧ジャッキＪは、発進坑Ｓの内壁Ｈに反力をとって、前部のロッドで新管Ｐを到達坑側へ向かって押圧する。この押圧により、継手部によって接続された複数本の新管Ｐ群が、さや管Ｐ’内へ押し込まれて行く。   A hydraulic jack J is installed in the start pit S, and the hydraulic jack J takes a reaction force against the inner wall H of the start pit S and presses the new pipe P toward the destination mine side with the front rod. By this pressing, the plurality of new pipes P group connected by the joint portion are pushed into the sheath pipe P ′.

新管Ｐの外周には、キャスタ装置３が取り付けられる。このキャスタ装置３には、新管Ｐの外周を囲むフレームに回転自在の車輪が設けられており、車輪の転動により、新管Ｐがさや管Ｐ’内を走行できるようになっている。このため、油圧ジャッキＪによる押圧で、新管Ｐはスムーズに推進される。   A caster device 3 is attached to the outer periphery of the new pipe P. In the caster device 3, a rotatable wheel is provided on a frame surrounding the outer periphery of the new pipe P, and the new pipe P can travel in the sheath pipe P 'by rolling the wheel. For this reason, the new pipe P is smoothly pushed by the pressure by the hydraulic jack J.

キャスタ装置３として、例えば、複数の円弧状の部材で構成されたフレームを備え、その円弧状のフレームの円弧方向端部に設けたフランジ部同士が、ボルト・ナット等によって締め付けられることで全体として円形を成して、新管Ｐの外周に動かないように固定されているものが挙げられる。車輪の車軸は、対向するフランジ部同士を結んで固定することができる。   As the caster device 3, for example, a frame composed of a plurality of arc-shaped members is provided, and the flange portions provided at the arc-direction ends of the arc-shaped frame are tightened by bolts / nuts or the like as a whole. The thing fixed so that it may form circular and may not move to the outer periphery of the new pipe P is mentioned. The wheel axle can be fixed by connecting opposite flange portions.

なお、新管Ｐ同士の継手部の形態は、管路の用途や仕様に応じて適宜選択される。例えば、挿し口１の先端に突起、受口２の内面にロックリングがそれぞれ設けられて、ゴム輪等を介在した状態で挿し口１を受口２に挿し込んだ後、押し輪によってゴム輪を挿し口１と受口２との間の間隙に押し込んでシールした構造を採用することができる。   In addition, the form of the joint part between new pipes P is suitably selected according to the use and specification of a pipe line. For example, a protrusion is provided at the tip of the insertion port 1 and a lock ring is provided on the inner surface of the receiving port 2. After inserting the insertion port 1 into the receiving port 2 with a rubber ring or the like interposed therebetween, a rubber ring is formed by a push ring. It is possible to employ a structure in which the seal is pushed into the gap between the insertion port 1 and the receiving port 2.

この種のさや管推進工法において、この発明では、新管Ｐの推進時におけるさや管Ｐ’内での新管Ｐ同士の継ぎ合わせ状態を維持するために、管体継手部の滑落防止装置を用いた推進工法を採用している。   In this type of sheath tube propulsion method, in the present invention, in order to maintain the seamed state of the new tubes P in the sheath tube P ′ during the propulsion of the new tube P, a slip prevention device for the pipe joint portion is provided. The propulsion method used is used.

滑落防止装置の構成は、図１に示すように、さや管Ｐ’外に設けた支持手段１０と、さや管Ｐ’内に送り込まれた新管Ｐとを結ぶ連結材１１、その連結材１１を新管Ｐに接続する係止手段２０等とを備える。   As shown in FIG. 1, the structure of the slip-off preventing device includes a connecting member 11 that connects the support means 10 provided outside the sheath tube P ′ and the new tube P fed into the sheath tube P ′, and the connecting member 11. And a locking means 20 or the like for connecting to the new pipe P.

この実施形態では、連結材１１として金属製のワイヤを採用しているが、新管Ｐを保持し、且つ、新管Ｐの滑落や滑走を抑える強度を有するものであれば、他のものであってもよい。例えば、繊維製の紐やロープであってもよいし、金属や繊維、その他素材からなる長手状の部材であってもよい。ただし、さや管Ｐ’内におけるカーブへの対応や、発進坑Ｓ内での取り回し等に対応して、連結材１１は屈曲可能な柔軟な素材であることが望ましい。   In this embodiment, a metal wire is used as the connecting member 11, but any other material can be used as long as it holds the new pipe P and has strength to prevent the new pipe P from sliding or sliding. There may be. For example, it may be a fiber string or rope, or may be a longitudinal member made of metal, fiber, or other material. However, it is desirable that the connecting material 11 be a flexible material that can be bent in order to cope with a curve in the sheath pipe P 'or to handle in the start pit S.

支持手段１０は、発進坑Ｓ内外に設けた複数の滑車１２，１３と、地上の地盤Ｇ上に配置した巻回装置１４、及び、その巻回装置１４を駆動力にそって回転させる駆動源等からなるウインチを備える。駆動源は、モータやエンジン等によって構成され、その出力を制御して巻回装置１４を必要な方向に必要なだけ回転させて、連結材１１を巻き取ったり、あるいは、巻き取られている連結材１１を送り出したりすることができる。   The supporting means 10 includes a plurality of pulleys 12 and 13 provided inside and outside the start pit S, a winding device 14 disposed on the ground G on the ground, and a driving source for rotating the winding device 14 according to a driving force. Equipped with a winch made of etc. The drive source is composed of a motor, an engine, and the like, and controls the output thereof to rotate the winding device 14 in the necessary direction as much as necessary to wind up the connecting material 11 or the winding connection. The material 11 can be sent out.

新管Ｐに接続された連結材１１は、発進坑Ｓ内外に設けた複数の滑車１２，１３を通じて方向を転換し、地上の巻回装置１４のロータに巻回されている。   The connecting material 11 connected to the new pipe P changes its direction through a plurality of pulleys 12 and 13 provided inside and outside the start pit S, and is wound around the rotor of the ground winding device 14.

この実施形態では、先頭の新管Ｐに連結材１１が接続されるので、その連結材１１の長さは、先頭の新管Ｐが到達坑に至るまでの新管Ｐを保持できる長さ、すなわち、巻回装置１４から発進坑Ｓを通って到達坑に至るまでの長さ以上となっている。新管Ｐが到達坑に至れば、新管Ｐから連結材１１を切り離してもよい。   In this embodiment, since the connecting material 11 is connected to the leading new pipe P, the length of the connecting material 11 is a length that can hold the new pipe P until the leading new pipe P reaches the arrival shaft, That is, it is more than the length from the winding device 14 through the starting pit S to the reaching mine. If the new pipe P reaches the reaching pit, the connecting material 11 may be separated from the new pipe P.

連結材１１の新管Ｐへの接続部の詳細を、図２及び図３に示す。   The detail of the connection part to the new pipe P of the connection material 11 is shown in FIG.2 and FIG.3.

連結材１１の端部１１ａは、係止手段２０によって、先頭の新管Ｐの挿し口１の端縁部に接続されている。係止手段２０は、挿し口１の端縁部に固定される固定部材２２と、その固定部材２２に揺動自在に接続される連結部材２１とからなる。連結材１１のリング状の端部１１ａは、連結部材２１の孔部に接続されている。   The end 11 a of the connecting member 11 is connected to the end edge of the insertion opening 1 of the leading new tube P by the locking means 20. The locking means 20 includes a fixing member 22 that is fixed to the edge of the insertion slot 1 and a connecting member 21 that is swingably connected to the fixing member 22. The ring-shaped end portion 11 a of the connecting member 11 is connected to the hole portion of the connecting member 21.

固定部材２２は、挿し口１の内外面を挟む断面コ字状を成す端部挟持材２２ｂと、その端部挟持材２２ｂの外側に溶接等により固定され、同じく断面コ字状を成す保持材２２ａとを備える。端部挟持材２２ｂは、ボルトからなる締付部材２２ｃによって、挿し口１の端縁部に締め付け固定される。締付部材２２ｃのボルトをねじ込めば、端部挟持材２２ｂは挿し口１の内面に押圧されて、新管Ｐに固定される。   The fixing member 22 has an end sandwiching member 22b having a U-shaped cross section sandwiching the inner and outer surfaces of the insertion slot 1, and a holding member that is fixed to the outside of the end sandwiching member 22b by welding or the like and also has an U-shaped section. 22a. The end clamping member 22b is fastened and fixed to the end edge portion of the insertion slot 1 by a fastening member 22c made of a bolt. If the bolt of the fastening member 22c is screwed in, the end clamping member 22b is pressed against the inner surface of the insertion slot 1 and fixed to the new pipe P.

連結部材２１は、保持材２２ａに対して揺動軸２１ｃを介して接続されている先端側の二股状の基部２１ｂと、その基部２１ｂから後方（受口２側）へ伸びるフラットな連結片２１ａとを備える。基部２１ｂ及び連結片２１ａは、保持材２２ａに対して揺動軸２１ｃの軸周りに揺動自在である。このため、連結部材２１に接続されるワイヤ（連結材１１）は、図３に示すように、固定部材２２に対して首振り可能である。   The connecting member 21 includes a bifurcated base portion 21b on the distal end side that is connected to the holding member 22a via a swing shaft 21c, and a flat connecting piece 21a that extends rearward from the base portion 21b (receiving port 2 side). With. The base 21b and the connecting piece 21a are swingable about the swing shaft 21c with respect to the holding member 22a. For this reason, the wire (connecting material 11) connected to the connecting member 21 can swing with respect to the fixing member 22, as shown in FIG.

また、揺動軸２１ｃは、二股状の基部２１ｂの孔と保持材２２ａに設けた孔に挿通されている。二股状の基部２１ｂの孔は、一方の孔がネジ無し、他方の孔が雌ネジ付きである。先端に雄ネジが形成された揺動軸２１ｃを、基部２１ｂの一方の孔、保持材２２ａの孔、基部２１ｂの他方の孔の順に挿通し、揺動軸２１ｃの先端の雄ネジを、他方の孔の雌ネジにねじ込むことにより、連結部材２１は固定部材２２に着脱可能に接続される。   The swing shaft 21c is inserted through a hole in the forked base 21b and a hole provided in the holding member 22a. As for the holes of the bifurcated base portion 21b, one hole is unthreaded and the other hole is internally threaded. The swing shaft 21c having a male screw formed at the tip is inserted through one hole of the base 21b, the hole of the holding member 22a, and the other hole of the base 21b in this order, and the male screw at the tip of the swing shaft 21c is inserted into the other The connecting member 21 is detachably connected to the fixing member 22 by being screwed into the female screw of the hole.

さや管推進工法において、複数本継ぎ合わされた新管Ｐ群が、油圧ジャッキＪにより推進されてさや管Ｐ’内を前進し、先頭の新管Ｐが、さや管Ｐ’の下り勾配区間に至ったとする。あるいは、図１に示すように、さや管Ｐ’が、発進坑Ｓに下り勾配で取り付けられている場合を想定する。   In the sheath tube propulsion method, a group of new tubes P joined together is propelled by the hydraulic jack J and advances in the sheath tube P ', and the leading new tube P reaches the downward slope section of the sheath tube P'. Suppose. Alternatively, as shown in FIG. 1, a case is assumed in which the sheath pipe P ′ is attached to the starting pit S with a downward slope.

このとき、新管Ｐはさや管Ｐ’の勾配に合わせて下り勾配となっている。すなわち、新管Ｐの管軸方向は、発進坑Ｓから到達坑に向いて水平方向に対して俯角を成す状態となっている。   At this time, the new pipe P has a downward slope in accordance with the slope of the sheath pipe P '. That is, the pipe axis direction of the new pipe P is in a state of making a depression with respect to the horizontal direction from the start pit S to the arrival pit.

支持手段１０は、連結材１１を介して、先頭の新管Ｐ及びそれに続く後方の新管Ｐ群を保持することにより、継ぎ合わされた新管Ｐ同士の継ぎ合わせ状態を維持することができる。すなわち、全ての新管Ｐは、隣り合う新管Ｐの継手部が滑落することなく、正常な継手部の状態に維持されながら推進が続行する。   The support means 10 can maintain the joined state of the joined new pipes P by holding the leading new pipe P and the succeeding rear new pipe P group via the connecting member 11. That is, the propulsion of all the new pipes P is continued while maintaining the state of the normal joint part without the joint part of the adjacent new pipe P sliding down.

この連結材１１を通じて行う新管Ｐの保持は、新管Ｐが進行するのに応じて、連結材１１のさや管Ｐ’内への入り込み長さを調整することにより維持される。すなわち、連結材１１のさや管Ｐ’内への入り込み長さは、連結材１１が接続された新管Ｐがさや管Ｐ’内を移動するのに合わせて、ウインチの出力を制御して、巻取装置１４のロータを必要なだけ回転させることにより調整される。このとき、連結材１１の張力は、その連結材１１が弛むことなく、且つ、油圧ジャッキＪを用いる場合は、その油圧ジャッキＪによる新管Ｐの押圧抵抗を、過度に増やさない程度に設定することが望ましい。   The holding of the new pipe P through the connecting material 11 is maintained by adjusting the length of the connecting material 11 entering the sheath P 'as the new pipe P advances. That is, the length of penetration of the connecting material 11 into the sheath pipe P ′ is controlled by controlling the output of the winch as the new pipe P to which the connecting material 11 is connected moves within the sheath pipe P ′. Adjustment is made by rotating the rotor of the winding device 14 as necessary. At this time, the tension of the connecting member 11 is set so that the connecting member 11 does not loosen and when the hydraulic jack J is used, the pressing resistance of the new pipe P by the hydraulic jack J is not excessively increased. It is desirable.

これにより、下り勾配のさや管Ｐ’内での推進においても、先行の新管Ｐが後続の新管Ｐから離脱して、さや管Ｐ’内を滑走してしまう事態が防止される。また、先行の新管Ｐと後続の新管Ｐとの継手部における受口２への挿し口１の入り込み深さが少なくなってしまう事態も防止される。   Thus, even in the case of propulsion in the down-sheathed sheath pipe P ′, it is possible to prevent a situation in which the preceding new pipe P is detached from the succeeding new pipe P and slides in the sheath pipe P ′. Moreover, the situation where the penetration depth of the insertion port 1 to the receiving port 2 in the joint part of the preceding new pipe P and the succeeding new pipe P decreases is also prevented.

なお、下り勾配であれば、油圧ジャッキＪによる新管Ｐの押圧を行うことなく、新管Ｐが、その自重でさや管Ｐ’内を下っていくことにより、新管Ｐの送り込みを行うことができる。このとき、新管Ｐは、連結材１１を介してさや管Ｐ’外の支持手段１０に保持されているので、連結材１１を順次送り出しながら新管Ｐを必要なだけ進行させ、発進坑Ｓ側では、新たな新管Ｐを継ぎ合わせていくことができる。   In addition, if it is a downward slope, the new pipe P will be sent in by lowering the sheath P by its own weight without pressing the new pipe P by the hydraulic jack J. Can do. At this time, since the new pipe P is held by the support means 10 outside the sheath pipe P ′ via the connecting material 11, the new pipe P is advanced as much as necessary while sequentially sending the connecting material 11, and the starting pit S On the side, new pipes P can be spliced together.

この発明を適用できるさや管Ｐ’の形態は、上記の実施形態には限定されず、例えば、発進坑Ｓから到達坑に向かう途中までが下り勾配区間、その後、水平区間、上り勾配区間となって到達坑に至る構成、あるいは、発進坑Ｓから途中までが下り勾配区間、その後は、到達坑に至るまで水平区間である構成などにおいても、この発明を適用できる。   The form of the sheath pipe P ′ to which the present invention can be applied is not limited to the above-described embodiment. For example, the downhill section, the horizontal section, and the uphill section are formed from the starting pit S to the way to the arrival pit. The present invention can also be applied to a configuration that reaches the reaching pit, or a configuration in which a part from the starting pit S to the middle is a downward gradient section, and thereafter is a horizontal section to the reaching pit.

このとき、特に、下り勾配区間の長さに対して、上り勾配区間や水平区間の長さが長い場合等、新管Ｐの進行とともに継手部の滑落や新管Ｐの滑走の危惧が徐々に少なくなっていく場合は、さや管Ｐ’の下り勾配区間のみで、この滑落防止装置を用いる構成とすることができる。また、さや管Ｐ’の発進坑Ｓ寄りに下り勾配区間があれば、少なくとも先頭の新管Ｐが下り勾配区間にある間は油圧ジャッキＪによる押圧は行わず、先頭の新管Ｐが上り勾配区間や水平区間に入った後にのみ、油圧ジャッキＪによる押圧を行う構成とすることができる。   At this time, in particular, when the length of the ascending slope section or the horizontal section is longer than the length of the descending slope section, there is a gradual concern that the joint part may slide down or the new pipe P may slide as the new pipe P progresses. When it decreases, it can be set as the structure which uses this slipping prevention apparatus only in the downward slope area of the sheath P '. Further, if there is a downward slope section near the starting pit S of the sheath pipe P ′, the hydraulic jack J is not pressed at least while the leading new pipe P is in the downward slope section, and the leading new pipe P is inclined upward. It can be set as the structure which presses with the hydraulic jack J only after entering a section or a horizontal section.

下り勾配区間のみで滑落防止装置を用いる場合、連結材１１の長さは、巻回装置１４から発進坑Ｓを通って下り勾配区間の終了地点までの長さ以上とすれば足りる。新管Ｐが下り勾配区間の終了地点を通過した時点で、それ以後、到達坑まで下り勾配が無く、滑落や滑走等の危惧がない状況であれば、連結材１１を切り離すことができる。切り離しは、新管Ｐ側で行ってもよいし、巻回装置１４側で行ってもよく、あるいは、連結材１１を中間のいずれかの部分で切断してもよい。   When the slip prevention device is used only in the downward slope section, it is sufficient that the length of the connecting member 11 is equal to or longer than the length from the winding device 14 through the start shaft S to the end point of the downward slope section. When the new pipe P passes through the end point of the downward slope section, the connecting material 11 can be separated if there is no downward slope to the reaching mine and there is no fear of sliding or sliding. Separation may be performed on the new pipe P side, may be performed on the winding device 14 side, or the connecting material 11 may be cut at any intermediate portion.

上記の実施形態では、先頭の新管Ｐに連結材１１が接続されるようにしたが、滑落や滑走等が危惧される新管が先頭以外の新管Ｐである場合には、先頭以外の中間部の新管Ｐに連結材１１を接続してもよい。   In the above-described embodiment, the connecting material 11 is connected to the leading new pipe P. However, when the new pipe that is likely to slide down or slide is a new pipe P other than the leading pipe, an intermediate other than the leading pipe is used. The connecting material 11 may be connected to the new pipe P of the part.

１ 挿し口
２ 受口
３ キャスタ装置
１０ 支持手段
１１ 連結材（ワイヤ）
１１ａ 端部
２０ 係止手段
２１ 連結部材
２１ａ 連結片
２１ｂ 基部
２１ｃ 揺動軸
２２ 固定部材
２２ａ 保持材
２２ｂ 端部挟持材
２２ｃ 締付部材
Ｊ 油圧ジャッキ
Ｐ 新管
Ｐ’ さや管
Ｓ 発進坑 DESCRIPTION OF SYMBOLS 1 Insert port 2 Receiving port 3 Caster apparatus 10 Support means 11 Connection material (wire)
11a End portion 20 Locking means 21 Connection member 21a Connection piece 21b Base portion 21c Oscillating shaft 22 Fixing member 22a Holding member 22b End portion clamping member 22c Tightening member J Hydraulic jack P New pipe P 'Sheath pipe S Starting shaft

Claims (3)

受口（２）に挿し口（１）を挿入して継ぎ合わせる継手構造である管（Ｐ）を、先行する管（Ｐ）に順次継ぎ合わせつつさや管（Ｐ’）内に送り込んで管路を配設するさや管推進工法において、
前記さや管（Ｐ’）外に設けた支持手段（１０）と、前記さや管（Ｐ’）内に送り込まれた前記管（Ｐ）とを連結材（１１）で結び、前記支持手段（１０）は前記連結材（１１）を介して前記管（Ｐ）を保持することにより、継ぎ合わされた前記管（Ｐ）同士の継ぎ合わせ状態を維持するさや管推進工法。 Pipe (P), which is a joint structure in which the insertion opening (1) is inserted into the receiving opening (2) and joined together, is sequentially joined to the preceding pipe (P) and then fed into the sheath pipe (P ′). In the sheath pipe construction method,
The support means (10) provided outside the sheath pipe (P ′) and the pipe (P) fed into the sheath pipe (P ′) are connected by a connecting material (11), and the support means (10 ) Is a sheath tube propulsion method that maintains the joined state of the joined pipes (P) by holding the pipe (P) via the connecting material (11). 前記連結材（１１）の前記さや管（Ｐ’）内への入り込み長さは、前記連結材（１１）が接続された前記管（Ｐ）が前記さや管（Ｐ’）内を移動するのに合わせて前記支持手段（１０）が調整する請求項１に記載のさや管推進工法。   The length of penetration of the connecting material (11) into the sheath tube (P ′) is that the tube (P) to which the connecting material (11) is connected moves in the sheath tube (P ′). The sheath pipe propulsion method according to claim 1, wherein the support means (10) adjusts according to the conditions. 受口（２）に挿し口（１）を挿入して継ぎ合わせる継手構造である管（Ｐ）を、先行する管（Ｐ）に順次継ぎ合わせつつさや管（Ｐ’）内に送り込んで管路を配設するさや管推進工法に用いられ、
前記さや管（Ｐ’）外に設けた支持手段（１０）と、前記さや管（Ｐ’）内に送り込まれた前記管（Ｐ）とを結ぶ連結材（１１）とを備え、前記支持手段（１０）は前記連結材（１１）を介して前記管（Ｐ）を保持することにより、継ぎ合わされた前記管（Ｐ）同士の継ぎ合わせ状態を維持する管体継手部の滑落防止装置。 Pipe (P), which is a joint structure in which the insertion opening (1) is inserted into the receiving opening (2) and joined together, is sequentially joined to the preceding pipe (P) and then fed into the sheath pipe (P ′). Is used in the sheath pipe construction method,
A support means (10) provided outside the sheath pipe (P ') and a connecting member (11) for connecting the pipe (P) fed into the sheath pipe (P'); (10) is an apparatus for preventing slipping of the pipe joint portion that maintains the joined state of the joined pipes (P) by holding the pipe (P) via the connecting material (11).
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Publication number Priority date Publication date Assignee Title
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CN111520539B (en) * 2020-05-09 2021-08-27 无锡市锡山三建实业有限公司 Device for jacking construction of pipeline

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