JP5771122B2 - Pipe installation device - Google Patents

Pipe installation device Download PDF

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JP5771122B2
JP5771122B2 JP2011244274A JP2011244274A JP5771122B2 JP 5771122 B2 JP5771122 B2 JP 5771122B2 JP 2011244274 A JP2011244274 A JP 2011244274A JP 2011244274 A JP2011244274 A JP 2011244274A JP 5771122 B2 JP5771122 B2 JP 5771122B2
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pipe
center line
excavation
rotation center
guide member
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JP2013100660A (en
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茂治 岩永
茂治 岩永
河越　勝
勝 河越
秀明 小田原
秀明 小田原
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Kumagai Gumi Co Ltd
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Kumagai Gumi Co Ltd
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Description

本発明は、断面四角形状の管を地中に設置するための管設置装置に関する。   The present invention relates to a pipe installation device for installing a pipe having a square section in the ground.

従来、断面四角状の管を地中に設置するための管設置装置であって、管の先頭側の内側に管の推進方向と直交する回転中心線を回転中心として回転する回転掘削体を備えた管設置装置が知られている（例えば特許文献１等参照）。
また、断面円形状の曲管（管の中心線が曲線である管）を地中に設置するための管設置装置として、曲管の先頭側に曲管の推進方向に沿った回転中心線を回転中心として回転するカッタヘッドを備え、カッタヘッドの回転中心線を曲管の推進方向と交差する状態にしてカッタヘッドを揺動させることが可能な管設置装置が知られている（例えば特許文献２等参照）。 Conventionally, it is a pipe installation device for installing a pipe having a square cross section in the ground, and a rotary excavator that rotates around a rotation center line orthogonal to the propulsion direction of the pipe is provided inside the front side of the pipe. A pipe installation device is known (see, for example, Patent Document 1).
In addition, as a pipe installation device for installing a curved pipe with a circular cross section (a pipe whose center line is a curved line) in the ground, a rotation center line along the propulsion direction of the curved pipe is provided on the leading side of the curved pipe. 2. Description of the Related Art A pipe installation device is known that includes a cutter head that rotates as a rotation center, and that can swing the cutter head with the rotation center line of the cutter head intersecting the propulsion direction of the curved pipe (for example, Patent Documents) (See 2nd grade).

特開２０１１−５２５２８号公報JP 2011-52528 A 特開２００５−１５５０５６号公報JP 2005-1555056 A

しかしながら、特許文献１の管設置装置では、地山が硬質地盤である場合、先頭管の先端が硬質地盤に衝突して進行しなくなることがあった。
また、特許文献２の管設置装置では、カッタヘッドが回転可能なようにカッタヘッドの外周面が支持部材によって支持されているので、カッタヘッドの外周面と支持部材との接触支持構造として高精度な摺動装置が必要となり、また、摺動装置における支持部材とカッタヘッドとの接触部が磨耗しやすくなるので、耐久性、コスト等の面で問題がある。
さらに、特許文献１の管設置装置に特許文献２の管設置装置の接触支持構造を採用しようとした場合、上述した耐久性、コスト等の問題ばかりではなく、特許文献１の管設置装置の回転掘削体の回転中心線の向きと特許文献２の管設置装置のカッタヘッドの回転中心線の向きとが異なるため、特許文献１の管設置装置に特許文献２の管設置装置の接触支持構造を採用したとしても、管の進行に先立って管の前方において管の断面積よりも広い断面積を掘削できる構成とはならず、先頭管の先端が硬質地盤に衝突して進行しなくなるという課題を解消できない。
本発明は、管の先頭側に管の推進方向と直交する回転中心線を回転中心として回転する回転掘削体を備え、管の進行に先立って管の前方において管の断面積よりも幅の広い断面積を掘削できるようにして、地山が硬質地盤である場合でも管を地中においてスムーズに推進させることができる管設置装置を提供することを目的とする。 However, in the pipe installation device disclosed in Patent Document 1, when the ground is a hard ground, the tip of the top pipe sometimes collides with the hard ground and does not advance.
Further, in the pipe installation device of Patent Document 2, since the outer peripheral surface of the cutter head is supported by the support member so that the cutter head can rotate, the contact support structure between the outer peripheral surface of the cutter head and the support member is highly accurate. A sliding device is required, and the contact portion between the support member and the cutter head in the sliding device is likely to be worn, and there are problems in terms of durability and cost.
Furthermore, when it is going to employ | adopt the contact support structure of the pipe installation apparatus of patent document 2 to the pipe installation apparatus of patent document 1, not only the above-mentioned problems of durability and cost but also rotation of the pipe installation apparatus of patent document 1 Since the direction of the rotation center line of the excavated body and the direction of the rotation center line of the cutter head of the pipe installation device of Patent Document 2 are different, the contact support structure for the pipe installation device of Patent Document 2 is added to the pipe installation device of Patent Document 1. Even if it is adopted, it is not configured to excavate a cross-sectional area wider than the cross-sectional area of the pipe in front of the pipe, and the tip of the top pipe collides with the hard ground and does not advance. It cannot be resolved.
The present invention includes a rotary excavator that rotates about a rotation center line orthogonal to the propulsion direction of the pipe on the leading side of the pipe, and is wider than the cross-sectional area of the pipe in front of the pipe prior to the progress of the pipe. An object of the present invention is to provide a pipe installation device that can excavate a cross-sectional area and can smoothly promote a pipe in the ground even when a natural ground is hard ground.

本発明によれば、断面四角形状の管を地中に形成された空洞部から地中に設置する場合に、先に地中に入れる管の先頭開口の前方に管の推進方向と直交する面と平行な回転中心線を回転中心として回転する回転掘削体を設置し、管を進行させるとともに回転掘削体で地中を掘削することにより、管を推進させて地中に設置する管設置装置において、回転掘削体の回転中心線を、管の互いに平行に対向する一方の一対の壁面と平行でかつ管の推進方向と直交する面と直交以外の状態で交差する状態に揺動させる掘削機械揺動駆動装置を備え、掘削機械揺動駆動装置は、揺動基板と、揺動基板の案内部材と、揺動基板駆動手段とを備え、案内部材は、筒部と筒部の一端開口を閉塞する底部とを有した断面四角形状の一端閉塞他端開口の有底箱状に形成されて、当該案内部材の筒部の筒の中心線と管の中心線とが同じになるように案内部材の他端開口側を管の先頭開口側に向けて管の先頭開口側の内側に設置され、揺動基板は、管の互いに平行に対向する他方の一対の壁面間の中央を回転中心として揺動可能なように案内部材に取付けられ、管の先頭開口よりも前方に位置された回転掘削体を支持する支柱が揺動基板に支持されており、揺動基板駆動手段が揺動基板における一対の側壁側を前後に移動させることにより、回転掘削体の回転中心線が、管の互いに平行に対向する一方の一対の壁面と平行でかつ管の推進方向と直交する面と直交以外の状態で交差する状態に設定され、揺動基板と案内部材の筒部と案内部材の底部とで囲まれた空間内には、水よりも粘性の高い液体が封入されているので、管の進行に先立って管の前方において管の他方の一対の壁面と直交する方向である管の幅間隔よりも広い幅間隔で地山を掘削できるようになり、管の前方において管の他方の一対の壁面と直交する方向である管の幅方向での余堀が可能となるので、地山が硬質地盤である場合でも管を地中においてスムーズに推進させることが可能となり、また、揺動基板の揺動時において、空間内に封入されている液体が、揺動基板の前方から空間内への泥水の浸入を阻止するので、揺動基板の後方に泥水が充填されて揺動基板の動きが阻害されてしまうような事態を防止でき、揺動基板の揺動動作がスムーズとなる。
また、回転掘削体は、回転中心線を回転中心として回転する回転体と、回転体の外周面より突出するように設けられた掘削ビットとを備え、回転中心線から回転中心線と直交する線上を経由した回転体の外周面までの第１距離と回転中心線から回転中心線と直交する線上を経由した掘削ビットの先端までの第２距離とが異なり、第１距離を半径とした回転体の直径が、管の一方の一対の壁面の内壁面間の寸法よりも小さく設定され、第２距離を掘削半径とした掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも大きく設定されたことにより、回転掘削体が管の先頭開口を介して管の前方及び管の内側に移動可能に構成されたので、管の前方において掘削ビットによる掘削によって管の一方の一対の壁面と直交する方向である管の幅間隔よりも広い幅間隔で地山を掘削できるようになり、管の前方において管の一方の一対の壁面と直交する方向である管の幅方向での余堀が可能となるので、地山が硬質地盤である場合でも管をよりスムーズに推進させることが可能となる。
また、回転掘削体は、回転中心線を回転中心として回転する回転体と、回転体の外周面より突出するように設けられた第１の掘削ビットと第２の掘削ビットとを備え、回転中心線から回転中心線と直交する線上を経由した第１の掘削ビットの先端までの第１距離と回転中心線から回転中心線と直交する線上を経由した第２の掘削ビットの先端までの第２距離とが異なり、第１距離を掘削半径とした第１の掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも小さく設定され、第２距離を掘削半径とした第２の掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも大きく設定されたことにより、回転掘削体が管の先頭開口を介して管の前方及び管の内側に移動可能に構成されたので、管の前方において第２の掘削ビットによる掘削によって管の一方の一対の壁面と直交する方向である管の幅間隔よりも広い幅間隔で地山を掘削できるようになり、管の前方において管の一方の一対の壁面と直交する方向である管の幅方向での余堀が可能となるので、地山が硬質地盤である場合でも管をよりスムーズに推進させることが可能となる。 According to the present invention, when a pipe having a square cross section is installed in the ground from a hollow portion formed in the ground, a surface orthogonal to the propulsion direction of the pipe in front of the top opening of the pipe to be put in the ground first. In a pipe installation device that installs a rotary excavator that rotates around a rotation center line parallel to the axis of rotation, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground Excavating machine rocking that swings the rotation center line of the rotary excavator so that it is parallel to one pair of wall surfaces of the pipe that are parallel to each other and intersects with a plane that is not perpendicular to the plane perpendicular to the propulsion direction of the pipe. The excavating machine rocking drive device includes a rocking substrate, a rocking substrate guide member, and a rocking substrate driving means, and the guide member closes one end opening of the tube portion and the tube portion. A bottomed box with one end closed and the other end open with a rectangular cross section The inner end of the tube at the front opening side with the other end opening side of the guide member facing the head opening side of the tube so that the center line of the tube of the tube portion of the guide member is the same as the center line of the tube The swing board is mounted on the guide member so as to be swingable about the center between the other pair of wall surfaces facing each other in parallel with each other, and is positioned in front of the top opening of the pipe. The support column that supports the rotating excavator is supported by the swinging substrate, and the swinging substrate driving means moves the pair of side walls of the swinging substrate back and forth, so that the rotation center line of the rotating excavator becomes the tube. Are set in a state that is parallel to a pair of wall surfaces facing each other in parallel and intersects with a surface other than orthogonal to a surface orthogonal to the propulsion direction of the tube, and the swinging substrate, the cylindrical portion of the guide member, and the bottom portion of the guide member In the space surrounded by, liquid with higher viscosity than water is sealed. Therefore, prior to the progress of the pipe, the natural ground can be excavated with a width interval wider than the width interval of the pipe in the direction orthogonal to the other pair of wall surfaces of the pipe in front of the pipe. Since it is possible to excavate in the width direction of the pipe, which is the direction orthogonal to the other pair of wall surfaces, even when the natural ground is hard ground, it is possible to smoothly push the pipe in the ground. When the oscillating substrate is oscillated, the liquid sealed in the space prevents the intrusion of muddy water from the front of the oscillating substrate into the space. A situation in which the movement of the moving substrate is hindered can be prevented, and the swinging motion of the swinging substrate becomes smooth.
The rotating excavator includes a rotating body that rotates about the rotation center line and a drilling bit provided so as to protrude from the outer peripheral surface of the rotating body, and is on a line orthogonal to the rotation center line from the rotation center line. The first distance to the outer peripheral surface of the rotating body via the rotation and the second distance from the rotation center line to the tip of the excavation bit via the line perpendicular to the rotation center line are different, and the rotating body has the first distance as a radius. Is set to be smaller than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe, and the drilling diameter by the drilling bit with the second distance as the drilling radius is between the inner wall surfaces of the one pair of wall surfaces of the pipe. Since the rotary excavation body is configured to be movable to the front of the pipe and the inside of the pipe through the top opening of the pipe by being set larger than the dimension, one of the pipes is drilled by the excavation bit in front of the pipe. Direction orthogonal to a pair of wall surfaces It becomes possible to excavate natural ground at a wider interval than the width interval of a certain pipe, and it becomes possible to excavate in the width direction of the pipe, which is the direction perpendicular to one pair of wall surfaces of the pipe in front of the pipe Even when the natural ground is hard ground, the pipe can be more smoothly propelled.
The rotating excavator includes a rotating body that rotates about the rotation center line, and a first excavation bit and a second excavation bit that are provided so as to protrude from the outer peripheral surface of the rotating body. A first distance from the line to the tip of the first excavation bit via a line orthogonal to the rotation center line and a second distance from the rotation center line to the tip of the second excavation bit via a line orthogonal to the rotation center line Unlike the distance, the excavation diameter by the first excavation bit with the first distance as the excavation radius is set smaller than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe, and the second distance is the excavation radius. The excavation diameter by the second excavation bit is set to be larger than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe, so that the rotary excavation body can pass through the front opening of the pipe and the inside of the pipe. It is configured to be movable to the front of the tube The excavation by the second excavation bit makes it possible to excavate a natural ground at a width interval wider than the width interval of the pipe, which is a direction orthogonal to the pair of wall surfaces of the pipe. Since excavation in the width direction of the pipe, which is a direction orthogonal to the wall surface, is possible, the pipe can be more smoothly propelled even when the natural ground is hard ground.

管設置装置の横断面図（実施形態１）。A cross-sectional view of a pipe installation device (embodiment 1). 管設置装置の縦断面図（実施形態１）Longitudinal sectional view of pipe installation device (Embodiment 1) 揺動基板の後面側を後方側から見た図（図２のＡ−Ａ断面相当図）（実施形態１）。The figure which looked at the rear surface side of the rocking | swiveling board from the back side (AA cross-section equivalent figure of FIG. 2) (Embodiment 1). 先頭管の内部構造を示す斜視図（実施形態１）。The perspective view which shows the internal structure of a top pipe (embodiment 1). 回転掘削体の揺動状態を示す図（実施形態１）。The figure which shows the rocking | fluctuation state of a rotary excavation body (Embodiment 1). 地中への管の設置方法を示す図（実施形態１）。The figure which shows the installation method of the pipe | tube in the ground (Embodiment 1). 直管を設置する管設置方法により構築される支保工の例を示す断面図（実施形態１）。Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a straight pipe (embodiment 1). 曲管を設置する管設置方法により構築される支保工の例を示す断面図（実施形態１）。Sectional drawing which shows the example of the support construction constructed | assembled by the pipe installation method which installs a curved pipe (Embodiment 1). 管設置装置の断面図（実施形態３）。Sectional drawing of a pipe installation apparatus (embodiment 3). （ａ）は先頭管の先頭部分を示した斜視図、（ｂ）一対の第２の掘削ビット群の関係を示す断面図（実施形態３）。(A) is the perspective view which showed the head part of the head pipe, (b) Sectional drawing which shows the relationship between a pair of 2nd excavation bit groups (embodiment 3). （ａ）は回転掘削体の掘削時の状態を示す図、（ｂ）は回転掘削体の回収時の姿勢状態を示す図（実施形態３）。(A) is a figure which shows the state at the time of excavation of a rotary excavation body, (b) is a figure which shows the attitude | position state at the time of collection | recovery of a rotary excavation body (Embodiment 3).

実施形態１
図１乃至図８に基づいて、実施形態１による地中への管設置方法を実現するための管設置装置１の基本構成及び動作について説明する。
図１に示すように、管設置装置１は、管２と、掘削装置３と、制御装置６５とを備える。尚、以下、図１における上側を管２や管設置装置１の先頭あるいは前側と定義し、図１における下側を管２や管設置装置１の後側と定義し、図１における左右側を管２や管設置装置１の左右側と定義し、図１の紙面と直交する方向の上下側を管２や管設置装置１の上下側と定義して説明する。 Embodiment 1
Based on FIG. 1 thru | or FIG. 8, the basic composition and operation | movement of the pipe installation apparatus 1 for implement | achieving the pipe installation method in the underground by Embodiment 1 are demonstrated.
As shown in FIG. 1, the pipe installation device 1 includes a pipe 2, a drilling device 3, and a control device 65. In the following, the upper side in FIG. 1 is defined as the head or front side of the tube 2 or the tube installation device 1, the lower side in FIG. 1 is defined as the rear side of the tube 2 or the tube installation device 1, and the left and right sides in FIG. The left and right sides of the tube 2 and the tube installation device 1 are defined, and the upper and lower sides in the direction orthogonal to the paper surface of FIG.

管２は、図６；図８に示すような、円弧を描くように曲がって延長するように形成された曲管（管の中心線が曲線である管）、あるいは、図７に示すような、真っ直ぐに延長する管（管の中心線が直線である管（以下、直管という））であって、管の中心線と直交する面で管を切断した場合の断面形状が四角状の管により形成される。管２としては例えば鋼製の管が用いられる。管２の大きさは、例えば、管の長さ（前後長さ）が１．５ｍ、左右幅が１．２ｍ、上下幅が０．７ｍである。
そして、図６；図８に示すように、複数の曲管が順次連結されて地中１０に設置されることによって円弧を描くように曲がって延長する支保工１１が地中１０に構築されたり、図７に示すように、複数の直管が順次連結されて地中１０に設置されることによって真っ直ぐに延長する支保工１１が地中１０に構築される。
図６に示すように、実施形態１の管設置装置１及び管設置方法によって地中に構築される支保工１１は、先頭に位置される管２（以下、先頭管という）と後続の複数の管２（以下、後続管という）とにより形成される。即ち、支保工１１は、先頭に位置される曲管である先頭管６と先頭管６の後に続くように設けられる後続の複数の曲管である後続管７とにより形成される連続する曲管６７によって構築される。
支保工１１としては、図８（ａ）に示すように、地中１０に形成された一方の空洞部１００と他方の空洞部１００との間に跨るように複数の管２としての複数の曲管を連続させて構築される支保工１１や、図８（ｂ）に示すように、地中１０に形成された空洞部１００から出発して当該空洞部１００に戻るように複数の管２としての複数の曲管を連続させて構築される支保工１１や、図７に示すように、一方の空洞部１００と他方の空洞部１００との間に跨るように複数の管２としての複数の直管を連続させて設置して構築される支保工１１などがある。 The pipe 2 is a curved pipe formed so as to bend and extend so as to draw an arc as shown in FIG. 6; FIG. 8 or a pipe as shown in FIG. A tube that extends straight (a tube whose center line is a straight line (hereinafter referred to as a straight tube)) and has a square cross section when the tube is cut along a plane perpendicular to the center line of the tube. It is formed by. As the pipe 2, for example, a steel pipe is used. The size of the tube 2 is, for example, a tube length (front-rear length) of 1.5 m, a left-right width of 1.2 m, and a vertical width of 0.7 m.
And as shown in FIG. 6; FIG. 8, the support work 11 which bends and extends so that an arc may be drawn may be constructed in the underground 10 by connecting a plurality of bent pipes in sequence and installing them in the underground 10. As shown in FIG. 7, a support work 11 is constructed in the underground 10 that is straightly extended by connecting a plurality of straight pipes sequentially and being installed in the underground 10.
As shown in FIG. 6, the support 11 constructed in the ground by the pipe installation device 1 and the pipe installation method of the first embodiment includes a pipe 2 (hereinafter referred to as the top pipe) positioned at the head and a plurality of subsequent pipes. It is formed by the tube 2 (hereinafter, referred to as a subsequent tube). That is, the supporting work 11 is a continuous curved pipe formed by a leading pipe 6 which is a curved pipe located at the leading end and a succeeding pipe 7 which is a plurality of succeeding curved pipes provided so as to follow the leading pipe 6. 67.
As shown in FIG. 8 (a), the support work 11 includes a plurality of bends as a plurality of pipes 2 so as to straddle between one cavity 100 formed in the ground 10 and the other cavity 100. As shown in FIG. 8 (b), a plurality of pipes 2 start from a cavity 100 formed in the ground 10 and return to the cavity 100, as shown in FIG. 8 (b). As shown in FIG. 7, a plurality of support pipes 11 constructed by continuously connecting a plurality of curved pipes, and a plurality of pipes 2 as a plurality of pipes 2 so as to straddle between one cavity 100 and the other cavity 100. There is a support 11 constructed by installing straight pipes continuously.

図１に示すように、掘削装置３は、掘削機械２６と、掘削機械揺動駆動装置２５と、推進装置７０と、水供給装置７５と、排泥装置７６と、を備える。
掘削機械揺動駆動装置２５は、揺動基板３０と、揺動基板３０の案内部材３１と、揺動基板駆動手段３２とを備える。 As shown in FIG. 1, the excavating apparatus 3 includes an excavating machine 26, an excavating machine swing drive apparatus 25, a propulsion apparatus 70, a water supply apparatus 75, and a mud draining apparatus 76.
The excavating machine swing drive device 25 includes a swing substrate 30, a guide member 31 of the swing substrate 30, and a swing substrate driving means 32.

管設置装置１は、筒部３１ｘと筒部３１ｘの一端開口を閉塞する底部３１ｙとを有した案内部材３１を備え、当該案内部材３１の筒の中心線と先頭管６の管の中心線とが一致するように案内部材３１が他端開口側を先頭管６の先頭開口６ｔ側に向けて先頭管６の先端側の内側に設置されて案内部材３１の筒の外周面３３と先頭管６の内周面６ｘとの間の水密性が保たれ、かつ、揺動基板３０が先頭管６の互いに平行に対向する他方の一対の壁面間の中央（例えば先頭管６の左右の内壁面６ａと内壁面６ｂとの間の中央位置）を回転中心として前後に揺動可能なように案内部材３１に取付けられて揺動基板３０の外周面３９と案内部材３１の筒の内周面３５との間の水密性が保たれた構成とされる。そして、複数の掘削ビット（掘削刃）５２を備えた掘削機械２６の回転掘削体４６が先頭管６の先頭開口６ｔよりも前方に位置されて回転掘削体４６を支持する支柱４２が揺動基板３０に支持された構成を備え、先頭管６の前方の地山９９を回転掘削体４６で掘削する際に、揺動基板駆動手段３２が揺動基板３０における一対の側壁３０ａ；３０ｂ側の後面を押圧及び引き戻して前後に移動させることで、回転掘削体４６の回転中心線Ｌが、先頭管６の推進方向と直交する面及び先頭管６の互いに平行に対向する一方の一対の壁面（例えば先頭管６の上下の内壁面６ｃ；６ｄ）と平行な第１の状態、及び、先頭管６の互いに平行に対向する一方の一対の壁面と平行でかつ先頭管６の推進方向と直交する面と直交以外の状態で交差する第２の状態に設定される。
また、揺動基板３０の後面３０ｘと案内部材３１の筒部３１ｘと案内部材３１の底部３１ｙの前面３１ｆとで囲まれた空間７８内に、水よりも粘性の高い液体を封入したことで、揺動基板３０が揺動する場合に水密性能維持部材１２と案内部材３１の内周面３５との間を介して空間７８内に泥水が流入するのを防止する構成を備える。
案内部材として、底部３１ｙを有しない両端開口の筒状の案内部材を用いた場合においては、揺動基板３０の揺動時に、水密性能維持部材１２と案内部材３１の内周面３５との間を介して揺動基板３０の後方側の先頭管６内に泥水が流入する可能性があり、揺動基板３０の後方側の先頭管６内に泥水が流入すると、排泥できなくなったり、周辺の地下水の水位が下がってしまう可能性がある。さらに、揺動基板３０の揺動時の動きが阻害されてしまう可能性がある。
そこで、上述したように、案内部材として、底部３１ｙを有した案内部材３１を用い、揺動基板３０の後面３０ｘと案内部材３１の筒部３１ｘと案内部材３１の底部３１ｙの前面３１ｆとで囲まれた空間７８内に水よりも粘性の高い液体を封入したことで、揺動基板３０の揺動時に水密性能維持部材１２と案内部材３１の内周面３５との間を介して揺動基板３０の後方に泥水が移動しない構成とした。
即ち、管設置装置１は、先頭管６の前方において回転掘削体４６を左右方向に揺動させるための掘削機械揺動駆動装置２５を備えるので、先頭管６の前方の地山９９を回転掘削体４６で掘削する際に揺動基板駆動手段３２により揺動基板３０を駆動して回転掘削体４６を左右方向に揺動させることができ、回転掘削体４６が左右方向に揺動しない場合と比べて、掘削可能な左右幅を大きくできる。即ち、先頭管６の進行に先立って先頭管６の前方において先頭管６の左右幅間隔（先頭管６の他方の一対の壁面と直交する方向である管の幅間隔）よりも幅の広い左右幅間隔で地山９９を掘削でき、先頭管６の前方において先頭管６の左右幅方向での余堀が可能となるので、先頭管６が推進する際に先頭管６の先頭開口６ｔが地山９９の硬質層に衝突する可能性が少なくなり、先頭管６をスムーズに推進させることができるようになる。
また、空間７８内に水よりも粘性の高い液体を封入したので、揺動基板３０の後方側の先頭管６内への泥水の流入を防止でき、揺動基板３０の前面側に位置する泥水を後述する排泥装置７６により確実に排泥できるようになり、周辺の地下水の水位低下も抑制できる。さらに、揺動基板３０の揺動時の動きが阻害されず、揺動基板３０の揺動動作がスムーズとなる。 The pipe installation device 1 includes a guide member 31 having a cylindrical part 31x and a bottom part 31y that closes one end opening of the cylindrical part 31x, and the center line of the cylinder of the guide member 31 and the center line of the pipe of the leading pipe 6 The guide member 31 is installed on the inner side of the leading end side of the leading tube 6 with the other end opening side facing the leading opening 6t side of the leading tube 6 so as to coincide with each other. Water tightness between the inner peripheral surface 6x of the first pipe 6 and the center of the rocking substrate 30 between the other pair of wall surfaces of the top tube 6 facing each other in parallel (for example, the left and right inner wall surfaces 6a of the head tube 6). And the inner peripheral surface 35 of the guide member 31 and the outer peripheral surface 39 of the guide member 31. It is set as the structure by which the watertightness between was maintained. The rotary excavation body 46 of the excavating machine 26 having a plurality of excavation bits (excavation blades) 52 is positioned in front of the top opening 6t of the top pipe 6, and the column 42 that supports the rotary excavation body 46 is a rocking substrate. 30. When the ground excavation 99 in front of the top pipe 6 is excavated by the rotary excavator 46, the rocking substrate driving means 32 has a pair of side walls 30a; Is pressed and pulled back and moved back and forth, so that the rotation center line L of the rotary excavator 46 has a plane perpendicular to the propulsion direction of the leading pipe 6 and one pair of wall surfaces of the leading pipe 6 facing each other in parallel (for example, A first state parallel to the upper and lower inner wall surfaces 6c; 6d) of the top tube 6, and a surface parallel to one pair of wall surfaces of the top tube 6 facing each other in parallel and orthogonal to the propulsion direction of the top tube 6 The second state that intersects with a state other than orthogonal It is set to.
In addition, a liquid having a higher viscosity than water is sealed in a space 78 surrounded by the rear surface 30x of the swing substrate 30, the cylindrical portion 31x of the guide member 31, and the front surface 31f of the bottom portion 31y of the guide member 31. A configuration is provided that prevents muddy water from flowing into the space 78 between the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 when the swing substrate 30 swings.
In the case where a cylindrical guide member having both ends opened without the bottom 31y is used as the guide member, the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 are not moved when the swing substrate 30 is swung. The muddy water may flow into the front pipe 6 on the rear side of the rocking substrate 30 through the muffler. If the muddy water flows into the front pipe 6 on the rear side of the rocking substrate 30, the mud cannot be drained, There is a possibility that the groundwater level will drop. Furthermore, there is a possibility that the movement of the oscillating substrate 30 is disturbed.
Therefore, as described above, the guide member 31 having the bottom portion 31y is used as the guide member, and is surrounded by the rear surface 30x of the swing substrate 30, the cylindrical portion 31x of the guide member 31, and the front surface 31f of the bottom portion 31y of the guide member 31. By enclosing a liquid having a viscosity higher than water in the space 78, the swinging substrate is interposed between the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 when the swinging substrate 30 swings. It was set as the structure which muddy water does not move behind 30.
That is, the pipe installation device 1 includes the excavating machine swing drive device 25 for swinging the rotary excavator 46 in the left-right direction in front of the top pipe 6, so that the ground 99 in front of the top pipe 6 is rotated and excavated. When excavating with the body 46, the swing excavator 46 can be swung in the left-right direction by driving the swing substrate 30 by the swing substrate driving means 32, and the rotary excavator 46 does not swing in the left-right direction. Compared to this, the width that can be excavated can be increased. That is, prior to the advancement of the leading pipe 6, the left and right widths wider than the lateral width of the leading pipe 6 (the spacing between the pipes in the direction perpendicular to the other pair of wall surfaces of the leading pipe 6) in front of the leading pipe 6 Since the natural mountain 99 can be excavated at the width interval and the front pipe 6 can be dug in the left-right width direction in front of the top pipe 6, the top opening 6t of the top pipe 6 is grounded when the top pipe 6 is propelled. The possibility of colliding with the hard layer of the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.
Further, since a liquid having a higher viscosity than water is sealed in the space 78, it is possible to prevent the inflow of muddy water into the leading pipe 6 on the rear side of the rocking substrate 30, and muddy water located on the front side of the rocking substrate 30. Can be surely drained by the mud draining device 76 described later, and the lowering of the groundwater level in the surrounding area can be suppressed. Further, the movement of the oscillating substrate 30 is not hindered, and the oscillating operation of the oscillating substrate 30 becomes smooth.

先頭管６の先頭開口縁６ｚは、地山９９に食い込みやすいように、先細の傾斜面に形成される。
案内部材３１は、筒部３１ｘと筒部３１ｘの一端開口を閉塞する底部３１ｙとを有した断面四角形状の一端閉塞他端開口の有底箱状に形成される。当該案内部材３１の筒部３１ｘの筒の中心線と先頭管６の管の中心線とが同じになるように、案内部材３１が、他端開口側を先頭管６の先頭開口６ｔ側に向けて先頭管６の先頭開口６ｔ側の内側に設置される。底部３１ｙには、後述の揺動基板駆動用ジャッキ１６のシリンダ１６ａが固定される収容固定部３１ｚが設けられる。収容固定部３１ｚは、底部３１ｙの前面３１ｆに開口し底部３１ｙの前面３１ｆより後方に延長する有底孔により形成される。この有底孔は、図１に示すように底部３１ｙの後面３１ｂより後方に延長する有底孔であってもよいし、底面が底部３１ｙの前面３１ｆと後面３１ｂとの間に位置される有底孔であってもよい。そして、例えば、シリンダ１６ａが収容固定部３１ｚの有底孔に挿入されシリンダ１６ａの周囲に取付けられた図外の取付ブラケットが底部３１ｙの前面３１ｆに図外の固定手段で固定されることにより、揺動基板駆動用ジャッキ１６が底部３１ｙに固定される。
案内部材３１は、案内部材３１の筒部３１ｘの筒の中心線と直交する面で案内部材３１を切断した場合の断面の外周形状が先頭管６の中心線と直交する面で先頭管６を切断した場合の断面の内周形状と同じで、かつ、揺動案内部材３１の断面の外周寸法が先頭管６の断面の内周寸法とほぼ同じ寸法に形成される。
案内部材３１の筒部３１ｘの外周面３３には外周面３３を一周するようにゴムパッキン等の水密性能維持部材３４が設けられており、案内部材３１の筒部３１ｘの外周面３３と先頭管６の内周面６ｘとが数ｍｍ程度（例えば５ｍｍ）の僅かな隙間を介して対向した状態で、かつ、水密性能維持部材３４と先頭管６の内周面６ｘとが接触して、案内部材３１の筒部３１ｘの外周面３３と先頭管６の内周面６ｘとの間の水密性が維持されるように、案内部材３１が先頭管６の先頭開口６ｔ側の内側に設置される。
案内部材３１の筒部３１ｘの内周面３５の左右の側壁面３５ａ；３５ｂは、先頭管６の前後方向に沿って前後の中間部が膨出するよう湾曲する湾曲面に形成される。 The leading opening edge 6z of the leading pipe 6 is formed in a tapered inclined surface so that it can easily bite into the natural ground 99.
The guide member 31 is formed in a bottomed box shape having one end closed other end opening having a square cross section having a cylindrical portion 31x and a bottom portion 31y closing one end opening of the cylindrical portion 31x. The other end opening side of the guide member 31 faces the front opening 6t side of the top tube 6 so that the center line of the tube portion 31x of the guide member 31 and the center line of the top tube 6 are the same. And installed inside the top opening 6t side of the top pipe 6. The bottom 31y is provided with an accommodation fixing portion 31z to which a cylinder 16a of a swing board driving jack 16 described later is fixed. The housing fixing portion 31z is formed by a bottomed hole that opens to the front surface 31f of the bottom portion 31y and extends rearward from the front surface 31f of the bottom portion 31y. The bottomed hole may be a bottomed hole extending rearward from the rear surface 31b of the bottom portion 31y as shown in FIG. 1, or the bottom surface may be located between the front surface 31f and the rear surface 31b of the bottom portion 31y. It may be a bottom hole. And, for example, the cylinder 16a is inserted into the bottomed hole of the housing fixing portion 31z and the mounting bracket (not shown) attached around the cylinder 16a is fixed to the front surface 31f of the bottom 31y by fixing means (not shown). The swing substrate driving jack 16 is fixed to the bottom 31y.
When the guide member 31 is cut along a plane orthogonal to the center line of the cylinder of the cylindrical portion 31x of the guide member 31, the outer peripheral shape of the cross section when the guide member 31 is cut is a plane orthogonal to the center line of the top pipe 6. The outer peripheral dimension of the cross section of the swing guide member 31 is formed to be substantially the same as the inner peripheral dimension of the cross section of the top tube 6 in the same manner as the inner peripheral shape of the cross section when cut.
A watertight performance maintaining member 34 such as rubber packing is provided on the outer peripheral surface 33 of the cylindrical portion 31x of the guide member 31 so as to go around the outer peripheral surface 33, and the outer peripheral surface 33 of the cylindrical portion 31x of the guide member 31 and the top tube 6 with the inner peripheral surface 6x facing each other with a slight gap of about several millimeters (for example, 5 mm), and the watertightness performance maintaining member 34 and the inner peripheral surface 6x of the top tube 6 are in contact with each other. The guide member 31 is installed inside the leading opening 6t side of the leading tube 6 so that the watertightness between the outer peripheral surface 33 of the cylindrical portion 31x of the member 31 and the inner circumferential surface 6x of the leading tube 6 is maintained. .
The left and right side wall surfaces 35a; 35b of the inner peripheral surface 35 of the cylindrical portion 31x of the guide member 31 are formed as curved surfaces that curve so that the front and rear intermediate portions bulge along the front-rear direction of the top tube 6.

揺動基板３０は、外周形状が案内部材３１の内周形状に合致した四角形状の平板により形成される。この揺動基板３０を形成する平板は、前後方向に沿った板厚を有し、平板の左右の側壁３０ａ；３０ｂは、案内部材３１の左右の側壁面３５ａ；３５ｂの湾曲面と平行に対向する湾曲面に形成される。揺動基板３０を形成する平板の上下の端面における左右間の中央位置には例えば円柱状の突起３７；３７（図２；図３参照）が設けられる。この突起３７；３７が案内部材３１の筒の上下の内面に形成された円孔３８；３８内に嵌合されたことで、この突起３７；３７が揺動基板３０の回転中心線として機能し、この回転中心線を回転中心として揺動基板３０の左右側が前後方向に揺動可能に構成される。
揺動基板３０の平板の外周面３９には外周面３９を一周するようにゴムパッキン等の水密性能維持部材１２が設けられ、揺動基板３０の平板の外周面３９と案内部材３１の内周面３５とが数ｍｍ程度（例えば５ｍｍ）の僅かな隙間を介して対向した状態で、かつ、水密性能維持部材１２と案内部材３１の内周面３５とが接触することにより、揺動基板３０の平板の外周面３９と案内部材３１の筒体の内周面３５との間の水密性が維持される。 The swing substrate 30 is formed by a rectangular flat plate whose outer peripheral shape matches the inner peripheral shape of the guide member 31. The flat plate forming the oscillating substrate 30 has a thickness along the front-rear direction, and the left and right side walls 30a; 30b of the flat plate face the curved surfaces of the left and right side wall surfaces 35a; 35b of the guide member 31 in parallel. Formed on the curved surface. For example, cylindrical protrusions 37; 37 (see FIG. 2 and FIG. 3) are provided at the center position between the left and right of the upper and lower end faces of the flat plate forming the swing substrate 30. The projections 37 and 37 are fitted into circular holes 38 and 38 formed on the upper and lower inner surfaces of the cylinder of the guide member 31, so that the projections 37 and 37 function as a rotation center line of the swing substrate 30. The left and right sides of the swing substrate 30 are configured to be swingable in the front-rear direction with the rotation center line as the rotation center.
A watertight performance maintaining member 12 such as rubber packing is provided on the outer peripheral surface 39 of the flat plate of the rocking substrate 30 so as to go around the outer peripheral surface 39, and the inner peripheral surface of the flat plate outer peripheral surface 39 of the rocking substrate 30 and the guide member 31. The surface 35 is opposed to the surface 35 with a slight gap of about several mm (for example, 5 mm), and the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31 are in contact with each other, whereby the oscillating substrate 30. The watertightness between the outer peripheral surface 39 of the flat plate and the inner peripheral surface 35 of the cylindrical body of the guide member 31 is maintained.

図１；図３に示すように、揺動基板３０、及び、案内部材３１には、揺動基板３０の平板や案内部材３１の底部３１ｙの収容固定部３１ｚ以外の平板部を前後に貫通する支柱保持貫通孔１３、排泥管保持貫通孔１４、水供給管保持貫通孔１５が形成される。図３に示すように、例えば、支柱保持貫通孔１３は、揺動基板３０の中央部、及び、案内部材３１の中央部を貫通するように形成され、排泥管保持貫通孔１４は、揺動基板３０の下部側の左右、及び、案内部材３１の下部側の左右をそれぞれ貫通するように２つ設けられる。水供給管保持貫通孔１５は、揺動基板３０の上部側の左右、及び、案内部材３１の上部側の左右をそれぞれ貫通するように２つ設けられる。
揺動基板３０の支柱保持貫通孔１３には、掘削機械２６の支持部４０の支柱４２が貫通した状態で固定される。揺動基板３０の排泥管保持貫通孔１４；１４には、排泥管７６ｃの前側部分７６ｘが貫通した状態で固定される。揺動基板３０の水供給管保持貫通孔１５；１５には、水供給管７５ｃの前側部分７５ｘが貫通した状態で固定される。
案内部材３１の支柱保持貫通孔１３には、揺動基板３０の支柱保持貫通孔１３を貫通した掘削機械２６の支持部４０の支柱４２の後端に連結された可撓性を有した可撓支持筒材４２ａが貫通した状態で固定される。
例えば、支柱４２は後述する耐圧ホース５６を収容する鋼管により形成され、可撓支持筒材４２ａは耐圧ホース５６を収容する硬質ビニル製の蛇腹管により形成される。
案内部材３１の排泥管保持貫通孔１４；１４には、排泥管７６ｃの可撓性を有した主部分７６ｙが貫通した状態で保持される。案内部材３１の排泥管保持貫通孔１４の内周面、又は、主部分７６ｙの外周面には、ゴムパッキン等の水密性能維持部材１４ａが設けられ、案内部材３１の排泥管保持貫通孔１４と主部分７６ｙとの間の水密性が維持される（図２参照）。
案内部材３１の水供給管保持貫通孔１５；１５には、水供給管７５ｃの可撓性を有した主部分７５ｙが貫通した状態で保持される。案内部材３１の水供給管保持貫通孔１５の内周面、又は、主部分７５ｙの外周面には、ゴムパッキン等の水密性能維持部材１５ａが設けられ、案内部材３１の水供給管保持貫通孔１５と主部分７５ｙとの間の水密性が維持される（図２参照）。
尚、支柱４２と支柱保持貫通孔１３とを溶接等で剛接合し、空間７８内に充填された水よりも粘性の高い液体中に位置される支柱４２の一部を可撓性部に形成してもよい。同様に、排泥管７６ｃと排泥管保持貫通孔１４とを溶接等で剛接合し、空間７８内に充填された水よりも粘性の高い液体中に位置される排泥管７６ｃの一部を可撓性部に形成してもよい。また、水供給管７５ｃと水供給管保持貫通孔１５とを溶接等で剛結合し、空間７８内に充填された水よりも粘性の高い液体中に位置される水供給管７５ｃの一部を可撓性部に形成してもよい。
例えば鋼製の支柱４２と支柱保持貫通孔１３の鋼製孔壁とを溶接等で剛接合し、空間７８内の液体中に位置される支柱４２の一部分を蛇腹管、硬質ゴム製の可撓管等の可撓性部で形成したり、鋼製の排泥管７６ｃと排泥管保持貫通孔１４の鋼製孔壁とを溶接等で剛接合するとともに、鋼製の水供給管７５ｃと水供給管保持貫通孔１５の鋼製孔壁とを溶接等で剛結合し、空間７８内の液体中に位置される排泥管７６ｃの一部分、及び、水供給管７５ｃの一部分を蛇腹管、硬質ゴム製の可撓管等の可撓性部で形成してもよい。 As shown in FIG. 1; FIG. 3, the rocking substrate 30 and the guide member 31 penetrate back and forth through a flat plate portion other than the flat plate of the rocking substrate 30 and the accommodation fixing portion 31z of the bottom 31y of the guide member 31. A support holding through hole 13, a drainage pipe holding through hole 14, and a water supply pipe holding through hole 15 are formed. As shown in FIG. 3, for example, the support holding hole 13 is formed so as to pass through the central part of the swing substrate 30 and the central part of the guide member 31. Two are provided so as to penetrate the left and right of the lower side of the moving substrate 30 and the left and right of the lower side of the guide member 31, respectively. Two water supply pipe holding through-holes 15 are provided so as to penetrate the left and right on the upper side of the swing substrate 30 and the left and right on the upper side of the guide member 31, respectively.
The support 42 of the excavating machine 26 is fixed to the support holding through hole 13 of the swinging substrate 30 in a state where the support 42 penetrates. The front portion 76x of the sludge pipe 76c is fixed in a state where it passes through the sludge pipe holding through holes 14; 14 of the swing substrate 30. The front side portion 75x of the water supply pipe 75c is fixed to the water supply pipe holding through hole 15;
The support member through hole 13 of the guide member 31 is flexible and connected to the rear end of the support column 40 of the support portion 40 of the excavating machine 26 that passes through the support column holding hole 13 of the swing substrate 30. The support cylinder 42a is fixed in a penetrating state.
For example, the support column 42 is formed of a steel pipe that accommodates a pressure hose 56 described later, and the flexible support cylinder 42 a is formed of a hard vinyl bellows tube that accommodates the pressure hose 56.
The mud pipe holding through-holes 14; 14 of the guide member 31 are held in a state in which the flexible main part 76y of the mud pipe 76c is penetrated. A watertight performance maintaining member 14a such as rubber packing is provided on the inner peripheral surface of the drainage pipe holding through-hole 14 of the guide member 31 or the outer peripheral surface of the main portion 76y, and the mud pipe holding through-hole of the guide member 31 is provided. 14 and the main portion 76y are maintained watertight (see FIG. 2).
The flexible main portion 75y of the water supply pipe 75c is held in the water supply pipe holding through hole 15; On the inner peripheral surface of the water supply pipe holding through-hole 15 of the guide member 31 or the outer peripheral surface of the main portion 75y, a water-tight performance maintaining member 15a such as rubber packing is provided, and the water supply pipe holding through-hole of the guide member 31 is provided. The watertightness between 15 and the main portion 75y is maintained (see FIG. 2).
The strut 42 and the strut holding through hole 13 are rigidly joined by welding or the like, and a part of the strut 42 located in a liquid having a higher viscosity than water filled in the space 78 is formed in the flexible portion. May be. Similarly, a part of the sludge pipe 76c positioned in a liquid having a higher viscosity than the water filled in the space 78 by rigidly joining the sludge pipe 76c and the drainage pipe holding through hole 14 by welding or the like. May be formed in the flexible part. Further, the water supply pipe 75c and the water supply pipe holding through-hole 15 are rigidly connected by welding or the like, and a part of the water supply pipe 75c located in the liquid having higher viscosity than the water filled in the space 78 is disposed. You may form in a flexible part.
For example, the steel column 42 and the steel hole wall of the column holding through hole 13 are rigidly joined by welding or the like, and a part of the column 42 positioned in the liquid in the space 78 is a bellows tube or a hard rubber flexible member. It is formed by a flexible part such as a pipe, or a steel drainage pipe 76c and a steel hole wall of the drainage pipe holding through hole 14 are rigidly joined by welding or the like, and a steel water supply pipe 75c A steel hole wall of the water supply pipe holding through hole 15 is rigidly connected by welding or the like, and a part of the mud pipe 76c located in the liquid in the space 78 and a part of the water supply pipe 75c are a bellows pipe, You may form with flexible parts, such as a flexible tube made from hard rubber.

上記空間７８内には、水よりも粘性の高い液体として、例えば、グリス８８が封入されている。空間７８内にグリス８８が封入されていることにより、揺動基板３０が揺動した場合において、水密性能維持部材１２と案内部材３１の内周面３５との間を介して空間７８内に泥水が流入しようとしても空間７８内にグリス８８が充填されているので泥水が空間７８内に流入できない。このように、空間７８内への泥水の流入を防止できるので、空間７８内に泥水が流入してしまって揺動基板３０の動きが悪くなってしまうような事態を抑制でき、揺動基板３０の揺動動作がスムーズとなる。   For example, grease 88 is enclosed in the space 78 as a liquid having a higher viscosity than water. Since the grease 88 is sealed in the space 78, when the swing substrate 30 swings, the muddy water enters the space 78 through the space between the watertight performance maintaining member 12 and the inner peripheral surface 35 of the guide member 31. Even if it is about to flow in, muddy water cannot flow into the space 78 because the space 88 is filled with the grease 88. Thus, since the inflow of muddy water into the space 78 can be prevented, a situation in which the muddy water flows into the space 78 and the movement of the oscillating substrate 30 is deteriorated can be suppressed. Swaying motion becomes smooth.

揺動基板駆動手段３２は、揺動基板駆動用ジャッキ１６と、上述した収容固定部３１ｚとを備える。
揺動基板駆動用ジャッキ１６は、例えば、油圧ジャッキにより構成される。
揺動基板駆動用ジャッキ１６は、２個設けられ、揺動基板３０の後方における左右側にそれぞれ１つずつ配置される。
揺動基板駆動用ジャッキ１６が収容固定部３１ｚに固定されたことで、収容固定部３１ｚが揺動基板駆動用ジャッキ１６の設置部及び反力受け部として機能する。
左側の揺動基板駆動用ジャッキ１６Ａは、揺動基板３０の後面３０ｘにおける左端側の上下中央側を押圧かつ引き戻すことが可能なようにピストンロッド１６ｂの先端と揺動基板３０の後面３０ｘとがピン接合のような接続手段２２により接続されている。
右側の揺動基板駆動用ジャッキ１６Ｂは、揺動基板３０の後面３０ｘにおける右端側の上下中央側を押圧かつ引き戻すことが可能なようにピストンロッド１６ｂの先端と揺動基板３０の後面３０ｘとがピン接合のような接続手段２２により接続されている。 The swinging substrate driving means 32 includes the swinging substrate driving jack 16 and the accommodation fixing portion 31z described above.
The swing substrate driving jack 16 is constituted by, for example, a hydraulic jack.
Two oscillating substrate driving jacks 16 are provided, and one oscillating substrate driving jack 16 is disposed on each of the left and right sides of the oscillating substrate 30 at the rear.
Since the rocking substrate driving jack 16 is fixed to the housing fixing portion 31z, the housing fixing portion 31z functions as an installation portion and a reaction force receiving portion of the rocking substrate driving jack 16.
The left oscillating board driving jack 16A has a front end of the piston rod 16b and a rear surface 30x of the oscillating board 30 so that the upper and lower central sides on the left end side of the rear surface 30x of the oscillating board 30 can be pressed and pulled back. They are connected by connecting means 22 such as pin bonding.
The right oscillating board driving jack 16B has a front end of the piston rod 16b and a rear surface 30x of the oscillating board 30 so that the upper and lower central sides on the right end side of the rear surface 30x of the oscillating board 30 can be pressed and pulled back. They are connected by connecting means 22 such as pin bonding.

掘削機械２６は、支持部４０と、回転部４１とを備える。
支持部４０は、１つの支柱４２と２つの分岐支柱４３とが組合されたＴ字状の中空支柱により形成される。２つの分岐支柱４３は、支柱４２の先端部より支柱４２の延長方向と直交する一直線上において互いに離れる方向に延長する。
回転部４１は、回転機構部４５と、回転掘削体４６とを備える。回転機構部４５は、例えばモータ４７により構成される。分岐支柱４３の両方の先端には、それぞれモータマウント４４が設けられ、各モータマウント４４；４４には、モータ４７のケーシング４８が固定される。２つのモータ４７；４７の回転軸４９；４９は、支柱４２の先端部より支柱の延長方向と直交する一直線上（即ち、分岐支柱４３の中心線線上）において互いに離れる方向に延長する。
回転掘削体４６は、例えば円筒部５０ａと円筒部５０ａの他端を閉塞する底板５０ｂとを有した一端開口他端閉塞の円形箱状の回転体５０と、回転体５０の円筒部５０ａの外周面５１に設けられた複数の掘削ビット５２とを備えた構成である。 The excavating machine 26 includes a support unit 40 and a rotating unit 41.
The support portion 40 is formed by a T-shaped hollow column in which one column 42 and two branch columns 43 are combined. The two branch columns 43 extend in a direction away from each other on a straight line perpendicular to the extending direction of the columns 42 from the distal end portion of the column 42.
The rotating unit 41 includes a rotating mechanism unit 45 and a rotating excavator 46. The rotation mechanism unit 45 is configured by a motor 47, for example. Motor mounts 44 are provided at both ends of the branch column 43, and a casing 48 of a motor 47 is fixed to each motor mount 44; 44. The rotating shafts 49; 49 of the two motors 47; 47 extend in directions away from each other on a straight line perpendicular to the extending direction of the support column (that is, on the center line of the branch support column 43) from the tip end of the support column 42.
The rotary excavator 46 includes, for example, a circular box-shaped rotary body 50 having one end opening and the other end closed, which includes a cylindrical portion 50a and a bottom plate 50b that closes the other end of the cylindrical portion 50a, and an outer periphery of the cylindrical portion 50a of the rotary body 50. A plurality of excavation bits 52 provided on the surface 51 are provided.

モータ４７は、例えば、流体圧により作動するモータ、あるいは、電気で作動するモータを用いる。例えば油圧モータ（以下、油圧モータ４７と言う）を用いる場合、駆動源２７としての油圧源５５と油圧モータ４７のケーシング４８内とが圧油供給路５６ａ及び油帰還路５６ｂを形成する耐圧ホース５６で繋がれる。即ち、耐圧ホース５６は支持部４０のＴ字状の中空路を介して油圧モータ４７のケーシング４８に接続される。油圧モータ４７は、耐圧ホース５６を介してケーシング４８内に供給される圧油によって回転軸４９が回転するように構成される。
例えば、回転掘削体４６の回転体５０の底板５０ｂの内面５３の円中心と回転軸４９の回転中心とが一致するように、回転体５０の底板５０ｂの内面５３と油圧モータ４７により回転する回転軸４９の先端に設けられた連結板５４とがねじ等の連結具５７により連結される。即ち、２つの回転掘削体４６；４６が先頭管６の先頭開口６ｔよりも前方に位置され、２つの回転掘削体４６；４６が２つの回転軸４９；４９に共通の１つの回転中心線Ｌを回転中心として回転するように構成される。このような２つの回転掘削体４６；４６を備えた構成は、ツインヘッダと呼ばれる。
実施形態１では、上述したように、２つの回転掘削体４６；４６の回転中心線Ｌが先頭管６の推進方向と直交する面と平行な状態及び先頭管６の上下の内壁面と平行な第１の状態で地山９９を掘削した場合、推進方向と直交する面内における回転掘削体４６の掘削幅を大きくでき、さらに、断面四角形状に掘削できるので、掘削幅に応じた四角幅の管２を容易に地中１０に設置できるようになる。
さらに、実施形態１では、掘削機械揺動駆動装置２５を作動させ、図５に示すように、２つの回転掘削体４６；４６の回転中心線Ｌが先頭管６の推進方向と直交する面と交差しかつ先頭管６の上下の内壁面と平行な第２の状態で地山９９を掘削した場合、先頭管６の前方において先頭管６の左右幅間隔よりも広い左右幅間隔で地山９９を掘削できるので、先頭管６が推進する際に先頭管６の先頭開口６ｔが地山９９の硬質層に衝突する可能性が少なくなり、先頭管６をスムーズに推進させることができるようになる。 As the motor 47, for example, a motor that operates by fluid pressure or a motor that operates by electricity is used. For example, when a hydraulic motor (hereinafter referred to as a hydraulic motor 47) is used, a pressure hose 56 in which a hydraulic source 55 as the drive source 27 and the casing 48 of the hydraulic motor 47 form a pressure oil supply path 56a and an oil return path 56b. Connected with That is, the pressure hose 56 is connected to the casing 48 of the hydraulic motor 47 through the T-shaped hollow path of the support portion 40. The hydraulic motor 47 is configured such that the rotating shaft 49 is rotated by pressure oil supplied into the casing 48 via the pressure hose 56.
For example, the rotation rotated by the hydraulic motor 47 and the inner surface 53 of the bottom plate 50b of the rotating body 50 so that the circle center of the inner surface 53 of the bottom plate 50b of the rotating body 50 of the rotary excavator 46 and the rotation center of the rotating shaft 49 coincide. A connecting plate 54 provided at the tip of the shaft 49 is connected by a connecting tool 57 such as a screw. That is, the two rotary excavating bodies 46; 46 are positioned in front of the leading opening 6t of the leading pipe 6, and the two rotary excavating bodies 46; 46 are one rotation center line L common to the two rotating shafts 49; 49. Is configured to rotate around the center of rotation. Such a configuration including two rotary excavating bodies 46; 46 is called a twin header.
In the first embodiment, as described above, the rotation center line L of the two rotary excavating bodies 46; 46 is parallel to the plane orthogonal to the propulsion direction of the leading pipe 6 and parallel to the upper and lower inner wall surfaces of the leading pipe 6. When the natural ground 99 is excavated in the first state, the excavation width of the rotary excavation body 46 in the plane orthogonal to the propulsion direction can be increased, and further, the excavation can be performed in a quadrangular cross section. The pipe 2 can be easily installed in the underground 10.
Further, in the first embodiment, the excavating machine swing driving device 25 is operated, and as shown in FIG. 5, the rotation center line L of the two rotary excavating bodies 46; 46 is a surface perpendicular to the propulsion direction of the top pipe 6. When the natural ground 99 is excavated in a second state that intersects and is parallel to the upper and lower inner wall surfaces of the top pipe 6, the natural ground 99 has a width interval that is wider than the left and right width intervals of the top pipe 6 in front of the top pipe 6. Therefore, when the leading pipe 6 is propelled, the possibility that the leading opening 6t of the leading pipe 6 collides with the hard layer of the natural ground 99 is reduced, and the leading pipe 6 can be smoothly propelled. .

推進装置７０は、推進駆動源６１と、上述した案内部材３１と、推進駆動源６１による推進力を案内部材３１に伝達する推進力伝達手段６２と、案内部材３１に伝達された推進力を先頭管６に伝達する推進力受け部６３とを備える。
推進力受け部６３は、先頭管６の先頭開口６ｔ側の内側に設置された案内部材３１の筒の前端面３１ａに接触して案内部材３１の前方への移動を規制するとともに案内部材３１に伝達された推進力を先頭管６に伝達することができるように、先頭管６の先頭開口６ｔ側の内面に溶接、ボルト・ナット等の固定手段で固定されている。
推進力伝達手段６２は、推進力伝達棒状体７１と、推進力伝達用の当て材７２とを備える。 The propulsion device 70 includes a propulsion drive source 61, the above-described guide member 31, propulsion force transmission means 62 that transmits the propulsive force generated by the propulsion drive source 61 to the guide member 31, and the propulsive force transmitted to the guide member 31 at the head. And a propulsive force receiving portion 63 that transmits to the tube 6.
The propulsive force receiving portion 63 is in contact with the front end surface 31a of the cylinder of the guide member 31 installed on the inner side of the front opening 6t of the front tube 6 to restrict the forward movement of the guide member 31 and to the guide member 31. In order to be able to transmit the propulsive force transmitted to the leading pipe 6, it is fixed to the inner surface of the leading pipe 6 on the leading opening 6t side by fixing means such as welding, bolts and nuts.
The propulsive force transmitting means 62 includes a propulsive force transmitting rod-like body 71 and a propelling force transmitting member 72.

推進力伝達棒状体７１は、一端から他端までの長さが案内部材３１の底部３１ｙの後面３１ｂと先頭管６の後端面１０２ｅとの間の最短距離よりも長い寸法に形成された棒状体である。推進力伝達棒状体７１としては例えばＨ形鋼を用いる。
推進力伝達棒状体７１は、中心線が先頭管６の中心線と同一方向を向くように設置される。左側の推進力伝達棒状体７１Ａの先端面と案内部材３１の底部３１ｙの後面３１ｂにおける左側部の上下の中央位置とが連結され、右側の推進力伝達棒状体７１Ｂの先端面と案内部材３１の底部３１ｙの後面３１ｂにおける右側部の上下の中央位置とが連結される。 The propulsive force transmission rod 71 has a length from one end to the other end longer than the shortest distance between the rear surface 31b of the bottom 31y of the guide member 31 and the rear end surface 102e of the leading tube 6. It is. As the propulsive force transmission rod-shaped body 71, for example, H-shaped steel is used.
The propulsive force transmission rod-like body 71 is installed such that the center line faces the same direction as the center line of the leading pipe 6. The front end surface of the left propulsive force transmitting rod-shaped body 71A and the upper and lower central positions of the left side portion of the rear surface 31b of the bottom portion 31y of the guide member 31 are connected, and the front end surface of the right propulsive force transmitting rod-shaped body 71B and the guide member 31 are connected. The upper and lower central positions of the right side portion of the rear surface 31b of the bottom portion 31y are connected.

推進駆動源６１は、例えば、油圧ジャッキ６１Ａにより構成される。油圧ジャッキ６１Ａのピストンロッド６１ａの先端には押圧板６１ｂが設けられる。油圧ジャッキ６１のシリンダ６１ｃは図外のジャッキ反力受部材に固定されている。   The propulsion drive source 61 is constituted by, for example, a hydraulic jack 61A. A pressing plate 61b is provided at the tip of the piston rod 61a of the hydraulic jack 61A. The cylinder 61c of the hydraulic jack 61 is fixed to a jack reaction force receiving member (not shown).

そして、当て材７２を、先頭管６の後端面１０２ｅより後方に突出する左右の推進力伝達棒状体７１Ａ；７１Ｂの他端間に跨るように設置して左右の推進力伝達棒状体７１Ａ；７１Ｂの他端に図外のボルトや万力装置などで連結し、当て材７２における左右の推進力伝達棒状体７１Ａ；７１Ｂの他端間の中央部分を油圧ジャッキ６１Ａの押圧板６１ｂで押圧することにより、油圧ジャッキ６１Ａによる押圧力が、推進力伝達棒状体７１、案内部材３１、推進力受け部６３を介して先頭管６及び回転掘削体４６；４６に伝達されるので、先頭管６が前方に推進するとともに回転掘削体４６；４６が前方に推進する。
この場合、左右の推進力伝達棒状体７１Ａ；７１Ｂにより、案内部材３１の底部３１ｙの後面３１ｂにおける左右両側の上下の中央位置を押圧するので、案内部材３１に推進力を均等に伝達でき、案内部材３１の姿勢を安定に維持することができ、しかも、掘削機械揺動駆動装置２５の揺動動作の安定化が図れる。 And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end face 102e of the leading pipe 6, and the left and right propelling force transmitting rod-like bodies 71A; 71B Are connected to the other end by a bolt or a vise device not shown in the figure, and the central portion between the other ends of the left and right propulsive force transmitting rods 71A; 71B in the abutting member 72 is pressed by the pressing plate 61b of the hydraulic jack 61A. Thus, the pressing force by the hydraulic jack 61A is transmitted to the leading pipe 6 and the rotary excavating body 46; 46 via the propulsive force transmitting rod 71, the guide member 31, and the propelling force receiving portion 63, so that the leading pipe 6 is moved forward. And the rotary excavator 46; 46 propels forward.
In this case, the left and right propulsive force transmission rods 71A; 71B press the upper and lower central positions on the left and right sides of the rear surface 31b of the bottom 31y of the guide member 31, so that the propulsive force can be evenly transmitted to the guide member 31 and guided. The posture of the member 31 can be stably maintained, and the swing operation of the excavating machine swing drive device 25 can be stabilized.

水供給装置７５は、水貯留タンク７５ａと、送水用のポンプ７５ｂと、水供給管７５ｃと、水供給管７５ｃの前端開口部を保持する水供給管保持貫通孔１５とを備える。
水供給管７５ｃは、前側部分７５ｘと当該前側部分７５ｘの後端に連結されて先頭管６の後端開口より外部に延長する主部分７５ｙとを備える。例えば、前側部分７５ｘは鋼管により形成され、主部分７５ｙは硬質ビニル製の蛇腹管により形成される。
揺動基板３０の前面３０ｆの前方の地山９９に水を放出することが可能なように前側部分７５ｘの前端開口側が揺動基板３０の水供給管保持貫通孔１５に固定され、前側部分７５ｘの後端開口側が揺動基板３０の後面３０ｘより後方に突出するように設けられる。前側部分７５ｘの後端開口と主部分７５ｙの前端開口とが連通可能に連結される。主部分７５ｙが案内部材３１の水供給管保持貫通孔１５を貫通するように設けられ、主部分７５ｙの後端開口と送水用のポンプ７５ｂの吐出口とが連通可能に連結される。そして、送水用のポンプ７５ｂの吸込口と水貯留タンク７５ａとが図外の連結管により連通可能に連結される。水供給装置７５は、先頭管６の上部内側の左右側に２系統設けられる。尚、揺動基板３０が揺動した場合に水供給管７５ｃが先頭管６の左右の内側面に接触しないように、前側部分７５ｘは、前端開口が先頭管６の内側面側に位置されて後端開口が先頭管６の中央側に位置するように設けられる。換言すれば、前側部分７５ｘは、管の中心線が先頭管６の内側面６ａ；６ｂ側から先頭管６の中央側に傾斜して延長するように設けられる。 The water supply device 75 includes a water storage tank 75a, a pump 75b for water supply, a water supply pipe 75c, and a water supply pipe holding through hole 15 that holds a front end opening of the water supply pipe 75c.
The water supply pipe 75c includes a front part 75x and a main part 75y connected to the rear end of the front part 75x and extending outward from the rear end opening of the leading pipe 6. For example, the front portion 75x is formed of a steel pipe, and the main portion 75y is formed of a hard vinyl bellows tube.
The front end opening side of the front portion 75x is fixed to the water supply pipe holding through hole 15 of the swing substrate 30 so that water can be discharged to the natural ground 99 in front of the front surface 30f of the swing substrate 30 and the front portion 75x. The rear end opening side is provided so as to protrude rearward from the rear surface 30x of the swing substrate 30. The rear end opening of the front portion 75x and the front end opening of the main portion 75y are connected so as to communicate with each other. The main portion 75y is provided so as to penetrate the water supply pipe holding through-hole 15 of the guide member 31, and the rear end opening of the main portion 75y and the discharge port of the water supply pump 75b are connected so as to communicate with each other. And the suction port of the pump 75b for water supply and the water storage tank 75a are connected so that communication is possible by the connecting pipe outside a figure. Two systems of water supply devices 75 are provided on the left and right sides inside the upper portion of the top pipe 6. Note that the front end opening of the front portion 75x is positioned on the inner surface side of the head tube 6 so that the water supply tube 75c does not contact the left and right inner surfaces of the head tube 6 when the rocking substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 75x is provided such that the center line of the tube extends while being inclined from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6.

排泥装置７６は、排泥タンク７６ａと、排泥用のポンプ７６ｂと、排泥管７６ｃと、排泥管７６ｃの前端開口部を保持する排泥管保持貫通孔１４とを備える。
排泥管７６ｃは、排泥管保持貫通孔１４に保持される前側部分７６ｘと当該前側部分７６ｘの後端に連結されて先頭管６の後端開口より外部に延長する主部分７６ｙとを備える。例えば、前側部分７６ｘは鋼管により形成され、主部分７６ｙは硬質ビニル製の蛇腹管により形成される。
揺動基板３０の前面３０ｆより前方に集まった掘削土を前端開口を介して取り込むことが可能なように前側部分７６ｘの前端開口側が揺動基板３０の排泥管保持貫通孔１４に固定され、前側部分７６ｘの後端開口側が揺動基板３０の後面３０ｘより後方に突出するように設けられる。前側部分７６ｘの後端開口と主部分７６ｙの前端開口とが連通可能に連結される。主部分７６ｙが案内部材３１の排泥管保持貫通孔１４を貫通するように設けられ、主部分７６ｙの後端開口と排泥用のポンプ７６ｂの吸込口とが連通可能に連結される。そして、排泥用のポンプ７６ｂの吐出口と排泥タンク７６ａとが図外の連結管により連通可能に連結される。排泥装置７６は、先頭管６の下部内側の左右側に２系統設けられる。尚、揺動基板３０が揺動した場合に排泥管７６ｃが先頭管６の左右の内側面に接触しないように、前側部分７６ｘは、前端開口が先頭管６の内側面側に位置されて後端開口が先頭管６の中央側に位置するように設けられる。換言すれば、前側部分７６ｘは、管の中心線が先頭管６の内側面６ａ；６ｂ側から先頭管６の中央側に傾斜して延長するように設けられる。 The mud drain device 76 includes a mud tank 76a, a pump 76b for mud, a mud pipe 76c, and a mud pipe holding through hole 14 that holds the front end opening of the mud pipe 76c.
The drainage pipe 76c includes a front part 76x held in the drainage pipe holding through hole 14 and a main part 76y connected to the rear end of the front part 76x and extending outward from the rear end opening of the leading pipe 6. . For example, the front portion 76x is formed of a steel pipe, and the main portion 76y is formed of a hard vinyl bellows tube.
The front end opening side of the front portion 76x is fixed to the drainage pipe holding through hole 14 of the swinging substrate 30 so that the excavated soil gathered in front of the front surface 30f of the swinging substrate 30 can be taken in through the front end opening. The rear end opening side of the front portion 76x is provided so as to protrude rearward from the rear surface 30x of the swing substrate 30. The rear end opening of the front portion 76x and the front end opening of the main portion 76y are connected so as to communicate with each other. The main portion 76y is provided so as to penetrate the mud pipe holding through hole 14 of the guide member 31, and the rear end opening of the main portion 76y and the suction port of the pump 76b for mud are connected so as to communicate with each other. And the discharge port of the pump 76b for mud and the mud tank 76a are connected so that communication is possible by a connecting pipe outside the figure. Two systems of the mud discharge device 76 are provided on the left and right sides inside the lower portion of the top pipe 6. It should be noted that the front end opening of the front portion 76x is positioned on the inner surface side of the front pipe 6 so that the sludge pipe 76c does not contact the left and right inner surfaces of the front pipe 6 when the swing substrate 30 swings. The rear end opening is provided so as to be located on the center side of the leading pipe 6. In other words, the front portion 76x is provided so that the center line of the tube extends from the inner side surface 6a; 6b side of the leading tube 6 to the central side of the leading tube 6 while being inclined.

尚、水貯留タンク７５ａ及び排泥タンク７６ａは、例えば水貯留タンク７５ａと排泥タンク７６ａとが一体となった集合タンク７５Ｘにより構成される。即ち、集合タンク７５Ｘの内部に仕切体７５ｗを設けて集合タンク７５Ｘの内部を２つの領域に区切り、一方の領域を水貯留タンク７５ａとして使用し、他方の領域を排泥タンク７６ａとして使用する。
つまり、最初に一定量の水を集合タンク７５Ｘ内に満たしておき、送水用のポンプ７５ｂを駆動して揺動基板３０の前方に水を圧送すると、揺動基板３０の前方に圧送された水と回転掘削体４６；４６により掘削された土砂とが混ざって泥水となる。そして、排泥用のポンプ７６ｂを駆動することにより、揺動基板３０の前方の泥水が排泥タンク７６ａに排出される。排泥タンク７６ａに排出された泥水中の泥が排泥タンク７６ａの底に沈殿するとともに、仕切体７５ｗを越えて水貯留タンク７５ａに入り込んだ泥水が再び送水用のポンプ７５ｂによって揺動基板３０の前方に圧送される。即ち、泥水を循環させて揺動基板３０の前方に供給できるようになるので、水の使用量を減らすことができる。また、水よりも比重が大きい泥水を揺動基板３０の前方に供給できるので、地盤及び地下水の圧力に抵抗できて、地盤及び地下水の圧力と揺動基板３０の前方に供給した圧力とを均等にしやすくなるので、地盤沈下等、地中１０に与える影響を少なくすることができる。また、揺動基板３０の前方が泥水化するので、排泥をスムーズに行えるようになり、掘削しやすくなる。
尚、最初から泥水を集合タンク７５Ｘ内に満たしておき、送水用のポンプ７５ｂを駆動して揺動基板３０の前方と集合タンク７５Ｘ内との間で泥水を循環させてもよい。 In addition, the water storage tank 75a and the waste mud tank 76a are comprised by the collection tank 75X which the water storage tank 75a and the waste mud tank 76a integrated, for example. That is, the partition 75w is provided inside the collective tank 75X to divide the collective tank 75X into two regions, one region is used as the water storage tank 75a, and the other region is used as the mud tank 76a.
That is, when a certain amount of water is initially filled in the collecting tank 75X, and the water pump 75b is driven to pump water forward of the swing substrate 30, the water pumped forward of the swing substrate 30 is supplied. And the earth and sand excavated by the rotary excavator 46; 46 are mixed to form muddy water. Then, the mud water in front of the swing substrate 30 is discharged to the mud tank 76a by driving the mud pump 76b. Mud in the mud discharged to the waste mud tank 76a settles on the bottom of the waste mud tank 76a, and the mud that has entered the water storage tank 75a beyond the partition 75w is again fed by the pump 75b for water supply by the swing substrate 30. It is pumped forward. That is, since the muddy water can be circulated and supplied to the front of the rocking substrate 30, the amount of water used can be reduced. Further, since muddy water having a specific gravity greater than that of water can be supplied to the front of the rocking substrate 30, it can resist the pressure of the ground and groundwater, and the pressure of the ground and groundwater and the pressure supplied to the front of the rocking substrate 30 are equal. Therefore, the influence on the underground 10 such as land subsidence can be reduced. Moreover, since the front of the rocking substrate 30 becomes muddy water, the mud can be drained smoothly and excavation is facilitated.
The muddy water may be filled in the collecting tank 75X from the beginning, and the muddy water may be circulated between the front of the oscillating substrate 30 and the collecting tank 75X by driving the water supply pump 75b.

次に管設置装置１による地中１０への管２の設置方法を説明する。
掘削機械２６と、掘削機械揺動駆動装置２５と、左右の推進力伝達棒状体７１Ａ；７１Ｂと、水供給管７５ｃと、排泥管７６ｃとが組立てられた組立体を、掘削回転体４６側から先頭管６の後端開口を介して先頭管６内に入れていき、案内部材３１の前端面３１ａと先頭管６の内側に固定された推進力受け部６３とを接触させる。そして、先頭管６の後端面１０２ｅより後方に突出する左右の推進力伝達棒状体７１Ａ；７１Ｂの他端間に跨るように当て材７２を設置して当て材７２を左右の推進力伝達棒状体７１Ａ；７１Ｂの他端に図外のボルトや万力装置などで連結する。そして、送水用のポンプ７５ｂを駆動して揺動基板３０の前方に泥水を供給し、揺動基板３０の前方と集合タンク７５Ｘ内との間で泥水を循環させるとともに、制御装置６５による制御によって、油圧源５５から油圧モータ４７に圧油を供給して回転掘削体４６を回転させながら、推進駆動源６１を作動させて当て材７２に推進力を加えることで、推進力が、推進力伝達棒状体７１、案内部材３１、推進力受け部６３を介して先頭管６及び回転掘削体４６；４６に伝達され、先頭管６が前方に推進するとともに回転掘削体４６；４６が前方に推進する。この際、揺動基板駆動用ジャッキ１６を作動させて揺動基板３０の左右壁３０ａ；３０ｂ側を前後に揺動させることで、掘削回転体４６が先頭管６の左右方向に首振りのように揺動して地山９９を掘削する。これにより、先頭管６の前方において先頭管６の左右幅間隔よりも広い左右間隔幅で地山９９が掘削されるので、先頭管６が推進する際に先頭管６の先端が硬質地盤の地山９９に衝突する可能性が少なくなり、先頭管６をスムーズに推進させることができる。
先頭管６の後端面１０２ｅを残して先頭管６が地中１０に設置された後、先頭管６の後端面１０２ｅに後続管７を溶接、又は、ボルト等の固定具により接続し、さらに、先頭の推進力伝達棒状体７１の他端と後続の推進力伝達棒状体７１の一端とをボルト、又は、溶接により結合することにより、先頭の推進力伝達棒状体７１の後ろに後続の推進力伝達棒状体７１を継ぎ足すとともに、また、耐圧ホース５６の他端に図外の延長耐圧ホースを継ぎ足し、水供給管７５ｃの他端に図外の延長水供給管を継ぎ足し、排泥管７６ｃの他端に図外の延長排泥管を継ぎ足していく。そして、当て材７２を、後続管７の後端縁より後方に突出する左右の推進力伝達棒状体７１Ａ；７１Ｂの他端間に跨るように設置して、当て材７２を油圧ジャッキ６１Ａのピストンロッド６１ａで押圧しながら、回転掘削体４６；４６を回転駆動させることにより、回転掘削体４６が掘削を行いながら先頭管６が推進し、後続管７が地中に設置される。
以後、同様に、前の後続管７の後端縁に後の後続管７を順次連結して地中１０に設置していくことで、支保工１１を構築できる。 Next, the installation method of the pipe | tube 2 to the underground 10 by the pipe installation apparatus 1 is demonstrated.
The assembly in which the excavating machine 26, the excavating machine swing drive device 25, the left and right propulsive force transmission rods 71A and 71B, the water supply pipe 75c, and the drainage pipe 76c are assembled is connected to the excavation rotating body 46 side. Then, the lead pipe 6 is inserted into the lead pipe 6 through the rear end opening of the lead pipe 6, and the front end face 31 a of the guide member 31 is brought into contact with the propulsive force receiving portion 63 fixed inside the lead pipe 6. And the abutting material 72 is installed so as to straddle between the other ends of the left and right propulsive force transmission rod-like bodies 71A; 71A; It connects with the other end of 71B with a volt | bolt outside a figure, a vise, etc. Then, the water supply pump 75b is driven to supply muddy water to the front of the oscillating substrate 30, and the muddy water is circulated between the front of the oscillating substrate 30 and the inside of the collecting tank 75X. The propulsive force is transmitted by transmitting the propulsive force by operating the propulsion drive source 61 and applying the propulsive force to the abutting member 72 while supplying the hydraulic oil from the hydraulic source 55 to the hydraulic motor 47 and rotating the rotary excavator 46. It is transmitted to the leading pipe 6 and the rotary excavation body 46; 46 through the rod-shaped body 71, the guide member 31, and the propulsion force receiving portion 63, and the leading pipe 6 propels forward and the rotary excavation body 46; 46 propels forward. . At this time, the excavation rotating body 46 swings in the left-right direction of the top pipe 6 by operating the swing board driving jack 16 to swing the left and right walls 30a; 30b of the swing board 30 back and forth. Rocks and excavates natural ground 99. As a result, the ground 99 is excavated with a width between the left and right widths wider than the left and right width of the top pipe 6 in front of the top pipe 6, so that when the top pipe 6 is propelled, the tip of the top pipe 6 is hard ground. The possibility of colliding with the mountain 99 is reduced, and the leading pipe 6 can be smoothly promoted.
After the leading pipe 6 is installed in the ground 10 leaving the rear end face 102e of the leading pipe 6, the succeeding pipe 7 is connected to the rear end face 102e of the leading pipe 6 by welding or a fixture such as a bolt, By connecting the other end of the leading thrust transmission rod 71 and one end of the trailing thrust transmission rod 71 by bolts or welding, the following thrust is placed behind the leading thrust transmission rod 71. In addition to adding the transmission rod-like body 71, an extension pressure hose (not shown) is added to the other end of the pressure hose 56, and an extension water supply pipe (not shown) is added to the other end of the water supply pipe 75c. An extended sludge pipe (not shown) is added to the other end. Then, the abutting member 72 is installed so as to straddle between the other ends of the left and right propulsive force transmitting rod-like bodies 71A; 71B projecting rearward from the rear end edge of the succeeding pipe 7, and the abutting member 72 is disposed on the piston of the hydraulic jack 61A. By rotating and driving the rotary excavator 46; 46 while being pressed by the rod 61a, the leading pipe 6 is propelled while the rotary excavator 46 excavates, and the subsequent pipe 7 is installed in the ground.
Thereafter, similarly, the support work 11 can be constructed by sequentially connecting the subsequent succeeding pipe 7 to the rear end edge of the preceding succeeding pipe 7 and installing it in the ground 10.

支保工１１を構築した後は、掘削始点となった出発側の空洞部１００内に掘削機械２６等を引き戻して回収する。実施形態１によれば、推進力伝達棒状体７１を継ぎ足していくことから、掘削機械２６等を回収する際には、最後尾の推進力伝達棒状体７１側から推進力伝達棒状体７１の１個長さ分ずつ空洞部１００内に引き戻して、最後尾側から先頭まで順番に推進力伝達棒状体７１を取り外していくことにより、掘削機械２６等を容易に回収できるようになる。この場合、推進装置の一例である油圧ジャッキ６１Ａを掘削始点となる空洞部１００内にのみ設置すればよいので、装置コストを低減できる。
尚、到達側の空洞部１００内に掘削機械２６等を押し出して回収するようしてもよい。
例えば、先頭管６を到達側の空洞部１００に押し出して推進力受け部６３を除去してから、到達側の空洞部１００内に掘削機械２６等を押し出して回収する。この場合、掘削機械２６等を掘削始点となった空洞部１００内に引き戻す作業よりも掘削機械２６等を到達側の空洞部１００内に押し出す作業の方が容易となるので、掘削機械２６等の回収作業が容易となる。
図８（ｂ）のように、地中１０に形成された１つの空洞部１００から出発して当該空洞部１００に戻るように支保工１１を構築する場合には、掘削機械２６等が１つの空洞部１００の到達口に到達したならば掘削機械２６等を到達口から当該空洞部１００内に押し出すようにして回収すれば、掘削機械２６等の回収作業が容易となるとともに、油圧ジャッキ６１Ａを当該１つの空洞部１００内にのみ設置すればよいので装置コストも低減できる。 After the support work 11 is constructed, the excavating machine 26 and the like are pulled back into the cavity 100 on the starting side that is the starting point of excavation and collected. According to the first embodiment, since the propulsive force transmission rod-shaped body 71 is added, when the excavating machine 26 and the like are collected, the propulsive force transmission rod-shaped body 71 1 is selected from the rearmost propulsive force transmission rod-shaped body 71 side. The excavating machine 26 and the like can be easily collected by pulling back into the cavity 100 by the length of each piece and detaching the propulsive force transmission rod-like body 71 in order from the last side to the top. In this case, the hydraulic jack 61A, which is an example of the propulsion device, needs to be installed only in the hollow portion 100 serving as the excavation start point, so that the device cost can be reduced.
Note that the excavating machine 26 and the like may be pushed into the cavity 100 on the reaching side and recovered.
For example, the leading pipe 6 is pushed out to the reaching-side cavity 100 to remove the propulsive force receiving portion 63, and then the excavating machine 26 and the like are pushed into the reaching-side cavity 100 and collected. In this case, the operation of pushing the excavating machine 26 and the like into the cavity 100 on the arrival side is easier than the operation of pulling the excavating machine 26 and the like back into the cavity 100 that is the starting point of excavation. Collection work becomes easy.
As shown in FIG. 8B, when the support work 11 is constructed so as to start from one cavity 100 formed in the ground 10 and return to the cavity 100, the excavating machine 26 and the like are one. If the excavating machine 26 or the like is recovered by pushing it out of the reaching port into the cavity 100 when the arrival port of the hollow part 100 is reached, the recovery operation of the excavating machine 26 or the like is facilitated and the hydraulic jack 61A is installed. Since it suffices to install only in one cavity 100, the apparatus cost can be reduced.

実施形態１によれば、掘削機械揺動駆動装置２５を備えるので、回転掘削体４６の回転中心線Ｌが推進方向と直交する面と平行な状態から推進方向と直交する面に対して傾く状態にできて回転掘削体４６を左右に揺動させることができるので、回転掘削体４６による左右方向の掘削幅が大きくなり、左右の余堀量を多くできて、先頭管６の前方の硬質層を掘削できるので、地山９９が硬質地盤である場合でも先頭管６を地中１０においてスムーズに推進させることができる。
また、揺動基板３０の後面３０ｘと案内部材３１の筒部３１ｘと案内部材３１の底部３１ｙの前面３１ｆとで囲まれた空間７８内に、水よりも粘性の高い液体としてのグリス８８を封入したので、揺動基板３０の後方側の先頭管６内への泥水の流入を防止できる。よって、揺動基板３０の前面側に位置する泥水を排泥装置７６により確実に排泥できるようになり、周辺の地下水の水位低下も抑制でき、さらに、揺動基板３０の揺動動作もスムーズとなる。 According to the first embodiment, since the excavating machine swing drive device 25 is provided, the rotation center line L of the rotary excavating body 46 is inclined with respect to the plane orthogonal to the propulsion direction from the state parallel to the plane orthogonal to the propulsion direction. Since the rotary excavator 46 can be swung to the left and right, the horizontal excavation width by the rotary excavator 46 can be increased, the amount of left and right extra excavations can be increased, and the hard layer in front of the top pipe 6 can be increased. Therefore, even when the natural ground 99 is hard ground, the leading pipe 6 can be smoothly promoted in the underground 10.
Further, grease 88 as a liquid having a higher viscosity than water is enclosed in a space 78 surrounded by the rear surface 30x of the swing substrate 30, the cylindrical portion 31x of the guide member 31, and the front surface 31f of the bottom portion 31y of the guide member 31. Therefore, the inflow of muddy water into the leading pipe 6 on the rear side of the swing substrate 30 can be prevented. Therefore, the mud located on the front side of the rocking substrate 30 can be surely drained by the mud discharging device 76, the lowering of the groundwater level in the surroundings can be suppressed, and the rocking operation of the rocking substrate 30 is also smooth. It becomes.

実施形態２
グリッパ装置を用いて先頭管６を推進させるようにしてもよい。この場合、グリッパ装置は、例えば、案内部材３１の筒の後端部に固定されて後方に延長するように設けられた図外の複数のジャッキ支持体と、ジャッキのシリンダがジャッキ支持体に固定されてジャッキのピストンが伸長することで先頭管５の内面に突っ張るように接触する複数のジャッキとを備えて構成される。
複数のジャッキのピストンを伸長させて先頭管の内面に突っ張るように作動させた後、先頭管の後端面を推進ジャッキで押圧して先頭管を推進させた場合、先頭管６と、掘削機械揺動駆動装置２５と、掘削機械２６とを一緒に推進させることができ、推進力伝達手段６２と推進力受け部６３とを不要とできる。このため、掘削機械２６等を到達側で回収できるようになる。
また、地山９９側から揺動基板３０に加わる水圧に十分に対抗できるようになる。 Embodiment 2
The leading pipe 6 may be propelled using a gripper device. In this case, for example, the gripper device is fixed to the rear end portion of the cylinder of the guide member 31 and is provided with a plurality of jack supports (not shown) provided to extend rearward, and the jack cylinder is fixed to the jack support. The jack piston is extended to have a plurality of jacks that come into contact with the inner surface of the leading pipe 5 so as to stretch.
When the pistons of a plurality of jacks are extended so as to be pushed against the inner surface of the leading pipe, and the leading pipe is pushed by pushing the rear end surface of the leading pipe with a propulsion jack, the leading pipe 6 and the excavating machine are shaken. The dynamic drive device 25 and the excavating machine 26 can be propelled together, and the propulsive force transmitting means 62 and the propulsive force receiving portion 63 can be dispensed with. For this reason, the excavating machine 26 and the like can be collected on the arrival side.
In addition, it is possible to sufficiently resist the water pressure applied to the rocking substrate 30 from the ground 99 side.

実施形態３
図９乃至図１１に示すように、回転掘削体は、回転体５０の外周面５１より突出するように設けられた掘削刃としての第１の掘削ビット８０及び第２の掘削ビット８１とを備えた構成の回転掘削体４６Ａを用いてもよい。
複数個の第２の掘削ビット８１が回転体５０の回転中心線Ｌに沿った方向に並べられて第２の掘削ビット群８１０が構成される。
回転体５０の外周面５１には複数のビット取付部８３が点在するように設けられる。第１の掘削ビット８０は、回転体５０の外周面５１に設けられた個々のビット取付部８３に１つ１つ個別に着脱可能に取り付けられる。第２の掘削ビット８１は、回転体５０の外周面に設けられた複数のビット取付部８３に着脱可能に取り付けられるビット設置板８４に設けられる。即ち、第２の掘削ビット群８１０は、ビット取付部８３に取り付けられて回転体５０の回転中心線Ｌに沿って回転体５０の外周面５１の周面幅（回転中心線Ｌに沿った方向の幅、即ち、回転体５０の回転中心線Ｌに沿った方向の両方の端面）に渡って延長するビット設置板８４のビット設置面８４ａに、複数の第２の掘削ビット８１が回転中心線Ｌに沿った方向に並ぶように着脱可能又は固定的に設けられた構成である。
１つの１つの回転掘削体４６Ａにおいて、第１の掘削ビット８０は、回転体５０の外周面５１の周方向に互いに１８０°離れた位置にそれぞれ設けられる。第２の掘削ビット群８１０は、回転体５０の外周面５１上において第１の掘削ビット８０が設けられていない部分に設けられる。
図１０（ｂ）に示すように、回転体５０の外周面５１上で周方向に互いに１８０°離れた位置に設けられた各第２の掘削ビット群８１０；８１０の各掘削ビット８１の先端は、回転体５０の回転中心線Ｌと直交する同一の面８５上に位置しないように設定されている。つまり、一方の第２の掘削ビット群８１０において互いに隣り合う各掘削ビット８１間で掘削されない地盤部分を他方の第２の掘削ビット群８１０の各掘削ビット８１で掘削できるように構成されている。要するに、１つの１つの回転掘削体４６Ａは、一方の第２の掘削ビット群８１０で掘削できない地盤部分を他方の第２の掘削ビット群８１０で掘削できるようにした相補的な一対の第２の掘削ビット群８１０；８１０を備えた構成である。
そして、図１１（ａ）に示すように、回転体５０の回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第１の掘削ビット８０の先端までの第１距離８０ｘ（即ち、第１の掘削ビット８０による掘削半径）と回転体５０の回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第２の掘削ビット８１の先端までの第２距離８１ｘ（即ち、第２の掘削ビットによる掘削半径）とが異なる。
つまり、第１距離８０ｘを掘削半径とした第１の掘削ビット８０による掘削径が、先頭管６の上下の内壁面６ｃ；６ｄ間（先頭管６の一方の一対の壁面の内壁面間）の寸法９ｘよりも小さく設定され、かつ、第２距離８１ｘを掘削半径とした第２の掘削ビット８１による掘削径が、先頭管６の先頭管６の上下の内壁面６ｃ；６ｄ間の寸法９ｘよりも大きく設定されていることにより、回転掘削体４６Ａが先頭管６の先頭開口６ｔを介して先頭管６の前方及び先頭管６の内側に移動可能に構成されている。
即ち、第１距離８０ｘは、回転掘削体４６Ａが先頭管６の内側で回転中心線Ｌを回転中心として回転可能な回転半径寸法に設定されたことによって、回転掘削体４６Ａが管２内を通過可能となり、掘削機械２６を出発側の空洞部１００に引き戻して回収できる。
また、第２距離８１ｘは、回転掘削体４６Ａが先頭管６の内側で回転中心線Ｌを回転中心として回転不可能で、かつ、回転掘削体４６Ａが先頭管６の先頭開口６ｔの前方に位置された場合に回転可能な回転半径に設定される。
即ち、回転掘削体４６Ａが先頭管６の先頭開口６ｔの前方に位置された状態で回転駆動されることによって第１の掘削ビット８０及び第２の掘削ビット８１が先頭管６の先頭開口６ｔの前方位置の地盤を掘削可能であり、かつ、回転掘削体４６Ａが管２（先頭管６及び後続管７）内を通過して管２を出発させた空洞部１００に回収可能に構成される。
以上のような回転掘削体４６Ａを備えたことにより、先頭管６の先頭開口６ｔの前方において先頭開口６ｔの断面よりも上下幅の大きい断面積の孔を掘削できるので、先頭管６の先頭開口縁６ｚが地盤に衝突する前に地盤を掘削できて、管２をよりスムーズに推進させることができる。
また、掘削機械２６の回収時には、図１１（ｂ）に示すように、第２の掘削ビット群８１０の第２の掘削ビット８１の先端が、先頭管６の上下の内壁面６ｃ；６ｄと同一平面を示す位置より上方に位置しない状態にしてから、回転掘削体４６Ａを管２内に引き戻して掘削機械２６を出発側の空洞部１００に回収する。 Embodiment 3
As shown in FIGS. 9 to 11, the rotary excavation body includes a first excavation bit 80 and a second excavation bit 81 as excavation blades provided so as to protrude from the outer peripheral surface 51 of the rotation body 50. A rotary excavator 46A having the above-described configuration may be used.
A plurality of second excavation bits 81 are arranged in a direction along the rotation center line L of the rotating body 50 to constitute a second excavation bit group 810.
A plurality of bit attachment portions 83 are provided on the outer peripheral surface 51 of the rotating body 50 so as to be scattered. The first excavation bits 80 are individually detachably attached to individual bit attachment portions 83 provided on the outer peripheral surface 51 of the rotating body 50. The 2nd excavation bit 81 is provided in the bit installation board 84 attached to the some bit attachment part 83 provided in the outer peripheral surface of the rotary body 50 so that attachment or detachment is possible. That is, the second excavation bit group 810 is attached to the bit attachment portion 83 and along the rotation center line L of the rotating body 50, the circumferential width of the outer peripheral surface 51 of the rotating body 50 (the direction along the rotation center line L). The plurality of second excavation bits 81 on the bit installation surface 84a of the bit installation plate 84 extending across the width of the rotation body 50, that is, both end surfaces in the direction along the rotation center line L of the rotating body 50). It is a configuration that is detachably or fixedly provided so as to be aligned in a direction along L.
In one rotating excavation body 46A, the first excavation bits 80 are provided at positions 180 degrees apart from each other in the circumferential direction of the outer peripheral surface 51 of the rotating body 50. The second excavation bit group 810 is provided on the outer peripheral surface 51 of the rotating body 50 at a portion where the first excavation bit 80 is not provided.
As shown in FIG. 10 (b), the tips of the respective excavation bits 81 of the second excavation bit groups 810; 810 provided at positions 180 ° apart from each other on the outer peripheral surface 51 of the rotating body 50 are The rotation body 50 is set so as not to be located on the same plane 85 orthogonal to the rotation center line L. That is, the ground portion that is not excavated between the adjacent excavation bits 81 in one second excavation bit group 810 can be excavated by the excavation bits 81 of the other second excavation bit group 810. In short, one single rotary excavation body 46 </ b> A has a pair of complementary second second holes that enable excavation of a ground portion that cannot be excavated by one second excavation bit group 810 using the other second excavation bit group 810. It is the structure provided with the excavation bit group 810; 810.
Then, as shown in FIG. 11A, a first distance 80x (that is, the first distance) from the rotation center line L of the rotating body 50 to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. A second radius 81x (that is, a second radius 81x) from the rotation center line L of the rotating body 50 to the tip of the second drill bit 81 via a line orthogonal to the rotation center line L. The excavation radius by the excavation bit is different.
That is, the excavation diameter by the first excavation bit 80 with the first distance 80x as the excavation radius is between the upper and lower inner wall surfaces 6c; 6d of the leading pipe 6 (between the inner wall surfaces of one pair of wall surfaces of the leading pipe 6). The diameter of excavation by the second excavation bit 81, which is set smaller than the dimension 9x and has the second distance 81x as the excavation radius, is based on the dimension 9x between the upper and lower inner wall surfaces 6c; In addition, the rotary excavator 46A is configured to be movable forward of the leading pipe 6 and inside the leading pipe 6 through the leading opening 6t of the leading pipe 6.
That is, the first excavation body 46A passes through the pipe 2 because the rotary excavation body 46A is set to have a rotation radius dimension that allows the rotation excavation body 46A to rotate around the rotation center line L inside the leading pipe 6. It becomes possible, and the excavating machine 26 can be pulled back into the cavity 100 on the starting side and collected.
The second distance 81x is such that the rotary excavator 46A cannot rotate around the rotation center line L inside the head pipe 6 and the rotary excavator 46A is positioned in front of the head opening 6t of the head pipe 6. When set, the rotation radius is set to be rotatable.
That is, the first excavation bit 80 and the second excavation bit 81 are positioned in the front opening 6t of the front pipe 6 by being driven to rotate while the rotary excavation body 46A is positioned in front of the front opening 6t of the front pipe 6. The ground at the front position can be excavated, and the rotary excavator 46A passes through the pipe 2 (the leading pipe 6 and the succeeding pipe 7) and can be recovered in the cavity 100 from which the pipe 2 has started.
By providing the rotary excavating body 46A as described above, a hole having a cross-sectional area larger than the cross section of the top opening 6t in front of the top opening 6t of the top pipe 6 can be excavated. The ground can be excavated before the edge 6z collides with the ground, and the pipe 2 can be pushed more smoothly.
At the time of recovery of the excavating machine 26, as shown in FIG. 11B, the tip of the second excavating bit 81 of the second excavating bit group 810 is the same as the upper and lower inner wall surfaces 6c; After the state where it is not located above the position indicating the plane, the rotary excavator 46A is pulled back into the pipe 2 and the excavating machine 26 is recovered in the cavity 100 on the starting side.

即ち、実施形態３によれば、回転体５０の回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第１の掘削ビット８０の先端までの第１距離８０ｘ（即ち、第１の掘削ビット８０による掘削半径）と回転体５０の回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第２の掘削ビット８１の先端までの第２距離８１ｘ（即ち、第２の掘削ビットによる掘削半径）とが異なるように設定され、第１距離８０ｘを掘削半径とした第１の掘削ビット８０による掘削径が、先頭管６の案内刃管の上下の内壁面６ｃ；６ｄ間の寸法９ｘよりも小さく、第２距離８１ｘを掘削半径とした第２の掘削ビット８１による掘削径が、先頭管６の上下の内壁面６ｃ；６ｄ間の寸法９ｘよりも大きく設定された回転掘削体４６Ａを備えた。このため、先頭管６の先頭開口６ｔより前方に位置する回転掘削体４６Ａを回転させて掘削ビット８０；８１が地盤を掘削することにより、先頭管６の先頭開口６ｔの前方において、先頭管６の管の中心を中心とした四角断面であって先頭管６の先頭開口６ｔの四角断面の幅寸法（回転掘削体４６Ａの径方向に対応する幅寸法、例えば、先頭管６の上下の内壁面６ｃ；６ｄ間の寸法９ｘ）より幅寸法の大きい四角断面の孔を掘削できる。よって、先頭管６の先頭開口縁６ｚが地盤に衝突する前に、先頭管６の先頭開口６ｔよりも前方に位置する地盤を掘削ビット８０；８１により確実に掘削できるので、先頭管６の先頭開口縁６ｚが硬質の地盤に衝突して先頭管６を推進できなくなるような事態を防止でき、地山９９が硬質地盤である場合でも、管２をよりスムーズに推進させることができる。
また、掘削機械揺動駆動装置２５を備えたので、回転掘削体４６Ａによる左右方向の掘削幅が大きくなり、左右の余堀量を多くできるとともに、第２の掘削ビット群８１０を備えたので、第２の掘削ビット８１による掘削によって、先頭管６の前方において先頭管６の上下の内壁面６ｃ；６ｄ（先頭管６の一方の一対の壁面）と直交する方向である先頭管６の上下幅間隔よりも広い上下幅間隔で地山９９を掘削できるようになり、先頭管６の前方において先頭管６の上下幅方向での余堀が可能となるので、地山９９が硬質地盤である場合でも管をよりスムーズに推進させることが可能となる。
また、第１の掘削ビット８０による掘削径が先頭管６の上下の内壁面６ｃ；６ｄ間の寸法９ｘよりも小さいので、掘削機械２６等の回収時には、図１１（ｂ）に示すように、回転掘削体４６Ａが管２内を通過できるようになるので、回転掘削体４６Ａを管２内に通して引き戻すことにより掘削機械２６等を出発側の空洞部１００に回収できる。 That is, according to the third embodiment, the first distance 80x (that is, the first excavation) from the rotation center line L of the rotating body 50 to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. The second radius 81x (that is, depending on the second excavation bit) from the rotation center line L of the rotating body 50 to the tip of the second excavation bit 81 via a line orthogonal to the rotation center line L. The excavation diameter by the first excavation bit 80 with the first distance 80x as the excavation radius is the dimension 9x between the upper and lower inner wall surfaces 6c; A rotary excavator 46A having a drilling diameter of the second drilling bit 81 having a second drilling radius of the second distance 81x is set to be larger than the upper and lower inner wall surfaces 6c; Prepared. For this reason, by rotating the rotary excavating body 46A located in front of the top opening 6t of the top pipe 6 and excavating bits 80; 81 excavating the ground, the top pipe 6 is positioned in front of the top opening 6t of the top pipe 6. The width of the square section of the leading opening 6t of the leading pipe 6 (the width dimension corresponding to the radial direction of the rotary excavator 46A, for example, the upper and lower inner wall surfaces of the leading pipe 6) It is possible to excavate a hole with a square cross section having a width dimension larger than the dimension 9x) between 6c and 6d. Therefore, before the top opening edge 6z of the top pipe 6 collides with the ground, the ground positioned in front of the top opening 6t of the top pipe 6 can be reliably excavated by the excavation bits 80; 81. It is possible to prevent a situation in which the opening edge 6z collides with the hard ground and the front pipe 6 cannot be pushed, and the pipe 2 can be pushed more smoothly even when the ground 99 is hard ground.
Moreover, since the excavating machine swing drive device 25 is provided, the excavation width in the left-right direction by the rotary excavator 46A is increased, the amount of left and right surplus can be increased, and the second excavation bit group 810 is provided. Due to excavation by the second excavation bit 81, the top and bottom widths of the top tube 6 in the direction perpendicular to the top and bottom inner wall surfaces 6c; 6d (one pair of wall surfaces of the top tube 6) in front of the top tube 6 When the natural ground 99 can be excavated in the vertical width direction of the top pipe 6 in front of the top pipe 6 and the ground 99 can be excavated at a vertical width interval wider than the interval. However, it is possible to propel the tube more smoothly.
In addition, since the excavation diameter by the first excavation bit 80 is smaller than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the top pipe 6, when collecting the excavating machine 26 and the like, as shown in FIG. Since the rotary excavator 46A can pass through the pipe 2, the excavating machine 26 and the like can be collected in the cavity 100 on the starting side by pulling the rotary excavator 46A through the pipe 2 and pulling it back.

また、回転体５０の外周面５１上で周方向に互いに１８０°離れた位置に設けられた各第２の掘削ビット群８１０；８１０の各掘削ビット８１の先端位置が、回転体５０の回転中心線Ｌと直交する同一の面８５上に位置しないように設定されている。つまり、回転体５０の外周面５１上で周方向に互いに１８０°離れた位置に設けられた一対の第２の掘削ビット群８１０；８１０は、回転掘削体４６Ａの回転により一方の第２の掘削ビット群８１０で掘削できない地盤部分を他方の第２の掘削ビット群８１０で掘削できるように構成されているので、先頭管６の先頭開口６ｔの四角断面の幅寸法より幅寸法の大きい四角断面の孔を効率的に掘削でき、管２をよりスムーズに推進させることができる。   The tip positions of the respective excavation bits 81 of the second excavation bit groups 810 and 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the rotator 50 are the rotation centers of the rotator 50. It is set so as not to be located on the same surface 85 orthogonal to the line L. In other words, the pair of second excavation bit groups 810; 810 provided at positions 180 ° apart from each other in the circumferential direction on the outer peripheral surface 51 of the rotating body 50 is rotated by one rotation of the rotating excavating body 46A. Since the ground portion that cannot be excavated by the bit group 810 can be excavated by the other second excavation bit group 810, a square section having a larger width dimension than the width dimension of the square section of the leading opening 6t of the leading pipe 6 is used. A hole can be excavated efficiently and the pipe 2 can be propelled more smoothly.

また、各第２の掘削ビット群８１０を、回転中心線Ｌを中心として回転体５０の外周面５１上で例えば等間隔に配置することで、回転掘削体４６Ａの回転重心を一定に保てるようになり、回転掘削体４６Ａの回転がスムーズになって効率的に掘削できて、管２をよりスムーズに推進させることができる。
また、第２の掘削ビット８１及び第１の掘削ビット８０を備えたので、第２距離８１ｘを掘削半径とした掘削径の孔を第２の掘削ビット８１及び第１の掘削ビット８０によってより効率的に掘削できるようになる。 Further, by arranging the second excavation bit groups 810, for example, at equal intervals on the outer peripheral surface 51 of the rotary body 50 with the rotation center line L as the center, the rotational center of gravity of the rotary excavation body 46A can be kept constant. Thus, the rotation of the rotary excavator 46A becomes smooth and can be excavated efficiently, and the pipe 2 can be propelled more smoothly.
Further, since the second excavation bit 81 and the first excavation bit 80 are provided, the second excavation bit 81 and the first excavation bit 80 can make the hole having the excavation diameter with the second distance 81x as the excavation radius more efficient. Can be excavated.

尚、第２の掘削ビット群８１０は、回転体５０の外周面５１に設けられた個々の取付部８３に個々に取付けられた第２の掘削ビット８１の集合体により構成されてもよい。   The second excavation bit group 810 may be configured by an aggregate of second excavation bits 81 individually attached to individual attachment portions 83 provided on the outer peripheral surface 51 of the rotating body 50.

また、回転体５０の外周面５１上において回転体５０の回転中心線Ｌに沿った方向の両方の端面に跨って回転中心線Ｌに沿った方向に直線状又は非直線状に個々の第２の掘削ビット８１が個々に並ぶように配置されていたり、回転体５０の外周面５１上において回転体５０の回転中心線Ｌに沿った方向の両方の端面に跨って回転中心線Ｌに沿った方向に直線状又は非直線状に延長する１つの掘削刃を有した第２の掘削ビットを備えた構成の回転掘削体４６Ａであって、回転掘削体４６Ａが管２の内側で回転中心線Ｌを中心として回転不可能で、かつ、先頭管６の先頭開口６ｔの前方位置で回転可能なように構成されていればよい。   In addition, on the outer peripheral surface 51 of the rotator 50, the individual second linearly or non-linearly in the direction along the rotation center line L across both end faces in the direction along the rotation center line L of the rotator 50. The excavation bits 81 are arranged so as to be lined up individually, or along the rotation center line L across both end surfaces in the direction along the rotation center line L of the rotating body 50 on the outer peripheral surface 51 of the rotating body 50. Rotating excavator 46A having a second excavating bit having one excavating blade extending linearly or non-linearly in the direction, the rotating excavator 46A being inside the pipe 2 and rotating centerline L It is only necessary to be configured so that it is not rotatable around the center of the head tube 6 and is rotatable at a position in front of the head opening 6t of the head tube 6.

第２の掘削ビット群８１０；８１０が回転体５０の外周面５１上で周方向に互いに１８０°離れた位置に設けられていなくてもよい。
要するに、回転掘削体４６Ａは、回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第１の掘削ビット８０の先端までの第１距離８０ｘが、回転掘削体４６Ａが管６の内側で回転中心線Ｌを中心として回転可能な回転半径に設定され、回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第２の掘削ビット８１の先端までの第２距離８１ｘが、回転掘削体４６Ａが管２の内側で回転中心線Ｌを中心として回転不可能で、かつ、回転掘削体４６Ａが先頭管６の先頭開口６ｔの前方に位置された場合に回転中心線Ｌを中心として回転可能な回転半径に設定されればよい。 The second excavation bit groups 810; 810 may not be provided at positions 180 degrees apart from each other on the outer peripheral surface 51 of the rotating body 50 in the circumferential direction.
In short, the rotary excavator 46A has a first distance 80x from the rotation center line L to the tip of the first excavation bit 80 via a line orthogonal to the rotation center line L. A rotation radius that is rotatable about the rotation center line L is set, and a second distance 81x from the rotation center line L to the tip of the second excavation bit 81 via a line orthogonal to the rotation center line L is the rotation excavation. When the body 46A cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavation body 46A is positioned in front of the top opening 6t of the top pipe 6, the body 46A rotates around the rotation center line L. What is necessary is just to set to the possible rotation radius.

実施形態４
回転掘削体は、第１の掘削ビット８０を備えない構成としてもよい。即ち、掘削ビットとして第２の掘削ビット８１のみを有した回転掘削体を用いてもよい。
要するに、回転掘削体が第１の掘削ビット８０を備えない構成の場合において、回転中心線Ｌから回転中心線Ｌと直交する線上を経由した回転掘削体の回転体５０の外周面５１までの最短距離である第１距離が、回転掘削体が管６の内側で回転中心線Ｌを中心として回転可能な回転半径に設定され、回転中心線Ｌから回転中心線Ｌと直交する線上を経由した第２の掘削ビット８１（掘削ビット）の先端までの第２距離８１ｘが、回転掘削体が管２の内側で回転中心線Ｌを中心として回転不可能で、かつ、回転掘削体が先頭管６の先頭開口６ｔの前方に位置された場合に回転中心線Ｌを中心として回転可能な回転半径に設定されればよい。
つまり、第１距離を半径とした回転体５０の直径が、先頭管６の上下の内壁面６ｃ；６ｄ間の寸法よりも小さく設定され、かつ、第２距離８１ｘを掘削半径とした第２の掘削ビット８１による掘削径が、先頭管６の先頭管６の上下の内壁面６ｃ；６ｄ間の寸法９ｘよりも大きく設定されていることにより、回転掘削体４６Ａが先頭管６の先頭開口６ｔを介して先頭管６の前方及び先頭管６の内側に移動可能に構成される。
実施形態４によれば、第２の掘削ビット８１による掘削によって、先頭管６の前方において先頭管６の上下の内壁面６ｃ；６ｄ（先頭管６の一方の一対の壁面）と直交する方向である先頭管６の上下幅間隔よりも広い上下幅間隔で地山９９を掘削できるようになり、先頭管６の前方において先頭管６の上下幅方向での余堀が可能となるので、地山９９が硬質地盤である場合でも管をよりスムーズに推進させることが可能となる。 Embodiment 4
The rotary excavator may be configured not to include the first excavation bit 80. That is, a rotary excavator having only the second excavation bit 81 may be used as the excavation bit.
In short, in the case where the rotary excavator does not include the first excavation bit 80, the shortest distance from the rotation center line L to the outer peripheral surface 51 of the rotary body 50 of the rotary excavator passing through a line orthogonal to the rotation center line L. The first distance, which is the distance, is set to a rotation radius that allows the rotary excavator to rotate around the rotation center line L inside the pipe 6, and passes through a line perpendicular to the rotation center line L from the rotation center line L. The second distance 81x to the tip of the second excavation bit 81 (excavation bit) is such that the rotary excavator cannot rotate around the rotation center line L inside the pipe 2 and the rotary excavator is What is necessary is just to set to the rotation radius which can rotate centering | focusing on the rotation center line L, when it is located ahead of the head opening 6t.
That is, the diameter of the rotating body 50 with the first distance as the radius is set to be smaller than the dimension between the upper and lower inner wall surfaces 6c; 6d of the leading pipe 6, and the second distance 81x is the second digging radius. Since the excavation diameter by the excavation bit 81 is set to be larger than the dimension 9x between the upper and lower inner wall surfaces 6c; 6d of the front pipe 6 of the front pipe 6, the rotary excavator 46A opens the front opening 6t of the front pipe 6. It is configured to be movable in front of the leading pipe 6 and inside the leading pipe 6.
According to the fourth embodiment, by the excavation by the second excavation bit 81, in the direction orthogonal to the upper and lower inner wall surfaces 6c; 6d (one pair of wall surfaces of the leading pipe 6) in front of the leading pipe 6. Since the natural ground 99 can be excavated at a vertical interval wider than the vertical interval of a certain leading pipe 6, and an excavation in the vertical width direction of the leading pipe 6 is possible in front of the leading pipe 6, Even when 99 is hard ground, the pipe can be more smoothly propelled.

実施形態５
支柱４２の先端部に地山９９に向けて高圧水を噴射させる図外の噴射ノズルを設け、回転掘削体４６；４６Ａによる掘削とともに当該噴射ノズルより高圧水を噴射するようにした。これにより、回転掘削体４６；４６Ａの前方にも水が行き届いて回転掘削体４６；４６Ａの周囲を水が循環するので回転掘削体４６；４６Ａの周囲の泥水の濃度を均一にでき、回転掘削体４６；４６Ａの前方の泥水を確実に排泥できる。 Embodiment 5
An injection nozzle (not shown) that injects high-pressure water toward the natural ground 99 is provided at the tip of the support column 42, and high-pressure water is injected from the injection nozzle together with excavation by the rotary excavator 46; 46A. As a result, water reaches the front of the rotary excavator 46; 46A and the water circulates around the rotary excavator 46; 46A. Therefore, the concentration of mud around the rotary excavator 46; The muddy water in front of the body 46; 46A can be reliably discharged.

実施形態６
先頭管６の先頭開口縁６ｚは、先鋭部を備えた構成とした。例えば、先頭管６の左右の壁の先端形状が湾曲凹部状に形成されて先頭管６の先頭開口縁６ｚの４隅部が鋭利な先鋭部に形成された構成とすることで、先頭開口縁６ｚが地山に食い込みやすくなる。 Embodiment 6
The leading opening edge 6z of the leading tube 6 is configured to have a sharp point. For example, by adopting a configuration in which the front end shape of the left and right walls of the top tube 6 is formed in a curved concave shape and the four corners of the top opening edge 6z of the top tube 6 are formed into sharp sharp edges, the front opening edge 6z is easy to bite into natural ground.

尚、空間７８内に封入する水よりも粘性の高い液体としては、グリス８８以外のオイル等を用いても良く、空間７８内に泥水が流入するのを防止できる流動体であればよい。   In addition, as the liquid having higher viscosity than the water enclosed in the space 78, oil other than the grease 88 may be used as long as it is a fluid that can prevent the muddy water from flowing into the space 78.

回転掘削体を１つ又は３つ以上備えた掘削機械２６を用いてもよい。
また、掘削機械２６は、先頭管６の推進方向と交差する回転中心線を回転中心として回転する回転掘削体を備えたものであってもよい。 An excavating machine 26 including one or three or more rotary excavators may be used.
Further, the excavating machine 26 may include a rotating excavator that rotates about a rotation center line that intersects the propulsion direction of the leading pipe 6.

また、管を推進させる方法としては、実施形態１のように管２と掘削装置３とを一緒に押圧して管設置装置１を推進させる方法、実施形態２のように管２の後端面１０２ｅを押圧して管２を推進させるとともにグリッパ装置を介して掘削装置３を牽引させるように推進させる方法等のように、管２と掘削装置３とを一緒に推進させる方法、あるいは、管２と掘削装置３とを別々に押圧して管設置装置１を推進させる方法等がある。   Further, as a method of propelling the pipe, a method of pushing the pipe 2 and the excavator 3 together to push the pipe setting device 1 as in the first embodiment, and a rear end face 102e of the pipe 2 as in the second embodiment. A method of propelling the tube 2 and the excavator 3 together, such as a method of propelling the tube 2 by pushing and pushing the excavator 3 through the gripper device, or the tube 2 There is a method of pushing the excavator 3 separately and propelling the pipe installation device 1.

また、先に地中に入れる管の後端に後続管を連結しないようにし、地中に形成された空洞部から先に地中に入れる管のみを地中に設置して当該先に地中に入れる管のみ（即ち、１本の管）による支保工を形成するようにしてもよい。即ち、一方の空洞部１００と他方の空洞部１００とに跨る管を１本の管で形成するようにしてもよい。   Also, do not connect the following pipe to the rear end of the pipe that goes into the ground first, and install only the pipe that goes into the ground first from the cavity formed in the ground, and It is also possible to form a support with only the pipes to be put into the pipe (that is, one pipe). In other words, the pipe straddling the one cavity portion 100 and the other cavity portion 100 may be formed by a single tube.

また、管２は、断面形状が四角形状のものであればよい。尚、本発明でいう断面形状が四角形状とは、断面長方形、断面正方形、断面台形、断面平行四辺形などの四角形状を指し、四角の角部が面取りされた形状のものも含む。
また、本発明に使用する回転掘削体としては、図２に示すような片刃の掘削ビットを備えたものを用いてもよいし、図１１に示すような両刃の掘削ビットを備えたものを用いてもよい。 Moreover, the pipe | tube 2 should just be a thing with a square cross-sectional shape. In addition, the cross-sectional shape referred to in the present invention is a quadrilateral shape such as a cross-sectional rectangle, a cross-sectional square, a cross-sectional trapezoid, a cross-sectional parallelogram, and includes a shape in which square corners are chamfered.
Moreover, as a rotary excavation body used for this invention, you may use the thing provided with the single-edged excavation bit as shown in FIG. 2, or the thing provided with the double-edged excavation bit as shown in FIG. May be.

本発明では、回転掘削体４６の回転中心線Ｌが先頭管６の推進方向と直交する面及び先頭管６の互いに平行に対向する一対の内壁面としての先頭管６の上下の内壁面６ｃ；６ｄと平行な第１の状態に設定されるように回転掘削体４６が設置された構成を示したが、回転中心線Ｌが先頭管６の推進方向と直交する面及び先頭管６の互いに平行に対向する一対の壁面としての先頭管６の左右の内壁面６ａ；６ｂと平行な第１の状態に設定されるように回転掘削体４６が設置された構成であってもよい。   In the present invention, the rotation center line L of the rotary excavator 46 has a surface perpendicular to the propulsion direction of the front tube 6 and upper and lower inner wall surfaces 6c of the front tube 6 as a pair of inner wall surfaces opposite to each other in parallel. Although the structure in which the rotary excavator 46 is installed so as to be set in the first state parallel to 6d is shown, the plane in which the rotation center line L is perpendicular to the propulsion direction of the head pipe 6 and the head pipe 6 are parallel to each other. The rotary excavator 46 may be installed so as to be set in a first state parallel to the left and right inner wall surfaces 6a and 6b of the leading pipe 6 as a pair of wall surfaces facing each other.

本発明の空洞部１００は、シールドトンネルのセグメントで囲まれた空洞部、又は、山岳トンネルの壁で囲まれたトンネル空洞部、又は、立坑内の空間等により形成される。そして、本発明により形成される地下空間としては、上述した地下鉄ホームを形成する空間、トンネルの道路や線路における往路空間及び復路空間、トンネルの道路や線路における合流部又は分岐部、トンネルの道路や線路における拡幅部等がある。   The cavity 100 of the present invention is formed by a cavity surrounded by a shield tunnel segment, a tunnel cavity surrounded by a mountain tunnel wall, or a space in a shaft. And as underground space formed by the present invention, the space forming the above-mentioned subway platform, the forward space and the return space in the tunnel road and railroad, the junction or branching portion in the tunnel road and railroad, the tunnel road and There is a widened portion on the track.

１ 管設置装置、２ 管、６ 先頭管（管）、６ｔ 先頭開口、７ 後続管（管）、
１０ 地中、２５ 掘削機械揺動駆動装置、２６ 掘削機械、３０ 揺動基板、
３１ 案内部材、３２ 揺動基板駆動手段、４６ 回転掘削体、５０ 回転体、
５１ 回転体の外周面、７８ 空間、８０ 第１の掘削ビット、８０ｘ 第１距離、
８１ 第２の掘削ビット、８１ｘ 第２距離、８８ グリス、１００ 空洞部、
８１０ 第２の掘削ビット群、Ｌ 回転中心線。 1 pipe installation device, 2 pipes, 6 leading pipe (pipe), 6t leading opening, 7 following pipe (pipe),
10 underground, 25 excavating machine swing drive device, 26 excavating machine, 30 swing substrate,
31 Guide member, 32 Swing board drive means, 46 Rotating excavator, 50 Rotating body,
51 outer peripheral surface of rotating body, 78 space, 80 first excavation bit, 80x first distance,
81 second drilling bit, 81x second distance, 88 grease, 100 cavity,
810 Second drill bit group, L rotation center line.

Claims (3)

断面四角形状の管を地中に形成された空洞部から地中に設置する場合に、先に地中に入れる管の先頭開口の前方に管の推進方向と直交する面と平行な回転中心線を回転中心として回転する回転掘削体を設置し、管を進行させるとともに回転掘削体で地中を掘削することにより、管を推進させて地中に設置する管設置装置において、
回転掘削体の回転中心線を、管の互いに平行に対向する一方の一対の壁面と平行でかつ管の推進方向と直交する面と直交以外の状態で交差する状態に揺動させる掘削機械揺動駆動装置を備え、
掘削機械揺動駆動装置は、揺動基板と、揺動基板の案内部材と、揺動基板駆動手段とを備え、
案内部材は、筒部と筒部の一端開口を閉塞する底部とを有した断面四角形状の一端閉塞他端開口の有底箱状に形成されて、当該案内部材の筒部の筒の中心線と管の中心線とが同じになるように案内部材の他端開口側を管の先頭開口側に向けて管の先頭開口側の内側に設置され、
揺動基板は、管の互いに平行に対向する他方の一対の壁面間の中央を回転中心として揺動可能なように案内部材に取付けられ、
管の先頭開口よりも前方に位置された回転掘削体を支持する支柱が揺動基板に支持されており、
揺動基板駆動手段が揺動基板における一対の側壁側を前後に移動させることにより、回転掘削体の回転中心線が、管の互いに平行に対向する一方の一対の壁面と平行でかつ管の推進方向と直交する面と直交以外の状態で交差する状態に設定され、
揺動基板と案内部材の筒部と案内部材の底部とで囲まれた空間内には、水よりも粘性の高い液体が封入されていることを特徴とする管設置装置。 When a pipe with a square cross section is installed in the ground from a hollow part formed in the ground, the center of rotation is parallel to the plane perpendicular to the propulsion direction of the pipe in front of the head opening of the pipe that is first placed in the ground. In a pipe installation device that installs a rotary excavator that rotates around the center of rotation, advances the pipe and excavates the ground with the rotary excavator, thereby propelling the pipe and installing it in the ground,
Excavation machine swing that swings the rotational center line of the rotary excavator in a state that is parallel to one pair of parallel wall surfaces of the pipe and crosses the surface perpendicular to the propulsion direction of the pipe in a state other than perpendicular. With a drive,
The excavation machine swing drive device includes a swing substrate, a guide member for the swing substrate, and a swing substrate driving means.
The guide member is formed in a bottomed box shape having one end closed other end opening having a square cross section having a cylinder portion and a bottom portion closing one end opening of the tube portion, and the center line of the cylinder of the cylinder portion of the guide member And the other end opening side of the guide member toward the head opening side of the pipe so that the center line of the pipe is the same as the center line of the pipe,
The swing substrate is attached to the guide member so as to be swingable around the center between the other pair of wall surfaces of the pipe facing in parallel with each other,
A strut that supports the rotary excavator positioned forward of the top opening of the pipe is supported by the swing substrate,
The rocking substrate driving means moves the pair of side walls of the rocking substrate back and forth, so that the rotation center line of the rotary excavator is parallel to one pair of wall surfaces facing each other in parallel and the tube is propelled. It is set to a state that intersects with a direction other than orthogonal to a plane orthogonal to the direction,
A tube installation device characterized in that a liquid having a higher viscosity than water is sealed in a space surrounded by an oscillating substrate, a cylindrical portion of a guide member, and a bottom portion of the guide member. 回転掘削体は、回転中心線を回転中心として回転する回転体と、回転体の外周面より突出するように設けられた掘削ビットとを備え、
回転中心線から回転中心線と直交する線上を経由した回転体の外周面までの第１距離と回転中心線から回転中心線と直交する線上を経由した掘削ビットの先端までの第２距離とが異なり、
第１距離を半径とした回転体の直径が、管の一方の一対の壁面の内壁面間の寸法よりも小さく設定され、
第２距離を掘削半径とした掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも大きく設定されたことにより、
回転掘削体が管の先頭開口を介して管の前方及び管の内側に移動可能に構成されたことを特徴とする請求項１に記載の管設置装置。 The rotating excavator includes a rotating body that rotates about the rotation center line, and a drilling bit provided so as to protrude from the outer peripheral surface of the rotating body,
A first distance from the rotation center line to the outer peripheral surface of the rotating body via a line orthogonal to the rotation center line and a second distance from the rotation center line to the tip of the excavation bit via a line orthogonal to the rotation center line Differently
The diameter of the rotating body with the first distance as a radius is set smaller than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe,
The drilling diameter by the drilling bit with the second distance as the drilling radius is set to be larger than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe,
2. The pipe installation device according to claim 1, wherein the rotary excavator is configured to be movable in front of the pipe and inside the pipe through a leading opening of the pipe. 回転掘削体は、回転中心線を回転中心として回転する回転体と、回転体の外周面より突出するように設けられた第１の掘削ビットと第２の掘削ビットとを備え、
回転中心線から回転中心線と直交する線上を経由した第１の掘削ビットの先端までの第１距離と回転中心線から回転中心線と直交する線上を経由した第２の掘削ビットの先端までの第２距離とが異なり、
第１距離を掘削半径とした第１の掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも小さく設定され、
第２距離を掘削半径とした第２の掘削ビットによる掘削径が、管の一方の一対の壁面の内壁面間の寸法よりも大きく設定されたことにより、
回転掘削体が管の先頭開口を介して管の前方及び管の内側に移動可能に構成されたことを特徴とする請求項１に記載の管設置装置。 The rotary excavator includes a rotary body that rotates around the rotation center line, and a first excavation bit and a second excavation bit that are provided so as to protrude from the outer peripheral surface of the rotary body,
A first distance from the rotation center line to the tip of the first excavation bit via a line perpendicular to the rotation center line and a distance from the rotation center line to the tip of the second excavation bit via a line orthogonal to the rotation center line Unlike the second distance,
The drilling diameter by the first drilling bit with the first distance as the drilling radius is set smaller than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe,
The excavation diameter by the second excavation bit having the excavation radius as the second distance is set larger than the dimension between the inner wall surfaces of one pair of wall surfaces of the pipe,
2. The pipe installation device according to claim 1, wherein the rotary excavator is configured to be movable in front of the pipe and inside the pipe through a leading opening of the pipe.
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