JP4698512B2

JP4698512B2 - Method of collecting excavator body in tunnel excavator

Info

Publication number: JP4698512B2
Application number: JP2006187153A
Authority: JP
Inventors: 敏雄長江; 智久星; 弘美佐藤
Original assignee: Okumura Corp
Current assignee: Okumura Corp
Priority date: 2006-07-06
Filing date: 2006-07-06
Publication date: 2011-06-08
Anticipated expiration: 2026-07-06
Also published as: JP2008014042A

Description

本発明は、トンネル掘削機によって地中にトンネルを掘削しながら所定長の管路を形成したのち、該管路内を通じて掘削機本体を回収、撤去するトンネル掘削機における掘削機本体の回収方法に関するものである。 The present invention relates to a method for recovering an excavator body in a tunnel excavator in which a tunnel having a predetermined length is formed while excavating a tunnel in the ground by a tunnel excavator, and then the excavator body is recovered and removed through the pipe. Is.

発進立坑側からトンネル掘削機によって地中にトンネルを掘削しながら該掘削壁面にトンネル覆工体を施工することにより管路を形成していくトンネル工事においては、該トンネル掘削機が到達立坑に達すると、この到達立坑内から地上に回収して再利用することが行われているが、到達側に既存の人孔が設けられていたり、周辺に建物等が存在していて到達立坑が設けられない場合や２基のトンネル掘削機を地中でドッキングさせる場合のように到達立坑を設けない場合、或いは、到達立坑が未完成の場合や既設の長い管路にトンネル掘削機を直交させるように到達させた場合等には、トンネル掘削機を発進立坑側に向かって後退させて回収しなければならない。 In tunnel construction in which a tunnel is formed on the wall of the excavation wall while excavating the tunnel underground from the start shaft side with a tunnel excavator, the tunnel excavator reaches the reaching shaft. Then, it is carried out on the ground from this reach shaft and reused, but there is an existing human hole on the arrival side, or there is a building etc. in the vicinity and a reach shaft is provided. If there is no reaching shaft as in the case where there are no tunnel excavators or when two tunnel excavators are docked in the ground, or if the reaching shaft is not completed or the tunnel excavator is orthogonal to the existing long pipeline When it is reached, the tunnel excavator must be withdrawn toward the start shaft side and collected.

このような回収型のトンネル掘削機としては、例えば、特許文献１に記載されているように、外径が上記管路と略同一外径を有する円筒形状の外殻体と、この外殻体内に配設された掘削機本体とからなり、この掘削機本体は上記管路の内径よりも小径に形成され且つ上記外殻体内に後方に向かって引き出し可能に連結、支持されている内殻体を備えていると共に、この内殻体の前部に一体に設けている隔壁に外径が管路の内径よりも縮小可能なカッタヘッドを回転自在に支持させてあり、さらに、このカッタヘッドの駆動手段と、カッタヘッドによって掘削された掘削土砂の搬出手段とを備えた構造を有している。 As such a recovery-type tunnel excavator, for example, as described in Patent Document 1, a cylindrical outer shell whose outer diameter is substantially the same as that of the pipe, The excavator body is formed with a diameter smaller than the inner diameter of the conduit, and is connected to and supported by the outer shell body so that it can be pulled out rearward. A cutter head whose outer diameter is smaller than the inner diameter of the pipe is rotatably supported by a partition wall provided integrally with the front portion of the inner shell body. It has a structure including drive means and means for carrying out excavated earth and sand excavated by the cutter head.

そして、このトンネル掘削機によって所定長さまでトンネルを掘削すると、該トンネル掘削機に後続している油圧機器類等の設備を搭載した台車や覆工設備材料を搭載した台車等を発進立坑側に回収したのちこれらの台車の走行用軌条を全て撤去する一方、トンネル掘削機のカッタヘッドをトンネル覆工体の内径以下にまで縮径させたのち、外殻体を掘削壁面に残した状態で該外殻体から掘削機本体の内殻体を外殻体の後部内に引き込み、内殻体の下側周面にガイドローラを装着したのち、掘削機本体を後方に牽引することにより、該ガイドローラを管路の内底面上で転動させながら掘削機本体を発進立坑側に向かって回収している。
特開２００４−３４６６８８号公報 Then, when the tunnel is excavated to a predetermined length by this tunnel excavator, the bogie equipped with equipment such as hydraulic equipment following the tunnel excavator and the carriage equipped with lining equipment materials are collected on the start shaft side. After that, all the running rails of these trucks are removed, while the cutter head of the tunnel excavator is reduced to the inner diameter of the tunnel lining body and the outer shell remains on the excavation wall surface. By pulling the inner shell body of the excavator body from the shell body into the rear part of the outer shell body, attaching the guide roller to the lower peripheral surface of the inner shell body, and then pulling the excavator body backward, the guide roller The excavator body is recovered toward the start shaft side while rolling on the inner bottom surface of the pipeline.
JP 2004-346688 A

しかしながら、上記のようなトンネル掘削機における掘削機本体の回収方法によれば、管路内に敷設している軌条を撤去するまで掘削機本体の回収作業を行うことができないために、回収作業に手間を要するばかりでなく、軌条を撤去してしまうと、例えば、掘削壁面に残しておく上記外殻体の内周面に対するコンクリート打設作業時に、その打設設備の搬入、搬出用として利用できなくなる。さらに、掘削機本体の下側周面に搬送手段としてガイドローラを装着し、このガイドローラを管路の内底面上で転動させながら掘削機本体を回収するものであるから、ガイドローラによって管路の内底面が損傷する虞れがある。 However, according to the excavator body recovery method in the tunnel excavator as described above, the excavator body cannot be recovered until the rails laid in the pipeline are removed. Not only is it time-consuming, but if the rail is removed, it can be used, for example, for loading and unloading the casting equipment when placing concrete on the inner peripheral surface of the outer shell that is left on the excavation wall. Disappear. Further, a guide roller is mounted on the lower peripheral surface of the excavator body as a conveying means, and the excavator body is recovered while rolling the guide roller on the inner bottom surface of the pipe. The inner bottom surface of the road may be damaged.

また、掘削機本体の内殻体の長さが短い場合には、該内殻体の下周面の前後両側部にガイドローラが装着可能な面積を確保する事が困難であり、また、例え、ガイドローラを装着できたとしても、これらのガイドローラによる掘削機本体の支持が不安定となって、回収作業に困難をきたすといった問題点があった。 In addition, when the length of the inner shell of the excavator body is short, it is difficult to secure an area where guide rollers can be mounted on both the front and rear sides of the lower peripheral surface of the inner shell. Even if the guide rollers can be mounted, the support of the excavator main body by these guide rollers becomes unstable, and there is a problem that the recovery operation becomes difficult.

本発明はこのような問題点に鑑みてなされたもので、その目的とするところは、トンネル掘削機によってトンネルを掘削しながら所定長の管路を形成したのち、管路内に敷設している軌条を撤去することなく、その軌条を利用して掘削機本体を安定した搬送状態で能率よく回収することができるトンネル掘削機における掘削機本体の回収方法を提供するにある。 The present invention has been made in view of such problems, and its object is to form a predetermined length of a pipeline while excavating the tunnel with a tunnel excavator and then lay it in the pipeline. An object of the present invention is to provide a method for recovering an excavator body in a tunnel excavator that can efficiently recover the excavator body in a stable transport state using the rail without removing the rail.

上記目的を達成するために本発明のトンネル掘削機における掘削機本体の回収方法は、請求項１に記載したように、前端部内周面にリング状の第１隔壁を設けてなる外殻体と、この外殻体の第１隔壁に引き抜き可能に摺接、支持させた内殻体を備えていると共に該内殻体の前端部に第２隔壁を一体に設けてこの第２隔壁の背面にカッタ板の回転駆動手段を装着してなる掘削機本体と、この掘削機本体に回転自在に支持されたカッタ板とを備えてなるトンネル掘削機により、地中にトンネルを掘削しながら所定長の管路を形成したのち、この管路内を通じて上記掘削機本体を回収する方法であって、所定長のトンネル掘削完了後に上記カッタ板を掘削機本体から切り離して該掘削機本体を上記外殻体の第１隔壁から該外殻体の後部内に引き込んだのち、この掘削機本体を外殻体の上周部内周面に複数本のワイヤロープを介して吊支し、これらのワンヤーロープを伸縮操作することによって掘削機本体を上下方向に90度回転させ、しかるのち、該掘削機本体とカッタ板とを上記管路内に予め敷設している軌条上を走行可能な搬送手段によって後方に搬出することを特徴とする。 In order to achieve the above object, a method for recovering an excavator body in a tunnel excavator according to the present invention includes an outer shell body provided with a ring-shaped first partition wall on an inner peripheral surface of a front end portion, And an inner shell body that is slidably contacted and supported by the first partition wall of the outer shell body, and a second partition wall is integrally provided at the front end of the inner shell body on the back surface of the second partition wall. A tunnel excavator comprising an excavator body equipped with a cutter plate rotation driving means and a cutter plate rotatably supported by the excavator body, while excavating the tunnel in the ground, has a predetermined length. A method of recovering the excavator body through the pipe after forming a pipe, and after the tunnel excavation of a predetermined length is completed, the cutter plate is separated from the excavator body and the excavator body is separated from the outer shell body. drawn from the first partition wall in the rear of the outer shell Later, the excavator main body on the circumferential inner peripheral surface of the outer shell via a plurality of wire ropes and Tsu支, rotated 90 degrees excavator body in the vertical direction by extending and contracting operation of these Wan'yaropu, After that, the excavator main body and the cutter plate are carried out rearward by a conveying means capable of traveling on a rail preliminarily laid in the pipeline.

また、請求項２に記載のトンネル掘削機における掘削機本体の回収方法は、前端部内周面にリング状の第１隔壁を設けてなる外殻体と、この外殻体の第１隔壁に引き抜き可能に摺接、支持させた内殻体を備えていると共に該内殻体の前端部に第２隔壁を一体に設けてこの第２隔壁の背面にカッタ板の回転駆動手段を装着してなる掘削機本体と、この掘削機本体に回転自在に支持された縮径可能なカッタ板とを備えてなるトンネル掘削機により、地中にトンネルを掘削しながら所定長の管路を形成したのち、この管路内を通じて上記掘削機本体を回収する方法であって、所定長のトンネル掘削完了後に上記カッタ板を縮径させて掘削機本体と共に上記外殻体の第１隔壁から該外殻体の後部内に引き込んだのち、縮径カッタ板と共に掘削機本体を外殻体の上周部内周面に複数本のワイヤロープを介して吊支し、これらのワンヤーロープを伸縮操作することによって縮径カッタ板と共に掘削機本体を上下方向に90度回転させ、しかるのち、縮径カッタ板を備えたこの掘削機本体を上記管路内に予め敷設している軌条上を搬送手段を介して後方に搬出することを特徴とする。 According to a second aspect of the present invention, there is provided a method for recovering a main body of an excavator in a tunnel excavator, an outer shell body having a ring-shaped first partition wall provided on an inner peripheral surface of a front end portion, and a first partition wall of the outer shell body. An inner shell body that is slidably contacted and supported is provided, and a second partition wall is integrally provided at the front end of the inner shell body, and a rotation driving means for the cutter plate is mounted on the back surface of the second partition wall. A tunnel excavator comprising an excavator main body and a cutter plate capable of reducing diameter that is rotatably supported by the excavator main body, and after forming a predetermined length of a pipeline while excavating the tunnel in the ground, A method for recovering the excavator body through the pipe, wherein after the completion of tunnel excavation of a predetermined length, the diameter of the cutter plate is reduced and the outer shell body is removed from the first partition wall of the outer shell body together with the excavator body. After retracted into the rear, the excavating machine body with diameter cutter plate And Tsu支via a plurality of wire rope onto the shell circumferential inner peripheral surface, the excavator main body vertical direction is rotated 90 degrees with diameter cutter plate by extending and contracting operation of these Wan'yaropu, after accordingly, The excavator body provided with the reduced-diameter cutter plate is carried out on the rails preliminarily laid in the pipeline through the conveying means.

本発明の請求項１に係る発明によれば、トンネル掘削機によって地中にトンネルを掘削しながら所定長の管路を形成したのち、この管路内を通じて上記掘削機本体を回収する際に、掘削機本体に回転自在に支持されたカッタ板を掘削機本体から切り離して該掘削機本体を上記外殻体の後部内に引き込んだのち、この掘削機本体を上下方向に90度回転させ、しかるのち、該掘削機本体とカッタ板とを上記管路内に予め敷設している軌条上を走行可能な搬送手段によって後方に搬出するものであるから、管路内に敷設している軌条を撤去することなく、該軌条を利用して掘削機本体を搬送手段により回収することができ、従って、管路の内壁面を損傷させたりすることなく、掘削機本体の回収作業が円滑且つ能率よく行えるものである。 According to the invention according to claim 1 of the present invention, after forming a predetermined length of a pipeline while excavating a tunnel in the ground by a tunnel excavator, when recovering the excavator body through the pipeline, After cutting the cutter plate rotatably supported by the excavator main body from the excavator main body and drawing the excavator main body into the rear part of the outer shell body, the excavator main body is rotated 90 degrees vertically. After that, the excavator body and the cutter plate are transported backward by a transporting means capable of traveling on the rail preliminarily laid in the pipeline, and the rail laid in the pipeline is removed. The excavator main body can be recovered by the conveying means using the rails, and therefore the excavator main body can be recovered smoothly and efficiently without damaging the inner wall surface of the pipe. Is.

さらに、搬送手段により搬出するに際して、掘削機本体からカッタ板を切り離したのち該掘削機本体を上下方向に90度回転させるので、カッタ板の切り離しによって掘削機本体の前後方向の長さを内殻体の外径寸法に比して短くすることができてトンネル掘削機における外殻体内の狭い空間部であっても該掘削機本体を伏臥状態或いは仰臥状態にして搬送手段上に安定した状態で搭載することができ、この状態にして掘削機本体を搬送手段により軌条に沿って容易に回収することができる。 Further, when the cutter means is unloaded from the excavator body, the excavator body is rotated 90 degrees in the vertical direction, so that the length of the excavator body in the front-rear direction can be reduced by cutting the cutter plate. Even if it is a narrow space in the outer shell of a tunnel excavator, the excavator body can be placed in a prone state or a supine state in a stable state on the conveying means. In this state, the excavator body can be easily recovered along the rails by the conveying means.

また、請求項２に係る発明によれば、上記請求項１に記載のトンネル掘削機における掘削機本体の回収方法において、該掘削機本体の回収時にカッタ板を掘削機本体から取り外すことなく、外殻体の前端部内周面に一体に設けているリング状の第１隔壁内を通過可能な大きさに縮径させたのち、掘削機本体と共に上記外殻体の後部内に引き込むので、掘削機本体からのカッタ板の取り外し作業をなくすることができて外殻体の後部内への引き込み作業が能率よく行えるものであり、さらに、カッタ板と共に該掘削機本体を外殻体の後部内にの引き込んだのち、上記請求項１に記載の掘削機本体の回収方法と同様に、該掘削機本体を上下方向に90度回転させ、次いで、縮径カッタ板と共にこの掘削機本体を上記管路内に予め敷設している軌条上を搬送手段を介して後方に搬出するものであるから、管路の内周面を損傷させることなく該軌条を利用して掘削機本体をカッタ板と共に搬送手段により同時に且つ安定した搭載状態で回収することができ、回収作業の向上を図ることができる。 According to the invention of claim 2, in the method of recovering an excavator body in the tunnel excavator according to claim 1, the cutter plate is removed without removing the cutter plate from the excavator body when the excavator body is recovered. Since the diameter of the shell body is reduced to a size that can pass through the ring-shaped first partition wall provided integrally with the inner peripheral surface of the front end portion of the shell body, the excavator body is drawn into the rear portion of the outer shell body together with the excavator body. The work for removing the cutter plate from the main body can be eliminated, and the work for pulling it into the rear part of the outer shell body can be performed efficiently. Further, the excavator main body together with the cutter plate is placed in the rear part of the outer shell body. Then, the excavator body is rotated 90 degrees in the vertical direction in the same manner as in the method for recovering the excavator body according to claim 1, and then the excavator body is connected to the pipe line together with the reduced diameter cutter plate. On the rails laid in advance Since it is carried out rearward through the conveying means, the excavator body is recovered together with the cutter plate simultaneously and stably by the conveying means using the rails without damaging the inner peripheral surface of the pipeline. The collection work can be improved.

さらに、上記請求項１又は請求項２に記載のトンネル掘削機における掘削機本体の回収方法において、上記外殻体の第１隔壁からこの外殻体の後部内に引き込まれた掘削機本体を外殻体の上周部内周面に複数本のワイヤロープを介して吊支し、これらのワンヤーロープを伸縮操作することによって掘削機本体を上下方向に90度回転させるので、外殻体内の狭い作業空間部においても、周囲の機器類や掘削機本体自体を損傷させることなく、該掘削機本体を吊支した状態で比較的安全に且つ確実に起立状態から伏臥或いは仰臥状態にその姿勢を変更させることができ、搬送手段に安定した状態に容易に搭載することができる。 Further, in the recovery method of the excavator main body in a tunnel boring machine according to the claim 1 or claim 2, the outer excavating machine body drawn into the rear portion of the outer shell from the first partition wall of the outer shell Narrow working space in the outer shell because the excavator body is rotated 90 degrees in the vertical direction by suspending and supporting on the inner peripheral surface of the upper part of the shell via multiple wire ropes and extending and retracting these one-wire ropes. Even in the section, without changing the surrounding equipment or the excavator body itself, the posture of the excavator body can be changed from the standing state to the prone or supine state relatively safely and reliably in a state where the excavator body is suspended. And can be easily mounted in a stable state on the conveying means.

次に本発明の具体的な実施の形態を図面について説明すると、図１はトンネルＴを掘削しながらその掘削壁面にセグメント等のトンネル覆工体からなる管路Ｓを施工していくトンネル掘削機の簡略縦断面図であって、このトンネル掘削機は、外径がトンネル掘削径と略同径の円筒形状の外殻体１と、この外殻体１の前端部内周面にその外周端面を溶接等により一体に固着していると共に内周端面に前後方向に開口した円環部2aの前端部外周面を溶接等により一体に固着してなるリング状の第１隔壁２と、この第１隔壁２の円環部2aに後方に向かって引き込み可能に嵌合、支持されている掘削機本体３と、掘削機本体３に回転自在に支持されたカッタ板４と、このカッタ板４の回転駆動手段５とを備えてあり、第１隔壁２の円環部2aの内径は上記管路Ｓの内径よりも小径に形成されている。 Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a tunnel excavator that constructs a pipe line S made of a tunnel lining body such as a segment on the excavation wall surface while excavating the tunnel T. The tunnel excavator has a cylindrical outer shell 1 whose outer diameter is substantially the same as the tunnel excavating diameter, and an outer peripheral end face on the inner peripheral surface of the front end portion of the outer shell 1. A ring-shaped first partition wall 2 that is integrally fixed by welding or the like, and is formed by integrally fixing the outer peripheral surface of the front end portion of the annular portion 2a that opens in the front-rear direction to the inner peripheral end surface by welding or the like. The excavator body 3 is fitted and supported so as to be retractable toward the annular portion 2 a of the partition wall 2, the cutter plate 4 is rotatably supported by the excavator body 3, and the cutter plate 4 is rotated. Driving means 5, and the inner diameter of the annular portion 2 a of the first partition 2 is It has a smaller diameter than the inner diameter of road S.

上記掘削機本体３は、上記第１隔壁２の円環部2aの内周面にその外周面を後方に引き出し可能に摺接させていると共に円環部2aと略同一長さを有し、且つ、該円環部の前端縁にその前端縁をボルトによって着脱自在に連結している円環形状の内殻体６と、この内殻体６の前端にその外周端を固着して該内殻体６と一体に設けられている円板形状の第２隔壁７と、この第２隔壁７の背面に装着された上記回転駆動手段５とからなり、この回転駆動手段５は第２隔壁７の背面に一体に設けているハウジング８内に配設された噛合歯車機構（図示せず）と、ハウジング８の背面に取付けられた駆動モータ5aとから構成されていて駆動モータ5aによって噛合歯車機構を介して掘削機本体３の中心部に回転自在に支持されている上記カッタ板４の回転軸11を回転させるように構成している。 The excavator main body 3 is slidably contacted with the inner peripheral surface of the annular portion 2a of the first partition wall 2 so that the outer peripheral surface can be pulled out rearward, and has substantially the same length as the annular portion 2a. An annular inner shell 6 in which the front end edge is detachably connected to the front end edge of the annular portion by a bolt, and an outer peripheral end is fixed to the front end of the inner shell 6 and the inner end is fixed. The disk-shaped second partition wall 7 provided integrally with the shell body 6 and the rotation driving means 5 mounted on the back surface of the second partition wall 7 include the second partition wall 7. A meshing gear mechanism (not shown) disposed in the housing 8 provided integrally with the back surface of the housing 8 and a drive motor 5a attached to the back surface of the housing 8 are configured by the drive motor 5a. The rotary shaft 11 of the cutter plate 4 supported rotatably at the center of the excavator body 3 via It is configured to rotate.

このカッタ板４は外径が上記第１隔壁２の円環部2aよりも小径であって該円環部2aを通過可能な径に形成された円板形状の中央カッタ板部4aと、この中央カッタ板部4aの外周面に内周面を嵌合させたボルトにより着脱自在に結合している円環形状の外周カッタ板部4bと、この外周カッタ板部4bの外周面にボルトにより結合している外周リング部4cとからなり、該外周カッタ板部4bの外周リング部4cの外径はトンネル掘削機の外殻体１の外径に等しい径に形成されている。なお、中央カッタ板部4aはその中心部を上記第２隔壁７から前方に突出している上記回転軸11の先端にその中心部をボルト等を介して取り外し可能に嵌合、固定されている。また、上記外周カッタ板部4bは周方向に複数分割されていて互いに分解可能にボルトによって連結している。 The cutter plate 4 has a disc-shaped central cutter plate portion 4a having an outer diameter smaller than the annular portion 2a of the first partition wall 2 and having a diameter that can pass through the annular portion 2a, An annular outer cutter plate portion 4b that is detachably connected by a bolt having an inner peripheral surface fitted to the outer peripheral surface of the central cutter plate portion 4a, and a bolt connected to the outer peripheral surface of the outer cutter plate portion 4b. The outer peripheral ring portion 4c is formed so that the outer diameter of the outer peripheral ring portion 4c of the outer peripheral cutter plate portion 4b is equal to the outer diameter of the outer shell 1 of the tunnel excavator. The central cutter plate portion 4a is fitted and fixed to the tip of the rotating shaft 11 projecting forward from the second partition wall 7 through a bolt or the like. Further, the outer cutter plate part 4b is divided into a plurality of parts in the circumferential direction and is connected to each other by bolts so as to be disassembled.

さらに、このカッタ板４の前面には多数本のカッタビット９を前方に向かって突設していると共に中心部から外周端部に向かって複数の土砂取込み開口部4dを放射状に設けてあり、この土砂取込み開口部4dをカッタ板４の背面と上記の互いにその前面を略同一垂直面上に位置させている第１隔壁２と第２隔壁７との前面との間の空間部によって形成している土砂取込室10に連通させている。 Further, on the front surface of the cutter plate 4, a large number of cutter bits 9 are projected forward and a plurality of earth taking-in openings 4d are provided radially from the center portion toward the outer peripheral end portion, The earth and sand intake opening 4d is formed by a space between the back surface of the cutter plate 4 and the front surface of the first partition wall 2 and the second partition wall 7 with the front surfaces thereof being located on substantially the same vertical plane. The earth and sand take-up room 10 is connected.

また、掘削機本体３の背面外周部数カ所に断面Ｌ字状の反力受止部材12の垂直板部をボルトによって着脱自在に取付けると共にこれらの反力受止部材12の水平板部をそれぞれ外殻体１の内周面数カ所に固着した固定材12' にボルトにより着脱自在に固着して、これらの反力受止部材12により外殻体１に掘削機本体３を切り離し可能に連結している。 Further, the vertical plate portions of the reaction force receiving member 12 having an L-shaped cross section are removably attached to the excavator main body 3 at several locations on the outer periphery of the back surface by bolts, and the horizontal plate portions of these reaction force receiving members 12 are respectively removed. shell by fixing removably by 1 of the inner peripheral surface bolt fixing member 12 'which is fixed in several places, these reaction forces receiving member 12 and linked to disconnect the excavator main body 3 to the shell 1 Yes.

外殻体１は前胴部1aと後胴部1bとに分割されていて中折れ部13を介して前胴部1aの後端部と後胴部1bの前端部とを互いに屈折自在に連結していると共に後胴部1bの前端部内周面にリングガータ14を固着してこのリングガータ14に周方向に一定間隔毎に複数本の推進ジャッキ15を挿通状態で支持させてあり、これらの推進ジャッキ15のロッド先端を上記管路Ｓの前端面に当接させてこの管路Ｓに反力をとって伸長させることによりトンネル掘削機を推進させるように構成している。 The outer shell body 1 is divided into a front body portion 1a and a rear body portion 1b, and the rear end portion of the front body portion 1a and the front end portion of the rear body portion 1b are connected to each other through a bent portion 13 so as to be refractable. The ring garter 14 is fixed to the inner peripheral surface of the front end portion of the rear trunk 1b, and a plurality of propulsion jacks 15 are supported in the ring garter 14 at regular intervals in the circumferential direction. The forward end of the rod of the propulsion jack 15 is brought into contact with the front end surface of the pipe S, and the tunnel excavator is propelled by extending the pipe S by taking a reaction force.

さらに、上記中折れ部13を介して前胴部1aと後胴部1bとの内周面間を周方向に一定間隔毎に配設した複数本の中折れジャッキ16によって連結していると共に、後胴部1bの前部内に掘削壁面にセグメントを組立てて上記トンネル覆工体からなる管路Ｓを形成するエレクタ17を配設してあり、また、上記土砂取込室10から掘削土砂を排出する排土手段である送泥管18と排泥管19とを設けている。 Further, the inner peripheral surface of the front body part 1a and the rear body part 1b are connected by a plurality of middle folding jacks 16 arranged at regular intervals in the circumferential direction via the middle folding part 13, and An erector 17 is arranged in the front part of the rear trunk 1b to assemble segments on the excavation wall surface to form the pipe S composed of the tunnel lining body, and the excavated sediment is discharged from the sediment intake chamber 10 A mud pipe 18 and a mud pipe 19 are provided as soil discharging means.

このように構成したトンネル掘削機は発進立坑（図示せず）内に設置され、該カッタ板４を回転させながら所定方向にトンネルＴを掘進していく。そして、一定長のトンネルを掘削する毎に、エレクタにより掘削壁面にセグメントを組み立てて掘削壁面を覆工し、このトンネル覆工体からなる管路Ｓの前端面に上記推進ジャッキ15の推進反力を受止させて、該推進ジャッキ15を伸長させることによりトンネル掘削機Ａを前進させる。この時、推進ジャッキ15による推進力は外殻体１から上記反力受止部材12を介して掘削機本体３に伝達され、カッタ板４を切羽に押しつけながら地山を掘削すると共に、カッタ板４の回転反力はこの反力受止部材12を介して外殻体１に受止させて掘削機本体３のローリングの発生を防止しながら掘進する。カッタ板４によって掘削された土砂は土砂取込室10内に取り込まれ、この土砂取込室10に連通している上記送排泥管18、19による還流泥水によって泥水と共にトンネル内を通じて地上に排出される。 The tunnel excavator configured as described above is installed in a start shaft (not shown), and excavates the tunnel T in a predetermined direction while rotating the cutter plate 4. Each time a certain length of tunnel is excavated, segments are assembled on the excavation wall surface by an erector to cover the excavation wall surface, and the propulsion reaction force of the propulsion jack 15 is applied to the front end surface of the pipe line S composed of the tunnel lining body. The tunnel excavator A is moved forward by extending the propulsion jack 15. At this time, the propulsive force by the propulsion jack 15 is transmitted from the outer shell body 1 to the excavator main body 3 through the reaction force receiving member 12, excavating the natural ground while pressing the cutter plate 4 against the face, and the cutter plate The rotational reaction force 4 is received by the outer shell body 1 through the reaction force receiving member 12 and digs while preventing the rolling of the excavator body 3. The earth and sand excavated by the cutter plate 4 is taken into the earth and sand intake chamber 10 and discharged to the ground through the tunnel along with the muddy water by the return mud pipes 18 and 19 communicating with the earth and sand intake chamber 10. Is done.

こうしてトンネル掘削機によって所定位置まで掘削壁面にセグメントによる覆工を行いながら該セグメント覆工体からなる所定長の管路Ｓを形成したのち、該管路Ｓ内を通じて発進立坑側まで掘削機本体３を回収する作業に移る。 In this way, the tunnel excavator forms a pipe S of a predetermined length composed of the segment lining body while lining the excavation wall surface to a predetermined position with the segment, and then the excavator body 3 through the pipe S to the start shaft side. Move to work to collect.

この掘削機本体３の回収装置としては、図２、図３に示すように、上記管路Ｓ内にトンネル掘削機の後続台車の移動用として予め敷設されている軌条20と、図示していないが掘削機本体３を外殻体１の第１隔壁２の円環部2aから外殻体１の前胴部1a内にワイヤロープ等を介して牽引することにより引き抜く引抜き手段と、引き抜かれる掘削機本体３を支持する支持台21と、この支持台21上の掘削機本体３を吊支して上下方向に90度回転させることにより伏臥状態の姿勢に変えるための複数のチエーンブロックからなる姿勢変更手段22と、90度回転させられた掘削機本体３を載置して上記軌条20上を発進立坑に向かって移動する搬送手段である搬送台車23と、上記支持台21よりも上方に突出して上面に敷設した短尺レール25の後端を上記軌条20のレール20a の前端に連続させる移載台24とから構成している。 As shown in FIGS. 2 and 3, the recovery device for the excavator main body 3 is not shown in FIG. 2 and FIG. 3, and a rail 20 that is preliminarily laid in the pipe S for moving a subsequent carriage of the tunnel excavator. Pulls out the excavator main body 3 by pulling the excavator main body 3 from the annular portion 2a of the first partition wall 2 of the outer shell body 1 into the front body portion 1a of the outer shell body 1 through a wire rope, etc. A posture composed of a support base 21 for supporting the machine body 3 and a plurality of chain blocks for changing the posture to a prone state by hanging the excavator body 3 on the support base 21 and rotating it 90 degrees in the vertical direction. The change means 22, the excavator main body 3 rotated by 90 degrees, and the transfer carriage 23, which is a transfer means that moves on the rail 20 toward the start shaft, project above the support base 21. The rear end of the short rail 25 laid on the upper surface of the rail 20 of the rail 20 It is comprised from the transfer stand 24 connected to the front end of a.

上記軌条20は上記管路Ｓの内底面両側部間に架設、固定された状態で管路Ｓの長さ方向に一体間隔毎に配設された枕木20b とこの枕木20b 上に固定された並設レール20a とからなり、上記トンネル掘削機により一定長のトンネル部が掘削される毎にその掘削長に応じて先に敷設した軌道に継ぎ足しながらトンネル掘削機に後続して該トンネル掘削機と一体に前進する後続台車（図示せず）を移動させるようにしてあり、その前端はトンネル掘削機の後胴部1bの後方近傍部に設けられている。 The rails 20 are installed between the both sides of the inner bottom surface of the pipe S, and the sleepers 20b are arranged in the length direction of the pipe S at every integral interval, and the rails 20b are fixed on the sleepers 20b. consists of a set rail 20a, integral with subsequent to the tunnel boring machine in a tunnel boring machine while replenishing laying orbit above in accordance with the drilling length each time the tunnel portion of the fixed length is excavated by the tunneling machine A forward carriage (not shown) that moves forward is moved, and its front end is provided in the vicinity of the rear of the rear trunk 1b of the tunnel excavator.

上記支持台21は外殻体１の前胴部1aの後部における下周部上にその前後方向に水平な上面が掘削機本体３の引出し時の下周部における前後両側部に装着した引出し用ローラ26と同一高さとなるように設置される。また、上記チエーンブロックからなる姿勢変更手段22は外殻体１の前胴部1aの上周部内面における前部両側と後部両側、及び中間部両側とに配設されていてこれらのチエーンブロックのワイヤロープを掘削機本体３の前後面における上端両側部や後面における下端両側部に連繋等し、これらのワイヤロープを引き出したり、巻き戻すことによって掘削機本体３を上下方向にその向きを変更させるように構成している。 The above-mentioned support base 21 is a drawer for attaching to the front and rear sides of the front body portion 1a of the outer shell 1 on the front and rear sides of the lower circumference when the excavator body 3 is pulled out. It is installed so as to be the same height as the roller 26. Further, the posture changing means 22 composed of the chain block is disposed on both the front side, the rear side, and the middle side on the inner surface of the upper body portion 1a of the outer shell 1. The wire rope is connected to the both sides of the upper end on the front and rear surfaces of the excavator main body 3 and the lower end both sides on the rear surface, and the direction of the excavator main body 3 is changed in the vertical direction by pulling out and rewinding these wire ropes. It is configured as follows.

搬送台車23は、図４、図５に示すように、掘削機本体３の第２隔壁７の前面外周部を受止する多角形状の水平外枠23a とこの水平外枠23a の中央部に設けている矩形状の水平内枠23b とからなり、水平内枠23b は水平外枠23b よりも下方に小間隔を存して配設され、連結フレーム23c を介して水平外枠23a に一体に固着していると共に該水平内枠23b 内に第２隔壁７から前方に突出した上記カッタ板４の回転軸11の前端部を挿通させた状態で支持するように構成している。さらに、この搬送台車23の下面における前後両側部に上記軌条20のレール20a 上を回転する車輪27を取付けていると共に、上記水平外枠23a の両側前後部から下方に向かって脚片28、28を突設し、この脚片28、28の下端に、上記両側車輪27の外側方における枕木20b の両側端部上面に近接した状態で枕木20b と直交する方向、即ちトンネル長さ方向に向けて水平状に配設した転倒防止バー29、29を固着している。 As shown in FIGS. 4 and 5, the transport carriage 23 is provided in a polygonal horizontal outer frame 23a for receiving the outer peripheral portion of the front surface of the second partition wall 7 of the excavator body 3 and a central portion of the horizontal outer frame 23a. The horizontal inner frame 23b is disposed below the horizontal outer frame 23b with a small gap, and is integrally fixed to the horizontal outer frame 23a via the connecting frame 23c. At the same time, the front end portion of the rotating shaft 11 of the cutter plate 4 protruding forward from the second partition wall 7 is inserted into the horizontal inner frame 23b and supported. Further, wheels 27 that rotate on the rail 20a of the rail 20 are attached to the front and rear sides of the lower surface of the transport carriage 23, and leg pieces 28, 28 are downwardly directed from the front and rear sides of the horizontal outer frame 23a. And projecting at the lower end of the leg pieces 28, 28 toward the direction perpendicular to the sleeper 20b in the state of being close to the upper surface of the both ends of the sleeper 20b on the outer side of the both side wheels 27, that is, toward the tunnel length direction. The fall prevention bars 29 and 29 arranged horizontally are fixed.

移載台24は図２、図３に示すように、外殻体１の前胴部1aの内底面上における前後部とこれらの前後部の中間部とにおける両側部に上記軌条20の両側レール20a 、20a と同一間隔を存して設置した支持脚体30と、これらの脚体30における前後方向に直列状に並べている脚体30、30、30の上端面間上に架設状態で固着している上記短尺レール25とから構成されている。さらに、上記全ての脚体30は、上記支持台21の高さよりも低い高さの下側脚体部30a と、この下側脚体部30a の上端部に外側方に向かって折り畳み可能に枢着された上側脚体部30b とからなり、これらの上側脚体部30b の上端面間に上記短尺レール25を架設状態で固着している。そして、この上側脚体部30b を支持台21よりも上方に起立させることによって短尺レール25を上記軌条20のレール20a の前端面に突き合わせ状に連続させるように構成している。 As shown in FIGS. 2 and 3, the transfer table 24 has rails on both sides of the rail 20 on the front and rear portions on the inner bottom surface of the front barrel portion 1a of the outer shell body 1 and on the middle portions of the front and rear portions. The support legs 30 installed at the same intervals as 20a and 20a are fixed in an installed state between the upper end surfaces of the leg bodies 30, 30, 30 arranged in series in the front-rear direction of these leg bodies 30. The short rail 25 is configured as described above. Further, all the legs 30 are pivoted so as to be foldable outwardly at a lower leg 30a having a height lower than the height of the support 21 and an upper end of the lower leg 30a. The short rails 25 are fixed in an erected state between the upper end surfaces of the upper leg portions 30b. The upper leg 30b is erected above the support 21 so that the short rail 25 is continued in abutment with the front end surface of the rail 20a of the rail 20.

このように構成した回収装置を使用して掘削機本体３を回収するには、まず、外殻体１内に配設している上記エレクタ17や送排泥管18、19、反力受止部材12等の解体や取り外しを行って発進立坑側に回収、撤去して図６に示すように、掘削機本体３の後方側に該掘削機本体３が引出し可能な空間部を設けたのち、掘削機本体３の後方における外殻体１の前胴部1aの内底部上に上記支持台21を設置する。この際、支持台21と共に上記移載台24も設置してその上側脚体部30b を掘削機本体３の引出しの邪魔にならないように外側方に折り畳んでおく。なお、この移載台24は掘削機本体３を上下方向に90度回転させる際に設置してもよい。また、上記エレクタ17や送排泥管18、19等は、トンネル掘削機の外殻体１の後端近傍部にまで敷設している上記軌条20上を走行する台車（図示せず）等に搭載して発進立坑側に回収、撤去する。 In order to recover the excavator main body 3 using the recovery device configured as described above, first, the above-described erector 17 and the supply / discharge mud pipes 18 and 19 disposed in the outer shell 1 and the reaction force reception After disassembling and removing the member 12 and the like and collecting and removing it on the start shaft side, as shown in FIG. 6, after providing a space part where the excavator body 3 can be pulled out on the rear side of the excavator body 3, The support base 21 is installed on the inner bottom portion of the front trunk portion 1a of the outer shell 1 behind the excavator main body 3. At this time, the transfer table 24 is also installed together with the support table 21, and the upper leg 30b is folded outward so as not to obstruct the extraction of the excavator body 3. The transfer table 24 may be installed when the excavator body 3 is rotated 90 degrees in the vertical direction. In addition, the above-mentioned erector 17 and the supply and discharge mud pipes 18 and 19 are provided on a carriage (not shown) that travels on the rail 20 laid to the vicinity of the rear end of the outer shell 1 of the tunnel excavator. Mounted and collected on the start shaft side and removed.

さらに、掘削機本体３の第２隔壁７に設けている出入口（図示せず）を通じて作業員が土砂取込室10内に入り、カッタ板４の中心部と第２隔壁７から前方に突出している上記回転軸11の先端とを連結しているボルト等を取り外すと共にカッタ板４における外周カッタ板部4bと中央カッタ板部4aとの連結ボルトも取り外す一方、掘削機本体３の下周部における前後両側部に引出し用ローラ26（図７に示す）を取付けると共に第１隔壁２の円環部2aと掘削機本体３の内殻体６とのボルトにより連結を解いたのち、軌条20上を走行する牽引車等からなる引抜き手段から引き出されたワイヤロープを掘削機本体３の後面に連繋してこの引抜き手段で掘削機本体３を牽引することにより掘削機本体３の内殻体６を外殻体１に固着している第１隔壁２の円環部2aから抜き取りながら該掘削機本体３を後退させて、図７に示すように、支持台21上に乗せる。この際、掘削機本体３の下周部に支持台21と同一高さに装着されている引出し用ローラ26が支持台21上を回転しながら掘削機本体３が円滑に引き出される。 Further, an operator enters the earth and sand taking-in chamber 10 through an entrance (not shown) provided in the second partition wall 7 of the excavator body 3 and protrudes forward from the center portion of the cutter plate 4 and the second partition wall 7. The bolts connecting the tip of the rotary shaft 11 are removed and the connecting bolts between the outer cutter plate portion 4b and the central cutter plate portion 4a of the cutter plate 4 are also removed, while the lower end portion of the excavator main body 3 is removed. Attach the drawer rollers 26 (shown in FIG. 7) to both the front and rear sides and disconnect the connection between the ring portion 2a of the first partition wall 2 and the inner shell 6 of the excavator body 3 with A wire rope drawn from a pulling means composed of a traveling towing vehicle or the like is connected to the rear surface of the excavator main body 3 and the excavator main body 3 is pulled by this pulling means to remove the inner shell body 6 of the excavator main body 3. An annulus 2a of the first partition 2 fixed to the shell 1 The excavator main body 3 is retracted while being pulled out from the base and placed on the support base 21 as shown in FIG. At this time, the excavator main body 3 is smoothly pulled out while the drawer roller 26 mounted on the lower peripheral portion of the excavator main body 3 at the same height as the support base 21 rotates on the support base 21.

この掘削機本体３の後方への引出しによってカッタ板４は該掘削機本体３から分離するので、このカッタ板４の中央カッタ板部4aを上記引抜き手段等を利用して外周カッタ板部4bから後方に取り外し、第１隔壁２の円環部2a等にワイヤロープで吊支した状態にして外殻体１の前端部内に仮置きしておくと共に外周カッタ板部4bはその外周リング部4cを外殻体１の前方側の掘削地盤に接した状態にして残置させておく。 Since the cutter plate 4 is separated from the excavator main body 3 by pulling the excavator main body 3 backward, the central cutter plate portion 4a of the cutter plate 4 is removed from the outer cutter plate portion 4b by using the above-described extraction means. Removed rearward, suspended temporarily with a wire rope on the annular portion 2a of the first partition 2, etc. and temporarily placed in the front end of the outer shell 1, and the outer cutter plate portion 4b has its outer ring portion 4c The outer shell 1 is left in contact with the excavation ground on the front side.

支持台21上に引き出された掘削機本体３は、次いで、外殻体１の前胴部1aの上周部内面に装着された複数のチエーンブロックよりなる姿勢変更手段22によって僅かに吊り上げられ、この状態で上下方向（前後方向）に90度回転させられてその第２隔壁７を正面に向けた状態から伏臥状態に姿勢を変更させられる。なお、この姿勢変更手段22は掘削機本体３を引き出す前に装着しておいてもよく、引出し後に装着してもよい。 The excavator body 3 pulled out on the support base 21 is then lifted slightly by the posture changing means 22 comprising a plurality of chain blocks mounted on the inner surface of the upper peripheral portion of the front body portion 1a of the outer shell body 1, In this state, it is rotated 90 degrees in the vertical direction (front-rear direction), and the posture can be changed from the state in which the second partition wall 7 faces the front to the prone state. The posture changing means 22 may be mounted before the excavator body 3 is pulled out, or may be mounted after the pulling out.

この姿勢変更手段22によって掘削機本体３を90度、上下方向に回転させるには、まず、図８〜図10に示すように外殻体１の前胴部1aの上周部内面における前部両側部に配設している姿勢変更手段22のワイヤロープ22a を掘削機本体３の前面における上端両側部に、中間部両側部に配設している姿勢変更手段22のワイヤロープ22b を掘削機本体３の後面における上端両側部にそれぞれ連繋してこれらのワイヤロープ22a 、22b を収縮させることにより掘削機本体３を起立状態、即ち、その第２隔壁７を正面に向けた状態を保持したまま僅かに吊り上げて支持台21上から離間させ、宙吊り状態にする。 In order to rotate the excavator body 3 up and down by 90 degrees by the posture changing means 22, first, as shown in FIGS. 8 to 10, the front portion on the inner surface of the upper peripheral portion of the front trunk portion 1a of the outer shell 1 is used. The wire ropes 22a of the posture changing means 22 disposed on both sides are disposed on the upper end both sides of the front surface of the excavator body 3, and the wire ropes 22b of the posture changing means 22 disposed on both sides of the intermediate portion are excavators. The excavator body 3 is kept in an upright state, that is, with its second partition wall 7 facing forward, by contracting these wire ropes 22a and 22b, respectively, connected to both upper end sides of the rear surface of the body 3. Slightly lift it away from the support 21 and suspend it.

次いで、外殻体１の前胴部1aの上周部内面における後部両側部に配設している姿勢変更手段22のワイヤロープ22c を掘削機本体３の後面における下端両側部に連繋したのち、図11に示すようにこのワイヤロープ22c を収縮する方向に引っ張る一方、上記掘削機本体３の前後面における上端両側部に連繋しているワイヤロープ22a 、22b を上記ワイヤロープ22c の引張量に応じてその伸長量を調節しながら掘削機本体３をゆっくりとその上端側が前方に、後端側が後方に移動するように操作して伏臥する方向に回転させていく。 Next, after connecting the wire ropes 22c of the posture changing means 22 disposed on both sides of the rear part of the upper inner surface of the front body part 1a of the outer shell body 1 to both sides of the lower end of the rear surface of the excavator body 3, As shown in FIG. 11, while pulling the wire rope 22c in the contracting direction, the wire ropes 22a and 22b connected to both upper and lower end portions of the front and rear surfaces of the excavator body 3 are made according to the tensile amount of the wire rope 22c. The excavator body 3 is slowly rotated in a prone direction by operating the excavator body 3 slowly so that the upper end side moves forward and the rear end side moves rearward while adjusting the extension amount.

掘削機本体３がある程度、回転すると、図12〜図14に示すように、掘削機本体３の前面上端両側部に連繋していたワイヤロープ22a 、22a を上記中間部のワイヤロープ22b 、22b が連繋している掘削機本体３の後面上端両側部にその連繋部を移したのち、さらに、掘削機本体３を伏臥する方向に回転させていく。この際、掘削機本体３はその機長（回転軸11の長さ）を、該掘削機本体３の外径（第２隔壁７の径）と同等又はやや短い形状に形成されているので、外殻体１内の狭い空間部であっても周囲の機器類等に衝接することなく宙吊り状態で確実に上下方向（前後方向）に回転させることができる。 When the excavator body 3 is rotated to some extent, as shown in FIGS. 12 to 14, the wire ropes 22a and 22a connected to both sides of the upper end of the front surface of the excavator body 3 are replaced with the wire ropes 22b and 22b of the intermediate portion. After moving the connecting portions to the both sides of the rear upper end of the connected excavator body 3, the excavator body 3 is further rotated in a prone direction. At this time, the excavator body 3 is formed so that its length (the length of the rotary shaft 11) is equal to or slightly shorter than the outer diameter of the excavator body 3 (diameter of the second partition wall 7). Even in a narrow space in the shell 1, it can be reliably rotated in the vertical direction (front-rear direction) in a suspended state without colliding with surrounding devices.

そして、掘削機本体３が図15、図16に示すようにその第２隔壁７が水平状態に、回転軸11が垂直状態となるまで伏臥すると、図17に示すように外殻体１の前胴部1aの内底面上に設置している移載台24の両側短尺レール25、25を、脚体部30における下側脚体部30a に対して該短尺レール25を一体に設けている上側脚体部30b を上方に回動させることにより起立させると共に、これらの両側短尺レール25、25と外殻体１の後方近傍部にまで敷設している上記軌条20のレール20a 、20a との間にこの軌条20を延長するように該軌条20と同一構造の回収用軌条20' を敷設し、上記短尺レール25、25をこの回収用軌条20' のレール20a を介して上記軌条20のレール20a 、20a に連続させる。なお、この回収用軌条20' の敷設は、掘削機本体３の上下方向への回転作業中に行ってもよい。 When the excavator body 3 is prone until the second partition wall 7 is in a horizontal state and the rotary shaft 11 is in a vertical state as shown in FIGS. 15 and 16, the front of the outer shell 1 is shown in FIG. The short rails 25, 25 on both sides of the transfer table 24 installed on the inner bottom surface of the trunk portion 1a are integrated with the lower leg body portion 30a of the leg body portion 30 so that the short rail 25 is integrally provided. Between the rails 20a, 20a of the rail 20 that is erected by rotating the leg portion 30b upward and that is also laid to the rear vicinity of the outer shell 1 on both side short rails 25, 25 A recovery rail 20 ′ having the same structure as the rail 20 is laid to extend the rail 20, and the short rails 25 and 25 are connected to the rail 20a of the rail 20 via the rail 20a of the recovery rail 20 ′. , 20a. The recovery rail 20 'may be laid during the rotating operation of the excavator body 3 in the vertical direction.

次いで、発進立坑側から軌条20上を走行させながら搬送台車23を回収用軌条20' 上から移載台24上の短尺レール25上に搬入したのち、上記図２に示すように姿勢変更手段22のワイヤロープを徐々に伸長させながら伏臥状態で掘削機本体３を降下させ、搬送台車23に面した第２隔壁７の中心部から下方に向かって垂直状に突出している回転軸11の突出端部を搬送台車23の水平内枠23b 内に挿通させると共に第２隔壁７の外周部を搬送台車23の水平外枠23a の上面に受止させる。 Next, the transport carriage 23 is carried from the recovery rail 20 'onto the short rail 25 on the transfer table 24 while traveling on the rail 20 from the start shaft side, and then the posture changing means 22 as shown in FIG. While the wire rope is gradually extended, the excavator body 3 is lowered in a prone state, and the projecting end of the rotating shaft 11 projects vertically downward from the center of the second partition wall 7 facing the transport carriage 23. And the outer peripheral portion of the second partition wall 7 is received on the upper surface of the horizontal outer frame 23a of the transport carriage 23.

このように、第２隔壁７から下方に突出している回転軸11を搬送台車23の水平内枠23b
内に挿通させるので、掘削機本体３を低い姿勢でもって搬送台車23上に搭載することができると共に、第２隔壁７の外周部を搬送台車23の水平外枠23a 上に支持させるので、グラツキ等が生じることなく安定した姿勢となるように搬送台車23上に搭載することができ、掘削機本体３の搬出作業が能率よく行うことができる。 Thus, the rotary shaft 11 protruding downward from the second partition wall 7 is used as the horizontal inner frame 23b of the transport carriage 23.
Since the excavator body 3 can be mounted on the transport carriage 23 with a low posture and the outer peripheral portion of the second partition wall 7 is supported on the horizontal outer frame 23a of the transport carriage 23, Therefore, the excavator body 3 can be carried out efficiently.

掘削機本体３を搬送台車23上に積み込むと、姿勢変更手段22のワイヤロープによる支持を解き、しかるのち、搬送台車23を図３に示す外殻体１内における移載台24上から回収用軌条20’上を通じて図４及び図18に示すように、軌条20上に移動させ、この軌条20上を発進立坑側に向かって管路Ｓ内を走行させて掘削機本体３を回収、撤去するものである。この際、搬送台車23における上記水平外枠23a の両側部に脚片28、28を下方に向かって突設し、この脚片28、28の下端間に、搬送台車23の走行用車輪27の外側方における枕木20b の両側端部上面に近接した状態で転倒防止バー29、29を固着しているので、搬送台車23が走行中に左右方向に傾動しようとすると、該転倒防止バー29が枕木20b に当接して大きく傾動するのを確実に阻止し、安定した状態で掘削機本体３を回収することができる。 When the excavator body 3 is loaded on the transport carriage 23, the support of the posture changing means 22 by the wire rope is released, and then the transport carriage 23 is recovered from the transfer base 24 in the outer shell 1 shown in FIG. As shown in FIG. 4 and FIG. 18 through the rail 20 ′, it is moved onto the rail 20, and travels on the rail 20 toward the start shaft side in the pipeline S to collect and remove the excavator body 3. Is. At this time, leg pieces 28 and 28 are provided so as to protrude downward on both sides of the horizontal outer frame 23a of the transport carriage 23, and between the lower ends of the leg pieces 28 and 28, the traveling wheels 27 of the transport carriage 23 are provided. Since the fall prevention bars 29 and 29 are fixed in the state of being close to the upper surfaces of both end portions of the sleeper 20b on the outer side, if the transport carriage 23 tries to tilt left and right while traveling, the fall prevention bar 29 The excavator main body 3 can be recovered in a stable state by reliably preventing a large tilt by contacting with 20b.

この掘削機本体３の回収後、上記搬送台車23を再びトンネル掘削機の外殻体１内に設置している移載台24上の短尺レール25、25上にまで搬入し、図19に示すように、カッタ板４の中央カッタ板部4aを該搬送台車23上に搭載したのち、上記掘削機本体３と同様に該搬送台車23を軌条20上を走行させて発進立坑側に回収、撤去する。なお、カッタ板４の外周カッタ板部4bも掘削壁面に支持されている外周リング部4cから取り外して搬送台車23により回収、撤去する。 After the excavator body 3 is collected, the transport carriage 23 is again carried onto the short rails 25 and 25 on the transfer table 24 installed in the outer shell 1 of the tunnel excavator, as shown in FIG. As described above, after the central cutter plate portion 4a of the cutter plate 4 is mounted on the transfer carriage 23, the transfer carriage 23 is run on the rail 20 and is collected and removed on the start shaft side in the same manner as the excavator body 3 described above. To do. Note that the outer cutter plate portion 4b of the cutter plate 4 is also removed from the outer ring portion 4c supported by the excavation wall surface and collected and removed by the transport carriage 23.

こうして、掘削機本体３やカッタ板４の中央カッタ板部4aと外周カッタ板部4bの回収後、推進ジャッキ15や中折れジャッキ16等も回収、撤去すると共に第１隔壁２やリングガータ14等を切除して撤去し、さらに、支持台21や移載台24を撤去したのち、切羽近傍部の掘削壁面の覆工材として残置している外殻体１とカッタ板４の外周リング部4cとの内周面にコンクリートを打設することにより、トンネル覆工体からなる管路Ｓの内径と同じ内径のトンネル覆工体を形成する。この際、コンクリートの打設設備は、上記軌条20、20' を利用して外殻体１内にまで搬入され、打設後、この軌条20、20' を利用して搬出される。 Thus, after collecting the central cutter plate portion 4a and the outer cutter plate portion 4b of the excavator body 3 and the cutter plate 4, the propulsion jack 15, the bent jack 16 and the like are also collected and removed, and the first partition wall 2, the ring gutter 14, etc. After removing the support table 21 and the transfer table 24, the outer ring body 4c and the outer ring portion 4c of the cutter plate 4 left as the lining material for the excavation wall surface in the vicinity of the face are removed. The tunnel lining body having the same inner diameter as the inner diameter of the pipe line S made of the tunnel lining body is formed by placing concrete on the inner peripheral surface. At this time, the concrete placement equipment is carried into the outer shell 1 using the rails 20 and 20 ', and after placement, the concrete placement equipment is carried out using the rails 20 and 20'.

なお、上記実施の形態においては、掘削機本体３と、カッタ板４を縮径した形状の中央カッタ板部4aとを別々に回収しているが、トンネル掘削機の外殻体１内の作業空間部に余裕があれば、掘削機本体３と中央カッタ板部4aとを分離させることなく一体に回収してもよい。 In the above embodiment, the excavator main body 3 and the central cutter plate portion 4a having a reduced diameter of the cutter plate 4 are separately collected, but the work in the outer shell 1 of the tunnel excavator is performed. If there is room in the space, the excavator body 3 and the central cutter plate 4a may be collected together without being separated.

即ち、上記のように構成したトンネル掘削機によって発進立坑内から地中の所定位置までトンネルを掘削しながら該掘削壁面にセグメント覆工による管路Ｓを形成したのち、外殻体１内に配設している上記エレクタ17や送排泥管18、19、反力受止部材12等の解体や取り外しを行って発進立坑側に回収、撤去して図６に示すように、掘削機本体３の後方側に該掘削機本体３が引出し可能な空間部を設けたのち、掘削機本体３の後方における外殻体１の前胴部1aの内底部上に上記支持台21を設置する。この際、支持台21と共に上記移載台24も設置してその上側脚体部30b を掘削機本体３の引出しの邪魔にならないように外側方に折り畳んでおく。 That is, a tunnel S is excavated from the starting vertical shaft to a predetermined position in the ground by the tunnel excavator configured as described above, and a pipe line S is formed by segment lining on the excavation wall surface, and then the pipe is arranged in the outer shell 1. As shown in FIG. 6, the excavator body 3 is disassembled and removed from the starter pit side by disassembling and removing the above-mentioned erector 17, the feeding / draining mud pipes 18 and 19, the reaction force receiving member 12, etc. The excavator main body 3 is provided with a space on the rear side so that the excavator main body 3 can be pulled out, and then the support base 21 is installed on the inner bottom of the front body 1a of the outer shell 1 at the rear of the excavator main body 3. At this time, the transfer table 24 is also installed together with the support table 21, and the upper leg 30b is folded outward so as not to obstruct the extraction of the excavator body 3.

さらに、掘削機本体３の第２隔壁７に設けている出入口（図示せず）を通じて作業員が土砂取込室10内に入り、カッタ板４における外周カッタ板部4bと中央カッタ板部4aとの連結ボルトを取り外す一方、掘削機本体３の下周部における前後両側部に引出し用ローラ26を取付けると共に第１隔壁２の円環部2aと掘削機本体３の内殻体６とのボルトにより連結を解いたのち、軌条20上を走行する牽引車等からなる引抜き手段から引き出されたワイヤロープを掘削機本体３の後面に連繋してこの引抜き手段で掘削機本体３を牽引することにより掘削機本体３の内殻体６を外殻体１に固着している第１隔壁２の円環部2aから抜き取ると共に該円環部2a内を通じてカッタ板４を縮径した形状の中央カッタ板部4aを掘削機本体３と共に後退させ、上記支持台21上に乗せる。 Further, an operator enters the earth and sand taking-in chamber 10 through an entrance (not shown) provided in the second partition wall 7 of the excavator main body 3, and the outer cutter plate portion 4b and the central cutter plate portion 4a in the cutter plate 4 While removing the connecting bolts, the pull-out rollers 26 are attached to both the front and rear sides of the lower peripheral portion of the excavator body 3 and the bolts between the annular portion 2a of the first partition wall 2 and the inner shell body 6 of the excavator body 3 are used. After disconnecting, excavating by pulling the excavator main body 3 with this pulling means by connecting the wire rope drawn from the pulling means consisting of a towing vehicle etc. traveling on the rail 20 to the rear surface of the excavator main body 3 A central cutter plate having a shape in which the inner shell 6 of the machine body 3 is extracted from the annular portion 2a of the first partition 2 fixed to the outer shell 1, and the cutter plate 4 is reduced in diameter through the annular portion 2a. 4a is moved back together with the excavator main body 3 and above the support base 21 Place.

次いで、全面に中央カッタ板部4aを一体に設けている掘削機本体３の前後面の所定箇所に上記実施の形態と同様にして外殻体１の前胴部1aの上周部内面に装着された複数のチエーンブロックよりなる姿勢変更手段22のワイヤロープを連繋したのち、これらの姿勢変更手段22を操作して掘削機本体３を宙吊り状態にすると共にその状態から上記同様にして該掘削機本体３を上下方向（前後方向）に90度回転させてその第２隔壁７を正面に向けた状態から伏臥状態に姿勢を変更させる。 Next, in the same manner as in the above-described embodiment, the excavator body 3 is integrally provided with the central cutter plate portion 4a on the entire surface. After connecting the wire ropes of the posture changing means 22 composed of a plurality of chain blocks, the excavator main body 3 is suspended from the state by operating these posture changing means 22 and the excavator in the same manner as described above. The main body 3 is rotated 90 degrees in the vertical direction (front-rear direction) to change the posture from the state in which the second partition 7 is directed to the front to the prone state.

一方、この掘削機本体３の下方における外殻体１の内底面上に設置している移載台24の両側短尺レール25、25を、下側脚体部30a に対して上側脚体部30b を上方に回動させることにより起立させて、これらの両側短尺レール25と外殻体１の後方近傍部にまで敷設している上記軌条20のレール20a 、20a 間とを上記回収用軌条20' によって連続させた状態にして発進立坑側から軌条20上を走行させながら搬送台車23' を回収用軌条20' 上から移載台24上の短尺レール25上に搬入して掘削機本体３を図20に示すようにこの搬送台車23' 上に搭載させる。 On the other hand, the short rails 25 and 25 on both sides of the transfer table 24 installed on the inner bottom surface of the outer shell 1 below the excavator body 3 are connected to the upper leg 30b with respect to the lower leg 30a. The rails 20a and 20a of the rail 20 that are laid up to the rear vicinity of the outer shell 1 between the two short rails 25 and the rails 20a and 20a that are laid on both sides are moved upward. The transport carriage 23 'is carried from the recovery rail 20' onto the short rail 25 on the transfer stand 24 while traveling on the rail 20 from the starting shaft side in a continuous state by the excavator main body 3 As shown in FIG. 20, it is mounted on the transport carriage 23 ′.

この際、搬送台車23’としては、上記のように水平外枠23a と水平内側23b とを上下に間隔を存して配設してなる搬送台車23を使用してもよいが、このような構成では搬送台車23の高さが高くなって搬出し難くなる事態が発生するので、この搬送台車23’としては、中央にカッタ板４の中央部、例えば、その中央部の前面にカッタビット9'を突設している構造のカッタヘッドの場合には、そのカッタビット9'を挿通状態で支持している孔を設けた薄い平板状の枠23a'の下面に車輪27を軸支してなる構造の台車を採用している。 At this time, as the transport carriage 23 ′, the transport carriage 23 in which the horizontal outer frame 23a and the horizontal inner side 23b are arranged at intervals in the vertical direction as described above may be used. In the configuration, a situation occurs in which the height of the transport carriage 23 becomes high and it becomes difficult to carry out. Therefore, the transport carriage 23 'has a central portion of the cutter plate 4 at the center, for example, a cutter bit 9 at the front of the central portion. In the case of a cutter head having a structure in which `` is projecting, the wheel 27 is pivotally supported on the lower surface of a thin flat frame 23a '' provided with a hole for supporting the cutter bit 9 'in the inserted state. A cart with the following structure is adopted.

こうして、縮径形状の中央カッタ板部4aを備えている掘削機本体３を搭載した搬送台車23' を移載台24上から回収用軌条20’上を通じて軌条20上に移動させ、この軌条20上で発進立坑側に向かって管路Ｓ内を走行させて中央カッタ板部4aと一体に掘削機本体３を回収、撤去するものである。 In this way, the transport carriage 23 ′ on which the excavator body 3 having the central cutter plate portion 4a having the reduced diameter shape is mounted is moved from the transfer table 24 onto the rail 20 through the recovery rail 20 ′. The excavator main body 3 is collected and removed together with the central cutter plate portion 4a by running in the pipeline S toward the start vertical shaft.

なお、以上のいずれの実施の形態においても、カッタ板４として中央カッタ板部4aの外周部に円環形状の外周カッタ板部4bを取り外し可能に装着し、この外周カッタ板部4bを取り外すことにより第１隔壁２の円環部2aを通過可能な径に縮小させるように構成しているが、回転軸11の先端から径方向に第１隔壁２の円環部2aの半径よりも僅かに短い長さを有する複数本の中空スポークを放射状に突設し、これらの中空スポーク内に外周側スポーク片を、該中空スポーク内に配設した油圧ジャッキの作動によって中空スポークから延長方向に出没自在に配設し、これらの中空スポークと外周側スポーク片の前面に複数の掘削ビット前方に向かって突設してなるスポークタイプのカッタヘッドであってもよく、さらに、掘削土砂の搬出手段として、上記送泥管18、19に代えてスクリューコンベア等を採用しているトンネル掘削機であってもよい。 In any of the above embodiments, the annular cutter plate 4b is removably attached to the outer periphery of the central cutter plate 4a as the cutter plate 4, and the outer cutter plate 4b is removed. Is configured to reduce the diameter so that it can pass through the annular portion 2a of the first partition wall 2, but is slightly smaller than the radius of the annular portion 2a of the first partition wall 2 in the radial direction from the tip of the rotating shaft 11. A plurality of hollow spokes having a short length project radially, and outer side spoke pieces can be protruded and extended from these hollow spokes in the extending direction by operation of a hydraulic jack disposed in the hollow spokes. It may be a spoke-type cutter head that protrudes toward the front of a plurality of excavation bits on the front surface of these hollow spokes and outer peripheral spoke pieces, and further, as a means for carrying out excavated earth and sand, the above It may be a tunneling machine which employs the screw conveyor or the like in place of the mud pipe 18, 19.

また、掘削機本体３の回収時において、該掘削機本体３を伏臥させる方向に回動させてその第２隔壁７を下方に向けた状態で搬送台車23上に搭載しているが、仰臥させる方向に回動させてその第２隔壁７を上向きにした状態で搬送台車23上に搭載してもよい。 Further, when the excavator main body 3 is collected, the excavator main body 3 is mounted on the transport carriage 23 in a state where the excavator main body 3 is rotated in a prone direction and the second partition wall 7 is directed downward. It may be mounted on the transport carriage 23 in a state in which the second partition wall 7 is turned upward by turning in the direction.

トンネル掘削機の縦断側面図。A longitudinal side view of a tunnel excavator. 掘削機本体を伏臥させて搬送台車上に搭載する回収装置全体の簡略側面図。The simplified side view of the whole collection | recovery apparatus mounted on a conveyance trolley with the excavator main body lying down. その簡略正面図。The simplified front view. 掘削機本体を搬出している状態の簡略側面図。The simplified side view of the state which is carrying out the excavator main body. 搬送台車の平面図。The top view of a conveyance trolley. 送排泥管やエレクタ等を撤去した状態のトンネル掘削機の縦断側面図。A vertical side view of a tunnel excavator with a mud pipe and an erector removed. 掘削機本体を支持台上に引き込んだ状態の縦断側面図。The vertical side view of the state which pulled the excavator main body on the support stand. 掘削機本体を宙吊りにした状態の縦断側面図。The longitudinal side view of the state which suspended the excavator main body. その正面図。The front view. その背面図。The rear view. 掘削機本体を回転させている状態の縦断側面図。The vertical side view of the state which is rotating the excavator main body. 掘削機本体を略仰臥状態にまで回転させている状態の縦断側面図。The vertical side view of the state which is rotating the excavator main body to a substantially supine state. その正面図Front view その背面図。The rear view. 掘削機本体を仰臥状態にまで回転させた吊支状態の縦断側面図。The vertical side view of the suspended support state which rotated the excavator main body to the supine state. その正面図。The front view. 搬送台車を掘削機本体の下方にまで搬入する状態の縦断側面図。The vertical side view of the state which carries a conveyance trolley to the lower part of an excavator main body. 掘削機本体の搬出中の簡略正面図。The simplified front view in the middle of carrying out an excavator main body. 縮径状態のカッタ板部分を搬出する状態の縦断側面図。The longitudinal side view of the state which carries out the cutter board part of a diameter-reduced state. 縮径したカッタ板と掘削機本体とを一体に回収する状態の縦断側面図。The vertical side view of the state which collect | recovers the cutter board and excavator main body which were diameter-reduced integrally.

１外殻体
２第１隔壁
３掘削機本体
４カッタ板
５回転駆動手段
６内殻体
７第２隔壁
11 回転軸
20 軌条
21 支持台
22 姿勢変更手段
23 搬送台車
24 移載台
29 転倒防止バー DESCRIPTION OF SYMBOLS 1 Outer shell body 2 1st partition 3 Excavator main body 4 Cutter plate 5 Rotation drive means 6 Inner shell 7 Second partition
11 Rotation axis
20 rail
21 Support base
22 Posture change means
23 Transport cart
24 Transfer table
29 Fall prevention bar

Claims

The inner shell includes an outer shell having a ring-shaped first partition on the inner peripheral surface of the front end, and an inner shell supported in sliding contact with and supported by the first partition of the outer shell. of the excavator body and the second barrier rib formed by mounting the rotary drive means of the cutter plate on the back of the second partition wall provided integrally with the front end, and a rotatably supported cutter plate to the excavating machine body A method of recovering the excavator body through the inside of the tunnel after forming a predetermined length of the pipeline while excavating the tunnel in the ground with the tunnel excavator provided, after completion of the tunnel excavation of the predetermined length After cutting the cutter plate from the excavator body and pulling the excavator body from the first partition of the outer shell body into the rear part of the outer shell body , the excavator body is connected to the inner peripheral surface of the upper peripheral portion of the outer shell body. These one ropes are suspended through multiple wire ropes. The excavating machine body vertically rotated 90 degrees by extending and contracting operation, after accordingly, and the excavator body and the cutter plate backward by drivable conveyor means on rail which is previously laid on the conduit A method for collecting an excavator body in a tunnel excavator, wherein the excavator body is carried out.

The inner shell includes an outer shell having a ring-shaped first partition on the inner peripheral surface of the front end, and an inner shell supported in sliding contact with and supported by the first partition of the outer shell. An excavator main body in which a second partition wall is integrally provided at the front end of the main body and a cutter plate rotation driving means is mounted on the back surface of the second partition wall, and the diameter of the excavator body is rotatably supported by the excavator main body. A tunnel excavator comprising a cutter plate and a tunnel excavator having a predetermined length while excavating a tunnel in the ground, and then recovering the excavator body through the pipe, After the tunnel excavation is completed, the diameter of the cutter plate is reduced and drawn together with the excavator body from the first bulkhead of the outer shell body into the rear part of the outer shell body , and then the excavator body is attached to the outer shell body together with the reduced diameter cutter plate . Suspend and support these wires on the inner peripheral surface of the upper periphery via multiple wire ropes. The excavating machine body vertically rotated 90 degrees with diameter cutter plate by extending and contracting operation of Yaropu, accordingly after, rail to the excavator body with a reduced diameter cutter plate in advance laid the conduit A method for recovering an excavator body in a tunnel excavator, characterized in that the upper part is carried out rearward through a conveying means.