JP4818048B2

JP4818048B2 - Shield machine

Info

Publication number: JP4818048B2
Application number: JP2006270981A
Authority: JP
Inventors: 眞菊地; 雅春齋藤; 三夫千々岩
Original assignee: 鉄建建設株式会社
Priority date: 2006-10-02
Filing date: 2006-10-02
Publication date: 2011-11-16
Anticipated expiration: 2026-10-02
Also published as: JP2008088705A

Description

本発明は、例えばシールドトンネルの施工に好適で、セグメントに対するシールドジャッキの安定した反力を合理的かつ速やかに得られるとともに、シールドジャッキの煩雑な掛け替えを要することなく、セグメントの組み立てと、シールドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れるシールド掘進機に関する。 The present invention is suitable for construction of a shield tunnel, for example, and can stably and quickly obtain a stable reaction force of the shield jack with respect to the segment, and without requiring complicated replacement of the shield jack, performed without associated excavation simultaneously, speeding and its accuracy of construction, as well as Hakare streamlining assembly of segments for Resid Rudo excavator.

例えばシ−ルドは、一般に円筒状のスキンプレ−トと、該プレ−トに内蔵されたカッタ等の掘削設備と、シ−ルドジャッキ等の掘進設備と、エレクタ等の覆工設備等を備え、トンネルの施工時は、シ−ルドの前部で切羽を掘削し、所定量掘進後にシ−ルドの後部でセグメントを組み立て、その際バックリング防止上支障のない本数のシ−ルドジャッキを縮め、当該部にセグメントピ−スを既設のセグメントに取り付けて固定し、当該セグメントピ−スを組み立て後、前記シ−ルドジャッキを復旧してセグメントに押し当て、シ−ルドジャッキを掛け替えながらセグメントピ−スを順次組み立て、１リングを組み立て後、該セグメントにシ−ルドジャッキの反力をとってシ−ルドを掘進させ、この工程を繰り返してトンネルを築造していた。 For example, a shield generally includes a cylindrical skin plate, a drilling facility such as a cutter built in the plate, a drilling facility such as a shield jack, a lining facility such as an erector, and the like. At the time of construction, the face is excavated at the front of the shield, the segment is assembled at the rear of the shield after excavating a predetermined amount, and at that time, the number of shield jacks that do not hinder buckling is shortened, Attach and secure the segment piece to the existing segment.After assembling the segment piece, restore the shield jack and press it against the segment. After assembling one ring, a shield jack was applied to the segment to dig the shield, and this process was repeated to build a tunnel.

したがって、従来のシ−ル工法は、セグメントを１リング組み立て終えるまでは、シ−ルドを掘進することができず、その分施工に時間が掛かり、工費が嵩むとともに、シ−ルドジャッキの煩雑な掛け替えを要し、その掛け替え時にはシ−ルドが不安定になるという問題があった。 Therefore, in the conventional seal method, the shield cannot be dug until one ring of the segments is assembled, so that it takes time for the construction, and the construction cost increases, and the shield jack is complicatedly replaced. There is a problem that the shield becomes unstable when switching.

このような問題を解決するものとして、シ−ルド掘進機の後部に、シ−ルドジャッキの反力を受ける筒状の反力受け覆工体を設け、該反力受け覆工体の後方に中押し装置を設け、該中押し装置は後方で組み立てた一次覆工セグメントを中押しジャッキで押圧し、その反力で前記反力受け覆工体を推進し得るようにし、トンネル施工時は、シ−ルド掘進機の掘進中に中押し装置で一次覆工セグメントを組み立て、１リングの組み立て後、中押しジャッキを一斉に突出しシ−ルドジャッキを縮小して、シ−ルド掘進機の後部フレ−ムを１リング分推進し、掘進と一次覆工セグメントの組み立てを並行するようにしたものがある（例えば、特許文献１参照）。 In order to solve such a problem, a cylindrical reaction force receiving cover body that receives the reaction force of the shield jack is provided at the rear part of the shield machine, and the intermediate force is pushed behind the reaction force receiving cover body. The intermediate pushing device presses the primary lining segment assembled at the rear with an intermediate push jack so that the reaction force receiving lining body can be propelled by the reaction force. Assemble the primary lining segment with the center pushing device during the excavation of the machine, and after the assembly of the 1 ring, the middle push jack protrudes all at once and the shield jack is reduced to propel the rear frame of the shield excavator by one ring. However, there is one in which the excavation and the assembly of the primary lining segment are performed in parallel (for example, see Patent Document 1).

しかし、この従来のトンネルの施工法は、一次覆工体とは別個にシ−ルドジャッキの反力受け専用の反力受け覆工体を要するため、シ−ルドの長尺化と中押し装置の推進力の増加を招く一方、一次覆工セグメントの組み立てに時間が掛かり、中押し装置の作動時期がシ−ルド掘進機の掘進完了時よりかなり遅れてしまい、施工の高速化やセグメントの組み立ての合理化を図れなかった。 However, this conventional tunnel construction method requires a separate reaction force receiving lining body for receiving the reaction force of the shield jack separately from the primary lining body. While increasing the force, it takes time to assemble the primary lining segment, and the operation time of the center pusher is considerably delayed from the completion of the shield excavator's excavation, speeding up the construction and streamlining the segment assembly. I could n’t.

ところで、掘削と覆工の併進工法として、シ−ルド掘削機の後方で１リング分の内型枠を組み立て、その内型枠にフレッシュコンクリ−トを加圧して打設し、坑内面に覆工壁を形成するとともに、前記加圧によってフレッシュコンクリ−トを密実化し、前記コンクリ−トが硬化する前に、妻型枠にシ−ルドジャッキの反力をとり、シ−ルド掘削機を掘進するようにした、ＥＣＬ工法が知られている（例えば、特許文献２参照）。 By the way, as a parallel method of excavation and lining, an inner mold for one ring is assembled at the rear of the shield excavator, and a fresh concrete is pressed into the inner mold and driven to cover the inner surface of the mine. In addition to forming a work wall, the fresh concrete is solidified by the pressurization, and before the concrete hardens, the reaction force of the shield jack is applied to the wife formwork to advance the shield excavator. An ECL construction method is known (see, for example, Patent Document 2).

しかし、ＥＣＬ工法は、一次覆工を省略する分、コンクリ−トの巻き立て厚が厚く、また大掛かりなフレッシュコンクリ−トの打設設備や加圧設備と、多くの内型枠を要する上に、内型枠の組み立て中はシ−ルドを掘進することができず、その分施工の高速化を図れない等の問題があった。 However, the ECL method requires a large amount of freshly rolled concrete, a large amount of fresh concrete placement equipment and pressurization equipment, and a lot of inner formwork because the primary lining is omitted. However, the shield could not be excavated during the assembly of the inner mold, and there was a problem that the construction could not be speeded up.

このようなＥＣＬ工法の問題を解決するものとして、掘進機の後方にメインビ−ムを延設し、該メインビ−ムに摺動可能に嵌合して地山を押圧するグリッパと、掘進機とグリッパとの間に伸縮可能に介挿されたスラストシリンダと、メインビ−ムの後端に設けて地山を押圧するリアサポ−トと、前記グリッパと同動可能な内型枠と、コンクリ−トを注入可能なＭＴＬ注入システムとを備え、前記グリッパを地山に押圧して掘進機を掘進させ、この掘進中にコンクリ−トを注入して覆工し、グリッパの盛替え時はリアサポ−トを伸長してメインビ−ムを支持し、メインビ−ムを掘進方向へ移動する場合は、リアサポ−トを縮小させるようにしたものがある（例えば、特許文献３参照）。 In order to solve such problems of the ECL method, a gripper that extends a main beam behind the excavator, slidably fits the main beam, and presses a natural ground, and an excavator A thrust cylinder inserted in a telescopic manner between the gripper, a rear support provided at the rear end of the main beam to press the ground, an inner mold frame movable with the gripper, and a concrete An MTL injection system capable of injecting, and pressing the gripper against the ground to excavate the excavator, injecting concrete during the excavation and lining, and rear support when replacing the gripper When the main beam is moved by extending the main beam in the direction of excavation, the rear support is reduced (for example, see Patent Document 3).

しかし、前記工法は、コンクリ−トの注入時に掘削機を掘削位置へ移動し、コンクリ−トの養生時に掘削機を駆動して掘進させ、掘進後にグリッパを盛替えて内型枠を移動させているため、コンクリ−トの注入による覆工作業と、実質的な掘進とが別々に行なわれ、それらの施工の高速化を十分に図れず、しかも掘進時にはリアサポ−トを縮小し、グリッパのみで装置全体を支持するため、装置の安定性に欠けるとともに、内型枠の構成が複雑である等の問題があった。 However, the above construction method moves the excavator to the excavation position when injecting the concrete, drives the excavator to excavate when curing the concrete, changes the gripper after excavation, and moves the inner formwork. Therefore, the lining work by injecting concrete and the actual excavation are carried out separately, and the speed of the construction cannot be sufficiently increased, and the rear support is reduced during excavation, and only the gripper is used. Since the entire apparatus is supported, there are problems such as lack of stability of the apparatus and a complicated configuration of the inner mold.

特開平１１−１７３０７６号公報JP-A-11-173076 特開２００２−１９４９９７号公報JP 2002-194997 A 特開２００１−１５２７８７号公報JP 2001-152787 A

本発明はこのような問題を解決し、例えばシールドトンネルの施工に好適で、セグメントに対するシールドジャッキの安定した反力を合理的かつ速やかに得られるとともに、シールドジャッキの煩雑な掛け替えを要することなく、セグメントの組み立てとシールドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れるシールド掘進機を提供することを目的とする。 The present invention solves such problems, for example, suitable for construction of shield tunnels, can stably and quickly obtain a stable reaction force of the shield jack against the segment, without requiring a complicated replacement of the shield jack, It performed without associated simultaneously excavation of the assembly and the shield segment, and an object thereof is to provide faster construction and its accuracy, as well as the Cie Rudo excavator Hakare streamlining assembly of the segments.

請求項１の発明は、前胴を支持する支持枠と、後胴を支持する枠体との間に複数のシ−ルドジャッキを配置し、前記シ−ルドジャッキの伸縮動作を介して前胴と後胴とを近接離反動可能にするとともに、前記枠体の後方にセンタ−ビ−ムを突設し、該センタ−ビ−ムに一または複数の反力受を設け、該反力受の周面に複数の反力受ジャッキを設け、該反力受ジャッキの先端部のグリッパを覆工セグメントの内面に押圧可能に設け、前記シ−ルドジャッキに対する反力を形成可能にする一方、前記反力受の前端部にエレクタを設置し、該エレクタを介し覆工セグメントの前端部にセグメントピ−スを配置可能に設けるとともに、前記枠体に複数の組立用ジャッキを後方に突設し、該組立用ジャッキの後端部をセグメントピ−スの前面に押圧可能にしたシ−ルド掘進機において、前記支持枠より前方の前胴の周面に複数の地山反力グリッパを出没可能に設け、該グリッパを地山に押圧可能にするとともに、シ−ルドの掘進時に前記組立用ジャッキを縮小し、該組立用ジャッキと覆工セグメントの前端部との間にセグメントピ−スの１リング組み立て分の空スペ−スを形成可能にし、前記前胴の推進停止後、前記地山反力グリッパを伸長作動可能に設け、該地山反力グリッパを地山に押圧し前胴を定位置に保持可能にし、シ−ルドジャッキを直接、覆工体の前端面または覆工体の支持枠の前端面に押し当てて反力を形成する従来の手法を廃し、新設の覆工体の覆工や内型枠の継ぎ足しに係りなく、シ−ルドジャッキの反力を合理的に得られ、シ−ルドジャッキの作動に係りなく掘進可能にして、掘進と覆工の同時施工を実現可能にし、従来のシ−ルド工法やＥＣＬ工法を改善し得るとともに、シ−ルドジャッキの煩雑な掛け替えを要することなく、セグメントの組み立てとシ−ルドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れるようにしている。 According to the first aspect of the present invention , a plurality of shield jacks are disposed between a support frame that supports the front cylinder and a frame body that supports the rear cylinder, and the front cylinder and the rear are arranged through expansion and contraction of the shield jack. A center beam projecting from the rear of the frame, and one or more reaction force receivers are provided on the center beam, and the periphery of the reaction force receiver is provided. A plurality of reaction force receiving jacks are provided on the surface, and a gripper at the tip of the reaction force receiving jack is provided on the inner surface of the covering segment so as to be able to form a reaction force against the shield jack. An erector is installed at the front end of the receiver, and a segment piece can be arranged at the front end of the lining segment via the erector, and a plurality of assembly jacks are projected rearward from the frame body. The rear end of the jack for the machine can be pressed against the front of the segment piece In the shield excavator, a plurality of ground reaction force grippers are provided on the peripheral surface of the front torso in front of the support frame so as to be able to appear and disappear, and the grippers can be pressed against the ground, and the shield excavation is performed. Sometimes the assembly jack is reduced so that an empty space for one ring assembly of segment pieces can be formed between the assembly jack and the front end of the lining segment, and after the front cylinder has stopped propulsion. The natural ground reaction force gripper is provided so that it can be extended, the natural ground reaction force gripper is pressed against the natural ground so that the front torso can be held in place, and the shield jack is directly attached to the front end surface of the lining body or the covering. The conventional method of forming reaction force by pressing against the front end surface of the support frame of the body is abolished, and the reaction force of the shield jack is rational regardless of the lining of the new lining body and the addition of the inner formwork. Can be excavated regardless of the operation of the shield jack. Te enables realizing simultaneous construction of excavation and lining, conventional sheet - to improve field method and ECL method obtained Rutotomoni, shea - without requiring a complicated changeover of Rudojakki, the segment assembly and sheet - the shield The excavation can be carried out at the same time, making it possible to increase the speed and accuracy of construction and rationalize the assembly of the segments .

請求項２の発明は、前記組立用ジャッキを、１リング分のセグメントピ−スと同数設け、セグメントの組み立てとシ−ルドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れるようにしている。 According to the invention of claim 2, the number of the assembly jacks is equal to the number of segment pieces for one ring, the assembly of the segments and the shield excavation can be performed at the same time, and the speed of construction and its accuracy are improved. It is designed to streamline segment assembly .

請求項１の発明は、支持枠より前方の前胴の周面に複数の地山反力グリッパを出没可能に設け、該グリッパを地山に押圧可能にするとともに、シ−ルドの掘進時に前記組立用ジャッキを縮小し、該組立用ジャッキと覆工セグメントの前端部との間にセグメントピ−スの１リング組み立て分の空スペ−スを形成可能にし、前記前胴の推進停止後、前記地山反力グリッパを伸長作動可能に設け、該地山反力グリッパを地山に押圧し前胴を定位置に保持可能にしたから、シ−ルドジャッキを直接、覆工体の前端面または覆工体の支持枠の前端面に押し当てて反力を形成する従来の手法を廃し、新設の覆工体の覆工や内型枠の継ぎ足しに係りなく、シ−ルドジャッキの反力を合理的に得られ、シ−ルドジャッキの作動に係りなく掘進可能にして、掘進と覆工の同時施工を実現可能にし、従来のシ−ルド工法やＥＣＬ工法を改善し得るとともに、シ−ルドジャッキの煩雑な掛け替えを要することなく、セグメントの組み立てとシ−ルドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れる効果がある。 According to the first aspect of the present invention , a plurality of ground reaction force grippers are provided on the peripheral surface of the front trunk ahead of the support frame so as to be able to protrude and retract, and the grippers can be pressed against the ground, and when the shield is dug, The assembly jack is reduced, and an empty space for one ring assembly of the segment pieces can be formed between the assembly jack and the front end of the lining segment. Since the natural ground reaction force gripper is provided so that it can be extended, and the natural trunk reaction force gripper is pressed against the natural ground so that the front torso can be held at a fixed position, the shield jack can be directly connected to the front end surface or covering of the lining body. The conventional method of forming reaction force by pressing against the front end surface of the support frame of the body is abolished, and the reaction force of the shield jack is rational regardless of the lining of the new lining body and the addition of the inner formwork. Can be excavated regardless of the operation of the shield jack. Allowing realize simultaneous construction of lining, the conventional sheet - related excavation of field simultaneously - to improve field method and ECL method obtained Rutotomoni, shea - without requiring a complicated changeover of Rudojakki, assembly of the segment and Shi performed without speed and the accuracy of the construction, and the effect of Ru Hakare streamlining assembly of the segments.

請求項２の発明は、組立用ジャッキを、１リング分のセグメントピ−スと同数設けたから、セグメントの組み立てとシ−ルドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図ることができる。 In the invention of claim 2, since the number of assembling jacks is equal to the number of segment pieces for one ring, the assembly of the segments and the shield excavation can be performed at the same time, speeding up the construction and its accuracy, streamline segments assembly of can FIG Rukoto.

以下、本発明をシ−ルドトンネルの施工に適用した図示の実施形態について説明すると、図１乃至図５において１はシ−ルド掘進機で、周面に互いに蠕動可能な円筒状の前胴２と後胴３とが同軸上に配置され、それらの支持枠４と枠体５との間に、推進設備である複数のシ−ルドジャッキ６が配置され、その駆動ロッド７の伸縮作動を介して、前胴２と後胴３とを近接離反動可能に連結している。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to shield tunnel construction will be described below. In FIGS. 1 to 5, reference numeral 1 denotes a shield excavator, which is a cylindrical front barrel 2 which can be slidable on the peripheral surface. And the rear trunk 3 are arranged coaxially, and a plurality of shield jacks 6 as propulsion equipment are arranged between the support frame 4 and the frame body 5, and the drive rod 7 is extended and retracted The front cylinder 2 and the rear cylinder 3 are connected so as to be able to move close to and away from each other.

このうち、前記前胴２の周面に複数の地山反力グリッパ８が出没可能に配置され、該グリッパ８は後胴３を前胴２側へ引き寄せる際に外側へ突出し、地山９を押圧可能にしている。
前記後胴３の内側に枠体５を介して、後述する覆工体であるセグメントピ−スの組立用ジャッキ１０が複数配置され、その駆動ロッド１１を後方へ突出可能にしていて、該ロッド１１の伸縮変位を介して前記セグメントの端面を押圧可能にしている。 Among them, a plurality of ground reaction force grippers 8 are arranged on the peripheral surface of the front body 2 so as to be able to appear and retract. The grippers 8 protrude outward when the rear body 3 is drawn toward the front body 2, and It is possible to press.
A plurality of segment piece assembling jacks 10, which will be described later, are arranged on the inner side of the rear barrel 3 via a frame body 5, and the drive rod 11 can protrude rearward. The end face of the segment can be pressed through 11 expansion / contraction displacements.

前記枠体５の中央に管状のセンタ−ビ−ム１２が後方へ突設され、該ビ−ム１２の後端部周面に管状の反力受１３が複数配置され、各反力受１３の略等角度位置に複数の反力受ジャッキ１４が配置されている。
この場合、反力受１３は単一であっても良く、そのようにすることで部品点数の低減とセンタ−ビ−ム１２の小形軽量化を図れ、これを推進するシ−ルドジャッキ６または後述する長めのストロ−クの組立用ジャッキの小能力化を図れる。
なお、反力受ジャッキ１４を必ずしも等角度位置に配置する必要はないが、反力を安定かつ有効に伝達するためには、可及的に等角度位置に配置することが望ましい。 A tubular center beam 12 protrudes rearward from the center of the frame 5, and a plurality of tubular reaction force receivers 13 are arranged on the peripheral surface of the rear end of the beam 12. A plurality of reaction force receiving jacks 14 are arranged at substantially equiangular positions.
In this case, the reaction force receiver 13 may be single. By doing so, the number of parts can be reduced and the center beam 12 can be reduced in size and weight. This makes it possible to reduce the capacity of the long stroke assembly jack.
Note that the reaction force receiving jack 14 is not necessarily arranged at an equiangular position, but it is desirable to arrange the reaction force receiving jack 14 at an equiangular position as much as possible in order to transmit the reaction force stably and effectively.

前記反力受ジャッキ１４は図示のように斜め後方に立設して配置され、その駆動ロッド１５を伸縮可能にしていて、該ロッド１５の先端部に板状のグリッパ１６を回動可能に連結し、該グリッパ１６を組み立て後の既設の覆工体であるセグメント１７の内面に押圧可能にしている。 As shown in the figure, the reaction force receiving jack 14 is disposed upright and obliquely rearward, the drive rod 15 is extendable and contracted, and a plate-like gripper 16 is rotatably connected to the tip of the rod 15. The gripper 16 can be pressed against the inner surface of the segment 17 which is an existing lining body after assembly.

この場合、前記組立用ジャッキ１０と反力受ジャッキ１４は、１リング分のセグメント１７と同数設けることが望ましい。図中、１８は新設の覆工体であるセグメントピ−スである。
なお、セグメント１７ないしセグメントピ−ス１８の内面にグリッパ１６を固定または係合可能な溝ないし係合孔を設ければ、セグメント１７にグリッパ１６を安定して設置でき、確実かつ安定した反力を得られる。 In this case, it is desirable to provide the same number of assembling jacks 10 and reaction force receiving jacks 14 as there are segments 17 for one ring. In the figure, 18 is a segment piece which is a newly installed lining body.
In addition, if the groove | channel or engagement hole which can fix or engage the gripper 16 is provided in the inner surface of the segment 17 thru | or segment piece 18, the gripper 16 can be installed stably in the segment 17, and it is reliable and the stable reaction force Can be obtained.

前記センタ−ビ−ム１２の反力受１３と他側端部側に、覆工設備であるエレクタ１９が設けられ、該エレクタ１９は両端に伸縮可能なア−ム２０を備え、該ア−ム２０の先端にグリップ２１を備えていて、前記セグメントピ−ス１８を所定の組み立て位置へ保持し移動可能にしている。 The center beam 12 is provided with an erector 19 which is a lining equipment on the reaction force receiver 13 and the other end side of the center beam 12, and the erector 19 is provided with arm 20 which can be expanded and contracted at both ends. A grip 21 is provided at the tip of the head 20, and the segment piece 18 is held and moved to a predetermined assembly position.

一方、前記シ−ルド掘進機１の前端部に円板形のフェイスデスク２２が回転可能に設けられ、該デスク２２に掘削設備である複数のカッタ−ビット２３が突設して配置されている。
図中、２４は前胴２と後胴３の間に配置したシ−ルドラム、２５は後胴３の引き寄せ時に、枠体５と既設のセグメント１７の前端部との間に形成された空スペ−スで、セグメント１７の略１リング幅分に形成され、セグメントピ−ス１８の組み立て充当される。 On the other hand, a disk-shaped face desk 22 is rotatably provided at the front end portion of the shield machine 1, and a plurality of cutter bits 23, which are excavation equipment, are provided protruding from the desk 22. .
In the figure, 24 is a seal drum disposed between the front cylinder 2 and the rear cylinder 3, and 25 is an empty space formed between the frame 5 and the front end of the existing segment 17 when the rear cylinder 3 is drawn. -Then, the segment 17 is formed to be approximately one ring width, and the assembly of the segment piece 18 is applied.

このように構成したシ−ルド掘進機１は、従来と同様に前胴２に内蔵されたカッタ−ビット２３等の掘削設備と、シ−ルドジャッキ６等の掘進設備と、エレクタ１９等の覆工設備を備え、これに地山反力グリッパ８と組立用ジャッキ１０、センタ−ビ−ム１２と反力受ジャッキ１４とを有する。 The shield machine 1 configured as described above includes the excavation equipment such as the cutter bit 23 incorporated in the front barrel 2, the excavation equipment such as the shield jack 6, and the lining of the erector 19 and the like. A facility is provided with a ground reaction force gripper 8, an assembly jack 10, a center beam 12, and a reaction force receiving jack 14.

前記地山反力グリッパ８は公知のジャッキ部材を用いて前胴２に出没可能に設け、組立用ジャッキ１０は後胴３の内側の枠体５にセグメント１７に対向して設置し、センタ−ビ−ム１２は、例えば内部に掘削土砂の搬出装置を設備可能な管体を用いて枠体５に固定し、該センタ−ビ−ム１２の周面にセグメント１７の内面に向けて複数の反力受ジャッキ１４を配置して構成する。 The natural ground reaction force gripper 8 is provided so as to be able to appear and retract in the front barrel 2 using a known jack member, and the assembling jack 10 is installed on the inner frame 5 of the rear barrel 3 so as to face the segment 17. The beam 12 is fixed to the frame 5 using, for example, a pipe body that can be equipped with an excavating earth and sand carrying device, and a plurality of beams 12 are directed toward the inner surface of the segment 17 on the peripheral surface of the center beam 12. The reaction force receiving jack 14 is arranged and configured.

次に、このようなシ−ルド掘進機１を用いてシ−ルドトンネルを施工する場合は、従来と同様にシ−ルドの前部で切羽を掘削して掘進し、例えばセグメント１７の１リングの幅分、掘進後にシ−ルドの後部でセグメントピ−ス１８を組み立て、これを既設のセグメント１７に取り付けて固定し、セグメントピ−ス１８を１リングを組み立て後、シ−ルドを掘進し、以下この工程を繰り返してトンネルを築造する。 Next, when constructing a shield tunnel using such a shield excavator 1, the face is excavated by excavating the face at the front of the shield as in the prior art, for example, one ring of segment 17. After the excavation, the segment piece 18 is assembled at the rear part of the shield after the excavation, and this is attached and fixed to the existing segment 17, and after the segment piece 18 is assembled to one ring, the shield is excavated. Then, this process is repeated to build a tunnel.

このような施工において、シ−ルドの掘進時には、複数の反力受ジャッキ１４を一斉に伸長作動し、各グリッパ１６を既に組み立てたセグメント１７の内面に押し当てて、シ−ルドジャッキ６の反力を得ている。
すなわち、グリッパ１６をセグメント１７の内面に押し当てると、その抗力はセグメント１７およびグリッパ１６から、反力受ジャッキ１４を経て反力受１３ないしセンタ−ビ−ム１２に伝達され、該ビ−ム１２より枠体５ないし後胴３を経て、シ−ルドジャッキ６の反力を形成する。 In such construction, when the shield is dug, a plurality of reaction force receiving jacks 14 are simultaneously extended to press each gripper 16 against the inner surface of the already assembled segment 17, and the reaction force of the shield jack 6. Have gained.
That is, when the gripper 16 is pressed against the inner surface of the segment 17, the reaction force is transmitted from the segment 17 and the gripper 16 to the reaction force receiver 13 or the center beam 12 via the reaction force receiving jack 14. 12, the reaction force of the shield jack 6 is formed through the frame body 5 or the rear body 3.

その際、各グリッパ１６は図３のように、前記セグメント１７のリング内面の略等角度位置を押圧し、その抗力を駆動ロッド１５および反力受ジャッキ１４を介して、反力受１３およびセンタ−ビ−ム１２に斜め前方に作用し、これを有効に伝達するから、反力受１３ないしセンタ−ビ−ム１２がセンタリングされ、その水平姿勢を促すとともに、枠体５の垂直姿勢を促して、シ−ルドジャッキ６による水平方向の反力とその均等な反力を形成する。 At that time, as shown in FIG. 3, each gripper 16 presses a substantially equiangular position of the inner surface of the ring of the segment 17, and the reaction force is applied to the reaction force receiver 13 and the center via the drive rod 15 and the reaction force receiving jack 14. -Acts obliquely forward to the beam 12 and effectively transmits this, so that the reaction force receiver 13 or the center beam 12 is centered to promote its horizontal posture and the vertical posture of the frame 5 Thus, a horizontal reaction force by the shield jack 6 and an equal reaction force thereof are formed.

このような状況の下で地山反力グリッパ８を縮小作動し、地山９に対する押圧を解除して、シ−ルドジャッキ６を一斉に伸長作動する。
このようにすると、前胴２が切羽側へ推進し、これと前後してフェイスデスク２２を回転し、該デスク２２にカッタ−ビット２３を同動させて切羽を掘削し、シ−ルド掘進機１を掘進する。 Under such circumstances, the natural ground reaction force gripper 8 is contracted to release the pressure on the natural ground 9, and the shield jack 6 is extended all at once.
In this way, the front barrel 2 is propelled to the face side, and the face desk 22 is rotated back and forth, the cutter bit 23 is moved to the desk 22 and the face is excavated. Dig one.

そして、前記掘進開始後、ないし開始と同時にセグメントピ−ス１８の組み立てを開始する。
すなわち、前記シ−ルド掘進機１の掘進前は、組立用ジャッキ１０が駆動ロッド１１を縮小し、またシ−ルドジャッキ６が縮小作動し、枠体５を介し後胴３とセンタ−ビ−ム１２とが前胴２側へ引き寄せられ、枠体５の後方と既設のセグメント１７の前端部との間に、セグメント１７の１リング幅相当の空スペ−ス２５が形成されている。 Then, the assembly of the segment pieces 18 is started after the start of the excavation or at the same time as the start of the excavation.
In other words, before the shield machine 1 is dug, the assembly jack 10 reduces the drive rod 11 and the shield jack 6 operates to reduce, so that the rear cylinder 3 and the center beam are connected via the frame 5. 12, an empty space 25 corresponding to one ring width of the segment 17 is formed between the rear side of the frame 5 and the front end portion of the existing segment 17.

前記セグメントピ−ス１８を組み立てる場合は、前記空スペ−ス２５位置に臨むトンネルの底部に予めセグメントピ−ス１８を搬入して置き、該ピ−ス１８をエレクタ１９のグリップ２１に保持し、ア−ム２０を伸長して所定の組み立て位置へ移動し、既設のセグメント１７の前端部に固定して行なう。この状況は図１のようである。 When assembling the segment piece 18, the segment piece 18 is loaded and placed in advance at the bottom of the tunnel facing the empty space 25, and the piece 18 is held by the grip 21 of the erector 19. The arm 20 is extended, moved to a predetermined assembly position, and fixed to the front end of the existing segment 17. This situation is as shown in FIG.

このようなセグメントピ−ス１８の組み立て時には、前述のようにグリッパ１６を既設のセグメント１７の内面に押し当てて、シ−ルドジャッキ６の反力を得ており、従来のように組み立て直後のセグメントの前端面にシ−ルドジャッキを押し当てて反力を得る手法を採らないから、空スペ−ス２５の全域にセグメントピ−ス１８の組み立てスペ−スが確保されている。
したがって、従来のようなシ−ルドジャッキ６の煩雑な掛け替え作業を要せず、セグメントピ−ス１８の組み立てを容易かつ迅速に行なえる。
しかも、全てのシ−ルドジャッキ６に反力を確保して推進作動させられるから、推進作動の安定性と迅速性を得られる。 When the segment piece 18 is assembled, the gripper 16 is pressed against the inner surface of the existing segment 17 to obtain the reaction force of the shield jack 6 as described above. Since no method is used to obtain a reaction force by pressing a shield jack against the front end face of this, an assembly space for the segment pieces 18 is secured in the entire empty space 25.
Therefore, the segment piece 18 can be assembled easily and quickly without requiring the complicated replacement work of the shield jack 6 as in the prior art.
In addition, since all the shield jacks 6 can be propelled while ensuring a reaction force, the stability and speed of the propulsion operation can be obtained.

こうしてシ−ルド掘進機１を掘進し、その間セグメントピ−ス１８を順次組み立て、該組み立て後に組立用ジャッキ１０を伸長作動し、その駆動ロッド１１を組み立て後のセグメントピ−ス１８の前端面に押し当てて保持する。
そして、シ−ルドジャッキ６が所定変位伸長し、シ−ルドがセグメント１７の１リング幅分掘進し終えたところで、地山９の掘削を停止し、前胴２の推進を停止する。この状況は図２のようである。 In this way, the shield machine 1 is dug, while the segment pieces 18 are sequentially assembled, the assembly jack 10 is extended after the assembly, and the drive rod 11 is attached to the front end face of the assembled segment piece 18. Press and hold.
Then, when the shield jack 6 is extended by a predetermined displacement and the shield has finished digging by one ring width of the segment 17, the excavation of the natural ground 9 is stopped and the propulsion of the front trunk 2 is stopped. This situation is as shown in FIG.

この後、地山反力グリッパ８を伸長作動し、地山９を押圧して前胴２を定位置に保持するとともに、反力受ジャッキ１４を一斉に縮小作動し、セグメント１７の内面に対する各グリッパ１６の押圧力を解除して、前記グリッパ１６によるシ−ルドジャッキ６の反力を解消する。この状況は図５のようである。 Thereafter, the natural ground reaction force gripper 8 is extended to press the natural ground 9 to hold the front trunk 2 in a fixed position, and the reaction force receiving jacks 14 are simultaneously reduced to operate each of the inner surfaces of the segments 17. The pressing force of the gripper 16 is released, and the reaction force of the shield jack 6 by the gripper 16 is eliminated. This situation is as shown in FIG.

また、組立用ジャッキ１０を縮小作動し、その駆動ロッド１１をセグメントピ−ス１８から後退させるとともに、シ−ルドジャッキ６を縮小作動し、該ジャッキ６に連結した枠体５ないし後胴３を前胴２側に引き寄せ、これに枠体５に連結したセンタ−ビ−ム１２と反力受１３、および反力受ジャッキ１４とグリッパ１６とを同動させる。 Further, the assembly jack 10 is reduced and the drive rod 11 is retracted from the segment piece 18 and the shield jack 6 is reduced and the frame 5 or the rear barrel 3 connected to the jack 6 is moved forward. The center beam 12 and the reaction force receiver 13 connected to the frame body 5 and the reaction force receiving jack 14 and the gripper 16 are moved together by being drawn toward the body 2 side.

そして、シ−ルドジャッキ６を所定量縮小作動し、枠体５ないし後胴３を前胴２側へ十分引き寄せ、枠体５と既設のセグメント１７の前端部との間に空スペ−ス２５を形成するこの状況は図４のようである。 Then, the shield jack 6 is reduced by a predetermined amount, and the frame 5 or the rear cylinder 3 is sufficiently pulled toward the front cylinder 2, and an empty space 25 is formed between the frame 5 and the front end portion of the existing segment 17. This situation is as shown in FIG.

この後、反力受ジャッキ１４を伸長作動し、各グリッパ１６を既に組み立てたセグメント１７の内面に押し当て、前述のようにシ−ルドジャッキ６の反力を形成し、該ジャッキ６を推進し掘削を開始して、シ−ルドを掘進するとともに、前記形成した空スペ−ス２５にセグメントピ−ス１８を組み立てる。以後、前記工程を繰り返してシ−ルドトンネルを築造する。 Thereafter, the reaction force receiving jack 14 is extended and pressed, and each gripper 16 is pressed against the inner surface of the already assembled segment 17 to form the reaction force of the shield jack 6 as described above, and the jack 6 is propelled for excavation. Then, the shield is drilled and the segment piece 18 is assembled in the empty space 25 formed. Thereafter, the above process is repeated to build a shield tunnel.

なお、本発明のシ−ルドジャッキ６は、前胴２と後胴３の間に配置されているから、全てのシ−ルドジャッキ６に均等な推進力ないし反力を作用させると、シ−ルド掘進機１は直進し、一方、左右のシ−ルドジャッキ６の推進力ないし反力を相違させて作用させると、それらの伸長変位が相違して前胴２と後胴３が折れ曲がり、シ−ルド掘進機１が曲進する。
したがって、シ−ルドジャッキ６は中折れジャッキとして機能し、従来のように中折れジャッキを別設する必要がないから、その分構成が簡潔になる低廉に製作し得る。 Since the shield jack 6 of the present invention is disposed between the front cylinder 2 and the rear cylinder 3, if an equal propulsive force or reaction force is applied to all the shield jacks 6, the shield jacking is performed. The machine 1 goes straight, and on the other hand, if the left and right shield jacks 6 are operated with different thrusts or reaction forces, the front and rear cylinders 2 and 3 are bent due to their extension displacements being different, and the shield digging proceeds. Machine 1 turns.
Therefore, the shield jack 6 functions as a half-folded jack, and it is not necessary to separately provide a half-folded jack as in the prior art, so that the configuration can be simplified at a low cost.

このように本発明のシ−ルド掘進機１による施工は、セグメントピ−ス１８の組み立てとシ−ルド掘進機１の掘進とを、同時かつ関連なく行なえるから、トンネルの施工を合理的かつ能率良くしかも安全に行なえ、工期の短縮と工費の低減を図れる。 Thus, the construction by the shield machine 1 according to the present invention allows the assembly of the segment pieces 18 and the shield machine 1 to be carried out simultaneously and independently, so that the construction of the tunnel is rational and efficient. It is efficient and safe, shortening the construction period and reducing the construction cost.

図６乃至図８は本発明の応用形態を示し、前述の実施形態と対応する構成部分に同一の符号を用いている。
この応用形態はシ−ルド掘進機１の地山反力グリッパ８を省略し、代わりに組立用ジャッキ１０ａとその駆動ロッド１１ａを、前記組立用ジャッキ１０よりも伸縮変位が長めのものを使用している。したがって、前記グリッパ８の省略分、シ−ルド掘進機１の構成が簡潔になる。 6 to 8 show an application form of the present invention, and the same reference numerals are used for components corresponding to the above-described embodiment.
In this application mode, the ground reaction force gripper 8 of the shield machine 1 is omitted, and an assembly jack 10a and its drive rod 11a are used instead of the assembly jack 10 having a longer expansion and contraction displacement than the assembly jack 10. ing. Therefore, the configuration of the shield machine 1 is simplified because the gripper 8 is omitted.

そして、後胴３を前胴２側へ引き寄せる際、前述のように地山反力グリッパ８で地山９を押圧し、前胴２を固定する代わりに、シ−ルドジャッキ６の縮小作動に同調させて組立用ジャッキ１０ａを伸長作動し、後胴３を前胴２側へ推進し、これを前胴２へ押し当てるようにしている。したがって、組立用ジャッキ１０ａの伸長変位はシ−ルドジャッキ６の縮小変位よりも大きく設定している。 Then, when pulling the rear barrel 3 toward the front barrel 2 side, the ground pile 9 is pressed by the ground pile reaction force gripper 8 as described above, and instead of fixing the front barrel 2, it is synchronized with the reduction operation of the shield jack 6. Thus, the assembly jack 10a is extended to propel the rear cylinder 3 toward the front cylinder 2 and press it against the front cylinder 2. Therefore, the extension displacement of the assembling jack 10 a is set larger than the reduction displacement of the shield jack 6.

この応用形態における施工法は、後胴３を前胴２側へ引き寄せる工程を除いて、前述の実施形態と実質的に同一である。
すなわち、シ−ルドの掘進時には、複数の反力受ジャッキ１４を一斉に伸長作動し、各グリッパ１６を既に組み立てたセグメント１７の内面に押し当てて、シ−ルドジャッキ６の反力を形成する。 The construction method in this application form is substantially the same as that of the above-described embodiment except for the step of drawing the rear cylinder 3 toward the front cylinder 2 side.
That is, when the shield is dug, the plurality of reaction force receiving jacks 14 are simultaneously extended to press each gripper 16 against the inner surface of the already assembled segment 17 to form the reaction force of the shield jack 6.

その際、各グリッパ１６は図６のように、前記セグメント１７のリング内面の略等角度位置を押圧し、その抗力を駆動ロッド１５および反力受ジャッキ１４を介して、反力受１３およびセンタ−ビ−ム１２に斜め前方に作用し、これを有効に伝達しているから、反力受１３ないしセンタ−ビ−ム１２がセンタリングされ、その水平姿勢を促すとともに、枠体５の垂直姿勢を促して、シ−ルドジャッキ６による水平方向の反力とその均等な反力を形成する。 At this time, as shown in FIG. 6, each gripper 16 presses the substantially equiangular position of the inner surface of the ring of the segment 17, and the reaction force is applied to the reaction force receiver 13 and the center via the drive rod 15 and the reaction force receiving jack 14. Since it acts on the beam 12 obliquely forward and effectively transmits it, the reaction force receiver 13 or the center beam 12 is centered to promote its horizontal posture and the vertical posture of the frame 5 The horizontal reaction force by the shield jack 6 and its equal reaction force are formed.

このような状況の下でシ−ルドジャッキ６を一斉に伸長作動すると、前胴２が切羽側へ推進し、これと前後してフェイスデスク２２を回転し、該デスク２２にカッタ−ビット２３を同動させて切羽を掘削し、シ−ルド掘進機１を掘進する。
この場合、この応用形態では地山反力グリッパ８を省略しているから、前記掘進に際しての反力グリッパ８の縮小作動が省略され、その分作業が容易になる。 If the shield jacks 6 are extended all at once in such a situation, the front trunk 2 is propelled to the face side, and the face desk 22 is rotated around this, and the cutter bit 23 is attached to the desk 22. The face is excavated to move the shield machine 1.
In this case, since the ground reaction force gripper 8 is omitted in this application mode, the reduction operation of the reaction force gripper 8 at the time of excavation is omitted, and the work becomes easier correspondingly.

前記掘進開始後、ないし開始と同時にセグメントピ−ス１８の組み立てを開始する。
セグメントピ−ス１８の組み立ては前述の実施形態と同様で、グリッパ１６を既設のセグメント１７の内面に押し当てて、シ−ルドジャッキ６の反力を得ており、従来のように組み立て直後のセグメントの前端面にシ−ルドジャッキを押し当てて反力を得る手法を採らないから、空スペ−ス２５の全域にセグメントピ−ス１８の組み立てスペ−スが確保される。 After the start of excavation or as soon as the start, the assembly of the segment piece 18 is started.
The assembly of the segment piece 18 is the same as that of the above-described embodiment, and the reaction force of the shield jack 6 is obtained by pressing the gripper 16 against the inner surface of the existing segment 17, so Since no method is used to obtain a reaction force by pressing a shield jack against the front end surface of this, an assembly space for the segment space 18 is secured in the entire empty space 25.

したがって、従来のようなシ−ルドジャッキ６の煩雑な掛け替え作業を要せず、セグメントピ−ス１８の組み立てを容易かつ迅速に行なえる。
しかも、全てのシ−ルドジャッキ６に反力を確保して推進作動させられるから、推進作動の安定性と迅速性を得られる。その状況は図６のようである。 Therefore, the segment piece 18 can be assembled easily and quickly without requiring the complicated replacement work of the shield jack 6 as in the prior art.
In addition, since all the shield jacks 6 can be propelled while ensuring a reaction force, the stability and speed of the propulsion operation can be obtained. The situation is as shown in FIG.

こうしてシ−ルド掘進機１を掘進し、その間セグメントピ−ス１８を順次組み立て、その組み立て後に組立用ジャッキ１０ａを伸長作動し、その駆動ロッド１１ａを組み立て後のセグメントピ−ス１８の前端面に押し当てて保持する。
そして、シ−ルドジャッキ６が所定変位伸長し、シ−ルドがセグメント１７の１リング幅分掘進し終えたところで、地山９の掘削を停止し、前胴２の推進を停止する。この状況は図７のようである。 In this way, the shield machine 1 is dug, while the segment pieces 18 are sequentially assembled. After the assembly, the assembly jack 10a is extended, and the drive rod 11a is attached to the front end face of the assembled segment piece 18. Press and hold.
Then, when the shield jack 6 is extended by a predetermined displacement and the shield has finished digging by one ring width of the segment 17, the excavation of the natural ground 9 is stopped and the propulsion of the front trunk 2 is stopped. This situation is as shown in FIG.

この後、反力受ジャッキ１４を一斉に縮小作動し、セグメント１７の内面に対する各グリッパ１６の押圧力を解除して、前記グリッパ１６によるシ−ルドジャッキ６の反力を解消する。
この後、シ−ルドジャッキ６を縮小作動し、シ−ルドジャッキ６に連結した枠体５ないし後胴３を前胴２側へ引き寄せ、枠体５に連結したセンタ−ビ−ム１２と反力受１３、および反力受ジャッキ１４とグリッパ１６とを同動させる。 Thereafter, the reaction force receiving jacks 14 are simultaneously contracted to release the pressing force of each gripper 16 against the inner surface of the segment 17, and the reaction force of the shield jack 6 by the gripper 16 is eliminated.
Thereafter, the shield jack 6 is contracted, and the frame body 5 or the rear cylinder 3 connected to the shield jack 6 is drawn toward the front cylinder 2 side, and the reaction force and the center beam 12 connected to the frame body 5 are received. 13 and the reaction force receiving jack 14 and the gripper 16 are moved together.

そして、前記シ−ルドジャッキ６の作動に同調して、組立用ジャッキ１０ａを伸長作動し、その推力によって、前記枠体５ないし後胴３、センタ−ビ−ム１２、反力受１３等の前記移動を促し、後胴３を前胴２側へ押し当てて、前胴２を定位置に保持するとともに、枠体５と既設のセグメント１７の前端部との間に空スペ−ス２５を形成する。
このように組立用ジャッキ１０ａは、シ−ルドジャッキ６の牽引力を補完するとともに、緊急時には補助推進力としても利用し得る。この状況は図８のようである。 Then, in synchronism with the operation of the shield jack 6, the assembly jack 10a is extended, and by the thrust, the frame body 5 to the rear barrel 3, the center beam 12, the reaction force receiver 13, etc. Encourage the movement, press the rear cylinder 3 toward the front cylinder 2, hold the front cylinder 2 in a fixed position, and form an empty space 25 between the frame 5 and the front end of the existing segment 17. To do.
Thus, the assembling jack 10a can complement the traction force of the shield jack 6 and can also be used as an auxiliary propulsion force in an emergency. This situation is as shown in FIG.

したがって、この応用形態では後胴３の押し当て分、組立用ジャッキ１０ａの伸長ストロ−クを要し、また前述の実施形態のような地山反力グリッパ８の伸長作動の省略分、施工が簡潔になる。
この場合、組立用ジャッキ１０ａによる伸長作動は、セグメントピ−ス１８の組み立て後に行なわれるから、従来のシ−ルドジャッキ６のような掛け替えと相違し、セグメントピ−ス１８の組み立てに支障を来たさない。 Therefore, in this application form, the pressing portion of the rear barrel 3 and the extension stroke of the assembling jack 10a are required, and the extension operation of the ground reaction force gripper 8 as in the above-described embodiment is omitted. Be concise.
In this case, since the extension operation by the assembling jack 10a is performed after the assembly of the segment piece 18, the assembly of the segment piece 18 is hindered, unlike the conventional change of the shield jack 6. No.

この後、組立用ジャッキ１０ａを縮小作動し、その駆動ロッド１１ａをセグメントピ−ス１８から後退させ、シ−ルドの次期掘進と、セグメントピ−ス１８の次期組み立て態勢を形成する。 Thereafter, the assembly jack 10a is contracted and the drive rod 11a is retracted from the segment piece 18 to form the next drilling of the shield and the next assembly state of the segment piece 18.

なお、前述の実施形態では、本発明をシ−ルドトンネルの施工に適用しているが、その施工法であるＥＣＬ工法に本発明を適用することも可能である。
すなわち、ＥＣＬ工法における妻枠に対して、シ−ルドジャッキ６の反力を確保する代わりに、例えばフレッシュコンクリ−トを打設する内型枠の内面、または打設して硬化したコンクリ−トの覆工体の内面に前記グリッパ１６を設置することによって、容易かつ安定したシ−ルドジャッキ６の反力を確保し、内型枠の使用量の低減と、内型枠の煩雑な組み立てと分解の手間を軽減して、ＥＣＬ工法の施工の高速化と合理化を図るようにすることも可能である。 In the above-described embodiment, the present invention is applied to the construction of shield tunnels, but the present invention can also be applied to the ECL method that is the construction method.
That is, instead of securing the reaction force of the shield jack 6 against the wife frame in the ECL method, for example, the inner surface of the inner frame on which the fresh concrete is placed or the hardened concrete that is cast and hardened. By installing the gripper 16 on the inner surface of the lining body, an easy and stable reaction force of the shield jack 6 can be secured, the amount of use of the inner mold can be reduced, and complicated assembly and disassembly of the inner mold can be performed. It is also possible to reduce labor and speed up and rationalize the construction of the ECL method.

本発明のシ−ルド掘進機は以上のように、セグメントに対するシ−ルドジャッキの安定した反力を合理的かつ速やかに得られるとともに、シ−ルドジャッキの煩雑な掛け替えを要することなく、セグメントの組み立てとシ−ルドの掘進を同時に関連なく行なえ、施工の高速化とその正確性、並びにセグメントの組み立ての合理化を図れるから、例えばシ−ルドトンネルの施工に好適である。 As described above, the shield machine according to the present invention can obtain a stable reaction force of the shield jack against the segment reasonably and promptly, and can assemble the segment without requiring complicated replacement of the shield jack. It is suitable for the construction of shield tunnels, for example, because shield excavation can be performed at the same time, speeding up construction and its accuracy, and rationalizing the assembly of segments.

本発明をシ−ルドトンネルの施工に適用した断面図の要部で、地山反力グリッパを解除し、反力グリッパを既設のセグメントの内面に設置して、シ−ルドを掘進するとともに、セグメントの組み立てを開始している状況を示している。In the main part of the cross-sectional view where the present invention is applied to the construction of a shield tunnel, the natural ground reaction force gripper is released, the reaction force gripper is installed on the inner surface of the existing segment, and the shield is dug. It shows the status of starting assembly of segments. 前記シ−ルドの掘進終了と、セグメントの組み立て終了の状況の要部を示す断面図である。It is sectional drawing which shows the principal part of the situation of the completion | finish of digging of the said shield, and the completion | finish of assembly of a segment. 図１のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG.

前記シ−ルドの掘進終了後、地山反力グリッパを地山に押し当て、グリッパを既設セグメントの内面から解放するとともに、シ−ルドジャッキを縮めて、後胴を前胴側に引き寄せている状況の要部を示す断面図である。After the shield has been dug, the ground reaction force gripper is pressed against the ground, the gripper is released from the inner surface of the existing segment, the shield jack is shrunk, and the rear trunk is pulled toward the front trunk. It is sectional drawing which shows the principal part. 図４のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 本発明の応用形態の要部を示す断面図で、地山反力グリッパを省略し、長めのストロ−クの組立用ジャッキを使用しており、グリッパを既設のセグメントの内面に設置して、シ−ルドを掘進するとともに、セグメントの組み立てを開始している状況を示している。In the sectional view showing the main part of the application form of the present invention, the ground reaction force gripper is omitted, a long stroke assembly jack is used, and the gripper is installed on the inner surface of the existing segment. It shows the situation where the assembly of the segment is started while the shield is being drilled.

前記応用形態におけるシ−ルドの掘進終了と、セグメントの組み立て終了の状況の要部を示す断面図である。It is sectional drawing which shows the principal part of the situation of the completion | finish of shield excavation in the said application form, and the assembly completion of a segment. 前記応用形態におけるシ−ルドの掘進終了後、グリッパを既設セグメントの内面から解放するとともに、シ−ルドジャッキを縮め、更にセグメント組立ジャッキを伸長して、後胴を前胴側に押し当てている状況の要部を示す断面図である。After the shield has been dug in the application mode, the gripper is released from the inner surface of the existing segment, the shield jack is contracted, the segment assembly jack is further extended, and the rear cylinder is pressed against the front cylinder side. It is sectional drawing which shows the principal part.

Explanation of symbols

１シ−ルド掘進機
２前胴
３後胴
５枠体
６推進設備（シ−ルドジャッキ）
８地山反力グリッパ
９地山
１０組立用ジャッキ
１２センタ−ビ−ム
１４反力ジャッキ
１６グリッパ
１７覆工体（既設セグメント）
１８覆工体（セグメントピ−ス）
１９覆工設備（エレクタ）
２３掘削設備（カッタ−ビット） DESCRIPTION OF SYMBOLS 1 Shield machine 2 Front trunk 3 Rear trunk 5 Frame 6 Propulsion equipment (shield jack)
8 Ground mountain reaction force gripper 9 Ground mountain 10 Jack for assembly 12 Center beam 14 Reaction force jack 16 Gripper 17 Covered body (existing segment)
18 Lining body (segment piece)
19 Lining equipment (electa)
23 Drilling equipment (cutter bit)

Claims

A plurality of shield jacks are arranged between a support frame that supports the front trunk and a frame that supports the rear trunk, and the front trunk and the rear trunk can be moved close to and away from each other through the expansion and contraction of the shield jack. In addition, a center beam projects from the rear of the frame, and one or a plurality of reaction force receivers are provided on the center beam, and a plurality of reaction force receiving jacks are provided on the peripheral surface of the reaction force receiver. A gripper at the tip of the jack is provided on the inner surface of the lining segment so that it can be pressed, and a reaction force against the shield jack can be formed, while an erector is installed at the front end of the reaction force receiver, Shield excavation with a segment piece arranged at the front end of the segment so that it can be arranged, and a plurality of assembly jacks projecting rearward from the frame so that the rear end of the assembly jack can be pressed against the front of the segment piece A plurality of ground reaction force grippers are provided on the peripheral surface of the front torso in front of the support frame so that the grippers can be pushed into and out of the support body, and the assembly jacks are reduced when the shield is dug. An empty space for one ring assembly of the segment piece can be formed between the assembly jack and the front end portion of the lining segment, and the ground reaction force gripper can be extended after the front trunk is stopped. A shield machine which is provided and is capable of holding the front torso in a fixed position by pressing the ground reaction force gripper against the ground.

The shield machine according to claim 1 , wherein the number of the assembly jacks is the same as the number of segment pieces for one ring .