JP2009191547A

JP2009191547A - Joint structure of segment

Info

Publication number: JP2009191547A
Application number: JP2008034731A
Authority: JP
Inventors: Hirohide Hashimoto; 博英橋本; Susumu Okayama; 奨岡山; Takashi Kunito; 崇國藤
Original assignee: Ishikawajima Kenzai Kogyo Co Ltd; Ishikawajima Construction Materials Co Ltd
Current assignee: Ishikawajima Kenzai Kogyo Co Ltd; Ishikawajima Construction Materials Co Ltd
Priority date: 2008-02-15
Filing date: 2008-02-15
Publication date: 2009-08-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a segment capable of connecting the segments together with good accuracy by reducing the freedom of a male joint and a female joint to a low level. <P>SOLUTION: The male joint 6 comprises: a plurality of rod bodies 13a, 14a which are protruded outward from a contact end face 1c of one of the segments 4, and arranged side by side in a direction S that slides both the contact end faces 1c, 1d on each other; engaging portions 13b, 14b which are arranged at distal ends of the rod bodies 13a, 14a, respectively; an abutting plate 15 which allows the rod bodies 13a, 14a to insert in the insertion holes formed therein to be connected to the rod bodies 13a, 14a; and elastic bodies 18, 19 which are interposed between the engaging portions 13b, 14b and the abutting plate 15, respectively. The female joint 7 is provided with an engaging plate 25 which extends from one end 25a to the other end 25b thereof, and has a notch 26 into which the rod bodies 13a, 14a can be fitted sideways. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、シールド工法等により掘削したトンネル内面に設置されて覆工を形成するセグメント同士を一体に接合するための継手構造に関する。 The present invention relates to a joint structure for integrally joining segments that are installed on an inner surface of a tunnel excavated by a shield method or the like and form a cover.

従来、シールド工法等により掘削したトンネル内面には、この掘削内面の曲率半径と略同等の曲率半径を備えた複数の円弧盤状のセグメントが周方向に連続して設けられ、周方向の掘削内面を被覆して支持する環状のセグメントリング体が形成される。そして、このような周方向の掘削内面を支持するセグメントリング体がトンネル軸方向に連続するように接続されて、掘削内面を被覆支持するトンネルの覆工が形成される。また、この種のセグメントには、周方向に隣り合うセグメント同士を接合するための継手構造（ピース間継手）と、トンネル軸方向に隣り合うセグメント同士を接合するための継手構造（リング間継手）とが設けられている。 Conventionally, the inner surface of a tunnel excavated by a shield method or the like is provided with a plurality of arcuate disk-like segments having a curvature radius substantially equal to the curvature radius of the inner surface of the excavation in the circumferential direction. An annular segment ring body that covers and supports is formed. The segment ring bodies that support the inner surface of the excavation in the circumferential direction are connected so as to be continuous in the tunnel axis direction, and a tunnel lining that covers and supports the inner surface of the excavation is formed. In addition, this type of segment has a joint structure (joint piece joint) for joining adjacent segments in the circumferential direction and a joint structure (joint ring joint) for joining adjacent segments in the tunnel axis direction. And are provided.

また、継手構造（ピース間継手）には、特許文献１に開示されるように、一対のセグメントの互いの接合端面同士の対向位置に設けられた一対の雄継手と雌継手を、接合端面同士を対向させてスライドさせるとともに接合させるように構成したものがある。 Moreover, as disclosed in Patent Document 1, a joint structure (piece-to-piece joint) includes a pair of male joints and female joints provided at positions opposed to each other of a pair of segments. Some of them are configured to slide while being opposed to each other.

さらに、この継手構造において、雄継手は、略中心に孔部を有するベース板と、ベース板の裏面側に固定した袋ナットと、ベース板の表面側から孔部を介して袋ナットに締結し、ヘッド側が接合端面から外側に突出した状態で固設された１本のボルトと、ボルトのヘッド（係止部）の底部側に設けられた皿バネ（弾性体）とを備えて構成されている。また、雌継手は、一端から他端側に向けて延びる切欠部が形成された係止板を備えて構成されている。 Furthermore, in this joint structure, the male joint is fastened to the cap nut through the hole from the front side of the base plate, the base plate having a hole at the substantially center, the cap nut fixed to the back side of the base plate. And a single bolt fixed in a state where the head side protrudes outward from the joint end face, and a disc spring (elastic body) provided on the bottom side of the head (locking portion) of the bolt. Yes. The female joint includes a locking plate having a notch extending from one end toward the other end.

そして、この継手構造においては、一対のセグメントを互いの接合端面同士を対向させ一方のセグメントをスライドさせるとともに、雌継手の係止板の切欠部に雄継手のボルト（軸部、棒体）が嵌め込まれ、ボルトのヘッドと係止板の間に配された皿バネの弾性力によって雄継手と雌継手が互いに引き寄せられて接合する。このように継手構造の雄継手と雌継手が接合することにより、セグメント同士が互いの接合端面同士を強固に圧接した状態で接合される。
特許第３５１６８０２号公報 In this joint structure, the pair of segments face each other with their joining end faces facing each other, and one segment is slid, and a male joint bolt (shaft, rod) is formed in the notch of the female joint locking plate. The male joint and the female joint are attracted to each other and joined by the elastic force of the disc spring that is fitted and arranged between the head of the bolt and the locking plate. Thus, by joining the male joint and female joint of the joint structure, the segments are joined in a state where the joint end faces are firmly pressed against each other.
Japanese Patent No. 3516802

しかしながら、上記の特許文献１に開示された継手構造においては、雄継手の１本のボルトを雌継手の係止板の切欠部に嵌め込んで接合するため、係止板と係止板の切欠部に嵌め込んだボルトの自由度が高く、組み立て誤差が出やすい。このため、セグメント同士を所定の位置で精度よく接合することができない場合があった。 However, in the joint structure disclosed in Patent Document 1 above, since one bolt of the male joint is fitted and joined to the notch portion of the locking plate of the female joint, the notch between the locking plate and the locking plate is used. There is a high degree of freedom for the bolts fitted in the part, and assembly errors are likely to occur. For this reason, there was a case where the segments could not be accurately joined at a predetermined position.

本発明は、上記事情に鑑み、雄継手と雌継手の自由度を低く抑えて、セグメント同士を精度よく接合させることが可能なセグメントの継手構造を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide a joint structure of segments capable of joining segments with high accuracy while suppressing the degree of freedom of a male joint and a female joint.

上記の目的を達するために、この発明は以下の手段を提供している。 In order to achieve the above object, the present invention provides the following means.

本発明のセグメントの継手構造は、一対のセグメントの互いの接合端面同士を対向させてスライドさせることにより、前記一対のセグメントを接合させるセグメントの継手構造であって、一方のセグメントに設けられた雄継手と他方のセグメントに設けられた雌継手とからなり、前記雄継手は、前記一方のセグメントの接合端面から外側に突出し、前記接合端面同士をスライドさせる方向に並設された複数の棒体と、前記棒体よりも大径に形成され、前記複数の棒体のそれぞれの先端部に設けられた係止部と、挿通孔に前記複数の棒体を挿通させて前記複数の棒体に連設された当接板とを備え、前記雌継手は、一端から他端側に向けて延び、前記複数の棒体が側方から嵌合可能に形成された切欠部を有する係止板を備えており、前記接合端面同士をスライドさせるとともに、前記係止板が前記当接板に当接し、前記複数の棒体の前記一方のセグメントの接合端面と前記当接板の間に位置する部分が前記切欠部に嵌め込まれるように構成されていることを特徴とする。 The segment joint structure of the present invention is a segment joint structure in which the pair of segments are joined by sliding the joint end faces of the pair of segments facing each other, and the male joint provided in one segment A joint and a female joint provided on the other segment, wherein the male joint protrudes outward from the joining end face of the one segment, and a plurality of rods arranged in parallel in a direction to slide the joining end faces The rods are formed with a diameter larger than that of the rods, and are engaged with the plurality of rods by inserting the plurality of rods through insertion holes and engaging portions provided at the tip ends of the rods. The female joint includes a locking plate that extends from one end toward the other end and has a notch formed so that the plurality of rods can be fitted from the side. The joint end face And the locking plate is in contact with the contact plate, and the portion located between the joining end surface of the one segment of the plurality of rods and the contact plate is fitted into the notch. It is configured.

この発明においては、一対のセグメントの互いの接合端面同士を対向させてスライドさせるとともに、複数の棒体が係止板の切欠部に嵌め込まれる。このとき、係止板が当接して当接板が係止部側に押圧され、これとともに雄継手と雌継手が互いに引き寄せられるように接合し、セグメント同士が互いの接合端面同士を強固に圧接した状態で接合される。 In the present invention, the joint end faces of the pair of segments face each other and slide, and a plurality of rods are fitted into the notches of the locking plate. At this time, the locking plate abuts and the abutting plate is pressed toward the locking portion, and the male joint and the female joint are joined so as to be attracted to each other. Are joined together.

そして、このように接合した状態で、並設した複数の棒体が係止板の切欠部に嵌め込まれているため、従来の１本のボルト（棒体）に係止板の切欠部を嵌め込んで接合するものと比較し、棒体と係止板の自由度を低く抑えることが可能になる。さらに、このとき、係止板が当接板に圧接されているため、この当接板を介して繋がる係止板と複数の棒体の自由度を、当接板を設けることで吸収しさらに低くすることが可能になる。これにより、雄継手と雌継手（複数の棒体と係止板）を安定した状態で接合することが可能になる。 And in the state joined in this way, since the several bar | burr arranged side by side is engage | inserted by the notch part of the latching plate, the notch part of the latching plate is fitted to one conventional volt | bolt (bar body). It is possible to keep the degree of freedom of the rod body and the locking plate low compared to those that are joined together. Further, at this time, since the locking plate is pressed against the contact plate, the degree of freedom of the lock plate and the plurality of rods connected through the contact plate is absorbed by providing the contact plate. It becomes possible to lower. Thereby, it becomes possible to join a male joint and a female joint (a plurality of rod bodies and a locking plate) in a stable state.

また、本発明のセグメントの継手構造において、前記当接板は、前記接合端面同士をスライドさせて前記切欠部に最初に嵌め込まれる前記棒体側の先端の幅が、後端側の幅よりも小さく形成されていることが望ましい。 Moreover, in the joint structure of the segment of the present invention, the contact plate is configured such that the tip end on the rod body side that is first fitted into the notch by sliding the joining end faces is smaller than the width on the rear end side. It is desirable that it be formed.

この発明においては、当接板を設け、複数の棒体の一方のセグメントの接合端面と当接板との間に位置する部分が係止板の切欠部に嵌め込まれるように構成した場合においても、当接板の先端の幅が小さく形成されていることにより、接合端面同士をスライドさせて係止板の切欠部に最初に嵌め込まれる棒体を容易に係止板の切欠部に嵌め込むことができ、雄継手と雌継手ひいてはセグメント同士を容易に接合することが可能になる。 In the present invention, even when a contact plate is provided and a portion located between the joint end surface of one segment of the plurality of rods and the contact plate is fitted into the notch portion of the locking plate, By making the width of the tip of the contact plate small, it is possible to easily fit the rod body that is first fitted in the notch portion of the locking plate into the notch portion of the locking plate by sliding the joining end surfaces together The male joint and the female joint, and thus the segments can be easily joined.

さらに、本発明のセグメントの継手構造において、前記雄継手は、前記係止部と前記当接板の間に介装された弾性体を備えていることがより望ましい。 Furthermore, in the segment joint structure of the present invention, it is more desirable that the male joint includes an elastic body interposed between the locking portion and the contact plate.

この発明においては、一対のセグメントの互いの接合端面同士を対向させてスライドさせて、複数の棒体を係止板の切欠部に嵌め込み、係止板が当接して当接板が係止部側に押圧される際に、この係止部と当接板の間に弾性体が介装されていることによって、この弾性体の弾性力で確実に雄継手と雌継手を互いに引き寄せて接合することが可能になる。これにより、セグメント同士が互いの接合端面同士を強固に圧接した状態で確実に接合される。また、係止板がこの弾性体の弾性力によって当接板に確実に圧接されるため、当接板を介して繋がる係止板と複数の棒体の自由度を、確実に吸収し低くすることが可能になる。よって、雄継手と雌継手（複数の棒体と係止板）を安定した状態で確実に接合することが可能になる。 In this invention, the joint end surfaces of the pair of segments are slid opposite to each other, and a plurality of rods are fitted into the notches of the locking plate, the locking plate comes into contact, and the contact plate becomes the locking portion. When pressed to the side, an elastic body is interposed between the engaging portion and the contact plate, so that the male joint and the female joint can be reliably pulled and joined together by the elastic force of the elastic body. It becomes possible. Accordingly, the segments are reliably bonded in a state where the bonding end surfaces are firmly pressed against each other. Further, since the locking plate is reliably pressed against the contact plate by the elastic force of the elastic body, the degree of freedom of the lock plate and the plurality of rods connected via the contact plate is reliably absorbed and lowered. It becomes possible. Therefore, it becomes possible to reliably join the male joint and the female joint (the plurality of rod bodies and the locking plate) in a stable state.

本発明のセグメントの継手構造によれば、雄継手が複数の棒体とこれら棒体に連設した当接板とを備えることで、確実に係止板と複数の棒体の自由度を低く抑えることが可能になり、雄継手と雌継手（複数の棒体と係止板）を安定した状態で接合することが可能になる。これにより、従来のように組み立て誤差が生じることはなく、セグメント同士を所定の位置で精度よく接合することが可能になる。 According to the joint structure of a segment of the present invention, the male joint includes a plurality of rod bodies and a contact plate connected to the rod bodies, thereby reliably reducing the degree of freedom of the locking plate and the plurality of rod bodies. It becomes possible to suppress, and it becomes possible to join a male joint and a female joint (a plurality of rods and a locking plate) in a stable state. Thus, an assembly error does not occur as in the conventional case, and the segments can be accurately joined at a predetermined position.

以下、図１から図８を参照し、本発明の一実施形態に係るセグメントの継手構造について説明する。本実施形態は、シールド工法等により掘削したトンネル内面に隣り合って設置される一対のセグメントを一体に接合するための継手構造に関し、特に一対のセグメントの互いの接合端面同士を対向させてスライドさせることにより、一対のセグメントを一体に接合させるピース間継手の構造に関するものである。 A segment joint structure according to an embodiment of the present invention will be described below with reference to FIGS. The present embodiment relates to a joint structure for integrally joining a pair of segments installed adjacent to an inner surface of a tunnel excavated by a shield method or the like, and in particular, slides the joint end surfaces of the pair of segments facing each other. Thus, the present invention relates to a structure of an inter-piece joint that integrally joins a pair of segments.

はじめに、本実施形態のセグメント１は、コンクリート製セグメントであり、図１に示すように、シールドマシンによって掘削したトンネルＴの掘削内面の曲率半径と略同等の曲率半径を備える円弧盤状に形成されている。また、このセグメント１は、平面視方形状で、周方向の周長が軸Ｏ１方向の幅Ｍよりも大きく形成されるとともに、径方向の厚さが周方向に沿って一定に形成されている。そして、このように形成された複数のセグメント１は、トンネルＴの掘削内面に沿ってトンネルＴの周方向に連続して設けられ、周方向の掘削内面を被覆しつつ支持する環状のセグメントリング体２を形成する。また、トンネルＴの軸線Ｏ２方向に、セグメントリング体２が連続するように設けられて、シールドマシンで掘削した掘削内面が複数のセグメント１で被覆されつつ支持される。 First, the segment 1 of this embodiment is a concrete segment, and as shown in FIG. 1, is formed in an arcuate disk shape having a curvature radius substantially equal to the curvature radius of the inner surface of the tunnel T excavated by a shield machine. ing. Further, the segment 1 has a rectangular shape in plan view, and the circumferential length in the circumferential direction is larger than the width M in the direction of the axis O1, and the thickness in the radial direction is constant along the circumferential direction. . The plurality of segments 1 formed in this way are continuously provided in the circumferential direction of the tunnel T along the excavation inner surface of the tunnel T, and are annular segment ring bodies that support the circumferential excavation inner surface while covering them. 2 is formed. Further, the segment ring body 2 is provided so as to be continuous in the direction of the axis O2 of the tunnel T, and the inner surface of the excavation excavated by the shield machine is supported while being covered with the plurality of segments 1.

ここで、トンネルＴの軸線Ｏ２方向に隣り合うセグメント１同士は、軸線Ｏ２方向に対向する接合端面１ａ同士が、それぞれの接合端面１ａのセグメント１の厚さ方向（径方向）略中央に設けられ、かつ周方向に所定の間隔をもって複数設けられたリング間継手３によって接合される。また、トンネルＴの周方向に隣り合うセグメント１（４、５）同士は、周方向に対向する接合端面１ｂ（１ｃ、１ｄ）同士が、それぞれの接合端面１ｂのセグメント１の幅Ｍ方向（軸線Ｏ２方向）の両端側にそれぞれ設けられたピース間継手Ａによって接合される。そして、本実施形態においては、ピース間継手に本発明に係るセグメントの継手構造Ａが用いられている。 Here, as for the segments 1 adjacent to each other in the axis O2 direction of the tunnel T, the joining end faces 1a facing each other in the axis O2 direction are provided in the center of the thickness direction (radial direction) of the segment 1 of each joining end face 1a. And a plurality of inter-ring joints 3 provided at a predetermined interval in the circumferential direction. Further, the segments 1 (4, 5) adjacent to each other in the circumferential direction of the tunnel T are connected to each other in the circumferential direction and the joining end surfaces 1b (1c, 1d) are in the width M direction (axis line) of the segments 1 of the respective joining end surfaces 1b. O2 direction) are joined by piece-to-piece joints A provided at both ends. And in this embodiment, the joint structure A of the segment which concerns on this invention is used for the joint between pieces.

このセグメントの継手構造Ａは、図１及び図２に示すように、互いに接合される一方のセグメント４（５）と他方のセグメント５（４）の接合端面１ｂ（１ｃ、１ｄ）同士の対向位置にそれぞれ設けられた雄継手６と雌継手７とによって構成されている。また、本実施形態において、一方のセグメント４（５）には、図１に示すように、接合端面１ｃの幅Ｍ方向一端側に雄継手６が、他端側に雌継手７がそれぞれ設けられ、他方のセグメント５（４）には、接合端面１ｄの幅Ｍ方向一端側に一方のセグメント４（５）の雄継手６と接合する雌継手７が、他端側に一方のセグメント４（５）の雌継手７と接合する雄継手６がそれぞれ設けられている。 As shown in FIGS. 1 and 2, the joint structure A of this segment is a position where the joining end faces 1b (1c, 1d) of one segment 4 (5) and the other segment 5 (4) are joined to each other. The male joint 6 and the female joint 7 are provided respectively. In the present embodiment, as shown in FIG. 1, one segment 4 (5) is provided with a male joint 6 on one end side in the width M direction of the joining end face 1c and a female joint 7 on the other end side. The other segment 5 (4) has a female joint 7 joined to the male joint 6 of one segment 4 (5) on one end side in the width M direction of the joining end face 1d, and one segment 4 (5) on the other end side. ) Of the female joint 7 is provided.

ここで、以下の説明においては、一方のセグメント４（１）の一端側と他方のセグメント５（１）の一端側とにそれぞれ設けられた一対の雄継手６と雌継手７からなる継手構造Ａを基にして説明を行うこととする。 Here, in the following description, a joint structure A including a pair of male joints 6 and female joints 7 provided on one end side of one segment 4 (1) and one end side of the other segment 5 (1), respectively. The explanation will be based on the above.

本実施形態の雄継手６は、図２、図３及び図５に示すように、ベース板１０と、２つの袋ナット１１、１２と、２本のボルト（複数の棒体と係止部）１３、１４と、当接板１５と、２つのスペーサ１６、１７と、皿バネなどの鋼製バネ（弾性体）１８、１９とが主な構成要素とされている。 As shown in FIGS. 2, 3 and 5, the male joint 6 of the present embodiment includes a base plate 10, two cap nuts 11 and 12, and two bolts (a plurality of rod bodies and locking portions). 13, 14, the contact plate 15, the two spacers 16 and 17, and steel springs (elastic bodies) 18 and 19 such as disc springs are main components.

ベース板１０は、矩形板状に形成され、一面（表面）から他面（裏面）に貫通し間隔をあけて並設された２つの孔部１０ａ、１０ｂを備えて形成されている。そして、このベース板１０は、その表面を一方のセグメント４（１）の接合端面１ｃ（１ｂ）から外側に露出させるようにして、接合端面１ｃ（１ｂ）に沿って配設されている。また、このベース板１０の裏面に、各孔部１０ａ、１０ｂと連通するように２つの袋ナット１１、１２がそれぞれ固設され、さらにこの裏面に一端を接続して一方のセグメント４（１）の内側に延びる一対の側板２０、２１が固設されている。また、各側板２０、２１には、一方のセグメント４（１）の内側に延びる複数のアンカー２２が溶接などで取り付けられており、これらアンカー２２が一方のセグメント４（１）のコンクリートに定着していることによって、ベース板１０は一方のセグメント４（１）に強固に一体化されている。 The base plate 10 is formed in a rectangular plate shape, and includes two holes 10a and 10b that pass through from one surface (front surface) to the other surface (back surface) and are arranged in parallel with an interval. And this base board 10 is arrange | positioned along the joining end surface 1c (1b) so that the surface may be exposed outside from the joining end surface 1c (1b) of one segment 4 (1). In addition, two cap nuts 11 and 12 are fixed to the back surface of the base plate 10 so as to communicate with the holes 10a and 10b, respectively, and one end 4 is connected to the back surface to connect one segment 4 (1). A pair of side plates 20 and 21 extending inward are fixedly provided. Further, a plurality of anchors 22 extending inside the one segment 4 (1) are attached to each side plate 20, 21 by welding or the like, and these anchors 22 are fixed to the concrete of the one segment 4 (1). As a result, the base plate 10 is firmly integrated with the one segment 4 (1).

２本のボルト１３、１４は、図３及び図５に示すように、それぞれベース板１０の表面側から軸部（棒体）１３ａ、１４ａを孔部１０ａ、１０ｂに挿通し袋ナット１１、１２に螺着させて、先端部のヘッド（棒体１３ａ、１４ａよりも大径に形成された係止部１３ｂ、１４ｂ）側が接合端面１ｃ（１ｂ）から外側に突出した状態で固設されている。また、これら２本のボルト１３、１４は、互いの軸線を平行に配し、一方のセグメント４（１）の接合端面１ｃ（１ｂ）と他方のセグメント５（１）の接合端面１ｄ（１ｂ）とをスライドさせる方向Ｓに並設されている。 As shown in FIGS. 3 and 5, the two bolts 13, 14 are respectively inserted through the shaft portions (rod bodies) 13 a, 14 a from the surface side of the base plate 10 into the holes 10 a, 10 b, and the cap nuts 11, 12. The heads (the locking portions 13b and 14b formed larger in diameter than the rod bodies 13a and 14a) are fixed in a state of protruding outward from the joint end surface 1c (1b). . The two bolts 13 and 14 are arranged such that their axes are parallel to each other, and the joining end face 1c (1b) of one segment 4 (1) and the joining end face 1d (1b) of the other segment 5 (1). Are arranged side by side in the direction S for sliding.

さらに、このように固設した２本のボルト１３、１４に当接板１５が連設されている。当接板１５は、略矩形板状に形成され、一面から他面に貫通して並設された２つの挿通孔１５ａ、１５ｂを備えて形成されている。そして、この当接板１５は、２つの挿通孔１５ａ、１５ｂにそれぞれ軸部１３ａ、１４ａが挿通することにより２本のボルト１３、１４に連設されている。 Further, a contact plate 15 is connected to the two bolts 13 and 14 fixed in this way. The contact plate 15 is formed in a substantially rectangular plate shape, and is provided with two insertion holes 15 a and 15 b that are arranged side by side from one surface to the other surface. The contact plate 15 is connected to the two bolts 13 and 14 by inserting the shaft portions 13a and 14a into the two insertion holes 15a and 15b, respectively.

また、本実施形態において、この当接板１５は、接合端面１ｃ（１ｂ）に対し、前記スライド方向Ｓ前方側の先端から後方側の後端に向かうに従い漸次接合端面１ｃ（１ｂ）側に近づくように所定の角度で斜設されている。さらに、本実施形態の当接板１５は、先端から後端に向かうに従い漸次その幅が小となるようにテーパー状に形成されている。すなわち、この当接板１５は、先端の幅が後端の幅よりも小さく（先細に）形成されている。 In the present embodiment, the contact plate 15 gradually approaches the joining end surface 1c (1b) toward the joining end surface 1c (1b) as it goes from the front end on the sliding direction S toward the rear end on the rear side. As shown in FIG. Further, the contact plate 15 of the present embodiment is formed in a tapered shape so that the width gradually decreases from the front end toward the rear end. That is, the contact plate 15 is formed such that the width of the front end is smaller (tapered) than the width of the rear end.

スペーサ１６、１７は、筒状に形成され、その内孔に２本のボルト１３、１４の各軸部１３ａ、１４ａを挿通させた状態で当接板１５とベース板１０の間に設けられている。そして、これらスペーサ１６、１７は、雄継手６と雌継手７を接合する前の状態において、端部に当接板１５が当接してこれを支持し、２本のボルト１３、１４の軸線方向の所定位置で当接板１５を保持している。また、本実施形態においては、前記スライド方向Ｓ前方側に配された一方のボルト１３の軸部１３ａが挿通する一方のスペーサ１６は、他方のボルト１４の軸部１４ａが挿通する他方のスペーサ１７よりも長く形成されている。これにより、これらスペーサ１６、１７が支持する当接板１５が所定の角度で斜設されている。 The spacers 16 and 17 are formed in a cylindrical shape, and are provided between the contact plate 15 and the base plate 10 with the shaft portions 13a and 14a of the two bolts 13 and 14 being inserted into the inner holes thereof. Yes. The spacers 16 and 17 are in a state before the male joint 6 and the female joint 7 are joined. The abutting plate 15 abuts against and supports the end portions, and the axial direction of the two bolts 13 and 14 is supported. The contact plate 15 is held at a predetermined position. Further, in the present embodiment, one spacer 16 through which the shaft portion 13a of one bolt 13 arranged on the front side in the sliding direction S is inserted is the other spacer 17 through which the shaft portion 14a of the other bolt 14 is inserted. It is formed longer than. Accordingly, the contact plate 15 supported by the spacers 16 and 17 is obliquely provided at a predetermined angle.

鋼製バネ（弾性体）１８、１９は、２本のボルト１３、１４の各ヘッド（係止部）１３ｂ、１４ｂと当接板１５の間に介装されており、ヘッド１３、１４の底部と当接板１５の一面に当接した状態で設けられている。これにより、当接板１５は、鋼製バネ１８、１９の弾性力（付勢力）によって一方のセグメント４（１）の接合端面１ｃ（１ｂ）側に付勢されるとともにスペーサ１６、１７の端部に当接して、ボルト１３、１４の軸線方向に進退自在に保持されている。 Steel springs (elastic bodies) 18, 19 are interposed between the heads (locking portions) 13 b, 14 b of the two bolts 13, 14 and the contact plate 15. And in contact with one surface of the contact plate 15. As a result, the contact plate 15 is urged toward the joining end face 1c (1b) of the one segment 4 (1) by the elastic force (biasing force) of the steel springs 18 and 19, and the ends of the spacers 16 and 17 are urged. It is held in contact with the portion so as to be able to advance and retract in the axial direction of the bolts 13 and 14.

一方、他方のセグメント５（１）の接合端面１ｄ（１ｂ）に設けられた雌継手７は、図２、図４及び図５に示すように、略矩形板状の係止板２５が主な構成要素とされている。 On the other hand, the female joint 7 provided on the joining end surface 1d (1b) of the other segment 5 (1) is mainly a substantially rectangular plate-shaped locking plate 25, as shown in FIGS. It is a component.

係止板２５は、先端２５ａから後端２５ｂ（一端から他端）に向けて延び、雄継手の２本のボルト１３、１４の軸部１３ａ、１４ａ（本実施形態においては各軸部１３ａ、１４ａが挿通するスペーサ１６、１７を含む）が側方から嵌合可能に形成された切欠部２６を備えて形成されている。また、本実施形態において、この係止板２５は、裏面の先端２５ａ側に先端２５ａから後端２５ｂ側に向かうに従い漸次係止板２５の厚さが大となるように形成されたテーパー部２７が設けられている。 The locking plate 25 extends from the front end 25a toward the rear end 25b (from one end to the other end), and the shaft portions 13a and 14a of the two bolts 13 and 14 of the male joint (in the present embodiment, each shaft portion 13a, 14a includes spacers 16 and 17), and is formed with a notch 26 formed so as to be fitted from the side. Further, in the present embodiment, the locking plate 25 has a tapered portion 27 formed so that the thickness of the locking plate 25 gradually increases toward the rear end 25b side from the front end 25a toward the front end 25a side of the back surface. Is provided.

さらに、係止板２５には、後端２５ｂ側の裏面に一端を接続して他方のセグメント５（１）の内側に延びる一対の側板２８、２９が固設され、これら一対の側板２８、２９が底板３０によって繋げられている。また、各側板２８、２９には、他方のセグメント５（１）の内側に延びるアンカー３１が溶接などで取り付けられており、これらアンカー３１が他方のセグメント５（１）のコンクリートに定着していることによって、係止板２５は他方のセグメント５（１）に強固に一体化されている。 Further, the locking plate 25 is fixedly provided with a pair of side plates 28 and 29 which are connected to the back surface on the rear end 25b side and extend inside the other segment 5 (1). Are connected by a bottom plate 30. Moreover, the anchor 31 extended inside the other segment 5 (1) is attached to each side plate 28 and 29 by welding etc., and these anchors 31 are fixed to the concrete of the other segment 5 (1). As a result, the locking plate 25 is firmly integrated with the other segment 5 (1).

さらに、このとき、係止板２５は、他方のセグメント５（１）の幅Ｍ方向（前記スライド方向Ｓ）に沿うように、且つ先端２５ａを他方のセグメント５（１）の幅Ｍ方向一端側に向けて、他方のセグメント５（１）の接合端面１ｄ（１ｂ）に形成された凹部３２に収容して設けられ、接合端面１ｄ（１ｂ）から他方のセグメント５（１）の内側の所定位置に配設されている。 Further, at this time, the locking plate 25 extends along the width M direction (the slide direction S) of the other segment 5 (1), and the tip 25a is on one end side in the width M direction of the other segment 5 (1). Toward the other end of the segment 5 (1) from the joint end surface 1d (1b) and provided in the recess 32 formed on the joint end surface 1d (1b) of the other segment 5 (1). It is arranged.

また、本実施形態においては、この係止板２５が、先端２５ａから後端２５ｂに向かうに従い漸次接合端面１ｄ（１ｂ）から離れるように（先端２５ａから後端２５ｂに向かうに従い漸次他方のセグメント５（１）の内側に配されるように）、雄継手６の当接板１５の傾斜角度に応じた所定の角度で斜設されている。 Further, in the present embodiment, the other segment 5 gradually moves away from the joining end surface 1d (1b) as the locking plate 25 moves from the front end 25a toward the rear end 25b (from the front end 25a toward the rear end 25b). (As arranged on the inner side of (1)), the male joint 6 is inclined at a predetermined angle corresponding to the inclination angle of the contact plate 15.

ついで、上記の構成からなるセグメントの継手構造Ａによって一対のセグメント４、５（１）を接合する方法を説明するとともに、本実施形態のセグメントの継手構造Ａの作用及び効果について説明する。 Next, a method of joining the pair of segments 4 and 5 (1) with the segment joint structure A having the above-described configuration will be described, and the operation and effect of the segment joint structure A of the present embodiment will be described.

一対のセグメント４、５（１）を接合する際には、図６に示すように、はじめに、一対のセグメント４、５（１）の互いの接合端面１ｃ、１ｄ（１ｂ）同士を対向させるとともに、一方のセグメント４（１）の接合端面１ｃ（１ｂ）から外側に突出している雄継手６の２本のボルト１３、１４を、他方のセグメント５（１）の接合端面１ｄ（１ｂ）に形成された凹部３２内に挿入する。 When joining the pair of segments 4, 5 (1), as shown in FIG. 6, first, the joining end faces 1c, 1d (1b) of the pair of segments 4, 5 (1) are opposed to each other. The two bolts 13 and 14 of the male joint 6 projecting outward from the joining end face 1c (1b) of one segment 4 (1) are formed on the joining end face 1d (1b) of the other segment 5 (1). Into the recessed portion 32 formed.

ついで、互いの接合端面１ｃ、１ｄ（１ｂ）同士をスライドさせることにより、図７に示すように、雄継手６の所定位置に配された当接板１５の先端が雌継手７の所定位置に配された係止板２５の先端２５ａのテーパー部２７に当接し、このテーパー部２７によって当接板１５の先端側が円滑に一方のボルト１３のヘッド１３ｂ側に押圧されて移動する。そして、係止板２５の切欠部２６に一方のボルト１３の一方のセグメント４（１）の接合端面１ｃ（１ｂ）と当接板１５の間に位置する軸部１３ａがスペーサ１６とともに嵌め込まれてゆく。 Next, by sliding the joint end faces 1c and 1d (1b) from each other, the tip of the contact plate 15 arranged at a predetermined position of the male joint 6 is brought to a predetermined position of the female joint 7 as shown in FIG. The tapered plate 27 abuts on the tapered portion 27 of the distal end 25 a of the arranged locking plate 25, and the tapered portion 27 smoothly moves the distal end side of the abutting plate 15 to the head 13 b side of one bolt 13. Then, a shaft portion 13 a located between the joining end surface 1 c (1 b) of one segment 4 (1) of one bolt 13 and the contact plate 15 is fitted together with the spacer 16 in the notch portion 26 of the locking plate 25. go.

このとき、本実施形態においては、当接板１５がその先端の幅を小さくして形成されているため、接合端面１ｃ、１ｄ（１ｂ）同士をスライドさせた際に、係止板２５の切欠部２６に最初に嵌め込まれる一方のボルト１３の軸部１３ａ（スペーサ１６）が、容易に係止板２５の切欠部２６に嵌め込まれる。 At this time, in the present embodiment, the contact plate 15 is formed with a reduced width at the tip thereof, so that when the joining end surfaces 1c and 1d (1b) are slid, the notch of the locking plate 25 is cut. The shaft portion 13 a (spacer 16) of one bolt 13 that is first fitted into the portion 26 is easily fitted into the notch portion 26 of the locking plate 25.

そして、さらにスライドさせると、図８に示すように、互いに所定の角度で斜設された係止板２５と当接板１５が当接して面接触しつつ、他方のボルト１４の一方のセグメント４（１）の接合端面１ｃ（１ｂ）と当接板１５の間に位置する軸部１４ａがスペーサ１７とともに係止板２５の切欠部２６に嵌め込まれる。 Then, when further slid, as shown in FIG. 8, the locking plate 25 and the contact plate 15 that are obliquely arranged at a predetermined angle contact each other and come into surface contact, while one segment 4 of the other bolt 14 is in contact. The shaft portion 14 a located between the joining end surface 1 c (1 b) of (1) and the contact plate 15 is fitted into the notch portion 26 of the locking plate 25 together with the spacer 17.

このとき、係止板２５と当接板１５が当接することで所定のスライド方向Ｓに案内され、確実に係止板２５の切欠部２６に他方のボルト１４の軸部１４ａが嵌め込まれる。また、他方のボルト１４の軸部１４ａが切欠部２６に嵌め込まれることで、さらにスライドさせた際には、当接板１５と２本のボルト１３、１４の軸部１３ａ、１４ａによって所定のスライド方向Ｓに案内されて所定の位置に導かれる。 At this time, the locking plate 25 and the contact plate 15 are brought into contact with each other to be guided in a predetermined sliding direction S, and the shaft portion 14a of the other bolt 14 is securely fitted into the notch 26 of the locking plate 25. Further, when the shaft portion 14a of the other bolt 14 is fitted into the notch portion 26, when the slide is further slid, a predetermined slide is caused by the contact plate 15 and the shaft portions 13a and 14a of the two bolts 13 and 14. Guided in the direction S and guided to a predetermined position.

このように２本のボルト１３、１４の軸部１３ａ、１４ａが切欠部２６に嵌め込まれるとともに、係止板２５により当接板１５がボルト１３、１４のヘッド１３ｂ、１４ｂ側に押圧されて移動するため、各ヘッド１３ｂ、１４ｂと当接板１５の間に介装された鋼製バネ１８、１９が弾性変形する。これにより、これら鋼製バネ１８、１９の弾性力で雄継手６と雌継手７とが互いに引き寄せられ、雄継手６と雌継手７が接合するとともに、一対のセグメント４、５（１）が互いの接合端面１ｃ、１ｄ（１ｂ）同士を強固に圧接した状態で接合される。 In this way, the shaft portions 13a and 14a of the two bolts 13 and 14 are fitted into the notches 26, and the contact plate 15 is pressed by the locking plate 25 toward the heads 13b and 14b of the bolts 13 and 14 and moved. Therefore, the steel springs 18 and 19 interposed between the heads 13b and 14b and the contact plate 15 are elastically deformed. Thereby, the male joint 6 and the female joint 7 are attracted to each other by the elastic force of the steel springs 18 and 19, the male joint 6 and the female joint 7 are joined, and the pair of segments 4, 5 (1) are mutually connected. The joining end faces 1c and 1d (1b) are joined in a state where they are firmly pressed together.

そして、本実施形態のセグメントの継手構造Ａにおいては、一対のセグメント４、５（１）を接合した状態で、並設した２本のボルト１３、１４の軸部１３ａ、１４ａが係止板２５の切欠部２６に嵌め込まれているため、従来の１本のボルト（棒体）に係止板の切欠部を嵌め込んで接合するものと比較し、ボルト１３、１４と係止板２５の自由度を低く抑えることが可能になる。さらに、このとき、係止板２５が鋼製バネ１８、１９の弾性力によって当接板１５に圧接されることになるため、この当接板１５を介して繋がる係止板２５と２本のボルト１３、１４の自由度を、当接板１５を設けることで吸収しさらに低く抑えることが可能になる。 And in the joint structure A of the segment of this embodiment, the shaft parts 13a and 14a of the two bolts 13 and 14 arranged in parallel in the state which joined a pair of segments 4 and 5 (1) are the latching plates 25. Therefore, the bolts 13 and 14 and the locking plate 25 can be freely connected as compared with a conventional bolt (rod body) in which the notch portion of the locking plate is fitted and joined. The degree can be kept low. Further, at this time, since the locking plate 25 is pressed against the contact plate 15 by the elastic force of the steel springs 18 and 19, the locking plate 25 connected via the contact plate 15 and the two plates are connected. The degree of freedom of the bolts 13 and 14 can be absorbed and further reduced by providing the contact plate 15.

したがって、本実施形態のセグメントの継手構造Ａによれば、雄継手６が２本のボルト１３、１４とこれらボルト１３、１４に連設した当接板１５とを備えることで、確実に係止板２５と２本のボルト１３、１４の自由度を低く抑えることができるため、雄継手６と雌継手７を安定した状態で接合することが可能になる。よって、従来のように組み立て誤差が生じることがなく、セグメント４、５（１）同士を所定の位置で精度よく接合することが可能になる。 Therefore, according to the joint structure A of the segment of the present embodiment, the male joint 6 includes the two bolts 13 and 14 and the contact plate 15 connected to the bolts 13 and 14, so that it can be reliably locked. Since the freedom degree of the board 25 and the two bolts 13 and 14 can be suppressed low, it becomes possible to join the male joint 6 and the female joint 7 in a stable state. Therefore, an assembly error does not occur unlike the conventional case, and the segments 4 and 5 (1) can be accurately joined at a predetermined position.

また、本実施形態のセグメントの継手構造Ａにおいては、当接板１５を設け、２本のボルト１３、１４の一方のセグメント４（１）の接合端面１ｃ（１ｂ）と当接板１５との間に位置する部分が係止板２５の切欠部２６に嵌め込まれるように構成した場合においても、当接板１５の先端の幅が小さく形成されていることにより、接合端面１ｃ、１ｄ（１ｂ）同士をスライドさせて係止板２５の切欠部２６に最初に嵌め込まれる一方のボルト１３の軸部１３ａを容易に切欠部２６に嵌め込むことができ、雄継手６と雌継手７ひいてはセグメント４、５（１）同士を容易に接合することが可能になる。 Further, in the segment joint structure A of the present embodiment, a contact plate 15 is provided, and the connection end surface 1c (1b) of one segment 4 (1) of the two bolts 13 and 14 and the contact plate 15 are provided. Even in the case where the portion positioned therebetween is fitted into the notch 26 of the locking plate 25, the joining end surfaces 1c, 1d (1b) are formed by the small width of the tip of the contact plate 15. The shaft portion 13a of one bolt 13 that is first fitted into the notch portion 26 of the locking plate 25 by sliding them can be easily fitted into the notch portion 26, and the male joint 6 and the female joint 7 and thus the segment 4, 5 (1) can be easily joined to each other.

なお、本発明は、上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。例えば、本実施形態では、セグメントの継手構造Ａがコンクリート製セグメントに具備されているものとしたが、本発明に係るセグメントの継手構造は、鋼製枠にコンクリートを充填してなるコンクリート中詰セグメントなどに用いてもよい。そして、例えばコンクリート中詰セグメントに採用した場合には、鋼製枠の主桁でセグメント同士の接合力を確実に且つ効果的に受けることができるように、雄継手６と雌継手７をそれぞれセグメントの幅Ｍ方向の主桁に近づけて、本実施形態よりもさらに両端側に配設することが好ましい。 In addition, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in this embodiment, the joint structure A of the segment is provided in the concrete segment, but the joint structure of the segment according to the present invention is a concrete filling segment formed by filling a steel frame with concrete. You may use for. For example, when employed in a concrete filling segment, the male joint 6 and the female joint 7 are respectively segmented so that the joining force between the segments can be reliably and effectively received by the main girder of the steel frame. It is preferable to dispose them closer to the main girder in the width M direction than in this embodiment.

また、本実施形態では、雄継手６の当接板１５が、略矩形板状に形成され、接合端面１ｃ（１ｂ）に対して、スライド方向Ｓ前方側の先端から後方側の後端に向かうに従い漸次接合端面１ｃ（１ｂ）側に近づくように所定の角度で斜設され、さらに、雌継手７の係止板２５が、略矩形板状に形成され、先端２５ａから後端２５ｂに向かうに従い漸次接合端面１ｄ（１ｂ）から離れるように、雄継手６の当接板１５の傾斜角度に応じた所定の角度で斜設されているものとして説明を行った。 In the present embodiment, the contact plate 15 of the male joint 6 is formed in a substantially rectangular plate shape, and is directed from the front end on the sliding direction S toward the rear end on the rear side with respect to the joining end surface 1c (1b). Are gradually inclined at a predetermined angle so as to approach the side of the joining end surface 1c (1b), and the locking plate 25 of the female joint 7 is formed in a substantially rectangular plate shape, and as it moves from the front end 25a toward the rear end 25b. The description has been given on the assumption that it is inclined at a predetermined angle corresponding to the inclination angle of the contact plate 15 of the male joint 6 so as to gradually move away from the end face 1d (1b).

これに対し、本発明に係るセグメントの継手構造においては、例えば図９及び図１０に示すように、当接板１５と係止板２５の互いに当接して面接触するそれぞれの裏面を傾斜面とし、当接板１５と係止板２５がそれぞれ先端から後端に向かうに従い漸次その幅が大となるように形成されていてもよい。この場合には、スライドさせて２本のボルト１３、１４の軸部１３ａ、１４ａを切欠部２６に嵌め込んだ際に、傾斜した裏面同士が当接して面接触することで、順次係止板２５によって当接板１５がボルト１３、１４のヘッド１３ｂ、１４ｂ側に押圧されて移動する。このため、２本のボルト１３、１４の軸部１３ａ、１４ａを切欠部２６に嵌め込んでゆくとともに、雄継手６と雌継手７とが互いに引き寄せられてゆき、当接板１５の接合端面１ｃ、１ｄ（１ｂ）に沿う表面が各ヘッド１３ｂ、１４ｂに押圧されて、雄継手６と雌継手７が接合する。これにより、当接板１５と各ヘッド１３ｂ、１４ｂとの間に鋼製バネ（弾性体）１８、１９を介装することなく（例えば図９及び図１０に示すようにワッシャ３３を介装したり、何も介装することなく）、雄継手６と雌継手７を接合でき、一対のセグメント４、５（１）を互いの接合端面１ｃ、１ｄ（１ｂ）同士を強固に圧接した状態で接合することが可能になる。 On the other hand, in the segment joint structure according to the present invention, as shown in FIGS. 9 and 10, for example, the back surfaces of the contact plate 15 and the locking plate 25 that are in contact with each other and in surface contact are inclined surfaces. The contact plate 15 and the locking plate 25 may be formed so that the width gradually increases from the front end toward the rear end. In this case, when the shaft portions 13a and 14a of the two bolts 13 and 14 are fitted into the notch portion 26 by sliding, the inclined back surfaces come into contact with each other and come into surface contact with each other, so that the locking plates are sequentially provided. 25, the contact plate 15 is pressed against the heads 13 b and 14 b of the bolts 13 and 14 and moved. For this reason, the shaft portions 13a and 14a of the two bolts 13 and 14 are fitted into the notch portion 26, and the male joint 6 and the female joint 7 are attracted to each other. The surface along 1d (1b) is pressed by the heads 13b and 14b, and the male joint 6 and the female joint 7 are joined. Thus, the steel springs (elastic bodies) 18 and 19 are not interposed between the contact plate 15 and the heads 13b and 14b (for example, the washer 33 is interposed as shown in FIGS. 9 and 10). Without any intervention), the male joint 6 and the female joint 7 can be joined, and the pair of segments 4, 5 (1) are in a state where the joint end faces 1c, 1d (1b) are firmly pressed against each other. It becomes possible to join.

また、本実施形態では、雄継手６や雌継手７が、２本のボルト１３、１４、係止板２５などをセグメント４、５（１）に一体化させるための側板２０、２１、２８、２９、アンカー２２、３１などを備えて構成されるとしたが、本発明のセグメントの継手構造においては、雄継手が少なくとも複数の棒体と係止部と当接板とを備え、雌継手が少なくとも切欠部を有する係止板を備えていればよく、セグメントと一体化させるための手段は特に限定を必要とするものではなく、適宜手段を採用すればよい。 In the present embodiment, the male joint 6 and the female joint 7 are side plates 20, 21, 28, for integrating the two bolts 13, 14, the locking plate 25 and the like into the segments 4, 5 (1). 29, the anchors 22, 31 and the like. In the joint structure of the segment of the present invention, the male joint includes at least a plurality of rod bodies, a locking portion, and a contact plate, and the female joint includes It is only necessary to have a locking plate having at least a notch, and means for integrating with the segment is not particularly limited, and means may be adopted as appropriate.

さらに、本実施形態では、雄継手６が２本のボルト（棒体）１３、１４を備えて構成されるものとして説明を行ったが、本発明に係る棒体は、３本以上であってもよい。 Further, in the present embodiment, the male joint 6 has been described as including two bolts (rod bodies) 13 and 14, but the number of the rod bodies according to the present invention is three or more. Also good.

本発明の一実施形態に係るセグメントをトンネル内に設置した状態を示す斜視図である。It is a perspective view which shows the state which installed the segment which concerns on one Embodiment of this invention in the tunnel. 本発明の一実施形態に係るセグメントの継手構造を示す斜視図である。It is a perspective view which shows the joint structure of the segment which concerns on one Embodiment of this invention. 本発明の一実施形態に係るセグメントの継手構造の雄継手を示す断面図である。It is sectional drawing which shows the male joint of the joint structure of the segment which concerns on one Embodiment of this invention. 本発明の一実施形態に係るセグメントの継手構造の雌継手を示す断面図である。It is sectional drawing which shows the female joint of the joint structure of the segment which concerns on one Embodiment of this invention. 本発明の一実施形態に係るセグメントの継手構造を示す斜視図である。It is a perspective view which shows the joint structure of the segment which concerns on one Embodiment of this invention. 本発明の一実施形態に係るセグメントの継手構造でセグメント同士を接合する方法を説明するための図であり、雄継手をセグメントの凹部内に挿入した状態を示す図である。It is a figure for demonstrating the method to join segments with the joint structure of the segment which concerns on one Embodiment of this invention, and is a figure which shows the state which inserted the male joint in the recessed part of a segment. 本発明の一実施形態に係るセグメントの継手構造でセグメント同士を接合する方法を説明するための図であり、接合端面同士をスライドさせて係止板の切欠部に一方のボルト（棒体）を嵌め込んだ状態を示す図である。It is a figure for demonstrating the method to join segments with the joint structure of the segment which concerns on one Embodiment of this invention, slides joining end surfaces and attaches one volt | bolt (rod) to the notch part of a locking plate. It is a figure which shows the state fitted. 本発明の一実施形態に係るセグメントの継手構造でセグメント同士を接合する方法を説明するための図であり、接合端面同士をスライドさせて係止板の切欠部に２本のボルト（複数の棒体）を嵌め込んで、雄継手と雌継手を接合した状態を示す図である。It is a figure for demonstrating the method to join segments by the joint structure of the segment which concerns on one Embodiment of this invention, and slides joint end surfaces, Two bolts (Plural rods) in the notch part of a locking plate It is a figure which shows the state which inserted the body) and joined the male joint and the female joint. 本発明の一実施形態に係るセグメントの継手構造の変形例を示す図であり、接合端面同士をスライドさせて係止板の切欠部に一方のボルト（棒体）を嵌め込んだ状態を示す図である。It is a figure which shows the modification of the joint structure of the segment which concerns on one Embodiment of this invention, and is a figure which shows the state which slid | joined joining end surfaces and fitted one bolt (rod) in the notch part of the locking plate It is. 本発明の一実施形態に係るセグメントの継手構造の変形例を示す図であり、接合端面同士をスライドさせて係止板の切欠部に２本のボルト（複数の棒体）を嵌め込んで、雄継手と雌継手を接合した状態を示す図である。It is a figure which shows the modification of the joint structure of the segment which concerns on one Embodiment of this invention, slid | joins joining end surfaces, and fits two bolts (plural rods) in the notch part of a locking plate, It is a figure which shows the state which joined the male joint and the female joint.

Explanation of symbols

１セグメント
１ｂ接合端面
１ｃ一方のセグメントの接合端面
１ｄ他方のセグメントの接合端面
２セグメントリング体
３リング間継手
４一方のセグメント
５他方のセグメント
６雄継手
７雌継手
１０ベース板
１１袋ナット
１２袋ナット
１３ボルト（一方のボルト）
１３ａ軸部（棒体）
１３ｂヘッド（係止部）
１４ボルト（他方のボルト）
１４ａ軸部（棒体）
１４ｂヘッド（係止部）
１５当接板
１５ａ挿通孔
１５ｂ挿通孔
１６スペーサ
１７スペーサ
１８鋼製バネ（弾性体）
１９鋼製バネ（弾性体）
２５係止板
２５ａ先端（一端）
２５ｂ後端（他端）
Ａセグメントの継手構造（ピース間継手）
Ｍセグメントの幅
Ｏ１セグメントの軸
Ｏ２トンネルの軸線
Ｓスライド方向
Ｔトンネル DESCRIPTION OF SYMBOLS 1 Segment 1b Joining end surface 1c Joining end surface 1d of one segment Joining end surface 2 of the other segment Segment ring body 3 Inter-ring joint 4 One segment 5 Other segment 6 Male joint 7 Female joint 10 Base plate 11 Cap nut 12 Cap nut 13 bolts (one bolt)
13a Shaft (rod)
13b Head (locking part)
14 bolts (the other bolt)
14a Shaft (rod)
14b Head (locking part)
15 Contact plate 15a Insertion hole 15b Insertion hole 16 Spacer 17 Spacer 18 Steel spring (elastic body)
19 Steel spring (elastic body)
25 Locking plate 25a Tip (one end)
25b Rear end (other end)
A segment joint structure (joint between pieces)
M Segment width O1 Segment axis O2 Tunnel axis S Sliding direction T Tunnel

Claims

The joint structure of the segment that joins the pair of segments by sliding the joint end faces of the pair of segments facing each other,
It consists of a male joint provided in one segment and a female joint provided in the other segment,
The male joint protrudes outward from the joint end surface of the one segment, and is formed with a plurality of rod bodies arranged in parallel in a direction in which the joint end surfaces are slid, and a larger diameter than the rod body, A locking portion provided at each distal end of the rod body, and a contact plate that is continuous with the plurality of rod bodies by inserting the plurality of rod bodies through the insertion holes,
The female joint includes a locking plate that extends from one end to the other end side, and has a notch formed so that the plurality of rods can be fitted from the side,
The joint end surfaces are slid together, the locking plate is in contact with the contact plate, and a portion located between the joint end surface of the one segment of the plurality of rods and the contact plate is fitted into the notch portion. The joint structure of the segment characterized by being comprised.

In the joint structure of the segment according to claim 1,
The contact plate is formed such that a width of a front end on the rod side first fitted in the cutout portion by sliding the joining end faces is smaller than a width on a rear end side. Joint structure.

In the joint structure of the segment according to claim 1 or 2,
The male joint has a segment joint structure comprising an elastic body interposed between the locking portion and the contact plate.