JP4140037B2

JP4140037B2 - Shield tunnel segment and shield tunnel lining using the segment

Info

Publication number: JP4140037B2
Application number: JP11314699A
Authority: JP
Inventors: 昌弘倉持
Original assignee: 興建産業株式会社
Priority date: 1999-04-21
Filing date: 1999-04-21
Publication date: 2008-08-27
Anticipated expiration: 2019-04-21
Also published as: JP2000303792A

Description

【０００１】
【発明の属する技術分野】
本発明は、シールドトンネル用セグメント及び該セグメントを使用したシールドトンネル覆工に関する。
【０００２】
【従来の技術】
一般にシールドトンネルは、シールド掘削機の後端部側で、円形断面の覆工形状を複数に分割した円弧状セグメントを組み立て、円形リング状の覆工を順次延長して形成し、これに反力をとってシールド掘削機を推進させるようにしている。
【０００３】
この種のシールドトンネルに使用されている従来のセグメントは、円弧状をなし、覆工の周方向の接合、即ちピース間接合及び一屈進工程毎に延長される覆工リングのトンネル軸方向側の接合、即ちリング間接合を、何れもボルトとナットを使用した剛接合によっている。
【０００４】
【発明が解決しようとする課題】
このような従来のシールドトンネル用のセグメントは、リング間及びピース間の接合がボルトとナットによる連結であるため、そのための金具を多く要し、組み立て時の手作業が多く自動組み立てが困難であり、しかもアンカーナットやボルト挿入孔形成用のパイプ等を高精度にインサート成形する必要からもコスト高となるという問題点があった。
【０００５】
本発明の目的は、金具を用いないで接合を行えるシールドトンネル用セグメント及び該セグメントを使用したシールドトンネル覆工を得ることにある。
【０００６】
【課題を解決するための手段】
上述の如き従来の問題点を解決し、所期の目的を達成するための本発明に係るシールドトンネル用セグメントの特徴は、セグメント本体の覆工周方向の一方のピース間接合面にセグメント幅方向に向けた溝状の凹嵌合部が形成され、他方のピース間接合面に前記凹嵌合部に嵌り合う形状の凸嵌合部を一体に備え、前記凹嵌合部の一部に合成樹脂製の凹形接合具を埋設するとともに、前記凸嵌合部の一部に前記凹形接合具に嵌り合う形状の凸形接合具を埋設してなるシールドトンネル用セグメントにおいて、
【０００７】
前記凹形接合具は、接合面が断面半円形状をした溝状の凹面となっている雌形基体部と、該雌形基体部の背面の長手方向の両端にそれぞれ一体に形成されている断面形状が筒状で端部にロック部が外開きに突設されているアンカー部とで構成され、前記アンカー部が一方の前記ピース間接合端面に前記雌形基体部の先端を開口させて埋設され、
凸形接合具は、先端部に前記雌形基体部の凹面に嵌め合わされる円形曲面を備えている雄形基体部と、該雄形基体部の背面の長手方向の両端にそれぞれ一体に形成されている断面形状が筒状で端部にロック部が外開きに突設されているアンカー部とで構成され、前記雄形基体部を他方の前記ピース間接合端面から突出させて埋設されていることにある。
【０００８】
このようにセグメント本体の覆工周方向の両端のピース間接合端面に樹脂製の凹形接合具と樹脂製の凸形接合具とを設けると、凹凸の嵌め合わせで接合することができて、自動組み立てが可能になる。また、凹形接合具と凸形接合具とが共に樹脂製であると、腐食せず、軽量であり、且つコストの低減を図ることができる。さらに、各アンカー部の断面形状が筒状で端部にロック部が外開きに突設されていると、筒状のアンカー部の外開きのロック部の存在により、アンカー作用を確実に行わせることができる。
【０００９】
たま、このようにアンカー部を各基体部の背面における長手方向の両側にそれぞれ突設すると、各接合具のセグメント本体に対する埋設強度を一層向上させることができる。
【００１０】
また、本発明に係るシールドトンネル覆工の特徴は、セグメント本体の覆工周方向の一方のピース間接合面にセグメント幅方向に向けた溝状の凹嵌合部が形成され、他方のピース間接合面に前記凹嵌合部に嵌り合う形状の凸嵌合部を一体に備えてなるセグメントを前記凹嵌合部と凸嵌合部とを互いに嵌め合せたヒンジ結合により、リング状に組み立てられ、前記凹嵌合部の一部に合成樹脂製の凹形接合具を埋設するとともに、前記凸嵌合部の一部に前記凹形接合具に嵌り合う形状の凸形接合具を埋設したシールドトンネル覆工において、
【００１１】
前記凹形接合具は、接合面が断面半円形状をした溝状の凹面となっている雌形基体部と、該雌形基体部の背面の長手方向の両端にそれぞれ一体に形成されている断面形状が筒状で端部にロック部が外開きに突設されているアンカー部とで構成され、前記アンカー部が一方の前記ピース間接合端面に前記雌形基体部の先端を開口させて埋設され、
【００１２】
凸形接合具は、先端部に前記雌形基体部の凹面に嵌め合わされる円形曲面を備えている雄形基体部と、該雄形基体部の背面の長手方向の両端にそれぞれ一体に形成されている断面形状が筒状で端部にロック部が外開きに突設されているアンカー部とで構成され、前記雄形基体部を他方の前記ピース間接合端面から突出させて埋設され、
セグメント本体のトンネル軸方向側の各リング接合面間において前記凹形接合具の前記雌形基体部に前記凸形接合具の雄形基体部が相互に嵌め合わされて連結されていることにある。
【００１３】
このようにセグメント本体の覆工周方向の両端のピース間接合端面に樹脂製の凹形接合具と樹脂製の凸形接合具とを設けると、凹凸の嵌め合わせで接合することができて、シールドトンネル覆工の自動組み立てが可能になる。また、さらに、凹形接合具と凸形接合具とが樹脂製であると、腐食せず、軽量であり、且つコストの低減を図ることができる。さらに、各アンカー部の断面形状が筒状で端部にロック部が外開きに突設されていると、筒状のアンカー部の外開きのロック部の存在により、アンカー作用を確実に行わせることができる。
【００１４】
【発明の実施の形態】
図１〜図１１は、本発明に係るシールドトンネル用セグメント及び該セグメントを使用したシールドトンネル覆工における実施の形態の一例を示したものである。本例は、多角形のシールドトンネル覆工に本発明を適用した例について示している。
【００１５】
本例のシールドトンネル覆工１は、図１及び図２に示すように、外形状が正十角形に形成され、四種類の角型セグメント、即ち、３個の普通セグメント２、２個の最終連結凹部用セグメント３ａ，３ｂ及び１個の最終挿入セグメント４をそれぞれヒンジ接合させることによって、各１リング１ａ，１ａ……がそれぞれ組み立てられている。
【００１６】
普通セグメント２は、図３及び図４に示すように、覆工１の外周面の互いに隣り合う２平面１０ａ，１０ｂを外面側に有する平面状部１１ａ，１１ｂを一体に有する山形に形成されており、両平面１０ａ，１０ｂの長さがそれぞれ覆工１の外面の多角形の一辺の全長を構成する長さとなっている。
【００１７】
最終連結凹部用セグメント３ａは、図５及び図６に示すように、前述の普通セグメント２と同様に、覆工１の外周面の互いに隣り合う２平面１０ａ，１０ｂを外面側に有する平面状部１１ａ，１１ｂを一体に有する山形に形成されているものであるが、一方の平面状部１１ｂの長さが覆工１の外面の多角形の一辺の全長を構成する長さとなっているのに対し、他方の平面状部１１ａの長さが前記一辺の略半分の長さとなっており、且つ該平面状部１１ａは坑口側が切羽側に比べて長くなっている。
【００１８】
また、他方の最終連結凹部用セグメント３ｂは、図１及び図２に示すように、前述した最終連結凹部用セグメント３ａと対象な形状に成形され、両セグメント３ａ，３ｂの間に形成される最終連結セグメント挿入空間ａは、切羽側が広くなるようになっている。
【００１９】
最終挿入セグメント４は、前述した空間ａ内に挿入されて覆工リング１ａが完成されるようになっているものであり、図７及び図８に示すように、覆工１の外周面の互いに隣り合う２平面１０ａ，１０ｂを外面側に有する平面状部１１ａ，１１ｂを一体に有する山形に形成されているものであるが、両平面状部１１ａ，１１ｂの長さがそれぞれ覆工１の外面の一辺の長さの略半分の長さとなっており、各平面状部１１ａ，１１ｂは切羽側が広く成形されている。
【００２０】
各セグメント２，３ａ，３ｂ，４は、それぞれ山形の稜線部２１の内面側は平面状のＲ部２２が形成されている。両端のピース間接合面２３ａ，２３ｂは、それぞれ覆工１の半径方向と同じ角度に成形され、一方のピース間接合面２３ａには、セグメント幅方向に向けた溝状の凹嵌合部２４が形成され、他方のピース間接合面２３ｂには、前記凹嵌合部２４に嵌まり合う形状の凸嵌合部２５が一体に突設されている。
【００２１】
また、ピース間接合面２３ａ，２３ｂの中央側には、それぞれ１対の樹脂製の凹形接合具２６と樹脂製の凸形接合具２７とが埋設されている。
【００２２】
凹形接合具２６は、図９〜図１４に示すように、接合面２８ａが断面半円形状をした溝状の凹面となっている雌形基体部２８と、該雌形基体部２８の背面の長手方向の両端に一体に形成されている断面形状が角筒状で端部にロック部２９が外開きに突設されているアンカー部３０とで構成されている。雌形基体部２８の背面には、所定間隔で補強リブ３１が突設されている。各アンカー部３０の先端部は、開口されている。
【００２３】
接合面２８ａの凹面は、各セグメントの凹嵌合部２４の凹面と同じ断面形状となっており、雌型基体部２８が凹嵌合部２４の一部を構成するように、各セグメントに埋設されている。
【００２４】
凸形接合具２７は、図１５〜図２０に示すように、雌形基体部２８に嵌め合わされるように接合面３２ａが凸面となっている雄形基体部３２と、該雄形基体部３２の背面の長手方向の両端に一体に形成されている断面形状が角筒状で端部にロック部３３が外開きに突設されているアンカー部３４とで構成されている。各アンカー部３４の先端部は、開口されている。前記接合面３２ａにはその先端部に前記雌形基体部の凹面に嵌め合わされる円形曲面を備えている
【００２５】
接合面３２ａは、セグメントの凸嵌合部２５の凸面と同じ断面形状となっており、雄形基体部３２が他方のピース間接合端面２３ｂから突出した凸嵌合部２５の一部を構成するような各セグメントに埋設されている。
【００２６】
各セグメント２，３ａ，３ｂ，４の一方のリング間接合面３５ａには連結用突起３６，３６…が、また他方のリング間接合面３５ｂには対応する連結用突起３６が嵌まり合う突起嵌合孔３７が設けられている。
【００２７】
さらに、各セグメント２，３ａ，３ｂ，４の各接合面２３ａ，２３ｂ，３５ａ，３５ｂには、互いに連続する配置にシール材嵌め込み用の溝部３８が形成されている。
【００２８】
これらセグメント２，３ａ，３ｂ，４を使用した覆工１の組み立ては、従来と同様の組み立て装置を使用し、図１，図２に示すように、各セグメントのピース間接合面２３ａ，２３ｂで凹部嵌合部２４と凸部嵌合部２５とを嵌め合わせることによって、図２１に示すように凹形接合具２６の凹面の一部となっている接合面２８ａに凸形接合具２７の雄形基体部３２の先端部を嵌めることによりヒンジ接合による連結がなされる。両最終連結凹部用セグメント３ａ，３ｂを組み立てた後、最終挿入セグメント４を、覆工外面高さ位置から覆工軸方向に移動させて最終連結凹部用セグメント３ａ，３ｂ間の最終連結セグメント挿入空間ａに挿入することにより１リングの組み立てを完了する。
【００２９】
なお、リング１ａ，１ａ間においては、先に組み立てたリングのピース間接合部に、後に組み立てるリングのセグメントの稜線部が位置するように、覆工外周の多角形の１辺ずつ位置をずらせ、両リング１ａ，１ａ間において連結用突起３６を対応する突起嵌合孔３７に嵌めることにより連結する。
【００３０】
なお、本発明において各セグメントは必ずしもその内面側のＲ部２２は必要ではない。
【００３１】
【発明の効果】
請求項１に記載のシールドトンネル用セグメントにおいては、セグメント本体の覆工周方向の両端のピース間接合端面に樹脂製の凹形接合具と樹脂製の凸形接合具とを設けているので、凹凸の嵌め合わせで接合することができて、自動組み立てが可能になる。また、凹形接合具と凸形接合具とが共に樹脂製であるので、腐食せず、軽量であり、且つコストの低減を図ることができる。さらに、各アンカー部の断面形状が筒状で端部にロック部が外開きに突設されているので、筒状のアンカー部の外開きのロック部の存在により、アンカー作用を確実に行わせることができる。
【００３２】
請求項２に記載のシールドトンネル用セグメントにおいては、アンカー部を各基体部の背面における長手方向の両側にそれぞれ突設しているので、各接合具のセグメント本体に対する埋設強度を一層向上させることができる。
【００３３】
請求項３に記載のシールドトンネル覆工では、セグメント本体の覆工周方向の両端のピース間接合端面に樹脂製の凹形接合具と樹脂製の凸形接合具とを設けているので、凹凸の嵌め合わせで接合することができて、シールドトンネル覆工の自動組み立てが可能になる。また、さらに、凹形接合具と凸形接合具とが樹脂製であるので、腐食せず、軽量であり、且つコストの低減を図ることができる。さらに、各アンカー部の断面形状が筒状で端部にロック部が外開きに突設されているので、筒状のアンカー部の外開きのロック部の存在により、アンカー作用を確実に行わせることができる。
【図面の簡単な説明】
【図１】本発明に係るシールドトンネル覆工の一例を示す正面図である。
【図２】図１の部分展開平面図である。
【図３】本発明に係る角形セグメントの一例の側面図である。
【図４】図３に示す角形セグメントの底面図である。
【図５】本発明に係る角形セグメントの他の例の側面図である。
【図６】図５に示す角形セグメントの底面図である。
【図７】本発明に係る角形セグメントの更に他の例の側面図である。
【図８】図７に示す角形セグメントの底面図である。
【図９】本発明で用いている凹形接合具の一例を示す平面図である。
【図１０】同上の正面図である。
【図１１】同上の底面図である。
【図１２】同上の側面図である。
【図１３】図１０中のＡ−Ａ線断面図である。
【図１４】図１０中のＢ−Ｂ線断面図である。
【図１５】本発明で用いている凸形接合具の一例を示す平面図である。
【図１６】同上の左半分を縦断して示す平面図である。
【図１７】同上の底面図である。
【図１８】同上の側面図である。
【図１９】図１５中のＣ−Ｃ線断面図である。
【図２０】図１５中のＤ−Ｄ線断面図である。
【図２１】凹形接合具と凸形接合具の嵌合状態での側面図である。
【符号の説明】
１シールドトンネル覆工
１ａ１リング
２普通セグメント
３ａ，３ｂ最終連結凹部用セグメント
４最終挿入セグメント
１０ａ，１０ｂ平面
１１ａ，１１ｂ平面状部
２１稜線部
２２Ｒ部
２３ａ，２３ｂピース間接合面
２４凹嵌合部
２５凸嵌合部
２６凹形接合具
２７凸形接合具
２８雌形基体部
２９ロック部
３０アンカー部
３１補強リブ
３２雄形基体部
３３ロック部
３４アンカー部
３５ａ，３５ｂリング間接合面
３６連結用突起
３７突起嵌合孔
３８溝部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield tunnel segment and a shield tunnel lining using the segment.
[0002]
[Prior art]
Generally, a shield tunnel is formed by assembling an arc segment that divides a circular cross-section lining shape into multiple pieces on the rear end side of a shield excavator, and then forming a circular ring-shaped lining in order and reacting to it. The shield excavator is propelled.
[0003]
The conventional segment used in this type of shield tunnel has an arc shape and is the circumferential joint of the lining, that is, the tunnel axial side of the lining ring that is extended every piece joining and bending process. The joints between the rings, that is, the joints between the rings, are both rigid joints using bolts and nuts.
[0004]
[Problems to be solved by the invention]
In such a conventional shield tunnel segment, the rings and pieces are joined by bolts and nuts, so many metal fittings are required, and many manual operations are required during assembly, making automatic assembly difficult. In addition, there is a problem in that the cost is increased because it is necessary to insert-mold an anchor nut, a pipe for forming a bolt insertion hole, or the like with high accuracy.
[0005]
An object of the present invention is to obtain a shield tunnel segment that can be joined without using a metal fitting and a shield tunnel lining using the segment.
[0006]
[Means for Solving the Problems]
The features of the shield tunnel segment according to the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows. A groove-shaped concave fitting portion is formed, and a convex fitting portion having a shape that fits into the concave fitting portion is integrally formed on the joint surface between the other pieces , and is synthesized with a part of the concave fitting portion. In the shield tunnel segment formed by embedding a concave joint made of resin and embedding a convex joint having a shape that fits into the concave joint in a part of the convex fitting portion ,
[0007]
The concave connector is integrally formed with a female base portion having a groove-like concave surface with a semicircular cross section of the joint surface, and both longitudinal ends of the back surface of the female base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion is provided at the end with a locking portion projecting outwardly, and the anchor portion opens the tip of the female base portion at one of the end faces between the pieces. Buried,
The convex connector is integrally formed at both ends in the longitudinal direction of the male base portion having a circular curved surface fitted to the concave surface of the female base portion at the tip and the back surface of the male base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion with a locking portion protruding outward is provided at the end portion, and the male base portion is embedded so as to protrude from the other inter-piece joining end surface. There is.
[0008]
In this way, when a resin concave joint and a resin convex joint are provided on the joint end faces between the pieces at both ends in the wrapping circumferential direction of the segment body, it can be joined by fitting the concave and convex, Automatic assembly becomes possible. Moreover, when both the concave connector and the convex connector are made of resin, they do not corrode, are lightweight, and can reduce costs. Furthermore, when the cross-sectional shape of each anchor part is cylindrical and the lock part protrudes outward at the end part, the anchor action is reliably performed by the presence of the outwardly open lock part of the cylindrical anchor part. be able to.
[0009]
As described above, when the anchor portions are provided so as to protrude on both sides in the longitudinal direction on the back surface of each base portion, the embedding strength of each connector in the segment main body can be further improved.
[0010]
The feature of the shield tunnel lining according to the present invention, 凹嵌engaging portion grooved toward the segment width direction is formed on one piece between joint surfaces of the lining circumferential direction of the segment body, the other piece indirect A segment that is integrally provided with a convex fitting portion shaped to fit into the concave fitting portion on the mating surface is assembled into a ring shape by hinge coupling in which the concave fitting portion and the convex fitting portion are fitted together. A shield in which a concave connector made of synthetic resin is embedded in a part of the concave fitting portion and a convex connector having a shape that fits in the concave connector is embedded in a part of the convex fitting portion. In tunnel lining,
[0011]
The concave connector is integrally formed with a female base portion having a groove-like concave surface with a semicircular cross section of the joint surface, and both longitudinal ends of the back surface of the female base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion is provided at the end with a locking portion projecting outwardly, and the anchor portion opens the tip of the female base portion at one of the end faces between the pieces. Buried,
[0012]
The convex connector is integrally formed at both ends in the longitudinal direction of the male base portion having a circular curved surface fitted to the concave surface of the female base portion at the tip and the back surface of the male base portion. The cross-sectional shape is cylindrical and is configured with an anchor portion with a lock portion projecting outwardly at the end portion, and the male base portion is embedded to protrude from the other piece joining end surface,
The male base portion of the convex joint is fitted and connected to the female base portion of the concave joint between the ring joint surfaces on the tunnel axis direction side of the segment body .
[0013]
In this way, when a resin concave joint and a resin convex joint are provided on the joint end faces between the pieces at both ends in the wrapping circumferential direction of the segment body, it can be joined by fitting the concave and convex, Automatic assembly of shield tunnel lining becomes possible. Furthermore, if the concave connector and the convex connector are made of resin, they do not corrode, are lightweight, and can reduce costs. Furthermore, when the cross-sectional shape of each anchor part is cylindrical and the lock part protrudes outward at the end part, the anchor action is reliably performed by the presence of the outwardly open lock part of the cylindrical anchor part. be able to.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 to 11 show an example of an embodiment of a shield tunnel segment according to the present invention and a shield tunnel lining using the segment. This example shows an example in which the present invention is applied to a polygonal shield tunnel lining.
[0015]
As shown in FIGS. 1 and 2, the shield tunnel lining 1 of this example has an outer shape formed in a regular decagon and has four types of square segments, that is, three ordinary segments 2 and two final segments. Each of the rings 1a, 1a,... Is assembled by hinge-joining the connecting recess segments 3a, 3b and one final insertion segment 4, respectively.
[0016]
As shown in FIGS. 3 and 4, the ordinary segment 2 is formed in a mountain shape integrally including planar portions 11 a and 11 b having two adjacent planes 10 a and 10 b on the outer surface side of the outer peripheral surface of the lining 1. In addition, the lengths of both the flat surfaces 10a and 10b are the lengths constituting the entire length of one side of the polygon of the outer surface of the lining 1.
[0017]
As shown in FIGS. 5 and 6, the final connecting recess segment 3 a is a planar portion having two adjacent flat surfaces 10 a and 10 b on the outer surface side of the outer peripheral surface of the lining 1, as in the case of the ordinary segment 2 described above. 11a and 11b are integrally formed, but the length of one planar portion 11b is the length constituting the entire length of one side of the polygon of the outer surface of the lining 1 On the other hand, the length of the other planar portion 11a is approximately half the length of the one side, and the planar portion 11a is longer on the wellhead side than on the face side.
[0018]
Further, as shown in FIGS. 1 and 2, the other final connecting recess segment 3b is formed into a target shape with the above-described final connecting recess segment 3a, and is finally formed between the segments 3a and 3b. The connecting segment insertion space a is configured such that the face side becomes wider.
[0019]
The final insertion segment 4 is inserted into the space a described above to complete the lining ring 1a. As shown in FIGS. 7 and 8, the outer peripheral surfaces of the lining 1 are mutually connected. The two flat surfaces 10a and 10b are formed in a mountain shape integrally having the planar portions 11a and 11b having the two outer surfaces 10a and 10b on the outer surface side, but the lengths of both the planar portions 11a and 11b are the outer surfaces of the lining 1 respectively. The length of each side is approximately half of the length of each side, and each of the planar portions 11a and 11b is widely formed on the face side.
[0020]
Each of the segments 2, 3 a, 3 b, 4 is formed with a planar R portion 22 on the inner surface side of the mountain-shaped ridge line portion 21. The piece-to-piece joint surfaces 23a and 23b at both ends are respectively formed at the same angle as the radial direction of the lining 1, and the groove-shaped concave fitting portion 24 directed in the segment width direction is formed on one piece-piece joint surface 23a. A convex fitting portion 25 having a shape that fits into the concave fitting portion 24 is integrally formed on the other piece-joining surface 23b.
[0021]
In addition, a pair of resin-made concave joints 26 and resin-made convex joints 27 are embedded in the center sides of the inter-piece joint surfaces 23a, 23b.
[0022]
As shown in FIGS. 9 to 14, the concave connector 26 includes a female base portion 28 having a groove-like concave surface with a semicircular cross section of the joint surface 28 a, and a back surface of the female base portion 28. The cross-sectional shape integrally formed at both ends in the longitudinal direction is a rectangular tube shape, and an anchor portion 30 is provided with a lock portion 29 projecting outwardly at the end portion. Reinforcing ribs 31 project from the back surface of the female base portion 28 at predetermined intervals. The distal end portion of each anchor portion 30 is opened.
[0023]
The concave surface of the joint surface 28 a has the same cross-sectional shape as the concave surface of the concave fitting portion 24 of each segment, and is embedded in each segment so that the female base portion 28 constitutes a part of the concave fitting portion 24. Has been.
[0024]
As shown in FIGS. 15 to 20, the convex connector 27 includes a male base portion 32 having a convex joint surface 32 a so as to be fitted to the female base portion 28, and the male base portion 32. The cross-sectional shape formed integrally at both ends in the longitudinal direction of the back surface of the back plate is a rectangular tube shape, and an anchor portion 34 is provided with a lock portion 33 projecting outwardly at the end portion. The tip of each anchor portion 34 is opened. The joint surface 32a is provided with a circular curved surface fitted to the concave surface of the female base portion at the tip thereof.
The joint surface 32a has the same cross-sectional shape as the convex surface of the convex fitting portion 25 of the segment, and the male base portion 32 constitutes a part of the convex fitting portion 25 protruding from the other inter-piece joining end surface 23b. Embedded in each segment.
[0026]
The projections 36, 36... Are fitted on one of the inter-ring joint surfaces 35 a of the segments 2, 3 a, 3 b, 4, and the corresponding joint projection 36 is fitted on the other inter-ring joint surface 35 b. A joint hole 37 is provided.
[0027]
Furthermore, a groove 38 for fitting a sealing material is formed on each joint surface 23a, 23b, 35a, 35b of each segment 2, 3a, 3b, 4 in a continuous arrangement.
[0028]
Assembling of the lining 1 using these segments 2, 3a, 3b, 4 uses an assembly device similar to the conventional one, and as shown in FIGS. 1 and 2, at the inter-piece joint surfaces 23a, 23b of each segment. By fitting the recessed portion fitting portion 24 and the protruding portion fitting portion 25 together, as shown in FIG. 21, the male surface of the convex connector 27 is joined to the joint surface 28a which is a part of the concave surface of the concave connector 26. By connecting the tip of the shaped base portion 32, the connection by hinge joining is made. After assembling both the final connection recess segments 3a and 3b, the final insertion segment 4 is moved in the direction of the lining axis from the lining outer surface height position, and the final connection segment insertion space between the final connection recess segments 3a and 3b. The assembly of one ring is completed by inserting it into a.
[0029]
In addition, between the rings 1a, 1a, the position of the polygon of the outer periphery of the lining is shifted one by one so that the ridge line portion of the segment of the ring to be assembled later is located at the joint portion between the pieces of the ring assembled earlier, The two rings 1a and 1a are connected by fitting the connecting protrusions 36 into the corresponding protrusion fitting holes 37.
[0030]
In the present invention, each segment does not necessarily require the R portion 22 on the inner surface side.
[0031]
【The invention's effect】
In the shield tunnel segment according to claim 1, since the resin-made concave joint and the resin convex joint are provided on the piece-to-piece joint end faces at both ends in the wrapping circumferential direction of the segment body, It is possible to join by uneven fitting, and automatic assembly becomes possible. Moreover, since both the concave connector and the convex connector are made of resin, they do not corrode, are lightweight, and cost can be reduced. Furthermore, since the cross-sectional shape of each anchor part is cylindrical and the lock part protrudes outward at the end part, the anchor action is surely performed by the presence of the outwardly open lock part of the cylindrical anchor part. be able to.
[0032]
In the shield tunnel segment according to claim 2, since the anchor portions protrude from both sides in the longitudinal direction on the back surface of each base body portion, the embedding strength of each joint to the segment body can be further improved. it can.
[0033]
In the shield tunnel lining according to claim 3, since the concave joint made of resin and the convex joint made of resin are provided on the joint surface between the pieces at both ends in the circumferential direction of the segment body, Can be joined by fitting, and automatic assembly of shield tunnel lining becomes possible. Furthermore, since the concave connector and the convex connector are made of resin, they do not corrode, are lightweight, and can reduce costs. Furthermore, since the cross-sectional shape of each anchor part is cylindrical and the lock part protrudes outward at the end part, the anchor action is surely performed by the presence of the outwardly open lock part of the cylindrical anchor part. be able to.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a shield tunnel lining according to the present invention.
2 is a partially developed plan view of FIG. 1. FIG.
FIG. 3 is a side view of an example of a square segment according to the present invention.
4 is a bottom view of the square segment shown in FIG. 3. FIG.
FIG. 5 is a side view of another example of a square segment according to the present invention.
6 is a bottom view of the square segment shown in FIG. 5. FIG.
FIG. 7 is a side view of still another example of the square segment according to the present invention.
FIG. 8 is a bottom view of the square segment shown in FIG. 7;
FIG. 9 is a plan view showing an example of a concave connector used in the present invention.
FIG. 10 is a front view of the above.
FIG. 11 is a bottom view of the above.
FIG. 12 is a side view of the above.
13 is a cross-sectional view taken along line AA in FIG.
14 is a cross-sectional view taken along the line BB in FIG.
FIG. 15 is a plan view showing an example of a convex connector used in the present invention.
FIG. 16 is a plan view showing the left half of the above in a longitudinal section.
FIG. 17 is a bottom view of the above.
FIG. 18 is a side view of the above.
19 is a cross-sectional view taken along the line CC in FIG.
20 is a cross-sectional view taken along the line DD in FIG.
FIG. 21 is a side view of the concave connector and the convex connector in the fitted state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shield tunnel lining 1a 1 ring 2 Normal segment 3a, 3b Segment for final connection recessed part 4 Final insertion segment 10a, 10b Plane part 11a, 11b Planar part 21 Ridge part 22 R part 23a, 23b Interpiece joint surface 24 Concave fitting Part 25 Convex fitting part 26 Concave joint 27 Convex joint 28 Female base part 29 Lock part 30 Anchor part 31 Reinforcement rib 32 Male base part 33 Lock part 34 Anchor part 35a, 35b Inter-ring joint surface 36 Connection Projection 37 projection fitting hole 38 groove

Claims

A groove-shaped concave fitting part facing in the segment width direction is formed on one joint surface between the pieces in the wrapping circumferential direction of the segment main body, and a convex shape that fits the concave fitting part on the other joint surface between pieces. includes a fitting portion integrally, the凹嵌with embedded part made of a synthetic resin concave connectors merging portion, a convex shape that fits into the concave connectors on a part of the convex fitting portion In shield tunnel segments with embedded joints ,
The concave connector is integrally formed with a female base portion having a groove-like concave surface with a semicircular cross section of the joint surface, and both longitudinal ends of the back surface of the female base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion is provided at the end with a locking portion projecting outwardly, and the anchor portion opens the tip of the female base portion at one of the end faces between the pieces. Buried,
The convex connector is integrally formed at both ends in the longitudinal direction of the male base portion having a circular curved surface fitted to the concave surface of the female base portion at the tip and the back surface of the male base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion with a locking portion protruding outward is provided at the end portion, and the male base portion is embedded so as to protrude from the other inter-piece joining end surface. This is a shield tunnel segment.

A groove-shaped concave fitting part facing in the segment width direction is formed on one joint surface between the pieces in the wrapping circumferential direction of the segment main body, and a convex shape that fits the concave fitting part on the other joint surface between pieces. A segment formed integrally with a fitting portion is assembled in a ring shape by hinge coupling in which the concave fitting portion and the convex fitting portion are fitted together, and a part of the concave fitting portion is made of a synthetic resin. In the shield tunnel lining in which a concave connector is embedded and a convex connector having a shape that fits into the concave connector is embedded in a part of the convex fitting portion,
The concave connector is integrally formed with a female base portion having a groove-like concave surface with a semicircular cross section of the joint surface, and both longitudinal ends of the back surface of the female base portion. The cross-sectional shape is a cylindrical shape, and an anchor portion is provided at the end with a locking portion projecting outwardly, and the anchor portion opens the tip of the female base portion at one of the end faces between the pieces. Buried,
The convex connector is integrally formed at both ends in the longitudinal direction of the male base portion having a circular curved surface fitted to the concave surface of the female base portion at the tip and the back surface of the male base portion. The cross-sectional shape is cylindrical and is configured with an anchor portion with a lock portion projecting outwardly at the end portion, and the male base portion is embedded to protrude from the other piece joining end surface,
The male base portion of the convex joint is fitted and connected to the female base portion of the concave joint between the ring joint surfaces on the tunnel axis direction side of the segment body. Become a shield tunnel lining.