JP5747522B2 - Segment consolidated structure - Google Patents
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- JP5747522B2 JP5747522B2 JP2011013115A JP2011013115A JP5747522B2 JP 5747522 B2 JP5747522 B2 JP 5747522B2 JP 2011013115 A JP2011013115 A JP 2011013115A JP 2011013115 A JP2011013115 A JP 2011013115A JP 5747522 B2 JP5747522 B2 JP 5747522B2
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Description
本発明は、セグメント連結構造およびセグメント連結方法に関するものであり、具体的には、セグメントにおける特段の補強を必要とせずに、セグメント間の効率的かつ確実な連結を可能とする技術に関する。 The present invention relates to a segment connection structure and a segment connection method, and specifically to a technique that enables efficient and reliable connection between segments without requiring special reinforcement in the segments.
シールド工法を採用してトンネルを構築する場合には、切羽の掘進に応じて後方でセグメントを連結し、筒状の覆工体を形成していくことが一般的である。こうしたセグメント同士の連結作業を単純化し、作業の効率化を図るための種々の連結構造が提案されている。 When a tunnel is constructed by adopting the shield method, it is common to connect segments at the rear to form a cylindrical lining body according to the excavation of the face. Various connection structures have been proposed for simplifying the connection work between the segments and improving the work efficiency.
こうした技術の例としては、例えば、更なる施工の高速化、省力化を図ることができるセグメント及びそのセグメントを用いた覆工方法を提供するとの課題の下、掘削穴の軸線周りに周設されると共にその軸線方向に連設されて筒状壁体を形成するセグメントであって、前記セグメントの前記軸線方向の両端面には、凸部が設けられ、該セグメントの前記軸線方向の両端面において該軸線方向に隣接するセグメントの前記凸部に対応する位置には、該凸部が嵌合する凹部が形成されていることを特徴とするセグメント（特許文献１）などが提案されている。 As an example of such technology, for example, under the problem of providing a segment capable of further speeding up construction and saving labor and a lining method using the segment, it is provided around the axis of the drilling hole. And a segment that is connected in the axial direction to form a cylindrical wall body, wherein both end surfaces of the segment in the axial direction are provided with protrusions, and both end surfaces of the segment in the axial direction are provided. A segment (Patent Document 1) or the like has been proposed in which a concave portion into which the convex portion is fitted is formed at a position corresponding to the convex portion of the segment adjacent in the axial direction.
従来の連結構造においては、セグメントの主桁に凹部を設けることになるため、そのままでは主桁の強度は低下する。一方で、この凹部には、これに嵌合する凸部がトンネル周方向に互いに離れようとする力が直接働く。この力に対抗する為には、凹部が形成されている主桁自体の強度を大きなものとする必要がある。そのため従来の連結構造に採用される主桁は、肉厚で桁高も大きなものが必要であった。また、こうした強度面での懸念に対応するために、凹部周りの主桁に補強材を設置することとすれば、作業コストや部材コストもかさみ、連結構造の導入コスト増大を招く恐れもある。 In the conventional connection structure, since the concave portion is provided in the main girder of the segment, the strength of the main girder is lowered as it is. On the other hand, the force which the convex part fitted to this tries to leave | separate mutually in a tunnel circumferential direction acts on this recessed part directly. In order to counter this force, it is necessary to increase the strength of the main girder in which the recess is formed. Therefore, the main girder used in the conventional connecting structure needs to be thick and have a large girder height. Further, if a reinforcing material is installed on the main girder around the concave portion in order to cope with such a concern in terms of strength, the work cost and the member cost are increased, and the introduction cost of the connection structure may be increased.
そこで本発明では、セグメントにおける特段の補強を必要とせずに、セグメント間の効率的かつ確実な連結を可能とする技術の提供を目的とする。 Accordingly, an object of the present invention is to provide a technique that enables efficient and reliable connection between segments without requiring special reinforcement in the segments.
上記課題を解決する本発明のセグメント連結構造は、所定セグメントを、当該所定セグメントとトンネル軸方向に隣接する２つのセグメントに跨って主桁同士で当接させることで、前記２つのセグメントの各主桁端部に備わる凸部対を、前記所定セグメントの主桁に備わる挿通孔に挿入し、前記挿通孔を介し前記所定セグメント内に突出した前記凸部対を拘束部材により拘束してなるセグメント連結構造において、前記拘束部材が、前記所定セグメントにおける前記挿通孔と連通する主桁裏側に配置され、前記挿通孔より小径かつ前記凸部対の挿入は許容するサイズ及び形状の開口と、前記凸部対の突出長のうち所定長分を収容する高さの内空とを備えるものであることを特徴とする。 In the segment connection structure of the present invention that solves the above-described problem, the main segments of the two segments are brought into contact with each other across the two segments adjacent to the predetermined segment in the tunnel axis direction. Segment connection formed by inserting a pair of convex portions provided at the end of a spar into an insertion hole provided in a main spar of the predetermined segment and constraining the convex portion pair protruding into the predetermined segment through the insertion hole by a restricting member In the structure, the constraining member is arranged on the back side of the main beam communicating with the insertion hole in the predetermined segment, and has an opening having a size and a shape smaller than the insertion hole and allowing the insertion of the convex portion pair, and the convex portion. It is characterized by comprising an inner space of a height that accommodates a predetermined length of the pair of protruding lengths .
なお、前記セグメント連結構造において、前記セグメントの主桁は、挿通孔に加えて、両端において凸部を備えるものであり、前記セグメントを、当該セグメントとトンネル軸方向に隣接する２つのセグメントに跨って主桁同士で当接させることで、前記２つのセグメントの各主桁端部に備わる凸部対を前記挿通孔に挿入して、前記挿通孔を介しセグメント内に突出した前記凸部対を前記拘束部材により拘束すると共に、前記セグメントの主桁両端に備わる各凸部を、前記２つのセグメントの各主桁に備わる挿通孔に挿入してなる、としてもよい。
これによれば、セグメントリングを構成する各セグメントの全ては、対向するセグメントリングにおけるセグメントとの間において上述の拘束部材による凸部対の拘束による連結構造を互いに構成することが可能となる。
In the segment connection structure, the main girder of the segment is provided with a convex portion at both ends in addition to the insertion hole, and the segment spans two segments adjacent to the segment in the tunnel axis direction. By bringing the main beams into contact with each other, the pair of protrusions provided at the end portions of the main beams of the two segments are inserted into the insertion holes, and the pair of protrusions protruding into the segment through the insertion holes are While restraining by a restraining member, each convex part provided in the both ends of the main girder of the segment may be inserted into the insertion hole provided in each main girder of the two segments.
According to this, all of the segments constituting the segment ring can mutually form a connection structure by restraining the convex portion pair by the restraining member between the segments in the opposing segment ring.
また、前記セグメント連結構造において、前記拘束部材は、前記所定セグメントの主桁裏側と点溶接または接着材で固定されているとしてもよい。In the segment connection structure, the restraining member may be fixed to the back side of the main beam of the predetermined segment by spot welding or an adhesive.
本発明によれば、セグメントにおける特段の補強を必要とせずに、セグメント間の効率的かつ確実な連結が可能となる。 According to the present invention, it is possible to efficiently and surely connect between segments without requiring special reinforcement in the segments.
以下に本発明の実施形態について図面を用いて詳細に説明する。図１は、本実施形態におけるセグメント連結構造１を示す図である。本実施形態におけるセグメント１０は、シールド工法におけるトンネルの覆工体として用いられる。シールド工法において、シールド掘進機内では、エレクタ等によりこのセグメント１０が逐次連結され、筒状の覆工体を形成するのが一般的である。そこで互いに連結されるセグメント１０の連結構造として、本実施形態のセグメント連結構造１を採用する。 Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a segment connection structure 1 in the present embodiment. The segment 10 in this embodiment is used as a tunnel lining body in the shield method. In the shield construction method, in the shield machine, it is general that the segments 10 are sequentially connected by an erector or the like to form a cylindrical covering body. Therefore, the segment connection structure 1 of the present embodiment is employed as the connection structure of the segments 10 that are connected to each other.
本実施形態のセグメント連結構造１を構成するセグメント１０は、図１に示すように、主桁１１の例えば、長手方向中央に設けられた挿通孔１２と、前記挿通孔１２に挿入された凸部対２２（詳細は後述）の離間を拘束する拘束部材１３とを備えている。本実施形態では、セグメント１０として、鋼殻４にコンクリート５を充填して一体化させた合成セグメントを例示している。但し、本発明の適用対象となるセグメントはこれに限定されず、例えば鋼製セグメントであってもよい。また、主桁１１における挿通孔１２の配置位置は、長手方向中央だけに限定されず、挿入される凸部対２２の位置等に応じて端部寄りであってもよい。 As shown in FIG. 1, the segment 10 constituting the segment connection structure 1 of the present embodiment includes an insertion hole 12 provided in the center of the main girder 11, for example, in the longitudinal direction, and a convex portion inserted into the insertion hole 12. And a restraining member 13 that restrains the separation of the pair 22 (details will be described later). In this embodiment, the synthetic segment which filled the steel shell 4 with the concrete 5 and integrated as the segment 10 is illustrated. However, the segment to which the present invention is applied is not limited to this, and may be a steel segment, for example. Moreover, the arrangement position of the insertion hole 12 in the main girder 11 is not limited to the center in the longitudinal direction, and may be closer to the end depending on the position of the convex pair 22 to be inserted.
前記セグメント１０の主桁１１の両端には凸部１４が備わっている。これは挿通孔１２に挿入される凸部対２２を構成するものとなる。従って、挿通孔１２に挿入される凸部対２２は、前記セグメント１０に対しトンネル軸方向に隣接する前記２つのセグメント（以後、セグメント対２１と称する）の各凸部１４からなる。セグメントリング２０をなす各セグメント３０は、例えば切羽側の主桁１１において、両端に凸部１４を突出させており、セグメント同士が連結する部位では、各セグメント端部の凸部１４が集まって対をなす構造となる。図１の例では、各セグメント３０の主桁１１の端部に２つの凸部１４が備わり、２セットの凸部対２２が形成されている。また、各セグメント１０は、当該セグメント１０とトンネル軸方向に隣接するセグメントリング２０における前記２つのセグメントを跨るよう、千鳥状に配置されることになる。 Convex portions 14 are provided at both ends of the main beam 11 of the segment 10. This constitutes the convex portion pair 22 inserted into the insertion hole 12. Therefore, the convex portion pair 22 inserted into the insertion hole 12 includes the convex portions 14 of the two segments (hereinafter referred to as segment pairs 21) adjacent to the segment 10 in the tunnel axis direction. Each segment 30 forming the segment ring 20 has, for example, a protruding portion 14 protruding from both ends of the main girder 11 on the face side, and the protruding portions 14 at the end portions of the segments are gathered at a portion where the segments are connected to each other. It becomes the structure which makes. In the example of FIG. 1, two convex portions 14 are provided at the end of the main beam 11 of each segment 30, and two sets of convex portion pairs 22 are formed. Each segment 10 is arranged in a staggered manner so as to straddle the two segments in the segment ring 20 adjacent to the segment 10 in the tunnel axis direction.
なお図１の例では、前記主桁１１においていわゆるリング間継手４０も設けている。リング間継手４０としては、施工が容易なピン挿入式継手、例えばプッシュグリップ式継手などが採用できる。なお、プッシュグリップ式継手は、楔を応用したピン方式の継手で、挿入側のピンボルトを受入側の孔部に挿入して締結する継手であり、ピンボルトと受入れ孔部にはそれぞれ噛み合い可能な鋸歯状の突部と凹部が連続して形成されている。 In the example of FIG. 1, a so-called inter-ring joint 40 is also provided in the main beam 11. As the inter-ring joint 40, a pin insertion joint that is easy to construct, such as a push grip joint, can be employed. A push-grip joint is a pin-type joint that uses a wedge, and is a joint that is inserted and tightened by inserting a pin bolt on the receiving side into the hole on the receiving side. A protruding portion and a concave portion are continuously formed.
また、セグメント１０、３０のトンネル周方向の端面１５においては、セグメントリング２０の形成時にセグメント同士をつなげる金具５０が備わっている。この金具５０としては、セグメント同士の前記端面１５すなわち突き合わせ接合面の対向位置に埋め込まれたＣ型の連結金具と、対向する両セグメントのＣ型連結金具の開口部に両側端部のフランジが係合するＩ型の連結金具とから構成される。Ｃ型連結金具の開口部にＩ型連結金具のフランジを係合させて嵌め込むことによって、セグメント同士の突き合わせ端面を相互に接合させて連結することとなる。なお、こうした金具５０は必ずしも必要ではなく、組み立て精度を向上させるため補助的に使用するものとなる。 Further, the end faces 15 of the segments 10 and 30 in the tunnel circumferential direction are provided with metal fittings 50 that connect the segments to each other when the segment ring 20 is formed. The metal fitting 50 includes a C-type coupling metal embedded at a position opposite to the end face 15 of the segments, that is, the butt joint surface, and flanges at both ends at the openings of the C-type coupling metal of both opposing segments. And an I-shaped coupling fitting. By engaging and fitting the flanges of the I-type connection fittings into the openings of the C-type connection fittings, the butted end surfaces of the segments are joined together and connected. Such a metal fitting 50 is not always necessary, and is used in an auxiliary manner in order to improve assembly accuracy.
図２は本実施形態における連結動作を示す図である。セグメント連結構造を構成する場合、上記構造を備える、例えば切羽側のセグメント１０を、これに対向する坑口側にあって、組み立て済みのセグメントリング２０における所定のセグメント対２１に対して、主桁同士で当接させることで、セグメント対２１（２つのセグメント３０から構成されている）の各主桁端部１８に備わる凸部対２２を、前記セグメント１０の挿通孔１２に挿入させることになる。 FIG. 2 is a diagram showing a connecting operation in the present embodiment. When configuring the segment connection structure, for example, the segment 10 on the face side provided with the above-described structure is located on the wellhead side opposite to the segment 10 and the main beams are arranged with respect to the predetermined segment pair 21 in the assembled segment ring 20. With this contact, the convex pair 22 provided at each main girder end 18 of the segment pair 21 (consisting of two segments 30) is inserted into the insertion hole 12 of the segment 10.
この挿入動作により、各セグメント３０の凸部１４からなる凸部対２２は、セグメント１０の挿通孔１２を貫いて、セグメント１０の内部に達する。この時、凸部対２２は、挿通孔１２を貫くと共に、拘束部材１３の開口１６にも到達している。当然、凸部対２２をなす各凸部１４は、主桁１１の肉厚と拘束部材１３の高さを考慮した突出長を有しており、この突出長のうち所定長分は拘束部材１３の開口内に到達するよう設計されている。また、拘束部材１３の開口１６は、挿通孔１２より小径だが凸部対２２の挿入は許容するサイズ、形状の開口となっている。 By this insertion operation, the convex portion pair 22 including the convex portion 14 of each segment 30 passes through the insertion hole 12 of the segment 10 and reaches the inside of the segment 10. At this time, the convex portion pair 22 penetrates the insertion hole 12 and also reaches the opening 16 of the restraining member 13. Naturally, each convex portion 14 forming the convex portion pair 22 has a protruding length in consideration of the thickness of the main beam 11 and the height of the restricting member 13, and a predetermined length of the protruding length is the restricting member 13. It is designed to reach into the opening. In addition, the opening 16 of the restraining member 13 is an opening having a size and shape that is smaller in diameter than the insertion hole 12 but allows the insertion of the convex pair 22.
拘束部材１３の開口１６に到達した凸部対２２は、拘束部材１３の開口範囲でしか挙動出来ず、しかも、凸部対２２をなす各凸部１４が互いに離間する方向、すなわち、各凸部１４が主桁中央付近から端部に向かう方向への挙動は、拘束部材１３の開口終端１７で抑止される。つまり、凸部１４の挙動は拘束部材１３により拘束される。 The convex portion pair 22 that has reached the opening 16 of the restraining member 13 can only behave within the opening range of the restraining member 13, and the convex portions 14 forming the convex portion pair 22 are separated from each other, that is, each convex portion. The behavior of 14 in the direction from the center of the main girder toward the end is restrained by the opening end 17 of the restraining member 13. That is, the behavior of the convex portion 14 is restrained by the restraining member 13.
また、上記の動作に伴い、凸部対２２の挿通孔１２への挿入と同様に、セグメント１０の主桁両端１８に備わる各凸部１４は、前記セグメント対２１の各主桁中央３３に備わる挿通孔１２に挿入されることになる。また、このセグメント１０とトンネル周方向の端面１５で他セグメントを突き合わせ接合すれば、この他セグメントの主桁端に備わる凸部も、上記同様、前記セグメント対２１の主桁中央３３に備わる挿通孔１２に挿入されることになり、セグメント１０と他セグメントとの連結構造が形成される。 Further, along with the above operation, each protrusion 14 provided at both ends 18 of the main beam of the segment 10 is provided at the center 33 of each main beam of the segment pair 21 in the same manner as the insertion of the protrusion 22 into the insertion hole 12. It will be inserted into the insertion hole 12. Further, if another segment is abutted and joined to the segment 10 at the end surface 15 in the circumferential direction of the tunnel, the projection provided on the main girder end of the other segment also has an insertion hole provided in the center girder center 33 of the segment pair 21 as described above. 12 is inserted, and the connection structure of the segment 10 and another segment is formed.
こうした本実施形態によれば、セグメント主桁１１の挿通孔１２に挿入された、対向するセグメント対２１すなわち連結対象のセグメントリング２０（をなす一対のセグメント）から突出する凸部対２２が、この凸部対２２をなす各凸部１４の離間を許容しない形で前記拘束部材１３により拘束される。つまり、凸部対２２の拘束がなされることで、凸部対２２をなす各凸部１４を有するセグメント対２１の拘束もなされることになる。この場合、セグメント対２１が離間しようとする際の力は、前記挿通孔１２すなわちセグメント主桁１１が負担することなく、前記拘束部材１３が負担する。従って、セグメント連結構造１を構成する為に、従来技術の如くセグメント主桁１１の肉厚や桁高を大きくする必要はない。従って、セグメントにおける特段の補強を必要とせずに、セグメント間の効率的かつ確実な連結が可能となる。また、セグメントリングを構成する各セグメント１０の全ては、対向するセグメントリング２０におけるセグメント３０との間において上述の拘束部材１３による凸部対２１の拘束による連結構造を互いに構成することが可能となる。 According to this embodiment, the convex pair 22 protruding from the opposing segment pair 21, that is, the segment ring 20 (a pair of segments) to be connected, inserted into the insertion hole 12 of the segment main beam 11, It is restrained by the restraining member 13 in a form that does not allow separation of the convex portions 14 forming the convex portion pair 22. That is, by restricting the convex portion pair 22, the segment pair 21 having the convex portions 14 forming the convex portion pair 22 is also constrained. In this case, the force when the segment pair 21 is about to be separated is borne by the restraining member 13 without being borne by the insertion hole 12, that is, the segment main beam 11. Therefore, it is not necessary to increase the thickness and the height of the segment main beam 11 as in the prior art in order to configure the segment connection structure 1. Therefore, efficient and reliable connection between segments is possible without requiring special reinforcement in the segments. Further, all of the segments 10 constituting the segment ring can mutually form a connection structure by restraining the convex portion pair 21 by the restraining member 13 with the segment 30 in the opposing segment ring 20. .
図３は本実施形態における他の拘束部材例を示す図である。図１、２で例示した拘束部材１３は、挿通孔１２より小径だが凸部対２２の挿入は許容する開口１６を２つ備えた部材であった。だが拘束部材１３としては、こうした形状に限定されず、例えば、図３に示すように、開口１６が１つのみで環状のもの、或いは、フック材で構成され半環状のもの、などが採用できる。勿論、凸部対２２の外周を押さえて、凸部同士の離間を拘束する構造であればその他の構造を備える拘束部材を採用することもできる。 FIG. 3 is a view showing another example of a restraining member in the present embodiment. The restraint member 13 illustrated in FIGS. 1 and 2 is a member having two openings 16 having a diameter smaller than that of the insertion hole 12 but allowing insertion of the convex portion pair 22. However, the constraining member 13 is not limited to such a shape, and for example, as shown in FIG. 3, an annular member having only one opening 16 or a semi-annular member made of a hook material can be employed. . Of course, a restraining member having another structure may be employed as long as it holds the outer periphery of the convex portion pair 22 and restrains the separation between the convex portions.
また、拘束部材１３を構成する部材は、凸部対２２をなす各凸部１４が互いに離間しようとする方向の力、すなわちセグメントリング２０においてセグメント対２１をなすセグメント同士が離間しようとする力に対抗しうる適宜な強度を備えたものであればよい。例えば、鋼製などの金属製、樹脂製、炭素繊維製、であることが考えられる。 In addition, the member constituting the restraining member 13 is a force in a direction in which the convex portions 14 constituting the convex portion pair 22 try to separate from each other, that is, a force in which the segments constituting the segment pair 21 in the segment ring 20 try to separate from each other. What is necessary is just to have appropriate strength that can be countered. For example, it may be made of metal such as steel, resin, or carbon fiber.
また、拘束部材１３をセグメント内に配置する場合、例えば、拘束部材１３を主桁１１に点溶接する手法の他、接着剤により拘束部材１３と主桁１１とを接着固定する手法なども採用できる。或いは、セグメント形成用のコンクリート打設にあわせて、拘束部材１３を、所定治具などを介してセグメント内の挿通孔周囲に係止しておき、コンクリート中での埋め込み固定を図る形態なども採用できる。 In addition, when the restraining member 13 is disposed in the segment, for example, a technique in which the restraining member 13 and the main girder 11 are bonded and fixed with an adhesive can be employed in addition to a technique of spot welding the restraining member 13 to the main girder 11. . Alternatively, a configuration in which the restraining member 13 is locked around the insertion hole in the segment via a predetermined jig or the like in accordance with the placement of the concrete for forming the segment, and is used for embedding and fixing in the concrete. it can.
なお、シールドジャッキ（図示せず）と凸部１４との無用な接触を回避し作業性を高める意味で、図４に示すように、例えばセグメント１０における切羽側の主桁１１ａには凸部１４を設けないとしてもよい。この場合、前記主桁１１ａには、主桁両端１８および主桁中央３３の挿通孔１２と、主桁中央３３の挿通孔１２に開口１６が連通する拘束部材１３とが備わっている。一方、坑口側の主桁１１ｂには、主桁両端１８の凸部１４および主桁中央３３の凸部対２６が備わっている。 In order to avoid unnecessary contact between the shield jack (not shown) and the convex portion 14 and improve workability, for example, as shown in FIG. May not be provided. In this case, the main girder 11 a is provided with an insertion hole 12 in the main girder both ends 18 and the main girder center 33, and a restraining member 13 having an opening 16 communicating with the insertion hole 12 in the main girder center 33. On the other hand, the main girder 11b on the wellhead side is provided with a convex portion 14 at both ends 18 of the main girder and a convex portion pair 26 at the center 33 of the main girder.
こうした構成において、例えば切羽側のセグメント１０を、このセグメントとトンネル軸方向に隣接し坑口側にある所定セグメント６０に対して、主桁同士で当接させることで、セグメント１０の主桁端部１８に備わる凸部１４を、前記セグメント６０の主桁中央３３における挿通孔１２に挿入させることになる。また、前記セグメント１０とトンネル周方向に連結するセグメント７０も同様に、前記セグメント１０と隣接する主桁端部１８に備わる凸部１４を、前記セグメント６０の主桁中央３３における挿通孔１２に挿入させる。セグメント１０およびセグメント７０の前記各凸部１４をもって凸部対２２とみなすことができる。前記挿入動作により、図１に基づく上記実施形態と同様に、凸部対２２はセグメント６０の拘束部材１３の開口範囲でしか挙動出来ず、凸部対２２をなす各凸部１４が互いに離間する方向、すなわち、各凸部１４を有するセグメント１０およびセグメント７０が互いに離間しようとする方向への挙動が抑止される。 In such a configuration, for example, the main spar end 18 of the segment 10 is brought into contact with the predetermined segment 60 adjacent to the segment 10 in the tunnel axial direction and on the wellhead side with the main spar. The convex portion 14 included in the segment 60 is inserted into the insertion hole 12 in the central girder center 33 of the segment 60. Similarly, in the segment 70 connected to the segment 10 in the circumferential direction of the tunnel, the convex portion 14 provided on the main girder end 18 adjacent to the segment 10 is inserted into the insertion hole 12 in the center 33 of the main girder of the segment 60. Let The convex portions 14 of the segment 10 and the segment 70 can be regarded as the convex portion pair 22. Due to the insertion operation, as in the above-described embodiment based on FIG. 1, the convex portion pair 22 can only behave within the opening range of the restraining member 13 of the segment 60, and the convex portions 14 forming the convex portion pair 22 are separated from each other. The behavior in the direction, that is, the direction in which the segment 10 and the segment 70 having the respective convex portions 14 tend to be separated from each other is suppressed.
また、上記の動作に伴い、前記凸部対２２の挿通孔１２への挿入と同様に、セグメント１０やセグメント７０の主桁中央３３に備わる凸部対２６をなす一方の凸部１４は、前記セグメント６０の主桁両端１８に備わる挿通孔１２に挿入されることになる。前記凸部対２６をなす他方の凸部１４は、前記セグメント６０とトンネル周方向に連結されている他セグメント８０の主桁端に備わる挿通孔１２に挿入されることになる。これにより、前記凸部対２６が、セグメント６０および他セグメント８０を挿通孔１２を介して拘束し、セグメント６０とセグメント８０との離間を抑止することになる。 Further, along with the above operation, as in the insertion of the convex portion pair 22 into the insertion hole 12, one convex portion 14 forming the convex portion pair 26 provided in the main girder center 33 of the segment 10 or the segment 70 is The segment 60 is inserted into the insertion hole 12 provided at both ends 18 of the main beam. The other convex portion 14 forming the convex pair 26 is inserted into the insertion hole 12 provided at the main beam end of the other segment 80 connected to the segment 60 in the tunnel circumferential direction. Thereby, the convex portion pair 26 restrains the segment 60 and the other segment 80 through the insertion hole 12 and suppresses the separation between the segment 60 and the segment 80.
以上、本実施形態によれば、セグメントにおける特段の補強を必要とせずに、セグメント間の効率的かつ確実な連結が可能となる。 As described above, according to the present embodiment, efficient and reliable connection between segments is possible without requiring special reinforcement in the segments.
本発明の実施の形態について、その実施の形態に基づき具体的に説明したが、これに限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。 Although the embodiment of the present invention has been specifically described based on the embodiment, the present invention is not limited to this, and various modifications can be made without departing from the scope of the invention.
１ 連結構造
４ 鋼殻
５ コンクリート
１０、６０ セグメント
１１ 主桁
１１ａ 切羽側の主桁
１１ｂ 坑口側の主桁
１２ 挿通孔
１３ 拘束部材
１４ 凸部
１５ セグメントのトンネル周方向の端面
１６ 拘束部材の開口
１７ 拘束部材の開口終端
１８ セグメントの主桁両端
２０ セグメントリング
２１ セグメント対
２２、２６ 凸部対
３０ 対向するセグメント
３３ セグメント対の各主桁中央
４０ リング間継手
５０ 金具
８０ 他セグメント
DESCRIPTION OF SYMBOLS 1 Connection structure 4 Steel shell 5 Concrete 10, 60 Segment 11 Main girder 11a Face side main girder 11b Main entrance side girder 12 Insertion hole 13 Constraining member 14 Convex part 15 End surface 16 of a tunnel circumferential direction of a segment 17 Constraining member opening 17 Opening end 18 of constraining member Both ends of main girder of segment 20 Segment ring 21 Segment pair 22, 26 Convex portion 30 Opposing segment 33 Center of each main girder of segment pair 40 Inter-ring joint 50 Bracket 80 Other segment
Claims (3)
前記拘束部材が、前記所定セグメントにおける前記挿通孔と連通する主桁裏側に配置され、前記挿通孔より小径かつ前記凸部対の挿入は許容するサイズ及び形状の開口と、前記凸部対の突出長のうち所定長分を収容する高さの内空とを備えるものである、
ことを特徴とするセグメント連結構造。 The predetermined segment is brought into contact with each other with the main beam straddling the two segments adjacent to the predetermined segment in the tunnel axis direction, so that the pair of convex portions provided at the end portions of the main beams of the two segments In the segment connection structure formed by inserting the convex portion pair that is inserted into the insertion hole provided in the main girder and protrudes into the predetermined segment through the insertion hole by a restriction member,
The constraining member is disposed on the back side of the main beam communicating with the insertion hole in the predetermined segment, and has an opening having a size and shape smaller than the insertion hole and allowing the insertion of the convex portion pair, and the protrusion of the convex portion pair. An inner space with a height that accommodates a predetermined length of the length,
Segment connection structure characterized by this.
前記セグメントの主桁は、挿通孔に加えて、両端において凸部を備えるものであり、
前記セグメントを、当該セグメントとトンネル軸方向に隣接する２つのセグメントに跨って主桁同士で当接させることで、前記２つのセグメントの各主桁端部に備わる凸部対を前記挿通孔に挿入して、前記挿通孔を介しセグメント内に突出した前記凸部対を前記拘束部材により拘束すると共に、前記セグメントの主桁両端に備わる各凸部を、前記２つのセグメントの各主桁に備わる挿通孔に挿入してなる、ことを特徴とするセグメント連結構造。 In claim 1,
The main girder of the segment is provided with convex portions at both ends in addition to the insertion hole,
The segment is brought into contact with each other across the two segments adjacent to the segment in the tunnel axis direction, so that a pair of convex portions provided at the ends of the main beams of the two segments is inserted into the insertion hole. The convex portion pair protruding into the segment through the insertion hole is constrained by the restraining member, and the convex portions provided at both ends of the main girder of the segment are provided in the main girder of the two segments. A segment connecting structure characterized by being inserted into a hole.
前記拘束部材は、前記所定セグメントの主桁裏側と点溶接または接着材で固定されていることを特徴とするセグメント連結構造。The segment connecting structure, wherein the restraining member is fixed to the back side of the main beam of the predetermined segment by spot welding or an adhesive.
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| JPH0941884A (en) * | 1995-07-26 | 1997-02-10 | Ishikawajima Constr Materials Co Ltd | Segment and lining method using the segment |
| JPH11193693A (en) * | 1998-01-05 | 1999-07-21 | Yoshiji Matsumoto | Segment joint structure, segment and segment assembling method |
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