JP4485415B2 - Connection structure, shield tunnel and shield tunnel construction method - Google Patents

Connection structure, shield tunnel and shield tunnel construction method Download PDF

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JP4485415B2
JP4485415B2 JP2005172754A JP2005172754A JP4485415B2 JP 4485415 B2 JP4485415 B2 JP 4485415B2 JP 2005172754 A JP2005172754 A JP 2005172754A JP 2005172754 A JP2005172754 A JP 2005172754A JP 4485415 B2 JP4485415 B2 JP 4485415B2
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steel pipe
segment
female member
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connection structure
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普史 小川
修 望月
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Taisei Corp
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Description

本発明は、2つの部材の接続構造と、該接続構造がセグメント同士の接続に適用されたシールドトンネル、およびシールドトンネルの構築方法に係り、特に、地震時の正負交番荷重に対する耐震性能が高く、さらには、仮固定部と所望の接続強度を有する固定部との双方を兼ね備えた構成とすることで、部材接続時の部材姿勢の調整や誤組付けへの対処が容易となる接続構造およびシールドトンネルおよびシールドトンネルの構築方法に関するものである。   The present invention relates to a connection structure of two members, a shield tunnel in which the connection structure is applied to connection between segments, and a method of constructing a shield tunnel, and in particular, has high seismic performance against positive and negative alternating loads during an earthquake, Furthermore, a connection structure and a shield that make it easy to adjust the posture of the member when connecting the member and to cope with incorrect assembly by combining the temporary fixing portion and the fixing portion having the desired connection strength. The present invention relates to a tunnel and a shield tunnel construction method.

特に都市部を中心に地下空間の利用は活性化の一途を辿っており、地下道や地下鉄路線、ガスや上下水道用のトンネルをはじめとするインフラ施設は勿論のこと、アミューズメント施設や居住空間としての巨大地下空間の開発も進んでいる。かかる地下施設の建設に際しては、これまで、地上を広範にわたって占有し、開削工法にて所望深度までの掘削を完了した後にトンネルの敷設や構造物の建設がおこなわれていた。かかる開削工法により、地上交通への影響や開削による周辺地盤への影響などが大きな問題となっており、かかる問題を解決する地下トンネル/地下構造物の構築方法としてシールド工法や推進工法が現在の主流な工法となってきている。   In particular, the use of underground spaces has been revitalized, especially in urban areas, and it is used not only for infrastructure facilities such as underground passages, subway lines, and tunnels for gas and water and sewage, but also as amusement facilities and living spaces. Development of a huge underground space is also progressing. In the construction of such underground facilities, tunnels and structures have been constructed after occupying the ground extensively and completing excavation to the desired depth by the open-cut method. Due to the excavation method, the impact on ground traffic and the impact on the surrounding ground due to excavation have become major problems. The shield tunneling method and the propulsion method are the current methods for constructing underground tunnels / underground structures to solve such problems. It has become a mainstream construction method.

シールドトンネルは、コンクリート製または鋼製の複数のセグメントをリング方向とトンネル軸心方向に接続することで構成される。これまで、リング方向のセグメント同士の継手(セグメント継手)やトンネル軸心方向のセグメントリング同士の継手(リング継手)には、多様な継手構造が採用されている。例えば、特許文献1には、一方のセグメントに埋設された雌金具のインナーコレットチャック内へ他方のセグメントに埋設された雄金具のスタッドボルトを差し込むセグメント同士の接続構造が開示されている。スタッドボルトは、その突出先端部が拡張アンカー構造となっており、雌金具のセンターピンで拡張アンカーが押し開かれ、さらには、該アンカーの外周面に刻設された逆止爪が雌金具に食い付くことで接続強度を増した構造となっている。   The shield tunnel is configured by connecting a plurality of concrete or steel segments in the ring direction and the tunnel axis direction. Up to now, various joint structures have been employed for joints between segments in the ring direction (segment joints) and joints between segment rings in the tunnel axial direction (ring joints). For example, Patent Document 1 discloses a connection structure between segments in which a stud bolt of a male fitting embedded in the other segment is inserted into an inner collet chuck of a female fitting embedded in one segment. The stud bolt has an extension anchor structure at the protruding tip, the extension anchor is pushed open by the center pin of the female fitting, and the check pawls engraved on the outer peripheral surface of the anchor are attached to the female fitting. The connection strength is increased by biting.

特許文献2には、一方のセグメントに略C字状の雌継手がスリットを備えて埋設されており、他方のセグメントに略T字状の雄継手が接続面から突出した姿勢で埋設されており、両セグメントをスライドさせながら、雄継手をスリットを介して雌継手に嵌装させることで形成されるセグメントの接合構造が開示されている。   In Patent Document 2, a substantially C-shaped female joint is embedded in one segment with a slit, and a substantially T-shaped male joint is embedded in the other segment in a posture protruding from the connection surface. A joint structure of segments formed by fitting a male joint to a female joint via a slit while sliding both segments is disclosed.

さらに、出願人によって開示された特許文献3には、一方のセグメントに埋設された雌部材に他方のセグメントから突出した雄継手を圧着接続してなる接続構造が示されている。この発明は、従来の雄継手と雌継手の接続強度が双方の摩擦抵抗力によるものであり、したがって、この摩擦抵抗力以上の引張り力が作用した場合に、引抜き耐力が急激に低下し、セグメント同士の目開き量が急激に大きくなってしまうという従来の摩擦抵抗型の継手構造を見直したものである。雄継手内部に伸張可能なボルト部材を埋め込んでおき、このボルト部材の引張剛性を雄部材および雌部材間の摩擦抵抗力以下に設定しておく。かかる構成とすることで、双方の部材間に引張り力が作用した際に、摩擦抵抗力が作用する前にボルト部材が伸張することで継手の引抜き耐力の急激な低下を防止できるというものである。   Further, Patent Document 3 disclosed by the applicant discloses a connection structure in which a male joint protruding from the other segment is crimped to a female member embedded in one segment. In the present invention, the connection strength between the conventional male joint and the female joint is due to the frictional resistance of both, and therefore, when a tensile force greater than this frictional resistance acts, the pulling-out resistance is drastically reduced, and the segment This is a review of the conventional frictional resistance type joint structure in which the amount of openings between the two increases abruptly. An expandable bolt member is embedded in the male joint, and the tensile rigidity of the bolt member is set to be equal to or less than the frictional resistance force between the male member and the female member. By adopting such a configuration, when a tensile force acts between both members, the bolt member expands before the frictional resistance acts, thereby preventing a sudden drop in the pull-out strength of the joint. .

特開平10−238292号公報JP-A-10-238292 特開2000−328889号公報JP 2000-328889 A 特開2004−360445号公報JP 2004-360445 A

特許文献1〜3に開示のセグメントの接続構造によれば、セグメント同士を一度組付けてしまうと、それが誤組付けであったり、あるいは組付け姿勢を微調整しようとしても、継手同士が強固に接続されていることから、組付け姿勢の微調整などの作業は実質的に不可能である。特許文献1の発明では、雄部材を構成する拡張アンカーが雌部材に噛み合ってしまい、双方の継手を解体しなければ、セグメント同士の組付け姿勢の微調整はできない。また、特許文献2の発明では、一方のセグメントを他方のセグメントにスライドさせながら組付けが完了しているため、微調整に際しては、障害となるセグメントを逆にスライドさせながら接続を解除していかなければならない。特許文献3の発明では、伸張可能なボルト部材の伸張により、継手の引抜き耐力の急激な低下が防止できるものの、地震時の正負交番荷重によって雄部材を圧着させている雌部材の内空寸法が広げられると、当初の摩擦抵抗力を得ることができなくなり、結果としては、摩擦抵抗力がボルト部材の引張剛性よりも小さくなり、引抜き耐力の急激な低下が招来され得る。   According to the segment connection structure disclosed in Patent Documents 1 to 3, once the segments are assembled, the joints are strong even if they are misassembled or the assembly posture is finely adjusted. Therefore, operations such as fine adjustment of the assembly posture are virtually impossible. In the invention of Patent Document 1, the expansion anchor constituting the male member meshes with the female member, and the assembly posture between the segments cannot be finely adjusted unless both joints are disassembled. In the invention of Patent Document 2, since the assembly is completed while one segment is slid to the other segment, in fine adjustment, the connection may be released while the obstacle segment is slid in reverse. There must be. In the invention of Patent Document 3, although the pull-out strength of the joint can be prevented from abruptly decreasing due to the extension of the extendable bolt member, the inner dimension of the female member that presses the male member by the positive / negative alternating load at the time of earthquake is reduced. When spread, the initial frictional resistance cannot be obtained, and as a result, the frictional resistance becomes smaller than the tensile rigidity of the bolt member, which can lead to a rapid decrease in the pulling strength.

本発明の接続構造およびシールドトンネルおよびシールドトンネルの構築方法は、上記する問題に鑑みてなされたものであり、セグメントなどの部材同士の接続に際し、誤組付けや組付け姿勢の微調整を容易におこなうことができるとともに、高い部材間の接続強度を備えた接続構造およびシールドトンネルおよびシールドトンネルの構築方法を提供することを目的としている。   The connection structure, shield tunnel, and shield tunnel construction method of the present invention have been made in view of the above-described problems, and it is easy to make misassembly and fine adjustment of the assembly posture when connecting members such as segments. It is an object of the present invention to provide a connection structure, a shield tunnel, and a method for constructing a shield tunnel that can be performed and have high connection strength between members.

前記目的を達成すべく、本発明による接続構造は、第一の部材と第二の部材を繋ぐ接続構造であって、前記第一の部材には、その接続面に開口が臨んだ姿勢で該開口に連通する雌部材が埋め込まれており、前記第二の部材には、その接続面から突出して前記雌部材に挿入される雄部材が設けられており、雄部材と雌部材にはそれぞれ、該雄部材が該雌部材に挿入された際に第一の部材と第二の部材を仮固定するための第一の固定手段と、所定の接続強度に接続するための第二の固定手段とが備えられていることを特徴とする。   In order to achieve the above object, a connection structure according to the present invention is a connection structure that connects a first member and a second member, and the first member has an opening facing the connection surface. A female member communicating with the opening is embedded, and the second member is provided with a male member that protrudes from its connecting surface and is inserted into the female member, and the male member and the female member are respectively First fixing means for temporarily fixing the first member and the second member when the male member is inserted into the female member; and second fixing means for connecting to a predetermined connection strength; Is provided.

第一の部材、第二の部材は特に限定されるものではなく、一方の部材の雌部材に他方の部材の雄部材が挿入されることで部材間の接続構造が形成される適宜の部材に適用可能である。また、双方の部材は、コンクリート製や鋼製、さらにはそれらの複合体など適宜の材料から成形できる。   The first member and the second member are not particularly limited, and the first member and the second member are appropriate members in which a connection structure between the members is formed by inserting the male member of the other member into the female member of one member. Applicable. Moreover, both members can be formed from an appropriate material such as concrete, steel, or a composite thereof.

本発明の接続構造では、2つの部材を一時的に仮固定するための第一の固定手段と、接続部が本来備えるべき接続強度にて接続される第二の固定手段との双方を有している。一方の部材の雄部材を他方の部材の雌部材に挿入することによって第一の固定手段で双方の部材が仮固定されるため、さらに他の部材の接続を必要とするような実施形態の場合には、一気にすべての部材同士をそれぞれの第一の固定手段で仮固定しておき、誤組付けや組付け姿勢の微調整が必要となった段階で仮固定状態を容易に解除して適宜の組付け調整をおこなうことができる。   In the connection structure of the present invention, both the first fixing means for temporarily fixing the two members temporarily and the second fixing means connected at the connection strength that the connection portion should originally have are provided. ing. In the case of an embodiment in which both the members are temporarily fixed by the first fixing means by inserting the male member of one member into the female member of the other member, and thus the connection of the other member is required. For example, if all the members are temporarily fixed with the first fixing means at once, the temporary fixed state can be easily released at the stage when incorrect assembly or fine adjustment of the assembly posture is required. Assembling adjustment can be performed.

部材の組付け姿勢の微調整などをおこなった後に、第二の固定手段にて所望の接続強度にて双方の部材を接続する。本発明のように、組付け時に部材同士を仮固定する第一の固定手段と、最終的に所望の接続強度にて接続する第二の固定手段との双方を備えた接続構造とすることで、複数部材を組付ける際の誤組み付けへの臨機な対応や組付け姿勢の容易な微調整を可能とでき、かつ、所望の接続強度を得ることが可能となる。   After fine adjustment of the assembly posture of the members, both members are connected with a desired connection strength by the second fixing means. As in the present invention, by providing a connection structure including both first fixing means for temporarily fixing members at the time of assembly and second fixing means for finally connecting with a desired connection strength. In addition, it is possible to respond flexibly to erroneous assembly when assembling a plurality of members and to easily finely adjust the assembly posture, and to obtain a desired connection strength.

また、本発明による接続構造の他の実施形態において、前記第一の固定手段は、雌部材を構成する第一の中空体と、雄部材を構成して該第一の中空体に嵌合可能な第一の棒部材とからなり、前記第二の固定手段は、雌部材を構成して第一の中空体よりも内空寸法の大きな第二の中空体と、雄部材を構成し、流体が充填されることによって該第二の中空体内で膨らむことで第二の中空体の内壁を押圧可能な第二の棒部材とからなることを特徴とする。   In another embodiment of the connection structure according to the present invention, the first fixing means can be fitted into the first hollow body constituting the female member and the first hollow body constituting the male member. The second fixing means comprises a female member, a second hollow body having a larger inner dimension than the first hollow body, and a male member. It is characterized by comprising a second rod member capable of pressing the inner wall of the second hollow body by being expanded in the second hollow body by being filled.

一方の部材内に埋設される雌部材は、例えば内空寸法の異なる複数の中空体が一体成形された実施形態を適用できる。例えば、2つの同径の中空の筒体と、該2つの筒体に介装され、該筒体よりも大径の筒体からなる雌部材とする。一方、雄部材は、2つの同径の中空の筒体にそれぞれ嵌合する棒部材であって、該棒部材のうち、大径の筒体内に位置する部分は流体を加圧充填することによって膨張可能な部材とする。加圧流体は、例えば水を使用でき、膨張可能であってかつ接続強度の高い部材としては、折り曲げ部を備えた鋼管などが適応できる。流体を鋼管内に加圧充填することにより、鋼管の折り曲げ部が外側に押出されることによって鋼管が外側に膨らむことができ、外側に膨らんだ鋼管が大径の筒体と当接し、さらには相互に押圧した状態となることで双方の部材が強固に接続される。ここで、雌部材の構成部材(大径/小径の筒体)も鋼製材料などの金物から製作できる。なお、かかる雌部材をコンクリート製の部材内に埋め込んでなる実施形態においては、大径の筒体の両側は相対的に小径の筒体となっているため、地震時の正負交番荷重に対しては、膨らんだ鋼管が大径の筒体内で拘束され、鋼管(雄部材)に正負交番の引張り荷重が作用した際には、鋼管から大径の筒体へ荷重が伝達され、大径の筒体からコンクリート部材内に支圧荷重として伝達される。   For example, an embodiment in which a plurality of hollow bodies having different inner dimensions are integrally formed can be applied to the female member embedded in one member. For example, two hollow cylinders having the same diameter and a female member that is interposed between the two cylinders and has a larger diameter than the cylinder. On the other hand, the male member is a rod member that fits into two hollow cylinders having the same diameter, and a portion of the rod member that is located in the large-diameter cylinder is pressurized and filled with fluid. An inflatable member. As the pressurized fluid, for example, water can be used, and as a member that can be expanded and has high connection strength, a steel pipe having a bent portion can be applied. By pressurizing and filling the fluid into the steel pipe, the bent portion of the steel pipe is pushed outward so that the steel pipe can expand outward, the steel pipe expanded outward contacts the large-diameter cylinder, and further Both members are firmly connected by being pressed against each other. Here, the structural member (large diameter / small diameter cylinder) of the female member can also be manufactured from a hardware such as a steel material. In the embodiment in which such a female member is embedded in a concrete member, both sides of the large-diameter cylinder are relatively small-diameter cylinders. The expanded steel pipe is restrained in a large-diameter cylinder, and when a positive and negative alternating tensile load acts on the steel pipe (male member), the load is transmitted from the steel pipe to the large-diameter cylinder, and the large-diameter cylinder It is transmitted as a bearing load from the body into the concrete member.

雌部材を構成する小径の筒体とその間に嵌合された棒部材によって部材同士の仮固定をおこなうことができ、複数の部材の組付け姿勢の微調整などの後にこの棒部材内に流体を加圧充填することで雌部材を構成する大径の筒体内に位置する棒部材を外側へ膨らませて該棒部材と筒体とを相互に押圧させることにより、所望の接続強度を得ることができる。   The members can be temporarily fixed by the small-diameter cylindrical body constituting the female member and the rod member fitted between them, and the fluid is put into the rod member after fine adjustment of the assembly posture of the plurality of members. The desired connection strength can be obtained by inflating the rod member located in the large-diameter cylinder constituting the female member by pressurizing and pressing the rod member and the cylinder together. .

また、本発明による接続構造の他の実施形態において、前記雌部材は、2つの筒状金物と、該筒状金物の間に介装されるとともに該筒状金物の直径よりも大きな直径を有する中空の拡幅金物とが一体成形されており、前記雄部材は、前記筒状金物の内径と同一または略同一の外径を有する筒体でその一端が閉塞された2つの被せ金物と、該2つの被せ金物がその両端に嵌合された膨張性の鋼管とからなり、該鋼管は、雄部材が雌部材に挿入される際はその断面が凹型に織り込まれており、該鋼管内に流体を充填することにより、少なくとも中空の拡幅金物内に位置する鋼管の凹型に織り込まれた部分が外側に押圧されて膨らむことにより、中空の拡幅金物の内壁面を膨らんだ鋼管が押圧して雌部材と雄部材が所定の接続強度に接続されることを特徴とする。   Moreover, in another embodiment of the connection structure according to the present invention, the female member is interposed between two cylindrical hardware and the cylindrical hardware and has a diameter larger than the diameter of the cylindrical hardware. A hollow wide metal piece is integrally formed, and the male member has two cover pieces whose one ends are closed by a cylindrical body having the same or substantially the same outer diameter as the inner diameter of the cylindrical metal piece. The two steel covers are inflatable steel pipes fitted at both ends, and the steel pipe is woven in a concave shape when the male member is inserted into the female member, and fluid is introduced into the steel pipe. By filling, at least the portion woven in the concave shape of the steel pipe located in the hollow wide metal fitting is pressed outward and bulges, so that the steel pipe that swells the inner wall surface of the hollow wide metal fitting presses the female member. The male member is connected to the specified connection strength And features.

雌部材は、中空球体に穿設された2つの開口と連通するように一端が閉塞された筒体の開放端が繋げられた構成となっており、この雌部材は鋼製材料にて一体成形されている。ここで、球体の開口は球体中心に対して対向する位置、すなわち任意の直径線状に設けられており、該中空球体に繋がる一方の筒体の他端は閉塞されていない。すなわち、この筒体の開口を介して他方の部材の接続面から突出する雄部材が挿入できるようになっている。   The female member has a structure in which an open end of a cylinder whose one end is closed so as to communicate with two openings formed in the hollow sphere is connected, and the female member is integrally formed of a steel material. Has been. Here, the opening of the sphere is provided at a position opposed to the center of the sphere, that is, in an arbitrary diameter line shape, and the other end of one cylinder connected to the hollow sphere is not closed. That is, a male member protruding from the connection surface of the other member can be inserted through the opening of the cylindrical body.

雄部材は、雌部材の長さと同程度の長さを有した鋼管からなり、その全長にわたって断面の一部が凹型に織り込まれており、この織り込まれた姿勢で、該鋼管の断面寸法が雌部材の筒状金物の内空寸法と同程度の大きさとなるように形成されている。この鋼管が筒状金物内に嵌合されることで雄部材と雌部材とを仮固定でき、鋼管内に流体を加圧充填することにより、鋼管内部に織り込まれた凹部が外側に押圧されることで鋼管が膨らみ、特に、雌部材を構成する中空拡幅内に位置する鋼管が膨らんだ姿勢で双方が相互に押圧しながら圧着することができる。ここで拡幅金物は、少なくとも筒状金物よりも寸法が大きい態様であれば任意の形状および寸法に設定することができ、その形状は例えば、球体や筒状金物よりも径の大きな筒体などとすることができる。   The male member is a steel pipe having a length approximately equal to the length of the female member, and a part of the cross section is woven into a concave shape over the entire length, and in this woven posture, the cross-sectional dimension of the steel pipe is female. It is formed so as to have the same size as the inner dimension of the cylindrical hardware of the member. By fitting the steel pipe into the cylindrical hardware, the male member and the female member can be temporarily fixed. By pressurizing and filling the fluid into the steel pipe, the concave portion woven into the steel pipe is pressed outward. Thus, the steel pipe swells, and in particular, the steel pipe located in the hollow widening constituting the female member swells and can be pressure-bonded while pressing each other. Here, the widened hardware can be set to any shape and dimensions as long as the dimensions are at least larger than the cylindrical hardware, and the shape is, for example, a sphere or a cylindrical body having a larger diameter than the cylindrical hardware. can do.

なお、雄部材を構成する鋼管の一部には、該鋼管内に流体を加圧充填するための充填口が設けられており、さらには、該雄部材のうち、部材内部に埋め込まれている部分には適宜の定着金物(L型やC型のフック形状の棒状金物や支圧プレートなど)が設けられているのが望ましい。   A part of the steel pipe constituting the male member is provided with a filling port for pressurizing and filling a fluid into the steel pipe, and further, the male member is embedded inside the member. It is desirable that an appropriate fixing hardware (such as a L-shaped or C-shaped hook-shaped hardware or a support plate) is provided in the portion.

また、本発明による接続構造の他の実施形態において、前記流体が、無収縮モルタルを含む無収縮性の材料からなることを特徴とする。   In another embodiment of the connection structure according to the present invention, the fluid is made of a non-shrinkable material including a non-shrink mortar.

無収縮モルタルなどの無収縮性の材料を鋼管内に加圧充填することにより、充填材が硬化した後も膨らんだ鋼管を内部から確実に押圧した状態を維持することができるため、部材同士の強固な接続構造を形成することが可能となる。   By pressurizing and filling a non-shrinkable material such as non-shrink mortar into the steel pipe, it is possible to maintain the state in which the steel pipe that has expanded after the filler has hardened is reliably pressed from the inside. A strong connection structure can be formed.

また、本発明による接続構造の他の実施形態において、前記第一の部材と前記第二の部材が、シールドトンネル用のセグメントであることを特徴とする。   In another embodiment of the connection structure according to the present invention, the first member and the second member are segments for a shield tunnel.

シールドトンネル用のセグメントの場合には、リング方向に複数のセグメントをエレクタにて組立てながら、かかるリング状のセグメントをトンネル軸心方向に接続することによってシールドトンネルが構築される。本発明の接続構造、すなわち、仮固定するための手段と、所望の接続強度にて接続する接続手段との双方を備えた接続構造をセグメント同士の接続構造に適用することにより、一気にシールドトンネルを仮固定していき、トンネル掘進中に、雄部材内に無収縮モルタルなどを加圧充填して確実なセグメント間の接続をおこなうことが可能となり、セグメント組付け時の微調整を可能としながら、工期を長期化することのないシールドトンネルの構築を可能とできる。該接続構造は、セグメントのリング継手面やセグメント継手面の双方に適宜の数量設置することができる。なお、シールドトンネル用のセグメントのほかに、推進工法にて適用されるセグメントにも本発明の接続構造が適用できることは勿論のことである。   In the case of a shield tunnel segment, a shield tunnel is constructed by connecting a plurality of segments in the ring direction with an erector and connecting the ring-shaped segments in the tunnel axial direction. By applying the connection structure of the present invention, that is, the connection structure having both the means for temporarily fixing and the connection means for connecting at a desired connection strength to the connection structure between the segments, the shield tunnel can be formed at once. While temporarily fixed, during tunnel excavation, it is possible to press-fill non-shrink mortar etc. into the male member and make sure connections between segments, and fine adjustment during segment assembly is possible, It is possible to construct a shield tunnel without extending the construction period. An appropriate number of the connection structures can be installed on both the ring joint surface and the segment joint surface of the segment. Needless to say, the connection structure of the present invention can be applied not only to the shield tunnel segment but also to the segment applied by the propulsion method.

さらに、本発明によるシールドトンネルの構築方法は、シールドトンネルを構成するセグメント同士のリング方向および/またはトンネル軸心方向の接続構造において、一方のセグメントの接続面には、2つの筒状金物と、該筒状金物の間に介装されるとともに該筒状金物の直径よりも大きな直径を有する中空の拡幅金物とが一体成形されてなる雌部材が埋め込まれており、他方のセグメントの接続面には、前記筒状金物の内径と同一または略同一の外径を有する筒体で一端が閉塞された2つの被せ金物と、該2つの被せ金物がその両端に嵌合されるとともにその断面が凹型に織り込まれている鋼管とからなる雄部材が接続面から突出した姿勢で設けられており、雄部材と雌部材とを接続することによって構築するシールドトンネルの構築方法であって、一方のセグメントの接続面の雌部材を構成する筒状金物に他方のセグメントの接続面の雄部材を構成する被せ金物を嵌合させることにより、トンネルのリング方向および/またはトンネル軸心方向に所定数のセグメントを仮接続していき、必要に応じて筒状金物と被せ金物との嵌合姿勢を相対的にずらすことによって所望のセグメント組付け姿勢を形成し、無収縮性の流体を鋼管内に加圧充填することにより、中空の拡幅金物内に位置する鋼管部分のうち、内側に織り込まれていた凹部が外側に押圧されることにより、該鋼管が外側に膨らんで拡幅金物の内壁面を押圧し、双方のセグメントが所定の接続強度で接続されることを特徴とする。   Furthermore, the shield tunnel construction method according to the present invention is a connection structure in the ring direction and / or tunnel axis direction between the segments constituting the shield tunnel, and on the connection surface of one segment, two cylindrical hardwares, A female member, which is interposed between the cylindrical hardware and integrally formed with a hollow widened metal having a diameter larger than the diameter of the cylindrical hardware, is embedded, and is connected to the connection surface of the other segment. Are two coverings whose one ends are closed by a cylindrical body having the same or substantially the same outer diameter as the inner diameter of the cylindrical fitting, and the two coverings are fitted to both ends and the cross section is concave. A shield tunnel constructed by connecting a male member and a female member, with a male member made of a steel pipe woven into In this case, by fitting the covering metal constituting the male member of the connecting surface of the other segment to the cylindrical hardware constituting the female member of the connecting surface of one segment, the ring direction of the tunnel and / or the tunnel axis A predetermined number of segments are temporarily connected in the center direction, and a desired segment assembling posture is formed by relatively shifting the fitting posture of the cylindrical hardware and the covering hardware as necessary. By pressurizing and filling the fluid into the steel pipe, the steel pipe portion located inside the hollow wide metal fitting is pressed outward so that the steel pipe expands outward and the wide metal fitting. The inner wall surface is pressed, and both segments are connected with a predetermined connection strength.

シールドマシン内のエレクタ装置によるセグメントの組付けに際し、リング方向のセグメント組付けやリング状のセグメントのトンネル軸心方向の組付けに際しては、そのセグメントの微調整は組付け上必須の作業となる。そこで、雄部材と雌部材の双方の仮固定手段で所定数のセグメントを一気に組み付けていき、必要に応じて筒状金物と被せ金物との嵌合姿勢を相対的にずらすことによって所望のセグメント組付け姿勢を形成させた後に、雄部材を構成する鋼管内に無収縮モルタル等を加圧充填し、該モルタルの強度が発現することにより、セグメント同士の接続が完了する。   When the segments are assembled by the erector device in the shield machine, fine adjustment of the segments is indispensable in assembling the segments in the ring direction and the ring-shaped segments in the tunnel axis direction. Therefore, a predetermined number of segments are assembled at once by the temporary fixing means of both the male member and the female member, and a desired segment group is obtained by relatively shifting the fitting posture of the cylindrical hardware and the covering hardware as necessary. After forming the attachment posture, the steel pipe constituting the male member is pressure-filled with non-shrink mortar and the strength of the mortar is developed, thereby completing the connection between the segments.

以上の説明から理解できるように、本発明の接続構造およびシールドトンネルおよびシールドトンネルの構築方法によれば、接続される一方の部材に埋設された雌部材と他方の部材から突出する雄部材との双方に仮固定手段と、所望の接続強度の接続手段とを備えた構成とすることで、部材接続時の組付け姿勢の微調整や誤組付け時の対処も十分におこなうことが可能となり、さらに、高い接続強度を得ることができる。この接続強度は、雌部材が相対的に小寸法の中空部分と相対的に大寸法の中空部分から構成され、雄部材を構成する膨張可能な棒部材が大寸法の中空部分内で膨らむことにより、双方の部材が相互に押圧されることによってもたらされる。かかる構成とすることで、この大寸法の中空部分内に膨張した棒部材が移動不可の状態に嵌め込まれた形態となるため、例えば、地震時の正負交番荷重に対しても、その耐震性能は極めて高いものとなる。   As can be understood from the above description, according to the connection structure, shield tunnel, and shield tunnel construction method of the present invention, a female member embedded in one member to be connected and a male member protruding from the other member By having a configuration with temporary fixing means and connection means of desired connection strength on both sides, it becomes possible to perform fine adjustment of the assembly posture at the time of member connection and countermeasures at the time of incorrect assembly, Furthermore, high connection strength can be obtained. This connection strength is determined by the fact that the female member is composed of a relatively small sized hollow portion and a relatively large sized hollow portion, and the expandable rod member constituting the male member swells within the large sized hollow portion. This is caused by pressing both members against each other. By adopting such a configuration, since the bar member expanded in the large-sized hollow portion is fitted in a non-movable state, for example, even with respect to positive and negative alternating loads during an earthquake, the seismic performance is Extremely expensive.

以下、図面を参照して本発明の実施の形態を説明する。図1は、セグメント同士を接続している状況を示した斜視図を、図2は、一方のセグメントに埋設された雌部材を示した縦断図を、図3は、他方のセグメントに埋設された雄部材を示した斜視図をそれぞれ示している。図4は、図3のIV−IV矢視図を、図5は、図4の状態から鋼管が外側に膨らんだ状態を示した断面図をそれぞれ示している。図6は、2つのセグメント同士を仮固定した状態を示した縦断図を、図7aは、2つのセグメント同士が接続された状態を示した縦断図を、図7bは、地震時に接続構造に作用する正負交番荷重(引張り力)とそれに対する抵抗力を示した縦断図をそれぞれ示している。なお、図示する接続構造は、シールドトンネル用のセグメントに適用した実施形態を示したものであり、かつ、リング継手のみに適用された形態を示しているが、本発明の接続構造がかかる実施形態に限定されるものでないことは勿論のことである。すなわち、セグメント以外の適宜の部材間の接続にも適用可能であり、リング継手とセグメント継手の双方に本発明の接続構造が適用されるセグメントであってもよい。   Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view showing a state in which segments are connected to each other, FIG. 2 is a longitudinal view showing a female member embedded in one segment, and FIG. 3 is embedded in the other segment. The perspective view which showed the male member is shown, respectively. 4 shows a sectional view taken along arrows IV-IV in FIG. 3, and FIG. 5 shows a cross-sectional view showing a state in which the steel pipe has expanded outward from the state shown in FIG. FIG. 6 is a longitudinal view showing a state in which two segments are temporarily fixed, FIG. 7a is a longitudinal view showing a state in which two segments are connected, and FIG. The longitudinal cross-sectional view which showed the positive / negative alternating load (tensile force) to perform and the resistance force with respect to it is each shown. In addition, although the connection structure shown shows the embodiment applied to the segment for shield tunnels, and shows the form applied only to the ring joint, the connection structure according to the present invention is an embodiment. Of course, it is not limited to. That is, the present invention can be applied to connection between appropriate members other than the segment, and may be a segment in which the connection structure of the present invention is applied to both the ring joint and the segment joint.

図1は、リング継手にて接続される2つのセグメント1a,1bを示したものである。このセグメント1a,1bは一般に使用されているコンクリート製のセグメントであるが、その他、鋼製セグメントやコンクリートと鋼製の複合セグメントであってもよい。ここで、セグメント1aがセグメント1bと接続する接続面1a1には複数の雌部材2,2,…がその一端の開口を接続面に臨ませた姿勢で埋設されている。一方、セグメント1bがセグメント1aと接続する接続面1b1には、双方のセグメント1a,1bの接続面が当接された際に雌部材2,2,…に挿入される位置に雄部材3,3,…が突出した姿勢で設けられている。雄部材3には、後述するように、その内部に充填材を充填するための充填孔が設けられており、この充填孔に充填材注入ダクトを案内するための箱抜き部4が設けられている。なお、雄部材3は、そのセグメント側の端部にL型フックを有する定着金物34を備えており、該雄部材3の所定長さの埋め込み代における雄部材3とセグメント1bを構成するコンクリートとの摩擦力に加えて、この定着金物とコンクリートとの摩擦力や支圧抵抗力などによって雄部材3に地震時などの際に正負交番荷重(引張り力)が作用した場合に、セグメント1bから雄部材3が引抜けないように構成されている。また、一方のセグメント1aに埋設されている雌部材2のセグメント側の端部にも拡径フランジ24が設けられており、雌部材2表面とコンクリートとの摩擦抵抗に加えて、この拡径フランジ24とコンクリートとの支圧抵抗力の双方で雌部材2がセグメント1aから引抜けないように構成されている。   FIG. 1 shows two segments 1a and 1b connected by a ring joint. The segments 1a and 1b are generally used concrete segments, but may be a steel segment or a composite segment made of concrete and steel. Here, a plurality of female members 2, 2,... Are embedded in the connection surface 1a1 where the segment 1a is connected to the segment 1b with the opening at one end thereof facing the connection surface. On the other hand, when the connecting surface 1b1 connecting the segment 1b to the segment 1a is brought into contact with the connecting surfaces of both the segments 1a, 1b, the male members 3, 3 are inserted into the female members 2, 2,. Are provided in a protruding position. As will be described later, the male member 3 is provided with a filling hole for filling the inside thereof, and a box opening 4 for guiding the filling material injection duct is provided in the filling hole. Yes. The male member 3 is provided with a fixing metal 34 having an L-shaped hook at the end on the segment side, and the male member 3 in the embedding allowance of the predetermined length of the male member 3 and the concrete constituting the segment 1b. When a positive / negative alternating load (tensile force) is applied to the male member 3 during an earthquake or the like due to the frictional force of the fixing metal and concrete or the resistance to bearing pressure in addition to the frictional force of The member 3 is configured not to be pulled out. A diameter-enlarging flange 24 is also provided at the segment-side end of the female member 2 embedded in one segment 1a. In addition to the frictional resistance between the female member 2 surface and the concrete, this diameter-enlarging flange is provided. The female member 2 is configured not to be pulled out from the segment 1a by both the bearing resistance force of 24 and concrete.

図2は、雌部材2の縦断図を示している。この雌部材2は、中空の拡幅金物23と、その対向する側面に開設された開口に連通する筒状金物21,22と、セグメントの内部側の筒状金物22の端部に設けられたフランジ24と、接続面1a1に臨む筒状金物21の開口部に設けられたフランジ25とから大略構成されている。例えば、拡幅金物23とその両端に連通する筒状金物21,22とを一体成形し、フランジ24,25を溶接することにより雌部材2を製造することができる。雌部材2がかかる外郭形状を呈しており、さらには、その両端部にて拡径したフランジ24,25が設けられていることで、セグメント1aを構成するコンクリートと雌部材2との接続強度は高められ(摩擦抵抗力と支圧抵抗力の総和)、特に、地震時の正負交番荷重(引張り力)に対して高い引張り耐力を期待することができる。   FIG. 2 shows a longitudinal view of the female member 2. The female member 2 includes a hollow wide metal piece 23, cylindrical metal pieces 21 and 22 communicating with openings formed on opposite side surfaces thereof, and a flange provided at an end of the cylindrical metal piece 22 on the inner side of the segment. 24 and a flange 25 provided at the opening of the cylindrical hardware 21 facing the connection surface 1a1. For example, the female member 2 can be manufactured by integrally molding the widened metal piece 23 and the cylindrical metal pieces 21 and 22 communicating with both ends thereof and welding the flanges 24 and 25. The female member 2 has such an outer shape, and further, flanges 24 and 25 having enlarged diameters are provided at both ends thereof, so that the connection strength between the concrete constituting the segment 1a and the female member 2 is as follows. Increased (sum of frictional resistance and bearing resistance), especially high tensile strength against positive and negative alternating loads (tensile force) during an earthquake can be expected.

図3は、雄部材3の縦断図を示している。雄部材3は、図4に示すように断面視が内側に凹型に織り込まれた織り込み部分31aを備えた鋼管31の両端部に被せ金物32,33が嵌め込まれて構成されている。被せ金物33は所定長さだけセグメント1bに埋め込まれており、被せ金物33の端部には、L型フックを有する定着金物34が固着されている。また、被せ金物33には充填材注入用の充填孔33aが穿設されており、この孔を箱抜き部4がコンクリートから保護するように設けられている。   FIG. 3 shows a vertical sectional view of the male member 3. As shown in FIG. 4, the male member 3 is configured by covering metal objects 32 and 33 fitted at both ends of a steel pipe 31 having a woven portion 31 a woven in a concave shape in cross section. The covering metal 33 is embedded in the segment 1 b by a predetermined length, and a fixing metal 34 having an L-shaped hook is fixed to the end of the covering metal 33. Further, the covering material 33 is provided with a filling hole 33a for injecting a filler, and the box opening portion 4 is provided so as to protect the hole from the concrete.

セグメント1a,1bの位置決め調整がおこなわれた後、充填孔33aを介して鋼管31内に無収縮モルタルなどの充填材5が充填される。図5は、その様子を示した断面図であり、図3の2点鎖線にて示された部分の断面図である。充填材5を鋼管内に加圧充填することにより、鋼管内の織り込み部分31aが鋼管31の外側に押出され、その結果として鋼管31の断面が膨らむこととなる。   After the positioning adjustment of the segments 1a and 1b is performed, the steel pipe 31 is filled with a filler 5 such as a non-shrink mortar through the filling hole 33a. FIG. 5 is a cross-sectional view showing the state, and is a cross-sectional view of a portion indicated by a two-dot chain line in FIG. By pressurizing and filling the filler 5 into the steel pipe, the woven portion 31a in the steel pipe is pushed out of the steel pipe 31, and as a result, the cross section of the steel pipe 31 is expanded.

図6は、雄部材3を雌部材2内へ挿入設置した状況を示している。雄部材3と雌部材2の双方の軸心方向長さはほぼ同程度に成形されている。雄部材3を雌部材2に挿入すると、雄部材3の被せ金物32が雌部材2の筒状金物22内に嵌合し、同様に、被せ金物33が筒状金物21内に嵌合する。かかる部材同士の嵌合により、雄部材3と雌部材2は仮固定でき、例えば、リング状に形成されたセグメントを他のリング状セグメントに接続する際には、双方のリング状に組付けられたセグメント同士を一気に仮固定させることができる。この仮固定段階では、雌部材2から雄部材3を完全に引抜いたり、微小に押し引きすることが可能であるため、シールドマシン内におけるセグメント組付け時の施工安全性を確保しながら、セグメント同士の組付け姿勢の微調整を容易におこなうことができる。   FIG. 6 shows a situation in which the male member 3 is inserted and installed in the female member 2. The axial lengths of both the male member 3 and the female member 2 are formed to be approximately the same. When the male member 3 is inserted into the female member 2, the covering member 32 of the male member 3 is fitted into the cylindrical member 22 of the female member 2, and similarly, the covering member 33 is fitted into the tubular member 21. By fitting the members together, the male member 3 and the female member 2 can be temporarily fixed. For example, when connecting a segment formed in a ring shape to another ring segment, the male member 3 and the female member 2 are assembled in both ring shapes. Segments can be temporarily fixed together. In this temporary fixing stage, the male member 3 can be completely pulled out from the female member 2 or can be pushed and pulled slightly. Therefore, while securing the construction safety when assembling the segments in the shield machine, Fine adjustment of the assembly posture can be easily performed.

セグメント1a,1b同士の組付け姿勢を微調整した後で、図7aに示すように、充填孔33aを介して充填材5が充填され、鋼管31のうち、特に拡幅金物23内に位置する鋼管31を外側に膨らませることで、鋼管31と拡幅金物23の内壁面とを相互に押圧した状態とする。充填材5として無収縮性の材料を使用することで、該充填材が硬化した後も体積収縮することがなく、したがって、鋼管31と拡幅金物23の内壁面との押圧状態を維持することができる。   After finely adjusting the assembling posture of the segments 1a and 1b, as shown in FIG. 7a, the filler 5 is filled through the filling hole 33a, and the steel pipe located in the wide metal fitting 23 among the steel pipes 31 is provided. By inflating 31 to the outside, the steel pipe 31 and the inner wall surface of the wide metal fitting 23 are pressed against each other. By using a non-shrinkable material as the filler 5, the volume does not shrink even after the filler is cured, so that the pressed state between the steel pipe 31 and the inner wall surface of the widened metal 23 can be maintained. it can.

図7bは、接続構造に地震時の正負交番荷重X1,X2が作用した際に雄部材3と雌部材2の間で作用し合う抵抗力を示したものである。なお、図中には、雌部材2とセグメント1aを構成するコンクリート間の摩擦抵抗や雄部材3とコンクリート1bを構成するコンクリート間の摩擦抵抗は図示していないが、双方に摩擦抵抗力が作用することは勿論のことである。   FIG. 7 b shows the resistance force acting between the male member 3 and the female member 2 when positive and negative alternating loads X1, X2 at the time of an earthquake act on the connection structure. In the figure, the frictional resistance between the concrete constituting the female member 2 and the segment 1a and the frictional resistance between the male member 3 and the concrete constituting the concrete 1b are not shown, but the frictional resistance acts on both. Of course.

セグメント1aにX1方向の地震時水平力が作用した場合、あるいは、セグメント1bにX2方向の地震時水平力が作用した場合には、雌部材2には、コンクリートとの間の摩擦抵抗力のほかに、図示するように、フランジ24に支圧抵抗力P1が働き、さらに、拡幅金物23にも筒状金物21よりも拡径した部分に支圧抵抗力P2が働く。この際に、雄部材3の膨らんだ鋼管31には抵抗力P3が作用するため、雄部材3は雌部材2から抜け出すことなく双方の接続状態が維持できる。なお、雄部材3は、定着金物34に作用する支圧抵抗力P4や定着金物34とコンクリートとの間の摩擦抵抗力などにより、雄部材3自体がコンクリートから抜け出さないように構成されている。このL型フックを有する定着金物34はスタッドボルトなどであってもよく、いずれの実施形態においても、フック形状やスタッド部分を備えた構成とすることで支圧抵抗の付加や、コーン破壊に対する抵抗力を高めることが可能となる。   When a horizontal force during an earthquake in the X1 direction acts on the segment 1a, or when a horizontal force during an earthquake in the X2 direction acts on the segment 1b, the female member 2 has a friction resistance force between it and the concrete. In addition, as shown in the drawing, the bearing resistance force P1 acts on the flange 24, and further, the bearing resistance force P2 acts on the widened metal piece 23 in a portion whose diameter is larger than that of the cylindrical metal piece 21. At this time, since the resistance force P3 acts on the steel pipe 31 in which the male member 3 swells, the male member 3 can maintain both connection states without coming out of the female member 2. Note that the male member 3 is configured so that the male member 3 itself does not come out of the concrete due to the bearing pressure resistance P4 acting on the fixing hardware 34 or the frictional resistance force between the fixing hardware 34 and the concrete. The fixing hardware 34 having the L-shaped hook may be a stud bolt or the like. In any of the embodiments, the structure including the hook shape and the stud portion can be used to add a bearing resistance and to resist cone breakage. It becomes possible to increase power.

上記するように、本発明の接続構造(仮固定のための手段と、所望の接続強度にて接続するための手段の双方を備えた構造)を構成する雄部材と雌部材をそれぞれ備えたセグメントを使用することにより、多数のセグメントを一気にリング方向あるいはトンネル軸心方向に組付けていきながら、組付け時の施工安全性を確保した状態で、適宜、セグメントの組付け姿勢を調整することができる。さらに、シールドマシンの掘進に並行するように、組付け姿勢の微調整がおこなわれたセグメント同士の接続部に充填材を加圧充填していくことにより、効率的なシールドトンネルの構築を実現することができ、さらには、高強度の接続構造を備えたシールドトンネルを構築することができる。特に、既述するように地震時水平力に対して接続部が雄部材と雌部材間で摩擦抵抗力や支圧抵抗力を相互に効果的に発揮することで、耐震性能に優れた接続構造を備えたシールドトンネルとすることができる。   As described above, the segments each having a male member and a female member constituting the connection structure of the present invention (a structure having both means for temporary fixing and means for connecting at a desired connection strength). As a result, the assembly posture of the segments can be adjusted as appropriate while securing the construction safety while assembling many segments at once in the ring direction or tunnel axis direction. it can. Furthermore, in parallel with the digging of the shield machine, the construction of an efficient shield tunnel is realized by pressurizing and filling the joints between the segments where the assembly posture has been finely adjusted. Furthermore, a shield tunnel having a high-strength connection structure can be constructed. In particular, as described above, the connecting part has excellent seismic performance because the connection part effectively exhibits frictional resistance and bearing resistance between the male and female members against the horizontal force during an earthquake. It can be set as the shield tunnel provided with.

以上、本発明の実施の形態を図面を用いて詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における設計変更等があっても、それらは本発明に含まれるものである。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

セグメント同士を接続している状況を示した斜視図。The perspective view which showed the condition which has connected segments. 一方のセグメントに埋設された雌部材を示した縦断図。The longitudinal section which showed the female member embed | buried under one segment. 他方のセグメントに埋設された雄部材を示した斜視図。The perspective view which showed the male member embed | buried under the other segment. 図3のIV−IV矢視図。IV-IV arrow line view of FIG. 図4の状態から鋼管が外側に膨らんだ状態を示した断面図。Sectional drawing which showed the state which the steel pipe swelled outside from the state of FIG. 2つのセグメント同士を仮固定した状態を示した縦断図。The longitudinal section showing the state where two segments were temporarily fixed. (a)は、2つのセグメント同士が接続された状態を示した縦断図。(b)は、地震時に接続構造に作用する正負交番荷重(引張り力)とそれに対する抵抗力を示した縦断図。(A) The longitudinal section which showed the state where two segments were connected. (B) is a longitudinal sectional view showing positive and negative alternating loads (tensile force) acting on the connection structure at the time of an earthquake and resistance force thereto.

符号の説明Explanation of symbols

1a,1b…セグメント、2…雌部材、21,22…筒状金物、23…拡幅金物、3…雄部材、31…膨張鋼管,31a…織り込み部分、32,33…被せ金物、33a…充填孔、4…箱抜き部、5…無収縮モルタル(充填材)   DESCRIPTION OF SYMBOLS 1a, 1b ... Segment, 2 ... Female member, 21, 22 ... Cylindrical metal fitting, 23 ... Widening metal fitting, 3 ... Male member, 31 ... Expanded steel pipe, 31a ... Weaving part, 32, 33 ... Cover metal, 33a ... Filling hole 4 ... Box opening part, 5 ... Non-shrink mortar (filler)

Claims (6)

第一の部材と第二の部材を繋ぐ接続構造であって、
前記第一の部材には、その接続面に開口が臨んだ姿勢で該開口に連通する雌部材が埋め込まれており、
前記第二の部材には、その接続面から突出して前記雌部材に挿入される雄部材が設けられており、
雄部材と雌部材にはそれぞれ、該雄部材が該雌部材に挿入された際に第一の部材と第二の部材を仮固定するための第一の固定手段と、所定の接続強度に接続するための第二の固定手段とが備えられており、
前記第一の固定手段は、雌部材を構成する第一の中空体と、雄部材を構成して該第一の中空体に嵌合可能な第一の棒部材とからなり、
前記第二の固定手段は、雌部材を構成して第一の中空体よりも内空寸法の大きな第二の中空体と、雄部材を構成し、流体が充填されることによって該第二の中空体内で膨らむことで第二の中空体の内壁を押圧可能な第二の棒部材とからなることを特徴とする接続構造。
A connection structure connecting the first member and the second member,
In the first member, a female member communicating with the opening in a posture in which the opening faces the connection surface is embedded,
The second member is provided with a male member that protrudes from the connection surface and is inserted into the female member,
Each of the male member and the female member is connected to a first fixing means for temporarily fixing the first member and the second member when the male member is inserted into the female member, and connected to a predetermined connection strength. second and and are provided fixing means for,
The first fixing means comprises a first hollow body constituting a female member, and a first rod member constituting a male member and fitable to the first hollow body,
The second fixing means constitutes a female member, constitutes a second hollow body having a larger inner dimension than the first hollow body, and a male member, and is filled with a fluid when the second hollow body is filled with the second hollow body. A connection structure comprising: a second rod member capable of pressing the inner wall of the second hollow body by swelling in the hollow body.
前記雌部材は、2つの筒状金物と、該筒状金物の間に介装されるとともに該筒状金物の直径よりも大きな直径を有する中空の拡幅金物とが一体成形されており、
前記雄部材は、前記筒状金物の内径と同一または略同一の外径を有する筒体でその一端が閉塞された2つの被せ金物と、該2つの被せ金物がその両端に嵌合された膨張性の鋼管とからなり、
該鋼管は、雄部材が雌部材に挿入される際はその断面が凹型に織り込まれており、
該鋼管内に流体を充填することにより、少なくとも中空の拡幅金物内に位置する鋼管の凹型に織り込まれた部分が外側に押圧されて膨らむことにより、中空の拡幅金物の内壁面を膨らんだ鋼管が押圧して雌部材と雄部材が所定の接続強度に接続されることを特徴とする請求項に記載の接続構造。
The female member is integrally formed with two cylindrical hardware and a hollow widened metal metal interposed between the cylindrical hardware and having a diameter larger than the diameter of the cylindrical hardware,
The male member includes a cylinder having an outer diameter that is the same as or substantially the same as the inner diameter of the cylindrical hardware, and two coverings whose one ends are closed, and an expansion in which the two coverings are fitted to both ends. Made of sex steel pipe,
The steel pipe is woven in a concave shape when the male member is inserted into the female member,
By filling the steel pipe with a fluid, at least a portion woven into the concave shape of the steel pipe located in the hollow wide metal fitting is pressed outward and bulges, whereby a steel pipe that swells the inner wall surface of the hollow wide metal fitting is obtained. The connection structure according to claim 1 , wherein the female member and the male member are pressed to be connected to a predetermined connection strength.
前記流体が、無収縮モルタルからなることを特徴とする請求項に記載の接続構造。 The connection structure according to claim 2 , wherein the fluid is a non-shrink mortar . 前記第一の部材と前記第二の部材が、シールドトンネル用のセグメントであることを特徴とする請求項1〜3のいずれかに記載の接続構造。 The connection structure according to claim 1 , wherein the first member and the second member are shield tunnel segments. 請求項に記載の接続構造を備えたことを特徴とするシールドトンネル。 A shield tunnel comprising the connection structure according to claim 4 . シールドトンネルを構成するセグメント同士のリング方向および/またはトンネル軸心方向の接続構造において、一方のセグメントの接続面には、2つの筒状金物と、該筒状金物の間に介装されるとともに該筒状金物の直径よりも大きな直径を有する中空の拡幅金物とが一体成形されてなる雌部材が埋め込まれており、他方のセグメントの接続面には、前記筒状金物の内径と同一または略同一の外径を有する筒体で一端が閉塞された2つの被せ金物と、該2つの被せ金物がその両端に嵌合されるとともにその断面が凹型に織り込まれている鋼管とからなる雄部材が接続面から突出した姿勢で設けられており、雄部材と雌部材とを接続することによって構築するシールドトンネルの構築方法であって、
一方のセグメントの接続面の雌部材を構成する筒状金物に他方のセグメントの接続面の雄部材を構成する被せ金物を嵌合させることにより、トンネルのリング方向および/またはトンネル軸心方向に所定数のセグメントを仮接続していき、
必要に応じて筒状金物と被せ金物との嵌合姿勢を相対的にずらすことによって所望のセグメント組付け姿勢を形成し、
無収縮性の流体を鋼管内に加圧充填することにより、中空の拡幅金物内に位置する鋼管部分のうち、内側に織り込まれていた凹部が外側に押圧されることにより、該鋼管が外側に膨らんで拡幅金物の内壁面を押圧し、双方のセグメントが所定の接続強度で接続されることを特徴とするシールドトンネルの構築方法。
In the connection structure between the segments constituting the shield tunnel in the ring direction and / or the tunnel axial direction, the connection surface of one segment is interposed between two cylindrical hardwares and the cylindrical hardware A female member formed by integrally forming a hollow wide metal fitting having a diameter larger than the diameter of the cylindrical metal piece is embedded, and the connection surface of the other segment is the same as or substantially the same as the inner diameter of the cylindrical metal piece. A male member composed of two covering objects whose one ends are closed with a cylindrical body having the same outer diameter, and a steel pipe in which the two covering objects are fitted to both ends and whose cross section is woven into a concave shape. It is provided in a posture protruding from the connection surface, and is a construction method of a shield tunnel constructed by connecting a male member and a female member,
By fitting the covering metal constituting the male member of the connecting surface of the other segment to the cylindrical hardware constituting the female member of the connecting surface of one segment, it is predetermined in the tunnel ring direction and / or the tunnel axial direction. A number of segments,
If necessary, form the desired segment assembly posture by relatively shifting the fitting posture of the cylindrical hardware and the covering hardware,
By pressurizing and filling a non-shrinkable fluid into the steel pipe, the steel pipe portion positioned inside the hollow widened metal piece is pressed outward by the concave portion woven inside, so that the steel pipe is brought outward. A method for constructing a shield tunnel, characterized in that it swells and presses the inner wall surface of the widened metal piece so that both segments are connected with a predetermined connection strength.
JP2005172754A 2005-06-13 2005-06-13 Connection structure, shield tunnel and shield tunnel construction method Expired - Fee Related JP4485415B2 (en)

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JPH0324873U (en) * 1989-07-19 1991-03-14
JPH10227074A (en) * 1997-02-14 1998-08-25 Takeshige Shimonohara Connecting material and connecting method for member using it
JPH10325295A (en) * 1997-05-26 1998-12-08 Kajima Corp Joint structure of segment
JPH11280391A (en) * 1998-03-31 1999-10-12 Kubota Corp Coupling device of segment for tunnel

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Publication number Priority date Publication date Assignee Title
JPH0324873U (en) * 1989-07-19 1991-03-14
JPH10227074A (en) * 1997-02-14 1998-08-25 Takeshige Shimonohara Connecting material and connecting method for member using it
JPH10325295A (en) * 1997-05-26 1998-12-08 Kajima Corp Joint structure of segment
JPH11280391A (en) * 1998-03-31 1999-10-12 Kubota Corp Coupling device of segment for tunnel

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