JP3556630B2

JP3556630B2 - Joint structures, joints for segments, segments and shield tunnels

Info

Publication number: JP3556630B2
Application number: JP2001306229A
Authority: JP
Inventors: 淳山根
Original assignee: Nishimatsu Construction Co Ltd
Current assignee: Nishimatsu Construction Co Ltd
Priority date: 2001-10-02
Filing date: 2001-10-02
Publication date: 2004-08-18
Anticipated expiration: 2021-10-02
Also published as: JP2003106093A

Description

【０００１】
【発明の属する技術分野】
本発明は、継手構造体および該継手構造体を使用して形成される掘削坑の内側にセグメントを周方向およびトンネル軸方向に連結して構築されるシールドトンネルのために用いられるセグメント用継手、該継手を備えるセグメントおよびシールドトンネルに関する。
【０００２】
【従来の技術】
これまで、互いに隣接する部材を連結するために種々の継手構造が、必要に応じて材質、締結力、作業性、効率性といった点から提案されている。例えば、シールド工法は、トンネルや坑道を構築するために用いられ、シールド掘進機を用いて地下に穴を堀進し、この穴の内側をセグメントリングで覆工する工法であり、安全かつ確実に作業を行うことができるという特徴がある。
【０００３】
このシールド工法に用いられるセグメントリングは、通常は複数のセグメントに分割された状態で堀削坑の内部に運ばれ、内部の施工現場で堀削坑の内径に沿って組み立てられる。このため、セグメントは容易に連結できることが望まれている。また、耐久性や安全性などの面から、トンネル内面に継手が露出しないことが望まれている。
【０００４】
セグメント間の連結は、例えば特開平９−１３２９９７号公報によると、互いに連結すべきセグメントに継手プレートが設けられ、ボルトボックスを利用してワッシャを介してボルトを通し、またワッシャを介してナットを締め付けることによって行われることが開示されている。
【０００５】
また、特開平１０−２２０１８５号公報には、互いに連結すべきセグメントの一方にピンが突設され、他方にはピン穴が設けられ、一方のピンが他方のピン穴に挿入される構造が開示されている。また、突設されたピンには、側方に張り出す係止凸部が設けられ、ピン穴には回動自在とされた筒体と、筒体内部に係止部材と、筒体を回動方向に付勢するゼンマイとが設けられ、ピンの係止凸部とピン穴の係止部材とによって連結される継手構造が開示されている。
【０００６】
さらに、特開平９−１３２９９７号公報には、ボルトボックスを利用してボルトを継手プレートに高剛性ワッシャを介して通し、通したボルトに、さらに高剛性ワッシャを介してナットを填めて締結する方法が開示されている。従来のボルト、ナットを用いた連結方法と比較すると、ボルトをナットに填めることが容易であり、高剛性ワッシャを用いて締結するため、ナットの緩みを抑えることができるなどの利点がある。しかしながら、特開平９−１３２９９７号公報に開示された方法は、セグメントに取り付ける継手の位置や継手プレートおよび高剛性ワッシャの加工精度、セグメントの設置位置などを厳密に管理する必要がある。
【０００７】
また、特開平１０−２２０１８５号公報には、互いに連結すべきセグメントの突設されたピンを、ピン穴の筒体を回転させて挿入し、突設されたピンの側方に張り出す係止凸部と筒体内部の係止部材とにより、容易にセグメントを連結できる方法が開示されている。しかしながら、特開平１０−２２０１８５号公報に開示される方法は、ピンと、ピン穴との位置がずれるとセグメントを連結できない場合があるため、これらの設置位置とセグメントの設置位置の双方を厳密に管理する必要がある。さらに、セグメントを固定させるために、ピンに設けられる係止凸部の位置と、ピン穴に設けられる係止部材の位置および強度とを厳密に管理する必要もある。
【０００８】
また、上述したピンおよびボルト、ナットを用いた従来例では、セグメントの加工を複雑にするため、セグメントコストが高くなるという問題があった。さらに、高剛性ワッシャを用いたとしても、ナットには緩みが生じるため、ナットの増し締めなどの事後工程を要し、コストおよび効率といった点において充分とはいえなかった。また、上述した従来例では、ボルトボックスを設ける必要上、セグメントにコンクリート製のセグメントを用いる場合、継手部分のひび割れや漏水を多く生じるといった問題があった。さらに、従来例では、継手の配設がセグメントの内周側に集中しており、この構造はセグメント内側の曲げ引張応力に対して耐久性がある一方で、セグメント外側の曲げ引張応力に弱い欠点がある。このため、土圧などのセグメント外周部への圧力により構築したシールドトンネルに変形を生じるといった問題もあった。
【０００９】
特開２００１−１７３３７４号公報には、セグメントに設けられたオス継手とメス継手とを嵌合させて一時的な荷重を緩和させ、接合面同士が隣接した状態でＰＣ鋼材を挿通させてプレストレスをかけることにより連結することが開示されている。この接合構造では、ボルトおよびナットを用いることがないために施工性が良く、事後工程を必要としないといった利点がある。しかしながら、特開２００１−１７３３７４号公報に開示の接合構造は、ＰＣ鋼材を挿通させる孔をセグメントに設ける必要があり、セグメントを連結してトンネルを形成するのに多くのＰＣ鋼材を必要とする問題があった。
【００１０】
【発明が解決しようとする課題】
従って、容易に、かつ迅速に互いに隣接する部材を連結することができる継手構造体を提供し、さらにシールド工法を施工する際に、トンネル周方向にセグメントを連結することにより、労力を低減させ、かつ低コストとなるセグメント用継手、土圧などによる外部圧力に対しても耐久性のあるシールドトンネルを構築することを可能とする該セグメント用継手を備えたセグメントおよびシールドトンネルを提供することを目的とする。
【００１１】
【課題を解決するための手段】
本発明の上記目的は、本発明の継手構造体、該継手構造体を用いたセグメント用継手、セグメントおよびシールドトンネルを提供することにより達成される。
【００１２】
本発明の請求項１の発明によれば、継手構造体であって、該継手構造体は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と、前記先端部に連続し、穴が設けられた根本部とを含む突出部材と、前記突出部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部とを含む先端部収容部材を備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止される継手構造体が提供される。
【００１３】
本発明の請求項２の発明によれば、前記係止部材は、先端から末端に向けて径が拡大した拡径部を備え、前記穴は、前記拡径部に適合する穴とされていて、前記突出部材は、前記拡径部を前記穴に挿設するにつれて張力が増加することを特徴とする継手構造体が提供される。
【００１４】
本発明の請求項３の発明によれば、前記先端部および前記嵌合部は、テーパが形成されていることを特徴とする継手構造体が提供される。
【００１５】
本発明の請求項４の発明によれば、継手構造体であって、該継手構造体は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と前記先端部に連続する根本部とを含む突出部材を備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部と、穴が設けられた末端部とを含む先端部収容部材と、前記先端部収容部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止される継手構造体が提供される。
【００１６】
本発明の請求項５の発明によれば、シールドトンネルを構築するセグメントをトンネル周方向に連結するためのセグメント用継手であって、該継手は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と、前記先端部に連続し、穴が設けられた根本部とを含む突出部材と、前記突出部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部とを含む先端部収容部材を備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるセグメント用継手が提供される。
【００１７】
本発明の請求項６の発明によれば、前記係止部材は、先端から末端に向けて径が拡大した拡径部を備え、前記穴は、前記拡径部に適合する穴とされていて、前記突出部材は、前記拡径部を前記穴に挿設するにつれて張力が増加することを特徴とするセグメント用継手が提供される。
【００１８】
本発明の請求項７の発明によれば、前記先端部および前記嵌合部は、テーパが形成されていることを特徴とするセグメント用継手が提供される。
【００１９】
本発明の請求項８の発明によれば、前記先端部収容部材および前記収容部材は、前記セグメントに固定するためのアンカーを備えるセグメント用継手が提供される。
【００２０】
本発明の請求項９の発明によれば、シールドトンネルを構築するセグメントをトンネル周方向に連結するためのセグメント用継手であって、該継手は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と前記先端部に連続する根本部とを含む突出部材を備え、前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部と、穴が設けられた末端部とを含む先端部収容部材と、前記先端部収容部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるセグメント用継手が提供される。
【００２１】
本発明の請求項１０の発明によれば、互いに隣接するセグメントをトンネル周方向に連結するためのセグメント用継手を含むセグメントであって、該継手は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と、前記先端部に連続し、穴が設けられた根本部とを含む突出部材と、前記突出部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部とを含む先端部収容部材を備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるセグメントが提供される。
【００２２】
本発明の請求項１１の発明によれば、前記係止部材は、先端から末端に向けて径が拡大した拡径部を備え、前記穴は、前記拡径部に適合する穴とされていて、前記突出部材は、前記拡径部を前記穴に挿設するにつれて張力が増加することを特徴とするセグメントが提供される。
【００２３】
本発明の請求項１２の発明によれば、前記先端部および前記嵌合部は、テーパが形成されていることを特徴とするセグメントが提供される。
【００２４】
本発明の請求項１３の発明によれば、前記先端部収容部材および前記収容部材は、前記セグメントに固定するためのアンカーを備えるセグメントが提供される。
【００２５】
本発明の請求項１４の発明によれば、前記セグメントは、前記通孔に向けて貫通する貫通孔が設けられ、前記係止部材が前記貫通孔に挿通されていて、前記係止部材により前記突出部材が係止された後に前記貫通孔にグラウトを充填することを特徴とするセグメントが提供される。
【００２６】
本発明の請求項１５の発明によれば、互いに隣接するセグメントをトンネル周方向に連結するためのセグメント用継手を含むセグメントであって、該継手は、オス金具とメス金具とから構成され、
前記オス金具は、拡張した先端部と前記先端部に連続する根本部とを含む突出部材を備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部と、穴が設けられた末端部とを含む先端部収容部材と、前記先端部収容部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるセグメントが提供される。
【００２７】
本発明の請求項１６の発明によれば、セグメントを周方向に連結して構築されるシールドトンネルであって、トンネル周方向に互いに隣接するセグメントがオス金具とメス金具とにより連結され、
前記オス金具は、拡張した先端部と、前記先端部に連続し、穴が設けられた根本部とを含む突出部材と、前記突出部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部とを含む先端部収容部材を備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるシールドトンネルが提供される。
【００２８】
本発明の請求項１７の発明によれば、前記係止部材は、先端から末端に向けて径が拡大した拡径部を備え、前記穴は、前記拡径部に適合する穴とされていて、前記突出部材は、前記拡径部を前記穴に挿設するにつれて張力が増加することを特徴とするシールドトンネルが提供される。
【００２９】
本発明の請求項１８の発明によれば、前記先端部および前記嵌合部は、テーパが形成されていることを特徴とするシールドトンネルが提供される。
【００３０】
本発明の請求項１９の発明によれば、前記先端部収容部材および前記収容部材は、前記セグメントに固定するためのアンカーを備えるシールドトンネルが提供される。
【００３１】
本発明の請求項２０の発明によれば、前記セグメントは、前記通孔に向けて貫通する貫通孔が設けられ、前記係止部材が前記貫通孔に挿通されていて、前記係止部材により前記突出部材が係止された後に前記貫通孔にグラウトを充填することを特徴とするシールドトンネルが提供される。
【００３２】
本発明の請求項２１の発明によれば、セグメントを周方向に連結して構築されるシールドトンネルであって、トンネル周方向に互いに隣接するセグメントがオス金具とメス金具とにより連結され、
前記オス金具は、拡張した先端部と前記先端部に連続する根本部とを含む突出部材を備え、
前記メス金具は、前記根本部が挿通可能な正面部開口と、前記正面部開口に連続し、前記先端部が挿通可能な側部開口と、前記正面部開口および前記側部開口に連続し、前記先端部を嵌挿させるように収容可能な嵌合部と、穴が設けられた末端部とを含む先端部収容部材と、前記先端部収容部材を突出および収容可能とし、かつ通孔が設けられた収容部材と、前記通孔と前記穴とに跨るように挿設できる係止部材とを備えており、
前記先端部収容部材は、前記先端部を収容し、かつ前記収容部材に収容され、前記係止部材により前記収容部材に収容した前記突出部材が突出しないように係止されるシールドトンネルが提供される。
【００３３】
【発明の実施の形態】
以下、本発明の継手構造体をシールド工法に用いられるセグメントを連結するためのセグメント用継手として、実施の形態をもって詳細に説明する。図１は、本発明のセグメント用継手を備えるセグメント１が周方向に連結されて構築されるセグメントリング２を示した斜視図である。図１に示すセグメントリング２は、セグメント１が堀削坑の内側において本発明のセグメント用継手を用いて周方向に連結されることにより構築することができる。本発明のシールドトンネルは、トンネル軸方向へシールドジャッキなどの手段を用いて掘削し、トンネル軸方向に連続した別のセグメントリングが延ばされることにより構築される。
【００３４】
本発明のセグメント用継手は、オス金具とメス金具とが対になって構成されており、これらのオス金具とメス金具とは、セグメント１のトンネル周方向に互いに対向したセグメント端部３ａ、３ｂに配設されて、セグメント１をトンネル周方向へと連結することができる。また、セグメント１を軸方向へ連結させるためには、これまで知られている例えば、ボルトおよびナットを用いた継手などにより行うことができる。また、トンネル軸方向においても本発明のセグメント用継手を用いることが可能である。本発明のセグメント用継手に用いられるオス金具およびメス金具には、鋳鉄やセラミックスといった材料を用いることができる。さらに、連結を維持するのに充分な強度を持つものであれば、鋳鉄やセラミックス以外の、いかなる材料でも用いることができる。また、本発明のセグメント継手は、セグメント端部３ａ、３ｂに連結に必要な数設けることができる。
【００３５】
図２は、本発明のセグメント用継手の第１の実施の形態を示した断面図である。図２に示すセグメント用継手は、オス金具４とメス金具５とから構成されていて、一方のセグメント１ａのセグメント端部３ａにオス金具４が、他方のセグメント１ｂのセグメント端部３ｂにメス金具５が設けられている。また、図２においては、セグメント１ａとセグメント１ｂとをセグメント用継手を用いてトンネル周方向に連結されるようになっている。図２に示すオス金具４は、突出部材６と、突出部材６を収容する収容部材７と、収容した突出部材６を収容部材７に係止する係止部材８とを備えている。図２に示す突出部材６は、拡張した先端部６ａと、先端部６ａに連続する根本部６ｂと、所定位置に穴９が設けられ、根本部６ｂに比較して拡張した末端部６ｃとを備えている。また、収容部材７は、突出部材６を突出および収容可能とし、所定位置に通孔１０が設けられている。図２に示す係止部材８は、突出部材６を収容部材７に収容した場合に末端部６ｃに設けられた穴９と収容部材７に設けられた通孔１０とに跨るように挿設でき、突出部材６が収容部材７から突出しないように係止することができるようになっている。
【００３６】
図２に示す突出部材６は、根本部６ｂと、根本部６ｂに比較して拡張した先端部６ａと末端部６ｃとを備えている。本発明において根本部６ｂは、適切な厚さを有する平板などとすることができる。また、根本部６ｂは、セグメント１ａと隣接するセグメント１ｂとを連結した場合に、土圧などの所定の荷重に耐えうるような厚さとすることができる。本発明においては、セグメント端部３ａにオス金具４を配設する数や所定の強度を有するように適宜根本部６ｂの幅を選択することができる。また、先端部６ａは、セグメント１をトンネル坑内に配設した場合にセグメント１の内周方向および外周方向に拡張された形状とされている。先端部６ａの幅は、上述した根本部６ｂと同じ幅とすることができる。図２に示す実施の形態では、先端部６ａは、トンネル軸方向への幅が根本部６ｂと同じとされ、セグメント１ｂの内周方向および外周方向に突出した三角柱状のものが平板の上下に設けられたような形状とされている。本発明のセグメント継手に用いられる突出部材６の先端部６ａの形状は、根本部６ｂと比較して拡張されていれば、いかなる別の形状のものでも用いることができる。ただし、先端部６ａの形状は、後述するメス金具５の先端部収容部材に収容した場合に正面部開口から抜けない程度に拡張された形状とする必要がある。
【００３７】
図２に示す末端部６ｃは、根本部６ｂに連続する先端部６ａとは反対側の端部に設けられている。図２に示す末端部６ｃは、所定位置に突出部材６が突出する方向に対して垂直となる方向に向いた穴９が設けられている。また、末端部６ｃは、一部が根本部６ｂと比較してセグメント１ｂの厚さ方向、すなわち内周方向および外周方向に拡張されていて、末端部６ｃが収容部材７から外れないようになっている。さらに、図２に示す末端部６ｃの一部に設けられた穴９は、ボルト穴とされていて、係止部材８の先端に設けられる拡径ボルトと嵌合させて締結されるようになっている。本発明において末端部６ｃは、トンネル軸方向に拡張されていても良いし、内周方向、外周方向およびトンネル軸方向のすべてに拡張された形状とされていても良い。また、本発明においては、根本部６ｂと末端部６ｃとに分かれていなくても良く、穴９が設けられた根本部６ｂであっても良い。さらに、本発明においては、突出部材６が収容部材７から外れるようになっていても良く、この場合には、メス金具５と連結した突出部材６を収容部材７に収容し、係止部材８によって係止させてオス金具４とメス金具５とを連結させることができる。
【００３８】
図２に示す収容部材７は、先端部６ａを嵌挿したメス金具５を収容する第１の収容部７ａと、末端部６ｃを収容する第２の収容部７ｂと、根本部６ｂおよび末端部６ｃの一部を収容する連通部７ｃとを含んでいる。図２に示す第１の収容部７ａは、先端部６ａを嵌挿した後述するメス金具５の先端部収容部材を収容できるようになっている。第２の収容部７ｂは、末端部６ｃが移動可能とされていて、連通部７ｃは、根本部６ｂおよび拡張されていない末端部６ｃの一部が挿通可能とされている。また、第２の収容部７ｂには、係止部材８を挿設するための通孔１０が設けられている。図２に示す実施の形態では、通孔１０は、係止部材８を挿通させるための通孔とされている。本発明においては、末端部６ｃと収容部材７とを固定するために穴９と通孔１０との両方をボルト穴とすることもできる。また、穴９が貫通された穴とされ、通孔１０と穴９を通り抜けた側の第２の収容部７ｂにもボルト穴とされた通孔１０が設けられ、両方の通孔１０により固定されるようにされていても良い。
【００３９】
図２に示す係止部材８は、通孔１０に比較して拡張した拡径部１１と、通孔１０およびセグメント１ａに設けられた貫通孔１２に挿設される軸部１３と、セグメント１ａの内周側に配設される回転部１４とから構成されている。図２に示す実施の形態では、係止部材８は、拡径部１１のみがねじ切りされたボルトとされている。また、係止部材８は、オス金具４とメス金具５とを連結した後、回転部１４を回転させることにより拡径部１１を末端部６ｃに設けられた穴９に挿入して締結できるようになっている。本発明において係止部材８は、穴９と通孔１０とに跨るように挿設でき、収容部材７に収容した突出部材６を突出させないようにできるものであれば上述したもの以外にいかなるものでも用いることができる。本発明においては、回転部１４は、セグメント１ａに凹部を設け、その内部に配設されるようにしても良い。また、本発明においては、軸部１３の長さを変更することによりセグメント１ａの内周側から外周側までいかなる位置にオス金具４を設けることができる。本発明においては、図２に示すようにセグメント１ａの外周側にオス金具４を配設することができるため、セグメント外側の曲げ引張応力に対して耐久性を与えることが可能となる。また、本発明においては、係止部材の一部がセグメントの内周側に現れるが、その面積が狭小であるため、セグメント内面または構築したシールドトンネルの内面を略平滑に仕上げることが可能である。さらに、本発明においては、回転部１４がセグメント１ａの内周側に現れるため、特殊レンチなどを使用することなく、また再増し締めなどを容易に行うことができる。
【００４０】
図２に示すメス金具５は、先端部収容部材１５を備え、セグメント端部３ｂのオス金具４と対向する位置に配設されている。図２に示す先端部収容部材１５は、先端部６ａを嵌挿させることができるように一部が突出され、その他がセグメント１ｂに配設されている。先端部収容部材１５の突出した部分は、オス金具４に設けられた第１の収容部７ａに収容できるようになっている。また、メス金具５の正面部１６には、オス金具４の先端部６ａを嵌挿するとともに根本部６ｂを挿通させるための正面部開口１７が設けられている。さらに、オス金具４とメス金具５との連結は、セグメント１ａまたはセグメント１ｂをトンネル軸方向に滑動、すなわちスライドさせるようにして嵌挿するため、先端部収容部材１５の側部に側部開口１８が設けられている。オス金具４の先端部６ａは、側部開口１８を通してスライドするように嵌挿されることにより、先端部収容部材１５に収容される。また、図２に示す先端部収容部材１５は、オス金具４の先端部６ａを嵌挿させて収容するための嵌合部１９を備えている。
【００４１】
図２に示す実施の形態では、上述したように先端部収容部材１５の嵌合部１９にオス金具４の先端部６ａが嵌挿され、先端部６ａが嵌挿されたままで先端部収容部材１５が第１の収容部７ａに収容される。第１の収容部７ａに収容された先端部６ａは、先端部収容部材１５の側部開口１８に向けてスライドさせることができなくなる。また、第１の収容部７ａに突出した先端部６ａを収容した場合、係止部材８の拡径部１１を穴９に挿設することができるようになる。図２においては、係止部材８の拡径部１１を穴９に挿入し、回転部１４を回転させて締結することにより先端部収容部材１５が外れなくなる。本発明のセグメント用継手は、上述したようにしてセグメント１ａとセグメント１ｂとを連結することができる。
【００４２】
図２に示す収容部材７および先端部収容部材１５は、セグメント１ａおよびセグメント１ｂに固定するためにアンカー２０ａ、２０ｂが設けられている。また、図２に示すアンカー２０ａ、２０ｂは、セグメント１ａ、１ｂの周方向に延びるように配設されている。本発明においてアンカー２０ａ、２０ｂは、オス金具４およびメス金具５それぞれを固定する以外に、オス金具４とメス金具５とを連結した際に容易に外れないような形状、長さ、本数とすることができる。また、アンカー２０ａ、２０ｂは、セグメント１ａ、１ｂの周方向でなくてもトンネル軸方向に向けて配設されていても良い。図２においてアンカー２０ａ、２０ｂは、棒状とされているが、容易に抜けないように棒状のものに突起などが複数設けられた形状のものなどを用いることができる。また、アンカー２０ａ、２０ｂは、収容部材７および先端部収容部材１５のそれぞれに溶接などして配設することができる。
【００４３】
本発明においては、セグメント１ａ、１ｂの片側の端部にオス金具４を、他側の端部にメス金具５を設けることができる。また、オス金具４のみを設けたセグメント１ａ、１ｂとメス金具５のみを設けたセグメント１ａ、１ｂとを交互に連結しても良い。本発明においては、セグメント１ａ、１ｂの片側の端部に設けられるオス金具４またはメス金具５は、セグメント１ａ、１ｂの大きさ、重量などを考慮して適切な数、位置に設けることができる。本発明においては、先端部収容部材１５を突出および収容可能とすることも可能であるし、先端部６ａおよび嵌合部１９、第１の収容部７ａおよび正面部１６にテーパが形成されているものを用いて嵌挿させて連結することもできる。
【００４４】
図３は、本発明のセグメント用継手のオス金具４の突出部材６とメス金具５の先端部収容部材１５の一部とを例示した図である。図３（ａ）は、突出部材６および先端部収容部材１５を例示した第１の図である。図３（ａ）に示す突出部材６の先端部６ａは、図２に示す先端部６ａと同様、セグメントの内周方向および外周方向に三角形状に拡張された形状とされている。また、先端部収容部材１５は、先端部６ａを嵌挿して収容できる形状とされている。先端部６ａは、先端部収容部材１５の側部開口１８より嵌挿し、嵌合部１９に収容することができる。また、先端部６ａを側部開口１８に嵌挿する際、先端部６ａに連続する根本部６ｂは、側部開口１８に連続する前部開口１７を通して挿通させることができる。嵌合部１９に収容した先端部６ａは、前部開口１７を通して外れないようになっている。このことにより、オス金具４とメス金具５とを連結することが可能となる。
【００４５】
図３（ｂ）は、突出部材６および先端部収容部材１５を例示した第２の図である。図３（ｂ）に示す突出部材６の先端部６ａは、セグメントの内周方向および外周方向に角柱状のものが連結された形状とされている。また、先端部収容部材１５は、図３（ａ）に示す先端部収容部材１５と同様、先端部６ａを嵌挿して収容できる形状とされている。先端部６ａは、先端部収容部材１５の側部開口１８より嵌挿し、嵌合部１９に収容することができる。
【００４６】
図３（ｃ）は、突出部材６および先端部収容部材１５を例示した第３の図である。図３（ｃ）に示す突出部材６の先端部６ａは、セグメントの内周方向および外周方向に半円筒状のものが連結された形状とされている。また、先端部収容部材１５は、図３（ａ）および図３（ｂ）に示す先端部収容部材１５と同様、先端部６ａを嵌挿して収容できる形状とされている。先端部６ａは、先端部収容部材１５の側部開口１８より嵌挿し、嵌合部１９に収容することができる。本発明において先端部６ａは、これらの例示に限らず、根本部６ｂより拡張した形状とされていればいかなる形状であっても良い。ただし、本発明において先端部６ａは、嵌合部１９に収容して連結した際に、容易に前部開口１７を通して外れない程度に拡張されていることが必要である。
【００４７】
図４は、本発明のセグメント用継手の収容部材７、末端部６ｃおよび係止部材８を例示した図である。図４（ａ）は、収容部材７、末端部６ｃおよび係止部材８を例示した第１の図である。図４（ａ）に示す末端部６ｃは、根本部６ｂに連続し、所定位置に穴９が設けられている。図４（ａ）に示す穴９は、セグメント内周側に向いた開口とされていて、穴９の内周部分にねじ切りされているボルト穴となっている。また、第２の収容部７ｂには、末端部６ｃのほか、係止部材８の拡径部１１も収容されている。図４（ａ）に示す係止部材８は、拡径部１１のほか、セグメント内周側に配置される回転部１４と、拡径部１１と回転部１４とを連結する軸部１３とから構成されている。軸部１３は、セグメント１ａに設けられた貫通孔１２および収容部材７に設けられた通孔１０内に挿設されている。図４（ａ）に示す実施の形態では、先端部６ａを収容した図２または図３に示す先端部収容部材１５を第１の収容部７ａに収容すると、末端部６ｃが押し込まれるように第２の収容部７ｂ内を移動する。また、拡径部１１上に穴９を備える末端部６ｃが配置されると、係止部材８の拡径部１１を挿設することができるようになる。この場合、係止部材８の回転部１４をスパナやレンチなどを使用して回転させることにより穴９内へ拡径部１１を挿入して締結させることができ、末端部６ｃと収容部材７とを係止させることができる。こうすることにより、収容した先端部収容部材１５が突出し、先端部収容部材１５からスライドして先端部６ａが外れないようにすることができる。本発明においては、穴９がボルト穴とされていなくても、通孔１０がボルト穴とされ、通孔１０に対応する軸部１３がねじ切りされていても良い。さらに、本発明においては、拡径部１１が先端から末端に向けて径が拡大したボルト、穴９が拡径部１１に適合するボルト穴とされていても良い。
【００４８】
図４（ｂ）は、収容部材７、末端部６ｃおよび係止部材８を例示した第２の図である。図４（ｂ）に示す末端部６ｃは、根本部６ｂに連続し、所定位置に穴９が設けられている。図４（ｂ）に示す穴９は、セグメント内周方向または外周方向に向いた通孔とされていて、穴９の内周部分にねじ切りされているボルト穴となっている。また、第２の収容部７ｂには、末端部６ｃのほか、係止部材８の拡径部１１も収容されている。さらに、拡径部１１は、第２の収容部７ｂおよび収容部材７に設けられた通孔１０の一部に収容されている。図４（ｂ）に示す係止部材８は、拡径部１１のほか、セグメント内周側に配置される回転部１４と、拡径部１１と回転部１４とを連結する軸部１３とから構成されている。軸部１３は、セグメントに設けられた貫通孔１２および収容部材７に設けられた通孔１０内に挿設されている。図４（ｂ）に示す実施の形態では、先端部６ａを収容した図２または図３に示す先端部収容部材１５を第１の収容部７ａに収容すると、末端部６ｃが押し込まれるように第２の収容部７ｂ内を移動する。図４（ｂ）に示す拡径部１１上に穴９を備える末端部６ｃが配置され、係止部材８の拡径部１１を挿設することができるようになる。係止部材８の回転部１４をスパナやレンチなどを使用して回転させると穴９内へ締結させることができ、末端部６ｃと収容部材７とに跨るように挿設することができる。図４（ａ）と同様に、収容した先端部収容部材１５が突出し、先端部収容部材１５からスライドして先端部６ａが外れないようにすることができる。本発明においては、拡径部１１が先端から末端に向けて径が拡大したボルト、穴９が拡径部１１に適合するボルト穴とされていても良い。
【００４９】
図４（ｃ）は、収容部材７、末端部６ｃおよび係止部材８を例示した第３の図である。図４（ｃ）に示す末端部６ｃは、根本部６ｂに連続し、所定位置に穴９が設けられている。図４（ｃ）に示す穴９は、セグメント内周方向または外周方向に向いた通孔とされている。また、第２の収容部７ｂには、末端部６ｃのほか、係止部材８の先端が挿入されている。係止部材８の先端には、ねじ切りされたボルトとされている。また、収容部材７の通孔１０に対向する位置に開口１０ａが設けられていて、通孔１０、穴９および開口１０ａが同一線上となるように配置されると、係止部材８を挿通させて開口１０ａに設けられたボルト穴に締結することができるようになっている。
【００５０】
図４（ｃ）に示す係止部材８は、セグメント内周側に配置される回転部１４と、拡径部１１と回転部１４とを連結する軸部１３とから構成されている。軸部１３は、セグメントに設けられた貫通孔１２および収容部材７に設けられた通孔１０内に挿設されている。図４（ｃ）に示す実施の形態では、先端部６ａを収容した図２または図３に示す先端部収容部材１５を第１の収容部７ａに収容すると、末端部６ｃが押し込まれるように第２の収容部７ｂ内を移動する。図４（ｃ）に示す係止部材８の先端上に穴９を備える末端部６ｃが配置され、穴９を通して通孔１０に対向する開口１０ａに締結することができるようになる。また、係止部材８の回転部１４をスパナやレンチなどを使用して回転させると開口１０ａに締結させることができ、末端部６ｃと収容部材７とに跨るように挿設することができる。図４（ａ）および図４（ｂ）と同様に、収容した先端部収容部材１５が突出し、先端部収容部材１５からスライドして先端部６ａが外れないようにすることができる。本発明においては、拡径部１１が先端から末端に向けて径が拡大したボルト、穴９が拡径部１１に適合するボルト穴とされていても良い。また、本発明においては、上述した実施の形態に限らず、末端部６ｃと収容部材７とに跨るように挿設されることにより突出部材７が突出しないように係止させることができるのであればいかなるものでも用いることができる。
【００５１】
図５は、本発明のセグメント用継手の第２の実施の形態を示した断面図である。図５に示すオス金具４は、突出部材６と、突出部材６を収容する収容部材７とを含んでいる。また、突出部材６は、テーパが形成され拡張した先端部６ａと、先端部６ａに連続する根本部６ｂと、所定位置に穴９が設けられた末端部６ｃと備えている。図５に示すオス金具４は、突出部材６を突出および収容可能とし、所定位置に通孔１０が設けられた収容部材７を備えている。また、図５に示すオス金具４は、突出部材６を収容部材７に収容し、末端部６ｃに設けられた穴９と収容部材７に設けられた通孔１０とに跨るように挿設され、突出部材６が突出しないように係止させることができる係止部材８を備えている。
【００５２】
図５に示す突出部材６は、根本部６ｂに比較して拡張した先端部６ａを備え、先端部６ａのメス金具５に向く面にテーパが形成されている。図５に示す先端部６ａは、セグメント１をトンネル坑内に配設した場合にセグメント１の内周方向および外周方向に拡張された形状とされている。図５に示す実施の形態では、先端部６ａは、トンネル軸方向への幅が根本部６ｂと同じとされ、セグメント１ｂの内周方向および外周方向に突出した三角柱状のものが平板の上下に設けられたような形状とされている。本発明のセグメント継手に用いられる突出部材６の先端部６ａの形状は、根本部６ｂと比較して拡張されていれば、いかなる別の形状のものでも用いることができる。ただし、先端部６ａの形状は、メス金具５の先端部収容部材１５に収容した場合に正面部開口１６から抜けない形状とする必要がある。
【００５３】
図５に示す突出部材６は、根本部６ｂの端部に末端部６ｃを備えている。図５に示す末端部６ｃは、Ｕ字金具と所定位置に一方から他方に向けて径が拡大する穴９が設けられた筒状部材とが溶接された構造となっている。また、末端部６ｃは、穴９が設けられた筒状部材がセグメント１ａの内周方向および外周方向に拡張されていて、突出部材６が収容部材７から外れないようになっている。本発明においては、上述したように末端部６ｃを設けなくても良く、突出部材６が収容部材７から外れる構造とされていても良い。
【００５４】
図５に示す収容部材７は、先端部６ａを嵌挿したメス金具５の一部を収容する第１の収容部７ａと、筒状部材を備える末端部６ｃを収容する第２の収容部７ｂと、根本部６ｂおよびＵ字金具が挿通可能な連通部７ｃとから構成されている。図５に示す第１の収容部７ａは、メス金具５に設けられたテーパ部を収容することができるようにテーパが形成されている。第２の収容部７ｂは、筒状部材を備える末端部６ｃが移動可能とされていて、連通部７ｃには、根本部６ｂおよび末端部６ｃの一部が挿通可能とされている。また、第２の収容部７ｂには、係止部材８を挿設するための通孔１０が設けられている。図５に示す実施の形態では、通孔１０は、係止部材８を挿通させるための通孔とされている。
【００５５】
図５に示す係止部材８は、上述したように先端から末端に向けて径が拡大した拡径部１１と、通孔１０およびセグメント１ａに設けられた貫通孔１２に挿設される軸部１３と、セグメント１ａの内周側に配設される回転部１４とから構成されている。図５に示す拡径部１１を有する係止部材８は、オス金具４とメス金具５との間に張力を与えることができる。図５に示す拡径部１１は、穴９に挿入するにしたがって張力を増加することができる。このように、図５に示す係止部材８は、継手間で張力を有する構造とされているため、継手部で発生するひび割れなどを減少させることができる。
【００５６】
図５に示すメス金具５は、先端部収容部材１５からなり、セグメント端部３ｂの、オス金具４と対向する位置に配設されている。図５に示す先端部収容部材１５は、オス金具４に設けられた第１の収容部７ａに形成されたテーパに隣接して収容できるように、オス金具４に対向する正面部１６にテーパが形成されている。また、正面部１６には、オス金具４の先端部６ａを嵌挿するとともに根本部６ｂを挿通させるための正面部開口１７が設けられている。さらに、オス金具４とメス金具５との連結は、セグメント１ｂをトンネル軸方向に滑動、すなわちスライドさせるようにして嵌挿するため、先端部収容部材１５の側部に側部開口１８が設けられている。オス金具４の先端部６ａは、側部開口１８を通してスライドさせ、先端部収容部材１５に収容されるようになっている。また、図５に示す先端部収容部材１５は、オス金具４の先端部６ａを嵌挿させて収容する嵌合部１９が設けられ、嵌合部１９は、先端部６ａに形成されたテーパと隣接するようにテーパが形成されている。
【００５７】
図５に示す収容部材７および先端部収容部材１５は、セグメント１ａおよびセグメント１ｂに固定するためにアンカー２０ａ、２０ｂが設けられている。また、図５に示すアンカー２０ａ、２０ｂは、セグメント１ａ、１ｂの周方向に延びるように配設されている。
【００５８】
図６は、図５に示すオス金具４とメス金具５とを連結したところを拡大して示した図である。図６（ａ）は、オス金具４およびメス金具５をトンネル軸方向から見たところを示した断面図であり、図６（ｂ）は、オス金具４およびメス金具５をセグメント１ａ、１ｂをトンネル坑内に配設し、セグメントの内周側または外周側から見たところを示した断面図である。図６（ａ）、（ｂ）に示すオス金具４とメス金具５との連結は、上述したようにして行うことができる。図６（ｂ）に示すセグメント１ａには、先端部収容部材１５の嵌合部１９のテーパに連続するテーパ部１ｃが設けられていて、オス金具４の先端部６ａのテーパをテーパ部１ｃに隣接させながらスライドさせ、先端部収容部材１５に収容することができる。図６に示すオス金具４の突出部材６は、テーパ部１ｃをスライドさせて側部開口１８を通して嵌挿され、先端部６ａは嵌合部１９に、根本部６ｂの一部は正面部開口１７に配置される。本発明のセグメント用継手は、嵌合部１９に収容した先端部６ａが正面部開口１７を通して抜けない構造となっている。すなわち、正面部開口１７は、根本部６ｂが挿通可能な大きさ、形状とされていて、拡張した先端部６ａが通り抜けることができないようになっている。
【００５９】
図６に示す実施の形態では、先端部６ａを嵌合部１９に収容した後、上述した係止部材８の拡径部１１が末端部６ｃに設けられる穴９に挿入される。図６に示す末端部６ｃは、Ｕ字金具と、Ｕ字金具に穴９が設けられた筒状部材が溶接された構造とされている。拡径部１１は、セグメント１ａの内周方向に向けて径が拡大されていて、挿入するにつれて突出部材６を収容部材７に引き込むことができるようになっている。引き込むといった張力を与えられると、先端部収容部材１５の正面部１６が第１の収容部７ａに収容され、セグメント端部３ａとセグメント端部３ｂとが隣接した状態となりセグメント１ａとセグメント１ｂとが固定される。セグメント端部３ａとセグメント端部３ｂとが隣接した状態であること、正面部１６が第１の収容部７ａに収容されていることにより、嵌合部１９に収容された先端部６ａが再びスライドすることがなくなり、オス金具４とメス金具５とが外れないようになっている。
【００６０】
図６（ａ）、（ｂ）に示す係止部材８は、上述したように拡径部１１と、軸部１３と、図５に示す回転部１４とを備えており、回転部１４を回転させることにより穴９に挿入することができるようになっている。本発明においては、上述した拡径ボルトでなくても良く、拡径部１１を有するものであればいかなるものでも用いることができる。また、拡径部１１の先端から末端の長さに対する拡径する割合は、適宜設定することができる。さらに、セグメント１ａ、１ｂの厚さ、オス金具４またはメス金具５の配設位置などにより軸部１３の長さ、径も適宜設定することができる。
【００６１】
図７は、本発明のセグメント用継手の第３の実施の形態を示した断面図である。図７に示すセグメント用継手は、メス金具５に収容部材２１および係止部材８を備えていて、オス金具４がセグメント１ａに配設されている。図７に示すオス金具４は、テーパが形成され拡張した先端部６ａと、端部が拡張した根本部６ｂと、拡張した根本部６ｂと先端部６ａに連続する根本部６ｂとを収容する収容部材２２とから構成されている。図７に示す実施の形態では、端部が拡張した根本部６ｂを用いることにより収容部材２２から突出部材６が抜けないようになっている。
【００６２】
図７に示すメス金具５は、オス金具４の先端部６ａを収容する先端部収容部材１５と、先端部収容部材１５を収容するための収容部材２１と、係止部材８とを備えている。先端部収容部材１５は、オス金具４の先端部６ａを収容する嵌合部１９と、側部開口１８と、正面部開口１７と、穴２３が設けられ、端部が拡張した末端部２４とを備えている。図７に示す先端部収容部材１５は、突出させて先端部６ａを嵌挿させて収容し、メス金具５に設けられた収容部材２１に再び押し込むことによって収容し、係止部材８を用いて先端部収容部材１５が突出しなように係止させることができる。係止部材８としては、上述したものを用いることができ、張力を増加させて固定することができる。図７に示す末端部２４は、図５に示す末端部６ｃと同様、所定位置に一方から他方に向けて径が拡大した穴２３が設けられている。また、末端部２４は、穴２３が設けられた部分がセグメント１ｂの内周方向および外周方向に拡張されていて、先端部収容部材１５が収容部材２１から外れないようになっている。
【００６３】
図７に示す収容部材２１は、先端部収容部材１５を収容する第１の収容部２１ａと、拡張した末端部２４ａを収容する第２の収容部２１ｂと、拡張していない末端部２４ｂが挿通可能な連通部２１ｃとから構成されている。図７に示す第１の収容部２１ａは、先端部収容部材１５を収容することができ、第２の収容部２１ｂは、拡張した末端部２４ａが移動可能とされていて、連通部２１ｃには、拡張していない末端部２４ｂが挿通されている。また、第２の収容部２１ｂには、係止部材８を挿設するための通孔１０が設けられている。図７に示す実施の形態では、通孔１０は、係止部材８を挿通させるための通孔とされている。
【００６４】
図７に示す係止部材８は、図５に示す係止部材８と同様に拡径ボルトとされていて、拡径部１１がねじ切りされているものを用いることができる。図７に示す実施の形態では、オス金具４とメス金具５とを連結した後、回転部１４を回転させることにより拡径部１１が末端部２４に設けられた穴２３に挿入される。図７に示す穴２３は、拡径部１１に適合するボルト穴とされていて、回転部１４を回転することにより締結されるようになっている。また、回転部１４を回転させて締結することにより、先端部収容部材１５が収容部材２１に引き込まれ、張力を増加させて固定することができる。
【００６５】
また、図７に示す収容部材２１、２２は、セグメント１ａ、１ｂに固定するためにアンカー２０ａ、２０ｂが配設されている。図７に示すアンカー２０ａ、２０ｂも、上述した形状、長さ、本数、配設位置とすることができる。
【００６６】
以下、図８および図９を用いて図５および図７に示すオス金具４とメス金具５とを連結する方法について詳細に説明する。図８は、図５に示すオス金具４を備えるセグメント１ａとメス金具５を備えるセグメント１ｂとを連結するところ示した図である。図８に示す実施の形態においては、まず、オス金具４の突出部材６を突出させる。突出させる方法としては、オス金具４が設けられたセグメント１ａをオス金具４が下側に向くようにして突出させることができる。また、フックを有する部材により拡張した先端部６ａに引っ掛けるようにして突出させることもできる。次に、突出させた突出部材６の先端部６ａをメス金具５の先端部収容部材１５に挿入する。先端部６ａは、矢線Ａに示す方向へ移動させることにより先端部収容部材１５に挿入することができる。
【００６７】
図８に示すセグメント１ｂは、先端部収容部材１５の嵌合部１９に連続するテーパ部２５が設けられ、先端部６ａに形成されたテーパをテーパ部２５に隣接させながらスライドさせることにより側部開口１８を通して嵌合部１９に嵌挿させて収容することができる。先端部６ａを嵌合部１９に収容すると、矢線Ｂに示す方向にオス金具４を備えるセグメント１ａを移動させる。この場合、矢線Ｂに示す方向とは反対方向にメス金具５を備えるセグメント１ｂを移動させても良い。こうすることにより、矢線Ｃに示すように突出部材６が収容部材７に収容される。
【００６８】
図８に示す実施の形態では、先端部収容部材１５に形成されたテーパの一部がセグメント端部３ｂより突出していて、その突出した部分を収容部材７に収容することができるようになっている。このように収容すると、セグメント端部３ａとセグメント端部３ｂとが隣接する。本発明においては、この隣接する間にシール材などを設けることもできる。突出部材６が収容部材７に収容されると、末端部６ｃに設けられた穴９が図５に示す通孔１０および貫通孔１２と同一線上に配置され、上述した拡径ボルトといった図５に示す係止部材８を挿入することにより突出部材６が突出しないように係止される。また、拡径ボルトの場合、図５に示す回転部１４を回転させることにより穴９に締結され、張力を増加させて固定することができる。さらに、拡径ボルトと図５に示す貫通孔１２との隙間には、グラウトを充填して隙間を埋めることができる。上記グラウトとは、セメント、水、混和剤または混和材、砂などを混ぜてできた液のことをいう。
【００６９】
図９は、図７に示すオス金具４を備えるセグメント１ａとメス金具５を備えるセグメント１ｂとを連結するところ示した図である。図９に示す実施の形態では、まず、メス金具５の先端部収容部材１５を突出させる。突出させる方法としては、上述したオス金具４を突出させる方法と同様、メス金具５が設けられたセグメント１ｂをメス金具５が下側に向くようにして突出させることができる。また、フックを有する部材を用いて嵌合部１９に引っ掛けるようにして突出させることもできる。次に、突出させた先端部収容部材１５にオス金具４の先端部６ａを挿入する。先端部６ａは、矢線Ａに示す方向へ移動させることにより先端部収容部材１５に挿入することができる。
【００７０】
図９に示す先端部６ａは、先端部収容部材１５の側部開口１８を通して嵌合部１９に収容される。図９においては、先端部６ａに形成されたテーパを嵌合部１９に形成されたテーパに隣接させながらスライドさせることにより嵌合部１９に嵌挿させて収容することができる。先端部６ａを嵌合部１９に収容すると、矢線Ｂに示す方向にオス金具４を備えるセグメント１ａを移動させる。この場合、矢線Ｂに示す方向とは反対方向にメス金具５を備えるセグメント１ｂを移動させても良い。こうすることにより、矢線Ｃに示すように突出部材６の先端部６ａが収容された先端部収容部材１５を収容部材２１に収容することができる。このように収容すると、セグメント端部３ａとセグメント端部３ｂとが隣接する。本発明においては、この隣接する間にシール材などを設けることもできる。先端部収容部材１５が収容部材２１に収容されると、末端部２４に設けられた穴２３が通孔１０および貫通孔１２と同一線上に配置され、上述した拡径ボルトといった係止部材８を挿入することができる。図７に示す係止部材８を挿入することにより、先端部収容部材１５が突出しないように固定することができる。また、図７に示す係止部材８として上述した拡径ボルトを使用する場合、図７に示す回転部１４を回転させることにより穴２３に締結され、先端部収容部材１５を収容部材２１に引き込む張力を増加させることにより固定することができる。さらに、拡径ボルトと図７に示す貫通孔１２との隙間には、上述したようにグラウトを充填して隙間を埋めることができる。
【００７１】
本発明をこれまで図面に示した実施の形態により詳細に説明を加えてきたが、本発明のセグメント用継手に用いられる材料、各種の寸法、形状などについては、従来知られたいかなるものでも適宜、本発明の効果を奏する限り用いることができる。また、これまで本発明の継手構造体を、シールド工法により構築されるトンネルの隣接するセグメントを連結するためのセグメント継手に適用する実施の形態をもって説明してきたが、本発明の継手構造体は、シールド工法のための継手以外にも、建設・土木分野において迅速、かつ確実に隣接部材を連結することが要求される施工において広く適用することができるものである。
【００７２】
【発明の効果】
上述したように、本発明によれば、スライドさせて嵌め込み、締結することより確実かつ容易に連結できる継手構造体、および該継手構造体をセグメントリング間の連結をトンネル周方向へ容易に行うことができ、施工性を著しく改善するセグメント用継手、該セグメント用継手を用いるセグメント、およびシールドトンネルが提供できる。
【００７３】
また、本発明によれば、係止部材の一部がセグメントの内周側に現れるが、その面積が狭小であるため、セグメント内面または構築したシールドトンネルの内面を略平滑に仕上げることが可能となる。係止部材がセグメントの内周側に配設されるので、施工が容易である。係止部材に上述した拡径ボルトを使用する場合、ボルトの回転部がセグメントの内周側に配設されるため、特殊レンチなどの特殊工具を必要とすることなく、容易に締結でき、さらには再増締めを行うことも可能である。
【００７４】
本発明におけるセグメント用継手は、セグメントの外周側に配設することができ、セグメント外側の曲げ引張応力に対して耐久性のあるセグメントを提供することが可能となる。また、セグメント用継手をコンクリート製セグメントに適用する場合においても、継手間で張力を有する構造とされているため、継手部で発生するひび割れなどを減少させることができる。さらに、継手間に張力を与えて連結する構造であるため、継手間またはセグメント間に配置されるシール材の自由度が高くなる。
【図面の簡単な説明】
【図１】本発明によりセグメントが周方向に連結されて構築されるセグメントを示した斜視図。
【図２】本発明のセグメント用継手の第１の実施の形態を示した図。
【図３】本発明のセグメント用継手のオス金具の突出部材とメス金具の先端部収容部材の一部とを例示した図。
【図４】本発明のセグメント用継手の本発明のセグメント用継手の収容部材、末端部および係止部材を例示した図。
【図５】本発明のセグメント用継手の第２の実施の形態を示した図。
【図６】図５に示すセグメント用継手を用いて連結したところを拡大して示した図。
【図７】本発明のセグメント用継手の第３の実施の形態を示した図。
【図８】図５に示すオス金具を備えるセグメントとメス金具を備えるセグメントとを連結するところを示した図。
【図９】図７に示すオス金具を備えるセグメントとメス金具を備えるセグメントとを連結するところを示した図。
【符号の説明】
１、１ａ、１ｂ…セグメント
１ｃ…テーパ部
２…セグメントリング
３ａ、３ｂ…セグメント端部
４…オス金具
５…メス金具
６…突出部材
６ａ…先端部
６ｂ…根本部
６ｃ…末端部
７…収容部材
７ａ…第１の収容部
７ｂ…第２の収容部
７ｃ…連通部
８…係止部材
９…穴
１０…通孔
１０ａ…開口
１１…拡径部
１２…貫通孔
１３…軸部
１４…回転部
１５…先端部収容部材
１６…正面部
１７…正面部開口
１８…側部開口
１９…嵌合部
２０ａ、２０ｂ…アンカー
２１、２２…収容部材
２１ａ…第１の収容部
２１ｂ…第２の収容部
２１ｃ…連通部
２３…穴
２４、２４ａ、２４ｂ…末端部
２５…テーパ部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a joint structure and a joint for a segment used for a shield tunnel constructed by connecting segments in a circumferential direction and a tunnel axial direction inside a digging pit formed using the joint structure. The present invention relates to a segment including the joint and a shield tunnel.
[0002]
[Prior art]
Heretofore, various joint structures have been proposed for connecting members adjacent to each other in terms of material, fastening force, workability, and efficiency as required. For example, the shield method is used to construct tunnels and tunnels, drilling a hole underground using a shield excavator, and lining the inside of this hole with a segment ring, which is safe and reliable. The feature is that work can be performed.
[0003]
The segment ring used in this shield method is usually transported inside the excavation pit in a state of being divided into a plurality of segments, and is assembled along the inner diameter of the excavation pit at an internal construction site. For this reason, it is desired that the segments can be easily connected. Further, from the viewpoints of durability and safety, it is desired that the joint is not exposed on the inner surface of the tunnel.
[0004]
For connection between segments, for example, according to Japanese Patent Application Laid-Open No. 9-132997, a joint plate is provided on segments to be connected to each other, a bolt is passed through a washer using a bolt box, and a nut is passed through a washer. It is disclosed that this is done by tightening.
[0005]
Japanese Patent Application Laid-Open No. 10-220185 discloses a structure in which a pin is provided on one of the segments to be connected to each other, a pin hole is provided on the other, and one pin is inserted into the other pin hole. Have been. The protruding pin is provided with a locking projection projecting sideways, and the pin hole has a rotatable cylinder, a locking member inside the cylinder, and a rotation of the cylinder. There is disclosed a joint structure in which a mainspring biasing in the moving direction is provided and connected by a locking projection of a pin and a locking member of a pin hole.
[0006]
Further, Japanese Patent Application Laid-Open No. Hei 9-132997 discloses a method in which a bolt is used to pass a bolt through a joint plate through a high-rigid washer, and a nut is inserted into the passed bolt through a high-rigid washer and fastened. Is disclosed. Compared to the conventional connection method using bolts and nuts, the bolts can be easily fitted into the nuts and fastened using a high-rigidity washer, so that there is an advantage that the loosening of the nuts can be suppressed. However, the method disclosed in Japanese Patent Application Laid-Open No. 9-132997 needs to strictly control the position of the joint to be attached to the segment, the processing accuracy of the joint plate and the high-rigid washer, the installation position of the segment, and the like.
[0007]
Japanese Patent Application Laid-Open No. Hei 10-220185 discloses a locking method in which a projecting pin of a segment to be connected to each other is inserted by rotating a cylindrical body of a pin hole, and is projected to the side of the projecting pin. A method is disclosed in which segments can be easily connected by using a projection and a locking member inside a cylindrical body. However, in the method disclosed in Japanese Patent Application Laid-Open No. 10-220185, segments may not be connected if the positions of the pins and the pin holes are misaligned. Therefore, both of these installation positions and the installation positions of the segments are strictly managed. There is a need to. Further, in order to fix the segment, it is necessary to strictly control the position of the locking projection provided on the pin and the position and strength of the locking member provided on the pin hole.
[0008]
Further, in the conventional example using the above-described pins, bolts, and nuts, there is a problem that segment processing is complicated and segment cost is increased. Furthermore, even if a high-rigidity washer is used, since the nut is loosened, a post-process such as retightening of the nut is required, and it cannot be said that the cost and efficiency are sufficient. Further, in the above-described conventional example, there is a problem that when a concrete segment is used for the segment, cracks and water leaks at the joint portion often occur due to the necessity of providing a bolt box. Further, in the conventional example, the arrangement of the joints is concentrated on the inner peripheral side of the segment, and this structure is durable against the bending tensile stress inside the segment, but weak against the bending tensile stress outside the segment. There is. For this reason, there is a problem that the shield tunnel constructed by the pressure on the outer periphery of the segment such as the earth pressure is deformed.
[0009]
Japanese Patent Application Laid-Open No. 2001-173374 discloses that a male joint and a female joint provided on a segment are fitted to alleviate a temporary load, and a PC steel material is inserted in a state in which joint surfaces are adjacent to each other to prestress. It is disclosed that the connection is made by multiplying. This joint structure has advantages in that workability is good because no bolts and nuts are used, and no post-process is required. However, the joint structure disclosed in Japanese Patent Application Laid-Open No. 2001-173374 needs to provide a hole for inserting a PC steel material in a segment, and requires a large number of PC steel materials to connect the segments to form a tunnel. was there.
[0010]
[Problems to be solved by the invention]
Therefore, it is possible to provide a joint structure that can easily and quickly connect members adjacent to each other, and further reduce the labor by connecting the segments in the tunnel circumferential direction when constructing the shield method, It is an object of the present invention to provide a segment and a shield tunnel provided with a segment joint and a segment tunnel capable of constructing a shield tunnel which is durable against external pressure due to earth pressure and the like, and which is low in cost. And
[0011]
[Means for Solving the Problems]
The above object of the present invention is achieved by providing a joint structure of the present invention, a joint for a segment using the joint structure, a segment, and a shield tunnel.
[0012]
According to the first aspect of the present invention,A joint structure, wherein the joint structure comprises:It is composed of a male bracket and a female bracket,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
A joint structure is provided in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project. Is done.
[0013]
According to the invention of claim 2 of the present invention, the locking member includes an enlarged diameter portion whose diameter is increased from the front end to the distal end, and the hole is a hole adapted to the enlarged diameter portion. The joint structure is provided, wherein the tension of the projecting member increases as the enlarged diameter portion is inserted into the hole.
[0014]
According to the third aspect of the present invention, there is provided a joint structure, wherein the distal end portion and the fitting portion are tapered.
[0015]
According to the invention of claim 4 of the present invention,A joint structure, wherein the joint structure comprises:It is composed of a male bracket and a female bracket,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
A joint structure is provided in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project. Is done.
[0016]
According to the invention of claim 5 of the present invention, there is provided a segment joint for connecting segments constructing a shield tunnel in a circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
A segment joint for accommodating the distal end portion accommodating the distal end portion, being accommodated in the accommodating member, and being locked by the locking member such that the projecting member accommodated in the accommodating member does not project. Is done.
[0017]
According to the invention of claim 6 of the present invention, the locking member includes a large-diameter portion whose diameter increases from a front end to a distal end, and the hole is a hole adapted to the large-diameter portion. The projecting member is provided with a segment joint, wherein the tension increases as the enlarged diameter portion is inserted into the hole.
[0018]
According to the invention of claim 7 of the present invention, there is provided a segment joint, wherein the distal end portion and the fitting portion are tapered.
[0019]
According to the invention of claim 8 of the present invention, there is provided a segment joint in which the distal end portion housing member and the housing member include an anchor for fixing to the segment.
[0020]
According to the invention of claim 9 of the present invention, it is a segment joint for connecting the segments constructing the shield tunnel in the circumferential direction of the tunnel, the joint comprising a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root connected to the distal end, and the female fitting is connected to the front opening through which the root can be inserted and the front opening. A side opening through which the distal end can be inserted, a fitting portion that is continuous with the front opening and the side opening, and can be accommodated so as to fit the distal end, and a terminal portion provided with a hole. A housing member provided with a through hole, and a locking member that can be inserted so as to straddle the through hole and the hole. With
A segment joint for accommodating the distal end portion accommodating the distal end portion, being accommodated in the accommodating member, and being locked by the locking member such that the projecting member accommodated in the accommodating member does not project. Is done.
[0021]
According to the invention of claim 10 of the present invention, it is a segment including a segment joint for connecting adjacent segments in a tunnel circumferential direction, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
A segment is provided in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project. .
[0022]
According to the eleventh aspect of the present invention, the locking member includes a large-diameter portion whose diameter increases from the front end to the distal end, and the hole is a hole that fits the large-diameter portion. The tension of the protruding member increases as the enlarged diameter portion is inserted into the hole.
[0023]
According to the twelfth aspect of the present invention, there is provided the segment, wherein the distal end portion and the fitting portion are tapered.
[0024]
According to the thirteenth aspect of the present invention, there is provided a segment in which the distal end portion accommodating member and the accommodating member include an anchor for fixing to the segment.
[0025]
According to the invention of claim 14 of the present invention, the segment is provided with a through hole penetrating toward the through hole, the locking member is inserted into the through hole, and the The through hole is filled with grout after the protruding member is locked, thereby providing a segment.
[0026]
According to the invention of claim 15 of the present invention, it is a segment including a segment joint for connecting adjacent segments in the circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
A segment is provided in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project. .
[0027]
According to the invention of claim 16 of the present invention, there is provided a shield tunnel constructed by connecting segments in a circumferential direction, and adjacent to each other in a tunnel circumferential direction.segmentAre connected by a male bracket and a female bracket,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
A shield tunnel is provided in which the distal end housing member receives the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project. You.
[0028]
According to the invention of claim 17 of the present invention, the locking member includes an enlarged diameter portion whose diameter is increased from the front end to the distal end, and the hole is a hole that fits the enlarged diameter portion. The shield tunnel is provided, wherein a tension of the projecting member increases as the enlarged diameter portion is inserted into the hole.
[0029]
According to the eighteenth aspect of the present invention, there is provided a shield tunnel, wherein the tip portion and the fitting portion are tapered.
[0030]
According to the invention of claim 19 of the present invention, there is provided a shield tunnel in which the distal end portion accommodating member and the accommodating member include an anchor for fixing to the segment.
[0031]
According to the invention of claim 20 of the present invention, the segment is provided with a through hole penetrating toward the through hole, the locking member is inserted into the through hole, and the The through tunnel is filled with grout after the protruding member is locked, thereby providing a shield tunnel.
[0032]
According to the twenty-first aspect of the present invention,A shield tunnel constructed by connecting segments in the circumferential direction, wherein the segments adjacent to each other in the tunnel circumferential direction are connected by a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
A shield tunnel is provided in which the distal end housing member receives the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project. You.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the joint structure of the present invention will be described in detail with an embodiment as a segment joint for connecting segments used in a shield method. FIG. 1 is a perspective view showing a segment ring 2 constructed by connecting segments 1 having a segment joint of the present invention in a circumferential direction. The segment ring 2 shown in FIG. 1 can be constructed by connecting the segments 1 in the circumferential direction inside the excavation pit using the segment joint of the present invention. The shield tunnel of the present invention is constructed by excavating in the tunnel axis direction using a shield jack or the like, and extending another segment ring continuous in the tunnel axis direction.
[0034]
The joint for a segment according to the present invention is configured such that a male fitting and a female fitting are paired, and the male fitting and the female fitting are segment ends 3a, 3b facing each other in the tunnel circumferential direction of the segment 1. And the segments 1 can be connected in the circumferential direction of the tunnel. In addition, in order to connect the segments 1 in the axial direction, for example, a conventionally known joint using a bolt and a nut can be used. The segment joint of the present invention can also be used in the tunnel axial direction. For the male fitting and the female fitting used for the segment joint of the present invention, materials such as cast iron and ceramics can be used. Furthermore, any material other than cast iron and ceramics can be used as long as it has sufficient strength to maintain the connection. Further, the segment joints of the present invention can be provided in the segment ends 3a, 3b in a number required for connection.
[0035]
FIG. 2 is a sectional view showing a first embodiment of the joint for a segment of the present invention. The segment joint shown in FIG. 2 includes a male fitting 4 and a female fitting 5, and the male fitting 4 is provided at the segment end 3 a of one segment 1 a and the female fitting is provided at the segment end 3 b of the other segment 1 b. 5 are provided. In FIG. 2, the segments 1a and 1b are connected in the tunnel circumferential direction using a segment joint. The male fitting 4 shown in FIG. 2 includes a protruding member 6, a housing member 7 for housing the protruding member 6, and a locking member 8 for locking the housed protruding member 6 to the housing member 7. The protruding member 6 shown in FIG. 2 includes an expanded distal end portion 6a, a root portion 6b continuous with the distal end portion 6a, and a distal end portion 6c provided with a hole 9 at a predetermined position and expanded as compared with the root portion 6b. Have. The housing member 7 is capable of projecting and housing the projecting member 6, and has a through hole 10 at a predetermined position. The locking member 8 shown in FIG. 2 can be inserted and installed so as to straddle the hole 9 provided in the distal end portion 6 c and the through hole 10 provided in the housing member 7 when the projecting member 6 is housed in the housing member 7. The projecting member 6 can be locked so as not to project from the housing member 7.
[0036]
The protruding member 6 shown in FIG. 2 includes a root portion 6b, and a distal end portion 6a and a distal end portion 6c which are expanded as compared with the root portion 6b. In the present invention, the root portion 6b can be a flat plate or the like having an appropriate thickness. Further, the root portion 6b can have a thickness that can withstand a predetermined load such as earth pressure when the segment 1a and the adjacent segment 1b are connected. In the present invention, the width of the root portion 6b can be appropriately selected so that the number of the male fittings 4 provided at the segment end portions 3a and the predetermined strength are provided. Further, the tip portion 6a has a shape that is expanded in the inner circumferential direction and the outer circumferential direction of the segment 1 when the segment 1 is disposed in the tunnel shaft. The width of the tip 6a can be the same as the width of the root 6b described above. In the embodiment shown in FIG. 2, the tip portion 6a has the same width in the tunnel axis direction as the root portion 6b, and triangular prisms protruding in the inner circumferential direction and the outer circumferential direction of the segment 1b are arranged above and below the flat plate. It is shaped as provided. The shape of the distal end portion 6a of the projecting member 6 used in the segment joint of the present invention can be any other shape as long as it is expanded as compared with the root portion 6b. However, the shape of the distal end portion 6a needs to be expanded to such an extent that the distal end portion 6a does not fall out of the front portion opening when housed in the distal end housing member of the female metal fitting 5 described later.
[0037]
The end 6c shown in FIG. 2 is provided at the end opposite to the tip 6a which is continuous with the root 6b. The end portion 6c shown in FIG. 2 is provided with a hole 9 at a predetermined position in a direction perpendicular to the direction in which the projecting member 6 projects. Further, the end portion 6c is partially expanded in the thickness direction of the segment 1b, that is, in the inner circumferential direction and the outer circumferential direction, as compared with the root portion 6b, so that the end portion 6c does not come off from the housing member 7. ing. Further, a hole 9 provided in a part of the end portion 6c shown in FIG. 2 is a bolt hole, and is fitted and fastened with a large-diameter bolt provided at the tip of the locking member 8. ing. In the present invention, the end portion 6c may be expanded in the tunnel axis direction, or may be formed in a shape expanded in all of the inner circumferential direction, the outer circumferential direction, and the tunnel axial direction. Further, in the present invention, the root portion 6b and the end portion 6c do not have to be divided, and the root portion 6b provided with the hole 9 may be used. Further, in the present invention, the protruding member 6 may be disengaged from the accommodating member 7. In this case, the protruding member 6 connected to the female metal fitting 5 is accommodated in the accommodating member 7, and the locking member 8 And the male fitting 4 and the female fitting 5 can be connected.
[0038]
The accommodation member 7 shown in FIG. 2 includes a first accommodation portion 7a for accommodating the female metal fitting 5 into which the distal end portion 6a is inserted, a second accommodation portion 7b for accommodating the distal end portion 6c, a root portion 6b, and a distal end portion. And a communication portion 7c for accommodating a part of the communication portion 6c. The first accommodating portion 7a shown in FIG. 2 is capable of accommodating a distal end portion accommodating member of the female metal fitting 5 described later in which the distal end portion 6a is fitted. The second housing portion 7b is configured such that the distal end portion 6c is movable, and the communication portion 7c is capable of inserting the root portion 6b and a part of the unexpanded distal end portion 6c. Further, a through hole 10 for inserting the locking member 8 is provided in the second accommodation portion 7b. In the embodiment shown in FIG. 2, the through hole 10 is a through hole through which the locking member 8 is inserted. In the present invention, both the hole 9 and the through hole 10 may be bolt holes for fixing the end portion 6c and the housing member 7. Further, the hole 9 is formed as a penetrated hole, and the through hole 10 and the second housing portion 7b on the side passing through the hole 9 are also provided with a through hole 10 formed as a bolt hole, and are fixed by both the through holes 10. It may be made to be done.
[0039]
The locking member 8 shown in FIG. 2 includes an enlarged diameter portion 11 which is expanded as compared with the through hole 10, a shaft portion 13 inserted into the through hole 12 provided in the through hole 10 and the segment 1a, and a segment 1a. And a rotating part 14 disposed on the inner peripheral side of the rotary member. In the embodiment shown in FIG. 2, the locking member 8 is11Only the bolts are threaded. The locking member 8 connects the male fitting 4 and the female fitting 5, and then rotates the rotating part 14 to increase the diameter of the enlarged part.11Can be inserted into a hole 9 provided in the distal end portion 6c and fastened. In the present invention, the locking member 8 can be inserted so as to straddle the hole 9 and the through hole 10, and can be any other than the above as long as it can prevent the projecting member 6 housed in the housing member 7 from projecting. But it can be used. In the present invention, the rotating portion 14 may be provided with a concave portion in the segment 1a and disposed inside the concave portion. Further, in the present invention, by changing the length of the shaft portion 13, the male fitting 4 can be provided at any position from the inner peripheral side to the outer peripheral side of the segment 1a. In the present invention, as shown in FIG. 2, the male fitting 4 can be provided on the outer peripheral side of the segment 1a, so that it is possible to provide durability against bending tensile stress outside the segment. Further, in the present invention, a part of the locking member appears on the inner peripheral side of the segment, but since the area is small, it is possible to finish the inner surface of the segment or the inner surface of the constructed shield tunnel substantially smoothly. . Further, in the present invention, since the rotating portion 14 appears on the inner peripheral side of the segment 1a, re-tightening can be easily performed without using a special wrench or the like.
[0040]
The female fitting 5 shown in FIG. 2 includes a distal end housing member 15 and is disposed at a position facing the male fitting 4 at the segment end 3b. A part of the distal end portion accommodating member 15 shown in FIG. 2 is projected so that the distal end portion 6a can be fitted therein, and the other is disposed in the segment 1b. The protruding portion of the distal end housing member 15 can be housed in the first housing portion 7 a provided on the male fitting 4. A front opening 16 is provided in the front portion 16 of the female fitting 5 so that the distal end portion 6a of the male fitting 4 can be inserted and the root 6b can be inserted therethrough. Further, the male fitting 4 and the female fitting 5 are connected by slidingly inserting the segment 1a or the segment 1b in the tunnel axial direction, that is, by sliding the segment 1a or the segment 1b. Is provided. The distal end portion 6 a of the male fitting 4 is housed in the distal end housing member 15 by being inserted so as to slide through the side opening 18. Further, the distal end housing member 15 shown in FIG. 2 includes a fitting portion 19 for inserting and housing the distal end portion 6a of the male fitting 4.
[0041]
In the embodiment shown in FIG. 2, as described above, the distal end portion 6a of the male fitting 4 is inserted into the fitting portion 19 of the distal end receiving member 15, and the distal end receiving member 15 is kept inserted with the distal end portion 6a. Is stored in the first storage portion 7a. The distal end portion 6a accommodated in the first accommodating portion 7a cannot be slid toward the side opening 18 of the distal end portion accommodating member 15. When the protruding distal end portion 6a is housed in the first housing portion 7a, the enlarged diameter portion 11 of the locking member 8 can be inserted into the hole 9. In FIG. 2, the enlarged diameter portion 11 of the locking member 8 is inserted into the hole 9, and the rotating portion 14 is rotated and fastened so that the distal end portion accommodating member 15 does not come off. The segment joint of the present invention can connect the segment 1a and the segment 1b as described above.
[0042]
The accommodation member 7 and the distal end accommodation member 15 shown in FIG. 2 are provided with anchors 20a and 20b for fixing to the segments 1a and 1b. The anchors 20a and 20b shown in FIG. 2 are disposed so as to extend in the circumferential direction of the segments 1a and 1b. In the present invention, the anchors 20a and 20b have shapes, lengths, and numbers that do not easily come off when the male fitting 4 and the female fitting 5 are connected, in addition to fixing the male fitting 4 and the female fitting 5 respectively. be able to. Further, the anchors 20a and 20b may be arranged not in the circumferential direction of the segments 1a and 1b but in the tunnel axis direction. In FIG. 2, the anchors 20a and 20b are rod-shaped, but may be rod-shaped and provided with a plurality of projections or the like so as not to be easily pulled out. Further, the anchors 20a and 20b can be disposed by welding or the like to each of the housing member 7 and the distal end housing member 15.
[0043]
In the present invention, the male fitting 4 can be provided at one end of the segments 1a and 1b, and the female fitting 5 can be provided at the other end. Further, the segments 1a and 1b provided with only the male fitting 4 and the segments 1a and 1b provided with only the female fitting 5 may be alternately connected. In the present invention, the male fitting 4 or the female fitting 5 provided at one end of each of the segments 1a and 1b can be provided at an appropriate number and position in consideration of the size and weight of the segments 1a and 1b. . In the present invention, the distal end housing member 15 can be made to protrude and be housed, and the distal end portion 6a and the fitting portion 19, the first housing portion 7a, and the front portion 16 are tapered. It is also possible to insert and connect using a thing.
[0044]
FIG. 3 is a view exemplifying the projecting member 6 of the male fitting 4 and a part of the distal end housing member 15 of the female fitting 5 of the segment joint of the present invention. FIG. 3A is a first diagram illustrating the protruding member 6 and the distal end housing member 15. The distal end portion 6a of the protruding member 6 shown in FIG. 3A has a shape expanded in a triangular shape in the inner and outer peripheral directions of the segment, similarly to the distal end portion 6a shown in FIG. Further, the distal end housing member 15 is shaped so that the distal end 6a can be inserted and housed therein. The distal end portion 6 a can be inserted through the side opening 18 of the distal end portion accommodating member 15 and accommodated in the fitting portion 19. When the tip 6a is inserted into the side opening 18, the root 6b connected to the tip 6a can be inserted through the front opening 17 connected to the side opening 18. The distal end portion 6 a accommodated in the fitting portion 19 does not come off through the front opening 17. Thus, the male fitting 4 and the female fitting 5 can be connected.
[0045]
FIG. 3B is a second diagram illustrating the protruding member 6 and the distal end housing member 15. The distal end portion 6a of the protruding member 6 shown in FIG. 3B has a shape in which prismatic members are connected in the inner circumferential direction and the outer circumferential direction of the segment. Further, like the distal end housing member 15 shown in FIG. 3A, the distal end housing member 15 has a shape capable of receiving the distal end portion 6a by being inserted therein. The distal end portion 6 a can be inserted through the side opening 18 of the distal end portion accommodating member 15 and accommodated in the fitting portion 19.
[0046]
FIG. 3C is a third diagram illustrating the protruding member 6 and the distal end housing member 15. The distal end portion 6a of the protruding member 6 shown in FIG. 3C has a shape in which semi-cylindrical members are connected in the inner and outer peripheral directions of the segment. Further, the distal end housing member 15 is shaped so as to be able to insert and house the distal end portion 6a, similarly to the distal end housing member 15 shown in FIGS. 3 (a) and 3 (b). The distal end portion 6 a can be inserted through the side opening 18 of the distal end portion accommodating member 15 and accommodated in the fitting portion 19. In the present invention, the tip portion 6a is not limited to these examples, and may have any shape as long as it has a shape expanded from the root portion 6b. However, in the present invention, it is necessary that the distal end portion 6a is expanded so as not to be easily removed through the front opening 17 when housed and connected to the fitting portion 19.
[0047]
FIG. 4 is a view exemplifying the accommodating member 7, the end portion 6c, and the locking member 8 of the segment joint according to the present invention. FIG. 4A is a first diagram illustrating the housing member 7, the end portion 6c, and the locking member 8. The terminal portion 6c shown in FIG. 4A is continuous with the root portion 6b, and has a hole 9 at a predetermined position. The hole 9 shown in FIG. 4A is an opening facing the inner peripheral side of the segment, and is a bolt hole which is threaded in the inner peripheral portion of the hole 9. Further, in addition to the end portion 6c, the enlarged diameter portion 11 of the locking member 8 is also housed in the second housing portion 7b. The locking member 8 shown in FIG. 4A includes an enlarged diameter portion 11, a rotating portion 14 arranged on the inner peripheral side of the segment, and a shaft portion 13 connecting the enlarged diameter portion 11 and the rotating portion 14. It is configured. The shaft portion 13 is inserted into the through hole 12 provided in the segment 1 a and the through hole 10 provided in the housing member 7. In the embodiment shown in FIG. 4A, when the distal end portion accommodating member 15 shown in FIG. 2 or 3 accommodating the distal end portion 6a is accommodated in the first accommodating portion 7a, the distal end portion 6c is pushed so as to be pushed in. It moves within the second storage section 7b. Further, when the distal end portion 6c having the hole 9 is disposed on the enlarged diameter portion 11, the enlarged diameter portion 11 of the locking member 8 can be inserted. In this case, by rotating the rotating portion 14 of the locking member 8 using a spanner or a wrench, the enlarged diameter portion 11 can be inserted into the hole 9 and fastened. Can be locked. By doing so, it is possible to prevent the accommodated distal end portion accommodating member 15 from projecting and sliding from the distal end portion accommodating member 15 to remove the distal end portion 6a. In the present invention, even though the hole 9 is not a bolt hole, the through hole 10 may be a bolt hole and the shaft portion 13 corresponding to the through hole 10 may be threaded. Further, in the present invention, the enlarged diameter portion 11 may be a bolt whose diameter increases from the front end to the distal end, and the hole 9 may be a bolt hole adapted to the enlarged diameter portion 11.
[0048]
FIG. 4B is a second diagram illustrating the housing member 7, the end portion 6c, and the locking member 8. The end 6c shown in FIG. 4 (b) is continuous with the root 6b and has a hole 9 at a predetermined position. Hole shown in FIG. 4 (b)9Are through holes oriented in the inner or outer circumferential direction of the segment.9It is a bolt hole that is threaded in the inner peripheral part. Further, in addition to the end portion 6c, the enlarged diameter portion 11 of the locking member 8 is also housed in the second housing portion 7b. Further, the enlarged diameter portion 11 is housed in a part of the through hole 10 provided in the second housing portion 7b and the housing member 7. The locking member 8 shown in FIG. 4B includes, in addition to the enlarged diameter portion 11, a rotating portion 14 arranged on the inner peripheral side of the segment and a shaft portion 13 connecting the enlarged diameter portion 11 and the rotating portion 14. It is configured. The shaft portion 13 is inserted into the through hole 12 provided in the segment and the through hole 10 provided in the housing member 7. In the embodiment shown in FIG. 4B, when the distal end housing member 15 shown in FIG. 2 or FIG. 3 that houses the distal end 6a is housed in the first housing portion 7a, the distal end portion 6c is pushed in so as to be pushed in. It moves within the second storage section 7b. The distal end portion 6c having the hole 9 is arranged on the enlarged diameter portion 11 shown in FIG. 4B, so that the enlarged diameter portion 11 of the locking member 8 can be inserted. When the rotating portion 14 of the locking member 8 is rotated using a spanner, a wrench, or the like, it can be fastened into the hole 9 and can be inserted and provided so as to straddle the end portion 6c and the housing member 7. Similarly to FIG. 4A, the stored distal end housing member 15 can be protruded and slid from the distal end housing member 15 to prevent the distal end portion 6 a from coming off. In the present invention, the enlarged diameter portion 11 may be a bolt whose diameter is increased from the front end to the distal end, and the hole 9 may be a bolt hole adapted to the enlarged diameter portion 11.
[0049]
FIG. 4C is a third diagram illustrating the housing member 7, the end portion 6c, and the locking member 8. The end 6c shown in FIG. 4 (c) is continuous with the root 6b and has a hole 9 at a predetermined position. The hole 9 shown in FIG. 4 (c) is a through hole oriented in the inner circumferential direction or the outer circumferential direction of the segment. Further, in addition to the end portion 6c, the tip of the locking member 8 is inserted into the second accommodation portion 7b. The distal end of the locking member 8 is a threaded bolt. An opening 10a is provided at a position facing the through hole 10 of the housing member 7, and when the through hole 10, the hole 9 and the opening 10a are arranged on the same line, the locking member 8 is inserted. Thus, it can be fastened to a bolt hole provided in the opening 10a.
[0050]
The locking member 8 shown in FIG. 4C includes a rotating part 14 arranged on the inner peripheral side of the segment, and a shaft part 13 connecting the enlarged diameter part 11 and the rotating part 14. The shaft portion 13 is inserted into the through hole 12 provided in the segment and the through hole 10 provided in the housing member 7. In the embodiment shown in FIG. 4C, when the distal end portion accommodating member 15 shown in FIG. 2 or FIG. 3 accommodating the distal end portion 6a is accommodated in the first accommodation portion 7a, the distal end portion 6c is pushed in so as to be pushed in. It moves within the second storage section 7b. A distal end 6c having a hole 9 is arranged on the tip of the locking member 8 shown in FIG. 4C, and can be fastened to the opening 10a facing the through hole 10 through the hole 9. When the rotating portion 14 of the locking member 8 is rotated using a spanner, a wrench, or the like, it can be fastened to the opening 10a, and can be inserted and provided so as to straddle the distal end portion 6c and the housing member 7. 4 (a) and 4 (b), the stored distal end housing member 15 protrudes and can be slid from the distal end housing member 15 to prevent the distal end portion 6a from coming off. In the present invention, the enlarged diameter portion 11 may be a bolt whose diameter is increased from the front end to the distal end, and the hole 9 may be a bolt hole adapted to the enlarged diameter portion 11. Further, in the present invention, the present invention is not limited to the above-described embodiment, and it is possible to lock the protruding member 7 so as not to protrude by being inserted so as to straddle the end portion 6c and the housing member 7. Any material can be used.
[0051]
FIG. 5 is a sectional view showing a second embodiment of the joint for a segment of the present invention. The male fitting 4 shown in FIG. 5 includes a projecting member 6 and a housing member 7 that houses the projecting member 6. Further, the protruding member 6 includes a distal end portion 6a which is tapered and expanded, a root portion 6b continuous with the distal end portion 6a, and a distal end portion 6c provided with a hole 9 at a predetermined position. The male fitting 4 shown in FIG. 5 is provided with a housing member 7 capable of projecting and housing the projecting member 6 and having a through hole 10 at a predetermined position. The male fitting 4 shown in FIG. 5 accommodates the projecting member 6 in the accommodation member 7 and is inserted and installed so as to straddle the hole 9 provided in the end portion 6c and the through hole 10 provided in the accommodation member 7. And a locking member 8 that can be locked so that the protruding member 6 does not protrude.
[0052]
The protruding member 6 shown in FIG. 5 includes a distal end 6a that is expanded as compared with the root 6b, and a taper is formed on a surface of the distal end 6a facing the female metal fitting 5. The tip portion 6a shown in FIG. 5 has a shape that is expanded in the inner circumferential direction and the outer circumferential direction of the segment 1 when the segment 1 is disposed in the tunnel pit. In the embodiment shown in FIG. 5, the tip portion 6a has the same width in the tunnel axis direction as the root portion 6b, and triangular prisms protruding in the inner circumferential direction and the outer circumferential direction of the segment 1b are arranged above and below the flat plate. It is shaped as provided. The shape of the distal end portion 6a of the projecting member 6 used in the segment joint of the present invention can be any other shape as long as it is expanded as compared with the root portion 6b. However, the shape of the distal end portion 6a needs to be a shape that does not fall out of the front opening 16 when housed in the distal end housing member 15 of the female metal fitting 5.
[0053]
The protruding member 6 shown in FIG. 5 has a distal end 6c at the end of the root 6b. The distal end portion 6c shown in FIG. 5 has a structure in which a U-shaped fitting and a cylindrical member provided with a hole 9 whose diameter increases from one side to the other at a predetermined position are welded. In addition, the end portion 6c is such that the cylindrical member provided with the hole 9 is expanded in the inner circumferential direction and the outer circumferential direction of the segment 1a, so that the protruding member 6 does not come off the housing member 7. In the present invention, the distal end portion 6c may not be provided as described above, and the projecting member 6 may be configured to be detached from the housing member 7.
[0054]
The housing member 7 shown in FIG. 5 includes a first housing portion 7a for housing a part of the female metal fitting 5 into which the distal end portion 6a is inserted, and a second housing portion 7b for housing a distal end portion 6c having a cylindrical member. And a communication portion 7c through which a base portion 6b and a U-shaped bracket can be inserted. The first accommodating portion 7a shown in FIG. 5 is tapered so that the tapered portion provided on the female metal fitting 5 can be accommodated. In the second housing portion 7b, a distal end portion 6c including a tubular member is movable, and the communication portion 7c is capable of inserting a part of the root portion 6b and the distal end portion 6c. Further, a through hole 10 for inserting the locking member 8 is provided in the second accommodation portion 7b. In the embodiment shown in FIG. 5, the through hole 10 is a through hole through which the locking member 8 is inserted.
[0055]
The locking member 8 shown in FIG. 5 has an enlarged diameter portion 11 whose diameter increases from the front end to the end as described above, and a shaft portion inserted into the through hole 12 provided in the through hole 10 and the segment 1a. 13 and a rotating portion 14 disposed on the inner peripheral side of the segment 1a. The locking member 8 having the enlarged diameter portion 11 shown in FIG. 5 can apply tension between the male fitting 4 and the female fitting 5. The enlarged diameter portion 11 shown in FIG. 5 can increase the tension as it is inserted into the hole 9. As described above, since the locking member 8 shown in FIG. 5 has a structure having a tension between the joints, it is possible to reduce cracks and the like generated at the joints.
[0056]
The female metal fitting 5 shown in FIG. 5 includes a distal end housing member 15 and is provided at a position of the segment end 3b facing the male metal fitting 4. The front end housing member 15 shown in FIG. 5 has a tapered front part 16 facing the male fitting 4 so as to be able to be housed adjacent to the taper formed in the first accommodation part 7a provided in the male fitting 4. Is formed. The front portion 16 is provided with a front opening 17 through which the distal end portion 6a of the male fitting 4 is inserted and the root portion 6b is inserted. Further, since the male fitting 4 and the female fitting 5 are fitted by sliding the segment 1b in the tunnel axial direction, that is, by sliding the segment 1b, a side opening 18 is provided on the side of the tip end accommodating member 15. ing. The distal end 6 a of the male fitting 4 is slid through the side opening 18 and is accommodated in the distal end accommodating member 15. Further, the distal end housing member 15 shown in FIG. 5 is provided with a fitting portion 19 for inserting and housing the distal end portion 6a of the male fitting 4, and the fitting portion 19 has a taper formed on the distal end portion 6a. A taper is formed so as to be adjacent.
[0057]
The accommodation member 7 and the distal end accommodation member 15 shown in FIG. 5 are provided with anchors 20a and 20b for fixing to the segments 1a and 1b. The anchors 20a and 20b shown in FIG. 5 are arranged so as to extend in the circumferential direction of the segments 1a and 1b.
[0058]
FIG. 6 is an enlarged view showing a place where the male fitting 4 and the female fitting 5 shown in FIG. 5 are connected. FIG. 6A is a cross-sectional view showing the male fitting 4 and the female fitting 5 viewed from the tunnel axis direction. FIG. 6B is a sectional view showing the male fitting 4 and the female fitting 5 with the segments 1a and 1b. It is arrange | positioned in a tunnel well and is sectional drawing which showed the place seen from the inner peripheral side or the outer peripheral side of the segment. The connection between the male fitting 4 and the female fitting 5 shown in FIGS. 6A and 6B can be performed as described above. The segment 1a shown in FIG. 6 (b) is provided with a taper portion 1c which is continuous with the taper of the fitting portion 19 of the tip portion accommodation member 15, and the taper of the tip portion 6a of the male fitting 4 is changed to the taper portion 1c. It can be slid while being adjacent to and housed in the distal end housing member 15. The projecting member 6 of the male fitting 4 shown in FIG. 6 is inserted through the side opening 18 by sliding the tapered part 1c, the tip part 6a is fitted into the fitting part 19, and a part of the root part 6b is formed in the front part opening 17 Placed in The segment joint according to the present invention has a structure in which the distal end portion 6 a accommodated in the fitting portion 19 does not fall out through the front opening 17. That is, the front opening 17 is sized and shaped to allow the root 6b to pass therethrough, so that the expanded distal end 6a cannot pass through.
[0059]
In the embodiment shown in FIG. 6, after the distal end portion 6a is accommodated in the fitting portion 19, the enlarged diameter portion 11 of the locking member 8 described above is inserted into the hole 9 provided in the distal end portion 6c. The terminal portion 6c shown in FIG. 6 has a structure in which a U-shaped fitting and a tubular member having a hole 9 provided in the U-shaped fitting are welded. The diameter of the enlarged diameter portion 11 is increased in the inner circumferential direction of the segment 1a, and the projecting member 6 can be drawn into the housing member 7 as it is inserted. When a tension such as retraction is given, the front portion 16 of the distal end portion housing member 15 is housed in the first housing portion 7a, and the segment end portions 3a and 3b are adjacent to each other, so that the segments 1a and 1b are separated. Fixed. Since the segment end portion 3a and the segment end portion 3b are adjacent to each other and the front portion 16 is accommodated in the first accommodation portion 7a, the distal end portion 6a accommodated in the fitting portion 19 slides again. And the male fitting 4 and the female fitting 5 are prevented from coming off.
[0060]
The locking member 8 shown in FIGS. 6A and 6B includes the enlarged diameter portion 11, the shaft portion 13, and the rotating portion 14 shown in FIG. By doing so, it can be inserted into the hole 9. In the present invention, it is not necessary to use the above-described enlarged bolt, and any bolt having an enlarged portion 11 can be used. In addition, the ratio of the diameter expansion to the length from the front end to the end of the enlarged diameter portion 11 can be appropriately set. Further, the length and diameter of the shaft portion 13 can be appropriately set depending on the thickness of the segments 1a and 1b, the arrangement position of the male fitting 4 or the female fitting 5, and the like.
[0061]
FIG. 7 is a cross-sectional view showing a third embodiment of the segment joint according to the present invention. The segment joint shown in FIG. 7 has a female member 5 provided with an accommodating member 21 and a locking member 8, and a male member 4 is disposed on the segment 1a. The male fitting 4 shown in FIG. 7 contains a tapered and expanded distal end 6a, an expanded root 6b, and a root 6b continuous with the expanded root 6b and the distal end 6a. And a member 22. In the embodiment shown in FIG. 7, the protruding member 6 is prevented from falling out of the housing member 22 by using the root portion 6 b having an expanded end.
[0062]
The female metal fitting 5 shown in FIG. 7 includes a distal end housing member 15 that houses the distal end portion 6 a of the male metal fitting 4, a housing member 21 that houses the distal end housing member 15, and the locking member 8. . The distal end receiving member 15 includes a fitting portion 19 that receives the distal end portion 6a of the male fitting 4, a side opening 18, a front opening 17, a distal end 24 having a hole 23, and an enlarged end. It has. The distal end portion accommodating member 15 shown in FIG. 7 is housed by being protruded and fitted with the distal end portion 6a inserted therein, and pushed again into the accommodating member 21 provided on the female metal fitting 5 to be accommodated. The distal end housing member 15 can be locked so as not to protrude. The above-mentioned thing can be used as the locking member 8, and it can fix by increasing tension. The distal end portion 24 shown in FIG. 7 is provided with a hole 23 whose diameter increases from one side to the other at a predetermined position, similarly to the distal end portion 6c shown in FIG. In addition, the end portion 24 has a portion provided with the hole 23 extended in the inner circumferential direction and the outer circumferential direction of the segment 1 b, so that the distal end housing member 15 does not come off from the housing member 21.
[0063]
The accommodation member 21 shown in FIG. 7 has a first accommodation portion 21a for accommodating the distal end accommodation member 15, a second accommodation portion 21b for accommodating the expanded end portion 24a, and a non-expanded end portion 24b inserted therethrough. And a possible communication portion 21c. The first accommodating portion 21a shown in FIG. 7 can accommodate the distal end accommodating member 15, and the second accommodating portion 21b has an extended distal end portion 24a that is movable. , The unexpanded end 24b is inserted. Further, a through hole 10 into which the locking member 8 is inserted is provided in the second accommodation portion 21b. In the embodiment shown in FIG. 7, the through hole 10 is a through hole through which the locking member 8 is inserted.
[0064]
The locking member 8 shown in FIG. 7 is a bolt with a large diameter, like the locking member 8 shown in FIG. In the embodiment shown in FIG. 7, after connecting the male fitting 4 and the female fitting 5, the enlarged diameter part 11 is inserted into the hole 23 provided in the end part 24 by rotating the rotating part 14. The hole 23 shown in FIG. 7 is a bolt hole adapted to the enlarged diameter portion 11, and is fastened by rotating the rotating portion 14. Further, by rotating and fastening the rotating portion 14, the distal end portion housing member 15 is pulled into the housing member 21, and the tension can be increased and fixed.
[0065]
Further, the housing members 21 and 22 shown in FIG. 7 are provided with anchors 20a and 20b for fixing to the segments 1a and 1b. The anchors 20a and 20b shown in FIG. 7 can also have the above-described shape, length, number, and arrangement position.
[0066]
Hereinafter, a method of connecting the male fitting 4 and the female fitting 5 shown in FIGS. 5 and 7 will be described in detail with reference to FIGS. 8 and 9. FIG. 8 is a view showing the connection between the segment 1a having the male fitting 4 and the segment 1b having the female fitting 5 shown in FIG. In the embodiment shown in FIG. 8, first, the projecting member 6 of the male fitting 4 is made to project. As a method of projecting, the segment 1a provided with the male fitting 4 can be projected so that the male fitting 4 faces downward. Further, it can be projected so as to be hooked on the distal end portion 6a expanded by a member having a hook. Next, the distal end portion 6 a of the protruding protruding member 6 is inserted into the distal end portion accommodating member 15 of the female fitting 5. The distal end portion 6a can be inserted into the distal end portion accommodating member 15 by moving in the direction indicated by the arrow A.
[0067]
The segment 1b shown in FIG. 8 is provided with a tapered portion 25 which is continuous with the fitting portion 19 of the distal end housing member 15, and slides the taper formed at the distal end 6a while making the taper adjacent to the tapered portion 25. It can be fitted and accommodated in the fitting portion 19 through the opening 18. When the distal end portion 6a is accommodated in the fitting portion 19, the segment 1a including the male fitting 4 is moved in the direction shown by the arrow B. In this case, the segment 1b provided with the female fitting 5 may be moved in a direction opposite to the direction shown by the arrow B. By doing so, the protruding member 6 is housed in the housing member 7 as shown by the arrow C.
[0068]
In the embodiment shown in FIG. 8, a part of the taper formed in the distal end portion accommodating member 15 projects from the segment end 3b, and the projecting portion can be accommodated in the accommodating member 7. I have. When accommodated in this manner, the segment end 3a and the segment end 3b are adjacent. In the present invention, a sealing material or the like may be provided between the adjacent members. When the protruding member 6 is accommodated in the accommodating member 7, the hole 9 provided in the end portion 6c is arranged on the same line as the through hole 10 and the through hole 12 shown in FIG. By inserting the locking member 8 shown, the protruding member 6 is locked so as not to protrude. In the case of an enlarged bolt, the bolt is fastened to the hole 9 by rotating the rotating part 14 shown in FIG. 5, and can be fixed by increasing the tension. Further, the gap between the enlarged bolt and the through hole 12 shown in FIG. 5 can be filled with grout to fill the gap. The above grout refers to a liquid obtained by mixing cement, water, an admixture or an admixture, sand, and the like.
[0069]
FIG. 9 is a diagram showing the connection between the segment 1a having the male fitting 4 and the segment 1b having the female fitting 5 shown in FIG. In the embodiment shown in FIG. 9, first, the distal end housing member 15 of the female metal fitting 5 is projected. As a method of projecting, similarly to the method of projecting the male fitting 4 described above, the segment 1b provided with the female fitting 5 can be projected so that the female fitting 5 faces downward. In addition, it is also possible to use a member having a hook to protrude so as to be hooked on the fitting portion 19. Next, the distal end 6a of the male fitting 4 is inserted into the protruding distal end housing member 15. The distal end portion 6a can be inserted into the distal end portion accommodating member 15 by moving in the direction indicated by the arrow A.
[0070]
The distal end portion 6 a shown in FIG. 9 is housed in the fitting portion 19 through the side opening 18 of the distal end portion housing member 15. In FIG. 9, by sliding the taper formed on the distal end portion 6 a adjacent to the taper formed on the fitting portion 19, the taper can be inserted into and housed in the fitting portion 19. When the distal end portion 6a is accommodated in the fitting portion 19, the segment 1a including the male fitting 4 is moved in the direction shown by the arrow B. In this case, the segment 1b provided with the female fitting 5 may be moved in a direction opposite to the direction shown by the arrow B. By doing so, the distal end housing member 15 in which the distal end portion 6a of the protruding member 6 is housed can be housed in the housing member 21 as shown by the arrow C. When accommodated in this manner, the segment end 3a and the segment end 3b are adjacent. In the present invention, a sealing material or the like may be provided between the adjacent members. When the distal end housing member 15 is housed in the housing member 21, the hole 23 provided in the distal end portion 24 is arranged on the same line as the through hole 10 and the through hole 12, and the locking member 8 such as the above-described enlarged bolt is engaged. Can be inserted. By inserting the locking member 8 shown in FIG. 7, it is possible to fix the distal end portion housing member 15 so as not to protrude. When the above-described enlarged bolt is used as the locking member 8 shown in FIG. 7, it is fastened to the hole 23 by rotating the rotating part 14 shown in FIG. 7, and the tip end housing member 15 is drawn into the housing member 21. It can be fixed by increasing the tension. Further, the gap between the enlarged bolt and the through hole 12 shown in FIG. 7 can be filled with grout as described above to fill the gap.
[0071]
Although the present invention has been described in detail with reference to the embodiments shown in the drawings, the materials, various dimensions, shapes, and the like used for the joint for a segment of the present invention may be any known conventionally. It can be used as long as the effects of the present invention are exhibited. Further, the joint structure of the present invention has been described with the embodiment applied to the segment joint for connecting the adjacent segments of the tunnel constructed by the shield method, but the joint structure of the present invention is In addition to the joint for the shield method, the present invention can be widely applied to construction work in which it is required to quickly and reliably connect adjacent members in the field of construction and civil engineering.
[0072]
【The invention's effect】
As described above, according to the present invention, a joint structure that can be reliably and easily connected by being slid and fitted and fastened, and that the joint structure is easily connected between segment rings in a tunnel circumferential direction. Thus, it is possible to provide a segment joint, a segment using the segment joint, and a shield tunnel which significantly improve workability.
[0073]
Further, according to the present invention, although a part of the locking member appears on the inner peripheral side of the segment, since the area is small, it is possible to finish the inner surface of the segment or the inner surface of the constructed shield tunnel substantially smoothly. Become. Since the locking member is provided on the inner peripheral side of the segment, the construction is easy. When using the above-described enlarged bolt for the locking member, since the rotating portion of the bolt is disposed on the inner peripheral side of the segment, it can be easily fastened without requiring a special tool such as a special wrench, and Can be retightened.
[0074]
The segment joint according to the present invention can be arranged on the outer peripheral side of the segment, and can provide a segment that is durable against bending tensile stress outside the segment. Further, even when the segment joint is applied to a concrete segment, cracks and the like generated at the joint portion can be reduced because the structure has a tension between the joints. Further, since the structure is such that tension is applied between the joints to connect the joints, the degree of freedom of the sealing material disposed between the joints or between the segments is increased.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a segment constructed by connecting segments in a circumferential direction according to the present invention.
FIG. 2 is a view showing a first embodiment of a segment joint according to the present invention.
FIG. 3 is a view exemplifying a projecting member of a male fitting and a part of a distal end accommodating member of a female fitting of the segment joint of the present invention.
FIG. 4 is a view exemplifying an accommodating member, a terminal portion and a locking member of the segment joint of the present invention of the segment joint of the present invention.
FIG. 5 is a view showing a second embodiment of the joint for a segment of the present invention.
FIG. 6 is an enlarged view showing a state where the joint is connected using the segment joint shown in FIG. 5;
FIG. 7 is a diagram showing a third embodiment of the segment joint according to the present invention.
FIG. 8 is a view showing the connection between the segment having the male fitting and the segment having the female fitting shown in FIG. 5;
FIG. 9 is a view showing the connection between the segment having the male fitting and the segment having the female fitting shown in FIG. 7;
[Explanation of symbols]
1, 1a, 1b ... segment
1c ... Tapered part
2… Segment ring
3a, 3b ... end of segment
4: Male bracket
5 ... female bracket
6 Projecting member
6a: Tip
6b… Roots
6c ... terminal part
7 ... accommodation member
7a: First accommodation section
7b: second storage section
7c ... communication part
8. Locking member
9 ... hole
10 ... Through hole
10a ... opening
11 ... Diameter
12 ... Through-hole
13 ... Shaft
14 ... Rotating part
15 ... tip end storage member
16 Front part
17 Front opening
18 ... side opening
19 ... Mating part
20a, 20b ... anchor
21, 22 ... accommodation member
21a... First accommodation unit
21b: second storage section
21c ... communication part
23 ... hole
24, 24a, 24b ... terminal part
25 ... Tapered part

Claims

A joint structure, the joint structure includes a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
The joint structure, wherein the distal end housing member houses the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project.

The locking member includes an enlarged diameter portion whose diameter is increased from a front end toward a distal end, the hole is a hole that fits the enlarged diameter portion, and the projecting member includes the enlarged diameter portion. The joint structure according to claim 1, wherein the tension increases as the hole is inserted into the hole.

The joint structure according to claim 1, wherein the distal end portion and the fitting portion are tapered.

A joint structure, the joint structure includes a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
The joint structure, wherein the distal end housing member houses the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project.

A joint for a segment for connecting a segment constructing a shield tunnel in a circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
A segment joint for accommodating the distal end portion, accommodating the distal end portion, being accommodated in the accommodating member, and being locked by the locking member such that the projecting member accommodated in the accommodating member does not project.

The locking member includes an enlarged diameter portion whose diameter is increased from a front end toward a distal end, the hole is a hole that fits the enlarged diameter portion, and the projecting member includes the enlarged diameter portion. The segment joint according to claim 5, wherein the tension increases as the hole is inserted into the hole.

The segment joint according to claim 5, wherein the distal end portion and the fitting portion are tapered.

The joint for a segment according to any one of claims 5 to 7, wherein the distal end housing member and the housing member include an anchor for fixing to the segment.

A joint for a segment for connecting a segment constructing a shield tunnel in a circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
A segment joint for accommodating the distal end portion, accommodating the distal end portion, being accommodated in the accommodating member, and being locked by the locking member such that the projecting member accommodated in the accommodating member does not project.

A segment including a segment joint for connecting adjacent segments in a circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
The segment in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project.

The locking member includes an enlarged diameter portion whose diameter is increased from a front end toward a distal end, the hole is a hole that fits the enlarged diameter portion, and the projecting member includes the enlarged diameter portion. 11. The segment of claim 10, wherein the tension increases as the hole is inserted.

The segment according to claim 10, wherein the distal end portion and the fitting portion are tapered.

The segment according to any one of claims 10 to 12, wherein the distal end housing member and the housing member include an anchor for fixing to the segment.

The segment is provided with a through hole penetrating toward the through hole, the locking member is inserted into the through hole, and the projection member is locked by the locking member. 14. Segment according to any of claims 10 to 13, characterized in that it is filled with grout.

A segment including a segment joint for connecting adjacent segments in a circumferential direction of the tunnel, the joint including a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
The segment in which the distal end portion accommodating member accommodates the distal end portion, is accommodated in the accommodating member, and is locked by the locking member such that the projecting member accommodated in the accommodating member does not project.

A shield tunnel constructed by connecting segments in the circumferential direction, wherein the segments adjacent to each other in the tunnel circumferential direction are connected by a male fitting and a female fitting,
The male fitting includes a protruding member including an expanded distal end portion, a root portion continuous with the distal end portion, and having a hole, a protruding member capable of protruding and receiving the protruding member, and a housing provided with a through hole. A member, comprising a locking member that can be inserted and installed so as to straddle the through hole and the hole,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, And a fitting portion that can be housed so as to fit the tip portion.
The shield tunnel, wherein the distal end portion housing member houses the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project.

The locking member includes an enlarged diameter portion whose diameter is increased from a front end toward a distal end, the hole is a hole that fits the enlarged diameter portion, and the projecting member includes the enlarged diameter portion. 17. The shield tunnel according to claim 16, wherein the tension increases as the hole is inserted into the hole.

The said front-end | tip part and the said fitting part are tapered, The shield tunnel of Claim 16 or 17 characterized by the above-mentioned.

19. The shield tunnel according to any one of claims 16 to 18, wherein the distal end housing member and the housing member include an anchor for fixing to the segment.

The segment is provided with a through hole penetrating toward the through hole, the locking member is inserted into the through hole, and the projection member is locked by the locking member. The shield tunnel according to any one of claims 16 to 19, wherein the shield tunnel is filled with grout.

A shield tunnel constructed by connecting segments in the circumferential direction, wherein the segments adjacent to each other in the tunnel circumferential direction are connected by a male fitting and a female fitting ,
The male fitting includes a protruding member including an expanded distal end and a root continuous with the distal end,
The female fitting is connected to the front opening, through which the root portion can be inserted, and to the front opening, and to the side opening, through which the distal end can be inserted, to the front opening, and to the side opening, A tip portion accommodating member including a fitting portion capable of being accommodated so as to insert the tip portion, and a terminal portion provided with a hole; and a through hole provided so as to protrude and accommodate the tip portion accommodating member. And a locking member that can be inserted so as to straddle the through hole and the hole,
The shield tunnel, wherein the distal end portion housing member houses the distal end portion, is housed in the housing member, and is locked by the locking member so that the projecting member housed in the housing member does not project.