JP3797829B2

JP3797829B2 - Tunnel segment connection parts and connection metal fittings

Info

Publication number: JP3797829B2
Application number: JP27442099A
Authority: JP
Inventors: 勝彦向野; 勉今野; 敏行青木; 和則辻本
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 1999-09-28
Filing date: 1999-09-28
Publication date: 2006-07-19
Anticipated expiration: 2019-09-28
Also published as: JP2001098894A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数のトンネル用セグメント本体を、連結具を用いてトンネル周方向に引付け連結してトンネル壁を構築すべく、既に構築した第１セグメント本体に対して第２セグメント本体をトンネルの長手方向に沿って切羽側から坑口側に押込んで連結するために、前記第１・第２セグメント本体の夫々が、互いに連結するための突合せ部をトンネル周方向に沿った端部に備え、夫々の前記突合せ部における前記坑口側の端部に坑口側アリ溝部を形成すると共に、夫々の前記突合せ部における前記切羽側の端部に切羽側アリ溝部を形成し、前記第１セグメント本体の前記坑口側アリ溝部に坑口側連結具を備えると共に、前記第２セグメント本体の前記切羽側アリ溝部にも切羽側連結具を備え、切羽側から坑口側への前記第２セグメント本体の押込み操作によって、前記第１・第２セグメント本体を連結するトンネル用セグメントの連結部及び連結金具に関する。
【０００２】
【従来の技術】
従来、この種のトンネル用セグメントの連結部及び連結金具に関する技術としては、図１９（イ），（ロ）に示すように、第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２に対して切羽側連結具Ｒ２を前記第２セグメント本体Ｆ２の突合せ部４からトンネル周方向Ｘ側へ突出するように設け、シールドジャッキＪによる第１、第２セグメント本体Ｆ１，Ｆ２の継手部１１に対する切羽側から坑口側への押し込み操作によって、前記切羽側連結具Ｒ２の切羽側端部に設けた、トンネルセグメント本体同士を引き付け連結する際に一定の締付力を付与するためのバックアップ材Ｔと、前記第２セグメント本体Ｆ２とを同時に押し込んで前記第１，第２セグメント本体Ｆ１，Ｆ２同士を引き付け連結していた。
【０００３】
【発明が解決しようとする課題】
上述した従来のトンネル用セグメントの連結部及び連結金具によれば、図１９（イ），（ロ）に示すように、第２セグメント本体Ｆ２と共に、前記切羽側連結具Ｒ２の切羽側端部に設けたバックアップ材ＴとをシールドジャッキＪに接当させて、前記シールドジャッキによる切羽側から坑口側への押し込み操作によって前記第１，第２セグメント本体Ｆ１，Ｆ２同士を引き付け連結していたが、図２０（イ），（ロ）に示すように、前記シールドジャッキＪが、継手部１１から外れて前記切羽側連結具Ｒ２の切羽側端部に設けたバックアップ材Ｔに接当せずに第２セグメント本体Ｆ２だけを押し込むようになった場合、バックアップ材Ｔの変形反力をとることができず、一定の締付力を付与することができなかった。また、場合によっては連結具がセグメント本体Ｆから抜け出す可能性もあった。
そこで、継手部１１からシールドジャッキＪの位置が外れた場合でも、第２セグメント本体Ｆ２と同時に切羽側端部に設けたバックアップ材Ｔを押し込むために、図２１（イ）に示すようにシールドジャッキＪに拡大スプレッダ２０を設けたり、さらに、図２１（ロ）に示すように、拡大スプレッダ２０でもカバーできない部分についてはプレート２１を追加するか、又は、継手部１１にシールドジャッキＪが確実にくるように、セグメント本体の分割位置の変更又は、シールドジャッキＪの改造が必要となり、拡大スプレッダ２０及びプレート２１の着脱に手間がかかって、トンネルの建設作業性が低下するという問題と、トンネル建設費のコストアップに繋がり易いといった問題があった。
【０００４】
従って、本発明の目的は、上記問題点を解消し、継手部からシールドジャッキの押し込み位置が外れた場合でも、手間をかけることなくバックアップ材を押し込んで、セグメント本体同士の連結に一定の締付力を付与でき、トンネルの建設作業性の低下、及びトンネルの建設費のコストアップを防止できるトンネル用セグメントの連結部及び連結金具を提供するところにある。
【０００５】
【課題を解決するための手段】
〔構成〕
請求項１の発明の特徴構成は図６〜８に例示するごとく、複数のトンネル用セグメント本体を、連結具Ｒを用いてトンネル周方向Ｘに引付け連結してトンネル壁を構築すべく、既に構築した第１セグメント本体Ｆ１に対して第２セグメント本体Ｆ２をトンネルの長手方向Ｙに沿って切羽側から坑口側に押込んで連結するために、前記第１・第２セグメント本体Ｆ１，Ｆ２の夫々が、互いに連結するための突合せ部４をトンネル周方向Ｘに沿った端部に備え、夫々の前記突合せ部４における前記坑口側の端部７に坑口側アリ溝部Ｍ１を形成すると共に、夫々の前記突合せ部４における前記切羽側の端部８に切羽側アリ溝部Ｍ２を形成し、前記第１、第２セグメント本体を突き合わせた状態で対抗する両アリ溝部に沿って各別に嵌入自在な一対の拡大縁部を一体に備え、前記拡大縁部に対する夫々の前記アリ溝部の接当面を、前記拡大縁部を前記アリ溝部に沿って嵌入させるに伴って前記両突合せ部が相対的に近接するテーパー面状に形成した連結具を形成し、前記第１セグメント本体Ｆ１の前記坑口側アリ溝部Ｍ１に坑口側連結具Ｒ１を備えると共に、前記第２セグメント本体Ｆ２の前記切羽側アリ溝部Ｍ２にも切羽側連結具Ｒ２を備え、切羽側から坑口側への前記第２セグメント本体Ｆ２の押込み操作によって、前記第１・第２セグメント本体Ｆ１，Ｆ２を連結するトンネル用セグメントの連結部であって、前記第２セグメント本体Ｆ２の押込み操作によって前記連結具Ｒに生じる反力を受ける反力受け部９を、前記第１・第２セグメント本体Ｆ１，Ｆ２に設けた前記アリ溝部Ｍの内、少なくとも前記第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２に設けると共に、その切羽側アリ溝部Ｍ２に前記連結具Ｒを挿入するための開口１０を前記第２セグメント本体Ｆ２の突合せ部４に設けてあり、前記坑口側連結具Ｒ１と切羽側連結具Ｒ２における一対の拡大縁部は、押込み方向の一方に向かって先細り形状に形成され、前記第１セグメント本体Ｆ１側の坑口側連結具Ｒ１は、その先細り側を切羽側に向けて、前記第２セグメント本体Ｆ２側の切羽側連結具Ｒ２は、その先細り側を坑口側に向けて配置され、前記坑口側連結具Ｒ１と切羽側連結具Ｒ２は、その一対の拡大縁部の一方にバックアップ材Ｔを備え、前記坑口側連結具Ｒ１は、前記バックアップ材Ｔを備えた拡大縁部を第１セグメント本体Ｆ１の坑口側アリ溝部Ｍ１に嵌入し、前記バックアップ材Ｔを既設トンネルリングに当接するように配置され、前記切羽側連結具Ｒ２は、前記バックアップ材Ｔを備えた拡大縁部を第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２に嵌入し、前記バックアップ材Ｔを前記反力受け部９に当接するように配置されているところにある。
【０００６】
請求項２の発明の特徴構成は図１１に例示するごとく、複数のトンネル用セグメント本体を、連結具Ｒを用いてトンネル周方向Ｘに引付け連結してトンネル壁を構築すべく、既に構築した第１セグメント本体Ｆ１に対して第２セグメント本体Ｆ２をトンネルの長手方向Ｙに沿って切羽側から坑口側に押込んで連結するために、前記第１・第２セグメント本体Ｆ１，Ｆ２の夫々が、互いに連結するための突合せ部４をトンネル周方向Ｘに沿った端部に備え、夫々の前記突合せ部４における前記坑口側の端部７に坑口側アリ溝部Ｍ１を形成すると共に、夫々の前記突合せ部４における前記切羽側の端部８に切羽側アリ溝部Ｍ２を形成し、前記第１、第２セグメント本体を突き合わせた状態で対抗する両アリ溝部に沿って各別に嵌入自在な一対の拡大縁部を一体に備え、前記拡大縁部に対する夫々の前記アリ溝部の接当面を、前記拡大縁部を前記アリ溝部に沿って嵌入させるに伴って前記両突合せ部が相対的に近接するテーパー面状に形成した連結具を形成し、前記第１セグメント本体Ｆ１の前記坑口側アリ溝部Ｍ１に坑口側連結具Ｒ１を備えると共に、前記第２セグメント本体Ｆ２の前記切羽側アリ溝部Ｍ２にも切羽側連結具Ｒ２を備え、切羽側から坑口側への前記第２セグメント本体Ｆ２の押込み操作によって、前記第１・第２セグメント本体Ｆ１，Ｆ２を連結するトンネル用セグメントの連結部であって、前記第２セグメント本体Ｆ２の押込み操作によって前記連結具Ｒに生じる反力を受ける反力受け部９を、前記第１・第２セグメント本体Ｆ１，Ｆ２に設けた前記アリ溝部Ｍの内、少なくとも前記第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２に設けると共に、前記反力受け部９を、前記第２セグメント本体Ｆ２に対して着脱自在に構成してあるところにある。
【０００７】
請求項３の発明の特徴構成は図２，６に例示するごとく、前記アリ溝部Ｍ内に前記連結具Ｒを備えたときに、前記連結具Ｒと前記アリ溝部Ｍとの間に形成される隙間Ｓを埋めて前記連結具Ｒの姿勢が変更するのを規制する規制部材６を設けてあるところにある。
【０００８】
請求項４の発明の特徴構成は図３に例示するごとく、周方向Ｘに隣合う隣接セグメント本体との突合せ部４に前記隣接セグメント本体と接合するためのアリ溝部Ｍを複数設け、トンネル長手方向Ｙに沿う方向で前記アリ溝部Ｍに嵌合自在な一対の拡大縁部１を一体に備えたセグメント連結用の連結具Ｒの前記拡大縁部１、及びその拡大縁部１に対する前記アリ溝部Ｍの接当面を、前記拡大縁部１を前記アリ溝部Ｍに沿って嵌入させるに伴って前記アリ溝部Ｍを前記隣接セグメント本体側に近接させるテーパー面状に形成してあるトンネル用セグメントであって、前記セグメント本体に設けた前記複数のアリ溝部Ｍのうち、選択された任意の箇所に予め前記連結具Ｒを挿入し、前記予め挿入された連結具Ｒのうち、隣接セグメント本体に対する前記セグメント本体の押し込み操作によって、前記隣接セグメント本体のアリ溝部Ｍに嵌入される連結具Ｒを予め挿入配置してあるセグメント本体のアリ溝部Ｍに、前記セグメント本体の押し込み連結の際に前記連結具Ｒに生じる反力を受ける反力受け部９を設けると共に、その反力受け部９を設けたアリ溝部Ｍに前記連結具Ｒを挿入するための開口１０をそのセグメント本体の突合せ部４に設けてあり、前記反力受け部９が、前記セグメント本体の外形面から突出しない状態で設けられているところにある。
【０００９】
請求項５の発明の特徴構成は図１３〜１５に例示するごとく、前記アリ溝部Ｍが、セグメント本体Ｆに埋設するアンカー部１３と、前記連結具Ｒに生じる反力を受ける反力受け部９と、前記連結具Ｒの押込みによりセグメント本体Ｆ同士を引付けるアリ溝とを設けた連結用金具１５によって形成されているところにある。
【００１０】
尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。
【００１１】
〔作用及び効果〕
請求項１の発明により、前記第２セグメント本体の押込み操作によって前記連結具に生じる反力を受ける反力受け部を、前記第１・第２セグメント本体に設けた前記アリ溝部の内、少なくとも前記第２セグメント本体の切羽側アリ溝部に設けると共に、その切羽側アリ溝部に前記連結具を挿入するための開口を前記第２セグメント本体の突合せ部に設けてあるから、前記開口から連結具を挿入することができると共に、シールドジャッキの接当位置にかかわらず、反力受け部を介して連結具を押し込んでセグメント本体同士を引き付け連結することができる。
つまり、セグメント本体同士の継手部にシールドジャッキの接当位置が位置しないで、連結具を直接シールドジャッキに接当させて押し込むことができなくても、第２セグメント本体の押し込み操作により切羽側アリ溝部に設けた反力受け部に前記切羽側連結具が接当し、前記第２セグメント本体に対する押し込み力が前記反力受け部によって前記連結具に伝達されてアリ溝部内における坑口側への押し込み力として作用し、セグメント本体同士を引き付け連結することができる。
その結果、継手部からシールドジャッキの接当位置が外れていても、手間をかけることなく迅速に連結具を押し込んで、セグメント本体同士の引き付け連結が行えるようになった。
また、このときに、切羽側アリ溝部内の反力受け部側に位置する連結具の切羽側端部にバックアップ材を設けてあれば、トンネルセグメント本体同士を引き付け連結する際に一定の締付力を付与することができる。
そして、このような作用効果を叶えることができるのに加えて、坑口側連結具と切羽側連結具における一対の拡大縁部が、押込み方向の一方に向かって先細り形状に形成され、第１セグメント本体側の坑口側連結具は、その先細り側を切羽側に向けて、第２セグメント本体側の切羽側連結具は、その先細り側を坑口側に向けて配置されているので、第２セグメント本体を切羽側から坑口側へ押込む際、最初に第２セグメント本体の突合せ部を第１セグメント本体の突合せ部に接触させ、その接触させた状態のままで第２セグメント本体を押込み操作することができるので、第１セグメント本体の突合せ部をガイド部材として第２セグメント本体の押込み操作を円滑、確実に行うことができると共に、トンネルリングを完成させるために最後に押込み操作するセグメント本体についても、支障なく円滑に押込んでトンネルリングを完成させることができる。
さらに、坑口側連結具と切羽側連結具が、その一対の拡大縁部の一方にバックアップ材を備え、坑口側連結具は、バックアップ材を備えた拡大縁部を第１セグメント本体の坑口側アリ溝部に嵌入し、バックアップ材を既設トンネルリングに当接するように配置され、切羽側連結具は、バックアップ材を備えた拡大縁部を第２セグメント本体の切羽側アリ溝部に嵌入し、バックアップ材を反力受け部に当接するように配置されているので、上述したように第２セグメント本体を押込み操作するだけで、第１セグメント本体と第２セグメント本体の坑口側と切羽側において、ほぼ一定の締付力で締め付けて両セグメント本体を確実に連結することができる。
【００１２】
請求項２の発明によれば、請求項１の発明と同様に、前記第２セグメント本体の押込み操作によって前記連結具に生じる反力を受ける反力受け部を、前記第１・第２セグメント本体に設けた前記アリ溝部の内、少なくとも前記第２セグメント本体の切羽側アリ溝部に設けてあるから、シールドジャッキの接当位置にかかわらず、反力受け部を介して連結具を押し込んでセグメント本体同士を引き付け連結することができる。
そして、このような作用効果を叶えることができるのに加えて、前記反力受け部を、前記第２セグメント本体に対して着脱自在に構成してあるから、トンネル周方向に隣接するセグメント本体夫々の突合せ部を突き合わせた後でも、連結具を切羽側から挿入することができる。
つまり、反力受け部を切羽側に設けてセグメント本体に対する押し込み力を前記連結具に伝達していたので、例えば、反力受け部がセグメント本体に固定されているものだとセグメント本体の切羽側端部に連結具挿入のための開口を設けることができないので、トンネル周方向に隣接するセグメント本体夫々の突合せ部を突き合わせる作業よりも前に、突合せ部に形成した連結具挿入用の開口から予め連結具をアリ溝部内に挿入しておく必要があり、第２セグメント本体のトンネル周方向に連結具の一端部を突出させた状態のまま、セグメント本体同士の突合せ部を突合せてから第２セグメント本体を押し込み操作する必要があるが、前記セグメント本体同士の突合せ作業の際に、第２セグメント本体の位置ずれを生じ、前記突出した連結具の一端部が第１セグメント本体に接当して破損したり、前記接当により第２セグメント本体が、その送り込み方向に傾きを生じて押し込み作業ができなくなる恐れがある。ところが、本件だとセグメント本体同士の突合せ部を突き合わせた後に連結具を挿入することができるので、セグメント本体同士の突合せ部の突合せ作業の際に、連結具が第１セグメントに接当して破損したり、第２セグメント本体の押し込み作業ができなくなる恐れはなくなる。
その結果、セグメント本体同士の連結作業において、連結具の破損、及び第２セグメント本体の押し込み作業に支障をきたすことがなくなるので、セグメント本体同士の連結作業の作業性を向上させることができるようになった。
【００１３】
請求項３の発明によれば、請求項１又は２の発明による作用効果を叶えることができるのに加えて、前記アリ溝部内に前記連結具を備えたときに、前記連結具と前記アリ溝部との間に形成される隙間を埋めて前記連結具の姿勢が変更するのを規制する規制部材を設けてあるから、セグメント本体同士の連結作業の際に連結具が転倒することなくスムーズにアリ溝部に挿入されるようになる。
つまり、アリ溝部内に連結具を備えたときに、連結具とアリ溝部の間に形成される隙間によって連結具の動きが許容されるので、第２セグメント本体の押し込み操作時にセグメント本体のアリ溝部に嵌入する連結具が、セグメント本体との接触で転倒し易くなり、セグメント本体の押し込みが出来なくなる恐れを生じるが、本件だと、規制部材によって連結具がセグメント本体と接触しても転倒するのを防止できるので、アリ溝部内にスムーズに連結具を嵌入させることができ、セグメント本体の押し込み作業に支障をきたすことがなくなる。
その結果、セグメント本体同士の連結作業の作業性を向上させることができるようになった。
【００１４】
請求項４の発明によれば、前記セグメント本体に設けた前記複数のアリ溝部のうち、選択された任意の箇所に予め前記連結具を挿入し、前記予め挿入された連結具のうち、隣接セグメント本体に対する前記セグメント本体の押し込み操作によって、前記隣接セグメント本体のアリ溝部に嵌入される連結具を予め挿入配置してあるセグメント本体のアリ溝部に、前記セグメント本体の押し込み連結の際に前記連結具に生じる反力を受ける反力受け部を設けると共に、その反力受け部を設けたアリ溝部に前記連結具を挿入するための開口をそのセグメント本体の突合せ部に設けてあるから、前記開口から連結具を挿入することができると共に、シールドジャッキの接当位置にかかわらず、セグメント本体同士を引き付け連結することができる。
つまり、セグメント本体同士の継手部にシールドジャッキの接当位置が位置しなくても、前記隣接セグメント本体のアリ溝部に嵌入される連結具を予め挿入配置してあるセグメント本体アリ溝部に反力受け部を設け、前記セグメント本体の前記隣接セグメント本体への押し込み操作に伴って前記連結具が前記反力受け部に接当し、前記隣接セグメント本体に対する押し込み力が前記反力受け部によって前記連結具に伝達され、セグメント本体同士を引き付け連結する引き付け力として作用させることができる。
その結果、継手部からシールドジャッキの接当位置が外れていても、手間をかけることなく迅速に連結具を押し込んで、セグメント本体同士の引き付け連結を行うことができるトンネル用セグメントを提供できるようになった。
そして、このような作用効果を叶えることができるのに加えて、前記反力受け部が、セグメント本体の外形面から突出しない状態で設けられているので、セグメント本体の運搬時や取り扱い時において、反力受け部に他物が接当するおそれが少なく、したがって、他物の接当による反力受け部の損傷を防止することができる。
【００１５】
請求項５の発明によれば、請求項１〜３の発明による作用効果を叶えることができるのに加えて、前記アリ溝部が、セグメント本体に埋設するアンカー部と、前記連結具に生じる反力を受ける反力受け部と、前記連結具の押込みによりセグメント本体同士を引付けるアリ溝とを設けた連結用金具によって形成されているから、コンクリートセグメントにおいて、容易に反力受け部を備えたアリ溝連結部を形成することができる。
つまり、コンクリートセグメント本体の周方向における突合せ端部に前記連結用金具の突合せ面がくるようにして、前記連結用金具に設けたアンカー部をコンクリートセグメント本体内に埋め込むだけで前記突合せ端部に反力受け部を備えたアリ溝連結部を形成することができるので、
その結果、反力受け部を備えたアリ溝連結部を設けたコンクリートセグメント本体形成の作業性を向上させることができる。
【００１６】
【発明の実施の形態】
以下に本発明の実施の形態を図面に基づいて説明する。尚、図面において従来例と同一の符号で表示した部分は、同一又は相当の部分を示している。
【００１７】
本発明のトンネル用セグメントの連結具Ｒおよびトンネルリング形成用ユニットに係わる概要を図１および図２に示す。
本実施形態では、トンネル周方向Ｘに連続して環状に構築された既設トンネルリングＴＲに対してＡセグメント本体ａと、Ｂセグメント本体ｂと、Ｃセグメント本体ｃとを連結具Ｒを用いて順次取付け、新たなトンネルリングＴＲを構築する場合の例を示す。
ここで、前記Ａセグメント本体ａは、前記既設トンネルＴＲに対して最初に取付るセグメント本体である。つまり、新たなトンネルリングＴＲを構築する際にトンネル周方向Ｘにおいて最初に連結されるセグメント本体である。
前記Ｂセグメント本体ｂは、前記Ａセグメント本体ａを挟んでトンネル周方向Ｘに順次連結するセグメント本体であり、一つのトンネルリングＴＲを形成するセグメント本体のうち、前記Ａセグメント本体ａと後述するＣセグメント本体ｃとを除く全てのセグメント本体が当該Ｂセグメント本体ｂである。
前記Ｃセグメント本体ｃは、一つのトンネルリングＴＲを完成させるために最後に連結するセグメント本体である。つまり、前記Ｃセグメント本体ｃは、二つのＢセグメント本体ｂによって形成された隙間に押し込んで連結する。
尚、これらのセグメント本体は、例えば、ダクタイルセグメントの他に、コンクリートセグメント、スチールセグメント、ダクタイル＋コンクリートの合成セグメントなどの各種のセグメントで構成することができる。
【００１８】
前記Ａ・Ｂ・Ｃの各セグメント本体は、図２に示すような連結具Ｒを用いて互いに連結する。図３には、前記Ａ・Ｂ・Ｃの各セグメント本体を連結する際の態様を示す。
【００１９】
前記連結具Ｒは図２に示すように、略矩形状であって、当該連結具Ｒの押し込み方向Ｚに沿った両縁部に夫々拡大縁部１を有している。当該双方の拡大縁部１は平板状の胴部２で連接されている。また、夫々の拡大縁部１には実際にセグメント本体Ｆどうしを引きつけるためのテーパー面状の挟持部３を形成してある。これら挟持部３どうしの間隔は、当該連結具Ｒの押し込み方向Ｚに沿った押し込み方向Ｚの反対側ほど広く構成してあり、そのため、連結具Ｒにおける一対の拡大縁部１は、押し込み方向Ｚの一方に向かって先細り形状に形成されている。
図中６は、連結具Ｒを、アリ溝部Ｍ内に備えたときに前記連結具Ｒと前記アリ溝部Ｍとの間に形成される隙間Ｓにおいて、その隙間Ｓを埋めて前記連結具Ｒの姿勢が変更するのを規制する規制部材である。
【００２０】
一方、前記Ａ・Ｂ・Ｃの各セグメント本体の端部のうちトンネル周方向Ｘの両端部には、隣接するセグメント本体と連結するための突合せ部４を備えてある。そして、当該突合せ部４のうち、トンネル長手方向Ｙに沿った両端部には夫々アリ溝部Ｍを形成してある。当該アリ溝部Ｍには、アリ溝内に前記連結具Ｒの拡大縁部１を挿入したときに前記挟持部３が当接する被挟持部５を形成してある。
【００２１】
セグメント本体どうしの連結は以下のごとく行う。尚、ここでは、図３に示したうちの前記Ａセグメント本体ａと前記Ｂセグメント本体ｂとを連結する場合を例にとる。
図３は、前記Ａセグメント本体ａが既設のトンネルリングＴＲに連結された状態を示している。尚、図面中のトンネル長手方向Ｙを上下方向、トンネル周方向Ｘを左右方向と見なして説明する。図３においては、下方側がトンネルシールドの切羽側であり、上方側が坑口側である。トンネル掘削は図３の下方に向かって行われる。よって、ここで連結するＢセグメント本体ｂは、図３の上方に向かって押し込まれる。本実施形態では、当該Ｂセグメント本体ｂを押し込む方向を坑口側と称し、その反対側を切羽側と称する。
前記Ａセグメント本体ａの双方の突合せ部４には、合計四箇所にアリ溝部Ｍを形成してある。このうち、既設トンネルリングＴＲの側の二つを坑口側アリ溝部Ｍ１とし、他の残りの二つを切羽側アリ溝部Ｍ２とする。Ａセグメント本体ａは、双方の坑口側アリ溝部Ｍ１に坑口側連結具Ｒ１を挿入した状態で既設トンネルリングＴＲに取付てある。
一方、当該Ａセグメント本体ａに対して連結するＢセグメント本体ｂの双方の突合せ部４にも、夫々坑口側アリ溝部Ｍ１と切羽側アリ溝部Ｍ２とを形成してある。ただし、Ｂセグメント本体ｂにおいては、前記Ａセグメント本体ａに連結する突合せ部４の切羽側アリ溝部Ｍ２に切羽側連結具Ｒ２を備えるとともに、他方の突合せ部４の前記坑口側アリ溝部Ｍ１に坑口側連結具Ｒ１を備えている。
尚、図３に示すごとく、前記Ｃセグメント本体ｃでは、夫々の突合せ部４において何れも前記切羽側アリ溝部Ｍ２に切羽側連結具Ｒ２を備えてある。
【００２２】
前記Ｂセグメント本体ｂを押し込む際には、前記Ａセグメント本体ａの坑口側アリ溝部Ｍ１に設けた坑口側連結具Ｒ１に対してＢセグメント本体ｂの坑口側アリ溝部Ｍ１を嵌合し、同時に、前記Ａセグメント本体ａの前記切羽側アリ溝部Ｍ２に対して、前記Ｂセグメント本体ｂの切羽側アリ溝部Ｍ２に設けた切羽側連結具Ｒ２を挿入する。この状態でＢセグメント本体ｂをさらに押し込むと、夫々の連結具Ｒ１，Ｒ２によって、Ａセグメント本体ａとＢセグメント本体ｂとが引き付けられ、連結される。
この場合に、坑口側連結具Ｒ１は前記既設トンネルリングＴＲに接当して押込み力を得ることができ、一方の切羽側連結具Ｒ２は、例えばトンネルシールドのジャッキＪ等の押込手段によって押込み力を得る。
【００２３】
本発明に係る連結具Ｒは、バックアップ材Ｔを備えている。バックアップ材Ｔは、双方の拡大縁部１のうち一方の端部に設けてあり、その突出方向は当該連結具Ｒの押込み方向Ｚと略平行に設定してある。このように一方の拡大縁部１にのみバックアップ材Ｔを設けるのは、連結具Ｒを実質的に押し込むのは前記Ｂセグメント本体ｂの切羽側アリ溝部Ｍ２に形成の反力受け部９であると共に、坑口側アリ溝部Ｍ１であることに基づく。
当該バックアップ材Ｔの取付けは、図２に示すごとく前記拡大縁部１の後端に形成した凹部１２に嵌入固定するものであってもよいし、接着剤等を用いて接着固定するものであってもよい。尚、前記バックアップ材Ｔは双方の拡大縁部１の後端部に設けても構わない。
図２に示すごとく、前記バックアップ材Ｔは、例えば中空の円筒部材１６で構成する。前記バックアップ材Ｔは、例えば連結具Ｒ１の場合は既設のトンネルリングＴＲから所定の押圧力を受け、連結具Ｒ２の場合は反力受け部９から所定の押圧力を受けて図４に示すごとく面外変形する。つまり、連結具Ｒが押し込まれるとＡセグメント本体ａとＢセグメント本体ｂとが次第に引き付けられるから、これに伴って連結具Ｒを押し込むために必要な力が増加する。この間、前記バックアップ材Ｔは弾性変形する。しかし、締結力が所定の値に達した段階で前記バックアップ材Ｔには塑性変形が生じ始める。この状態では、連結具Ｒによる締結力はもはや上昇せず、Ａセグメント本体ａとＢセグメント本体ｂとを引き付ける力は一定に保持されるのである。
【００２４】
前記アリ溝部Ｍの溝の形状は、図９に示すように、連結具Ｒの挟持部３に対する被挟持部５以外の部分は、連結具Ｒに対して密着させる必要はないので隙間Ｓを設けて形成してある。これだと、被挟持部５以外は鋳ばなし状態で良くなるので被挟持部５の切削代が少なくなり切削作業の作業性が向上する。
【００２５】
前記アリ溝部Ｍのうち坑口側アリ溝部Ｍ１は、図８に示すように、トンネル長手方向Ｙに沿った坑口側端部７に開口しており、前記坑口側連結具Ｒ１は、バックアップ材Ｔを坑口側に向けて、そのバックアップ材Ｔを備えた拡大縁部１側を当該開口側から前記坑口側アリ溝部Ｍ１に挿入して、前記突合せ部４の中央部に向かって押し込むこととなる。
前記アリ溝部Ｍのうち切羽側アリ溝部Ｍ２は、セグメント本体Ｆのトンネル周方向Ｘに沿う左右でその形状は異なっており、図７，８に示すように、第１セグメント本体Ｆ１（既設セグメント本体）と、前記第１セグメント本体Ｆ１に対して後から連結する第２セグメント本体Ｆ２との突合せ部４に位置する切羽側アリ溝部Ｍ２のうち、第２セグメント本体Ｆ２側の切羽側アリ溝部Ｍ２は、前記第１セグメント本体Ｆ１との突合せ部４に切羽側連結具Ｒ２挿入用の開口１０を設けると共に、前記切羽側アリ溝部Ｍ２における切羽側端部８には、前記第２セグメント本体Ｆ２の押し込みによる押し込み力を前記バックアップ材Ｔを介して前記切羽側連結具Ｒ２に伝える反力受け部９を設けて形成してある。したがって、切羽側連結具Ｒ２は、バックアップ材Ｔを切羽側に向けて、そのバックアップ材Ｔを備えた拡大縁部１側を開口１０から前記切羽側アリ溝部Ｍ２に挿入して、反力受け部９に向かって押し込むこととなる。また、第１セグメント本体Ｆ１側の切羽側アリ溝部Ｍ２は、前記坑口側アリ溝部Ｍ１同様にトンネル長手方向Ｙに沿った切羽側端部８に開口しており、前記第２セグメント本体Ｆ２の切羽側溝部Ｍ２に備えた連結具Ｒ２が、前記第２セグメント本体Ｆ２の押し込み操作により当該開口側から前記第１セグメント本体Ｆ１の切羽側アリ溝部Ｍ２に挿入し、前記突合せ部４の中央側に向かって押し込むこととなる。
【００２６】
Ｂセグメント本体ｂを押し込む際の前記連結具Ｒの動作原理を以下に示す。
尚、連結する二つのセグメント本体の組み合わせは、Ａ−Ｂ、Ｂ−Ｂ、Ｂ−Ｃの三種類があり、夫々のセグメント本体において坑口側の連結具Ｒ１と切羽側の連結具Ｒ２とは各別に押し込まれるが、何れの連結具Ｒの動作原理は同じである。
つまり、坑口側の連結具Ｒ１は既設トンネルリングＴＲに当接し、切羽側の連結具Ｒ２は押込手段Ｊにより切羽側アリ溝部Ｍ２に形成の反力受け部９に当接するものである。
【００２７】
前記既設トンネルリングＴＲに取付た第１セグメント本体Ｆ１に対して前記連結具Ｒを用いて第２セグメント本体Ｆ２を連結する過程を切羽側アリ溝部Ｍ２について説明する。
図６に示すごとく、第２セグメント本体Ｆ２のうち、第１セグメント本体Ｆ１側に位置する突合せ部４に形成した切羽側連結具Ｒ２挿入用の開口１０から、切羽側連結具Ｒ２の双方の挟持部３のうちバックアップ材Ｔを備えた側の挟持部３を挿入し、図７に示すように、前記バックアップ材Ｔを設けていない側の挟持部３は露出させたまま切羽側アリ溝部Ｍ２内の切羽側へ移動させる。このとき、前記連結具Ｒ２に一体形成してあるゴム材で形成された規制部材６が、前記切羽側連結具Ｒ２と前記切羽側アリ溝部Ｍ２との間に形成される隙間Ｓを埋めて前記切羽側連結具Ｒ２の姿勢が変更するのを規制する。
そして、シールドジャッキＪによる第２セグメント本体Ｆ２の押し込み操作により露出させた前記切羽側連結具Ｒ２の挟持部３が、第１セグメント本体Ｆ１の切羽側アリ溝部Ｍ２に挿入し、前記シールドジャッキＪによる押し込み力を、前記第２セグメント本体Ｆ２に形成の反力受け部９から前記切羽側連結具Ｒ２に設けたバックアップ材Ｔを介して前記切羽側連結具Ｒ２に形成の挟持部３に伝え、前記第１，第２セグメント本体Ｆ１，Ｆ２に形成の切羽側アリ溝部Ｍ２内の夫々の被挟持部５との摺接で両セグメント本体Ｆ同士が引き付け連結される。このとき、バックアップ材Ｔは、図２に示すごとく中空の円筒部材１６で構成されており、図４に示すように所定の押し圧力を受けた前記バックアップ材Ｔが塑性変形しながら引き付け連結することによって、締結力を所定の値に保持することができるようになっている。
前記シールドジャッキＪは、セグメント本体Ｆ同士の継手部１１に位置させると共に、直接切羽側連結具Ｒ２に接当させる必要はなく、第２セグメント本体Ｆ２を押し込むだけでセグメント本体Ｆ同士の引き付け連結を行うことができる。
【００２８】
〔別実施形態〕
以下に他の実施形態を説明する。
〈１〉反力受け部９は先の実施形態で説明した切羽側アリ溝部Ｍ２内に形成したものに限るものではなく、例えば、図１０（イ），（ロ）に示すように、第２セグメント本体Ｆ２から第１セグメント本体Ｆ１側に延設した板壁によるものでも良い。
これだと、少なくとも当該側にバックアップ材Ｔを設けておけば、第２セグメント本体Ｆ２による押込み力の作用線上にバックアップ材Ｔが位置することとなるから、押込みに際して切羽側連結具Ｒ２が回転する等の不都合は生じない。
このとき、第１セグメント本体Ｆ１の切羽側アリ溝部Ｍ２の切羽側端部８を前記反力受け部９を形成する板壁分の凹部を形成する必要がある。
〈２〉反力受け具９は先の実施形態で説明した第２セグメント本体Ｆ２と一体に固定されたものに限るものではなく、例えば、図１１（イ），（ロ）に示すように、ねじ込み式のプラグ１９等により着脱自在に形成してあるものでも良い。つまり、第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２の切羽側端部８に雌ネジ部１７を形成し、前記プラグ１９に形成の雄ねじ部１８をねじ込んで装着することにより反力受け部を形成する。これだと、第１、第２セグメント本体同士の突合せ部４を突き合わせてからでも連結具Ｒを切羽側から第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２内に挿入することができる。さらに、連結具Ｒを挿入するための大きな開口部（図６の開口１０参照）は必要なく、アリ溝部Ｍ２を小型、軽量化できる。
〈３〉コンクリートセグメントに使用するアリ溝部Ｍは、例えば図１２に示すように、第１セグメント本体Ｆ１と第２セグメント本体Ｆ２との突合せ部４に埋設形成した連結用金具のうち、第１セグメント本体の切羽側アリ溝部Ｍ１と坑口側アリ溝部Ｍ２、及び第２セグメント本体Ｆ２の坑口側アリ溝部Ｍ２には、トンネル長手方向に沿った夫々の切羽側端部８又は坑口側端部７に連結具Ｒが嵌入するための開口を形成した連結用金具２２を使用し、第２セグメント本体Ｆ２の切羽側アリ溝部Ｍ２には、前記第１セグメント本体Ｆ１との突合せ部４に切羽側連結具Ｒ２挿入用の開口１０を設けると共に、前記切羽側アリ溝Ｍ２における切羽側端部８には、前記第２セグメント本体Ｆ２の押し込みによる押し込み力を前記バックアップ材Ｔを介して前記切羽側連結具Ｒ２に伝える反力受け部９を設けて形成した連結用金具２３を使用する構成のものでも良い。
〈４〉コンクリートセグメントに使用するアリ溝部Ｍは、例えば、図１３，１４，１５に示すように、セグメント本体Ｆに埋設するアンカー部１３と、前記連結具Ｒに生じる反力を受ける反力受け部９と、前記連結具Ｒの押込みによりセグメント本体同士を引付けるアリ溝部Ｍとを設けた連結用金具１５によって形成されているものでも良い。連結具Ｒ１及び連結具Ｒ２の前記連結用金具１５内への挿入操作は、前記連結金具１５に形成の開口１０より行われる。
〈５〉規制部材６の形状は先の実施形態で説明した形状のものに限るものではなく、例えば、図１６，１７に示すような突出部を形成したものでも良い。前記突出部は、連結具Ｒの押し込み方向Ｚにおける連結具Ｒの長さ全体にわたって設けてあっても良いし、その一部の長さでも良い。要するに、第１セグメント本体Ｆ１と第２セグメント本体Ｆ２との連結の際の抵抗で、前記連結具Ｒが転倒することのないようにその姿勢を規制できる形状であれば任意である。
また、図１８に示すように連結具Ｒ本体に設けるのではなく、アリ溝部Ｍ内に突出部を形成するものであっても良い。その材質もゴム材に限るものではなく、連結具Ｒの姿勢変更を規制できるものであるなら任意である。
【図面の簡単な説明】
【図１】本発明のトンネル用セグメントの連結部の概要を示す斜視図
【図２】本発明に係わる連結具を示す平面図
【図３】各種セグメント本体の連結態様を示す説明図
【図４】変形途中の突出部材を示す説明図
【図５】本発明に係わるセグメント本体の突合せ部を示す斜視図
【図６】本発明に係わる連結具の取付態様を示す部分断面図
【図７】本発明に係わるセグメント本体の連結過程の詳細を示す一部切り欠き断面図
【図８】本発明に係わるセグメント本体の連結態様を示す一部切り欠き断面図
【図９】本発明に係わる連結具による連結態様を示す部分拡大縦断正面図
【図１０】本発明に係わるセグメント本体の他の連結態様を示す説明図
【図１１】本発明に係わるセグメント本体の他の例の連結態様を示す説明図
【図１２】本発明に係わるセグメント本体の他の例の突合せ部を示す斜視図
【図１３】本発明に係わるセグメント本体の他の例の突合せ部を示す斜視図
【図１４】本発明に係わるセグメント本体の他の例の連結態様を示す横断平面図
【図１５】本発明に係わる連結具による他の例の連結態様を示す部分拡大縦断正面図
【図１６】本発明に係わる連結具の他の例を示す連結説明図
【図１７】本発明に係わる連結具の他の例を示す連結説明図
【図１８】本発明に係わる連結具の他の例を示す連結説明図
【図１９】従来例の連結態様を示す連結説明図
【図２０】従来例の連結態様を示す連結説明図
【図２１】従来例の連結態様を示す連結説明図
【符号の説明】
Ｒ連結具
Ｘトンネル周方向
Ｙトンネル長手方向
Ｆ１第１セグメント本体
Ｆ２第２セグメント本体
Ｍアリ溝部
Ｍ１坑口側アリ溝部
Ｍ２切羽側アリ溝部
Ｒ連結具
Ｒ１坑口側連結具
Ｒ２切羽側連結具
Ｓ隙間
Ｔバックアップ材
４突合せ部
６規制部材
７坑口側端部
８切羽側端部
９反力受け部
１０開口
１３アンカー部
１４アリ溝
１５連結用金具[0001]
BACKGROUND OF THE INVENTION
In the present invention, in order to construct a tunnel wall by attracting and connecting a plurality of tunnel segment main bodies in the circumferential direction of the tunnel using a connector, the second segment main body is connected to the already constructed first segment main body. Each of the first and second segment bodies is provided with an abutting portion for connecting to each other at an end portion along the circumferential direction of the tunnel in order to push and connect from the face side to the wellhead side along the longitudinal direction. And forming a well-portion-side dovetail groove at the well-end end portion of the butting portion, and forming a face-end dovetail groove portion at the face-side end portion of each of the butting portions. The side dovetail groove portion is provided with a wellhead side connector, the face segment side dovetail portion of the second segment body is also provided with a face edge side connector, and the second segment main body from the face side to the wellhead side is provided. The write operation, to connecting portion and the connecting fitting segment tunnel connecting the first and second segment body.
[0002]
[Prior art]
Conventionally, as a technique related to this type of tunnel segment connecting portion and connecting metal fitting, as shown in FIGS. 19 (a) and 19 (b), the face side connection to the face side dovetail portion M2 of the second segment body F2 is provided. A tool R2 is provided so as to protrude from the abutting portion 4 of the second segment main body F2 to the tunnel circumferential direction X side, and the first and second segment main bodies F1, F2 are connected to the joint portion 11 of the first and second segment main bodies F1, F2 from the face side to the wellhead side. The back-up material T provided at the face side end of the face side connector R2 to push the tunnel segment main body to each other by a pushing operation to apply a certain tightening force, and the second segment The main body F2 is pushed in at the same time, and the first and second segment main bodies F1 and F2 are attracted and connected to each other.
[0003]
[Problems to be solved by the invention]
According to the above-described conventional connecting portion and connecting bracket for a tunnel segment, as shown in FIGS. 19 (a) and 19 (b), together with the second segment body F2, the face side end of the face side connector R2 is provided. The backup material T provided was brought into contact with the shield jack J, and the first and second segment bodies F1, F2 were attracted and connected to each other by pushing operation from the face side to the wellhead side by the shield jack. As shown in FIGS. 20 (a) and 20 (b), the shield jack J is detached from the joint portion 11 and comes into contact with the backup material T provided at the face side end of the face side connector R2. When only the two-segment body F2 is pushed in, the deformation reaction force of the backup material T cannot be taken, and a constant tightening force cannot be applied. Moreover, depending on the case, there was a possibility that the connector would come out of the segment body F.
Therefore, even when the position of the shield jack J is deviated from the joint portion 11, in order to push in the backup material T provided at the face side end simultaneously with the second segment main body F2, as shown in FIG. An enlargement spreader 20 is provided at J, and as shown in FIG. 21 (b), a plate 21 is added to a portion that cannot be covered even by the enlargement spreader 20, or a shield jack J is securely attached to the joint portion 11. As described above, it is necessary to change the division position of the segment body or to remodel the shield jack J, and it takes time to attach and detach the expansion spreader 20 and the plate 21. There was a problem that it was easy to lead to cost increase.
[0004]
Therefore, the object of the present invention is to solve the above-mentioned problems, and even when the push-in position of the shield jack is removed from the joint portion, the backup material is pushed in without any trouble, and a fixed tightening is performed for the connection between the segment main bodies. It is an object of the present invention to provide a connecting part and a connecting metal part of a tunnel segment that can apply force, and can prevent a decrease in tunnel construction workability and an increase in the cost of tunnel construction.
[0005]
[Means for Solving the Problems]
〔Constitution〕
  In order to construct the tunnel wall by attracting and connecting a plurality of tunnel segment bodies in the circumferential direction X of the tunnel using the connector R, as shown in FIGS. Each of the first and second segment bodies F1, F2 is connected to the constructed first segment body F1 by pushing the second segment body F2 along the longitudinal direction Y of the tunnel from the face side to the wellhead side. Are provided with end portions along the circumferential direction X of the tunnels for connecting to each other, and at the end portion 7 on the well end side of each of the end portions 4, the well side dovetail groove portion M1 is formed. A pair of face dovetails M2 is formed on the face side end 8 of the butting part 4 and can be separately fitted along both dovetail parts facing each other in a state where the first and second segment bodies are faced. A taper in which both the butted portions are relatively close to each other when the enlarged edge portion is fitted along the dovetail portion, and the contact surface of each dovetail portion with respect to the enlarged edge portion is integrally provided with a large edge portion. A coupling tool formed in a planar shape is formed, and the well-end-side connector R1 is provided in the well-portion-side dovetail portion M1 of the first segment body F1, and the face-side dovetail portion M2 of the second segment body F2 is also cut. A tunnel segment connecting portion for connecting the first and second segment main bodies F1 and F2 by pushing the second segment main body F2 from the face side to the wellhead side. A reaction force receiving portion 9 that receives a reaction force generated in the connector R by the pushing operation of the second segment main body F2 is provided in the dovetail groove portion M provided in the first and second segment main bodies F1 and F2. And at least the face side dovetail groove portion M2 of the second segment main body F2, and the opening 10 for inserting the connector R into the face side dovetail groove portion M2 is provided in the butting portion 4 of the second segment main body F2. AhTheA pair of enlarged edges in the wellhead side connector R1 and the face side connector R2 are formed in a tapered shape toward one side in the pushing direction, and the wellhead side connector R1 on the first segment body F1 side is tapered. The face side connector R2 on the second segment body F2 side is arranged with the taper side facing the wellhead side with the side facing the face side.,The wellhead side connector R1 and the face side connector R2 include a backup material T on one of the pair of enlarged edges, and the wellhead side connector R1 includes a first enlarged edge provided with the backup material T. The segment main body F1 is inserted into the well-side dovetail groove M1 and arranged so that the backup material T comes into contact with the existing tunnel ring, and the face-side connector R2 has a second enlarged edge portion with the backup material T. The segment main body F2 is arranged so as to be fitted into the face-side dovetail groove portion M2 and to contact the backup material T with the reaction force receiving portion 9.
[0006]
  Claim2As illustrated in FIG. 11, the characteristic configuration of the present invention is a first segment that has already been constructed in order to construct a tunnel wall by attracting and coupling a plurality of tunnel segment bodies in the circumferential direction X of the tunnel using a connector R. The first and second segment bodies F1 and F2 are connected to each other in order to connect the second segment body F2 to the body F1 from the face side to the wellhead side along the longitudinal direction Y of the tunnel. For the end portion along the circumferential direction X of the tunnel, the well-side dovetail portion M1 is formed in the end portion 7 on the well-portion side of each of the abutment portions 4, and in each of the abutment portions 4 A face-side dovetail groove M2 is formed in the face-side end 8 and a pair of enlarged edges that can be inserted separately along both dovetail parts facing each other in a state where the first and second segment bodies are abutted with each other. The contact surface of each said dovetail groove part with respect to the said enlarged edge part is prepared in the body, and it forms in the taper surface shape in which the said butted parts relatively approach as the said enlarged edge part is fitted along the said dovetail groove part. The well-side connector R1 is provided in the well-portion-side dovetail groove M1 of the first segment body F1, and the face-side dovetail portion M2 of the second segment body F2 is also provided with the face-side connector R2 A tunnel segment connecting portion for connecting the first and second segment bodies F1 and F2 by pushing the second segment body F2 from the face side to the wellhead side, the second segment body Of the dovetail groove portions M provided in the first and second segment bodies F1 and F2, the reaction force receiving portion 9 that receives the reaction force generated in the connector R by the pushing operation of F2 is small. Also is provided on the working face side ant groove M2 of the second segment body F2, the reaction force receiving portion 9, there is to you have detachably attached to the second segment body F2.
[0007]
  Claim32 and 6, when the connecting tool R is provided in the dovetail groove part M, a gap S formed between the connecting tool R and the dovetail groove part M is illustrated. There is a restriction member 6 that is buried and restricts the posture of the connector R from being changed.
[0008]
  Claim4As shown in FIG. 3, the characteristic configuration of the present invention is provided with a plurality of dovetail groove portions M for joining to the adjacent segment main body in the abutting portion 4 with the adjacent segment main body adjacent in the circumferential direction X, along the tunnel longitudinal direction Y. The enlarged edge portion 1 of the connecting tool R for connecting segments, which is integrally provided with a pair of enlarged edge portions 1 that can be fitted in the dovetail groove portion M in a direction, and the contact surface of the dovetail groove portion M with respect to the enlarged edge portion 1 A segment for a tunnel which is formed in a tapered surface shape that causes the dovetail groove portion M to be close to the adjacent segment body side as the enlarged edge portion 1 is fitted along the dovetail groove portion M. Of the plurality of dovetail grooves M provided in the main body, the connecting tool R is inserted in advance at any selected location, and the segment for the adjacent segment main body of the connecting tool R inserted in advance. When the segment main body is pushed and connected, the connecting tool R is inserted into the dovetail groove M of the segment body into which the connecting tool R to be inserted into the dovetail groove M of the adjacent segment main body is inserted in advance. A reaction force receiving portion 9 for receiving a reaction force generated in the segment, and an opening 10 for inserting the connector R into the dovetail groove portion M provided with the reaction force receiving portion 9 is provided in the butt portion 4 of the segment body. AhTheThe reaction force receiving portion 9 is provided so as not to protrude from the outer surface of the segment body.
[0009]
  Claim513 to 15, the dovetail groove portion M includes an anchor portion 13 embedded in the segment body F, a reaction force receiving portion 9 that receives a reaction force generated in the connector R, and It exists in the place formed by the metal fitting 15 for a connection provided with the dovetail groove | channel which pulls the segment main bodies F by pushing of the connection tool R. FIG.
[0010]
In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.
[0011]
[Action and effect]
  According to the first aspect of the present invention, at least the dovetail groove portion provided in the first and second segment bodies has a reaction force receiving portion that receives a reaction force generated in the coupling tool by the pushing operation of the second segment body. Since it is provided in the face-side dovetail part of the second segment body, and an opening for inserting the connector in the face-side dovetail part is provided in the butting part of the second segment body, the connector is inserted from the opening. In addition, the segment main bodies can be attracted to each other by being pushed in via the reaction force receiving portion regardless of the contact position of the shield jack.
  In other words, even if the contact position of the shield jack is not located at the joint portion between the segment main bodies, and the connecting tool cannot be pushed directly into contact with the shield jack, it is possible to press the second segment main body to push the face side ant. The face side connector is brought into contact with the reaction force receiving portion provided in the groove portion, and the pushing force to the second segment body is transmitted to the connector by the reaction force receiving portion and pushed into the wellhead side in the dovetail portion. Acting as a force, the segment bodies can be attracted and connected.
  As a result, even if the contact position of the shield jack is removed from the joint portion, the connecting body can be quickly pushed in without any trouble, and the segment bodies can be attracted and connected.
  At this time, if a back-up material is provided at the face side end of the coupler located on the reaction force receiving part side in the face side dovetail part, a certain amount of tightening is performed when the tunnel segment bodies are attracted and connected to each other. Power can be granted.
  And like thisIn addition to being able to achieve the effect, a pair of enlarged edges in the wellhead side connector and the face side connector are formed in a tapered shape toward one side in the pushing direction, and the wellhead side on the first segment body side Since the connector is arranged with its tapered side facing the face side, and the face side connector on the second segment body side is arranged with its taper side facing the wellhead side, the second segment body is arranged from the face side to the wellhead. When the first segment body is pushed in, the abutting portion of the second segment main body is first brought into contact with the abutting portion of the first segment main body, and the second segment main body can be pushed in while being in contact therewith. The segment segment can be pushed last to complete the tunnel ring while the second segment body can be pushed in smoothly and reliably using the abutment part of the segment body as a guide member. For even cement body, it is possible to complete the tunnel ring with you smoothly pushed without any trouble.
  further,The wellhead side connector and the face side connector have a backup material on one of the pair of enlarged edges, and the wellhead side connector has an enlarged edge provided with the backup material in the wellhead side dovetail portion of the first segment body. Inserted and arranged so that the backup material comes into contact with the existing tunnel ring. The face side connector is inserted into the face side dovetail portion of the second segment body with the enlarged edge portion provided with the backup material, and the backup material is reacted. Since it is arranged so as to contact the receiving portion, as described above, the first segment body and the second segment body can be tightened substantially uniformly on the wellhead side and the face side by simply pushing the second segment body. Both segment bodies can be securely connected by tightening with force.
[0012]
  Claim2According to the invention, as in the invention of the first aspect, the first and second segment bodies are provided with reaction force receiving portions that receive the reaction force generated in the coupling tool by the pushing operation of the second segment body. Because it is provided at least in the dovetail portion on the face side of the second segment body, regardless of the contact position of the shield jack, the connecting body is pushed through the reaction force receiving portion to attract the segment bodies together. Can be linked.
  And in addition to being able to achieve such an effect, since the reaction force receiving portion is configured to be detachable from the second segment body, each segment body adjacent in the tunnel circumferential direction is provided. Even after the butted portions are butted, the connector can be inserted from the face side.
  In other words, since the reaction force receiving portion is provided on the face side and the pushing force against the segment body is transmitted to the connector, for example, if the reaction force receiving portion is fixed to the segment body, the face side of the segment body Since an opening for inserting a connector cannot be provided at the end, before the operation of abutting the abutting portions of the segment bodies adjacent in the tunnel circumferential direction, from the connector insertion opening formed in the abutting portion. It is necessary to insert the coupling tool into the dovetail portion in advance, and after the butted portions of the segment bodies are butted together with the one end portion of the coupling tool projecting in the tunnel circumferential direction of the second segment body, the second Although it is necessary to push the segment main body, the position of the second segment main body is displaced during the abutting operation between the segment main bodies, and the protruding coupling tool One end portion is damaged in brought into contact with the first segment body, second segment body by the abutment is, it may become impossible to work pushing occurs an inclination to the feed direction. However, in this case, the connecting tool can be inserted after the abutting portions of the segment main bodies are abutted, so that the connecting tool contacts the first segment and breaks during the abutting operation of the abutting portions of the segment main bodies. And the second segment body cannot be pushed in.
  As a result, it is possible to improve the workability of the connecting operation between the segment main bodies because the connecting work between the segment main bodies does not interfere with the breakage of the connecting tool and the pushing operation of the second segment main body. became.
[0013]
  Claim3According to the invention of claim 1 or2In addition to being able to achieve the operational effect of the present invention, when the connecting tool is provided in the dovetail groove portion, the connecting tool is filled by filling a gap formed between the connecting tool and the dovetail groove portion. Since the restriction member for restricting the change of the posture is provided, the connecting tool can be smoothly inserted into the dovetail portion without falling down during the connecting operation of the segment main bodies.
  That is, when the connecting tool is provided in the dovetail part, the movement of the connecting tool is allowed by the gap formed between the connecting tool and the dovetail part, so that the dovetail part of the segment body during the pushing operation of the second segment body The connector that fits into the segment tends to fall over when it comes into contact with the segment body, and the segment body may not be able to be pushed in. Therefore, it is possible to smoothly insert the connector into the dovetail portion, and there is no problem in pushing the segment body.
  As a result, the workability of the connecting operation between the segment main bodies can be improved.
[0014]
  Claim4According to the invention, among the plurality of dovetail portions provided in the segment main body, the connecting tool is inserted in advance at an arbitrary selected position, and among the pre-inserted connecting tools, the adjacent segment main body is The reaction force generated in the connecting tool when the segment body is pushed and connected to the dovetail part of the segment body in which the connecting tool to be inserted into the adjacent segment body is inserted and arranged in advance by the pushing operation of the segment body. And an opening for inserting the coupling tool into the dovetail groove portion provided with the reaction force receiving section is provided in the abutting portion of the segment body, and the coupling tool is inserted from the opening. In addition, the segment main bodies can be attracted and connected regardless of the contact position of the shield jack.
  That is, even if the contact position of the shield jack is not located at the joint portion between the segment main bodies, the reaction force is received by the segment main body dovetail groove portion in which the connecting tool to be inserted into the adjacent segment main body is inserted and arranged in advance. And the connecting tool comes into contact with the reaction force receiving portion as the segment body is pushed into the adjacent segment body, and the pressing force against the adjacent segment body is caused by the reaction force receiving portion. It can be made to act as an attractive force which attracts and connects the segment main bodies.
  As a result, even if the contact position of the shield jack is out of the joint portion, it is possible to provide a tunnel segment that can quickly push in the connecting tool without trouble, and can perform the pulling connection between the segment bodies. became.
  And like thisIn addition to being able to achieve operational effects, the reaction force receiving portion is provided in a state that does not protrude from the outer surface of the segment body. There is little risk of contact with other objects, and therefore damage to the reaction force receiving portion due to contact with other objects can be prevented.
[0015]
  Claim5According to the present invention, claims 1 to3In addition to achieving the operational effects of the present invention, the dovetail groove portion includes an anchor portion embedded in the segment body, a reaction force receiving portion that receives a reaction force generated in the connection tool, and a push-in of the connection tool. Since it is formed by the connection metal fitting provided with the dovetail groove which attracts the segment main bodies, the dovetail groove connection portion provided with the reaction force receiving portion can be easily formed in the concrete segment.
  That is, the abutment surface of the connecting metal fitting comes to the abutting end in the circumferential direction of the concrete segment main body, and the anchor provided on the connecting metal fitting is embedded in the concrete segment main body so as to oppose the abutting end. Since the dovetail connection part with the force receiving part can be formed,
  As a result, it is possible to improve the workability of forming the concrete segment main body provided with the dovetail connecting portion provided with the reaction force receiving portion.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.
[0017]
1 and 2 show the outline of the tunnel segment connector R and the tunnel ring forming unit according to the present invention.
In the present embodiment, the A segment main body a, the B segment main body b, and the C segment main body c are sequentially connected to the existing tunnel ring TR constructed in an annular shape continuously in the tunnel circumferential direction X using the connector R. An example in the case of mounting and building a new tunnel ring TR is shown.
Here, the A segment main body a is a segment main body that is first attached to the existing tunnel TR. That is, it is a segment body that is first connected in the tunnel circumferential direction X when a new tunnel ring TR is constructed.
The B segment main body b is a segment main body that is sequentially connected in the tunnel circumferential direction X with the A segment main body a interposed therebetween, and among the segment main bodies forming one tunnel ring TR, the A segment main body a and C described later. All the segment bodies except the segment body c are the B segment body b.
The C segment body c is a segment body that is finally connected to complete one tunnel ring TR. That is, the C segment main body c is pushed into the gap formed by the two B segment main bodies b and connected.
In addition, these segment main bodies can be comprised by various segments, such as a concrete segment, a steel segment, a composite segment of a ductile + concrete, besides a ductile segment, for example.
[0018]
The segment bodies A, B, and C are connected to each other using a connector R as shown in FIG. FIG. 3 shows a mode in which the segment main bodies A, B, and C are connected.
[0019]
  As shown in FIG. 2, the connector R is substantially rectangular and has enlarged edges on both edges along the pushing direction Z of the connector R.Part 1have. Both of the enlarged edges 1 are connected by a plate-shaped body 2. Further, each enlarged edge portion 1 is formed with a tapered surface-shaped pinching portion 3 for actually attracting the segment main bodies F to each other. The interval between the clamping portions 3 is configured to be wider toward the side opposite to the pushing direction Z along the pushing direction Z of the connector R.Therefore, the pair of enlarged edge portions 1 in the connector R are formed in a tapered shape toward one side in the push-in direction Z.
  In the figure, 6 is a gap S formed between the connector R and the dovetail groove M when the connector R is provided in the dovetail groove M. It is a restricting member that restricts the posture from changing.
[0020]
On the other hand, of the end portions of the segment main bodies A, B, and C, both end portions in the tunnel circumferential direction X are provided with butting portions 4 for connecting to adjacent segment main bodies. And the dovetail part M is formed in the both ends along the tunnel longitudinal direction Y among the said butt | matching parts 4, respectively. The dovetail groove portion M is formed with a pinched portion 5 against which the pinching portion 3 comes into contact when the enlarged edge portion 1 of the connector R is inserted into the dovetail groove.
[0021]
The segment bodies are connected as follows. Here, the case where the A segment main body a and the B segment main body b shown in FIG. 3 are connected is taken as an example.
FIG. 3 shows a state in which the A segment body a is connected to an existing tunnel ring TR. In the following description, the tunnel longitudinal direction Y in the drawing is regarded as the vertical direction and the tunnel circumferential direction X is regarded as the left-right direction. In FIG. 3, the lower side is the face side of the tunnel shield, and the upper side is the wellhead side. Tunnel excavation is performed downward in FIG. Therefore, the B segment body b connected here is pushed upward in FIG. In the present embodiment, the direction in which the B segment body b is pushed in is referred to as the wellhead side, and the opposite side is referred to as the face side.
In both abutting portions 4 of the A segment main body a, dovetail groove portions M are formed at a total of four locations. Of these, the two on the side of the existing tunnel ring TR are the well-end side dovetail groove portion M1, and the other two are the face-side dovetail groove portion M2. The A segment main body a is attached to the existing tunnel ring TR in a state in which the wellhead side connector R1 is inserted into both the wellhead side dovetail grooves M1.
On the other hand, the well-side dovetail portion M1 and the face-side dovetail portion M2 are also formed in both abutting portions 4 of the B segment main body b connected to the A segment main body a. However, in the B segment main body b, the face side dovetail groove portion M2 of the butting portion 4 connected to the A segment main body a is provided with a face side connecting tool R2, and the well mouth side dovetail groove portion M1 of the other butting portion 4 has a wellhead. A side connector R1 is provided.
As shown in FIG. 3, in the C segment main body c, the face side dovetail part M2 is provided with a face side connector R2 in each of the butting portions 4.
[0022]
When the B segment main body b is pushed in, the wellhead side dovetail groove portion M1 of the B segment main body b is fitted to the wellhead side connector R1 provided in the wellhead side dovetail groove portion M1 of the A segment main body a. A face side connector R2 provided in the face side dovetail part M2 of the B segment body b is inserted into the face side dovetail part M2 of the A segment body a. When the B segment main body b is further pushed in this state, the A segment main body a and the B segment main body b are attracted and connected by the respective connecting tools R1 and R2.
In this case, the wellhead side connector R1 can contact the existing tunnel ring TR to obtain a pushing force, and one face side connector R2 can be pushed by a pushing means such as a jack J of a tunnel shield. Get.
[0023]
The connector R according to the present invention includes a backup material T. The backup material T is provided at one end of both the enlarged edge portions 1, and the protruding direction is set substantially parallel to the pushing direction Z of the connector R. In this way, the back-up material T is provided only on one of the enlarged edges 1, and it is the reaction force receiving portion 9 formed in the face-side dovetail portion M2 of the B segment body b that substantially pushes the connector R. And it is based on being the well mouth side dovetail part M1.
The backup material T may be attached and fixed in a recess 12 formed at the rear end of the enlarged edge 1 as shown in FIG. 2, or may be fixed by adhesion using an adhesive or the like. May be. Note that the backup material T may be provided at the rear ends of both of the enlarged edges 1.
As shown in FIG. 2, the backup material T is composed of, for example, a hollow cylindrical member 16. For example, in the case of the connector R1, the backup material T receives a predetermined pressing force from the existing tunnel ring TR, and in the case of the connector R2, the backup material T receives a predetermined pressing force from the reaction force receiving portion 9 as shown in FIG. Deforms out of plane. That is, since the A segment main body a and the B segment main body b are gradually attracted when the connecting tool R is pushed, the force required to push the connecting tool R increases accordingly. During this time, the backup material T is elastically deformed. However, plastic deformation starts to occur in the backup material T when the fastening force reaches a predetermined value. In this state, the fastening force by the connector R no longer increases, and the force that attracts the A segment body a and the B segment body b is held constant.
[0024]
As shown in FIG. 9, the dovetail groove M has a gap S because the portion other than the portion to be clamped 5 with respect to the clamping portion 3 of the connector R need not be in close contact with the connector R. Formed. If it is this, since it will become good in a state without casting other than the to-be-clamped part 5, the cutting allowance of the to-be-clamped part 5 decreases, and the workability | operativity of cutting work improves.
[0025]
  As shown in FIG. 8, the pit-side ant groove portion M1 of the ant groove portion M opens to the pit-side end portion 7 along the tunnel longitudinal direction Y, and the pit-side connector R1 isThe backup material T is directed to the wellhead side, and the enlarged edge 1 side provided with the backup material T isFrom the opening side, it is inserted into the well opening side dovetail groove portion M1 and pushed toward the center of the butting portion 4.
  Of the dovetail groove M, the face-side dovetail groove M2 has different shapes on the left and right along the tunnel circumferential direction X of the segment body F. As shown in FIGS. 7 and 8, the first segment body F1 (existing segment body) ) And the face side dovetail part M2 on the second segment body F2 side of the face side dovetail part M2 positioned at the abutting part 4 with the second segment body F2 connected to the first segment body F1 later, In addition, an opening 10 for inserting the face side connector R2 is provided in the abutting portion 4 with the first segment body F1, and the face side end 8 of the face side dovetail groove portion M2 is pushed into the face side end portion 8. Is provided with a reaction force receiving portion 9 that transmits the pushing force due to to the face-side coupling tool R2 via the backup material T.Accordingly, the face-side coupler R2 has a reaction force receiving portion in which the backup material T is directed toward the face and the enlarged edge portion 1 side including the backup material T is inserted into the face-side dovetail groove portion M2 from the opening 10. It will be pushed toward 9.The face side dovetail part M2 on the first segment main body F1 side is open to the face side end part 8 along the tunnel longitudinal direction Y in the same manner as the well side dovetail part M1, and the face of the second segment body F2 is open. The connector R2 provided in the side groove portion M2 is the second segment body.F2The face-side dovetail portion of the first segment body F1 from the opening side by pushing inM2And pushed toward the center of the butting portion 4.
[0026]
The operating principle of the connector R when the B segment body b is pushed in is shown below.
In addition, there are three types of combinations of two segment main bodies to be connected: AB, BB, and BC, and in each segment main body, the well-side connector R1 and the face-side connector R2 are each Although it is pushed in separately, the operating principle of any connector R is the same.
That is, the well-side connector R1 contacts the existing tunnel ring TR, and the face-side connector R2 contacts the reaction force receiving portion 9 formed in the face-side dovetail groove M2 by the pushing means J.
[0027]
The process of connecting the second segment body F2 using the connector R to the first segment body F1 attached to the existing tunnel ring TR will be described for the face side dovetail groove M2.
As shown in FIG. 6, between the second segment main body F2, the face side connecting tool R2 is sandwiched from the opening 10 for inserting the face side connecting tool R2 formed in the butting portion 4 located on the first segment main body F1 side. The holding part 3 on the side provided with the backup material T of the part 3 is inserted, and the holding part 3 on the side where the backup material T is not provided is exposed in the face side dovetail groove part M2 as shown in FIG. Move to the face side. At this time, the regulating member 6 formed of a rubber material integrally formed with the connector R2 fills the gap S formed between the face side connector R2 and the face side dovetail groove M2, and The change of the posture of the working face side connector R2 is restricted.
And the clamping part 3 of the said face side coupling tool R2 exposed by pushing operation of the 2nd segment main body F2 by the shield jack J is inserted in the face side dovetail groove part M2 of the 1st segment main body F1, and the said shield jack J The pushing force is transmitted from the reaction force receiving portion 9 formed on the second segment body F2 to the clamping portion 3 formed on the face-side connector R2 via the backup material T provided on the face-side connector R2. The two segment main bodies F are attracted and connected to each other by sliding contact with the respective sandwiched portions 5 in the face side dovetail groove portion M2 formed on the first and second segment main bodies F1 and F2. At this time, the backup material T is composed of a hollow cylindrical member 16 as shown in FIG. 2, and the backup material T which has received a predetermined pressing force is attracted and connected while being plastically deformed as shown in FIG. Thus, the fastening force can be held at a predetermined value.
The shield jack J is positioned at the joint portion 11 between the segment main bodies F, and does not need to be in direct contact with the face-piece-side connector R2. The pull-in connection between the segment main bodies F can be achieved simply by pushing the second segment main body F2. It can be carried out.
[0028]
[Another embodiment]
Other embodiments will be described below.
<1> The reaction force receiving portion 9 is not limited to the one formed in the face side dovetail groove portion M2 described in the previous embodiment. For example, as shown in FIGS. A plate wall extending from the segment main body F2 to the first segment main body F1 may be used.
In this case, if the backup material T is provided at least on the side, the backup material T is positioned on the line of action of the pushing force by the second segment main body F2, so that the face-side coupler R2 rotates during pushing. Such inconveniences do not occur.
At this time, it is necessary to form a concave portion corresponding to the plate wall forming the reaction force receiving portion 9 at the face side end portion 8 of the face side dovetail groove portion M2 of the first segment body F1.
<2> The reaction force receiver 9 is not limited to the one fixed to the second segment body F2 described in the previous embodiment. For example, as shown in FIGS. 11 (a) and 11 (b), It may be detachably formed by a screw-type plug 19 or the like. That is, the female thread portion 17 is formed at the face end 8 of the face dovetail portion M2 of the second segment main body F2, and the reaction screw receiving portion is formed by screwing and mounting the male screw portion 18 formed on the plug 19. To do. In this case, the connecting tool R can be inserted into the face side dovetail groove M2 of the second segment body F2 from the face side even after the abutting portions 4 between the first and second segment bodies are abutted. Furthermore, there is no need for a large opening (see opening 10 in FIG. 6) for inserting the connector R, and the dovetail groove M2 can be reduced in size and weight.
<3> The dovetail groove portion M used for the concrete segment is, for example, as shown in FIG. 12, the first segment among the connecting brackets embedded in the abutting portion 4 of the first segment body F1 and the second segment body F2. The face side dovetail part M1 and the well side dovetail part M2 of the main body and the well side dovetail part M2 of the second segment main body F2 are connected to the face side end part 8 or the well side end part 7 along the tunnel longitudinal direction. The connecting bracket 22 having an opening for fitting the tool R is used, and the face side dovetail part M2 of the second segment main body F2 is connected to the face segment connecting part R2 to the butting portion 4 with the first segment main body F1. The opening 10 for insertion is provided, and the pressing force due to the pressing of the second segment main body F2 is applied to the face end 8 of the face dovetail groove M2 via the backup material T. It may be of configurations using coupling brackets 23 formed by providing a reaction force receiving portion 9 to transmit the working face side coupler R2 Te.
<4> The dovetail groove portion M used for the concrete segment is, for example, as shown in FIGS. 13, 14, and 15, the anchor portion 13 embedded in the segment main body F and the reaction force receiving the reaction force generated in the connector R. It may be formed by the connecting metal fitting 15 provided with the portion 9 and the dovetail groove portion M that pulls the segment main bodies together by pressing the connecting tool R. The inserting operation of the connecting tool R1 and the connecting tool R2 into the connecting metal fitting 15 is performed through the opening 10 formed in the connecting metal fitting 15.
<5> The shape of the regulating member 6 is not limited to the shape described in the previous embodiment. For example, the regulating member 6 may have a protruding portion as shown in FIGS. The protrusion may be provided over the entire length of the connector R in the pushing direction Z of the connector R, or may be a part of the length. In short, any shape can be used as long as the posture of the connector R can be regulated so that the connector R does not fall down due to resistance when the first segment body F1 and the second segment body F2 are connected.
Further, as shown in FIG. 18, a protrusion may be formed in the dovetail groove M instead of being provided in the connector R main body. The material is not limited to a rubber material, and any material can be used as long as it can regulate the posture change of the connector R.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of a connecting portion of a tunnel segment according to the present invention.
FIG. 2 is a plan view showing a connector according to the present invention.
FIG. 3 is an explanatory view showing a connection mode of various segment bodies.
FIG. 4 is an explanatory view showing a protruding member in the middle of deformation
FIG. 5 is a perspective view showing a butt portion of a segment body according to the present invention.
FIG. 6 is a partial cross-sectional view showing an attachment mode of a connector according to the present invention.
FIG. 7 is a partially cutaway sectional view showing details of a connecting process of segment bodies according to the present invention.
FIG. 8 is a partially cutaway cross-sectional view showing a connection mode of segment bodies according to the present invention.
FIG. 9 is a partially enlarged longitudinal front view showing a connection mode by a connector according to the present invention.
FIG. 10 is an explanatory view showing another connection mode of the segment body according to the present invention.
FIG. 11 is an explanatory view showing another example of the connection mode of the segment body according to the present invention.
FIG. 12 is a perspective view showing a butt portion of another example of a segment body according to the present invention.
FIG. 13 is a perspective view showing a butt portion of another example of a segment body according to the present invention.
FIG. 14 is a cross-sectional plan view showing another example of the connection mode of the segment body according to the present invention.
FIG. 15 is a partially enlarged longitudinal front view showing another example of connection by the connector according to the present invention.
FIG. 16 is an explanatory diagram of connection showing another example of a connector according to the present invention.
FIG. 17 is a connection explanatory view showing another example of a connector according to the present invention.
FIG. 18 is an explanatory diagram of connection showing another example of a connector according to the present invention.
FIG. 19 is a connection explanatory diagram showing a connection mode of a conventional example.
FIG. 20 is a connection explanatory diagram showing a connection mode of a conventional example.
FIG. 21 is a connection explanatory diagram showing a connection mode of a conventional example.
[Explanation of symbols]
R connector
X Tunnel circumferential direction
Y Tunnel longitudinal direction
F1 1st segment body
F2 2nd segment body
M Dovetail
M1 well side dovetail
M2 face side dovetail
R connector
R1 wellhead sideConnector
R2 face sideConnector
S clearance
T Backup material
4 Butting part
6 Regulatory members
7 Well end side
8 Face side edge
9 Reaction force receiving part
10 opening
13 Anchor part
14 Dovetail
15 Connecting bracket

Claims

In order to construct a tunnel wall by pulling and connecting a plurality of tunnel segment bodies in the circumferential direction of the tunnel using a connector, the second segment body is arranged along the longitudinal direction of the tunnel with respect to the already constructed first segment body. In order to push and connect from the face side to the wellhead side, each of the first and second segment bodies has a butt portion for linking each other at an end portion along the circumferential direction of the tunnel, and each of the butt portions In the state where the well-portion-side dovetail groove portion is formed at the well-portion-side end portion of each, and the face-end dovetail groove portion is formed at the face-end end portion of each of the butting portions, and the first and second segment bodies are butted A pair of enlarged edge portions that can be individually fitted along both opposing dovetail groove portions are integrally provided, the contact surface of each dovetail groove portion with respect to the enlarged edge portion, and the enlarged edge portion as the dovetail groove And forming a connector formed in a tapered surface shape in which both the abutting portions are relatively close to each other, and having a wellhead-side connector in the wellhead-side dovetail portion of the first segment body, For the tunnel for connecting the first and second segment bodies by pushing the second segment body from the face side to the wellhead side, the face side dovetail portion of the second segment body is also provided with a face side connecting tool. A connecting portion of segments, and a reaction force receiving portion that receives a reaction force generated in the connecting tool by a pushing operation of the second segment main body, at least of the dovetail groove portions provided in the first and second segment main bodies, Provided in the face side dovetail part of the second segment body, and an opening for inserting the connector into the face side dovetail part in the butting part of the second segment body Ketea is, a pair of enlarged edge portion of the wellhead side connector and the working face-side connector is formed in a tapered shape toward the one of the push-in direction, wellhead side connector of the first segment body side, the The face side connector on the second segment main body side is arranged with the taper side facing the face side, and the taper side is faced toward the wellhead side, and the wellhead side connector and face face side connector are a pair of enlargements. A backup material is provided on one side of the edge, and the wellhead-side connector is fitted with an enlarged edge provided with the backup material in the wellhead-side dovetail portion of the first segment body, and the backup material is brought into contact with the existing tunnel ring. The face side connector is arranged so that the enlarged edge portion provided with the backup material is fitted into the face side dovetail portion of the second segment body, and the backup material is brought into contact with the reaction force receiving portion. Connecting portions of the segments tunnel being.

In order to construct a tunnel wall by pulling and connecting a plurality of tunnel segment bodies in the circumferential direction of the tunnel using a connector, the second segment body is arranged along the longitudinal direction of the tunnel with respect to the already constructed first segment body. In order to push and connect from the face side to the wellhead side, each of the first and second segment bodies has a butt portion for linking each other at an end portion along the circumferential direction of the tunnel, and each of the butt portions In the state where the well-portion-side dovetail groove portion is formed at the well-portion-side end portion, and the face-end dovetail groove portion is formed at the face-end end portion of each of the butted portions, and the first and second segment bodies are abutted. A pair of enlarged edge portions that can be individually fitted along both opposing dovetail groove portions are integrally provided, the contact surface of each dovetail groove portion with respect to the enlarged edge portion, and the enlarged edge portion as the dovetail groove And forming a connector formed in a tapered surface shape in which both the abutting portions are relatively close to each other, and having a wellhead-side connector in the wellhead-side dovetail portion of the first segment body, For the tunnel for connecting the first and second segment bodies by pushing the second segment body from the face side to the wellhead side, the face side dovetail portion of the second segment body is also provided with a face side connecting tool. A connecting portion of segments, wherein a reaction force receiving portion that receives a reaction force generated in the connecting tool by a pushing operation of the second segment body is at least one of the dovetail portions provided in the first and second segment bodies. A tunnel segment provided in the dovetail portion on the face side of the second segment body, and wherein the reaction force receiving portion is configured to be detachable from the second segment body. The connecting portion of the door.

When the connector is provided in the dovetail portion, a restricting member is provided for restricting a change in the posture of the connector by filling a gap formed between the connector and the dovetail portion. The connection part of the segment for tunnels of Claim 1 or 2 .

A plurality of dovetail grooves for joining to the adjacent segment main body are provided at the abutting portion with the adjacent segment main body adjacent in the circumferential direction, and a pair of enlarged edges that can be fitted into the dovetail groove in the direction along the tunnel longitudinal direction are integrated. The expansion edge of the connecting tool for connecting segments and the contact surface of the dovetail groove with respect to the enlargement edge are inserted into the expansion edge along the dovetail groove. A tunnel segment which is formed in a tapered surface shape close to the adjacent segment body side, and the connection tool is inserted in advance at any selected position among the plurality of dovetail portions provided in the segment body. In the pre-inserted connector, the segment body is inserted into the dovetail portion of the adjacent segment body by pushing the segment body against the adjacent segment body. In the dovetail portion of the segment body where the connecting tool is inserted and arranged in advance, a reaction force receiving portion that receives the reaction force generated in the connecting device when the segment body is pushed and connected is provided, and the reaction force receiving portion is provided. and Ri Oh provided an opening for inserting the connector in the butt portion of the segment body dovetail groove, the reaction force receiving portion, a tunnel is provided in a state of not protruding from the outer surface of the segment body segment.

The connecting dove provided with the dovetail portion including an anchor portion embedded in the segment main body, a reaction force receiving portion that receives a reaction force generated in the coupling tool, and a dovetail groove that pulls the segment main bodies together by pressing the coupling tool. A tunnel segment connecting bracket used for the tunnel segment connecting portion according to any one of claims 1 to 3 , wherein the tunnel segment connecting bracket is used.