JP3897480B2

JP3897480B2 - Start method and apparatus for inclined shaft excavator

Info

Publication number: JP3897480B2
Application number: JP11469699A
Authority: JP
Inventors: 雄二郎渋川; 秀樹千原; 三砂征杉下
Original assignee: Tokyo Electric Power Co Inc; Okumura Corp
Current assignee: Tokyo Electric Power Co Inc; Okumura Corp
Priority date: 1999-04-22
Filing date: 1999-04-22
Publication date: 2007-03-22
Anticipated expiration: 2019-04-22
Also published as: JP2000303775A

Description

【０００１】
【発明の属する技術分野】
本発明は既に築造されている水平坑から斜め上方に向かって斜坑を掘削する掘削機の発進方法とその装置に関するものである。
【０００２】
【従来の技術】
従来から、例えば、山岳地盤に水力発電所の水圧管路等のような斜坑を掘削するには、既に築造された水平坑の斜坑掘削位置にまで斜坑掘削機を搬入し、この斜坑掘削機を斜め上方に起立させて水平坑の上方部に予め掘削しておいた一定深さの斜坑発進口に臨ませたのち、該斜坑掘削機を発進させて斜坑発進口内から斜坑を掘削するようにしているが、発進時において斜坑掘削機を滑車やウインチ等を利用して斜め上方に起立させる発進準備作業に多大な手間と労力を要すると共に危険を伴うものであり、また、その作業の完了後においても滑車やウインチ等の撤去作業を必要し、作業の煩雑化が避けられないという問題点があった。
【０００３】
このような問題点を解消するために、本願出願人等は特開平８ー１８９２８５号公報に記載しているような斜坑掘削機の発進装置を開発した。この斜坑掘削機の発進装置は、水平台枠上に傾動架台を起伏自在に設け、該傾動架台上に斜坑掘削機を塔載した状態で水平台枠を斜坑掘削位置に固定させたのち、傾動架台を斜坑掘削方向に指向する角度までジャッキにより起立させて発進斜坑部に臨ませ、しかるのち、この傾動架台上に沿って斜坑掘削機を発進させるように構成している。
【０００４】
【発明が解決しようとする課題】
しかしながら、斜坑掘削位置に水平台枠を固定し、この水平台枠上の傾動架台を斜め上方に向かって起立させて該傾動架台上の斜坑掘削機を、予め斜坑掘削位置における水平坑の上方部に設けておいた一定深さの斜坑発進口に臨ませるには、水平坑と斜坑発進口とが交差する坑壁部を傾動架台の移動軌跡に沿って斜めに切除して水平坑に対して斜め下方に向いた傾斜壁面部を形成することにより、該傾斜壁面部に沿って水平坑から斜坑発進口まで傾動架台の起立を許容する空間部を設けておく必要があるが、この空間部の形成は通常、上記坑壁部を発破によって切り崩すことにより行われるために計画通りの寸法に切除するのが困難でどうしても空間部が大きくなり、傾動架台を起立させた時に該傾動架台の先端面と上記傾斜壁面部との間に隙間が発生することになる。
【０００５】
この隙間が存在すると、上記傾動架台を斜坑発進口に向けたのち、斜坑掘削機の後方側における傾動架台上に順次セグメントを設置して該セグメントに推進ジャッキの反力を支持させながら斜坑掘削機を斜坑発進口内に進入させ、さらに、斜坑発進口内から斜坑を掘進していく際に、上記隙間部にはセグメントの設置ができなくなり、また、この隙間の存在によって作業者が傾動架台から斜坑掘削機内に進入する際の安全な通行路の確保が困難となる。
【０００６】
そのため、斜坑発進口と傾動架台の先端間を鋼材によって架橋することが行われているが、この架橋作業は傾動架台から前方側の水平坑内の作業空間が狭く、その上、斜坑発進口内に鋼材の吊支用クレーンやウインチ等の設備を設けるには手間を要すると共にその撤去作業も必要となるので、このような設備を使用することなく全て人力で行っているのが現状であり、従って、作業能率が極めて悪くなるばかりでなく、高所での作業となるために非常に危険である。
【０００７】
一方、上記隙間部をなくする方法として、発破により水平坑と斜坑発進口とが交差する坑壁部に上記傾斜壁面部を形成したのち、この傾斜壁面部の面に接合するように傾動架台を製作することも考えられるが、これでは工期が大幅に遅れることになり、そのため、どうしても予め傾動架台を製作しておく必要がある。
【０００８】
本発明は上記のような問題点に鑑みてなされたもので、その目的とするところは、作業員による上記隙間に対する架橋作業を必要とすることなく、傾動架台を起立させて該傾動架台上の斜坑掘削機を斜坑発進口に臨ませたのち、自動的に上記隙間に架橋を行えるようにした斜坑掘削機の発進方法とその装置を提供するにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、本発明の斜坑掘削機の発進方法は、請求項１に記載しているように、水平坑から斜め上方に向けて斜坑掘削機を発進させるに際して、水平坑の底面に固定される水平台枠と、この水平台枠上に重ね合わされると共に後端部を該水平台枠の後端部に枢着され且つ斜坑掘削機を塔載させるようにしてなる傾動架台と、この傾動架台を水平台枠に対して起伏させる起伏手段と、上記傾動架台に複数本、並列状態で且つそれぞれ単独的に傾動架台の先端から前方に向かって突出可能に内装されている延伸部材とからなる発進装置を用いて斜坑掘削機を掘削すべき斜坑側に向けて発進させる方法であって、斜坑掘削機に搭載した傾動架台を起伏手段により、搭載した斜坑掘削機が掘削すべき斜坑の方向に指向し、傾動架台の先端面が斜坑発進口の開口下傾端に連なる傾斜壁面部の上端部に隙間を介して対向する状態となるまで起立させ、この状態で、傾動架台に内装している各延伸部材を、傾斜壁面部の上端部の凹凸面に応じてそれぞれ前方に突出させ、これらの延伸部材の先端面を傾斜壁面部の上端部に斜坑発進口の開口下傾端の幅方向に沿って当接させて傾斜壁面部と傾動架台との間の隙間に架橋させ、各延伸部材の先端を該傾斜壁面部の岩盤にアンカーを打ち込むことによって固定し、その状態で、斜坑掘削機を傾動架台及び各延伸部材上を摺動させながら斜坑発進口に向かって発進させることを特徴としている。
【００１０】
また、上記斜坑掘削機の発進装置は、請求項２に記載したように、水平坑から斜め上方に向けて斜坑掘削機を発進させるための斜坑掘削機の発進装置であって、水平坑の底面に固定される水平台枠と、この水平台枠上に重ね合わされると共に後端部を該水平台枠の後端部に枢着され且つ斜坑掘削機を塔載させるようにしてなる傾動架台と、この傾動架台を水平台枠に対して起伏させる起伏手段と、上記傾動架台に複数本、並列状態で且つそれぞれ単独的に傾動架台の先端から前方に向かって突出可能に内装されている延伸部材と、これらの延伸部材の先端面を斜坑発進口の開口下傾端に連なる傾斜壁面部の上端部に当接させた際に該延伸部材の先端を傾斜面部の岩盤に固定させるアンカーとからなることを特徴とする。
【００１１】
【作用】
水平坑内における斜坑掘削位置に水平台枠を固定したのち、該水平台枠上に配設している傾動架台を斜め上方に向かって起立させると、この傾動架台の先端が水平坑と斜坑発進口とが交差する坑壁部に形成された傾斜壁面部に隙間を存して対向しながら移動し、斜坑掘削方向に指向する所定の角度まで起立した時に停止させる。この状態においては、該傾動架台の先端面が斜坑発進口の開口下傾端に連なる傾斜壁面部の上端部に対向すると共に傾動架台上の斜坑掘削機は斜坑発進口に臨んだ状態となる。なお、傾斜状態に起立した傾動架台の傾斜下面と水平坑との間に転倒防止架台を介在させれば、斜坑掘削機を塔載した傾動架台の不測の転倒を防止し、所定の角度に指向させた状態で一層安定的に支持しておくことができる。
【００１２】
この状態にしたのち、傾動架台に内装している延伸部材を傾動架台の先端から前方に向かって突出させ、該延伸部材の先端面（前端面）を上記傾斜壁面部の上端部に当接させると、この延伸部材によって傾動架台の先端と傾斜壁面部の上端間の隙間が架橋された状態となり、この状態にして該延伸部材の先端を傾斜壁面部の上端にアンカー等によって固定する。
【００１３】
こうして、傾動架台の先端と傾斜壁面部の上端間の隙間に延伸部材を架橋状態に固定したのち、傾動架台上の斜坑掘削機を発進させる。この際、予め、水平台枠の後方側に推進反力受台を設置しておき、この推進反力受台によって斜坑掘削機の推進反力を受止させると共に一定距離の推進毎に斜坑掘削機と推進反力受台間にセグメントを介在させながら斜坑掘削機を傾動架台上から上記延伸部材上を通過させて該斜坑掘削機により斜坑発進口の延長方向に斜坑を掘削する。
【００１４】
【発明の実施の形態】
本発明の具体的な実施の形態を図面について説明すると、図１乃至図４において、斜坑掘削機Ａの発進装置は、既設の水平坑Ｂにおける斜坑掘削位置の底面に固定される水平台枠１と、この水平台枠１上に重ね合わされて配設されていると共にその後端部を該水平台枠１の後端部に起伏自在に枢着されてあり且つ上記斜坑掘削機Ａを上載させる傾動架台２と、この傾動架台２を起伏させる起伏手段３と、上記傾動架台２に内装されてジャッキ又はウインチ等の押出手段４により傾動架台２の長さ方向に移動して傾動架台２の先端から前方に向かって突出可能にしてなる一定長さを有する棒状の延伸部材５とから構成されている。
【００１５】
上記発進装置の構造をさらに詳しく述べると、水平台枠１は平面長方形状に形成されていてその前後両側部に、上記水平坑Ｂに敷設されたレールＲ上を走行する車輪1aを回転自在に軸支している一方、この水平台枠１上に配設した上記傾動架台２は同じく平面長方形状の枠からなる。この傾動架台２の幅は図５に示すように、斜坑掘削機Ａの外径（横幅）に略等しく形成されていると共に長さは斜坑掘削機Ａの長さよりもやや長く形成されてあり、その両側部に長さ方向に適宜間隔毎に上面が斜坑掘削機Ａの下側周面に沿う多角形状面又は凹弧面2bに形成されたキャンバー2aを一体的に固着して、これらのキャンバー2a上に斜坑掘削機Ａをそのカッター等の掘削部A1側を前方に向けた状態で前後方向に摺動自在に載置させるように構成している。
【００１６】
さらに、上記傾動架台２には図５に示すように、幅方向に一定間隔毎にこの傾動架台２と略々同じ長さを有する複数の固定角筒体６がその前端開口部を傾動架台２の先端面（前端面）に一致させ且つ長さ方向を傾動架台２の長さ方向に向けて並列状態に固着している。なお、これらの固定角筒体６を上記キャンバー2a内にその上面がキャンバー2aの上面と面一に連続するように埋設状態に固定してキャンバー2aと共に斜坑掘削機Ａの下側周面を載置させるように構成しているが、上面をキャンバー2aの上面に一致させることなくキャンバー2a内に全体的に埋設した構造としておいてもよく、或いはキャンバー2aの上面から少なくともその上端部を突出させた状態に固定してキャンバー2aに斜坑掘削機Ａを受止させることなくこれらの固定角筒体６の上面によって斜坑掘削機Ａを受止させるように構成しておいてもよい。
【００１７】
これらの各固定角筒体６の前半部内には、固定各筒体６の１／２程度の長さを有する鋼製角パイプ又は角棒からなる上記棒状の延伸部材５が摺動自在に挿嵌されていてそれぞれの固定各筒体６の開口前端から突出可能にしていると共に、後部内には図４に示すように、延伸部材５の押出手段４である油圧ジャッキ4Aが固定されている。そして、各油圧ジャッキ4Aのピストンロッド4aの先端面をそれぞれ対応する延伸部材５の後端面に当接させてあり、該油圧ジャッキ4Aのピストンロッドを4aを伸長させることにより延伸部材５をそれぞれの固定角筒体６の開口前端から単独的に突出させるように構成している。なお、油圧ジャッキ4Aのピストンロッド4aを延伸部材５の後端に一体的に連結してピストンロッド4aを伸縮させることにより延伸部材５を固定角筒体６の開口前端から出没自在に構成しておいてもよい。
【００１８】
このように延伸部材５を摺動自在に内装した複数本の固定角筒体６を一体に設けている傾動架台２の後端部下面にはブラケット2cが突設してあり、このブラケット2cと水平台枠１の後端面に突設したブラケット1bとを枢軸1cによって傾動架台２が水平台枠１に対して上方に向かって起立可能に枢着している。さらに、傾動架台２の前半部両側端に、側面横長長方形状の適宜高さの姿勢保持枠７、７の下端を固着させてあり、傾動架台２の両側端から上方に突出したこれらの姿勢保持枠７、７の対向内面を斜坑掘削機Ａの前半部の両側周面から下周面に亘って受止する凹弧面に形成している。
【００１９】
また、水平台枠１は傾動架台２よりも幅広く形成されていて、平面から見た場合、図４に示すようにその両側端部が傾動架台２の両側端面から姿勢保持枠７、７の厚みに略等しい幅だけ突出させてあり、この突出した両側端部と傾動架台２と一体の上記姿勢保持枠７、７とを図３に示すように、リンク機構８を介して連結すると共に該リンク機構８と水平台枠２の両側端部とを油圧ジャッキ９によって連結して傾動架台２の上記起伏手段３を構成している。詳しくは、リンク機構８を互いに屈折自在に枢着8cした一対リンク8a、8bより構成して一方のリンク8aの端部を上記姿勢保持枠７の後端面に回動自在に枢着8dすると共に他方のリンク8bを水平台枠１の前側両側端部の上面に回動自在に枢着8eし、さらに、その枢着部8eに上記油圧ジャッキ９の外底部を回動自在に枢着していると共に該油圧ジャッキ９のピストンロッド9aを上記一方のリンク8aの中央部に枢着9bして該ピストンロッド9aを伸縮させることによりリンク機構８を介して傾動架台２を起伏させるように構成している。なお、傾動架台２又は上記姿勢保持枠７の適所に、傾動架台２が起立した際に斜坑掘削機Ａがずり落ちるのを防止する係止部材（図示せず）を設けておいてもよい。
【００２０】
さらに、起伏手段３としては、リンク機構８と油圧ジャッキ９とから構成する以外に、例えば、螺子機構のように回転による螺子送りによって傾動架台２を起伏させるようにした手段を採用してもよい。また、リンク機構８を採用することなく、油圧ジャッキ９等の伸縮機構を水平台枠１と傾動架台２との間に直接連結させた起伏手段３を構成しておいてもよい。
【００２１】
10は傾動架台２を起立、傾動させて発進させる際に、該傾動架台２上の斜坑掘削機Ａの後端面を支持する推進反力受台で、水平設置枠部10a と傾斜受止枠部10b と傾斜補強枠部10c とからなり、傾斜受止枠部10b の傾斜面は掘削すべき斜坑Ｃの中心線に略直交する面に形成されている。11は斜坑掘削機Ａの後端部内周面に固着した複数本の推進ジャッキで、そのロッド端に取付けているスプレッダ11a を上記推進反力受台10の傾斜受止枠部10b 上に受止させるように構成している。なお、この推進ジャッキ11は斜坑掘削機Ａに取付けることなく、斜坑掘削機Ａの後端面と推進反力受台10の傾斜受止枠部10b との間に介在させるようにしてもよい。又、この推進ジャッキ11に替えて螺子機構等による推進手段を採用してもよい。
【００２２】
12は傾動架台２を所定の角度まで起立させた際に、該傾動架台２の底面と水平坑Ｂの底面との間に介在させる転倒防止架台で、その両側枠の幅を上記水平台枠１の幅よりも大きくして該水平台枠１を跨ぐようにして下端を水平坑Ｂの底面上に設置させるようにしていると共に、後面を斜坑掘削角度と略同一角度に傾斜した傾斜枠部12a に形成し、この傾斜枠部12a によって所定角度まで起立した傾動架台２の底面（下面）を図２、図６に示すように、受止させるように構成している。
【００２３】
さらに、この転倒防止架台12の傾斜枠部12a の両側部には複数個のボルト孔12b を穿設している一方、上記傾動架台２の両側端部にもこれらのボルト孔12b に対向する複数個のボルト孔2dを穿設してあり、ボルト孔2d、12b 間をボルト・ナット13で連結するように構成している。
【００２４】
次に、以上のように構成した斜坑掘削機Ａの発進装置を用いて、斜坑掘削機Ａを掘削すべき斜坑Ｃ側に向け、斜行発進させて斜坑Ｃを掘削する方法について説明する。まず、傾動架台２を備えている水平台枠１を既設水平坑Ｂの底面に敷設されたレールＲ上を走行させて斜坑掘削位置で停止させる。この際、予め、水平台枠１上に水平状態に折り重ねている傾動架台２上に斜坑掘削機Ａを載置して斜坑掘削位置まで搬送してもよく、斜坑掘削位置で該傾動架台２上に斜坑掘削機Ａを載置してもよい。また、斜坑掘削機Ａを傾動架台２上にワイヤ等で固定しておき、発進時にその固定を解くようにしてもよい。
【００２５】
既設水平坑Ｂにおける斜坑掘削位置には、該水平坑Ｂと掘削すべき斜坑Ｃとの交点部分から水平坑Ｂの前方延長方向に向かって水平台枠１が仮設置可能な長さを有する水平坑部B'が設けられている。この水平坑部B'は底面が水平坑Ｂの面一で且つ水平坑Ｂの径よりも小径に形成されてあり、これらの水平坑Ｂと水平坑部B'との連設部分における上周壁面に上記斜坑Ｃの掘削方向である斜め前方に向かって斜坑掘削機Ａの前端部が挿入可能な深さと径を有する斜め上向きの斜坑発進口C₁が掘削、形成されている。さらに、この斜坑発進口C₁を介して段差が生じている水平坑Ｂと水平坑部B'との坑壁部、即ち、水平坑部B'と斜坑発進口C₁とが交差する坑壁部を発破等によって斜めに切除して水平坑部B'の後端上周壁面から斜坑発進口C₁の開口下傾端に向かって斜め上方に傾斜した傾斜壁面部Ｄを形成している。
【００２６】
そして、上記傾斜壁面部Ｄは斜坑掘削機Ａを上載した上記傾動架台２の先端面との間に隙間Ｆを存するように該傾動架台２の移動軌跡に沿って設けられていると共に、該傾斜壁面部Ｄが面している斜坑発進口C₁の下方部は水平坑Ｂから斜坑発進口C₁まで傾動架台２の起立を許容する空間部Ｅに形成されている。なお、水平坑Ｂの中間部から斜坑Ｃを掘削する場合には水平坑Ｂの前方延長部を水平坑部B'に利用でき、水平坑Ｂの延長部が存在しない場合には水平台枠１の長さに略等しい長さの水平坑部B'を掘削する。また、斜坑発進口C₁の下向き延長線上における水平坑Ｂの底面には推進反力受台10の設置用ピット14が掘削されている。
【００２７】
斜坑掘削位置まで走行した発進用装置の水平枠台１は、図２に示すように、その前端を固定用金物15を介してピン16により固定アンカー17に連結することによってその位置に固定され、さらに、水平枠台１の後端部下面と水平坑Ｂの底面との間にライナー18を介在させて水平枠台１が横方向に傾動するのを防止する。なお、水平枠台１を斜坑掘削位置に固定させる前に、該水平枠台１を水平坑部B'内に挿入しておき、その状態で推進反力受台10をピット14内に設置してアンカー19により固定し、該推進反力受台10の固定後、水平枠台１を斜坑掘削位置まで後退させて固定する。
【００２８】
このように水平枠台１を固定したのち、該水平枠台１とその上に折り畳まれた傾動架台２とを連結している起伏手段３の油圧ジャッキ９のロッドを伸長させると、リンク機構８を介して傾動架台２が後端枢着部1cを中心として上方に回動して、斜坑発進口C₁の下方空間部Ｅをその先端が水平坑部B'の後端上周壁面から斜坑発進口C₁の開口下傾端に連なった傾斜壁面部Ｄに沿って移動しながら起立していく。この起立によって傾動架台２のキャンバー2a上に載置されている斜坑掘削機Ａが後方に滑り落ちようとするが、傾動架台２に設けている係止部材（図示せず）によって後方側への滑動（前方側へは係止部材から離間して自由に滑動できる）を阻止することができ、或いは、推進反力受台10の傾斜受止枠部10a に推進ジャッキ11のスプレッダ11a を当接させることによって阻止する。
【００２９】
傾動架台２が一定の角度まで起立して斜坑掘削機Ａが掘削すべき斜坑Ｃの方向に指向し、該傾動架台２の先端面（前端面）が斜坑発進口C₁の開口下傾端に連なる上記傾斜壁面部Ｄの上端部に隙間Ｆを介して対向すると共に傾動架台２上の斜坑掘削機Ａは斜坑発進口に臨んだ状態となった時に、起伏手段３の油圧ジャッキ９の作動を停止させ、傾斜した傾動架台２の底面と水平坑Ｂの底面との間に転倒防止架台12を介在させて、その傾斜枠部12a で傾動架台２の底面を受止させ、ボルト・ナット13によって傾斜枠部12a と傾動架台２とを一体に固着すると共に転倒防止架台12の下端を水平坑Ｂの底面にアンカーを打ち込むことによって固定する。この状態にすることによって傾動架台２が確実に上記傾斜角度を維持すると共に前後左右方向への転倒を防止される。
【００３０】
この状態にしたのち、傾動架台２のキャンバー2aの幅方向に小間隔毎に並列している複数本の固定角筒体６の後部内に固定している押出手段４である油圧ジャッキ4Aのピストンロッド4aを伸長させることにより、各固定角筒体６に内装している延伸部材５をそれぞれの固定角筒体６の先端から前方に突出させ、これらの延伸部材５の先端面を上記傾斜壁面部Ｄの上端部に斜坑発進口C₁の開口下傾端の幅方向に沿って当接させて傾斜壁面部Ｄと傾動架台２との間の隙間Ｆにこれらの延伸部材５を架橋させた状態にする。そして、傾斜壁面部Ｄの上端部に当接した各延伸部材５の先端を該傾斜壁面部Ｄの岩盤にアンカー20を打ち込むことによって固定する。
【００３１】
こうして、傾動架台２の先端と傾斜壁面部Ｄの上端間の隙間Ｆに延伸部材５を架橋状態に固定したのち、推進反力受台10に反力を受止させて推進ジャッキ11を伸長させると、斜坑掘削機Ａが傾動架台２のキャンバー2aの凹弧面上を摺動しながら、斜坑発進口C₁に向かって発進する。この時、斜坑掘削機Ａが傾動架台２の前半両側端部に突設している姿勢保持枠７によって左右方向の妄動を規制されながら斜坑発進口C₁に向かって正確に推進する。
【００３２】
推進ジャッキ11による１ストローク分の推進が行われると、推進ジャッキ11を順次収縮させてそのスプレッダ11a と推進反力受台10の傾斜受止枠部10b との間に１リング分のセグメントＳを介在させ、このセグメントＳに推進反力を受止させて再び、推進ジャッキ11を伸長させることにより斜坑掘削機Ａを前進させ、この作業を繰り返すことによって斜坑掘削機Ａの前端部を上記延伸部材５上を通過させて斜坑発進口C₁内に進入させる。
【００３３】
斜坑発進口C₁の切羽面に斜坑掘削機Ａの前端掘削部A1が当接した位置まで斜坑掘削機Ａが前進すると、該掘削部A1の前端面に設けているカッターを回転させながら推進ジャッキ11を伸長させて斜坑Ｃの掘進を開始する。この時、斜坑掘削機Ａはその胴部に設けている後述するグリッパA5、A6が斜坑発進口C₁内に達していなくて斜坑掘削壁面にグリッパA5、A6を圧着させることができないために、斜坑掘削機Ａのカッターを回転して掘進すると、その回転反力によって斜坑掘削機Ａがローリングするので、斜坑掘削機Ａを傾動架台２にワイヤ等で前後動可能に且つ回転不能に固定しておく。このようにして、斜坑掘削機Ａが斜坑Ｃを掘進しながら全長が斜坑発進口C₁から斜坑Ｂ内に没入した状態となれば、発進用装置、即ち、傾動架台２を備えた水平台枠１や推進反力受台10、転倒防止架台12等を撤去する。
【００３４】
斜坑掘削機Ａは公知のように、前端にカッター等の掘削部A1を有する前胴A2と中胴A3、後胴A4を有し、前後胴A2、A4が中胴A3を介して互いに伸縮自在に連結していると共にこれらの前後胴A2 A4に掘削した斜坑Ｃの壁面に着脱自在に圧着するフロントグリッパA5とリヤグリッパA6とを夫々備えている。そして、リヤグリッパA6を掘削壁面に圧着させて掘削機全体を支持させた状態で前胴A2を前方に伸長させながら斜坑Ｃを掘進し、一定長の斜坑Ｃの掘削後、フロントグリッパA5を掘削地盤に圧着させる一方、リヤグリッパA6を掘削地盤からの圧着を解き、後胴A4を前胴A2側に引き寄せると共に斜坑掘削機Ａの後方部にセグメントＳを順次組立てる作業を繰り返しながら斜坑Ｃを掘進していくものである。なお、斜坑発進口C₁の長さを斜坑掘削機Ａの長さより長くしておくと、斜坑掘削機Ａが発進用装置上にあるときは、ローリングが生じないので、傾動架台２に回転不能に固定する必要もなく、掘削開始からフロントグリッパA5とリヤグリッパA6を斜坑発進口C₁の壁面に押し付けることによってローリングを防止することができる。
【００３５】
また、傾動架台２の先端と斜坑発進口C₁の下端に連なる上記傾斜壁面部Ｄの上端間の隙間Ｆには複数本の延伸部材５が架橋状態で固定されているので、この延伸部材５上にセグメントＳを配設することができると共に該延伸部材５上を通じて傾動架台２側と斜坑掘削機Ａ側との通行路の確保が可能となるものである。
【００３６】
なお、以上の実施例において、延伸部材５の押出手段４としては油圧ジャッキ4Aを用いているが、その他の手段、例えば、図７に示すようにウインチ41を用いた押出手段を採用してもよい。即ち、各固定角筒体６内に該固定角筒体６の開口前端から突出可能に配設されている延伸部材５の後端下部にワイヤ42の先端を連結すると共にこのワイヤ42を固定角筒体６の開口前端の下縁部に回転自在に軸支されたシーブ43に掛け渡したのち、水平台枠１の後方における水平坑Ｂ上に設置したウインチ42にガイドシーブ44を介して巻装し、ウインチ42をワイヤ42の巻き戻し方向に作動させることにより、固定角筒体６から延伸部材５を突出させるように構成してもよい。また、傾動架台２のキャンバー2aに複数本の延伸部材５を並列状態に配設することなく、一枚の湾曲板状の延伸部材を傾動架台２の先端からジャッキ等によって突出させるように構成しておいてもよい。
【００３７】
【発明の効果】
以上のように本発明によれば、水平坑の底面に固定される水平台枠上に斜坑掘削機を塔載させる傾動架台を重ね合わせ状態で配設して該傾動架台の後端を水平台枠の後端に起伏自在に枢着してなる発進装置において、上記傾動架台にこの傾動架台の先端から前方に向かって突出可能な延伸部材を内装していることを特徴とするものであるから、水平架台を斜坑掘削位置に配設することによって簡単に斜坑掘削機の発進準備を完了することができると共に、水平架台上の傾動架台を上方に起立させることによって該傾動架台上の斜坑掘削機を円滑且つ正確に掘削すべき斜坑の発進口に臨ませることができるのは勿論、傾動架台に前方に向かって突出可能な延伸部材を内装しているので、傾動架台を起立させて斜坑掘削機を斜坑発進口に臨ませたのち、この延伸部材を油圧ジャッキ等の押出手段によって前方に突出させれば、該延伸部材の先端を人手を要することなく正確且つ迅速に斜坑発進口の開口下端側の壁面部に当接させることができ、従って、斜坑発進口の開口下端と傾動架台の先端間の隙間に自動的に且つ安全に延伸部材を架橋させることができて、この延伸部材上におけるセグメントの配設や該延伸部材上を通じての傾動架台側と斜坑掘削機側との通行路の確保が可能となるものである。
【００３８】
さらに、上記延伸部材を傾動架台に複数本、並列状態で内装し、且つそれぞれの延伸部材を油圧ジャッキ等の押出手段によって単独的に傾動架台の先端から突出可能に構成しているので、斜坑発進口の開口下端側における延伸部材の先端当接壁面が凹凸面であっても、その凹凸面に応じて各延伸部材を突出させて全ての延伸部材の先端を確実に対向壁面に当接させることができ、延伸部材を壁面に強固に固定することができて一層安定した延伸部材の架橋構造を形成し得るものである。
【図面の簡単な説明】
【図１】斜坑掘削機を発進用装置を配設した状態の簡略縦断側面図、
【図２】斜坑掘削機を斜坑掘削側に向けた状態の発進装置の側面図、
【図３】傾動架台を水平台枠上に折り畳んだ状態の側面図、
【図４】その簡略平面図、
【図５】発進装置の簡略正面図、
【図６】斜坑を掘削している状態の簡略側面図、
【図７】延伸部材の押出手段の他の例を示す側面図。
【符号の説明】
１水平台枠
２傾動架台
３起伏手段
４押出手段
4A 油圧ジャッキ
５延伸部材
６固定角筒体
10 推進反力受台
11 推進ジャッキ
Ａ斜坑掘削機
Ｂ水平坑
Ｃ斜坑
C₁ 斜坑発進口
Ｄ傾斜壁面部
Ｅ空間部[0001]
BACKGROUND OF THE INVENTION
The present invention starts an excavator that excavates an inclined shaft from a horizontal shaft that has already been built to an obliquely upward direction. The method and its It relates to the device.
[0002]
[Prior art]
Conventionally, for example, in order to excavate a tilt shaft such as a hydraulic pipeline of a hydroelectric power station in a mountainous ground, a tilt shaft excavator is carried to a tilt shaft excavation position of an already constructed horizontal shaft, and this tilt shaft excavator is used. After tilting upwards and facing the inclined shaft starting point of a certain depth previously excavated above the horizontal shaft, the inclined shaft excavator is started to excavate the inclined shaft from within the inclined shaft starting port. However, it takes a lot of time and effort to prepare for starting up a tilt excavator using a pulley or a winch at the time of starting, and it is also dangerous. However, there is a problem that the work of removing pulleys, winches, etc. is necessary, and the work becomes unavoidable.
[0003]
In order to solve such problems, the applicants of the present application have developed a starter for an inclined shaft excavator as described in JP-A-8-189285. This tilt shaft excavator starting device is provided with a tilting frame that can be raised and lowered on a horizontal frame, and after tilting the horizontal frame with the tilt frame excavator mounted on the tilt frame, the tilt frame is tilted. The gantry is configured to stand up with a jack up to an angle oriented in the direction of excavation of the tilt shaft and to face the starting tilt shaft, and then the tilt excavator is started along the tilting platform.
[0004]
[Problems to be solved by the invention]
However, a horizontal frame is fixed at the tilt shaft excavation position, and the tilt frame on the horizontal frame is erected obliquely upward so that the tilt shaft excavator on the tilt frame is previously installed at the upper portion of the horizontal shaft at the tilt shaft excavation position. In order to make it face the inclined shaft starting point with a fixed depth, the wall where the horizontal shaft and the inclined shaft starting point intersect is cut off obliquely along the movement trajectory of the tilting frame and It is necessary to provide a space part that allows the tilting stand to stand up from the horizontal pit to the inclined shaft start opening along the inclined wall part by forming the inclined wall part directed obliquely downward. Since the formation is usually performed by breaking the pit wall by blasting, it is difficult to cut to the planned size, and the space becomes inevitably large, and when the tilting stand is raised, the tip surface of the tilting stand and Between the inclined wall Between it will occur.
[0005]
If this gap exists, after the tilting platform is directed to the tilt shaft start port, the segments are sequentially installed on the tilting platform on the rear side of the tilt shaft excavating machine, and the reaction force of the propulsion jack is supported on the segment. When the shaft is entered into the shaft, and the shaft is excavated from the shaft, the segment cannot be installed in the gap, and the presence of this space allows the operator to drill the shaft from the tilting frame. It is difficult to secure a safe passage when entering the aircraft.
[0006]
For this reason, the steel shaft is bridged between the tilt shaft and the tip of the tilting frame, but this bridging work has a narrow working space in the horizontal pit on the front side from the tilting frame, and in addition, the steel material in the tilt shaft start port. To install equipment such as cranes and winches, it is time-consuming and requires removal work. Not only is the work efficiency extremely low, but it is also very dangerous because the work is performed at a high place.
[0007]
On the other hand, as a method of eliminating the gap portion, after forming the inclined wall surface portion in the pit wall portion where the horizontal pit and the inclined shaft start point intersect by blasting, the tilting base is attached so as to be joined to the surface of the inclined wall surface portion. Although it is conceivable to manufacture, the construction period will be greatly delayed, and therefore it is necessary to manufacture the tilting base in advance.
[0008]
The present invention has been made in view of the problems as described above, and the object of the present invention is to stand the tilting stand upright on the tilting stand without requiring bridging work for the gap by an operator. Start of a shaft excavator that allows the bridge to be automatically bridged to the gap after the shaft excavator is placed at the start of the shaft. The method and its To provide the equipment.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the tilt excavator of the present invention is started. Method As described in claim 1, the inclined shaft excavator is started obliquely upward from the horizontal shaft. On the occasion A horizontal frame fixed to the bottom of the horizontal pit, superimposed on the horizontal frame, the rear end of which is pivotally attached to the rear end of the horizontal frame, and an inclined excavator is mounted And a tilting means for raising and lowering the tilting frame with respect to the horizontal frame, and the tilting frame Multiple, in parallel and each independently It is composed of an extending member that is built in such a manner that it can protrude forward from the tip of the tilting frame. A method of starting a tilt excavator toward a tilt shaft to be excavated by using a starting device, wherein the tilting excavator mounted on the tilt excavator is moved in a direction of the tilt shaft to be excavated by the tilt excavator. The tilting stand is raised until the tip surface of the tilting frame is opposed to the upper end of the inclined wall surface connected to the inclined lower end of the opening of the tilt shaft through a gap. Each extending member protrudes forward in accordance with the uneven surface of the upper end portion of the inclined wall surface portion, and the front end surfaces of these extending members are extended to the upper end portion of the inclined wall surface portion in the width direction of the lower inclined end of the inclined shaft start opening. The tip of each extending member is fixed by driving the anchor into the rock of the inclined wall surface, and in this state, the inclined shaft excavator is fixed to the gap between the inclined wall surface and the tilting frame. While sliding on the tilting base and each extending member To start toward the inclined shaft start opening It is characterized by that.
[0010]
In addition, the tilting excavator starting device Is Claim 2 As described, a tilting excavator starting device for starting a tilt excavator obliquely upward from a horizontal pit, a horizontal frame fixed to the bottom of the horizontal pit, and a horizontal frame on the horizontal frame A tilting base that is superposed and pivotally attached to the rear end of the horizontal frame and mounts a tilt excavator, and undulation means for raising and lowering the tilting frame with respect to the horizontal frame A plurality of the tilting bases in parallel, and extending members that are arranged in parallel and can be protruded forward from the front ends of the tilting bases, and the front end surfaces of these extending members are open to the inclined shaft opening. It comprises an anchor that fixes the tip of the extending member to the rock surface of the inclined surface portion when it is brought into contact with the upper end portion of the inclined wall surface portion connected to the downward inclined end. It is characterized by that.
[0011]
[Action]
After fixing the horizontal frame at the inclined shaft excavation position in the horizontal shaft, when the tilting frame installed on the horizontal frame is raised obliquely upward, the tip of the tilting frame is positioned at the start of the horizontal and vertical shafts. It moves while facing the inclined wall surface part formed in the pit wall part that intersects with the gap, and stops when it stands up to a predetermined angle directed in the direction of the digging of the pit shaft. In this state, the tip surface of the tilting frame is opposed to the upper end of the inclined wall surface connected to the tilted lower end of the inclined shaft starting port, and the inclined shaft excavator on the tilting frame faces the inclined shaft starting port. In addition, if a fall-preventing stand is interposed between the inclined bottom surface of the tilting stand that stands upright and the horizontal pit, the tilting stand with the tilt excavator mounted on the tilting stand will be prevented from falling unexpectedly and oriented at a predetermined angle. In this state, it can be supported more stably.
[0012]
After this state, the extending member built in the tilting frame is caused to protrude forward from the tip of the tilting frame, and the front end surface (front end surface) of the extending member is brought into contact with the upper end of the inclined wall surface part. Then, the gap between the tip of the tilting cradle and the upper end of the inclined wall surface is bridged by this extending member, and in this state, the tip of the extending member is fixed to the upper end of the inclined wall surface by an anchor or the like.
[0013]
In this way, after the extending member is fixed in a bridged state in the gap between the tip of the tilting frame and the upper end of the inclined wall surface part, the inclined shaft excavator on the tilting frame is started. At this time, a propulsion reaction force pedestal is installed in advance on the rear side of the horizontal frame, and the propulsion reaction force of the inclined shaft excavator is received by the propulsion reaction force support, and the shaft excavation is performed every time a certain distance is propelled. The inclined shaft excavator is passed over the extending member from the tilting frame while the segment is interposed between the machine and the propulsion reaction force receiving table, and the inclined shaft is excavated by the inclined shaft excavator in the extending direction of the inclined shaft starting port.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A specific embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 4, a starter of a tilt shaft excavator A is a horizontal frame 1 fixed to the bottom surface of a tilt shaft excavation position in an existing horizontal shaft B. And a tilting mechanism in which the rear end portion is pivotally attached to the rear end portion of the horizontal frame 1 and is mounted on the horizontal frame 1, and the tilt excavator A is mounted thereon. The gantry 2, hoisting means 3 for raising and lowering the tilting gantry 2, and moving in the length direction of the tilting gantry 2 by the pushing means 4 such as a jack or a winch, etc. It is comprised from the rod-shaped extending | stretching member 5 which has the fixed length which can protrude toward the front.
[0015]
The structure of the starting device will be described in more detail. The horizontal frame 1 is formed in a plane rectangular shape, and wheels 1a traveling on rails R laid on the horizontal pit B can be rotated at both front and rear sides thereof. While being pivotally supported, the tilting frame 2 disposed on the horizontal frame 1 is also composed of a rectangular frame. As shown in FIG. 5, the tilting frame 2 has a width that is substantially equal to the outer diameter (lateral width) of the inclined shaft excavator A and a length that is slightly longer than the length of the inclined shaft excavator A. The cambers 2a formed on the polygonal surface or the concave arc surface 2b whose upper surface is along the lower peripheral surface of the inclined shaft excavator A are integrally fixed to both side portions at appropriate intervals in the length direction. The tilt shaft excavator A is configured to be slidably mounted in the front-rear direction with the excavation part A1 side of the cutter or the like facing forward.
[0016]
Further, as shown in FIG. 5, the tilting frame 2 includes a plurality of fixed rectangular cylinders 6 having substantially the same length as the tilting frame 2 at regular intervals in the width direction. The front end surface (front end surface) of the tilting base 2 is aligned with the length direction of the tilting gantry 2 and fixed in a parallel state. These fixed rectangular tubes 6 are fixed in an embedded state in the camber 2a so that the upper surface thereof is flush with the upper surface of the camber 2a, and the lower peripheral surface of the inclined shaft excavator A is mounted together with the camber 2a. However, the upper surface may be entirely embedded in the camber 2a without matching the upper surface of the camber 2a, or at least the upper end of the camber 2a protrudes from the upper surface. The inclined shaft excavator A may be received by the upper surface of the fixed rectangular cylinder 6 without the camber 2a receiving the inclined shaft excavator A.
[0017]
The rod-shaped extending member 5 made of a steel square pipe or a square bar having a length about half that of each fixed cylinder 6 is slidably inserted into the front half of each fixed square cylinder 6. As shown in FIG. 4, a hydraulic jack 4A, which is an extruding means 4 for the stretching member 5, is fixed in the rear part. . The front end surface of the piston rod 4a of each hydraulic jack 4A is brought into contact with the rear end surface of the corresponding extending member 5, and the extending member 5 is extended by extending the piston rod of the hydraulic jack 4A. The fixed rectangular cylinder 6 is configured to protrude independently from the front end of the opening. The piston rod 4a of the hydraulic jack 4A is integrally connected to the rear end of the extending member 5, and the piston rod 4a is expanded and contracted so that the extending member 5 can be protruded and retracted from the opening front end of the fixed rectangular tubular body 6. It may be left.
[0018]
A bracket 2c projects from the lower surface of the rear end portion of the tilting base 2 integrally provided with a plurality of fixed rectangular cylinders 6 in which the extending members 5 are slidably housed. A tilting base 2 is pivotally attached to a horizontal base frame 1 so as to be able to stand upwards by a pivot 1c with a bracket 1b protruding from the rear end surface of the horizontal base frame 1. Further, the lower ends of the laterally long rectangular posture holding frames 7 and 7 are fixed to both side ends of the front half of the tilting frame 2, and these postures that protrude upward from the both side ends of the tilting frame 2 are held. The opposed inner surfaces of the frames 7 and 7 are received from the circumferential surfaces on both sides to the lower circumferential surface of the front half of the inclined shaft excavator A. On the concave arc surface Forming.
[0019]
Further, the horizontal frame 1 is formed wider than the tilting frame 2, and when viewed from the plane, the both side ends thereof are the thicknesses of the posture holding frames 7 and 7 from the both side end surfaces of the tilting frame 2 as shown in FIG. 4. As shown in FIG. 3, the projecting side end portions and the posture holding frames 7 and 7 integrated with the tilting frame 2 are connected via a link mechanism 8 and the link. The mechanism 8 and both end portions of the horizontal frame 2 are connected by a hydraulic jack 9 to constitute the hoisting means 3 of the tilting frame 2. Specifically, the link mechanism 8 is composed of a pair of links 8a and 8b pivotably attached to each other 8c, and the end of one link 8a is pivotally attached to the rear end surface of the posture holding frame 7 so as to be rotatable 8d. The other link 8b is pivotally attached 8e to the upper surface of both front ends of the horizontal frame 1, and the outer bottom of the hydraulic jack 9 is pivotally attached to the pivot 8e. In addition, the piston rod 9a of the hydraulic jack 9 is pivotally attached 9b to the central portion of the one link 8a, and the piston rod 9a is expanded and contracted so that the tilting frame 2 is raised and lowered via the link mechanism 8. ing. Note that a locking member (not shown) for preventing the tilt excavator A from sliding down when the tilt mount 2 stands up may be provided at an appropriate position of the tilt mount 2 or the posture holding frame 7.
[0020]
Further, as the raising / lowering means 3, in addition to the link mechanism 8 and the hydraulic jack 9, for example, a means for raising and lowering the tilting gantry 2 by screw feeding by rotation like a screw mechanism may be adopted. . Further, without adopting the link mechanism 8, the hoisting means 3 in which an expansion / contraction mechanism such as a hydraulic jack 9 is directly connected between the horizontal frame 1 and the tilting frame 2 may be configured.
[0021]
10 is a propulsion reaction force pedestal that supports the rear end surface of the inclined shaft excavator A on the tilting cradle 2 when the tilting cradle 2 is started up and tilted, and the horizontal installation frame portion 10a and the tilt receiving frame portion. 10b and the inclined reinforcing frame portion 10c. The inclined surface of the inclined receiving frame portion 10b is formed on a surface substantially orthogonal to the center line of the inclined shaft C to be excavated. Reference numeral 11 denotes a plurality of propulsion jacks fixed to the inner peripheral surface of the rear end portion of the inclined shaft excavator A. The spreader 11a attached to the rod end is received on the inclined receiving frame portion 10b of the propulsion reaction force base 10. It is configured to make it. The propulsion jack 11 may be interposed between the rear end surface of the inclined shaft excavator A and the inclined receiving frame portion 10b of the propulsion reaction force pedestal 10 without being attached to the inclined shaft excavator A. Further, instead of the propulsion jack 11, propulsion means such as a screw mechanism may be employed.
[0022]
Reference numeral 12 denotes a fall prevention stand that is interposed between the bottom surface of the tilt mount 2 and the bottom surface of the horizontal pit B when the tilt stand 2 is raised to a predetermined angle. The lower end of the horizontal well B is installed on the bottom surface of the horizontal pit B so as to straddle the horizontal frame 1 and the rear surface is inclined at substantially the same angle as the inclined shaft excavation angle. As shown in FIGS. 2 and 6, the bottom surface (lower surface) of the tilting frame 2 is formed so as to be received up to a predetermined angle by the inclined frame portion 12a.
[0023]
Further, a plurality of bolt holes 12b are formed on both sides of the inclined frame portion 12a of the fall-preventing gantry 12, and a plurality of bolt holes 12b facing both the bolt holes 12b are also formed at both end portions of the tilting gantry 2. A plurality of bolt holes 2d are formed, and the bolt holes 2d and 12b are connected by a bolt / nut 13.
[0024]
Next, a method of excavating the inclined shaft C by starting the inclined drive toward the inclined shaft C to be excavated using the starting device of the inclined shaft excavator A configured as described above will be described. First, the horizontal frame 1 provided with the tilting frame 2 is run on the rail R laid on the bottom surface of the existing horizontal pit B and stopped at the inclined digging position. At this time, the tilt excavator A may be placed on the tilting frame 2 that is folded in a horizontal state on the horizontal frame 1 and transported to the tilt shaft excavation position. The inclined shaft excavator A may be placed thereon. Further, the inclined shaft excavator A may be fixed on the tilting frame 2 with a wire or the like, and the fixing may be released at the start.
[0025]
A horizontal excavation position in the existing horizontal pit B has a horizontal length at which the horizontal frame 1 can be temporarily installed from the intersection of the horizontal pit B and the pit C to be excavated in the forward extension direction of the horizontal pit B. A pit B 'is provided. The horizontal pit B 'is formed so that the bottom surface is flush with the horizontal pit B and smaller than the diameter of the horizontal pit B, and the upper circumference in the connecting portion between the horizontal pit B and the horizontal pit B'. Diagonally upward inclined shaft opening C having a depth and a diameter into which the front end portion of inclined shaft excavator A can be inserted into the wall surface obliquely forward, which is the excavation direction of inclined shaft C. ₁ Is excavated and formed. Furthermore, this inclined shaft start C ₁ The pit wall between the horizontal pit B and the horizontal pit B 'where the level difference is generated via the horizontal pit, that is, the horizontal pit B' and the slope pit C ₁ Diagonal excavation port C from the upper peripheral wall of the rear end of horizontal pit B ' ₁ An inclined wall surface portion D that is inclined obliquely upward toward the lower inclined end of the opening is formed.
[0026]
The inclined wall surface portion D is provided along the movement trajectory of the tilting frame 2 so that there is a gap F between the inclined wall excavator A and the tip surface of the tilting frame 2 mounted thereon. Shaft shaft C facing wall D ₁ The lower part of the horizontal shaft B to the tilt shaft C ₁ It is formed in the space E that allows the tilting cradle 2 to stand up. In addition, when excavating the inclined shaft C from the middle portion of the horizontal well B, the front extension of the horizontal well B can be used as the horizontal well B ', and when there is no extension of the horizontal well B, the horizontal frame 1 Drill a horizontal well B 'having a length approximately equal to the length of In addition, inclined shaft start C ₁ A pit 14 for installation of the propulsion reaction force receiving base 10 is excavated on the bottom surface of the horizontal pit B on the downward extension line.
[0027]
As shown in FIG. 2, the horizontal frame 1 of the starting device that has traveled to the excavation position of the shaft is fixed at that position by connecting its front end to a fixed anchor 17 with a pin 16 via a fixing hardware 15, Further, a liner 18 is interposed between the lower surface of the rear end portion of the horizontal frame base 1 and the bottom surface of the horizontal pit B to prevent the horizontal frame base 1 from tilting in the lateral direction. Before fixing the horizontal frame base 1 to the inclined shaft excavation position, the horizontal frame base 1 is inserted into the horizontal well B ', and the propulsion reaction force receiving base 10 is installed in the pit 14 in this state. Then, after fixing the propulsion reaction force receiving base 10, the horizontal frame base 1 is moved backward to the inclined excavation position and fixed.
[0028]
After fixing the horizontal frame 1 in this way, when the rod of the hydraulic jack 9 of the hoisting means 3 that connects the horizontal frame 1 and the tilting frame 2 folded thereon is extended, the link mechanism 8 The tilting frame 2 is rotated upward about the rear end pivoting portion 1c via the shaft, and the inclined shaft starting port C ₁ The lower part of the space E is inclined from the upper peripheral wall of the rear end of the horizontal pit B ' ₁ It stands up while moving along the inclined wall surface D connected to the lower inclined end of the opening. The upright excavator A placed on the camber 2a of the tilting pedestal 2 tends to slide backward by this standing, but it is moved backward by a locking member (not shown) provided on the tilting pedestal 2. Sliding (preventing sliding away from the locking member to the front side) can be prevented, or the spreader 11a of the propulsion jack 11 is brought into contact with the inclined receiving frame portion 10a of the propulsion reaction force receiving base 10. Stop by letting.
[0029]
The tilt mount 2 stands up to a certain angle and is directed in the direction of the tilt shaft C to be excavated by the tilt shaft excavator A, and the tip surface (front end surface) of the tilt mount 2 is the tilt shaft start port C. ₁ When the inclined shaft excavator A on the tilting frame 2 faces the upper end of the inclined wall portion D connected to the inclined lower end of the opening through the gap F and faces the inclined shaft starting port, The operation of the hydraulic jack 9 is stopped, and an anti-falling base 12 is interposed between the bottom surface of the tilting tilting base 2 and the bottom face of the horizontal pit B, and the bottom surface of the tilting base 2 is received by the tilting frame portion 12a. The inclined frame portion 12a and the tilting frame 2 are fixed together by bolts and nuts 13, and the lower end of the fall-preventing frame 12 is fixed by driving an anchor into the bottom surface of the horizontal pit B. In this state, the tilting base 2 reliably maintains the tilt angle and is prevented from falling in the front-rear and left-right directions.
[0030]
After this state, the piston of the hydraulic jack 4A which is the pushing means 4 fixed in the rear part of the plurality of fixed rectangular cylinders 6 arranged in parallel in the width direction of the camber 2a of the tilting base 2 at small intervals. By extending the rods 4a, the extending members 5 provided in the respective fixed rectangular cylinders 6 are protruded forward from the distal ends of the respective fixed rectangular cylinders 6, and the distal end surfaces of these extending member 5 are set to the inclined wall surfaces. At the upper end of part D ₁ These extending members 5 are cross-linked in the gap F between the inclined wall surface portion D and the tilting pedestal 2 by contacting along the width direction of the lower inclined end of the opening. And the front-end | tip of each extending | stretching member 5 contact | abutted to the upper end part of the inclined wall surface part D is fixed by driving the anchor 20 into the rock mass of this inclined wall surface part D.
[0031]
In this way, after the extending member 5 is fixed in a bridged state in the gap F between the tip of the tilting base 2 and the upper end of the inclined wall portion D, the propulsion reaction force is received by the propulsion reaction force receiving base 10 and the propulsion jack 11 is extended. As the inclined shaft excavator A slides on the concave arc surface of the camber 2a of the tilting frame 2, the inclined shaft start opening C ₁ Start toward. At this time, the inclined shaft excavator A is controlled by the posture holding frame 7 projecting from the both ends of the first half of the tilting frame 2 while the horizontal movement is restricted, and the inclined shaft start C ₁ Promote accurately toward.
[0032]
When the propulsion jack 11 is propelled for one stroke, the propulsion jack 11 is contracted sequentially, and a segment S for one ring is formed between the spreader 11a and the inclined receiving frame portion 10b of the propulsion reaction force receiving base 10. By interposing and receiving the propulsion reaction force in the segment S, the propulsion jack 11 is again extended to advance the inclined shaft excavator A, and by repeating this operation, the front end portion of the inclined shaft excavator A is connected to the extending member. 5 ₁ Enter inside.
[0033]
Diagonal shaft C ₁ When the inclined shaft excavator A advances to a position where the front end excavating portion A1 of the inclined shaft excavating machine A comes into contact with the face of the shaft, the propulsion jack 11 is extended while rotating the cutter provided on the front end surface of the excavating portion A1. The excavation of the inclined shaft C is started. At this time, the inclined shaft excavator A has grippers A5 and A6, which will be described later, provided on the trunk portion of the inclined shaft excavator C. ₁ Since the gripper A5, A6 cannot be crimped to the wall of the excavation shaft because it has not reached the inside, when the excavator A rotates by rotating the cutter of the excavation shaft A, the excavation machine A rolls due to the rotational reaction force. The inclined shaft excavator A is fixed to the tilting frame 2 so as to be movable back and forth with a wire or the like and not rotatable. In this way, the inclined shaft excavator A excavates the inclined shaft C while the entire length of the inclined shaft C ₁ If it becomes the state immersed in the inclined shaft B, the starting device, that is, the horizontal frame 1 provided with the tilting frame 2, the propulsion reaction force receiving frame 10, the fall prevention frame 12 and the like are removed.
[0034]
As is well known, the inclined shaft excavator A has a front trunk A2, a middle trunk A3 and a rear trunk A4 having a drilling section A1 such as a cutter at the front end, and the front and rear trunks A2 and A4 can be expanded and contracted via the middle trunk A3. And a front gripper A5 and a rear gripper A6 that are detachably press-bonded to the wall surface of the inclined shaft C excavated in the front and rear trunks A2 A4. Then, with the rear gripper A6 being crimped to the excavation wall surface and supporting the entire excavator, the inclined shaft C is advanced while the front trunk A2 is extended forward. While the rear gripper A6 is released from the excavation ground, the rear cylinder A4 is pulled toward the front cylinder A2, and the assembly of the segment S in the rear part of the inclined shaft excavator A is repeated while excavating the inclined shaft C. It is going. Inclined shaft start C ₁ If the length of the inclined shaft excavator A is longer than the length of the inclined shaft excavator A, when the inclined shaft excavator A is on the starting device, rolling does not occur. From the start of excavation, the front gripper A5 and the rear gripper A6 are connected to the tilt shaft C. ₁ Rolling can be prevented by pressing against the wall surface.
[0035]
In addition, the tip of the tilting frame 2 and the ramp C ₁ Since a plurality of extending members 5 are fixed in a cross-linked state in the gap F between the upper ends of the inclined wall surface portion D connected to the lower end of the segment, the segment S can be disposed on the extending member 5 and It is possible to secure a passage between the tilting frame 2 side and the inclined shaft excavator A side through the extending member 5.
[0036]
In the above embodiment, the hydraulic jack 4A is used as the extrusion means 4 for the extending member 5, but other means, for example, an extrusion means using a winch 41 as shown in FIG. Good. That is, the distal end of the wire 42 is connected to the lower part of the rear end of the extending member 5 which is disposed in each fixed rectangular tube 6 so as to be able to protrude from the opening front end of the fixed rectangular tube 6, and the wire 42 is fixed to the fixed angle tube 6. After spanning a sheave 43 rotatably supported at the lower edge of the opening front end of the cylinder 6, it is wound around a winch 42 installed on the horizontal pit B behind the horizontal frame 1 via a guide sheave 44. The extending member 5 may be protruded from the fixed rectangular tube body 6 by operating the winch 42 in the rewinding direction of the wire 42. In addition, a plurality of extending members 5 are arranged in parallel on the camber 2a of the tilting base 2, and a single curved plate-like extending member is projected from the tip of the tilting base 2 with a jack or the like. You may keep it.
[0037]
【The invention's effect】
As above In the present invention According to the above, the tilting frame for mounting the tilt excavator on the horizontal frame fixed to the bottom of the horizontal shaft is arranged in a superposed state, and the rear end of the tilting frame can be raised and lowered to the rear end of the horizontal frame. In the starting device pivotally attached to the tilting frame, the tilting frame is provided with an extending member that can protrude forward from the tip of the tilting frame. It is possible to easily complete the preparation for the start of the tilt excavator by disposing the tilt excavator on the horizontal mount, and to smoothly and accurately drill the tilt excavator on the tilt mount by raising the tilt mount on the horizontal mount upward. Of course, the tilting rack is equipped with an extension member that can protrude forward, so that the tilting rack can be raised and the tilting excavator can be exposed to the ramp opening. After that, this stretched member By projecting forward by an extrusion means such as a pressure jack, the end of the extending member can be brought into contact with the wall surface portion on the lower end side of the opening of the tilt shaft without any manual operation. The stretching member can be automatically and safely bridged in the gap between the opening lower end of the starting port and the tip of the tilting frame, and the arrangement of the segments on the stretching member and the tilting frame side through the stretching member; It is possible to secure a passage with the inclined shaft excavator side.
[0038]
In addition, the above A plurality of extending members are installed in parallel on the tilting frame, and each extending member can be independently protruded from the tip of the tilting frame by an extrusion means such as a hydraulic jack. Even if the front end abutting wall surface of the extending member on the lower end side is an uneven surface, each extending member can be protruded according to the uneven surface and the ends of all extending members can be reliably contacted with the opposing wall surface, The stretching member can be firmly fixed to the wall surface, and a more stable stretching structure of the stretching member can be formed.
[Brief description of the drawings]
FIG. 1 is a simplified vertical side view of a tilt excavator with a start device installed,
FIG. 2 is a side view of the starting device with the inclined shaft excavator facing the inclined shaft excavation side;
FIG. 3 is a side view of the tilting frame folded on a horizontal frame,
FIG. 4 is a simplified plan view thereof.
FIG. 5 is a simplified front view of the starting device,
FIG. 6 is a simplified side view of a state where a shaft is excavated;
FIG. 7 is a side view showing another example of the means for extruding the stretching member.
[Explanation of symbols]
1 Horizontal frame
2 Tilt base
3 Undulating means
4 Extruding means
4A hydraulic jack
5 Stretched member
6 Fixed rectangular tube
10 Propulsion reaction base
11 Propulsion jack
A inclined shaft excavator
B Horizontal pit
C inclined shaft
C ₁ Shaft shaft start
D Inclined wall
E space

Claims

When starting the inclined shaft excavator from the horizontal shaft obliquely upward, the horizontal frame fixed to the bottom surface of the horizontal shaft and the horizontal frame overlapped with the horizontal frame and the rear end of the horizontal frame A tilting base that is pivotally attached to the section and on which a tilt excavator is mounted, hoisting means for raising and lowering the tilting base with respect to the horizontal frame, and a plurality of the tilting bases in parallel, each in a single state A tilting excavator is a method of starting a tilting excavator toward a tilting shaft to be excavated using a starting device comprising an extending member that is capable of projecting forward from the tip of the tilting frame. The tilting platform mounted on the tilting means is directed to the direction of the tilting shaft to be excavated by the tilting excavator, and the tip of the tilting platform is spaced from the upper end of the inclined wall surface that is connected to the tilted lower end of the tilting shaft opening It will be in a state of facing through In this state, the extending members provided in the tilting base are projected forward according to the uneven surface of the upper end portion of the inclined wall surface portion, and the front end surfaces of these extending members are protruded from the inclined wall surface portion. The upper end is brought into contact with the gap between the inclined wall surface and the tilting frame by abutting along the width direction of the lower inclined end of the opening of the inclined shaft start port, and the tip of each extending member is anchored to the bedrock of the inclined wall surface In this state, the tilt excavator is started toward the tilt shaft opening while sliding on the tilting base and each extending member .

A tilt excavator starter for starting a tilt excavator obliquely upward from a horizontal pit, a horizontal frame fixed to the bottom of the horizontal pit, and a superposition on the horizontal frame and the rear A tilting base having an end pivotally attached to a rear end of the horizontal frame and mounting a tilt excavator, hoisting means for raising and lowering the tilting frame with respect to the horizontal frame, and the tilting frame A plurality of extending members arranged in parallel and individually so as to be able to protrude forward from the tip of the tilting frame, and the leading end surfaces of these extending members are connected to the tilted lower end of the inclined shaft start opening. An inclination excavator starter comprising: an anchor that fixes the tip of the extending member to the rock surface of the inclined surface when contacting the upper end of the inclined wall .