JP2004068319A

JP2004068319A - Pipe installation method and pipe installation device

Info

Publication number: JP2004068319A
Application number: JP2002226259A
Authority: JP
Inventors: Isao Tsuruki; 鶴木　勇夫; Senji Ishizuka; 石塚　千司; Yasushi Maruta; 丸田　　靖
Original assignee: Fukuda Corp
Current assignee: Fukuda Corp
Priority date: 2002-08-02
Filing date: 2002-08-02
Publication date: 2004-03-04
Anticipated expiration: 2022-08-02
Also published as: JP4024104B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe installation technique excellent in practical use in which a pipe can be installed over a long distance even if its inner diameter is small. <P>SOLUTION: A horizontal hole 2 is formed in a natural ground by an excavator 1, and a plurality of pipes 3, 4 are arranged in the hole 2 to install a pipe body 5 formed by connecting the pipes 3, 4 in the hole by the technique. The plurality of pipes 3 provided with the excavator 1 at the forward side and a thrusting jack 15 at the rearward side, are installed. The pipe 4 formed by assembling a segment 8 is arranged in the space 7 formed at the rearward of the thrusting jack 15 by contraction. Subsequently, the thrusting jack 15 is stretched and the assembled pipe 4 supported by a reaction receiver is pushed to thrust the forward pipe 3 of the thrust jack 15 and the excavator 1. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、下水管等の管体設置方法及び管体設置装置に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
掘削装置（シールド機）を用いた管体設置方法として、シールド工法と推進工法とが提案されている。
【０００３】
ところで、シールド工法と推進工法には、次の長所及び短所がある。
【０００４】
シールド工法は長距離に亙って管体を設置することができるが、ある程度以上径大な内径を有する管体しか設置できない。
【０００５】
図１，２に基づいて説明すると、シールド工法は、掘削装置４０の後部にシールドジャッキ４１を設け、このシールドジャッキ４１を収縮して形成した空間部４２でセグメント４３を組み立てることにより管材４４を形成し、続いて、この形成した管材４４を前記収縮したシールドジャッキ４１が押動することで反力により掘削装置４０を推進させ、これを繰り返す方法である。尚、図中符号５１は廃土ポンプ、５２は廃土管、５３は切羽に泥水を供給する導泥管、５４は導電ケーブル、５５は制御ケーブル、５６は導泥管を延長する為の延長管、５７はその他の管内設備を搭載した後続台車である。
【０００６】
このシールド工法は、掘削装置４０の推進抵抗が一定で増大せず、よって、多数の管材４４を形成していくことで長距離に亙って管体を配置することができる。しかし、既に形成した管材４４の内部に、セグメント４３を組み立てる為の組立設備や掘削装置４０を作動する為の作動設備等の管内設備、具体的には、エレクター４６（セグメント４３を保持する装置）、セグメント台車４７、パワーユニット４８、トランス４９、ケーブルリール５０等を全て配設しなければ前記セグメント４３の組み立てや掘削装置４０による掘削を行えない為、管材４４の内径は、これら各管内設備を収納でき且つセグメント４３を掘削装置４０の後方まで運搬できる径（即ち、管内設備の為のスペースとセグメント４３を運搬する為のスペースを確保できる径）でなければならず、必然的に径大となってしまう。
【０００７】
従って、シールド工法では、管体の内径は少なくとも１２００ｍｍ程度は必要である。
【０００８】
一方、推進工法は径小な管体でも設置できるが、長距離に亙って管体を設置することができない。
【０００９】
具体的に説明すると、推進工法は、掘削装置の後部に管材を配置し、この管材の後部に推進ジャッキを設け、推進ジャッキの伸長によって掘削装置及び管材を推進し、続いて、推進ジャッキを収縮し、この推進ジャッキの収縮によって形成した空間部に管材を配設し（この管材は、組み立て不要なものでも、配設する際にセグメントを組み立てる必要があるものでも、どちらでも採用することができる。）、続いて、推進ジャッキの伸長によって該新たに配設した管材，既に配設した管材及び掘削装置を推進せしめる方法である。
【００１０】
従って、推進工法では、管材の内部は、掘削装置を作動せしめる為の作動設備や掘削装置の掘削によって生じた廃土を排出する為のコンベア等を設けられる程度のスペースで十分であり（即ち、セグメントを運搬するスペースは不要である）、径小な管材を採用することができる。しかし、推進距離が長くなると、推進する管材が増える分、それだけ地山との摩擦抵抗が増大してしまう。
【００１１】
従って、推進工法では、管材の設置距離に限界があり、現状では１０００ｍ程度の施工実績が最大となっている。
【００１２】
また、推進工法の改良例として、所定数の管材ごとに中押しジャッキを設け、この中押しジャッキの伸縮を利用することによりシャクトリムシの動きのように複数の管材ずつを順次推進することで該推進する管材と地山との摩擦抵抗の増大を制限する所謂中押し工法が提案されている。
【００１３】
しかし、中押し工法は、多数のジャッキ（中押しジャッキ及び推進ジャッキ）を制御して伸縮しなければならない為、厄介でコスト高になるという問題点や、全体の動きがシャクトリムシ状である為、管材の設置速度が遅いという問題点がある。
【００１４】
本発明は、上記現状に鑑みて発明するもので、内径が径小な管体でも長距離に亙って設置できる実用性に秀れた管体設置技術を提供するものである。
【００１５】
【課題を解決するための手段】
添付図面を参照して本発明の要旨を説明する。
【００１６】
掘削装置１で地山に横穴２を穿設し、この横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する方法であって、前方に掘削装置１を設け且つ後方に推進ジャッキ１５を設けた複数の管材３を配設し、この推進ジャッキ１５の収縮により該推進ジャッキ１５の後方に形成される空間部７にセグメント８を組み立てて形成した管材４を配設し、続いて、該推進ジャッキ１５を伸長して反力受けで支持された前記組み立てた管材４を押圧することで該推進ジャッキ１５の前方の管材３及び掘削装置１を推進させることを特徴とする管体設置方法に係るものである。
【００１７】
また、掘削装置１で地山に横穴２を穿設し、この横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する方法であって、掘削装置１と該掘削装置１の後方に連設された複数の管材３とを第一推進ジャッキ１４の押動により推進せしめて複数の管材３を横穴２に配設した後、この第一推進ジャッキ１４と上記で配設した複数の管材３との間に第二推進ジャッキ１５を配設し、この第二推進ジャッキ１５の収縮により該第二推進ジャッキ１５の後方に形成される第一推進ジャッキ１４との間の空間部７にセグメント８を組み立てて形成した管材４を配設し、続いて、該第二推進ジャッキ１５を伸長して反力受けで支持された前記組み立てた管材４を押圧することで前記第二推進ジャッキ１５の前方の複数の管材３及び掘削装置１を推進させることを特徴とする管体設置方法に係るものである。
【００１８】
また、請求項２記載の管体設置方法において、掘削装置１を作動する為の設備やセグメント８を組み立てる為の設備等の管内設備を第二推進ジャッキ１５の前方の複数の管材３の内部に設けたことを特徴とする管体設置方法に係るものである。
【００１９】
また、請求項２，３いずれか１項に記載の管体設置方法において、第一推進ジャッキ１４の押動により複数の管材３を配設した後、この第一推進ジャッキ１４と該複数の管材３との間に第二推進ジャッキ１５が内装された作業筒１１を配設し、この作業筒１１の内部にして第二推進ジャッキ１５の収縮により形成される第一推進ジャッキ１４との間の空間部７でセグメント８の組み立てを行うことを特徴とする管体設置方法に係るものである。
【００２０】
また、請求項４記載の管体設置方法において、作業筒１１の内部にセグメント８を組み立てる為のエレクター２０を設置したことを特徴とする管体設置方法に係るものである。
【００２１】
また、請求項２〜５いずれか１項に記載の管体設置方法において、掘削装置１での掘削により発生した排土を泥状態として該掘削装置１の後方に連設された複数の管材３・４の内部を経由して地上に搬送する排泥管１２を設けたことを特徴とする管体設置方法に係るものである。
【００２２】
また、掘削装置１で地山に横穴２を穿設し、この横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する方法であって、下記▲１▼の工程を行い、続いて、下記▲２▼の工程を繰り返して前記掘削装置１の後方に第一管体６を形成し、続いて、下記▲３▼，▲４▼の工程を順不順で行い、続いて、下記▲５▼の工程を行い、続いて、下記▲６▼の工程を繰り返して前記第一管体６の後方に第二管体９を連設することで地山に複数の管材３・４が連設された管体５を設置することを特徴とする管体設置方法に係るものである。
記
▲１▼　地山に穿設された立坑１３に掘削装置１と第一推進ジャッキ１４とを設け、第一推進ジャッキ１４の押動により掘削装置１を推進せしめて該掘削装置１を立坑１３の側壁から地山に導入し、続いて、第一推進ジャッキ１４を収縮して該第一推進ジャッキ１４と掘削装置１との間に間隙を形成し、続いて、この間隙に管材３を配設し、続いて、前記収縮した第一推進ジャッキ１４を伸長押動せしめることにより管材３及び掘削装置１を推進せしめる工程
▲２▼　第一推進ジャッキ１４を収縮して該第一推進ジャッキ１４と管材３との間に間隙を形成し、続いて、この間隙に新たな管材３を配設し、続いて、前記収縮した第一推進ジャッキ１４を伸長押動せしめることにより配設した新たな管材３，既に推進している管材３及び掘削装置１を推進せしめる工程
▲３▼　第一管体６の管材３の内部に掘削装置１を作動する為の設備やセグメント８を組み立てる為の設備等の管内設備を設ける工程
▲４▼　第一管体６の後方に第二推進ジャッキ１５が内装された作業筒１１を設ける工程▲５▼　作業筒１１の内部において第二推進ジャッキ１５を収縮し、この第二推進ジャッキ１５の収縮により形成した空間部７でセグメント８を組み立てる為の設備を用いてセグメント８を組み立てることにより管材４を形成し、続いて、第二推進ジャッキ１５を伸長して前記組み立てた管材４を押圧せしめることにより第一管体６の管材３，掘削装置１及び作業筒１１を推進せしめる工程
▲６▼　第二推進ジャッキ１５を収縮して該第二推進ジャッキ１５とセグメント８を組み立てて形成した管材４との間に空間部７を形成し、続いて、この空間部７で新たセグメント８を組み立てることにより管材４を形成し、続いて、前記収縮した第二推進ジャッキ１５を伸長して前記組み立てた管材４を押圧せしめることにより第一管体６の管材３，掘削装置１及び作業筒１１を推進せしめる工程
【００２３】
また、請求項１〜７いずれか１項に記載の管体設置方法において、内径１２００乃至８００ｍｍの管体５を設置することを特徴とする管体設置方法に係るものである。
【００２４】
また、掘削装置１で地山に横穴２を穿設し、この横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する管体設置方法であって、横穴２に設置される管体５は、先端側の所定区間は、掘削装置１と該掘削装置１の後方に連設された複数の管材３とを推進ジャッキ１５の押動によって推進することにより配設される第一区間であり、この第一区間の後方は、前記推進ジャッキ１５の収縮により該推進ジャッキ１５の後方に形成される空間部７にセグメント８を組み立てて形成した管材４を順次設置することで配設される第二区間であることを特徴とする管体設置方法に係るものである。
【００２５】
また、地山に穿設した横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する管体設置装置であって、先端を掘削する掘削部と、この掘削部の後方に連設された複数の管材３と、この複数の管材３の後方に連設され該複数の管材３及び前記掘削部を押動する推進ジャッキ１５と、該推進ジャッキ１５の後方に連設された複数の管材４と、前記掘削部の後方に連設された複数の管材３の内部に設けられ掘削部を作動したりセグメント８を組み立てたりする為の管内設備とから成ることを特徴とする管体設置装置に係るものである。
【００２６】
また、地山に穿設した横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置する管体設置装置であって、先端を掘削する掘削部と、横穴２の始端の支承部により支持される第一推進ジャッキ１４によって推進される管材３と、前記第一推進ジャッキ１４に支持されて前記管材３を推進させる第二推進ジャッキ１５と、前記第一推進ジャッキ１４により推進される管材３の内部に配設され前記掘削部を作動する為の設備と、同じく前記第一推進ジャッキ１４により推進される管材３の内部に配設され第二推進ジャッキ１５の推進により該第二推進ジャッキ１５と前記第一推進ジャッキ１４との間に形成される空間部７でセグメント８を組み立てることにより該空間部７に管材４を配設する設備とから成ることを特徴とする管体設置装置に係るものである。
【００２７】
【発明の作用及び効果】
地山に対して推進せしめられるのは、掘削装置１と該掘削装置１の後方に連設された所定数の管材３だけであるから、管体５を形成する為の管材３・４の配設延長が長くなっても管材３等の推進による摩擦抵抗の増大は制限され、従って、長距離に亙って掘削装置１及び前記所定数の管材３を推進することができる。
【００２８】
また、前記推進する所定数の管材３の後方は、セグメント８を組み立てて形成した管材４を配設するから、シールド工法と同様、長距離に亙って管体５を設置することができる。
【００２９】
また、セグメント８を組み立てて形成した管材４を配設する際、掘削装置１の後方に前記所定数の管材３が既に存在しているから、この所定数の管材３の内部を利用して例えばセグメント８を組み立てる為の設備や掘削装置１を作動する為の設備（パワーユニット２２等）を該所定数の管材３の内部に設けることにより、セグメント８を組み立てる場所までの該セグメント８を運搬する為のスペースを良好に確保することができ、通常のシールド工法では配設できないような内径が径小な管材４でも組み立てて横穴２に配設することができる。
【００３０】
即ち、第一推進ジャッキ１４の押動により推進せしめる複数の管材３は、通常の推進工法と同様に内径が径小な管材３を採用することができ、この管材３の後方で組み立てる管材４もセグメント８を運搬できる程度の内径が径小なものとすることができ、よって、地山に内径が径小な管体５を設置することができる。
【００３１】
本発明は上述のようにするから、内径が径小な管体でも長距離に亙って設置できる実用性に秀れた管体設置技術となる。
【００３２】
【発明の実施の形態】
図３〜８は本発明の一実施例を図示したものであり、以下に説明する。
【００３３】
本実施例は、掘削装置１で地山に横穴２を穿設し、この横穴２に複数の管材３・４を配設して該地山に該複数の管材３・４が連設された管体５を設置するものであって、横穴２に設置される管体５は、先端側の所定区間が、掘削装置１と該掘削装置１の後方に連設された複数の管材３とを推進ジャッキ１５の押動によって推進することにより配設される第一区間（所謂推進工法の様に形成する区間）であり、この第一区間の後方は、前記推進ジャッキ１５の収縮により該推進ジャッキ１５の後方に形成される空間部７にセグメント８を組み立てて形成した管材４を順次設置することで配設される第二区間（所謂シールド工法の様に形成する区間）であり、この構成により、内径が径小な管体５を長距離に亙って設置する方法である。
【００３４】
また、掘削装置１を作動する為の設備やセグメント８を組み立てる為の設備等の管内設備の多くを第一区間の管材３の内部に設ける方法を採用している。
【００３５】
また、セグメント８を推進ジャッキ１５の収縮により形成した空間部７に運搬する為のセグメント台車２１を第二区間の管材４の内部に設けて移動させる方法を採用している。
【００３６】
以下、図５〜８に基づいて更に詳述する。
【００３７】
先ず、地山に所定深さの立坑１３を穿設する。尚、既設の立坑を利用しても良い。
【００３８】
続いて、この立坑１３に推進ジャッキ１４（以下、第一推進ジャッキ１４という。）を設置する。
【００３９】
続いて、この立坑１３に掘削装置１を配置し、この掘削装置１による掘削及び前記第一推進ジャッキ１４の伸張により該掘削装置１を前記立坑１３の側壁から地山に導入することで横穴２の穿設を開始する。
【００４０】
掘削装置１は、切羽に泥水を導入しつつ掘削を行う泥水式掘削装置を採用すると良い。この泥水式掘削装置によれば、前記泥水によって切羽に泥水膜が形成される為、切羽が安定し、よって、非常に良好に地山を掘削して横穴２を穿設していくことができる。
【００４１】
尚、掘削装置１として、泥水式掘削装置以外の密閉型掘削装置や、開放型掘削装置を使用しても良い。
【００４２】
続いて、第一推進ジャッキ１４を収縮して該第一推進ジャッキ１４と掘削装置１との間に間隙を形成し、更に、この間隙に管材３を配設する。
【００４３】
この配設する管材３は、例えば、ヒューム管、鋼管、ダクタイル管、セグメントを組み立てて形成する管等、組立式の管材でも非組立式の管材でも採用して良い。
【００４４】
また、配設した管材３の内部に、前記泥水を掘削装置１に導入する導泥管１７，掘削装置１での掘削により発生した泥土を立坑１３を経由して排出する為の排泥管１２，前記排泥管１２を用いて前記泥土を排出する為の排泥ポンプ１８を設置する。
【００４５】
この排泥ポンプ１８は、設置形成する管体５の全長に対応可能な出力のものを採用する。
【００４６】
続いて、前記収縮した第一推進ジャッキ１４を伸長押動せしめることにより管材３及び掘削装置１を推進せしめる。
【００４７】
このように、第一推進ジャッキ１４の伸縮、管材３の配設、導泥管１７や排泥管１２の設置等を繰り返して地山に順次管材３を追加配設し、第一区間を形成していく（図５参照）。
【００４８】
この第一区間の長さは、該第一区間の管材３の内部に前記管内設備を配設できる程度以上、例えば５０ｍ以上に設定する。尚、第一区間が長いと地山との摩擦抵抗が増大する為、必要以上には長くしない方が良い。
【００４９】
配設する管材３を所定数として掘削装置１と所定数の管材３によって構成される第一管体６とから成る第一区間を完成させたら、第一推進ジャッキ１４を収縮し、第一区間の最後方の管材３との間の間隙に第二推進ジャッキ１５が内装された作業筒１１を配設する。
【００５０】
また、第一区間の管材３の内部に、掘削装置１を作動する為の設備やセグメント８を組み立てる為の設備等の管内設備の多くを配設する。
【００５１】
ところで、一般的なシールド工法において、管内設備は、エレクター（セグメントを保持する装置）、セグメント台車（セグメントを運搬する台車）、パワーユニット（掘削装置１を作動する為に使用する動力源、モータ等）、導電ケーブル、ケーブルリール（掘削装置１に電気を供給する為の導電ケーブルを巻回したもの）、トランス（電気の電圧をパワーユニット用に電圧を変更する為のトランス）等が使用される。本実施例では、エレクター２０は作業筒１１に配設し、セグメント台車２１は後記第二区間の管材４の内部（後記第二管体９の内部）に配設し、その他の管材設備（パワーユニット２２、トランス２３、ケーブルリール等。図４〜８において符号１０で示す。）は、第一区間の管材３の内部（第一管体６の内部）に配設する。
【００５２】
これら各管内設備は、定置式でも良いが、管材３内で移動する場合も考慮して台車上に設置した方が良い。
【００５３】
また、導電ケーブル２４は、掘削装置１の推進によって立坑１３からパワーユニット２２までの距離が長くなることに対応する為、ガイドローラ（図示省略）を付設してスムーズに移動できるように構成すると良い。更に、掘削装置１の推進に対応して導電ケーブル２４を良好に牽引できるように、該導電ケーブル２４は所定間隔を置いて管材３と補助ワイヤ（図示省略）により連結すると良い。
【００５４】
また、前記導泥管１７や前記排泥管１２を延長する為の伸縮管１９も第一区間の管材３の内部（即ち、第一管体６の内部）に配設する。
【００５５】
続いて、作業筒１１の内部において第二推進ジャッキ１５を収縮し、この第二推進ジャッキ１５の収縮により該第二推進ジャッキ１５の後方に形成した空間部７でエレクター２０等を用いてセグメント８を組み立てることにより管材４を形成する（図６参照）。
【００５６】
また、組み立てた管材４の内部において前記第一区間の管材３の内部に設けた導泥管１７や前記排泥管１２を延長せしめる。
【００５７】
続いて、第二推進ジャッキ１５を伸長して前記組み立てた管材４の先端部を押動せしめることにより第一区間の管材３（即ち、第一管体６），掘削装置１及び作業筒１１を推進せしめる。
【００５８】
続いて、第二推進ジャッキ１５を収縮して該第二推進ジャッキ１５と前記セグメント８を組み立てて形成した管材４との間に空間部７を形成し、更に、この空間部７で新たにエレクター２０等を用いてセグメント８を組み立てることにより新たな管材４を形成し、続いて、前記収縮した第二推進ジャッキ１５を伸長して前記組み立てた管材４を押動せしめることにより第一区間の管材３，掘削装置１及び作業筒１１を推進せしめる。
【００５９】
また、新たな管材４の内部において前記延長した導泥管１７や排泥管１２を延長せしめる。
【００６０】
このように、第二推進ジャッキ１５の伸縮、セグメント８の組み立てによる管材４の配設、導泥管１７や排泥管１２の延長を繰り返して地山にして前記第一区間の第一管体６の後方に順次新たな管材４を配設し、第二区間（第二管体９）を形成していく（図７参照）。
【００６１】
この第二区間の形成の際、第二推進ジャッキ１５の押動伸張によって該第二区間の管材４が横穴２内でずり動しないように第一推進ジャッキ１４で第二区間の最後方の管材４を支承しておく（この場合、第一推進ジャッキ１４が反力受けとなっている。）。更に、第二区間が所定長となることで該第二区間の管材４と地山との摩擦抵抗が増大し、前記第二推進ジャッキ１５の押動伸張によっても該第二区間の管材４（即ち、第二管体９）が横穴２内でずり動しないようになったら、前記第一推進ジャッキ１４による支承を解除して第二区間の形成を続ける（図８参照。この場合、管材４と地山との摩擦抵抗が反力受けとなっている。）。この撤去した第一推進ジャッキ１４は別の作業現場で使用する。
【００６２】
また、作業筒１１の内部で組み立てるセグメント８は、第二区間の管材４の内部に配設したセグメント台車２１を用いて順次作業筒１１の内部に補充する。
【００６３】
このようにして第二区間を形成した後は、作業筒１１の内部から第二推進ジャッキ１５を除去し、且つ、作業筒１１の内部でセグメント８を組み立てて管材４を形成することにより第一区間の管材３と第二区間の管材４とを連設して地山に管体５を設置する。
【００６４】
図中、符号２５は掘削装置１や組立設備等を制御する為の制御ケーブル、２６は作業筒１１の後端部と第二区間の先端部の管材４との間隙を閉塞するパッキン、２７はセグメント台車２１の移動をスムーズに行う為の移動路である。
【００６５】
本実施例は上述のようにするから、第一区間の後方で順次セグメント８を組み立てることにより管材４を順次形成していくことができ、これにより長距離に亙って管材３・４を配設できる実用性に秀れた管体設置方法となる。
【００６６】
また、掘削装置１を作動する為の設備やセグメント８を組み立てる為の設備等の管内設備の多くを第一区間の管材３の内部に収納して該セグメント８を組み立てを行うから、第二区間の管材４の内径は、セグメント台車２１を移動したり廃土を排出する為の排泥管１２等を設ける程度で良く、よって、第二区間の管材４として内径が径小なものを採用でき、更に、第一区間の管材３も一般的な推進工法と同様に該管材３として内径が径小なものを採用でき、よって、内径が径小な管体５を設置できる実用性に秀れた管体設置方法となる。
【００６７】
即ち、本実施例によれば、従来は難しいとされていた内径１２００乃至８００ｍｍ程度の径小な管材３・４が複数連設された管体５でも長距離に亙って設置できることになる。
【００６８】
また、第一区間の形成は一般的な推進工法と同様に行え、更に、第二区間の形成は一般的なシールド工法と同様に行えるから、既に所有している推進工法用の装置やシールド工法用の装置を使用してコスト安で実施できることになる。
【００６９】
また、第一区間の形成の後に第二区間の形成を行うから、施工手順が簡便であり、よって、中押し工法のように複雑な制御や機構は不要で、この点においてもコスト安で実施できることになる。
【００７０】
また、第二区間の管材４の内部が整然となるから、セグメント台車２１に移動、即ち、セグメント８の運搬をスムーズに行え、これにより作業性は良好となる。
【００７１】
また、排泥ポンプ１８は管体５の全長に対応できるから、第二区間の内部に中継ポンプを設けたりする必要は無く、この点においてもセグメント８の運搬を良好に行える。
【００７２】
また、第一区間の管材３の内部に収納した管内設備が該第一区間の推進と共に移動して常にセグメント８を組み立てる場所の近くに存在することになるから、一般的なシールド工法と異なり、管内設備を移動させずとも良く、それだけ作業性は良好となる。
【００７３】
また、第一推進ジャッキ１４の推進力は第一区間を推進できる程度で良く、よって、強力な推進ジャッキを必要とせず、それだけ設備費を安価にできることになる。
【００７４】
尚、セグメント８が軽量な場合等は第一区間の管材３の内部に作業員が入り、この作業員が作業筒１１の内部でセグメント８を組み立てて管材４を形成する方法を採用しても良い。
【００７５】
また、第一区間の管材３や作業筒１１を全て推進せしめて横穴２には第二区間の管材４のみが残る構成、即ち、管体５を全て第二区間の管材４で形成する方法を採用しても良い。
【００７６】
また、第一区間の形成の際、例えば、一般的な開削工法と同様に、地山の表面から該地山を掘削し、この掘削部分に掘削装置及び管材を配設して本実施例の第一区間と同様のものを形成し、この第一区間の後方に第二区間を形成するような方法でも本実施例と同様の作用効果が得られる。
【図面の簡単な説明】
【図１】従来例の説明側断面図である。
【図２】従来例の説明縦断面図である。
【図３】本実施例の要部の説明側断面図である。
【図４】本実施例の要部（第一区間）の説明縦断面図である。
【図５】本実施例の工程を示す説明側断面図である。
【図６】本実施例の工程を示す説明側断面図である。
【図７】本実施例の工程を示す説明側断面図である。
【図８】本実施例の工程を示す説明側断面図である。
【符号の説明】
１　掘削装置
２　横穴
３・４　管材
５　管体
６　第一管体
７　空間部
８　セグメント
９　第二管体
１１　作業筒
１２　排泥管
１３　立坑
１４　第一推進ジャッキ
１５　推進ジャッキ，第二推進ジャッキ
２０　エレクター[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for installing a pipe such as a sewer pipe and an apparatus for installing a pipe.
[0002]
Problems to be solved by the prior art and the invention
As a pipe installation method using an excavator (shield machine), a shield method and a propulsion method have been proposed.
[0003]
By the way, the shield method and the propulsion method have the following advantages and disadvantages.
[0004]
The shield method can install a tube over a long distance, but can install only a tube having an inner diameter larger than a certain degree.
[0005]
Explaining with reference to FIGS. 1 and 2, in the shield method, a pipe jack 44 is formed by providing a shield jack 41 at the rear of the excavator 40 and assembling a segment 43 with a space 42 formed by contracting the shield jack 41. Then, the contracted shield jack 41 pushes the formed pipe member 44 to propel the excavator 40 by a reaction force, and this method is repeated. In the drawing, reference numeral 51 denotes a waste soil pump, 52 denotes a waste soil pipe, 53 denotes a mud pipe for supplying muddy water to the face, 54 denotes a conductive cable, 55 denotes a control cable, and 56 denotes an extension pipe for extending the mud pipe. And 57, a trailing bogie equipped with other in-pipe facilities.
[0006]
In this shield method, the propulsion resistance of the excavator 40 is constant and does not increase. Therefore, by forming a large number of pipes 44, the pipes can be arranged over a long distance. However, in the already formed pipe material 44, in-pipe equipment such as assembling equipment for assembling the segment 43 and operating equipment for operating the excavator 40, specifically, an erector 46 (a device for holding the segment 43) Since the assembly of the segment 43 and the excavation by the excavator 40 cannot be performed unless all of the segment carriage 47, the power unit 48, the transformer 49, the cable reel 50, and the like are provided, the inner diameter of the pipe material 44 accommodates these in-pipe facilities. And a diameter capable of transporting the segment 43 to the rear of the excavator 40 (that is, a diameter capable of securing a space for pipe facilities and a space for transporting the segment 43). Would.
[0007]
Therefore, in the shield method, the inner diameter of the tube is required to be at least about 1200 mm.
[0008]
On the other hand, the propulsion method can be installed even with a small-diameter pipe, but cannot install the pipe over a long distance.
[0009]
More specifically, in the propulsion method, a pipe is arranged at the rear of the drilling device, a propulsion jack is provided at the rear of the tube, the propulsion jack is extended to propel the excavator and the pipe, and then the propulsion jack is contracted. Then, a pipe is provided in the space formed by the contraction of the propulsion jack. (This pipe may be used either in the case where it is unnecessary to assemble or in the case where the segments need to be assembled when the tube is provided.) ), And then, the extension of the propulsion jack causes the newly provided pipe material, the already provided pipe material and the drilling device to be propelled.
[0010]
Therefore, in the propulsion method, a space enough to provide an operating facility for operating the excavator and a conveyor for discharging waste soil generated by excavation of the excavator is sufficient for the inside of the pipe material (ie, No space is needed to carry the segments), and smaller tubing can be employed. However, as the propulsion distance increases, the amount of pipe material to be propelled increases, and the frictional resistance with the ground increases accordingly.
[0011]
Therefore, in the propulsion method, there is a limit to the installation distance of the pipe material, and at present, the construction performance of about 1000 m is the maximum.
[0012]
Further, as an improved example of the propulsion method, a middle push jack is provided for each of a predetermined number of pipes, and by utilizing the expansion and contraction of the middle push jack, a plurality of pipes are sequentially propelled as in the movement of a hornworm, thereby propelling the pipe. A so-called middle-pressing method has been proposed to limit an increase in frictional resistance between the ground and the ground.
[0013]
However, the middle-push method requires a large number of jacks (middle-push jacks and propulsion jacks) to be controlled and expanded and contracted, which is troublesome and costly. There is a problem that the installation speed is slow.
[0014]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a practically useful tube installation technology that can install a tube having a small inner diameter over a long distance.
[0015]
[Means for Solving the Problems]
The gist of the present invention will be described with reference to the accompanying drawings.
[0016]
A lateral hole 2 is drilled in the ground with the excavator 1, a plurality of pipes 3.4 are disposed in the side hole 2, and a pipe body 5 in which the plurality of pipes 3.4 are continuously installed is installed in the ground. A plurality of pipes 3 provided with the excavator 1 at the front and the propulsion jack 15 at the rear, and a space formed behind the propulsion jack 15 by contraction of the propulsion jack 15. The pipe member 4 formed by assembling the segments 8 is disposed on the pipe 7 and then the propulsion jack 15 is extended to press the assembled pipe material 4 supported by a reaction force receiver, so that the propulsion jack 15 is moved forward. The present invention relates to a pipe installation method characterized in that the pipe 3 and the excavator 1 are propelled.
[0017]
Further, the excavator 1 drills a lateral hole 2 in the ground, a plurality of pipes 3.4 are disposed in the lateral hole 2, and a pipe 5 in which the plurality of pipes 3.4 are continuously connected to the ground. In this method, the excavator 1 and a plurality of pipes 3 connected to the rear of the excavator 1 are propelled by pushing a first propulsion jack 14 to distribute the plurality of pipes 3 to the lateral holes 2. After the installation, the second propulsion jack 15 is disposed between the first propulsion jack 14 and the plurality of pipe members 3 disposed as described above. The tube member 4 formed by assembling the segments 8 is disposed in the space 7 between the first propulsion jack 14 formed at the rear and the second propulsion jack 15 is extended and supported by the reaction force receiver. By pressing the assembled pipe material 4, a plurality of pipes 4 in front of the second propulsion jack 15 are pressed. Those of the tube installation method characterized by propelling the tubing 3 and the drilling device 1.
[0018]
Further, in the pipe installation method according to the second aspect, in-pipe equipment such as equipment for operating the excavator 1 and equipment for assembling the segment 8 is provided inside the plurality of pipes 3 in front of the second propulsion jack 15. The present invention relates to a tube installation method characterized by being provided.
[0019]
In addition, in the pipe installation method according to any one of claims 2 and 3, after the plurality of pipes 3 are disposed by pushing the first propulsion jack 14, the first propulsion jack 14 and the plurality of pipes are disposed. A work cylinder 11 having a second propulsion jack 15 provided therein is disposed between the first propulsion jack 14 and the first propulsion jack 14 formed by contraction of the second propulsion jack 15 inside the work cylinder 11. The present invention relates to a method of installing a tube, wherein the segments 8 are assembled in the space 7.
[0020]
According to a fourth aspect of the present invention, there is provided a tube installation method, wherein an erector 20 for assembling the segment 8 is installed inside the working tube 11.
[0021]
Further, in the pipe installation method according to any one of claims 2 to 5, a plurality of pipe members 3 connected to the rear of the excavating device 1 are disposed in a mud state by discharging soil generated by excavation by the excavating device 1. The present invention relates to a method of installing a pipe, characterized in that a mud pipe 12 is provided to be conveyed to the ground via the inside of 4.
[0022]
Further, the excavator 1 drills a lateral hole 2 in the ground, a plurality of pipes 3.4 are disposed in the lateral hole 2, and a pipe 5 in which the plurality of pipes 3.4 are continuously connected to the ground. The following step (1) is performed, and then the following step (2) is repeated to form the first pipe 6 behind the excavator 1, and then the following step (1) is performed. Steps (3) and (4) are performed in random order, subsequently, the following step (5) is performed, and then the following step (6) is repeated to place a second pipe behind the first pipe 6. The present invention relates to a pipe installation method characterized in that a pipe 5 in which a plurality of pipes 3 and 4 are continuously installed on the ground by installing the bodies 9 in series.
Record
(1) The excavator 1 and the first propulsion jack 14 are provided in the shaft 13 bored in the ground, and the excavator 1 is propelled by the pushing of the first propulsion jack 14, and the excavator 1 is connected to the shaft 13. It is introduced from the side wall into the ground, and subsequently, the first propulsion jack 14 is contracted to form a gap between the first propulsion jack 14 and the excavator 1, and then the pipe 3 is disposed in this gap. Then, the step of propelling the pipe member 3 and the excavator 1 by extending and pressing the contracted first propulsion jack 14.
{Circle around (2)} The first propulsion jack 14 is contracted to form a gap between the first propulsion jack 14 and the pipe 3, and then a new pipe 3 is disposed in the gap. A step of propelling a new pipe material 3, an already propelled pipe material 3, and an excavator 1 provided by extending and pushing the first propulsion jack 14 that has been set.
{Circle around (3)} A step of providing pipe-inside equipment such as equipment for operating the excavator 1 and equipment for assembling the segment 8 inside the pipe material 3 of the first pipe body 6.
{Circle around (4)} A step of providing the working cylinder 11 having the second propulsion jack 15 inside the first pipe 6. {Circle around (5)} The second propulsion jack 15 is contracted inside the working cylinder 11, and the second propulsion jack 15 is contracted. The tube material 4 is formed by assembling the segment 8 using the equipment for assembling the segment 8 in the space 7 formed by the shrinkage of the tube 7. Subsequently, the second propulsion jack 15 is extended to press the assembled tube material 4. A step of propelling the pipe material 3, the excavator 1 and the work tube 11 of the first pipe body 6
{Circle around (6)} The second propulsion jack 15 is contracted to form a space 7 between the second propulsion jack 15 and the pipe member 4 formed by assembling the segment 8. Is formed, and then the contracted second propulsion jack 15 is extended to press the assembled pipe 4, thereby forming the pipe 3, the drilling apparatus 1 and the working tube of the first pipe 6. Process to promote 11
[0023]
Further, according to the pipe installation method according to any one of claims 1 to 7, the pipe installation method is characterized in that a pipe 5 having an inner diameter of 1200 to 800 mm is installed.
[0024]
Further, the excavator 1 drills a lateral hole 2 in the ground, a plurality of pipes 3.4 are disposed in the lateral hole 2, and a pipe 5 in which the plurality of pipes 3.4 are continuously connected to the ground. In a pipe installation method for installing a pipe, a pipe 5 installed in a lateral hole 2 is configured such that a predetermined section on the distal end side includes an excavator 1 and a plurality of pipes 3 connected continuously behind the excavator 1. The first section is provided by being propelled by the pushing of the propulsion jack 15, and the rear of this first section is provided in the space 7 formed behind the propulsion jack 15 by contraction of the propulsion jack 15. The present invention relates to a pipe installation method, which is a second section provided by sequentially installing pipe members 4 formed by assembling segments 8.
[0025]
Further, there is provided a pipe installation apparatus for arranging a plurality of pipes 3.4 in a lateral hole 2 drilled in the ground and installing a pipe 5 having the plurality of pipes 3.4 connected to the ground. And a plurality of pipes 3 connected to the rear of the excavation section, and a plurality of pipes 3 connected to the rear of the plurality of pipes 3 to push the plurality of pipes 3 and the excavation section. A propulsion jack 15, a plurality of pipes 4 connected to the rear of the propulsion jack 15, and a plurality of pipes 3 connected to the back of the digging section are provided inside the tubing section 3 to operate the digging section and to operate the segment 8. The present invention relates to a pipe installation apparatus, which comprises an in-pipe facility for assembling.
[0026]
Further, there is provided a pipe installation apparatus for arranging a plurality of pipes 3.4 in a lateral hole 2 drilled in the ground and installing a pipe 5 having the plurality of pipes 3.4 connected to the ground. The excavation part for excavating the tip, the pipe material 3 propelled by the first propulsion jack 14 supported by the support portion at the start end of the lateral hole 2, and the pipe material 3 supported by the first propulsion jack 14 to propel the pipe material 3 A second propulsion jack 15, equipment for operating the excavating portion disposed inside the pipe 3 propelled by the first propulsion jack 14, and a pipe 3 also propelled by the first propulsion jack 14. When the segment 8 is assembled in the space 7 formed between the second propulsion jack 15 and the first propulsion jack 14 by the propulsion of the second propulsion jack 15, the pipe 4 is inserted into the space 7. And equipment for arranging Those of the tube installation device according to claim and.
[0027]
Function and effect of the present invention
Since only the excavator 1 and a predetermined number of pipes 3 connected to the rear of the excavator 1 are propelled with respect to the ground, the arrangement of the pipes 3 and 4 for forming the pipe 5 is performed. Even if the installation length becomes long, the increase in frictional resistance due to the propulsion of the pipe 3 and the like is limited, and therefore, the excavator 1 and the predetermined number of pipes 3 can be propelled over a long distance.
[0028]
In addition, since the pipe member 4 formed by assembling the segments 8 is disposed behind the predetermined number of pipe members 3 to be propelled, the pipe body 5 can be installed over a long distance similarly to the shield method.
[0029]
When arranging the tubing 4 formed by assembling the segments 8, the predetermined number of tubing 3 already exists behind the excavator 1. By providing equipment for assembling the segment 8 and equipment for operating the excavator 1 (such as the power unit 22) inside the predetermined number of pipes 3, the segment 8 can be transported to a place where the segment 8 is to be assembled. Space can be secured well, and even a pipe material 4 having a small inner diameter, which cannot be provided by a normal shield method, can be assembled and provided in the lateral hole 2.
[0030]
That is, as the plurality of pipes 3 to be propelled by the pushing of the first propulsion jack 14, the pipes 3 having a small inner diameter can be adopted as in the ordinary propulsion method, and the pipes 4 assembled behind the pipes 3 are also used. It is possible to make the inside diameter small enough to transport the segment 8, so that the pipe body 5 having a small inside diameter can be installed in the ground.
[0031]
As described above, the present invention provides a tube installation technology with excellent practicality that can be installed over a long distance even with a tube having a small inner diameter.
[0032]
BEST MODE FOR CARRYING OUT THE INVENTION
3 to 8 show one embodiment of the present invention, which will be described below.
[0033]
In the present embodiment, a lateral hole 2 is drilled in the ground with the excavator 1, a plurality of pipes 3.4 are arranged in the lateral hole 2, and the plurality of pipes 3.4 are continuously connected to the ground. The pipe 5 is installed in the lateral hole 2, and a predetermined section on the distal end side includes the excavator 1 and the plurality of pipes 3 connected continuously behind the excavator 1. A first section (a section formed like a so-called propulsion method) is provided by being propelled by the pushing of the propulsion jack 15, and the rear of this first section is contracted by the propulsion jack 15 so that the propulsion jack 15 contracts. A second section (a section formed like a so-called shield method) is provided by sequentially installing the pipe members 4 formed by assembling the segments 8 in the space section 7 formed behind the section 15. This is a method of installing a tube 5 having a small inner diameter over a long distance.
[0034]
In addition, a method is adopted in which most of the in-pipe facilities such as facilities for operating the excavator 1 and facilities for assembling the segments 8 are provided inside the pipe material 3 in the first section.
[0035]
Further, a method is employed in which a segment truck 21 for transporting the segment 8 to the space 7 formed by the contraction of the propulsion jack 15 is provided inside the pipe member 4 in the second section and is moved.
[0036]
Hereinafter, this will be described in more detail with reference to FIGS.
[0037]
First, a shaft 13 having a predetermined depth is bored in the ground. An existing shaft may be used.
[0038]
Subsequently, a propulsion jack 14 (hereinafter, referred to as a first propulsion jack 14) is installed in the shaft 13.
[0039]
Subsequently, the excavator 1 is arranged in the shaft 13, and the excavator 1 is introduced into the ground from the side wall of the shaft 13 by excavation by the excavator 1 and extension of the first propulsion jack 14, thereby forming the side hole 2. Start drilling.
[0040]
The excavator 1 may employ a muddy excavator that excavates while introducing muddy water into the face. According to this muddy excavator, a muddy water film is formed on the face by the muddy water, so that the face is stable, so that the ground can be excavated very well and the side hole 2 can be formed. .
[0041]
Note that, as the excavator 1, a closed excavator other than a muddy excavator or an open excavator may be used.
[0042]
Subsequently, the first propulsion jack 14 is contracted to form a gap between the first propulsion jack 14 and the excavator 1, and the pipe 3 is disposed in the gap.
[0043]
As the pipe material 3 to be provided, for example, a fume pipe, a steel pipe, a ductile pipe, a pipe formed by assembling segments, or a non-assembled pipe material may be adopted.
[0044]
A mud pipe 17 for introducing the muddy water into the excavator 1 and a mud pipe 12 for discharging mud generated by excavation in the excavator 1 through a shaft 13 are provided in the pipe 3 provided. A mud pump 18 for discharging the mud using the mud pipe 12 is installed.
[0045]
As the sludge pump 18, a pump having an output corresponding to the entire length of the pipe 5 to be installed is adopted.
[0046]
Subsequently, the tubing 3 and the excavator 1 are propelled by extending and pushing the contracted first propulsion jack 14.
[0047]
As described above, the expansion and contraction of the first propulsion jack 14, the arrangement of the pipe material 3, the installation of the mud guide pipe 17 and the exhaust pipe 12, and the like are repeated, and the additional pipe material 3 is sequentially arranged on the ground to form the first section. (See FIG. 5).
[0048]
The length of the first section is set to be at least as long as the in-pipe facilities can be arranged inside the pipe material 3 of the first section, for example, at least 50 m. If the first section is long, the frictional resistance with the ground increases, so it is better not to make it longer than necessary.
[0049]
When the first section including the excavator 1 and the first pipe 6 constituted by the predetermined number of pipes 3 is completed with the predetermined number of pipes 3 to be arranged, the first propulsion jack 14 is contracted, and the first section is contracted. The work tube 11 in which the second propulsion jack 15 is provided is disposed in the gap between the pipe member 3 at the rearmost position.
[0050]
In the first section of the pipe 3, many of the in-pipe facilities such as the facility for operating the excavator 1 and the facility for assembling the segments 8 are provided.
[0051]
By the way, in a general shield method, pipe facilities include an erector (a device for holding a segment), a segment trolley (a trolley for transporting a segment), and a power unit (a power source, a motor, and the like used to operate the excavator 1). , A conductive cable, a cable reel (wound a conductive cable for supplying electricity to the excavator 1), a transformer (transformer for changing the voltage of electricity for a power unit), and the like. In the present embodiment, the erector 20 is disposed in the working tube 11, the segment cart 21 is disposed inside the tube 4 in the second section described later (the inside of the second tube 9 described later), and other tube equipment (power unit) is provided. 22, a transformer 23, a cable reel, etc., which are indicated by reference numeral 10 in FIGS. 4 to 8) are arranged inside the tube material 3 in the first section (inside the first tube body 6).
[0052]
Each of these in-pipe facilities may be of a stationary type, but it is better to install them on a trolley in consideration of the case of moving inside the pipe material 3.
[0053]
Further, in order to cope with an increase in the distance from the shaft 13 to the power unit 22 due to the propulsion of the excavator 1, the conductive cable 24 may be provided with a guide roller (not shown) so as to be able to move smoothly. Further, the conductive cable 24 may be connected to the tube 3 with an auxiliary wire (not shown) at a predetermined interval so that the conductive cable 24 can be pulled well in response to the propulsion of the excavator 1.
[0054]
In addition, a telescopic pipe 19 for extending the mud pipe 17 and the drain pipe 12 is also provided inside the pipe material 3 in the first section (that is, inside the first pipe 6).
[0055]
Subsequently, the second propulsion jack 15 is contracted inside the working cylinder 11, and the contraction of the second propulsion jack 15 causes the segment 8 to be formed in the space 7 formed behind the second propulsion jack 15 using the erector 20 or the like. Is formed to form a tube material 4 (see FIG. 6).
[0056]
Further, inside the assembled pipe member 4, the sludge pipe 17 and the sludge pipe 12 provided inside the pipe member 3 in the first section are extended.
[0057]
Subsequently, the second propulsion jack 15 is extended to push the tip of the assembled tube 4 to move the tube 3 (that is, the first tube 6), the excavator 1 and the working cylinder 11 in the first section. I will promote it.
[0058]
Subsequently, the second propulsion jack 15 is contracted to form a space 7 between the second propulsion jack 15 and the pipe member 4 formed by assembling the segment 8. 20 and the like, a new pipe 4 is formed by assembling the segments 8, and then the contracted second propulsion jack 15 is extended to push the assembled pipe 4 so as to push the pipe 4 in the first section. 3. The excavator 1 and the working cylinder 11 are propelled.
[0059]
Further, the extended sludge pipe 17 and the sludge pipe 12 are extended inside the new pipe member 4.
[0060]
In this manner, the expansion and contraction of the second propulsion jack 15, the disposition of the pipe member 4 by assembling the segments 8, and the extension of the mud guide pipe 17 and the mud discharge pipe 12 are repeated to form a ground and the first pipe body in the first section. New pipe members 4 are sequentially arranged at the rear of 6, and a second section (second pipe body 9) is formed (see FIG. 7).
[0061]
When the second section is formed, the first propulsion jack 14 prevents the pipe member 4 in the second section from moving backward in the lateral hole 2 so that the pipe member 4 in the second section does not slip in the lateral hole 2 due to the pushing and extending of the second propulsion jack 15. 4 (in this case, the first propulsion jack 14 is receiving a reaction force). Further, when the second section has a predetermined length, the frictional resistance between the pipe 4 of the second section and the ground increases, and the pushing and extending of the second propulsion jack 15 causes the pipe 4 ( That is, when the second tubular body 9) does not slip in the lateral hole 2, the support by the first propulsion jack 14 is released and the formation of the second section is continued (see FIG. 8; in this case, the tubular member 4). The frictional resistance between the ground and the ground is the reaction force.) The removed first propulsion jack 14 is used at another work site.
[0062]
The segments 8 to be assembled inside the work tube 11 are sequentially replenished into the work tube 11 by using the segment truck 21 disposed inside the pipe member 4 in the second section.
[0063]
After forming the second section in this way, the first propulsion jack 15 is removed by removing the second propulsion jack 15 from the inside of the working tube 11 and assembling the segment 8 inside the working tube 11 to form the tube 4. The pipe member 5 of the section is connected to the pipe material 3 of the section and the pipe material 4 of the second section.
[0064]
In the figure, reference numeral 25 denotes a control cable for controlling the excavator 1 and the assembly equipment, etc., 26 denotes a packing for closing a gap between the rear end of the working cylinder 11 and the pipe 4 at the front end of the second section, and 27 denotes a packing. This is a moving path for smoothly moving the segment truck 21.
[0065]
In the present embodiment, as described above, the pipe members 4 can be sequentially formed by assembling the segments 8 sequentially behind the first section, thereby distributing the pipe members 3.4 over a long distance. It is a practical way to install a pipe that can be installed.
[0066]
In addition, since most of the in-pipe equipment such as the equipment for operating the excavator 1 and the equipment for assembling the segment 8 are housed inside the pipe material 3 in the first section and the segment 8 is assembled, the second section is used. The inner diameter of the pipe material 4 may be such that the drain truck 12 or the like for moving the segment truck 21 or discharging the waste soil is provided, and therefore, the inner diameter of the pipe material 4 of the second section can be small. Further, as the pipe material 3 in the first section, a pipe material having a small inner diameter can be adopted as the pipe material 3 in the same manner as a general propulsion method, so that it is excellent in practicality in which a pipe body 5 having a small inner diameter can be installed. It becomes the pipe installation method.
[0067]
That is, according to the present embodiment, it is possible to install the tube 5 having a plurality of small-diameter tubes 3, 4 having an inner diameter of about 1200 to 800 mm, which has been conventionally difficult, over a long distance.
[0068]
In addition, the first section can be formed in the same manner as a general propulsion method, and the second section can be formed in the same manner as a general shield method. It can be carried out at low cost by using a device for use.
[0069]
In addition, since the second section is formed after the formation of the first section, the construction procedure is simple, and therefore, complicated controls and mechanisms are not required as in the case of the middle-push method, and in this respect, the cost can be reduced. become.
[0070]
In addition, since the inside of the pipe member 4 in the second section is orderly, the movement to the segment cart 21, that is, the transportation of the segment 8 can be performed smoothly, thereby improving workability.
[0071]
In addition, since the sludge pump 18 can correspond to the entire length of the pipe 5, there is no need to provide a relay pump inside the second section, and the transport of the segment 8 can be favorably performed in this regard.
[0072]
In addition, since the in-pipe equipment housed inside the tube material 3 of the first section moves with the propulsion of the first section and always exists near the place where the segment 8 is assembled, unlike a general shield method, It is not necessary to move the equipment in the pipe, and the workability is improved accordingly.
[0073]
Further, the propulsion force of the first propulsion jack 14 is sufficient to propell the first section, so that a strong propulsion jack is not required and the equipment cost can be reduced accordingly.
[0074]
When the segment 8 is lightweight, for example, a worker enters the inside of the tube 3 in the first section, and the worker assembles the segment 8 inside the work tube 11 to form the tube 4. good.
[0075]
Further, a configuration in which the pipe material 3 and the working tube 11 in the first section are all propelled so that only the pipe material 4 in the second section remains in the lateral hole 2, that is, a method in which the pipe body 5 is entirely formed of the pipe material 4 in the second section. You may adopt it.
[0076]
In the formation of the first section, for example, as in the case of a general open-cutting method, the ground is excavated from the surface of the ground, and a digging device and a pipe material are arranged in this excavated portion to thereby provide the first embodiment. The same operation and effect as in the present embodiment can be obtained by forming the same section as the first section and forming the second section behind the first section.
[Brief description of the drawings]
FIG. 1 is an explanatory side sectional view of a conventional example.
FIG. 2 is an explanatory longitudinal sectional view of a conventional example.
FIG. 3 is an explanatory side sectional view of a main part of the embodiment.
FIG. 4 is an explanatory longitudinal sectional view of a main part (first section) of the embodiment.
FIG. 5 is an explanatory side sectional view showing a step of the present embodiment.
FIG. 6 is an explanatory side sectional view showing a step of the present embodiment.
FIG. 7 is an explanatory side sectional view showing a step of the present embodiment.
FIG. 8 is an explanatory side sectional view showing a process of this embodiment.
[Explanation of symbols]
1 Drilling rig
2 side hole
3.4 Tube material
5 tube
6 first pipe
7 space
8 segments
9 Second pipe
11 Working tube
12 Waste pipe
13 shaft
14 First propulsion jack
15 propulsion jack, second propulsion jack
20 Erector

Claims

A method of drilling a lateral hole in a ground with an excavator, arranging a plurality of pipes in the lateral hole, and installing a pipe body in which the plurality of pipes are continuously provided in the ground, And a plurality of pipes provided with a propulsion jack at the rear are provided, and a pipe formed by assembling segments in a space formed at the rear of the propulsion jack by contraction of the propulsion jack is provided. A pipe body installation method comprising: extending the propulsion jack and pressing the assembled pipe material supported by a reaction force receiver to propelle a pipe material and a drilling device in front of the propulsion jack.

A method of drilling a side hole in a ground with an excavator, arranging a plurality of pipes in the side hole, and installing a pipe body in which the plurality of pipes are continuously connected to the ground, wherein the excavator and the After the plurality of pipes connected to the back of the excavator are propelled by the pushing of the first propulsion jack and the plurality of pipes are disposed in the lateral hole, the first propulsion jack and the plurality of pipes disposed above are disposed. A pipe member formed by assembling segments in a space between the second propulsion jack and the first propulsion jack formed behind the second propulsion jack by contraction of the second propulsion jack. Then, the second propulsion jack is extended to push the assembled pipe supported by the reaction force receiver, thereby propelling the plurality of pipes and the excavation device in front of the second propulsion jack. A pipe installation method characterized by the above-mentioned.

The pipe installation method according to claim 2, wherein in-pipe equipment such as equipment for operating the excavator and equipment for assembling the segments is provided inside the plurality of pipes in front of the second propulsion jack. How to install pipes.

4. The pipe installation method according to any one of claims 2 and 3, wherein a plurality of pipes are arranged by pushing a first propulsion jack, and then a plurality of pipes are disposed between the first propulsion jack and the plurality of pipes. A work cylinder in which two propulsion jacks are housed is arranged, and the segments are assembled in the space between the work tube and the first propulsion jack formed by the contraction of the second propulsion jack. Pipe installation method.

5. The method according to claim 4, wherein an erector for assembling the segments is installed inside the working tube.

In the pipe installation method according to any one of claims 2 to 5, the earth removal generated by the excavation by the excavator is made into a mud state and passes through the inside of a plurality of pipes continuously provided behind the excavator. A pipe installation method, characterized in that a mud pipe is provided for transporting to the ground.

A method of drilling a lateral hole in a ground with an excavator, arranging a plurality of pipes in the lateral hole, and installing a pipe body in which the plurality of pipes are continuously connected to the ground, the following (1) Then, the following step (2) is repeated to form a first pipe behind the excavator, and then the following steps (3) and (4) are performed in random order. Subsequently, the following step (5) is performed, and subsequently, the following step (6) is repeated to connect the second pipe behind the first pipe to connect a plurality of pipes to the ground. A pipe installation method, comprising: installing an installed pipe.
(1) An excavator and a first propulsion jack are provided in a shaft excavated in the ground, and the excavator is propelled by pushing the first propulsion jack, and the excavator is introduced into the ground from the side wall of the shaft. Then, the first propulsion jack is contracted to form a gap between the first propulsion jack and the excavator, and then a tube is disposed in the gap. A step of propelling the pipe and the excavating device by extending and pushing the propulsion jack. (2) The first propulsion jack is contracted to form a gap between the first propulsion jack and the pipe. A step of arranging a new pipe, and then extending and pushing the contracted first propulsion jack to propel the newly arranged pipe, an already propelled pipe, and a drilling device. Activate the drilling rig inside the tube tubing Of providing pipes such as equipment for assembling the pipes and equipment for assembling segments. (4) Step of providing a working cylinder having a second propulsion jack installed behind the first pipe body. (5) Second step inside the working pipe. The propulsion jack is contracted, and a pipe is formed by assembling the segment using equipment for assembling the segment in the space formed by the contraction of the second propulsion jack. A step of pushing the assembled pipe material to push the pipe material of the first pipe body, the excavating device and the working tube (6) The second pushing jack is contracted by contracting the second pushing jack and the pipe material formed by assembling the segments. A space is formed therebetween, and then a tube is formed by assembling a new segment in this space, and then the contracted second propulsion jack is formed. The first tube of the tube by allowed to press the assembled tubing and long process allowed to promote drilling equipment and operations cylinder

The method for installing a tube according to any one of claims 1 to 7, wherein a tube having an inner diameter of 1200 to 800 mm is installed.

A pipe installation method of drilling a side hole in a ground with an excavator, arranging a plurality of pipes in the side hole, and installing a pipe in which the plurality of pipes are continuously connected to the ground, A predetermined section on the tip side is a first section provided by propelling an excavator and a plurality of pipes connected to the rear of the excavator by pushing a propulsion jack. The rear part of the first section is a second section which is disposed by sequentially installing pipes formed by assembling segments in a space formed behind the propulsion jack by contraction of the propulsion jack. A tube installation method, characterized in that:

A pipe installation device for arranging a plurality of pipes in a side hole drilled in the ground and installing a pipe in which the plurality of pipes are continuously connected to the ground, and an excavation unit that excavates a tip, A plurality of pipes connected to the rear of the excavation part, a propulsion jack connected to the rear of the plurality of pipes and pushing the plurality of pipes and the excavation part, and a propulsion jack connected to the rear of the propulsion jack. A plurality of pipes, and pipe equipment provided inside the plurality of pipes connected to the back of the excavation section for operating the excavation section and assembling segments. apparatus.

A pipe installation device for arranging a plurality of pipes in a side hole drilled in the ground and installing a pipe in which the plurality of pipes are continuously connected to the ground, and an excavation unit that excavates a tip, A tubing propelled by a first propulsion jack supported by a bearing at the beginning of the lateral hole, a second propulsion jack supported by the first propulsion jack and propelling the tubing, and propelled by the first propulsion jack Equipment disposed inside the pipe for operating the excavating section, and the second propulsion jack and the second propulsion jack also disposed inside the pipe propelled by the first propulsion jack and propelled by the second propulsion jack. And a facility for assembling segments in a space formed between the propulsion jack and a pipe material in the space.