JP3805742B2 - Pipe clamp press-fitting device, joining / press-fitting device and joining / press-fitting method - Google Patents

Pipe clamp press-fitting device, joining / press-fitting device and joining / press-fitting method Download PDF

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JP3805742B2
JP3805742B2 JP2002344768A JP2002344768A JP3805742B2 JP 3805742 B2 JP3805742 B2 JP 3805742B2 JP 2002344768 A JP2002344768 A JP 2002344768A JP 2002344768 A JP2002344768 A JP 2002344768A JP 3805742 B2 JP3805742 B2 JP 3805742B2
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pipe
clamp device
press
joined
lower clamp
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JP2004176431A (en
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章 梅国
秀雄 佐藤
春夫 星野
敏明 土屋
勇雄 松永
光範 洗
和義 渡辺
潔士 金山
充 藤井
仁 岸田
勇 矢作
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Takenaka Corp
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Takenaka Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、例えば既存構造物の補強などのため、上方の空間に制限がある場所において鋼管杭を順次溶接して地盤に圧入する管のクランプ圧入装置と接合・圧入装置及び接合・圧入方法に関するものである。
【０００２】
【従来の技術】
【特許文献１】
特開２００１−３５５２３４号公報
【特許文献２】
特開２０００−２２９６４５号公報
図６に示すように、鉄道橋や道路橋及び一般既存建築物等の既存構造物の改修や補強などで使用される鋼管杭４０を順次溶接して地盤に圧入する場合、上方の空間に制約があることから、図６（ａ）に示すように、接合する鋼管杭４０ｂの単位長さＬを短尺化して地盤４１に圧入した鋼管杭４０ａに溶接している。このため接合部が非常に多くなり工期が非常に長くなってしまう。
【０００３】
この接合部の数を減らすために、鋼管杭４０の単位長さＬをできるだけ長くしようとすると、接合部の地盤からの高さＨを極力小さく抑える必要がある。接合部を低い位置にすると、溶接姿勢などが低くなるため作業環境が悪く、溶接の品質管理も非常に困難であった。
【０００４】
また、鋼管杭４０を地盤に圧入するため、既存構造物４２又は既存構造物に取り付けた部材を反力として油圧ジャッキ５０を使用する場合には、油圧ジャッキ５０の長さだけ接合する鋼管杭４０ｂの単位長Ｌを短くする必要がある。さらに、圧入工程においては、油圧ジャッキ５０のストロークの関係から、ストロークが最大となった後は、図６（ｂ）に示すように、圧入用スペーサ５１を順次継ぎ足しながら圧入する必要があり、工数と工期が大幅に増大してしまう。
【０００５】
この圧入用スペーサの数を極力低減して鋼管杭を圧入するために、特許文献１に示す圧入装置は、油圧ジャッキのシリンダの先端部に、鋼管杭の端部を押す傘部と、外周壁に多段の凹溝を有し、鋼管杭の内周をガイドする筒部を有するアタッチメントを取付け、アタッチメントの凹溝に鋼管杭の端部を押すストッパを取付け、ストッパの取付け位置を順次変えながらシリンダを繰り返して伸縮させ、傘部とストッパにより鋼管杭を地盤に圧入するようにしている。
【０００６】
このように圧入用スペーサを使用しないで鋼管杭を地盤に圧入するようにしても、鋼管杭の接合を手動又は溶接ロボットでアーク溶接で行っていると、溶接時間が長くなってしまう。また、接合作業と圧入作業を独立させて交互に行う必要があるため作業が交錯し、作業効率が悪く工機を短縮することは困難である。
【０００７】
この接合作業と圧入作業を連続して行うために、特許文献２に示す溶接・圧入装置は、鋼管杭の外周部を把持する上部クランプ手段と下部クランプ手段と、上部クランプ手段と下部クランプ手段を連結したアプセット用シリンダと、下部クランプ手段を昇降する昇降用シリンダと、上部クランプ手段の上面に設けた反力受け部を有する。鋼管杭を接合するときは、下部クランプ手段で地中に圧入した鋼管杭を把持し、上部クランプ手段で接合する鋼管杭を把持し、上下の鋼管杭の接合部近傍の上下に溶接電極を取付け、上下の鋼管杭の端部を軽く接触させて溶接用トランスから溶接電極を介して大電流を流して接触部を集中的に加熱した後、アプセット用シリンダを作動して接触部に急激に圧力を加えて圧接する。この接合した鋼管杭を地中に圧入するときは、上部クランプ手段と下部クランプ手段による鋼管杭の把持を解除した状態で昇降用シリンダを収縮させて下部クランプ手段を上昇端まで引上げ、アプセット用シリンダを伸長させて上部クランプ手段を上昇させ、反力受け部を既存構造物に密着させる。この状態で下部クランプ手段により鋼管杭を把持し、昇降用シリンダを遊動状態にしてアプセット用シリンダをさらにが最大ストロークになるまで伸長させて下部クランプ手段を下降させて鋼管杭を地中に圧入する。アプセット用シリンダが最大ストロークになったら下部クランプ手段による鋼管杭の把持を解除し、昇降用シリンダを収縮させて下部クランプ手段を上昇端まで引上げてから下部クランプ手段で鋼管杭を把持して前記圧入動作を繰り返す。
【０００８】
【発明が解決しようとする課題】
このように特許文献２に示す溶接・圧入装置は、鋼管杭をフラッシュ溶接するとともに、この接合と圧入を連続的に行い、施工工数を低減できるが、鋼管杭の外周面を把持するため、装置が大型化し、重量も大きくなるため、狭隘な作業空間に移動することは容易でなかった。また、鋼管杭を密に設置したり、障害物近傍に設定する場合、装置を設置することが困難となり適用できない場合があった。
【０００９】
この発明はかかる短所を改善し、小型軽量化して狭隘な作業空間でも容易に設置して鋼管杭の接合と圧入を連続的に行うことができる管のクランプ圧入装置と接合・圧入装置及び接合・圧入方法を提供することを目的とするものである。
【００１０】
【課題を解決するための手段】
この発明の管のクランプ圧入装置は、加圧装置と上クランプ装置及び下クランプ装置とを有し、加圧装置は油圧シリンダ部と保持機構部を有し、油圧シリンダ部のピストンロッドは先端部に下クランプ装置を取り付ける保持部を有し、油圧シリンダ部のシリンダ胴は下端部に上クランプ装置を取り付ける保持部を有し、保持機構部は上面に反力受け部を有し、側面に搬送装置連結部を有し、油圧シリンダ部の上部に取り付けられ、上クランプ装置と下クランプ装置は、複数のクランプジョーと、クランプジョーを前後退する油圧シリンダを有し、上クランプ装置はシリンダ胴の保持部に取り付けられ、下クランプ装置はピストンロッドに設けた保持部に取り付けられ、接合する管を搬送するとき、上クランプ装置と下クランプ装置で接合する管の内周面を保持し、管を接合するとき、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、接合した管を地盤に圧入するとき、保持機構部の反力受け部を反力付与部材に押し当てて油圧シリンダ部を駆動して、下クランプ装置で接合した管内周面の保持と解除を繰り返すことを特徴とする。
【００１１】
この発明の管の接合・圧入装置は、クランプ圧入装置と給電装置とを有し、クランプ圧入装置は、加圧装置と上クランプ装置及び下クランプ装置とを有し、加圧装置は油圧シリンダ部と保持機構部を有し、油圧シリンダ部のピストンロッドは先端部に下クランプ装置を取り付ける保持部を有し、油圧シリンダ部のシリンダ胴は下端部に上クランプ装置を取り付ける保持部を有し、保持機構部は上面に反力受け部を有し、油圧シリンダ部の上部に取り付けられ、上クランプ装置と下クランプ装置は、複数のクランプジョーと、クランプジョーを前後退する油圧シリンダを有し、上クランプ装置はシリンダ胴の保持部に絶縁部材を介して取り付けられ、下クランプ装置はピストンロッドに設けた保持部に絶縁部材を介して取り付けられ、給電装置は、テンションリングに絶縁部材を介して取り付けられた複数の溶接用電極と、一方に開口部を有する台車に搭載した複数の溶接用トランスを有し、接合する管を搬送するとき、上クランプ装置と下クランプ装置で接合する管の内周面を保持し、管を接合するとき、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、給電装置の溶接用電極を、接合する管と地盤に圧入されている管の接合部近傍の外周部にそれぞれ取り付け、溶接用トランスから溶接用電極に電力を供給しながら油圧シリンダ部を駆動して接合部の離接を繰り返したのち接合部を加圧し、接合した管を地盤に圧入するとき、保持機構部の反力受け部を反力を付与する部材に押し当てて油圧シリンダ部を駆動して下クランプ装置で接合した管内周面の保持と解除を繰り返すことを特徴とする。
【００１２】
この発明の管の接合・圧入方法は、前記管のクランプ圧入装置を使用した管の接合・圧入方法であって、上クランプ装置と下クランプ装置を接合する管内に挿入し、上クランプ装置と下クランプ装置で接合する管の内周面を保持して地盤に埋設した管の位置まで移動し、接合する管を地盤に埋設した管の位置まで移動した後、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持して接合部を溶接し、管を接合した後、上クランプ装置と下クランプ装置による管の保持を解除し、保持機構部の反力受け部を反力付与部材に押し当てて、下クランプ装置で接合した管内周面の保持と解除を繰り返しながら油圧シリンダ部を駆動して接合した管を地盤に圧入することを特徴とする。
【００１３】
この発明の他の管の接合・圧入方法は、前記管の接合・圧入装置を使用した管の接合・圧入方法であって、クランプ圧入装置を搬送装置により接合する管の位置に移動し、上クランプ装置と下クランプ装置を接合する管内に挿入し、上クランプ装置と下クランプ装置で接合する管の内周面を保持して地盤に埋設した管の位置まで移動し、接合する管を地盤に埋設した管の位置まで移動した後、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、給電装置の溶接用電極を、接合する管と地盤に圧入されている管の接合部近傍の外周部にそれぞれ取り付け、溶接用トランスから溶接用電極に電力を供給しながら油圧シリンダ部を駆動して接合部の離接を繰り返したのち接合部を加圧し、管を接合した後、接合した管から溶接用電極を取り外し、上クランプ装置と下クランプ装置による管の保持を解除し、保持機構部の反力受け部を反力付与部材に押し当てて、下クランプ装置で接合した管内周面の保持と解除を繰り返しながら油圧シリンダ部を駆動して接合した管を地盤に圧入することを特徴とする。
【００１４】
【発明の実施の形態】
図１はこの発明の鋼管杭を溶接して地盤に圧入する接合・圧入装置の構成を示す断面図である。図に示すように、接合・圧入装置１はクランプ圧入装置２と給電装置３を有する。クランプ圧入装置２は、図２の断面図に示すように、加圧装置４と上クランプ装置５及び下クランプ装置６を有する。加圧装置４は油圧シリンダ部７と変位センサ８及び保持機構部９を有する。油圧シリンダ部７は片ロッド形複動シリンダからなり、ピストン１０とピストンロッド１１とシリンダ胴１２及びヘッド部１３を有する。ピストン１０は外周部にピストンリング１４を有し、下端部にピストンロッド１０が連結されている。ピストンロッド１１は先端部に下クランプ装置６を保持するフランジ１５を有する。シリンダ胴１２は、シリンダブロック１６とロッドカバーブロック１７を有する。シリンダブロック１６は、上端部が開口し、ピストン１０を上下方向に往復移動するシリンダ室１８を有する。ロッドカバーブロック１７はシリンダブロック１６の下部に設けられ、下端部に上クランプ装置５を保持するフランジ１９を有する。上クランプ装置５と下クランプ装置６は、図３の断面図に示すように、複数例えば６組のクランプジョー２０と、クランプジョー２０を前後退する片ロッド形複動シリンダの油圧シリンダ２１を有し、上クランプ装置５はシリンダ胴１２のロッドカバーブロック１７に設けたフランジ１９に絶縁部材を介して固定され、下クランプ装置６はピストンロッド１１に設けたフランジ１５に絶縁部材を介して固定されている。
【００１５】
シリンダ胴１２にはシリンダ室１８に連通する油路２２と、上クランプ装置５の油圧シリンダ２１に連通する油路２３と、下クランプ装置６の油圧シリンダ２１に作動油を供給する油路２４を有し、ピストンロッド１１には下クランプ装置６の油圧シリンダ２１に連通する油路２５を有し、シリンダ胴１２に設けられた油路２４とピストンロッド１１に設けた油路２５は油圧ホース２６で連結されている。ヘッド部１３はシリンダ室１８を密封するものであり、中心部に変位センサ８が取り付けられている。変位センサ８の先端部はピストン１０とピストンロッド１１の取付孔に摺動自在に挿入されている。
【００１６】
保持機構部９は、上面に反力受け用フランジ２７を有し、側面中心部には重機アタッチメント２８がピン機構２９により取り付けられ、下面のフランジ３０がヘッド部１３の上面に固定されている。重機アタッチメント２８には重機のアーム３１が取り付けられる。また、反力受け用フランジ２７は反力を付与する部材の傾きなどの不整に対応できるようにピン機構を有しても良い。
【００１７】
給電装置３は、図４（ａ）の正面図と（ｂ）の上面図に示すように、開閉できる締付部を有するテンションリング３２に絶縁部材を介して取り付けられた複数の溶接用電極３３と、一方に開口部を有する台車３４に搭載した複数の溶接用トランス３５を有する。溶接用電極３３は銅電極の周りに磁石を有する。この溶接用電極３３と溶接用トランス３５は電源ケーブル３６で接続される。
【００１８】
この接合・圧入装置１を使用して既存構造物の改修や補強などのために鋼管杭４０を順次溶接して地盤４１に圧入するときの施工方法を図５の工程図を参照して説明する。
【００１９】
図５（ａ）に示すように、重機により保持したクランプ圧入装置２の下クランプ装置６と上クランプ装置５を接合する鋼管杭４０ｂの内部に挿入し、下クランプ装置６と上クランプ装置５の油圧シリンダ２１を前進させてクランプジョー２０を鋼管杭４０ｂの内壁に押圧して鋼管杭４０ｂをクランプ圧入装置２で保持する。そして重機により鋼管杭４０ｂを保持したクランプ圧入装置２を移動し、接合する鋼管杭４０ｂを地盤４１に圧入した鋼管杭４０ａの上部に配置する。
【００２０】
このようにクランプ圧入装置２の下クランプ装置６と上クランプ装置５で鋼管杭４０ｂの内壁を保持するから、クランプ圧入装置２を小型，軽量化することができ、既存構造物４２などが有る狭隘な作業空間に容易に移動することができる。また、クランプ圧入装置２を鋼管杭４０ｂ内に挿入するから、鋼管杭４０ｂの長さを長くすることができる。
【００２１】
接合する鋼管杭４０ｂを地盤４１に圧入した鋼管杭４０ａの上部に配置した後、上クランプ装置５と下クランプ装置６の油圧シリンダ２１を後退させてクランプ圧入装置２による鋼管杭４０ｂの保持を解除する。その後、図５（ｂ）に示すように、重機でクランプ圧入装置２を下降させ、下クランプ装置６を地盤４１に圧入した鋼管杭４０ａの位置に配置し、上クランプ装置５を接合する鋼管杭４０ｂの位置に配置する。そして下クランプ装置６で鋼管杭４０ａを保持し、上クランプ装置５で接合する鋼管杭４０ｂを保持する。この状態で、図４に示すように、テンションリング３２に絶縁部材を介して取り付けられた溶接用電極３３を接合部の近傍の鋼管杭４０ａと鋼管杭４０ｂの外周面にそれぞれ取り付け、台車３４に搭載された溶接用トランス３５を鋼管杭４０ａ，４０ｂの位置まで移動し、各溶接用電極３３と溶接用トランス３５の２次側を電源ケーブル３６で接続する。この溶接用電極３３を鋼管杭４０ａ，４０ｂに取り付けるとき、テンションリング３２の弾性力と溶接用電極３３に設けた磁石により、溶接用電極３３を鋼管杭４０ａ，４０ｂに確実に密着させることができる。
【００２２】
そして溶接用トランス３５を１次電源に接続し、溶接用トランス３５から溶接用電極３３に低電圧で大電流の電力を供給しながら、油圧シリンダ部７のピストン１０を駆動して鋼管杭４０ａと鋼管杭４０ｂを接触，離間させて接合部を集中的に加熱する。そして接合部が十分に高温に達したときに、油圧シリンダ部７で鋼管杭４０ａと鋼管杭４０ｂの接触部を急激に加圧（アプセット）して鋼管杭４０ａと鋼管杭４０ｂを圧接する。
【００２３】
この鋼管杭４０ａと鋼管杭４０ｂを圧接するとき、適正なアプセットを行うためには鋼管杭４０ａと鋼管杭４０ｂを堅固にクランプする必要がある。アプセット力は接合する部材の断面積あたり３０−５０Ｎ／ｍｍ２程度必要である。例えば、鋼管杭４０ａと鋼管杭４０ｂの断面積が２００００ｍｍ２であると、必要なアプセット力は６００ＫＮ−１０００ＫＮになる。このアプセット力を基準に油圧シリンダ部７の加圧能力を定めるとともに上クランプ装置５と下クランプ装置６のクランプ力を決定する。また、油圧シリンダ部７で鋼管杭４０ａと鋼管杭４０ｂの接触部を急激に加圧するとき、３０ｍｍ／ｓｅｃ以上の速度を実現できるように構成している。
【００２４】
また、鋼管杭４０ａと鋼管杭４０ｂをフラッシュ溶接により接合するから、接合部を溶接技能者が監視している必要がなく、鋼管杭４０ａに取り付ける溶接用電極３３を鋼管杭４０ａの地盤４１の近くに取り付けることができ、鋼管杭４０ａを、上端部が地盤４１の近くに達するまで圧入することができ、鋼管杭４０ｂの長さをより長くすることができる。
【００２５】
鋼管杭４０ａと鋼管杭４０ｂを接合した後、上クランプ装置５と下クランプ装置６による鋼管杭４０の把持を解除し、図５（ｃ）に示すように、重機によりクランプ圧入装置２を上昇させ、保持機構部９の反力受け用フランジ２７を既存構造物４２など反力となる部材に押し当てる。ここで上クランプ装置５と下クランプ装置６の保持と解除を交互に繰り返しながら油圧シリンダ部７を駆動してクランプ圧入装置２を上昇させるようにしても良い。そして溶接用電極３３を鋼管杭４０ａ，４０ｂから取り外し、溶接用トランス３５を有する台車３４を後退させる。
【００２６】
この状態で、図５（ｄ）に示すように、下クランプ装置６で鋼管杭４０ｂを保持して、油圧シリンダ部７のピストン１０を下降させ、ピストンロッド１１を下に伸ばして鋼管杭４０ｂに下向きの力を与えて鋼管杭４０ａと鋼管杭４０ｂを地盤４１に圧入する。油圧シリンダ部７のストローク分だけピストンロッド１１を下に伸ばした後、下クランプ装置６による鋼管杭４０ｂの保持を解除し、ピストンロッド１１を引き込め、再び下クランプ装置６で鋼管杭４０ｂを保持して、圧入動作を繰り返す。
【００２７】
このように下クランプ装置６による鋼管杭４０ｂの保持と解除を繰返しながら鋼管杭４０ａ，４０ｂを地盤４１に圧入することにより、鋼管杭４０ａ，４０ｂの圧入量が油圧シリンダ部７のストローク分を越えた場合でも、圧入用スペーサの継ぎ足しは必要なく、圧入工程の工数を大幅に低減して施工時間を短縮することができる。
【００２８】
また、前記説明では鋼管杭４０を接合して地盤４１に圧入する場合について説明したが、端部にだけ鋼製部材を有するようなＰＣ杭などコンクリート部材でも中空断面であれば同様に適用することができる。
【００２９】
また、前記説明では鋼管杭４０ａと鋼管杭４０ｂをフラッシュ溶接により接合する場合について説明したが、既存構造物４２など反力となる部材と地盤４１までの間隔に余裕がある場合は、鋼管杭４０ａと鋼管杭４０ｂを溶接ロボット等により溶接しても良い。このような場合、クランプ圧入装置２を使用することにより鋼管杭４０ａ，４０ｂの保持や圧入を容易にすることができる。
【００３０】
【発明の効果】
この発明は以上説明したように、クランプ圧入装置の下クランプ装置と上クランプ装置で管の内周面を保持するから、クランプ圧入装置を小型，軽量化することができ、既存構造物などが有る狭隘な作業空間に容易に移動することができる。
【００３１】
また、クランプ圧入装置を管内に挿入するから、狭隘な作業空間で使用する管の単位長さを長くすることができ、接合個所を少なくして施工工数を低減することができる。
【００３２】
さらに、単位長さの管をフラッシュ溶接により接合することにより、接合部を溶接技能者が監視している必要がなく、地盤に圧入するの上端部を地盤の近くに達するまで圧入することができ、管の単位長さをより長くすることができる。
【００３３】
また、管を地盤に圧入するとき、下クランプ装置による管の保持と解除を繰返しながら油圧シリンダ部を駆動して地盤に圧入することにより、管の圧入量が油圧シリンダ部のストローク分を越えた場合でも、圧入用スペーサの継ぎ足しは必要なく、圧入工程の工数を大幅に低減して施工時間を短縮することができる。
【図面の簡単な説明】
【図１】鋼管杭を溶接して地盤に圧入する接合・圧入装置の構成を示す断面図である。
【図２】クランプ圧入装置の構成を示す断面図である。
【図３】上クランプ装置と下クランプ装置の構成を示す断面図である。
【図４】給電装置の構成図である。
【図５】鋼管杭の搬送と接合及び地盤に対する圧入の各工程を示す工程図である。
【図６】従来例の圧入工程を示す工程図である。
【符号の説明】
１；接合・圧入装置、２；クランプ圧入装置、３；給電装置、
４；加圧装置、５；上クランプ装置、６；下クランプ装置、
７；油圧シリンダ部、８；変位センサ、９；保持機構部、１０；ピストン、
１１；ピストンロッド、１２；シリンダ胴、１３；ヘッド部、
１４；ピストンリング、１５；フランジ、１６；シリンダブロック、
１７；ロッドカバーブロック、１８；シリンダ室、１９；フランジ、
２０；クランプジョー、２１；油圧シリンダ、
２２，２３，２４，２５；油路、２６；油圧ホース、
２７；反力受け用フランジ、２８；重機アタッチメント、２９；ピン機構、
３０；フランジ、３１；重機のアーム、３２；テンションリング、
３３；溶接用電極、３４；台車、３５；溶接用トランス、
３６；電源ケーブル、４０；鋼管杭、４１；地盤、４２；既存構造物。[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a clamp press-fitting device, a joining / pressing device, and a joining / pressing method for sequentially welding steel pipe piles and press-fitting into a ground in a place where there is a restriction on an upper space, for example, to reinforce an existing structure. Is.
[0002]
[Prior art]
[Patent Document 1]
JP 2001-355234 A [Patent Document 2]
JP, 2000-229645, A As shown in Drawing 6, steel pipe pile 40 used for repair or reinforcement of existing structures, such as a railway bridge, a road bridge, and a general existing building, is welded sequentially, and it press-fits to the ground. In this case, since the upper space is limited, the unit length L of the steel pipe pile 40b to be joined is shortened and welded to the steel pipe pile 40a press-fitted into the ground 41 as shown in FIG. 6 (a). For this reason, the number of joints increases so that the construction period becomes very long.
[0003]
In order to reduce the number of joints, if the unit length L of the steel pipe pile 40 is to be made as long as possible, it is necessary to keep the height H of the joint from the ground as small as possible. When the joint portion is set to a low position, the welding posture and the like are lowered, so that the working environment is bad and the quality control of welding is very difficult.
[0004]
Further, in order to press-fit the steel pipe pile 40 into the ground, when using the hydraulic jack 50 with the existing structure 42 or a member attached to the existing structure as a reaction force, the steel pipe pile 40b to be joined by the length of the hydraulic jack 50 is used. It is necessary to shorten the unit length L. Furthermore, in the press-fitting process, it is necessary to press-fit the press-fitting spacers 51 while sequentially adding the press-fitting spacers 51 as shown in FIG. The construction period will increase significantly.
[0005]
In order to press-fit a steel pipe pile by reducing the number of press-fitting spacers as much as possible, a press-fitting device shown in Patent Document 1 includes an umbrella portion that pushes the end of a steel pipe pile at the tip of a cylinder of a hydraulic jack, and an outer peripheral wall. Attach an attachment that has a multi-stage recessed groove and a cylindrical part that guides the inner circumference of the steel pipe pile, attach a stopper that pushes the end of the steel pipe pile to the recessed groove of the attachment, and change the position of the stopper in order. Is repeatedly expanded and contracted, and the steel pipe pile is press-fitted into the ground by the umbrella part and the stopper.
[0006]
Thus, even if the steel pipe pile is press-fitted into the ground without using the press-fitting spacer, if the steel pipe pile is joined manually or by arc welding with a welding robot, the welding time becomes long. Moreover, since it is necessary to perform the joining operation and the press-fitting operation alternately and alternately, the operations are mixed, the work efficiency is poor, and it is difficult to shorten the machine.
[0007]
In order to perform this joining operation and press-fitting operation continuously, the welding / press-fitting device shown in Patent Document 2 includes an upper clamp means, a lower clamp means, an upper clamp means, and a lower clamp means for gripping the outer periphery of the steel pipe pile. It has a connected upset cylinder, a lifting cylinder for raising and lowering the lower clamping means, and a reaction force receiving portion provided on the upper surface of the upper clamping means. When joining steel pipe piles, hold the steel pipe pile that is press-fitted into the ground with the lower clamp means, hold the steel pipe pile to be joined with the upper clamp means, and attach welding electrodes to the upper and lower parts near the joint of the upper and lower steel pipe piles. After lightly contacting the ends of the upper and lower steel pipe piles, a large current is passed from the welding transformer through the welding electrode to heat the contact part intensively, and then the upset cylinder is operated to rapidly press the contact part. And press. When this joined steel pipe pile is press-fitted into the ground, the lifting cylinder is contracted with the upper clamp means and the lower clamp means released, and the lower clamp means is pulled up to the rising end, and the upsetting cylinder Is extended to raise the upper clamp means, and the reaction force receiving portion is brought into close contact with the existing structure. In this state, the steel pipe pile is gripped by the lower clamp means, the lifting cylinder is made idle, the upset cylinder is further extended until the maximum stroke is reached, and the lower clamp means is lowered to press the steel pipe pile into the ground. . When the upset cylinder reaches the maximum stroke, the grip of the steel pipe pile by the lower clamp means is released, the lifting cylinder is contracted and the lower clamp means is pulled up to the rising end, and then the steel pipe pile is gripped by the lower clamp means and the press-fitting is performed. Repeat the operation.
[0008]
[Problems to be solved by the invention]
Thus, the welding and press-fitting device shown in Patent Document 2 is capable of flash welding a steel pipe pile and continuously performing this joining and press-fitting to reduce the number of construction man-hours. However, it is not easy to move to a narrow work space. In addition, when steel pipe piles are densely installed or set in the vicinity of an obstacle, it may be difficult to install the apparatus and may not be applicable.
[0009]
The present invention improves such disadvantages, and can be easily installed even in a narrow work space by reducing the size and weight, and a pipe clamp press-fitting device, a joining / press-fitting device, and a joining / press-fitting device capable of continuously joining and press-fitting steel pipe piles. The purpose is to provide a press-fitting method.
[0010]
[Means for Solving the Problems]
The tube clamp press-fitting device of the present invention has a pressurizing device, an upper clamp device and a lower clamp device, the pressurizing device has a hydraulic cylinder part and a holding mechanism part, and the piston rod of the hydraulic cylinder part has a tip part. The cylinder body of the hydraulic cylinder part has a holding part for attaching the upper clamping device at the lower end, the holding mechanism part has a reaction force receiving part on the upper surface, and is conveyed to the side surface. The upper clamp device and the lower clamp device have a plurality of clamp jaws and a hydraulic cylinder that moves the clamp jaws forward and backward, and the upper clamp device is attached to the upper portion of the hydraulic cylinder portion. Attached to the holding part, the lower clamp device is attached to the holding part provided on the piston rod, and when the pipe to be joined is transported, it is joined by the upper clamp device and the lower clamp device. When the pipe is joined, the inner peripheral surface of the pipe to be joined is held by the upper clamp device, and the inner peripheral surface of the pipe press-fitted into the ground is held by the lower clamp device and joined. When the pipe is pressed into the ground, the reaction force receiving part of the holding mechanism part is pressed against the reaction force applying member and the hydraulic cylinder part is driven to repeatedly hold and release the pipe inner peripheral surface joined by the lower clamp device. Features.
[0011]
The pipe joining and press-fitting device of the present invention has a clamp press-fitting device and a power feeding device. The clamp press-fitting device has a pressurizing device, an upper clamp device, and a lower clamp device, and the pressurizing device is a hydraulic cylinder unit. The piston rod of the hydraulic cylinder part has a holding part for attaching the lower clamp device to the tip part, the cylinder body of the hydraulic cylinder part has a holding part for attaching the upper clamp device to the lower end part, The holding mechanism portion has a reaction force receiving portion on the upper surface, and is attached to the upper portion of the hydraulic cylinder portion. The upper clamp device and the lower clamp device have a plurality of clamp jaws and a hydraulic cylinder that moves the clamp jaws forward and backward. The upper clamp device is attached to the holding portion of the cylinder body via an insulating member, and the lower clamp device is attached to the holding portion provided on the piston rod via the insulating member. A plurality of welding electrodes attached to the tension ring via insulating members, and a plurality of welding transformers mounted on a carriage having an opening on one side, and when transporting a pipe to be joined, Hold the inner peripheral surface of the pipe to be joined by the lower clamp device, and hold the inner peripheral surface of the pipe to be joined by the upper clamp device when joining the pipe, and the inner circumference of the tube press-fitted into the ground by the lower clamp device A hydraulic cylinder that holds the surface and attaches the welding electrode of the power feeding device to the outer periphery of the joining portion of the pipe to be joined and the pipe press-fitted into the ground, while supplying power from the welding transformer to the welding electrode When the joint is driven and pressed repeatedly, the joint is pressurized, and when the joined pipe is press-fitted into the ground, the reaction force receiving part of the holding mechanism is pressed against the member that provides the reaction force. Drive the cylinder part to And repeating the release and the tube circumferential surface of the holding joint in amplifier device.
[0012]
The pipe joining / pressing method of the present invention is a pipe joining / pressing method using the above-mentioned pipe clamp press-fitting device, wherein the upper clamp device and the lower clamp device are inserted into the pipe to be joined, and the upper clamp device and Hold the inner peripheral surface of the pipe to be joined by the clamp device, move to the position of the pipe buried in the ground, move the pipe to be joined to the position of the pipe buried in the ground, and then the inside of the pipe to be joined by the upper clamp device Hold the peripheral surface, hold the inner peripheral surface of the pipe press-fitted into the ground with the lower clamp device, weld the joint, join the pipe, and then release the holding of the pipe by the upper clamp device and the lower clamp device Then, press the reaction force receiving part of the holding mechanism part against the reaction force applying member, and press and hold the joined pipe into the ground by driving the hydraulic cylinder part while repeatedly holding and releasing the inner peripheral surface of the pipe joined by the lower clamp device. It is characterized by doing.
[0013]
Another pipe joining / pressing method of the present invention is a pipe joining / pressing method using the pipe joining / pressing apparatus, wherein the clamp press-fitting apparatus is moved to the position of the pipe to be joined by the conveying device, Insert the clamp device and the lower clamp device into the pipe to be joined, hold the inner peripheral surface of the pipe to be joined by the upper clamp device and the lower clamp device, move to the position of the pipe embedded in the ground, and place the joined pipe on the ground After moving to the position of the buried pipe, hold the inner peripheral surface of the pipe to be joined with the upper clamp device, hold the inner peripheral surface of the pipe press-fitted into the ground with the lower clamp device, Are attached to the outer periphery of the joint between the pipe to be joined and the pipe press-fitted into the ground, and the hydraulic cylinder is driven while the power is supplied from the welding transformer to the welding electrode to separate the joint. After repeating, pressurize the joint, After the welding, the welding electrode is removed from the joined pipe, the holding of the pipe by the upper clamp device and the lower clamp device is released, the reaction force receiving part of the holding mechanism part is pressed against the reaction force applying member, and the lower clamp It is characterized in that the joined pipe is press-fitted into the ground by driving the hydraulic cylinder portion while repeatedly holding and releasing the inner peripheral surfaces of the pipe joined by the apparatus.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing the structure of a joining / pressing device for welding a steel pipe pile according to the present invention and press-fitting it into the ground. As shown in the figure, the joining / pressing device 1 includes a clamp press-fitting device 2 and a power feeding device 3. As shown in the sectional view of FIG. 2, the clamp press-fitting device 2 includes a pressurizing device 4, an upper clamp device 5, and a lower clamp device 6. The pressurizing device 4 has a hydraulic cylinder part 7, a displacement sensor 8 and a holding mechanism part 9. The hydraulic cylinder portion 7 is composed of a single rod type double acting cylinder, and includes a piston 10, a piston rod 11, a cylinder body 12, and a head portion 13. The piston 10 has a piston ring 14 on an outer peripheral portion, and a piston rod 10 is connected to a lower end portion. The piston rod 11 has a flange 15 that holds the lower clamp device 6 at the tip. The cylinder body 12 includes a cylinder block 16 and a rod cover block 17. The cylinder block 16 has a cylinder chamber 18 that is open at the upper end and reciprocates the piston 10 in the vertical direction. The rod cover block 17 is provided at the lower part of the cylinder block 16 and has a flange 19 for holding the upper clamp device 5 at the lower end. As shown in the cross-sectional view of FIG. 3, the upper clamp device 5 and the lower clamp device 6 include a plurality of, for example, six sets of clamp jaws 20 and a hydraulic cylinder 21 of a single rod type double acting cylinder that moves the clamp jaws 20 forward and backward. The upper clamp device 5 is fixed to a flange 19 provided on the rod cover block 17 of the cylinder body 12 via an insulating member, and the lower clamp device 6 is fixed to a flange 15 provided on the piston rod 11 via an insulating member. ing.
[0015]
An oil passage 22 that communicates with the cylinder chamber 18, an oil passage 23 that communicates with the hydraulic cylinder 21 of the upper clamp device 5, and an oil passage 24 that supplies hydraulic oil to the hydraulic cylinder 21 of the lower clamp device 6 are provided in the cylinder body 12. The piston rod 11 has an oil passage 25 communicating with the hydraulic cylinder 21 of the lower clamp device 6. The oil passage 24 provided in the cylinder body 12 and the oil passage 25 provided in the piston rod 11 are provided with a hydraulic hose 26. It is connected with. The head portion 13 seals the cylinder chamber 18, and the displacement sensor 8 is attached to the center portion. The distal end of the displacement sensor 8 is slidably inserted into the mounting holes of the piston 10 and the piston rod 11.
[0016]
The holding mechanism portion 9 has a reaction force receiving flange 27 on the upper surface, a heavy machine attachment 28 is attached to the center portion of the side surface by a pin mechanism 29, and a flange 30 on the lower surface is fixed to the upper surface of the head portion 13. A heavy machine arm 31 is attached to the heavy machine attachment 28. Further, the reaction force receiving flange 27 may have a pin mechanism so as to cope with irregularities such as an inclination of a member that applies the reaction force.
[0017]
As shown in the front view of FIG. 4A and the top view of FIG. 4B, the power feeding device 3 includes a plurality of welding electrodes 33 attached to a tension ring 32 having a fastening portion that can be opened and closed via an insulating member. And a plurality of welding transformers 35 mounted on a carriage 34 having an opening on one side. The welding electrode 33 has a magnet around the copper electrode. The welding electrode 33 and the welding transformer 35 are connected by a power cable 36.
[0018]
A construction method when the steel pipe piles 40 are sequentially welded and press-fitted into the ground 41 for repairing or reinforcing an existing structure using the joining / press-fitting device 1 will be described with reference to the process diagram of FIG. .
[0019]
As shown in FIG. 5 (a), the lower clamp device 6 and the upper clamp device 5 held by a heavy machine are inserted into a steel pipe pile 40b to join the lower clamp device 6 and the upper clamp device 5, and the lower clamp device 6 and the upper clamp device 5 are The hydraulic cylinder 21 is advanced to press the clamp jaw 20 against the inner wall of the steel pipe pile 40b, and the steel pipe pile 40b is held by the clamp press-fitting device 2. Then, the clamp press-fitting device 2 holding the steel pipe pile 40b is moved by a heavy machine, and the steel pipe pile 40b to be joined is disposed above the steel pipe pile 40a press-fitted into the ground 41.
[0020]
Thus, since the inner wall of the steel pipe pile 40b is held by the lower clamp device 6 and the upper clamp device 5 of the clamp press-fitting device 2, the clamp press-fitting device 2 can be reduced in size and weight, and there is an existing structure 42 or the like. Can be easily moved to a different work space. Further, since the clamp press-fitting device 2 is inserted into the steel pipe pile 40b, the length of the steel pipe pile 40b can be increased.
[0021]
After the steel pipe pile 40b to be joined is arranged on the upper part of the steel pipe pile 40a press-fitted into the ground 41, the hydraulic cylinder 21 of the upper clamp device 5 and the lower clamp device 6 is moved backward to release the holding of the steel pipe pile 40b by the clamp press-fitting device 2 To do. Thereafter, as shown in FIG. 5B, the clamp press-fitting device 2 is lowered by a heavy machine, the lower clamp device 6 is disposed at the position of the steel pipe pile 40a press-fitted into the ground 41, and the steel pipe pile to which the upper clamp device 5 is joined. It is arranged at the position 40b. And the steel pipe pile 40a is hold | maintained with the lower clamp apparatus 6, and the steel pipe pile 40b joined with the upper clamp apparatus 5 is hold | maintained. In this state, as shown in FIG. 4, welding electrodes 33 attached to the tension ring 32 via insulating members are respectively attached to the outer peripheral surfaces of the steel pipe pile 40 a and the steel pipe pile 40 b in the vicinity of the joint portion. The mounted welding transformer 35 is moved to the positions of the steel pipe piles 40a and 40b, and the secondary side of each welding electrode 33 and the welding transformer 35 is connected by the power cable 36. When the welding electrode 33 is attached to the steel pipe piles 40a and 40b, the welding electrode 33 can be securely adhered to the steel pipe piles 40a and 40b by the elastic force of the tension ring 32 and the magnet provided on the welding electrode 33. .
[0022]
Then, the welding transformer 35 is connected to the primary power source, and the piston 10 of the hydraulic cylinder portion 7 is driven to supply the steel pipe pile 40a while supplying the low-voltage and large-current power from the welding transformer 35 to the welding electrode 33. The steel pipe piles 40b are brought into contact with and separated from each other to heat the joints intensively. When the joint portion reaches a sufficiently high temperature, the contact portion between the steel pipe pile 40a and the steel pipe pile 40b is abruptly pressed (upset) by the hydraulic cylinder portion 7 to press the steel pipe pile 40a and the steel pipe pile 40b.
[0023]
When pressing the steel pipe pile 40a and the steel pipe pile 40b, it is necessary to firmly clamp the steel pipe pile 40a and the steel pipe pile 40b in order to perform proper upset. Upset force is required to be about 30-50 N / mm 2 per cross-sectional area of the members to be joined. For example, the cross-sectional area of the steel pipe pile 40a and steel pipe piles 40b is the is 20000 mm 2, the required upset force becomes 600 kN-1000 kN. The pressurizing capacity of the hydraulic cylinder unit 7 is determined based on the upset force, and the clamping force of the upper clamp device 5 and the lower clamp device 6 is determined. Moreover, when the hydraulic cylinder part 7 pressurizes the contact part of the steel pipe pile 40a and the steel pipe pile 40b rapidly, it is comprised so that the speed | rate of 30 mm / sec or more can be implement | achieved.
[0024]
Moreover, since the steel pipe pile 40a and the steel pipe pile 40b are joined by flash welding, there is no need for the welding engineer to monitor the joint, and the welding electrode 33 attached to the steel pipe pile 40a is close to the ground 41 of the steel pipe pile 40a. The steel pipe pile 40a can be press-fitted until the upper end reaches the vicinity of the ground 41, and the length of the steel pipe pile 40b can be made longer.
[0025]
After joining the steel pipe pile 40a and the steel pipe pile 40b, the holding of the steel pipe pile 40 by the upper clamp device 5 and the lower clamp device 6 is released, and the clamp press-fitting device 2 is raised by a heavy machine as shown in FIG. 5 (c). Then, the reaction force receiving flange 27 of the holding mechanism portion 9 is pressed against a member that becomes a reaction force such as the existing structure 42. Here, the clamp press-fitting device 2 may be raised by driving the hydraulic cylinder portion 7 while alternately holding and releasing the upper clamp device 5 and the lower clamp device 6 alternately. Then, the welding electrode 33 is removed from the steel pipe piles 40a and 40b, and the carriage 34 having the welding transformer 35 is moved backward.
[0026]
In this state, as shown in FIG.5 (d), the steel pipe pile 40b is hold | maintained with the lower clamp apparatus 6, the piston 10 of the hydraulic cylinder part 7 is lowered | hung, the piston rod 11 is extended below, and it is made into the steel pipe pile 40b. The steel pipe pile 40a and the steel pipe pile 40b are press-fitted into the ground 41 by applying a downward force. After extending the piston rod 11 downward by the stroke of the hydraulic cylinder part 7, the holding of the steel pipe pile 40b by the lower clamp device 6 is released, the piston rod 11 is retracted, and the steel pipe pile 40b is held by the lower clamp device 6 again. Then, the press-fitting operation is repeated.
[0027]
In this way, the steel pipe piles 40a and 40b are press-fitted into the ground 41 while repeatedly holding and releasing the steel pipe pile 40b by the lower clamp device 6, so that the press-fitting amount of the steel pipe piles 40a and 40b exceeds the stroke of the hydraulic cylinder part 7. Even in this case, it is not necessary to add a press-fitting spacer, and the man-hour for the press-fitting process can be greatly reduced and the construction time can be shortened.
[0028]
Moreover, although the said description demonstrated the case where the steel pipe pile 40 was joined and press-fit in the ground 41, even if it is a hollow cross section, it applies similarly, even if it is a concrete member, such as a PC pile which has a steel member only in the edge part. Can do.
[0029]
Moreover, although the said description demonstrated the case where the steel pipe pile 40a and the steel pipe pile 40b were joined by flash welding, when there is room in the space | interval to the member 41 which becomes reaction force, such as the existing structure 42, and the ground 41, the steel pipe pile 40a. The steel pipe pile 40b may be welded by a welding robot or the like. In such a case, the holding and press-fitting of the steel pipe piles 40a and 40b can be facilitated by using the clamp press-fitting device 2.
[0030]
【The invention's effect】
As described above, since the inner peripheral surface of the pipe is held by the lower clamp device and the upper clamp device of the clamp press-fitting device, the clamp press-fitting device can be reduced in size and weight, and there are existing structures and the like. It can be easily moved to a narrow work space.
[0031]
In addition, since the clamp press-fitting device is inserted into the pipe, the unit length of the pipe used in a narrow work space can be increased, and the number of joints can be reduced by reducing the number of joints.
[0032]
Furthermore, by joining the unit length pipes by flash welding, it is not necessary for the welding engineer to monitor the joints, and the upper end of the press-fitting into the ground can be press-fitted until reaching the ground. The unit length of the tube can be made longer.
[0033]
Also, when the pipe is press-fitted into the ground, the press-fitting amount of the pipe exceeds the stroke of the hydraulic cylinder part by driving the hydraulic cylinder part while repeatedly holding and releasing the pipe with the lower clamp device and press-fitting into the ground. Even in this case, it is not necessary to add a press-fitting spacer, and the man-hour for the press-fitting process can be greatly reduced to shorten the construction time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a joining / pressing device for welding steel pipe piles and press-fitting into a ground.
FIG. 2 is a cross-sectional view showing a configuration of a clamp press-fitting device.
FIG. 3 is a cross-sectional view showing configurations of an upper clamp device and a lower clamp device.
FIG. 4 is a configuration diagram of a power feeding device.
FIG. 5 is a process diagram showing each process of conveyance and joining of steel pipe piles and press-fitting to the ground.
FIG. 6 is a process diagram showing a press-fitting process of a conventional example.
[Explanation of symbols]
1; Joining and press-fitting device, 2; Clamp press-fitting device, 3; Power feeding device,
4; pressurizing device, 5; upper clamping device, 6; lower clamping device,
7; Hydraulic cylinder part, 8; Displacement sensor, 9; Holding mechanism part, 10; Piston,
11; piston rod, 12; cylinder body, 13; head portion,
14; piston ring, 15; flange, 16; cylinder block,
17; Rod cover block, 18; Cylinder chamber, 19; Flange,
20; clamp jaw, 21; hydraulic cylinder,
22, 23, 24, 25; oil passage, 26; hydraulic hose,
27; Flange for reaction force receiving; 28; Heavy equipment attachment; 29; Pin mechanism;
30; flange, 31; arm of heavy machinery, 32; tension ring,
33; welding electrode, 34; carriage, 35; welding transformer,
36; power cable, 40; steel pipe pile, 41; ground, 42; existing structure.

Claims (4)

加圧装置と上クランプ装置及び下クランプ装置とを有し、
加圧装置は油圧シリンダ部と保持機構部を有し、油圧シリンダ部のピストンロッドは先端部に下クランプ装置を取り付ける保持部を有し、油圧シリンダ部のシリンダ胴は下端部に上クランプ装置を取り付ける保持部を有し、保持機構部は上面に反力受け部を有し、側面に搬送装置連結部を有し、油圧シリンダ部の上部に取り付けられ、
上クランプ装置と下クランプ装置は、複数のクランプジョーと、クランプジョーを前後退する油圧シリンダを有し、上クランプ装置はシリンダ胴の保持部に取り付けられ、下クランプ装置はピストンロッドに設けた保持部に取り付けられ、
接合する管を搬送するとき、上クランプ装置と下クランプ装置で接合する管の内周面を保持し、
管を接合するとき、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、
接合した管を地盤に圧入するとき、保持機構部の反力受け部を反力付与部材に押し当てて油圧シリンダ部を駆動して、下クランプ装置で接合した管内周面の保持と解除を繰り返すことを特徴とする管のクランプ圧入装置。A pressure device, an upper clamp device and a lower clamp device,
The pressurizing device has a hydraulic cylinder portion and a holding mechanism portion, the piston rod of the hydraulic cylinder portion has a holding portion for attaching a lower clamp device to the tip portion, and the cylinder body of the hydraulic cylinder portion has an upper clamp device at the lower end portion. Having a holding part to be attached, the holding mechanism part has a reaction force receiving part on the upper surface, a transport device connecting part on the side surface, and is attached to the upper part of the hydraulic cylinder part
The upper clamp device and the lower clamp device have a plurality of clamp jaws and a hydraulic cylinder that moves the clamp jaws forward and backward. The upper clamp device is attached to a holding portion of the cylinder body, and the lower clamp device is a holding provided on the piston rod. Attached to the
When transporting the pipe to be joined, hold the inner peripheral surface of the pipe to be joined by the upper clamp device and the lower clamp device,
When joining the pipe, hold the inner peripheral surface of the pipe to be joined with the upper clamp device, hold the inner peripheral surface of the pipe press-fitted into the ground with the lower clamp device,
When press-fitting the joined pipe into the ground, the reaction force receiving part of the holding mechanism part is pressed against the reaction force applying member to drive the hydraulic cylinder part, and the holding and release of the pipe inner peripheral face joined by the lower clamp device is repeated. A tube clamp press-fitting device characterized by that. クランプ圧入装置と給電装置とを有し、
クランプ圧入装置は、加圧装置と上クランプ装置及び下クランプ装置とを有し、
加圧装置は油圧シリンダ部と保持機構部を有し、油圧シリンダ部のピストンロッドは先端部に下クランプ装置を取り付ける保持部を有し、油圧シリンダ部のシリンダ胴は下端部に上クランプ装置を取り付ける保持部を有し、保持機構部は上面に反力受け部を有し、油圧シリンダ部の上部に取り付けられ、
上クランプ装置と下クランプ装置は、複数のクランプジョーと、クランプジョーを前後退する油圧シリンダを有し、上クランプ装置はシリンダ胴の保持部に絶縁部材を介して取り付けられ、下クランプ装置はピストンロッドに設けた保持部に絶縁部材を介して取り付けられ、
給電装置は、テンションリングに絶縁部材を介して取り付けられた複数の溶接用電極と、一方に開口部を有する台車に搭載した複数の溶接用トランスを有し、
接合する管を搬送するとき、上クランプ装置と下クランプ装置で接合する管の内周面を保持し、
管を接合するとき、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、給電装置の溶接用電極を、接合する管と地盤に圧入されている管の接合部近傍の外周部にそれぞれ取り付け、溶接用トランスから溶接用電極に電力を供給しながら油圧シリンダ部を駆動して接合部の離接を繰り返したのち接合部を加圧し、
接合した管を地盤に圧入するとき、保持機構部の反力受け部を反力を付与する部材に押し当てて油圧シリンダ部を駆動して下クランプ装置で接合した管内周面の保持と解除を繰り返すことを特徴とする管の接合・圧入装置。A clamp press-fitting device and a power feeding device;
The clamp press-fitting device has a pressurizing device, an upper clamp device and a lower clamp device,
The pressurizing device has a hydraulic cylinder portion and a holding mechanism portion, the piston rod of the hydraulic cylinder portion has a holding portion for attaching a lower clamp device to the tip portion, and the cylinder body of the hydraulic cylinder portion has an upper clamp device at the lower end portion. Having a holding part to be attached, the holding mechanism part has a reaction force receiving part on the upper surface, and is attached to the upper part of the hydraulic cylinder part;
The upper clamp device and the lower clamp device have a plurality of clamp jaws and a hydraulic cylinder that moves the clamp jaws forward and backward. The upper clamp device is attached to a holding portion of the cylinder body via an insulating member, and the lower clamp device is a piston. It is attached to the holding part provided on the rod via an insulating member,
The power feeding device has a plurality of welding electrodes attached to the tension ring via an insulating member, and a plurality of welding transformers mounted on a carriage having an opening on one side,
When transporting the pipe to be joined, hold the inner peripheral surface of the pipe to be joined by the upper clamp device and the lower clamp device,
When joining pipes, hold the inner peripheral surface of the pipe to be joined with the upper clamp device, hold the inner peripheral surface of the tube press-fitted into the ground with the lower clamp device, and join the welding electrode of the power feeding device It is attached to the outer periphery near the joint part of the pipe press-fitted into the pipe and the ground, and after joining and disconnecting the joint part repeatedly by driving the hydraulic cylinder part while supplying power from the welding transformer to the welding electrode Pressurize the part,
When the joined pipe is press-fitted into the ground, the reaction force receiving part of the holding mechanism part is pressed against the member that gives the reaction force, and the hydraulic cylinder part is driven to hold and release the inner peripheral surface of the pipe joined by the lower clamp device. A pipe joining and press-fitting device characterized by repetition. 請求項１記載の管のクランプ圧入装置を使用した管の接合・圧入方法であって、
上クランプ装置と下クランプ装置を接合する管内に挿入し、上クランプ装置と下クランプ装置で接合する管の内周面を保持して地盤に埋設した管の位置まで移動し、
接合する管を地盤に埋設した管の位置まで移動した後、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持して接合部を溶接し、
管を接合した後、上クランプ装置と下クランプ装置による管の保持を解除し、保持機構部の反力受け部を反力付与部材に押し当てて、下クランプ装置で接合した管内周面の保持と解除を繰り返しながら油圧シリンダ部を駆動して接合した管を地盤に圧入することを特徴とする管の接合・圧入方法。A pipe joining / pressing method using the pipe clamp press-fitting device according to claim 1,
Insert the upper clamp device and the lower clamp device into the pipe to be joined, hold the inner peripheral surface of the pipe to be joined by the upper clamp device and the lower clamp device, move to the position of the pipe embedded in the ground,
After moving the pipe to be joined to the position of the pipe embedded in the ground, hold the inner peripheral surface of the pipe to be joined with the upper clamp device, and hold the inner peripheral surface of the pipe press-fitted into the ground with the lower clamp device. Weld the joint,
After joining the tubes, the holding of the tube by the upper clamp device and the lower clamp device is released, the reaction force receiving portion of the holding mechanism is pressed against the reaction force application member, and the inner peripheral surface of the tube joined by the lower clamp device is held. A method for joining and press-fitting pipes, characterized in that the joined pipe is press-fitted into the ground by driving the hydraulic cylinder part while repeatedly releasing. 請求項２記載の管の接合・圧入装置を使用した管の接合・圧入方法であって、
クランプ圧入装置を搬送装置により接合する管の位置に移動し、上クランプ装置と下クランプ装置を接合する管内に挿入し、上クランプ装置と下クランプ装置で接合する管の内周面を保持して地盤に埋設した管の位置まで移動し、
接合する管を地盤に埋設した管の位置まで移動した後、上クランプ装置で接合する管の内周面を保持し、下クランプ装置で地盤に圧入されている管の内周面を保持し、給電装置の溶接用電極を、接合する管と地盤に圧入されている管の接合部近傍の外周部にそれぞれ取り付け、溶接用トランスから溶接用電極に電力を供給しながら油圧シリンダ部を駆動して接合部の離接を繰り返したのち接合部を加圧し、
管を接合した後、接合した管から溶接用電極を取り外し、上クランプ装置と下クランプ装置による管の保持を解除し、保持機構部の反力受け部を反力付与部材に押し当てて、下クランプ装置で接合した管内周面の保持と解除を繰り返しながら油圧シリンダ部を駆動して接合した管を地盤に圧入することを特徴とする管の接合・圧入方法。A pipe joining / pressing method using the pipe joining / pressing apparatus according to claim 2,
Move the clamp press-fitting device to the position of the pipe to be joined by the transfer device, insert the upper clamp device and the lower clamp device into the pipe to be joined, and hold the inner peripheral surface of the pipe to be joined by the upper clamp device and the lower clamp device. Move to the position of the pipe buried in the ground,
After moving the pipe to be joined to the position of the pipe embedded in the ground, hold the inner peripheral surface of the pipe to be joined with the upper clamp device, hold the inner peripheral surface of the pipe press-fitted into the ground with the lower clamp device, Attach the welding electrode of the power feeding device to the outer periphery near the joint of the pipe to be joined and the pipe press-fitted to the ground, and drive the hydraulic cylinder while supplying power from the welding transformer to the welding electrode. Pressurize the joint after repeating the separation of the joint,
After joining the pipe, remove the welding electrode from the joined pipe, release the holding of the pipe by the upper clamp device and the lower clamp device, press the reaction force receiving part of the holding mechanism part against the reaction force applying member, A method for joining and press-fitting pipes, characterized in that the joined pipes are press-fitted into the ground by driving the hydraulic cylinder part while repeatedly holding and releasing the inner peripheral surfaces of the pipes joined by the clamping device.
JP2002344768A 2002-11-28 2002-11-28 Pipe clamp press-fitting device, joining / press-fitting device and joining / press-fitting method Expired - Fee Related JP3805742B2 (en)

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CN110914499A (en) * 2017-04-07 2020-03-24 金圭相 Circular tube rotary insertion device adopting hydraulic jack expansion mode

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JP2013067994A (en) * 2011-09-22 2013-04-18 Sekkeishitsu Soil:Kk Jack to be installed inside steel pipe
KR101477227B1 (en) * 2013-01-03 2014-12-30 주식회사 투시파워 Electric pressure welding apparatus and method, and system using thereof
KR101727574B1 (en) * 2016-02-22 2017-04-17 김규상 Rotary penetration device of hydraulic jack type for circular pipe

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Publication number Priority date Publication date Assignee Title
CN110914499A (en) * 2017-04-07 2020-03-24 金圭相 Circular tube rotary insertion device adopting hydraulic jack expansion mode
CN110914499B (en) * 2017-04-07 2021-11-23 金圭相 Circular tube rotary insertion device adopting hydraulic jack expansion mode

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