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JP4084677B2 - Inclined pile construction platform with adjustable tilt, construction equipment for oblique pile equipped with the platform, and construction method of oblique pile using rotary press-fit steel pipe pile - Google Patents
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JP4084677B2 - Inclined pile construction platform with adjustable tilt, construction equipment for oblique pile equipped with the platform, and construction method of oblique pile using rotary press-fit steel pipe pile - Google Patents

Inclined pile construction platform with adjustable tilt, construction equipment for oblique pile equipped with the platform, and construction method of oblique pile using rotary press-fit steel pipe pile Download PDF

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Publication number
JP4084677B2
JP4084677B2 JP2003046848A JP2003046848A JP4084677B2 JP 4084677 B2 JP4084677 B2 JP 4084677B2 JP 2003046848 A JP2003046848 A JP 2003046848A JP 2003046848 A JP2003046848 A JP 2003046848A JP 4084677 B2 JP4084677 B2 JP 4084677B2
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Japan
Prior art keywords
pile
steel pipe
rotary press
pipe pile
construction
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JP2003046848A
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JP2004257044A (en
Inventor
章 小松
孝佳 福村
啓悟 武川
浩司 豊福
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Nippon Steel Corp
Nippon Steel Engineering Co Ltd
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Nippon Steel Corp
Nippon Steel Engineering Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、鉄塔,道路,橋梁等の構造物あるいは建築物等の構造物を支持するために地盤に圧入される回転圧入鋼管杭からなる斜杭を施工するための傾斜調整可能な斜杭施工用架台およびその架台を備えた斜杭の施工装置ならびに回転圧入鋼管杭を用いた斜杭の施工方法に関する。
【0002】
【従来の技術】
従来、全旋回オールケーシング掘削機などの鋼管杭回転圧入装置を使用して、鋼管杭を回転させながら地盤に直角に圧入施工することは、一般に行なわれていると共に、特許文献1(特開平2002−167760号公報)にも記載されているように知られているが、鋼管杭を地盤に対して傾斜した状態で、回転させながら圧入することは知られていない。
特に、鋼管杭の周側面に螺旋状羽根または翼を有する回転圧入用鋼管杭については、回転圧入用鋼管杭を傾斜した状態で、地盤に回転圧入施工することは、行なわれていない。
【0003】
【特許文献1】
特開平2002−167760号公報
【0004】
【発明が解決しようとする課題】
傾斜した状態で回転圧入用鋼管杭を全旋回オールケーシング掘削機等の鋼管杭回転圧入装置にセットすることが困難であるという問題があると共に、回転圧入用鋼管杭を地盤に対して傾斜した状態で保持しながら地盤に圧入するためには、鋼管杭回転圧入装置を傾斜した状態で支持する装置が必要である等の問題がある。また、施工を容易にするための簡単な構造の傾斜調整可能な斜杭施工用架台の出現が望まれている。
【0005】
本発明者は、前記の問題に対して、種々熟考した結果、複数のジャッキを備え、傾斜角度調整可能な架台を介して鋼管杭回転圧入装置を支持することにより、鋼管杭回転圧入装置を容易に鉛直状態または傾斜状態で支持でき、施工が簡単になる点、および回転圧入用鋼管杭を全旋回オールケーシング掘削機等の鋼管杭回転圧入装置にセットした後、鋼管杭回転圧入装置を傾斜した状態で支持することにより、容易に回転圧入用鋼管杭を地盤に対して傾斜した状態で回転圧入することができることを知見し、本発明を完成させた。
【0006】
本発明は、鋼管杭を地盤(または水平面)に対して傾斜した状態で、回転させながら圧入施工することが可能な斜杭の施工方法およびその施工装置ならびに傾斜調整可能な斜杭施工用架台を提供することを目的とする。
【0007】
【課題を解決するための手段】
前記問題点を解決するため、請求項1の傾斜調整可能な斜杭施工用架台においては、回転圧入鋼管杭1を地盤3に傾斜した状態で回転圧入するために使用され、かつ鋼管杭回転圧入装置2を傾斜調整可能に支持するために使用される斜杭施工用架台であって、架台本体20に、伸縮式ジャッキ12を有する複数の伸縮式脚部7を前後方向および左右方向に間隔をおいて備えていると共に、架台本体20の中央部に鋼管杭挿通孔9を備えていることを特徴とする。
【0008】
また、請求項2の発明においては、請求項1に記載の斜杭施工用架台において、斜杭施工用架台5の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置2の下部に係合させるための複数の係合部15が設けられていることを特徴とする。
【0009】
さらに、請求項3の斜杭施工装置においては、請求項1または2の傾斜調整可能な斜杭施工用架台5上に鋼管杭回転圧入装置2が設置されていることを特徴とする。
【0010】
さらにまた、請求項4の発明においては、請求項3に記載の斜杭施工装置において、斜杭施工用架台5の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置2の下部に係合させるための複数の係合部15が設けられていることを特徴とする。
【0011】
なおまた、請求項5の発明においては、請求項4に記載の斜杭施工装置において、地盤3上に配置された鋼管杭挿通孔9を有する座板18上に、請求項1または2の斜杭施工用架台5の下部が係合載置され、かつ斜杭施工用架台5上に鋼管杭回転圧入装置2の下部が係合載置されていることを特徴とする。
【0012】
また、請求項6の斜杭の施工方法においては、請求項3〜5のいずれかに記載の斜杭施工装置を使用して、回転圧入鋼管杭1を鋼管杭回転圧入装置2により把持した後、斜杭施工用架台5における各伸縮式脚部7を伸縮調整して、斜杭施工用架台5を傾斜状態とすることにより、鋼管杭回転圧入装置2を傾斜した状態にすると共に、鋼管杭回転圧入装置2に把持された回転圧入用鋼管杭1を傾斜した状態に保持し、次いで鋼管杭回転圧入装置2を駆動して回転圧入鋼管杭1を傾斜した状態で地盤3に回転させながら圧入することを特徴とする。
【0013】
【発明の実施の形態】
以下、本発明の一実施形態を図面を参照しながら具体的に説明する。
先ず、本発明の施工方法において使用する一実施形態の傾斜調整可能な斜杭施工用架台について、図7および図8を参照しながら説明する。図7および図8は、本発明の傾斜調整可能な斜杭施工用架台5を示すものであって、図7は平面図であり、図8は側面図である。
【0014】
図7に示すように、平面矩形状等の鋼製架台本体20およびその本体20における鋼製上面板23の中央部には、上下方向に貫通する鋼管杭挿通用透孔9が設けられていると共に、前記鋼製上面板23の4隅部近傍には、上面板23の周囲に沿って、前後方向に間隔をおくと共に、左右方向に間隔をおいて、鋼板製の横方向のずれ止め部材24が溶接等により固着されている。
【0015】
この横方向のずれ止め部材24は、全旋回オールケーシング掘削機などにおける鋼管杭回転圧入装置2の脚座25の横方向のずれ止めを図り、また、図7に2点鎖線で示すように、前記脚座25が載置された後、その上動または横方向のずれ止めを図るために、前記脚座25の上面に一辺(上部)が近接するようにL形鋼板からなる後付けのずれ止め部材26の他片(下部)を上面板23に溶接等により固着する。
【0016】
前記架台本体20の前後の側面部には、左右方向に間隔をおいて液圧式等の複数(図示の場合は4つ)の伸縮式ジャッキ12が配置されていると共に、各ジャッキ12におけるケーシング13側がボルト等により架台本体20に固定されている。前記の伸縮式ジャッキ12の配置位置は、その中心軸線が、鋼管杭回転圧入装置2の各脚部の配置位置よりも、前後方向および左右方向において外側に位置するようにすると、鋼管杭回転圧入装置2を載置し、架台5を傾斜状態としても安定性がよい。
【0017】
前記各伸縮式ジャッキ12は、架台本体20の左右方向の取り付け間隔が大きくなるので、架台本体20を適宜の角度に設定する上で、ジャッキストロ−クの大きくとれるジャッキ、例えば油圧伸縮式ジャッキを使用するとよい。
【0018】
また、前記伸縮式ジャッキ12におけるピストン杆12bの先端部は、半球状部12cが一体に設けられ、前記半球状部12cには、ほぼ半球状受け面12dを有する鋼製脚座12eが回動可能に取り付けられている。
【0019】
前記伸縮式ジャッキ12と、前記脚座12eとにより、傾斜調整可能な架台側のアウトリガー12a等の伸縮式脚部7が構成されている。
【0020】
この実施形態では、前記各伸縮式ジャッキ12の伸長量または短縮量を調整することにより、斜杭施工用架台5を適宜の傾斜角度に設定することができる。
【0021】
前記上面板23とずれ止め部材24により支持部8が構成され、これに後付けのずれ止め26により、傾斜調整可能な斜杭施工用架台5側の係合部15が構成されている。
【0022】
前記傾斜調整可能な斜杭施工用架台5の傾斜角は、施工条件にもよるが、25度以下で、適宜設定するとよい。
【0023】
次に、図1および図2では詳細な図示を省略するが(詳細は図6参照)、鋼製座板本体18aの4隅部にも、前記係合部15の構成と同様に、ずれ止め部材(図示を省略するが、前記符号24に相当する部材)を予め固定し、また後付けずれ止め部材26を固定して構成される係合部15aを備えていると共に、座板本体18aの中央部に、杭挿通孔18bが設けられて構成されている座板18が地盤3に設置され、前記傾斜調整可能な斜杭施工用架台5の脚座12eは、座板18側のずれ止め部材の内側に配置された状態で載置され、後付けずれ止め部材26が座板18に固定されて、係合部15aに係合された状態で座板18に設置される。
【0024】
次に、前記の傾斜調整可能な斜杭施工用架台5を使用して、回転圧入用鋼管杭1を傾斜した状態で、地盤3に回転圧入する場合について、図1および図2を参照しながら、その施工方法および施工装置(一例としての全旋回オールケーシング掘削機2の構造説明は後記する。)と共に説明する。
【0025】
まず、適宜クローラクレーン等のクレーン6を使用して、地盤3上に、前記座板18を配置する。そして、図1(a)に示すように、座板18上面における4隅のずれ止め部材の内側に、それぞれ傾斜調整可能な架台5側の脚座12eが位置するように、本発明の傾斜調整可能な斜杭施工用架台5を載置すると共に、斜杭施工用架台5における脚座12eの上面に、後付けずれ止め部材26における一辺(上部側)が近接するように配置すると共に、前記後付けずれ止め部材26における他辺を座板18に溶接等により固定して、前記脚座12eを係合部15aに係合させる。
【0026】
なお、前記実施形態の係合部15aにおいては、斜杭施工用架台5におけるアウトリガー12aを伸縮して斜杭施工用架台5を傾斜させる場合、すなわち伸縮式ジャッキ12におけるケーシング13側が固定される形態であるため、左右方向のいずれか一方の半球状部12cを中心として架台5が傾斜した状態では、他方の伸縮式ジャッキ12を伸長すると、他方の半球状部12cは、外側に若干偏心するので、これに対応するため、前記のずれ止め部材と前記脚座12eとの間、および後付けずれ止め部材26における他辺と前記脚座12eとの間には、若干の隙間を設けるようするとよく、後付けのずれ止め部材26は架台5の傾斜調整後に座板18に固定するようにしてもよい。
【0027】
このように、斜杭施工用架台5におけるアウトリガー12aを伸縮して斜杭施工用架台5を傾斜させる場合に、アウトリガー12aの先端部が左右方向に若干変位するので、前記座板18における係合部15aと斜杭施工用架台5における脚座12eとの間には、横方向に若干の余裕を持たせるようにしておく。
【0028】
このようして、座板18上に、傾斜調整可能な斜杭施工用架台5を、各アウトリガー12aを伸縮作動していない状態で、座板18上に設置する。
【0029】
次いで、図7に示すように、この水平状態の傾斜調整可能な斜杭施工用架台5の上面における4隅近傍のずれ止め部材24の内側に、それぞれ脚座25が位置するように、全旋回オールケーシング掘削機からなる鋼管杭回転圧入装置2の各脚座25を載置すると共に、鋼管杭回転圧入装置2の脚座25のずれ止めを図るために、前記と同様に後付けのずれ止め部材26を前記傾斜調整可能な斜杭施工用架台5の上面板23に固定し、鋼管杭回転圧入装置2と傾斜調整可能な斜杭施工用架台5の係合を図る。
【0030】
次いで、図1の(b)に示すように、この状態の全旋回オールケーシング掘削機からなる鋼管杭回転圧入装置2に装着すべく、回転圧入用鋼管杭1をクレーン6により吊り下げ支持させると共に、図1の(c)(および図 )に示すように、下端部に螺旋状翼または螺旋状羽根14等を有する回転圧入用鋼管杭1の下部を、前記鋼管杭回転圧入装置2にけるスパイラルカラー27に、前記回転圧入用鋼管杭1を回転させながら降下させて、鋼管杭1の螺状羽根部分14を通過させた後、鋼管杭1を鋼管杭回転圧入装置2におけるチャック28により把持して保持する。なお、前記回転圧入用鋼管杭1はクレーン6における係止フックに条体29を介して支持されている。
【0031】
次いで、図2の(d)に示すように、傾斜調整可能な斜杭施工用架台5における各伸縮式ジャッキ12を伸縮駆動して、前記斜杭施工用架台5を所定角度の傾斜状態にする。これにより、鋼管杭回転圧入装置2および回転圧入用鋼管杭1は、地盤3または水平面に対して傾斜した状態に配置されることになる。
【0032】
次いで、前記鋼管杭回転圧入装置2の一端側に、鋼製反力バー30の一端部が横軸31により連結され、鋼製反力バー30の先端部をクレーン6の車体32に係合させて、鋼管杭回転圧入装置2により回転圧入用鋼管杭1を回転させる時の回転反力を、前記クレーン6により受けるようにしている。
【0033】
なお、鋼製反力バー30の基端側が地盤面よりも下位レベルになる場合は、鋼製反力バー30下面の地盤3を適宜掘り下げる。また、鋼製反力バー30の先端部をクレーン6の車体32に固定のブラッケト等に横軸により連結するようにしてもよい(図示を省略した。)。
【0034】
この状態で、図2の(e)に示すように、鋼管杭回転圧入装置2を駆動すると共に、回転圧入用鋼管杭1に、鋼管杭回転圧入装置2の上載荷重をかけながら地盤3に、回転圧入する。前記の上載荷重は、螺旋状羽根14が地盤3に貫入させるために、上載荷重を付加する必要がある。また、鋼管杭回転圧入装置2における傾斜角度調整用ジャッキ34を作用させて、鋼管杭回転圧入装置2の傾斜角度を調整することにより、回転圧入用鋼管杭1の傾斜角度を微修正または微調整することができる。
【0035】
前記の上載荷重は、螺旋状羽根14が地表面下に入るまで、羽根による推進力が生じないので、貫入初期には、鋼管杭回転圧入装置2の自重の上載荷重を必要とするが、貫入後では、地盤のN値にもよるが、全旋回オールケーシング掘削機等の鋼管杭回転圧入装置2のみの一定の上載荷重またはさらに荷重を付加して行なうこともできる。
【0036】
なお、前記回転圧入用鋼管杭1を傾斜した状態で、回転圧入する場合、鋼管杭回転圧入装置2におけるジャッキ34を伸縮調整して、回転圧入用鋼管杭1の傾斜貫入角度を調整するようにしてもよい。
【0037】
鋼管杭回転圧入装置2により、一定の上載荷重を回転圧入用鋼管杭1に付加させながら、図2の(f)に示すように、所定の深度まで、回転圧入用鋼管杭1を回転圧入させて、圧入を完了させる。なお、図示を省略するが、回転圧入用鋼管杭1の上端部に新たな鋼管を溶接等により固着して、所定の深度に達する回転圧入用鋼管杭を圧入するようにしてもよい。
【0038】
なお、図2の(g)に示すように、地盤3に圧入された回転圧入用鋼管杭1を引き抜く場合には、鋼管杭回転圧入装置2により、回転圧入用鋼管杭1を逆回転させながら、ジャッキ38を伸長して引き抜き力を作用させると、回転圧入用鋼管杭1を容易に引き抜くことができる。
【0039】
次に、前記の鋼管杭回転圧入装置(全旋回オールケーシング掘削機)2の一例の構造について、図6を参照しながら簡単に説明すると、矩形環状のベースフレーム33の4隅部に、下部に脚座25を有する油圧式等の角度調整用ジャッキ34のシリンダ35が固定され、前記ジャッキ34の可動ピストン36の先端部に球継手19を介して脚座25が取り付けられている。
【0040】
また、前記ベースフレーム33上に、昇降フレーム37を昇降させるための複数(4本)の昇降ジャッキ38が立設され、前記昇降ジャッキ38を短縮することにより回転圧入用鋼管杭1を圧入するように構成されている。前記昇降フレーム37の上部には、チャックカラー昇降ジャッキ39が設けられている。また、昇降フレーム37の下部内側には、ベアリング40が設けられ、このベアリング40を介して、上方が拡径した内周テーパ面41が形成された回転体42が設けられている。前記回転体42の外周には、環状の外歯43が設けられ、その外歯43は中間歯車63を介して、昇降フレーム37に固定された回転体駆動用油圧モータ44の駆動歯車46に噛合している。
【0041】
前記回転体42の内方には、回転圧入鋼管杭1の鋼管部47を把持して回転するチャックカラー27が設けられている。チャックカラー27には、カラー支持ブロック48がボルト48aにより固着されており、カラー支持ブロック48の外面には、これにクサビ機能を付与すべく、上方が拡径したテーパ面49が形成されていて、このテーパ面49を回転体42の上部が拡径した内周テーパ面41とスライド可能に接触させることで、クサビ機構50を構成している。
【0042】
チャックカラー27には、図6に示すように、回転圧入鋼管杭1の螺旋翼14と同ピッチの凹溝51を形成してある。そして、鋼管杭回転圧入装置2の上方より回転圧入鋼管杭1を吊り降ろし、螺旋翼14を凹溝51に沿わせて、回転圧入鋼管杭1を回転させながら螺入することで螺旋翼14をチャックカラー27の部位を通過させ、その後、チャックカラー27の先端の杭把持径調整治具52と、これに設けた高摩擦材料により押圧把持して回転圧入する。
【0043】
前記チャックカラー27は、円周方向に等間隔で複数(例えば8ヶ所)配置されていている。チャックカラー27は、立て長の箱型断面のチャック本体部53と、このチャック本体部53の前側板54に、上下板と両側板からなる箱型断面のチャックブラッケット部55を固着して構成される。チャックブラッケット部55は、各チャックカラー27毎に上下方向に位置をずらしながら所定の間隙を開けて上下に多段に設けることにより、円周方向に等間隔で設けた8個のチャックカラー27の全体の間隙が連続することで、回転圧入鋼管杭1の螺旋翼14と同ピッチの凹溝51が構成される。
【0044】
前記のように、斜杭施工用架台5を傾斜させて鋼管杭回転圧入装置2を傾斜させても、鋼管杭回転圧入装置2と傾斜調整可能な斜杭施工用架台5の係合状態は保持され、鋼管杭回転圧入装置2の回転反力は、鋼製反力バー30からなる反力伝達部材10を介して、クレーン6に伝達させることができる。
【0045】
また、前記の鋼管杭回転圧入装置2の4隅に配置された角度調整用ジャッキ34の伸縮量を調整することにより、鋼管杭回転圧入装置2の傾斜角度を適宜微調整することができ、さらに、前記ジャッキ34の可動ピストン36の先端部に、ほぼ球状部を有すると共に受け座がわに、半球状受け部を有する球継手19を介して脚座25が取り付けられているので、傾斜調整可能な斜杭施工用架台5に脚座25を安定した状態で載置することができる。
【0046】
前記のようにして、一本目の回転圧入用鋼管杭1を施工した後、これに新たな鋼管の下部を前記回転圧入用鋼管杭1の上端に溶接等により固着することにより、所定の長さの回転圧入用鋼管杭1からなる斜杭16を施工するようにしてもよい。
【0047】
回転圧入用鋼管杭1を所定の位置まで、回転圧入施工した後は、鋼管杭回転圧入装置2および傾斜調整可能な斜杭施工用架台5をそれぞれ、新たな施工場所に移動させて、前記と同様な手順により、回転圧入用鋼管杭1を回転圧入施工する。
【0048】
前記実施形態の場合は、傾斜調整可能な斜杭施工用架台5を使用し、鋼管杭回転圧入装置2の下部脚座25と、傾斜調整可能な斜杭施工用架台5の係合を、予め傾斜調整可能な斜杭施工用架台5に固定のずれ止め24と、後付けのずれ止め部材26により、鋼管杭回転圧入装置2の下部脚部25が係止されて、鋼管杭回転圧入装置2の横移動および上動を防止するようにされているが、図9〜図11次の実施形態の傾斜調整可能な斜杭施工用架台5のように、ピン62を着脱することにより、鋼管杭回転圧入装置2の脚部を着脱可能に係合部15に係合させることができるので、この形態について説明する。
【0049】
図9〜図11は、傾斜調整可能な斜杭施工用架台5の変形形態およびこれを使用した斜杭施工装置を示すものであって、この実施形態の斜杭施工用架台5では、ほぼ直方体状の架台本体20の4隅部近傍に、座板56および着脱自在なピン62を備えた複数のずれ止め部材本体57を同じ向きに設けて係合部15が構成されている。その他の構成は、前記実施形態と同様であるので、同様な部分には、同様な符号を付して相違する部分について主に説明する。
【0050】
架台本体20の中央部には、鋼管杭挿通用透孔9を備えていると共に、架台本体20における上面板23の4隅部近傍付近には、係合部15を形成するための鋼製円盤状の座板56が溶接等により固定されている。
【0051】
前記座板56の上面に、半円状部を有する平面ほぼU字状で、断面がほぼL字状のずれ止め部材本体57の脚部58が溶接により固定され、前記脚部58の上部に一体に内向きのフランジ59が設けられている。
【0052】
前記ずれ止め部材本体57における半円状部の直径は、鋼管杭回転圧入装置2における脚部25の直径より若干大きく設定され、また前記U字状部分の解放側の各先端部上面には、対向するように鋼製ブラケット60が溶接により固定され、前記各ブラケット60にピン挿通用透孔61が設けられ、各ブラケット60のピン挿通用透孔61に渡って、着脱自在なピン62が設けられて、着脱自在に係止可能な係合部15が構成されている。
【0053】
この架台5に鋼管杭回転圧入装置2における脚座25を係止する場合には、前記ピン62を外した状態で、脚座25を載置した(なお、架台5または鋼管杭回転圧入装置2側を適宜、横移動させて係合させる)後、ピン62を架設して行なう。前記ピン62と脚部58と上部フランジ59により、鋼管杭回転圧入装置2における脚座25の横方向移動および上動のずれ止めを図るようにしている。
【0054】
また、前記傾斜調整可能な斜杭施工用架台5の脚座12eは、矩形状鋼板からなる座板18における係合部15aに着脱自在に係合されている。この実施形態の係合部15aは着脱可能な係合部であり、傾斜調整可能な斜杭施工用架台5側の着脱係止可能な係合部15と同様な構成とされている。
【0055】
すなわち、座板18の4隅部近傍の上面に、前記と同様な座板56が溶接により固定され、前記座板56の上面に、半円状部を有する平面ほぼU字状で、断面がほぼL字状のずれ止め部材本体57の脚部58が溶接により固定され、前記脚部58の上部に一体に内向きのフランジ59が設けられている。
【0056】
前記ずれ止め部材本体57における半円状部の直径は、傾斜調整可能な斜杭施工用架台5における脚座12eの直径より若干大きく設定され、また前記U字状部分の解放側の各先端部上面には、対向するように鋼製ブラケット60が溶接により固定され、前記各ブラケット60にピン挿通用透孔61が設けられ、各ブラケット60のピン挿通用透孔61に渡って、着脱自在なピン62が設けられて、着脱自在に係止可能な係合部15aが構成されている。
【0057】
この座板18に傾斜調整可能な斜杭施工用架台5における脚座12eを係止する場合には、前記ピン62を外した状態で、脚座12eを載置した(なお、架台5または座板18側を適宜、横移動させて係合させる)後、ピン62を架設して行なう。前記ピン62と脚部58と上部フランジ59により、斜杭施工用架台5における脚座12eの若干の横方向移動を許容しながら、脚座12eの横方向移動許容しながらの係合および上動のずれ止めを図るようにしている。
【0058】
前記実施形態でも説明したように、この実施形態でも、伸縮式ジャッキ12のケーシング13を架台本体20に固定する形態であるので、架台本体20に固定されている左右方向の一方側の伸縮式ジャッキ12側の下部を中心とし、左右方向他方側の伸縮式ジャッキ12を伸長すると、前記他方の側の伸縮式ジャッキ12の先端部が若干外側(左右方向の他方側)に偏心するようになるので、この偏心量を許容するように構成されている。
【0059】
この架台5を使用して、鋼管杭回転圧入装置2を設置する場合には、図10に示すように、地盤3上に載置された鋼製座板18の左右の各ずれ止め部材内に位置するように、斜杭施工用架台5を前記座板18に載置し、ピン61を取外した状態で、斜杭施工用架台5の脚座12eを座板18側のずれ止め部材本体57内に配置して載置し、ピン61を装着して、斜杭施工用架台5と座板18の係合を図り、また、鋼管杭回転圧入装置2の脚座25を斜杭施工用架台5側のずれ止め部材本体57内に配置して載置し、ピン61を装着して、斜杭施工用架台5と鋼管杭回転圧入装置2の係合を図る。(図10参照)
【0060】
次いで、前記実施形態と同様に、図1,2に示すような手順により、全旋回オールケーシング掘削機からなる鋼管杭回転圧入装置2に回転圧入用鋼管杭1を建て込むと共に、鋼管杭回転圧入装置2により把持した後、斜杭施工用架台5を所定の傾斜角度に傾斜させて、鋼管杭回転圧入装置2を駆動して、回転圧入用鋼管杭1を傾斜した状態で地盤3に回転させながら圧入する。
【0061】
前記実施形態の場合には、地盤3上の座板18に傾斜調整可能な斜杭施工用架台5を載置するようにしているが、鋼板製の支持台上に傾斜調整可能な斜杭施工用架台5を載置するようにしてもよい。図4、7に示すずれ止め手段に代えて、図9以降に示す形態のずれ止め手段を採用するようにしてもよく、また、図9以降に示す形態のずれ止め手段に代えて、傾斜調整可能な斜杭施工用架台5に採用したずれ止め手段を採用するようにしてもよく、あるいは組み合わせてもよい。
【0062】
前記実施形態の場合には、クサビ式の全旋回オールケーシング掘削機からなる鋼管杭回転圧入装置2を示したが、鋼管杭回転圧入装置2としては、バンド式に回転圧入用鋼管杭1を把持する鋼管杭回転圧入装置を使用するようにしてもよく、これ以外にも、他の適宜の鋼管杭回転圧入装置を使用するようにしてもよい。また、回転圧入用鋼管杭1についても同様に回転圧入用鋼管杭を使用するようにしてもよい。
【0063】
なお、前記実施形態においては、傾斜した状態の斜杭を地盤に回転圧入施工する場合について説明したが、平版状の座板では対応できないような段差あるいは不陸の大きな地盤に対して、杭を鉛直状態または傾斜状態で施工する場合にも、本発明の斜杭施工用架台は使用することができる。このような場合には、各脚部ごとにその下端部に対応する座板を設置するようにすればよい。
【0064】
【発明の効果】
本発明の請求項1の斜杭施工用架台によると、架台本体に、伸縮式ジャッキを有する複数の伸縮式脚部を前後方向および左右方向に間隔をおいて備えていると共に、架台本体の中央部に鋼管杭挿通孔を備えている簡単な構成であるので、容易に安価な斜杭施工用架台とすることができ、鋼管杭回転圧入装置を傾斜調整可能に支持して、斜杭の施工を容易にすることができる。
【0065】
また、請求項2のように、斜杭施工用架台の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置の下部に係合させるための複数の係合部が設けられていると、斜杭施工用架台上に鋼管杭回転圧入装置の下部を容易に係合させて設置することができ、鋼管杭回転圧入装置を安定した状態で支持することができる。
【0066】
また、請求項3の斜杭施工装置によると、伸縮式ジャッキを有する複数の伸縮式脚部を備えていると共に、中央部に鋼管杭挿通孔を備えている傾斜調整可能な斜杭施工用架台上に鋼管杭回転圧入装置が設置されているので、斜杭施工用架台と鋼管杭回転圧入装置を組み合わせる簡単な構成の斜杭施工装置とすることができる。また特に、傾斜調整可能な斜杭施工用架台を使用しているので、斜杭施工用架台の上面を水平状態にして鋼管杭回転圧入装置の設置が容易であると共に、鋼管杭回転圧入装置を設置後に、単に斜杭施工用架台を傾斜状態とすることにより、鋼管杭回転圧入装置を容易に傾斜状態とすることができる。
【0067】
また、請求項4のように、斜杭施工用架台5の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置2の下部に係合させるための複数の係合部15が設けられていると、斜杭施工用架台上に鋼管杭回転圧入装置の下部を容易に係合させて設置することができ、鋼管杭回転圧入装置を安定した状態で支持することができる。
【0068】
また、請求項5のようにすると、斜杭施工用架台の下部と地盤上の座板との係合および斜杭施工用架台と鋼管杭回転圧入装置の下部との係合が容易であり、地盤上座板から鋼管杭回転圧入装置までの係合一体化が容易であり、このように一体化された装置によって支持される回転圧入用鋼管杭は安定性がよく、比較的精度よく、回転圧入鋼管杭を地盤に回転圧入あるいは回転引き抜くことができる。
【0069】
また、請求項6の発明によると、従来困難であった回転圧入用鋼管杭を斜めに傾斜した状態で地盤に、容易に回転圧入することができるため、回転圧入用鋼管杭からなる斜杭を容易に施工することができる。また、全旋回オールケーシング掘削機等の鋼管杭回転圧入装置を使用しているので、この装置の利点である、低騒音,低振動の施工できる点の効果も得られる。
【0070】
また特に本発明においては、伸縮式ジャッキを有する複数の伸縮式脚部を備えていると共に、中央部に鋼管杭挿通孔を備えている傾斜調整可能な斜杭施工用架台を使用しているので、斜杭施工用架台の上面を水平状態にして鋼管杭回転圧入装置を容易に斜杭施工用架台に設置することができると共に、斜杭施工用架台を容易に傾斜状態とすることができ、その斜杭施工用架台を介して鋼管杭回転圧入装置を容易に鉛直状態または傾斜状態で支持することができ、したがって、回転圧入用鋼管杭を地盤に対して容易に傾斜した状態で回転圧入することができ、施工が簡単になり、ひいては、杭施工の工期および施工コストを低減することができる。
【図面の簡単な説明】
【図1】(a)〜(c)は本発明の斜杭の施工方法を実施して回転圧入用鋼管杭の施工手順を示す概略側面図である。
【図2】(d)〜(f)は図1の続きの手順を示す概略側面図であり、(h)は回転圧入用鋼管杭を引き抜く場合の概略側面図である。
【図3】傾斜調整可能な斜杭施工用架台に全旋回オールケーシング掘削機からなる鋼管杭回転圧入装置を傾斜した状態で設置すると共に、反力バーを配設した状態を示す側面図である。
【図4】図5の一部を拡大して示す側面図である。
【図5】鋼管杭回転圧入装置に連結された鋼製反力バーの先端部をクレーンに係合させた状態を示す平面図である。
【図6】全旋回オールケーシング掘削機の概略構造およびこれを支持している傾斜調整可能な斜杭施工用架台を示す縦断側面図である。
【図7】傾斜調整可能な斜杭施工用架台を示す平面図である。
【図8】傾斜調整可能な斜杭施工用架台を示す側面図である。
【図9】他の形態の架台または座板に設けられる位置決め係止部を示す平面を示す図である。
【図10】図9に示す位置決め係止部を有する傾斜調整可能な斜杭施工用架台または座板を使用して、座板上に斜杭施工用架台の下部を係合載置すると共に、斜杭施工用架台上に鋼管杭回転圧入装置を載置した後、斜杭施工用架台を傾斜させて、鋼管杭回転圧入装置を傾斜した状態にした側面図である。
【図11】座板または傾斜調整可能な斜杭施工用架台に取り付けられる係止部を拡大して示す図であって、(a)は平面図であり、(b)は側面図である。
【符号の説明】
1 回転圧入用鋼管杭
2 鋼管杭回転圧入装置
3 地盤
5 傾斜調整可能な斜杭施工用架台
6 クレーン
7 伸縮式脚部
8 支持部
9 鋼管杭挿通孔
10 反力伝達部材
11 斜杭
12 伸縮式脚部
12a アウトリガー
12b ピストン杆
12c 半球状部
12d 半球状受け面
13 ケーシング
13a 上面板
14 螺旋状羽根(または螺旋状翼)
15 係合部
16 斜杭
17 鋼製枕材
18 座板
18a 座板本体
19 球継手
20 架台本体
23 上面板
24 ずれ止め部材
25 鋼管杭回転圧入装置の脚座
26 後付けずれ止め部材
27 スパイラルカラー
28 チャック
29 条体
30 鋼製反力バー
31 横軸
32 車体
33 ベースフレーム
34 角度調整用ジャッキ
35 シリンダ
36 可動ピストン
37 昇降フレーム
38 昇降ジャッキ
39 チャックカラー昇降ジャッキ
40 ベアリング
41 内周テーパ面
42 回転体
43 外歯
44 回転体駆動用油圧モータ
46 駆動歯車
47 鋼管部
48 カラー支持ブロック
48a ボルト
49 テーパ面
50 クサビ機構
51 凹溝
52 杭把持径調整治具
53 チャック本体部
54 前側板
55 チャックブラケット部
56 座板
57 ずれ止め部材本体
58 脚部
59 内向きフランジ
60 ブラケット
61 ピン挿通用透孔
62 ピン
63 中間歯車
[0001]
BACKGROUND OF THE INVENTION
The present invention is a tilt pile adjustable construction for constructing a slant pile composed of a rotary press-fit steel pipe pile that is press-fitted into the ground in order to support structures such as steel towers, roads, bridges or structures such as buildings. TECHNICAL FIELD The present invention relates to a construction base for a construction pile, a slant pile construction apparatus equipped with the base, and a construction method for a slant pile using a rotary press-fit steel pipe pile.
[0002]
[Prior art]
Conventionally, a steel pipe pile rotary press-fitting device such as an all-swivel all-casing excavator is generally used for press-fitting at a right angle to the ground while rotating the steel pipe pile, and Patent Document 1 (Japanese Patent Laid-Open No. 2002-2002). No. 167760 publication), but it is not known to press-fit while rotating the steel pipe pile while tilting the steel pipe pile with respect to the ground.
In particular, with regard to the rotary press-fit steel pipe pile having spiral blades or blades on the peripheral side surface of the steel pipe pile, the rotary press-fit construction is not performed on the ground with the rotary press-fit steel pipe pile inclined.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-167760
[0004]
[Problems to be solved by the invention]
In addition to the problem that it is difficult to set the rotary press-fit steel pipe pile to the steel pipe pile rotary press-fitting device such as an all-swing all-casing excavator in an inclined state, the rotary press-fit steel pipe pile is inclined with respect to the ground. In order to press fit into the ground while holding, there is a problem that a device for supporting the steel pipe pile rotary press fitting device in an inclined state is necessary. In addition, there is a demand for a slant pile construction stand having a simple structure capable of adjusting the inclination to facilitate construction.
[0005]
As a result of various considerations with respect to the above problems, the present inventor easily provided a steel pipe pile rotary press-fitting device by supporting a steel pipe pile rotary press-fitting device through a gantry having a plurality of jacks and adjustable inclination angles. Can be supported in a vertical or inclined state, and the construction is easy, and after the steel pipe pile for rotary press-fit is set in a steel pipe pile rotary press-fitting device such as an all-swing all-casing excavator, the steel pipe pile rotary press-in device is tilted It was found that the steel pipe pile for rotary press-fitting can be easily rotary press-fitted while being tilted with respect to the ground, and the present invention has been completed.
[0006]
The present invention relates to a method for constructing a slant pile that can be press-fitted while rotating a steel pipe pile with respect to the ground (or a horizontal plane), a construction apparatus for the slant pile, and a slant pile construction base that can be slant adjusted. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the tilt-adjustable slant pile construction stand according to claim 1 is used for rotationally press-fitting the rotary press-fit steel pipe pile 1 to the ground 3 while being tilted into the ground 3, and the steel pipe pile rotary press-fit. It is a base for slant pile construction used to support the device 2 so that the tilt can be adjusted, and a plurality of telescopic legs 7 having telescopic jacks 12 are placed on the base body 20 at intervals in the front-rear direction and the left-right direction. And a steel pipe pile insertion hole 9 is provided at the center of the gantry body 20.
[0008]
Moreover, in invention of Claim 2, in the base for diagonal pile construction according to Claim 1, the steel pipe pile rotary press-fitting device 2 is provided on the upper surface of the diagonal pile construction base 5 at intervals in the front-rear direction and the left-right direction. A plurality of engaging portions 15 are provided for engaging with the lower portion.
[0009]
Furthermore, in the inclined pile construction apparatus of claim 3, the steel pipe pile rotary press-fitting device 2 is installed on the inclined pile construction mount 5 capable of adjusting the inclination of claim 1 or 2.
[0010]
Furthermore, in the invention according to claim 4, in the oblique pile construction device according to claim 3, the steel pipe pile rotary press-fitting device 2 is spaced on the upper surface of the oblique pile construction mount 5 in the front-rear direction and the left-right direction. A plurality of engaging portions 15 are provided for engaging with the lower portion.
[0011]
Further, in the invention of claim 5, in the oblique pile construction apparatus of claim 4, the oblique pile of claim 1 or 2 is provided on the seat plate 18 having the steel pipe pile insertion holes 9 arranged on the ground 3. The lower part of the pile construction base 5 is engaged and placed, and the lower part of the steel pipe pile rotary press-fitting device 2 is engaged and placed on the oblique pile construction base 5.
[0012]
Moreover, in the construction method of the diagonal pile of Claim 6, after using the oblique pile construction apparatus in any one of Claims 3-5, the rotary press-fit steel pipe pile 1 is hold | gripped with the steel pipe pile rotary press-fit apparatus 2. The steel pile pile rotary press-fitting device 2 is inclined and the steel pile pile is adjusted by adjusting the expansion and contraction leg portions 7 of the pile pile construction stand 5 to make the slope pile construction stand 5 inclined. The steel pipe pile 1 for rotary press-fitting gripped by the rotary press-fitting device 2 is held in an inclined state, and then the steel pipe pile rotary press-fitting device 2 is driven to press the rotary press-fit steel pipe pile 1 while rotating it to the ground 3 in a tilted state. It is characterized by doing.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.
First, a tilt pile construction mount with adjustable tilt according to an embodiment used in the construction method of the present invention will be described with reference to FIGS. 7 and 8. FIGS. 7 and 8 show the tilt-pile construction base 5 with adjustable inclination according to the present invention. FIG. 7 is a plan view and FIG. 8 is a side view.
[0014]
As shown in FIG. 7, a steel pipe pile insertion through-hole 9 penetrating in the vertical direction is provided in a central portion of a steel gantry main body 20 having a planar rectangular shape or the like and a steel upper surface plate 23 in the main body 20. In addition, in the vicinity of the four corners of the upper surface plate 23 made of steel, a lateral displacement preventing member made of a steel plate is spaced in the front-rear direction and spaced in the left-right direction along the periphery of the upper surface plate 23. 24 is fixed by welding or the like.
[0015]
This lateral displacement prevention member 24 is intended to prevent lateral displacement of the leg seat 25 of the steel pipe pile rotary press-fitting device 2 in an all-swing all-casing excavator or the like, and as shown by a two-dot chain line in FIG. After the leg seat 25 is placed, a post-mounting detent member made of an L-shaped steel plate so that one side (upper portion) is close to the upper surface of the leg seat 25 in order to prevent its upward movement or lateral displacement. The other piece (lower part) of 26 is fixed to the upper surface plate 23 by welding or the like.
[0016]
A plurality of (four in the illustrated example) telescopic jacks 12 such as a hydraulic type are disposed on the front and rear side portions of the gantry body 20 at intervals in the left-right direction, and a casing 13 in each jack 12. The side is fixed to the gantry body 20 with bolts or the like. The position of the telescopic jack 12 is such that the center axis is positioned on the outer side in the front-rear direction and the left-right direction with respect to the positions of the legs of the steel pipe pile rotary press-fitting device 2. Even if the apparatus 2 is placed and the gantry 5 is inclined, the stability is good.
[0017]
Since each of the telescopic jacks 12 has a large mounting interval in the left-right direction of the gantry body 20, a jack with a large jack stroke, such as a hydraulic telescopic jack, can be used when setting the gantry body 20 to an appropriate angle. It is good to use.
[0018]
Further, the tip of the piston rod 12b in the telescopic jack 12 is integrally provided with a hemispherical portion 12c, and a steel leg seat 12e having a substantially hemispherical receiving surface 12d rotates in the hemispherical portion 12c. It is attached as possible.
[0019]
The telescopic jack 12 and the leg seat 12e constitute a telescopic leg portion 7 such as an outrigger 12a on the gantry side that can be tilt-adjusted.
[0020]
In this embodiment, by adjusting the extension amount or the shortening amount of each of the telescopic jacks 12, the inclined pile construction platform 5 can be set to an appropriate inclination angle.
[0021]
A support portion 8 is constituted by the upper surface plate 23 and the displacement preventing member 24, and an engagement portion 15 on the inclined pile construction mount 5 side that can be adjusted in inclination is constituted by a later-installed displacement stopper 26.
[0022]
The tilt angle of the tilt pile construction mount 5 that can be tilt-adjusted depends on the construction conditions, but may be suitably set to 25 degrees or less.
[0023]
Next, although detailed illustration is omitted in FIGS. 1 and 2 (see FIG. 6 for details), the four corners of the steel seat plate main body 18a are also prevented from slipping in the same manner as the structure of the engaging portion 15. A member (not shown, a member corresponding to the reference numeral 24) is fixed in advance, and is provided with an engaging portion 15a configured by fixing a post-displacement preventing member 26, and the center of the seat plate body 18a. A seat plate 18 having a pile insertion hole 18b provided on the ground is installed on the ground 3, and the leg seat 12e of the tilt pile construction base 5 capable of tilt adjustment is a slip-preventing member on the seat plate 18 side. The post-displacement preventing member 26 is fixed to the seat plate 18 and is installed on the seat plate 18 while being engaged with the engaging portion 15a.
[0024]
Next, with reference to FIG. 1 and FIG. 2, the rotary press-fitting steel pipe pile 1 is tilted and is press-fitted into the ground 3 using the tilt-adjustable tilt pile construction mount 5. The construction method and construction apparatus will be described together with a constructional explanation of the all-swivel all-casing excavator 2 as an example.
[0025]
First, the seat plate 18 is arranged on the ground 3 using a crane 6 such as a crawler crane as appropriate. Then, as shown in FIG. 1 (a), the tilt adjustment of the present invention is such that the leg seats 12e on the side of the gantry 5 that can be tilt-adjusted are respectively positioned inside the four-corner detent members on the upper surface of the seat plate 18. In addition to placing the possible oblique pile construction platform 5 and arranging the one side (upper side) of the post-displacement stopper 26 close to the upper surface of the leg seat 12e in the oblique pile construction base 5, the retrofit The other side of the slip prevention member 26 is fixed to the seat plate 18 by welding or the like, and the leg seat 12e is engaged with the engaging portion 15a.
[0026]
In addition, in the engaging part 15a of the said embodiment, when the outrigger 12a in the diagonal pile construction base 5 is expanded-contracted and the diagonal pile construction base 5 is inclined, ie, the form in which the casing 13 side in the telescopic jack 12 is fixed. Therefore, in the state in which the gantry 5 is inclined with respect to one hemispherical portion 12c in the left-right direction, when the other telescopic jack 12 is extended, the other hemispherical portion 12c is slightly decentered outward. In order to cope with this, it is advisable to provide a slight gap between the slip-preventing member and the leg seat 12e, and between the other side of the post-mounting slip-preventing member 26 and the leg seat 12e. The retrofitting stopper member 26 may be fixed to the seat plate 18 after the inclination of the gantry 5 is adjusted.
[0027]
Thus, when the outrigger 12a in the slant pile construction base 5 is extended and contracted to tilt the slant pile construction base 5, the tip of the outrigger 12a is slightly displaced in the left-right direction. A slight margin is provided in the lateral direction between the portion 15a and the leg seat 12e in the oblique pile construction base 5.
[0028]
In this way, the slant pile construction base 5 that can be tilt-adjusted is installed on the seat plate 18 in a state where each outrigger 12a is not telescopically operated.
[0029]
Next, as shown in FIG. 7, the entire turn is performed so that the leg seats 25 are positioned inside the anti-slip members 24 near the four corners on the upper surface of the tiltable pile mounting base 5 that is adjustable in inclination in the horizontal state. In order to mount each leg seat 25 of the steel pipe pile rotary press-fitting device 2 composed of an all-casing excavator and to prevent the leg seat 25 of the steel pipe pile rotary press-fitting device 2 from slipping, a slip-off preventing member 26 attached as described above is used. Is fixed to the upper surface plate 23 of the tilt pile construction base 5 capable of tilt adjustment, and the steel pipe pile rotary press-fitting device 2 and the tilt pile construction base 5 capable of tilt adjustment are engaged.
[0030]
Next, as shown in FIG. 1 (b), the steel pipe pile 1 for rotary press fitting is suspended and supported by the crane 6 so as to be mounted on the steel pipe pile rotary press fitting apparatus 2 composed of the all-slewing all casing excavator in this state. As shown in FIG. 1 (c) (and FIG. 1), the lower part of the rotary press-fit steel pipe pile 1 having a spiral wing or a spiral blade 14 or the like at the lower end is provided with a spiral collar in the steel pipe pile rotary press-in device 2. 27, the steel pipe pile 1 for rotary press-fitting is lowered while being rotated, and after passing through the spiral blade portion 14 of the steel pipe pile 1, the steel pipe pile 1 is gripped by the chuck 28 in the steel pipe pile rotary press-fitting device 2. Hold. The rotary press-fit steel pipe pile 1 is supported by a locking hook in the crane 6 via a strip 29.
[0031]
Next, as shown in FIG. 2 (d), each of the telescopic jacks 12 in the slant pile construction base 5 that can be tilted is telescopically driven so that the slant pile construction base 5 is inclined at a predetermined angle. . Thereby, the steel pipe pile rotation press-fitting device 2 and the steel pipe pile 1 for rotary press-fitting are arranged in a state inclined with respect to the ground 3 or the horizontal plane.
[0032]
Next, one end of the steel reaction force bar 30 is connected to one end of the steel pipe pile rotary press-fitting device 2 by a horizontal shaft 31, and the tip end of the steel reaction force bar 30 is engaged with the vehicle body 32 of the crane 6. Thus, the crane 6 receives a rotational reaction force when the steel pipe pile 1 for rotary press-fitting is rotated by the steel pipe pile press-fitting device 2.
[0033]
In addition, when the base end side of the steel reaction force bar 30 is at a lower level than the ground surface, the ground 3 on the lower surface of the steel reaction force bar 30 is dug down as appropriate. Moreover, you may make it connect the front-end | tip part of the steel reaction force bar 30 to the bracket 32 etc. which are fixed to the vehicle body 32 of the crane 6 by a horizontal axis (illustration was abbreviate | omitted).
[0034]
In this state, as shown in FIG. 2 (e), the steel pipe pile rotary press-fitting device 2 is driven, and the ground pipe 3 is subjected to the steel pipe pile rotary press-fitting device 2 with an upper load applied to the rotary press-fit steel pipe pile 1. Rotate and press fit. The upper load needs to be applied in order for the spiral blade 14 to penetrate the ground 3. Moreover, the inclination angle of the steel pipe pile rotary press-fitting device 2 is adjusted by applying the inclination angle adjustment jack 34 in the steel pipe pile rotary press-fitting device 2 to finely correct or finely adjust the tilt angle of the steel pipe pile 1 for rotary press-fitting. can do.
[0035]
Since the propulsion force by the blade does not occur until the spiral blade 14 enters the ground surface, the upper load requires the upper load of the weight of the steel pipe pile rotary press-fitting device 2 at the beginning of the penetration. Later, depending on the N value of the ground, it is also possible to carry out by applying a constant upper load or a further load of only the steel pipe pile rotary press-fitting device 2 such as an all-swing all-casing excavator.
[0036]
When the rotary press-fitting steel pipe pile 1 is tilted, the jack 34 in the steel pipe pile rotary press-fitting device 2 is stretched and adjusted to adjust the inclined penetration angle of the rotary press-fit steel pipe pile 1. May be.
[0037]
As shown in FIG. 2 (f), the steel pipe pile for rotary press-fitting 1 is rotationally press-fitted to a predetermined depth as shown in FIG. To complete the press-fitting. In addition, although illustration is abbreviate | omitted, a new steel pipe may be fixed to the upper end part of the rotary press-fit steel pipe pile 1 by welding etc., and the rotary press-fit steel pipe pile which reaches a predetermined depth may be press-fit.
[0038]
As shown in FIG. 2 (g), when the rotary press-fit steel pipe pile 1 that is press-fitted into the ground 3 is pulled out, the rotary press-fit steel pipe pile 1 is rotated reversely by the steel pipe pile rotary press-in device 2. When the jack 38 is extended and a pulling force is applied, the rotary press-fit steel pipe pile 1 can be pulled out easily.
[0039]
Next, the structure of an example of the steel pipe pile rotary press-fitting device (full turning all-casing excavator) 2 will be briefly described with reference to FIG. A cylinder 35 of a hydraulic angle adjusting jack 34 having a seat 25 is fixed, and a leg seat 25 is attached to a tip end portion of a movable piston 36 of the jack 34 via a ball joint 19.
[0040]
A plurality of (four) lifting jacks 38 for raising and lowering the lifting frame 37 are erected on the base frame 33, and the rotary press-fit steel pipe pile 1 is press-fitted by shortening the lifting jack 38. It is configured. A chuck collar lifting jack 39 is provided on the lifting frame 37. Further, a bearing 40 is provided inside the lower part of the elevating frame 37, and a rotating body 42 in which an inner peripheral tapered surface 41 whose diameter is enlarged upward is formed via the bearing 40. An annular external tooth 43 is provided on the outer periphery of the rotating body 42, and the external tooth 43 meshes with a driving gear 46 of a rotating body driving hydraulic motor 44 fixed to the lifting frame 37 via an intermediate gear 63. is doing.
[0041]
A chuck collar 27 that grips and rotates the steel pipe portion 47 of the rotary press-fit steel pipe pile 1 is provided inside the rotating body 42. A collar support block 48 is fixed to the chuck collar 27 with bolts 48a, and a tapered surface 49 whose upper diameter is enlarged is formed on the outer surface of the collar support block 48 to provide a wedge function thereto. The wedge mechanism 50 is configured by making the tapered surface 49 slidably contact with the inner circumferential tapered surface 41 whose diameter of the upper part of the rotating body 42 is increased.
[0042]
As shown in FIG. 6, the chuck collar 27 is formed with concave grooves 51 having the same pitch as the spiral blades 14 of the rotary press-fit steel pipe pile 1. Then, the rotary press-fit steel pipe pile 1 is suspended from above the steel pipe pile rotary press-fitting device 2, the spiral blade 14 is moved along the concave groove 51, and the rotary press-fit steel pipe pile 1 is screwed in while rotating. The portion of the chuck collar 27 is allowed to pass, and thereafter, the pile grip diameter adjusting jig 52 at the tip of the chuck collar 27 and a high friction material provided thereon are pressed and gripped to be rotationally press-fitted.
[0043]
A plurality of (for example, eight) chuck collars 27 are arranged at equal intervals in the circumferential direction. The chuck collar 27 is configured by fixing a chuck body portion 53 having a box-shaped cross section, which has a box-shaped cross section composed of upper and lower plates and both side plates, to a chuck body portion 53 having a vertical box-shaped cross section and a front plate 54 of the chuck body portion 53. The The chuck bracket portion 55 is provided in multiple stages vertically with a predetermined gap while shifting the position in the vertical direction for each chuck collar 27, so that the entire eight chuck collars 27 provided at equal intervals in the circumferential direction are provided. As a result, the grooves 51 having the same pitch as the spiral blades 14 of the rotary press-fit steel pipe pile 1 are formed.
[0044]
As described above, even if the steel pile pile rotary press-fitting device 2 is tilted by inclining the diagonal pile construction platform 5, the engagement state of the steel pipe pile rotary press-in device 2 and the diagonal pile construction stand 5 capable of adjusting the inclination is maintained. Then, the rotational reaction force of the steel pipe pile rotary press-fitting device 2 can be transmitted to the crane 6 through the reaction force transmission member 10 including the steel reaction force bar 30.
[0045]
Moreover, by adjusting the amount of expansion / contraction of the angle adjusting jacks 34 arranged at the four corners of the steel pipe pile rotary press-fitting device 2, the tilt angle of the steel pipe pile rotary press-fitting device 2 can be finely adjusted as appropriate. The leg seat 25 is attached to the tip of the movable piston 36 of the jack 34 through a ball joint 19 having a substantially spherical portion and a receiving seat and a hemispherical receiving portion, so that the inclination can be adjusted. The leg seat 25 can be placed in a stable state on the slant pile construction base 5.
[0046]
As described above, after the first rotary press-fit steel pipe pile 1 is constructed, a lower portion of a new steel pipe is fixed to the upper end of the rotary press-fit steel pipe pile 1 by welding or the like, thereby obtaining a predetermined length. You may make it construct the slanting pile 16 which consists of the steel pipe pile 1 for rotary press injection.
[0047]
After rotary press-fitting the steel pipe pile 1 for rotary press-in to a predetermined position, the steel pipe pile rotary press-in device 2 and the tilt-pile adjustable gantry 5 are moved to new construction locations, respectively. By the same procedure, the rotary press-fit steel pipe pile 1 is rotary press-fitted.
[0048]
In the case of the above-described embodiment, the tilt pile construction platform 5 that can be adjusted in inclination is used, and the lower leg seat 25 of the steel pipe pile rotary press-fitting device 2 and the inclination pile installation platform 5 that can be adjusted in inclination are engaged in advance. The lower leg portion 25 of the steel pipe pile rotary press-fitting device 2 is locked by the fixed stopper 24 and the retrofitting stop member 26 attached to the tilt pile construction platform 5 capable of adjusting the inclination. Although the horizontal movement and the upward movement are prevented, the steel pipe pile rotation can be performed by attaching and detaching the pin 62 as in the tilt adjustable pile mounting base 5 of the next embodiment shown in FIGS. Since the leg part of the press-fitting device 2 can be detachably engaged with the engaging part 15, this embodiment will be described.
[0049]
FIGS. 9-11 shows the deformation | transformation form of the inclination pile construction mount 5 in which inclination adjustment is possible, and the inclination pile construction apparatus using the same, Comprising: In the inclination pile construction stand 5 of this embodiment, it is a substantially rectangular parallelepiped. In the vicinity of the four corners of the gantry main body 20, a plurality of detent member main bodies 57 having a seat plate 56 and detachable pins 62 are provided in the same direction to constitute the engaging portion 15. Since other configurations are the same as those of the above-described embodiment, the same reference numerals are given to the same parts, and different parts will be mainly described.
[0050]
A steel disk for forming engagement portions 15 in the vicinity of the four corners of the upper surface plate 23 of the gantry body 20 is provided with a steel pipe pile insertion through hole 9 at the center of the gantry body 20. A shaped seat plate 56 is fixed by welding or the like.
[0051]
On the upper surface of the seat plate 56, a leg portion 58 of a slip prevention member main body 57 having a substantially U-shaped plane having a semicircular portion and having a substantially L-shaped cross section is fixed by welding, and is mounted on the upper portion of the leg portion 58. An inward flange 59 is provided integrally.
[0052]
The diameter of the semicircular portion in the slip prevention member main body 57 is set to be slightly larger than the diameter of the leg portion 25 in the steel pipe pile rotary press-fitting device 2, and the upper surface of each distal end portion on the release side of the U-shaped portion is Steel brackets 60 are fixed by welding so as to face each other, pin insertion holes 61 are provided in each bracket 60, and detachable pins 62 are provided across the pin insertion holes 61 of each bracket 60. Thus, an engaging portion 15 that can be detachably locked is configured.
[0053]
When the leg seat 25 in the steel pipe pile rotary press-fitting device 2 is locked to the pedestal 5, the leg seat 25 is placed with the pin 62 removed (note that the pedestal 5 or the steel pipe pile rotary press-fitting device 2 After the side is appropriately moved laterally and engaged), the pin 62 is installed. The pin 62, the leg portion 58, and the upper flange 59 are designed to prevent the lateral movement and the upward movement of the leg seat 25 in the steel pipe pile rotary press-fitting device 2.
[0054]
Further, the leg seat 12e of the tilt pile construction mount 5 capable of tilt adjustment is detachably engaged with an engaging portion 15a in a seat plate 18 made of a rectangular steel plate. The engaging portion 15a of this embodiment is a detachable engaging portion, and has the same configuration as the detachable and engageable engaging portion 15 on the side of the oblique pile construction base 5 that can be tilt-adjusted.
[0055]
That is, a seat plate 56 similar to the above is fixed to the upper surface in the vicinity of the four corners of the seat plate 18 by welding, and the upper surface of the seat plate 56 has a substantially U-shaped plane having a semicircular portion and has a cross section. A leg portion 58 of the substantially L-shaped displacement preventing member main body 57 is fixed by welding, and an inward flange 59 is integrally provided on the upper portion of the leg portion 58.
[0056]
The diameter of the semicircular portion in the slip prevention member main body 57 is set to be slightly larger than the diameter of the leg seat 12e in the slant pile construction base 5 that can be tilt-adjusted, and each distal end portion on the release side of the U-shaped portion A steel bracket 60 is fixed to the upper surface by welding so as to face each other, and a pin insertion through hole 61 is provided in each bracket 60, and is detachable across the pin insertion through hole 61 of each bracket 60. The pin 62 is provided, and the engaging part 15a which can be detachably latched is comprised.
[0057]
In order to lock the leg seat 12e in the slant pile construction base 5 that can be tilt-adjusted to the seat plate 18, the leg seat 12e is placed with the pin 62 removed (the base 5 or the seat 5). After the plate 18 side is appropriately moved laterally and engaged), a pin 62 is installed. The pin 62, the leg portion 58, and the upper flange 59 allow engagement and upward movement of the leg seat 12e while allowing the leg seat 12e to move slightly in the lateral direction while allowing the leg seat 12e to move slightly in the lateral direction. To prevent slippage.
[0058]
As described in the above embodiment, since the casing 13 of the telescopic jack 12 is also fixed to the gantry body 20 in this embodiment, the telescopic jack on one side in the left-right direction is fixed to the gantry body 20. When the telescopic jack 12 on the other side in the left-right direction is extended centering on the lower part on the 12 side, the tip of the telescopic jack 12 on the other side is slightly eccentric to the outside (the other side in the left-right direction). The eccentric amount is allowed.
[0059]
When the steel pipe pile rotary press-fitting device 2 is installed using the gantry 5, as shown in FIG. 10, in the left and right displacement preventing members of the steel seat plate 18 placed on the ground 3. The diagonal pile construction base 5 is placed on the seat plate 18 so as to be positioned, and the pin seat 61 is detached from the leg seat 12e of the diagonal pile construction base 5 on the seat plate 18 side. Placed and placed inside, mounted with pins 61, engaged with the diagonal pile construction base 5 and the seat plate 18, and also attached the leg seat 25 of the steel pipe pile rotary press-fitting device 2 to the diagonal pile construction base It arrange | positions and mounts in the 5 side shift prevention member main body 57, the pin 61 is mounted | worn, and the engagement of the slope pile construction mount 5 and the steel pipe pile rotary press-in apparatus 2 is aimed at. (See Figure 10)
[0060]
Next, in the same manner as in the above embodiment, the steel pipe pile for rotary press-in 1 is built in the steel pipe pile rotary press-in device 2 composed of an all-swivel all-casing excavator by the procedure shown in FIGS. 2, while the inclined pile construction platform 5 is inclined at a predetermined inclination angle, the steel pipe pile rotary press-fitting device 2 is driven, and the rotary press-fit steel pipe pile 1 is rotated to the ground 3 while being inclined. Press fit.
[0061]
In the case of the above-described embodiment, the slant pile construction base 5 that can be tilt-adjusted is placed on the seat plate 18 on the ground 3, but the slant pile construction that can be slant-adjusted on a steel plate support base. The platform 5 may be placed. 9 may be adopted in place of the displacement preventing means shown in FIGS. 4 and 7, and the inclination adjustment may be performed instead of the displacement preventing means in the form shown in FIG. The slip-preventing means employed in the possible stake pile construction stand 5 may be employed or may be combined.
[0062]
In the case of the said embodiment, although the steel pipe pile rotary press-in apparatus 2 which consists of a wedge-type all-swivel all casing excavator was shown, as the steel pipe pile rotary press-in apparatus 2, the steel pipe pile 1 for rotary press fitting is hold | gripped in a band type. A steel pipe pile rotary press-fitting device may be used, and other appropriate steel pipe pile rotary press-fitting devices may be used. Moreover, you may make it use the steel pipe pile for rotary press-fit similarly about the steel pipe pile 1 for rotary press-fit.
[0063]
In the above embodiment, the case where the inclined pile in the inclined state is rotationally press-fitted into the ground has been described, but the pile is applied to the ground having a large step or unevenness that cannot be handled by the flat plate-shaped seat plate. Even in the case of construction in a vertical state or an inclined state, the inclined pile construction mount of the present invention can be used. In such a case, a seat plate corresponding to the lower end of each leg may be installed.
[0064]
【The invention's effect】
According to the oblique pile construction platform of claim 1 of the present invention, the platform body is provided with a plurality of telescopic legs having telescopic jacks at intervals in the front-rear direction and the left-right direction, and the center of the platform body Since the steel pipe pile insertion hole is provided in the part, it can be easily used as an inexpensive pile pile support, and the steel pipe pile rotary press-fit device is supported so that the inclination can be adjusted. Can be made easier.
[0065]
Further, as in claim 2, a plurality of engaging portions for engaging with the lower portion of the steel pipe pile rotary press-fitting device are provided on the upper surface of the oblique pile construction base with a space in the front-rear direction and the left-right direction. In this case, the lower part of the steel pipe pile rotary press-fitting device can be easily engaged and installed on the oblique pile construction stand, and the steel pipe pile rotary press-fitting device can be supported in a stable state.
[0066]
Further, according to the oblique pile construction apparatus of claim 3, the tilt adjustable pile base having a plurality of telescopic legs having telescopic jacks and having a steel pipe pile insertion hole in the central portion. Since the steel pipe pile rotary press-fitting device is installed on the upper side, it is possible to provide a slant pile construction device having a simple configuration combining the pile pile construction stand and the steel pipe pile rotary press-fitting device. In particular, the use of a tilt pile construction platform that can be adjusted for inclination makes it easy to install the steel pipe pile rotary press-fit device with the top surface of the tilt pile construction stand placed in a horizontal state. After the installation, the steel pile pile press-fitting device can be easily inclined by simply setting the inclined pile construction platform to the inclined state.
[0067]
Further, as in claim 4, a plurality of engaging portions 15 for engaging with the lower portion of the steel pipe pile rotary press-fitting device 2 on the upper surface of the oblique pile construction base 5 at intervals in the front-rear direction and the left-right direction. Is provided, the lower portion of the steel pipe pile rotary press-fitting device can be easily engaged and installed on the oblique pile construction stand, and the steel pipe pile rotary press-fitting device can be supported in a stable state.
[0068]
Further, according to claim 5, the engagement between the lower part of the oblique pile construction base and the seat plate on the ground and the engagement between the oblique pile construction base and the lower part of the steel pipe pile rotary press-fitting device are easy. Engagement and integration from the ground base plate to the steel pipe pile rotary press-in device is easy, and the steel pipe pile for rotary press supported by such an integrated device has good stability and relatively high accuracy. Steel pipe piles can be press-fitted into the ground or pulled out.
[0069]
Further, according to the invention of claim 6, since the steel pipe pile for rotary press-in, which has been difficult in the past, can be easily rotary press-fitted into the ground in an obliquely inclined state, the inclined pile made of the steel pipe pile for rotary press-in is provided. Easy to install. In addition, since a steel pipe pile rotary press-fitting device such as a full swivel all-casing excavator is used, the advantage of this device is that it can be constructed with low noise and low vibration.
[0070]
In particular, in the present invention, since a tiltable pile mounting base having a plurality of telescopic legs having telescopic jacks and having a steel pipe pile insertion hole in the center is used. The steel pile pile press-fit device can be easily installed on the slant pile construction base with the top surface of the slant pile construction base being in a horizontal state, and the slant pile construction base can be easily inclined, The steel pipe pile rotary press-fitting device can be easily supported in the vertical state or inclined state via the inclined pile construction stand, and therefore the rotary press-fit steel pipe pile can be rotationally press-fitted in an easily inclined state with respect to the ground. Thus, the construction can be simplified, and as a result, the construction period and construction cost of the pile construction can be reduced.
[Brief description of the drawings]
FIGS. 1A to 1C are schematic side views showing a construction procedure of a rotary press-fit steel pipe pile by carrying out the oblique pile construction method of the present invention.
2 (d) to (f) are schematic side views showing a continuation procedure of FIG. 1, and (h) is a schematic side view in the case of pulling out a steel pipe pile for rotary press-fitting.
FIG. 3 is a side view showing a state in which a steel pipe pile rotary press-fitting device composed of an all-swing all-casing excavator is installed in an inclined state and a reaction force bar is provided on a tilt pile construction base that can be adjusted in inclination.
4 is an enlarged side view showing a part of FIG.
FIG. 5 is a plan view showing a state in which a tip portion of a steel reaction force bar connected to a steel pipe pile rotary press-fitting device is engaged with a crane.
FIG. 6 is a vertical sectional side view showing a schematic structure of an all-swivel all-casing excavator and an inclined adjustable pile support that supports the excavator.
FIG. 7 is a plan view showing a slant pile construction platform that can be tilt-adjusted.
FIG. 8 is a side view showing a tilt pile construction mount that can be tilt-adjusted.
FIG. 9 is a plan view showing a positioning locking portion provided on a gantry or a seat plate of another form.
FIG. 10 is a perspective view showing a tilt pile construction platform or a seat plate having a positioning locking portion shown in FIG. 9, and a lower portion of the slope pile construction platform is engaged and placed on the seat plate; It is the side view which made the steel pipe pile rotation press-fitting device in the state which inclined the steel pile pile rotation press-fitting device after mounting the steel pipe pile rotation press-fitting device on the slant pile construction stand.
FIGS. 11A and 11B are enlarged views showing a locking portion attached to a seat plate or a tilt pile construction base that can be tilt-adjusted, wherein FIG. 11A is a plan view and FIG. 11B is a side view;
[Explanation of symbols]
1 Steel pipe pile for rotary press-fitting
2 Steel pipe pile rotary press-fitting device
3 ground
5 Cantilever pile support for tilt adjustment
6 Crane
7 Telescopic legs
8 Supporting part
9 Steel pipe pile insertion hole
10 Reaction force transmission member
11 Shaft pile
12 Telescopic legs
12a Outrigger
12b Piston rod
12c Hemispherical part
12d hemispherical bearing surface
13 Casing
13a Top plate
14 Spiral blades (or spiral wings)
15 Engagement part
16 Shaft pile
17 Steel pillows
18 Seat plate
18a Seat plate body
19 Ball joint
20 Base body
23 Top plate
24 Non-slip member
25 Legs of steel pipe pile rotary press-fitting device
26 Retrofit member
27 Spiral color
28 Chuck
29 strips
30 Steel reaction bar
31 Horizontal axis
32 body
33 Base frame
34 Jack for angle adjustment
35 cylinders
36 movable piston
37 Lifting frame
38 Lifting jack
39 Chuck collar lifting jack
40 Bearing
41 Inner peripheral taper surface
42 Rotating body
43 external teeth
44 Hydraulic motor for rotating body
46 Drive gear
47 Steel pipe
48 color support block
48a bolt
49 Tapered surface
50 Wedge mechanism
51 groove
52 Pile gripping diameter adjustment jig
53 Chuck body
54 Front plate
55 Chuck bracket
56 Seat plate
57 Detachment member body
58 legs
59 Inward flange
60 Bracket
61 Pin insertion hole
62 pins
63 Intermediate gear

Claims (6)

回転圧入鋼管杭(1)を地盤(3)に傾斜した状態で回転圧入するために使用され、かつ鋼管杭回転圧入装置(2)を傾斜調整可能に支持するために使用される斜杭施工用架台であって、架台本体(20)に、伸縮式ジャッキ(12)を有する複数の伸縮式脚部(7)を前後方向および左右方向に間隔をおいて備えていると共に、架台本体(20)の中央部に鋼管杭挿通孔(9)を備えていることを特徴とする傾斜調整可能な斜杭施工用架台。  For inclined pile construction used for rotating press-fitting steel pipe pile (1) into the ground (3) in a state where it is inclined and supported to support the steel pipe pile rotary press-fitting device (2) so that the inclination can be adjusted. The gantry body (20) is provided with a plurality of telescopic legs (7) having telescopic jacks (12) at intervals in the front-rear direction and the left-right direction, and the gantry body (20). A tilt pile adjustable mounting base characterized in that a steel pipe pile insertion hole (9) is provided at the center of the pile. 斜杭施工用架台5の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置2の下部に係合させるための複数の係合部15が設けられていることを特徴とする請求項1に記載の斜杭施工用架台。A plurality of engaging portions 15 for engaging with the lower portion of the steel pipe pile rotary press-fitting device 2 are provided on the upper surface of the slant pile construction base 5 at intervals in the front-rear direction and the left-right direction. The inclined pile construction stand according to claim 1 to be performed. 請求項1または2の傾斜調整可能な斜杭施工用架台(5)上に鋼管杭回転圧入装置(2)が設置されていることを特徴とする斜杭施工装置。  3. A slant pile construction device, wherein a steel pipe pile rotary press-fitting device (2) is installed on the slant pile construction base (5) capable of tilt adjustment according to claim 1 or 2. 斜杭施工用架台(5)の上面に、前後方向および左右方向に間隔をおいて、鋼管杭回転圧入装置(2)の下部に係合させるための複数の係合部(15)が設けられていることを特徴とする請求項3に記載の斜杭施工装置。  A plurality of engaging portions (15) for engaging with the lower portion of the steel pipe pile rotary press-fitting device (2) are provided on the upper surface of the inclined pile construction base (5) at intervals in the front-rear direction and the left-right direction. The slant pile construction device according to claim 3 characterized by things. 地盤(3)上に配置された鋼管杭挿通孔(9)を有する座板(18)上に、請求項1または2の斜杭施工用架台(5)の下部が係合載置され、かつ斜杭施工用架台(5)上に鋼管杭回転圧入装置(2)の下部が係合載置されていることを特徴とする請求項4に記載の斜杭施工装置。  On the base plate (18) having the steel pipe pile insertion hole (9) arranged on the ground (3), the lower part of the inclined pile construction base (5) according to claim 1 or 2 is engaged and mounted, and The inclined pile construction device according to claim 4, wherein a lower portion of the steel pipe pile rotary press-fitting device (2) is engaged and placed on the inclined pile construction stand (5). 請求項3〜5のいずれかに記載の斜杭施工装置を使用して、回転圧入鋼管杭(1)を鋼管杭回転圧入装置(2)により把持した後、斜杭施工用架台(5)における各伸縮式脚部(7)を伸縮調整して、斜杭施工用架台(5)を傾斜状態とすることにより、鋼管杭回転圧入装置(2)を傾斜した状態にすると共に、鋼管杭回転圧入装置(2)に把持された回転圧入用鋼管杭(1)を傾斜した状態に保持し、次いで鋼管杭回転圧入装置(2)を駆動して回転圧入鋼管杭(1)を傾斜した状態で地盤(3)に回転させながら圧入することを特徴とする斜杭の施工方法。  Using the inclined pile construction device according to any one of claims 3 to 5, after gripping the rotary press-fit steel pipe pile (1) with the steel pipe pile rotary press-fit device (2), the oblique pile construction stand (5) Each telescopic leg (7) is adjusted to expand and contract, and the inclined pile construction base (5) is tilted, so that the steel pipe pile rotary press-in device (2) is tilted and the steel pipe pile rotary press-fitted Hold the steel pipe pile (1) for rotary press-fit gripped by the device (2) in an inclined state, and then drive the steel pipe pile rotary press-in device (2) to incline the rotary press-fit steel pipe pile (1). (3) A method for constructing a slant pile characterized by press-fitting while rotating.
JP2003046848A 2003-02-25 2003-02-25 Inclined pile construction platform with adjustable tilt, construction equipment for oblique pile equipped with the platform, and construction method of oblique pile using rotary press-fit steel pipe pile Expired - Fee Related JP4084677B2 (en)

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