JP2004044209A - Embedment method for pipe pile and embedment apparatus for the same - Google Patents

Embedment method for pipe pile and embedment apparatus for the same Download PDF

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Publication number
JP2004044209A
JP2004044209A JP2002202747A JP2002202747A JP2004044209A JP 2004044209 A JP2004044209 A JP 2004044209A JP 2002202747 A JP2002202747 A JP 2002202747A JP 2002202747 A JP2002202747 A JP 2002202747A JP 2004044209 A JP2004044209 A JP 2004044209A
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Japan
Prior art keywords
pipe pile
drive shaft
hole
pile
shaft
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JP2002202747A
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Japanese (ja)
Inventor
Takashi Koyama
小山 隆資
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Sankei Co Ltd
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Sankei Co Ltd
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Priority to JP2002202747A priority Critical patent/JP2004044209A/en
Publication of JP2004044209A publication Critical patent/JP2004044209A/en
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  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To directly give a rotary drive force near the lower end on which the maximal excavation resistance is caused by a drive shaft inserted in a pipe pile hole originally possessed by the pile to remove the cause of twist between the upper and the lower ends of a conventional pipe pile and soundly embed the pile. <P>SOLUTION: In the embedment method of a pipe pile 6, the pile 6 is embedded in a vertical hole 28 while self-digging the hole 28 into the ground 25 by rotation of the pile 6. A drive shaft 17 is inserted into the pile hole 15 from the upper end of the pile 6. A motor 26 is installed in the vicinity of the upper end of the shaft 17. The shaft 17 is rotated by the rotary force of the motor 26. The vicinity of the lower end of the shaft 17 is detachably engaged with the pile 6 in the near position of the lower end of the hole 15. The rotary force of the shaft 17 imparts near to the lower end of the pile 6 to self-dig the vertical hole 28. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は管杭基礎を形成するコンクリート管杭又は鋼管杭から成る管杭の埋設工法と同埋設装置に関する。
【0002】
【従来の技術】
交通標識、案内板、街路灯等の支柱を立設する場合、或いは建造物等を構築する際の基礎工法として、掘削機によって地盤に縦穴を掘削し、該縦穴内にコンクリート管杭又は鋼管杭を挿入し、該管杭孔内に中込砕石や中込モルタルを投入して管杭孔内に支柱を立て込んだり建造物を構築する管杭埋設工法が広く実施されている。
【0003】
他方特公平2−62648号等に示すように、鋼管杭の下端に掘削刃を設けて置き、該鋼管杭を地盤に立設して回転させることにより上記掘削刃で地盤に縦穴を自己掘削しつつ埋設し、地盤改良を図る工法が知られており、この自己掘削杭を用いて地盤中に埋設した管杭孔内に中込砕石や中込モルタルを投入して支柱を立設したり、建造物を構築する基礎工法が実施可能である。
【0004】
【発明が解決しようとする課題】
然しながら上記事前に縦穴を掘削し、これにコンクリート管杭又は鋼管杭を挿入する基礎工法は、縦穴掘削に際し多量の残土が排出される欠点を有し、更には事前に掘削した縦穴内に土砂が崩れ落ちて管杭の挿入に支障を来し、軟弱地盤には実施し難い問題を有している。加えて縦穴と管杭間に遊びを生じ、基礎耐力を減殺する問題を有している。又工事時間を多く要しコストが高くつく問題を有している。
【0005】
他方鋼管杭の下端に掘削刃を溶接等にて取り付けて置き、この掘削刃にて縦穴を自己掘削しつつ埋設を図る基礎工法においては、図1に示すように、モーター1の駆動軸2と一体のキャップ3を鋼管杭4の上端に被嵌してキー結合5し、該キャップ3を介してモーター1の回転力を鋼管杭4の上端に与えて同鋼管杭4を回転せしめ、上記掘削刃で縦穴を自己掘削する方法を採っているが、この方法では鋼管杭4の上端周面に強力な回転力が加わるのに対し、鋼管杭4下端にはこれに抗する大きな掘削抵抗が働き、このため鋼管杭4上端と下端間に捻れが発生し、鋼管杭4の変形、亀裂等の損傷、縦穴の芯ずれ等を招来する問題を有している。
【0006】
【課題を解決するための手段】
本発明は上記問題を適切に解決する、コンクリート管杭又は鋼管杭から成る管杭の埋設工法と同埋設装置を提供するものである。
【0007】
本発明に係る管杭の埋設工法は上記管杭が有する管杭孔を利用し、該管杭孔内に上端からドライブシャフトを挿入し、該ドライブシャフトの上端付近にモーター等による回転力を与えて同シャフトを管杭孔内で回転せしめるようにする。
【0008】
そして該ドライブシャフトの下端付近を管杭孔の下端付近において管杭と係脱可に係合し、該係合を介して上記ドライブシャフトの回転力を管杭の下端付近に付与し、上記縦穴を自己掘削する工法を採る。
【0009】
上記工法に使用される埋設装置は上記管杭の上端から管杭孔内に挿入されるドライブシャフトを備え、該ドライブシャフトの下端付近に回転伝達継手を設け、他方上記管杭孔の下端付近に上記管杭と一体なる回転伝達継手を設け、該両回転伝達継手を相互に係合し、該回転伝達継手による係合を介してドライブシャフトの回転力を管杭の下端付近に付与し、上記縦穴を自己掘削する構成を有する。
【0010】
上記管杭の埋設工法と同埋設装置においては、管杭が元々所有する管杭孔に挿入されたドライブシャフトにより、掘削抵抗が最も加わる管杭下端付近に回転駆動力が直接的に与えられ、前記管杭の上端と下端間における捻れの原因を払拭し、管杭を健全に埋設することができる。
【0011】
【発明の実施の形態】
以下本発明の実施の形態を図2乃至図8に基づき説明する。
【0012】
前記の通り本発明は管杭基礎を形成する管杭の埋設工法と同埋設装置に係り、コンクリート管杭と鋼管杭等を対象とする。
【0013】
図7,図8は代表例としてコンクリート管から成る管杭6を示しており、図2,図3,図7に示す通り、該管杭6の下端(先端)に掘削刃7を取り付ける。該掘削刃7は尖鋭な先端を有する角錐体から成る中空構造の穂先部8を有し、角錐体の各角縁にて掘削縁12を形成している。
【0014】
上記穂先部8は図示の通り、基部から先端に向け延在する三角形の尾根部31を周方向に複数並列して有し、各尾根部31間に三角形の谷部32を形成しており、尾根部31の稜線(上記角縁に相当)にて掘削縁12を形成している。
【0015】
上記三角形の谷部32は穂先部8の回転時に掘削土を尾根部31の斜面(谷部32の斜面)に沿い外周方向へ押し出す機能を持ち、管杭6の推進を円滑にする。
【0016】
更に上記穂先部8の基端にキャップ部9を一体且つ同心に連設し、穂先部8の外周面からキャップ部9の外周面に亘り螺旋フィン10を一体に設け、該螺旋フィン10の始端(穂先部8の先端側端部)にすくい刃11を一体に設けた構造を有している。
【0017】
更に上記キャップ部9の底板13の中心部、即ち穂先部8の基端開口面を閉鎖するように一体に取り付けた底板13の中心部に軸線上へ立ち上がる角筒体14を一体に取り付け、上記掘削刃7をキャップ部9を以って管杭6の下端外周面に一体に嵌装し、上記角筒体14を管杭孔15の軸線上において同孔15の下端内に立ち上げる。この角筒体14は回転伝達継手を構成している。
【0018】
上記角筒体14の筒孔は貫通孔であり、上端は管杭6の管杭孔15内に開口し、下端は底板13を貫いて穂先部8の空洞内に開口している。
【0019】
上記掘削刃7は底板13の周縁部を管杭6の下端面に当接し、同所においてボルト16止めし管杭6と一体にする。又管杭6が鋼管杭である場合には、上記掘削刃7を管杭6の下端に溶接等にて一体に取り付けることができる。
【0020】
他方図4,図5に示すドライブシャフト17は角柱体にて形成し、該角柱体の上端側と下端側に等径の円板18,19を一体に取り付け、該上部円板18から上方へ角柱体の上端部を突出し、該突出せる上端柱体部分20にてモーター継手を形成すると共に、下部円板19から下方へ角柱体の下端部を突出し、該突出せる下端柱体部分21にて回転伝達継手を形成する。
【0021】
又ドライブシャフト17を円柱体にし、上部円板18から上方へドライブシャフト17の上端部を突出し、該突出せる上端柱体部分20にてモーター継手を形成すると共に、下部円板19から下方へドライブシャフト17の下端部を突出し、該突出せる下端柱体部分21にて回転伝達継手を形成する。
【0022】
上記管杭6は円筒柱体であり、同管杭孔15は円筒孔であり、図7に示すように、上記ドライブシャフト17は上記管杭6の上端から上記管杭孔15内へ挿入し、軸線上に延在せしめる。
【0023】
そして上記ドライブシャフト17の挿入により下端柱体部分20(回転伝達継手)を上記角筒体14(回転伝達継手)内に挿入し、ドライブシャフト17と管杭6とを一体回転可能に連結する。即ち角柱体から成る下端柱体部分20と角筒体14の嵌合により、軸線方向への挿脱は可能であるが、回転方向には係合し一体回転継手を形成する。
【0024】
上記回転伝達継手は角柱体と角筒体の嵌合によって回転の伝達を図る構造としているが、上記ドライブシャフト17を円柱体にて形成し、該ドライブシャフト17の下端付近を管杭6の下端付近に係合してドライブシャフト17の回転力を管杭6に伝達する継手構造であれば、その他の凹と凸との係合等の雌雄係合構造を採用することができる。例えば図示の角筒体14を用いずに、ドライブシャフト17の下端(下端角柱体部分)を底板13の中心に空けた角孔内に挿入して回転伝達継手を構成することができる。
【0025】
上記回転伝達継手は軸線方向には挿脱が可能で、該軸線を中心とする回転方向に対しては回り止め継手を構成する。
【0026】
上記ドライブシャフト17の下部円板19は同シャフト17の挿入に伴い管杭孔15内に挿入されて管杭孔15の下端付近において上記角筒体14の上端面に当接し、同シャフト17の挿入深さを設定する。
【0027】
又ドライブシャフト17の上部円板18は同シャフト17の挿入に伴い管杭孔15内に挿入されて管杭孔15の上端の開口面付近、好ましくは同開口面と同レベルにおいて管杭孔15内に挿入される。
【0028】
上記上下円板18,19は互いに等径であり、管杭孔15に対しては等径又は僅かに小径にする。よって上下円板18,19を管杭孔15の内周面にて規制し、ドライブシャフト17の芯出しを図る。
【0029】
又上記管杭6の上端に管杭孔15を閉鎖する、図6A,Bに示すキャップ22を被嵌し、該キャップ22の底板を管杭6の上端面に当接し、同所においてフック23付きのボルト24にて一体に取り付ける。上記フック23は管杭6をクレーンによって吊り上げる手段である。
【0030】
上記キャップ22の中心部には上記ドライブシャフト17(角柱体)を貫挿するシャフト貫挿孔29を設け、該貫挿孔29を通し同シャフト17の上端柱体部分20を上方へ突出せしめる。
【0031】
又上記キャップ22の内面に上部円板18を当接してドライブシャフト17の上方への移動を阻止する。他方下部円板19にてドライブシャフト17の下方への移動を阻止する。即ち上下円板18,19はドライブシャフト17の軸線上における上下移動を阻止するストッパーを形成する。
【0032】
而して図8A,Bに示すように、上記管杭6をクレーンで吊り上げつつ地盤25に対し垂直に立設し、ドライブシャフト17の上端から突出する柱体部分20にクレーンで吊り上げたモーター26の駆動軸27を連結ピン30等にて着脱可に連結し、該モーター26の駆動によりドライブシャフト17の上端に回転力を与える。
【0033】
上記回転力は管杭6の下端付近に与えられ、管杭6を回転させつつ掘削刃7により縦穴28を自己掘削しつつ、該掘削した縦穴28内に管杭6を埋設する。該管杭6の埋設後、ボルト24を解除して上記モーター26とキャップ22とドライブシャフト17を一体に抜去する。
【0034】
上記埋設管杭6は支柱の基礎杭又は建造物の基礎杭として機能する。埋設管杭6の管杭孔15内には中込材、代表例として中込砕石や中込コンクリート(モルタルを含む)や中込土等を充填し、基礎杭としての強度を付加する。
【0035】
上記管杭6にて自己が埋設される縦穴28を自己掘削する工法は、掘削土を螺旋フィン10にて上方へ押し上げつつ、管杭6外周面により縦穴28内周面に押し付け縦穴強度を強化し、掘削土を残土として過度に排出しない。
【0036】
上記実施形態は管杭6の回転により地盤25に縦穴28を自己掘削しつつ、該縦穴28に管杭6を埋設し管杭基礎を形成する管杭6の埋設工法において、上記管杭6上端から管杭孔15内にドライブシャフト17を挿入し、該ドライブシャフト17の上端付近にモーター26等による回転力を与えて同シャフト17を回転し、該ドライブシャフト17の下端付近を管杭孔15の下端付近において管杭6と係脱可に係合し、該係合を介して上記ドライブシャフト17の回転力を管杭6の下端付近に付与し上記縦穴28を自己掘削する管杭6の埋設工法を開示している。
【0037】
又上記実施形態は管杭6の回転により地盤25に縦穴28を自己掘削しつつ該縦穴28に管杭6を埋設し管杭基礎を形成する管杭6の埋設装置において、管杭6上端から管杭孔15内に挿入されるドライブシャフト17を備え、該ドライブシャフト17の少なくとも下端付近に回転伝達継手を設け、他方上記管杭孔15の下端付近に上記管杭6と一体なる回転伝達継手を設け、該管杭6の回転伝達継手に上記ドライブシャフト17の回転伝達継手を係合し、該回転伝達継手による係合を介してドライブシャフト17の回転力を管杭6の下端付近に付与し上記縦穴28を自己掘削する管杭6の埋設装置を開示している。
【0038】
上記管杭6と管杭孔15とドライブシャフト17の「下端付近」、又は「上端付近」の用語は末端部を含む意味である。
【0039】
【発明の効果】
本発明によれば、管杭が元々所有する管杭孔に挿入されたドライブシャフトにより、掘削抵抗が最も加わる管杭下端付近に回転駆動力が直接的に与えられ、従来例における管杭の上端と下端間における捻れの原因を払拭し、管杭を健全に埋設することができる。又短時間で管杭の埋設が可能であり、基礎工事全体のコストダウンを達成できる。
【図面の簡単な説明】
【図1】従来の鋼管杭を回転しつつ縦穴を自己掘削し埋設する埋設工法における、鋼管杭に対する回転力付与手段を示す側面図。
【図2】本発明の管杭の埋設工法と同埋設装置を形成する掘削刃の側面図。
【図3】上記掘削刃の平面図。
【図4】本発明の管杭の埋設工法と同埋設装置を形成するドライブシャフトの側面図。
【図5】上記ドライブシャフトの平面図。
【図6】Aは管杭の上端に被嵌するキャップの平面図、Bは同断面図。
【図7】管杭の管杭孔内にドライブシャフトを挿入し組立てた状態を示す断面図。
【図8】A,Bは上記管杭により該管杭自身を埋設する縦穴を掘削する状態を説明する断面図。
【符号の説明】
6…管杭、7…掘削刃、8…穂先部、9…キャップ部、10…螺旋フィン、11…すくい刃、12…掘削縁、13…キャップ部の底板、14…角筒体、15…管杭孔、16…ボルト、17…ドライブシャフト、18…上部円板、19…下部円板、20…上端柱体部分、21…下端柱体部分、22…キャップ、23…フック、24…ボルト、25…地盤、26…モーター、27…駆動軸、28…縦穴、29…シャフト貫通孔、30…連結ピン、31…尾根部、32…谷部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for burying a pipe pile composed of a concrete pipe pile or a steel pipe pile forming a pipe pile foundation.
[0002]
[Prior art]
A vertical hole is excavated in the ground by an excavator, and a concrete pipe pile or a steel pipe pile is excavated in an excavator as a base construction method for constructing a building, such as a traffic sign, a guide plate, a street light, or the like. A pipe pile burying method of inserting a crushed stone or mortar into the pipe pile hole to insert a pillar into the pipe pile hole and construct a building has been widely implemented.
[0003]
On the other hand, as shown in Japanese Patent Publication No. 2-62848, an excavation blade is provided at the lower end of a steel pipe pile, and the steel pipe pile is erected on the ground and rotated to excavate a vertical hole in the ground with the excavation blade. There is a known construction method for burying the ground and improving the ground.By using this self-drilling pile, crushed stone or mortar is poured into the pipe pile hole buried in the ground to erect a pillar, The basic construction method of constructing is possible.
[0004]
[Problems to be solved by the invention]
However, the foundation method of excavating a vertical hole in advance and inserting a concrete pipe pile or a steel pipe pile into it has the disadvantage that a large amount of residual soil is discharged when excavating the vertical hole, and furthermore, earth and sand is buried in the excavated vertical hole. It collapses, hindering the insertion of pipe piles, and has problems that are difficult to implement on soft ground. In addition, there is a problem that play occurs between the vertical hole and the pipe pile, and the foundation strength is reduced. In addition, there is a problem that a lot of construction time is required and the cost is high.
[0005]
On the other hand, a drilling blade is attached to the lower end of a steel pipe pile by welding or the like, and a vertical hole is buried while excavating a vertical hole by the drilling blade. As shown in FIG. The integral cap 3 is fitted on the upper end of the steel pipe pile 4 and key-coupled 5, and the rotational force of the motor 1 is applied to the upper end of the steel pipe pile 4 through the cap 3 to rotate the steel pipe pile 4 and excavate. A method of excavating a vertical hole with a blade is adopted. In this method, a strong rotational force is applied to the upper peripheral surface of the steel pipe pile 4, whereas a large excavation resistance works against the lower end of the steel pipe pile 4. Therefore, there is a problem in that a twist is generated between the upper end and the lower end of the steel pipe pile 4 to cause deformation of the steel pipe pile 4, damage such as a crack, and misalignment of the vertical hole.
[0006]
[Means for Solving the Problems]
The present invention provides a method and apparatus for burying a pipe pile composed of a concrete pipe pile or a steel pipe pile, which appropriately solves the above problems.
[0007]
The method for burying a pipe pile according to the present invention utilizes a pipe pile hole of the pipe pile, inserts a drive shaft from the upper end into the pipe pile hole, and gives a rotational force by a motor or the like to the vicinity of the upper end of the drive shaft. To rotate the shaft in the pipe hole.
[0008]
The lower end of the drive shaft is detachably engaged with the pipe pile in the vicinity of the lower end of the pipe pile hole, and the rotational force of the drive shaft is applied to the lower end of the pipe pile through the engagement. The method of excavation is adopted.
[0009]
The burying device used in the above construction method includes a drive shaft inserted into the pipe pile hole from the upper end of the pipe pile, and a rotation transmission joint is provided near the lower end of the drive shaft, while near the lower end of the pipe pile hole. A rotation transmission joint integrated with the pipe pile is provided, the two rotation transmission joints are engaged with each other, and the rotational force of the drive shaft is applied to the vicinity of the lower end of the pipe pile through the engagement by the rotation transmission joint. It has a configuration to excavate a vertical hole by itself.
[0010]
In the pipe pile burying method and the same burying device, the drive shaft inserted into the pipe pile hole originally owned by the pipe pile, the rotational driving force is directly given to the vicinity of the bottom of the pipe pile where the excavation resistance is most applied, The cause of the twist between the upper end and the lower end of the pipe pile can be wiped out, and the pipe pile can be buried soundly.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0012]
As described above, the present invention relates to a method for burying a pipe pile and a burying apparatus for forming a pipe pile foundation, and targets concrete pipe piles, steel pipe piles, and the like.
[0013]
FIGS. 7 and 8 show a pipe pile 6 made of a concrete pipe as a representative example. As shown in FIGS. 2, 3 and 7, an excavating blade 7 is attached to the lower end (tip) of the pipe pile 6. The excavating blade 7 has a spike portion 8 having a hollow structure formed of a pyramid having a sharp tip, and an excavating edge 12 is formed at each corner of the pyramid.
[0014]
As shown in the figure, the spike portion 8 has a plurality of triangular ridges 31 extending in a circumferential direction from the base to the tip, and forms a triangular valley 32 between the ridges 31. The excavation edge 12 is formed by a ridge line (corresponding to the above-mentioned corner edge) of the ridge portion 31.
[0015]
The triangular valley portion 32 has a function of pushing the excavated soil along the slope of the ridge portion 31 (the slope of the valley portion 32) in the outer peripheral direction when the tip portion 8 rotates, thereby facilitating the propulsion of the pipe pile 6.
[0016]
Further, a cap portion 9 is integrally and concentrically connected to the base end of the tip portion 8, and a spiral fin 10 is integrally provided from the outer peripheral surface of the tip portion 8 to the outer peripheral surface of the cap portion 9. The rake blade 11 is integrally provided at the (tip end of the tip portion 8).
[0017]
Further, a rectangular cylindrical body 14 rising on the axis is integrally attached to the center of the bottom plate 13 of the cap portion 9, that is, the center of the bottom plate 13 integrally attached so as to close the base opening surface of the tip portion 8. The excavating blade 7 is integrally fitted on the outer peripheral surface of the lower end of the pipe pile 6 with the cap portion 9, and the rectangular cylinder 14 is set up on the axis of the pipe pile hole 15 in the lower end of the hole 15. This square cylinder 14 constitutes a rotation transmission joint.
[0018]
The cylindrical hole of the rectangular cylindrical body 14 is a through hole, and the upper end is opened into the pipe pile hole 15 of the pipe pile 6, and the lower end is opened through the bottom plate 13 into the cavity of the spike portion 8.
[0019]
The excavating blade 7 abuts the peripheral edge of the bottom plate 13 on the lower end surface of the pipe pile 6 and secures it with a bolt 16 at the same location to be integrated with the pipe pile 6. When the pipe pile 6 is a steel pipe pile, the excavating blade 7 can be integrally attached to the lower end of the pipe pile 6 by welding or the like.
[0020]
On the other hand, the drive shaft 17 shown in FIGS. 4 and 5 is formed by a prism, and disks 18 and 19 having the same diameter are integrally attached to the upper end and the lower end of the prism, and upward from the upper disk 18. The upper end of the prism is protruded to form a motor joint with the protruding upper column portion 20, and the lower end of the prism is protruded downward from the lower disk 19 and the protruding lower column portion 21 is formed. Form a rotation transmission joint.
[0021]
In addition, the drive shaft 17 is formed into a cylindrical body, the upper end of the drive shaft 17 is projected upward from the upper disk 18, a motor joint is formed at the projecting upper pillar 20, and the drive shaft 17 is driven downward from the lower disk 19. The lower end portion of the shaft 17 is projected, and the projected lower end pillar portion 21 forms a rotation transmission joint.
[0022]
The pipe pile 6 is a cylindrical column, the pipe pile hole 15 is a cylindrical hole, and the drive shaft 17 is inserted into the pipe pile hole 15 from the upper end of the pipe pile 6 as shown in FIG. , And extend on the axis.
[0023]
Then, by inserting the drive shaft 17, the lower end column portion 20 (the rotation transmission joint) is inserted into the rectangular cylinder 14 (the rotation transmission joint), and the drive shaft 17 and the pipe pile 6 are integrally rotatably connected. That is, although the lower column body portion 20 formed of a prism body and the rectangular cylinder body 14 are fitted into each other, insertion and removal in the axial direction are possible, but they engage in the rotation direction to form an integral rotary joint.
[0024]
The rotation transmission joint has a structure in which rotation is transmitted by fitting a prismatic body and a rectangular cylindrical body. The drive shaft 17 is formed of a cylindrical body, and the lower end of the drive shaft 17 is formed near the lower end of the pipe pile 6. As long as it is a joint structure that engages with the vicinity and transmits the rotational force of the drive shaft 17 to the pipe pile 6, other male and female engagement structures such as engagement between a concave and a convex can be adopted. For example, the rotation transmission joint can be formed by inserting the lower end (the lower end prism portion) of the drive shaft 17 into a square hole opened at the center of the bottom plate 13 without using the illustrated rectangular cylinder 14.
[0025]
The rotation transmission joint can be inserted and removed in the axial direction, and constitutes a detent joint in the rotation direction about the axis.
[0026]
The lower disk 19 of the drive shaft 17 is inserted into the pipe pile hole 15 with the insertion of the shaft 17, and abuts on the upper end surface of the rectangular cylindrical body 14 near the lower end of the pipe pile hole 15. Set the insertion depth.
[0027]
The upper disk 18 of the drive shaft 17 is inserted into the pipe pile hole 15 with the insertion of the shaft 17 so as to be near the opening surface at the upper end of the pipe pile hole 15, preferably at the same level as the opening surface. Inserted in.
[0028]
The upper and lower disks 18 and 19 have the same diameter, and the pipe pile hole 15 has the same diameter or a slightly smaller diameter. Therefore, the upper and lower disks 18 and 19 are regulated by the inner peripheral surface of the pipe pile hole 15, and the drive shaft 17 is centered.
[0029]
A cap 22 shown in FIGS. 6A and 6B for closing the pipe pile hole 15 is fitted on the upper end of the pipe pile 6, and the bottom plate of the cap 22 is brought into contact with the upper end surface of the pipe pile 6. It is attached integrally with the bolt 24 provided. The hook 23 is a means for lifting the pipe pile 6 by a crane.
[0030]
At the center of the cap 22, there is provided a shaft insertion hole 29 through which the drive shaft 17 (square prism) is inserted, and the upper end column portion 20 of the shaft 17 is projected upward through the insertion hole 29.
[0031]
Further, the upper disk 18 is brought into contact with the inner surface of the cap 22 to prevent the drive shaft 17 from moving upward. On the other hand, the lower disk 19 prevents the drive shaft 17 from moving downward. That is, the upper and lower disks 18 and 19 form a stopper for preventing the vertical movement on the axis of the drive shaft 17.
[0032]
As shown in FIGS. 8A and 8B, the pipe pile 6 is erected vertically with respect to the ground 25 while being lifted by the crane, and the motor 26 is lifted by the crane on the column 20 protruding from the upper end of the drive shaft 17. The drive shaft 27 is detachably connected by a connection pin 30 or the like, and a rotational force is applied to the upper end of the drive shaft 17 by driving the motor 26.
[0033]
The above-described rotational force is applied to the vicinity of the lower end of the pipe pile 6, and the pipe pile 6 is buried in the excavated vertical hole 28 while the pipe pile 6 is being rotated and the vertical hole 28 is excavated by the excavating blade 7 by itself. After burying the pipe pile 6, the bolt 24 is released and the motor 26, the cap 22, and the drive shaft 17 are integrally removed.
[0034]
The buried pipe pile 6 functions as a foundation pile for a pillar or a foundation pile for a building. The inside of the pipe pile hole 15 of the buried pipe pile 6 is filled with a filling material, typically a crushed stone, a filling concrete (including mortar), a filling soil, or the like, to add strength as a foundation pile.
[0035]
The method of excavating the vertical hole 28 in which the pipe pile 6 is buried by itself is enhanced by pushing the excavated soil upward with the spiral fin 10 and pressing the inner surface of the vertical hole 28 with the outer peripheral surface of the pipe pile 6 to enhance the vertical hole strength. The excavated soil will not be discharged excessively as surplus soil.
[0036]
In the above embodiment, the pipe pile 6 is buried in the vertical hole 28 by rotating the pipe pile 6 and the pipe pile 6 is buried in the vertical hole 28 to form a pipe pile foundation. The drive shaft 17 is inserted into the pipe pile hole 15 from above, and a rotational force is applied to the vicinity of the upper end of the drive shaft 17 by a motor 26 or the like to rotate the shaft 17. Near the lower end of the pipe pile 6, the rotational force of the drive shaft 17 is applied to the vicinity of the lower end of the pipe pile 6 through the engagement to self-drill the vertical hole 28. It discloses a burial method.
[0037]
In the above embodiment, the pipe pile 6 is buried in the vertical hole 28 by self-excavation of the vertical hole 28 in the ground 25 by the rotation of the pipe pile 6 to form a pipe pile foundation. A drive shaft 17 inserted into the pipe pile hole 15, a rotation transmission joint provided at least near the lower end of the drive shaft 17, and a rotation transmission joint integrated with the pipe pile 6 near the lower end of the pipe pile hole 15. The rotation transmission joint of the drive shaft 17 is engaged with the rotation transmission joint of the pipe pile 6, and the rotational force of the drive shaft 17 is applied to the vicinity of the lower end of the pipe pile 6 through the engagement by the rotation transmission joint. An apparatus for burying the pipe pile 6 for excavating the vertical hole 28 is disclosed.
[0038]
The term “near the lower end” or “near the upper end” of the pipe pile 6, the pipe pile hole 15, and the drive shaft 17 includes a terminal end.
[0039]
【The invention's effect】
According to the present invention, the drive shaft inserted into the pipe pile hole originally owned by the pipe pile provides a rotary driving force directly to the vicinity of the lower end of the pipe pile to which the excavation resistance is most applied. The cause of the twist between the and the lower end can be wiped out, and the pipe pile can be buried soundly. In addition, pipe piles can be buried in a short time, and the cost of the entire foundation work can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a rotating force applying means for a steel pipe pile in a conventional embedding method in which a vertical hole is self-excavated and buried while rotating the steel pipe pile.
FIG. 2 is a side view of a method for burying a pipe pile and a digging blade forming the burying device according to the present invention.
FIG. 3 is a plan view of the excavation blade.
FIG. 4 is a side view of a drive shaft forming the pipe pile burying method and the burying device according to the present invention.
FIG. 5 is a plan view of the drive shaft.
6A is a plan view of a cap fitted on an upper end of a pipe pile, and FIG. 6B is a sectional view of the same.
FIG. 7 is a sectional view showing a state in which a drive shaft is inserted into a pipe pile hole of the pipe pile and assembled.
8A and 8B are cross-sectional views illustrating a state in which a vertical hole for burying the pipe pile itself is excavated by the pipe pile. FIG.
[Explanation of symbols]
6 ... pipe pile, 7 ... excavation blade, 8 ... tip, 9 ... cap part, 10 ... spiral fin, 11 ... rake blade, 12 ... excavation edge, 13 ... bottom plate of cap part, 14 ... square cylinder, 15 ... Pipe pile hole, 16 bolt, 17 drive shaft, 18 upper disk, 19 lower disk, 20 upper column, 21 lower column, 22 cap, 23 hook, 24 bolt , 25 ... ground, 26 ... motor, 27 ... drive shaft, 28 ... vertical hole, 29 ... shaft through hole, 30 ... connecting pin, 31 ... ridge, 32 ... valley

Claims (5)

管杭の回転により地盤に縦穴を自己掘削しつつ該縦穴に管杭を埋設し管杭基礎を形成する管杭の埋設工法において、上記管杭上端から管杭孔内にドライブシャフトを挿入し、該ドライブシャフトの上端付近に回転力を与えて同シャフトを回転し、該ドライブシャフトの下端付近を管杭孔の下端付近において管杭と係脱可に係合し、該係合を介して上記ドライブシャフトの回転力を管杭の下端付近に付与し上記縦穴を自己掘削することを特徴とする管杭の埋設工法。In a method of burying a pipe pile in the vertical hole to form a pipe pile foundation while self-digging a vertical hole in the ground by rotation of the pipe pile, a drive shaft is inserted into the pipe pile hole from the upper end of the pipe pile, By applying a rotational force to the vicinity of the upper end of the drive shaft to rotate the shaft, the lower end of the drive shaft is detachably engaged with the pipe pile near the lower end of the pipe pile hole. A method for burying a pipe pile, characterized in that the vertical shaft is self-drilled by applying a rotational force of a drive shaft near a lower end of the pipe pile. 管杭の回転により地盤に縦穴を自己掘削しつつ該縦穴に管杭を埋設し管杭基礎を形成する管杭の埋設装置において、管杭上端から管杭孔内に挿入されるドライブシャフトを備え、該ドライブシャフトの少なくとも下端付近に回転伝達継手を設け、他方上記管杭孔の下端付近に上記管杭と一体なる回転伝達継手を設け、該管杭の回転伝達継手に上記ドライブシャフトの回転伝達継手を係合し、該回転伝達継手による係合を介してドライブシャフトの回転力を管杭の下端付近に付与し上記縦穴を自己掘削することを特徴とする管杭の埋設装置。A pipe pile burying device for burying a pipe pile in the vertical hole to form a pipe pile foundation while self-drilling a vertical hole in the ground by rotation of the pipe pile, comprising a drive shaft inserted into the pipe pile hole from the upper end of the pipe pile. A rotation transmission joint is provided at least near the lower end of the drive shaft, while a rotation transmission joint integrated with the pipe pile is provided near the lower end of the pipe pile hole, and rotation transmission of the drive shaft is transmitted to the rotation transmission joint of the pipe pile. An apparatus for burying a pipe pile, wherein a fitting is engaged, a rotational force of a drive shaft is applied to a vicinity of a lower end of the pipe pile through engagement by the rotation transmission joint, and the vertical hole is self-drilled. 上記ドライブシャフトを角柱体にて形成して同シャフト下端付近の角柱体部分で上記回転伝達継手を構成し、他方上記管杭の回転伝達継手を角筒体にて形成し、該角筒体内に上記角柱体部分を挿入して係合を図り上記回転力を付与する構成としたことを特徴とする請求項2記載の管杭の埋設装置。The drive shaft is formed of a prism, and the rotation transmission joint is formed by a prism portion near the lower end of the shaft. On the other hand, the rotation transmission joint of the pipe pile is formed of a prismatic body, and is formed in the prismatic body. 3. The pipe pile burying device according to claim 2, wherein said prismatic portion is inserted so as to be engaged to apply said rotational force. 上記ドライブシャフトに管杭上端から管杭孔内に挿入される円板を備え、該円板を管杭孔内面にて規制し、上記ドライブシャフトの芯出しを図る構成としたことを特徴とする請求項2記載の管杭の埋設装置。The drive shaft is provided with a disk inserted into the pipe pile hole from the upper end of the pipe pile, the disk is regulated by the inner surface of the pipe pile hole, and the drive shaft is centered. The pipe pile burying device according to claim 2. 上記ドライブシャフトの上端を上記管杭孔の上端から上方へ突出し、該突出部にモーターを結合し回転力を与える構成としたことを特徴とする請求項2記載の管杭の埋設装置。3. The pipe pile burying device according to claim 2, wherein an upper end of the drive shaft projects upward from an upper end of the pipe pile hole, and a motor is coupled to the projecting portion to apply a rotational force.
JP2002202747A 2002-07-11 2002-07-11 Embedment method for pipe pile and embedment apparatus for the same Pending JP2004044209A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009001966A (en) * 2007-06-19 2009-01-08 Jfe Steel Kk Steel pipe pile with blade
JP2010126975A (en) * 2008-11-27 2010-06-10 Chiyoda Geotech Co Ltd Rotatingly penetrated steel pipe and method of using the same
KR101187769B1 (en) * 2012-01-11 2012-10-04 (주)씨피티 Foundation construction method of marine structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009001966A (en) * 2007-06-19 2009-01-08 Jfe Steel Kk Steel pipe pile with blade
JP2010126975A (en) * 2008-11-27 2010-06-10 Chiyoda Geotech Co Ltd Rotatingly penetrated steel pipe and method of using the same
KR101187769B1 (en) * 2012-01-11 2012-10-04 (주)씨피티 Foundation construction method of marine structure

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