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JP3965572B2 - Pile connection structure - Google Patents
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JP3965572B2 - Pile connection structure - Google Patents

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JP3965572B2
JP3965572B2 JP2002242189A JP2002242189A JP3965572B2 JP 3965572 B2 JP3965572 B2 JP 3965572B2 JP 2002242189 A JP2002242189 A JP 2002242189A JP 2002242189 A JP2002242189 A JP 2002242189A JP 3965572 B2 JP3965572 B2 JP 3965572B2
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pile
bolt
end plate
connection structure
large diameter
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JP2004076533A (en
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貞男 藪内
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Asia Pile Holdings Corp
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Japan Pile Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、コンクリート杭や鋼管杭の接続構造に関し、特に、上杭と下杭を簡単かつ確実に接続することができる作業性の高い杭の接続構造に関するものである。
【0002】
【従来の技術】
従来、上杭と下杭を接続する杭の接続構造としては、上杭と下杭の端板同士を溶接により接続したり、端板の外周部にフランジ継手を突設し、この対設するフランジ継手間をボルト、ナットにて締結する方法が汎用されている。
また、上杭の端部と下杭の端部に、一対の内嵌部と外嵌部を振り分けて設けるとともに、これら内嵌部と外嵌部にそれぞれねじを形成し、内嵌部と外嵌部を螺合接続する方法もある。
【0003】
【発明が解決しようとする課題】
ところで、上記従来の上杭と下杭を接続する接続構造は、それぞれ次のような問題点を有している。
▲1▼溶接による杭の接続構造においては、溶接に時間を要したり、天候によっては施工現場において溶接作業を行うことができなかったり、さらに、溶接の欠陥や溶接部の脆化を防止するためには、所要の設備と熟練した技術者を必要とし、コストがかかったり、技術者が不足がちになる。
▲2▼フランジ継手による接続方法では、継手部分の外径が鋼管杭の外径よりも大きく、鋼管杭の外周面から大きく突出することから、杭を地盤中に埋設する際に大きな貫入抵抗となり、また継手部分に曲げモーメントが作用し、さらに継手部分間には杭の外周に空間が生じてしまい、水平支持力が確保できなくなるおそれがある。
▲3▼上杭の端部と下杭の端部に設けた内嵌部と外嵌部を螺合接続する杭の接続構造は、大径となる内嵌部と外嵌部にねじを形成するための機械加工がコスト高を招き、また、重量物である杭の螺合接続作業は作業性が悪く、多大な手間を要し、さらに、内嵌部と外嵌部に形成したねじが損傷を受けやすく、この場合には、螺合接続作業が困難になる。
【0004】
本発明は、上記従来の杭の接続構造が有する問題点に鑑み、上杭と下杭を簡単かつ確実に接続し、かつ杭径をこの接続部においても大径とならないようにすることができる作業性の高い杭の接続構造を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記目的を達成するため、本発明の杭の接続構造は、上杭と下杭とを各々の端板を介して接続する杭の接続構造において、端板に形成されたボルト穴にボルトを螺合するとともに、相手側の端板のボルトの対向位置に、ボルトの頭部が挿入される大径部と、該大径部と連通しボルト頭部の周方向の移行を許容する大径溝部と、該大径溝部からボルトの軸部を挟むように突設され、移行したボルトの頭部を掛止する鍔部とを形成し、ボルトを相手側端板の大径部に挿入して杭を回転させることにより、ボルト頭部を大径溝部に移行させて端板同士を固定するようにしたことを特徴とする。
【0006】
この杭の接続構造は、端板に形成されたボルト穴にボルトを螺合するとともに、相手側の端板のボルトの対向位置に、ボルトの頭部が挿入される大径部と、該大径部と連通しボルト頭部の周方向の移行を許容する大径溝部と、該大径溝部からボルトの軸部を挟むように突設され、移行したボルトの頭部を掛止する鍔部とを形成し、ボルトを相手側端板の大径部に挿入して杭を回転させることにより、ボルト頭部を大径溝部に移行させて端板同士を固定することから、上杭及び下杭の各端板同士をボルトを介して簡単に固定することができ、これにより、上杭と下杭の接続を迅速かつ安価に行うことができるとともに、杭の外周部に突起物がないことから、杭径を一定として貫入作業に支障なく杭を地盤中に埋設することができる。
また、本発明の杭の接続構造は、鋼管杭とプレストレスコンクリート杭との接続も強固に行うことができ、さらに、杭の接続が簡易かつ短時間に行えることから、杭の施工効率を大幅に向上させることができる。
【0007】
この場合において、前記ボルト穴として緊張用タップ穴を使用することができる。
【0008】
これにより、予めプレストレスコンクリート杭の端板に形成される緊張用タップ穴を利用して加工工程の手数を減じることができる。
【0009】
また、上杭及び下杭の各端板のボルト穴にボルトを螺合するとともに、各端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させることができる。
【0010】
これにより、上杭と下杭の端板を相互にボルトで固定することができ、杭の接続をより強固に行うことができる。
【0011】
また、上杭又は下杭の一方の端板のボルト穴にボルトを螺合するとともに、他方の端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させるようにすることができる。
【0012】
これにより、上杭と下杭の端板同士をボルトを介して簡易に固定することができる。
【0013】
また、ボルト頭部の下面と対向する鍔部の位置の片側に、塑性変形層を形成することができる。
【0014】
これにより、ボルト(ボルト頭部)が、相手側端板の大径部から大径溝部に移行するときに、ボルト頭部の下面が、塑性変形層と接触し、その摩擦抵抗により特定の一方向(ボルトを締め付ける方向)に回転して、ボルトによる締付力を出現させることができる。
【0015】
また、上杭と下杭の各端板に、回転させた位置で一致するキー溝を形成し、該キー溝に回り止めのキー部材を固設することができる。
【0016】
これにより、回転後の位置で上下の杭を固定して杭の逆回転を防止し、大径部からボルトが抜けることを防止することができる。
【0017】
【発明の実施の形態】
以下、本発明の杭の接続構造の実施の形態を図面に基づいて説明する。
【0018】
図1〜図3に、本発明の杭の接続構造の一実施例を示す。
この杭の接続構造は、上杭1と下杭2とを各々の端板3を介して接続するもので、上杭1と下杭2の各端板3に形成された杭を製造する際に使用される緊張用タップ穴4に、例えば、高力ボルト等のボルト5を螺合するとともに、相手側の端板3のボルト5の対向位置に、ボルト5の頭部51が挿入される大径部31と、該大径部31と連通しボルト頭部51の周方向の移行を許容する大径溝部32と、該大径溝部32からボルト5の軸部52を挟むように突設され、移行したボルト5の頭部51を掛止する鍔部33とを形成している。
そして、ボルト5を相手側端板3の大径部31に挿入し、その状態で、例えば上杭1を回転させることにより、ボルト頭部51を大径溝部32に移行させて端板3同士を固定するようにしている。
この場合、ボルト5は、ボルト5を相手側端板3の大径部31に挿入し、そのボルト頭部51を大径溝部32に移行させることができるように、所定長突出した状態に螺合しておくようにする。
【0019】
さらに、ボルト5(ボルト頭部51)が、相手側端板3の大径部31から大径溝部32に移行するときに、ボルト5が締まる方向に自然に回転するように、図1(b’)に示すように、ボルト頭部51の下面と対向する鍔部33の位置の片側に、ポリエチレン樹脂等の合成樹脂やアルミニウム等の金属からなる塑性変形層33aを、塑性変形層33aにボルト頭部51の下面が接触する程度の厚さに形成するようにする。これにより、ボルト5(ボルト頭部51)が、相手側端板3の大径部31から大径溝部32に移行するときに、ボルト頭部51の下面が、塑性変形層33aと接触し、その摩擦抵抗により特定の一方向(ボルト5を締め付ける方向)に回転して、ボルト5による締付力を出現させることができる。
【0020】
また、上杭1と下杭2の各端板3には、回転させた位置で一致するキー溝6が数カ所形成されている。このキー溝6には、回り止めのためのくさび状のキー部材7が打ち込みにより固設されている。
このように、杭1、2の回転後の位置で、上杭端板3のキー溝6と下杭端板3のキー溝6とをキー部材7で結合することにより、杭1、2の逆回転を防止し、大径部31からボルト5が抜けることを防止している。
なお、杭に曲げ力が加わると、キー部材7が抜けることも考えられるため、キー部材7を、図2(c)に示すように、縦型H型のように形成するとともに、キー溝6を同じ形状に形成することもできる。
【0021】
上杭1や下杭2は、プレストレストコンクリート杭等のコンクリート杭からなり、その端部には端板3が配設されている。
端板3には、PC鋼棒8に隣接するように、コンクリート杭にプレストレスをかける際に使用された複数の緊張用タップ穴4が等間隔で形成されており、これらの緊張用タップ穴4には、軸部52が少し出る状態で複数のボルト5が締着されている。
なお、突出する軸部52の長さは、後述する大径溝部32の鍔部33の厚みよりもやや長くなるようにする。
【0022】
これに対し、相手側の端板3のボルト5と対向する位置には、前記した大径部31と大径溝部32、そして、大径溝部32の表側の縁部から突設された鍔部33が形成されている。
大径部31は端板3を貫通するように形成され、また、大径溝部32は、鍔部33を残して大径部31を端板3の周方向に延長するように形成されている。この場合、複数の大径部31において、大径溝部32は同じ方向に延設されている。
なお、本実施例の場合(後述の図4に示す実施例も同様)、平面視して、下杭2に対して上杭1を左回転することにより、上杭1と下杭2を接続することができるが、このほか、後述の図5に示す実施例のように、平面視して、下杭2に対して上杭1を右回転することにより、上杭1と下杭2を接続するようにすることもできる。
上杭1と下杭2を接続するときには、図2〜図3に示すように、複数のボルト5をそれぞれ相手側端板3の大径部31に挿入し、その状態で上杭1を回転させることによって、ボルト頭部51を大径溝部32に移行させ、上杭1と下杭2の端板3同士を固定する。
そして、杭の回転後の位置で、上下の端板3のキー溝6にキー部材7を打ち込むことにより、杭の逆回転を防止し、大径部31からのボルト5の抜けを防止する。
【0023】
一方、図4に示すように、大径部31、大径溝部32及び鍔部33、又はボルト5は、上杭1や下杭2のいずれか一方の端板3にのみ形成することもできる。
すなわち、上杭1又は下杭2の一方の端板3の緊張用タップ穴4にボルト5を螺合するとともに、他方の端板3のボルト5の対向位置に大径部31と大径溝部32と鍔部33とを形成し、ボルト5を相手側端板3の大径部31に挿入して上杭1を回転させるようにする。
なお、大径部31、大径溝部32及び鍔部33を形成する端板3は、作用する曲げや引張力を考慮して、ボルト5側の端板3よりやや厚みを大きくすることが望ましい。
このように、大径部31、大径溝部32及び鍔部33を一方の端板3に、また、ボルト5を他方の端板3に形成することにより、上杭1と下杭2の端板3同士をボルト5を介して簡易に固定することができる。
【0024】
また、本発明の杭の接続構造は、鋼管杭同士、鋼管杭とコンクリート杭の組み合わせにも適用することができる。
すなわち、図5に示すように、筒状に形成された鋼管杭の端部に円環状の端板3を溶接等により固定し、例えば、上杭1の端板3に前記した大径部31、大径溝部32及び鍔部33を形成するとともに、下杭2の円環状の端板3にボルト穴を形成してボルト5を螺合する。
そして、上杭1と下杭2を接続するときには、複数のボルト5を相手側端板3の大径部31に挿入し、その状態で上杭1を回転させることによって、ボルト頭部51を大径溝部32に移行させ、上杭1と下杭2の端板3同士を固定する。
また、杭の回転後の位置で、上下の端板3のキー溝6にキー部材7を打ち込むことにより、杭の逆回転を防止し、大径部31からのボルト5の抜けを防止する。
【0025】
かくして、本実施例の杭の接続構造は、端板3に形成された緊張用タップ穴4にボルト5を螺合するとともに、相手側の端板3のボルト5の対向位置に、ボルト5の頭部51が挿入される大径部31と、該大径部31と連通しボルト頭部51の周方向の移行を許容する大径溝部32と、該大径溝部32からボルト5の軸部52を挟むように突設され、移行したボルト5の頭部51を掛止する鍔部33とを形成し、ボルト5を相手側端板3の大径部31に挿入して杭を回転させることにより、ボルト頭部51を大径溝部32に移行させて端板3同士を固定することから、上杭1及び下杭2の各端板3同士をボルト5を介して簡単に固定することができ、これにより、上杭1と下杭2の接続を迅速かつ安価に行うことができるとともに、杭の外周部に突起物がないことから、杭径を一定として貫入作業に支障なく杭を地盤中に埋設することができる。
そして、上杭1及び下杭2の各端板3の緊張用タップ穴4にボルト5を螺合するとともに、各端板3のボルト5の対向位置に大径部31と大径溝部32と鍔部33とを形成し、ボルト5を相手側端板3の大径部31に相互に挿入して杭を回転させることにより、上杭1と下杭2の端板3を相互にボルト5で固定することができ、杭の接続をより強固に行うことができる。
この場合、ボルト穴として緊張用タップ穴4を使用することにより、予めプレストレスコンクリート杭の端板3に形成される緊張用タップ穴4を利用して加工工程の手数を減じることができる。
また、本発明の杭の接続構造は、鋼管杭とプレストレスコンクリート杭との接続も強固に行うことができ、さらに、杭の接続が簡易かつ短時間に行えることから、杭の施工効率を大幅に向上させることができる。
【0026】
以上、本発明の実施例を説明したが、本発明の杭の接続構造はこの実施例に記載した構成に限定されるものではなく、各実施例に記載した構成を適宜組み合わせたり、端板に鋼材や鋳鉄を適宜使用する等、その趣旨を逸脱しない範囲において適宜その構成を変更することができる。
【0027】
【発明の効果】
本発明の杭の接続構造によれば、端板に形成されたボルト穴にボルトを螺合するとともに、相手側の端板のボルトの対向位置に、ボルトの頭部が挿入される大径部と、該大径部と連通しボルト頭部の周方向の移行を許容する大径溝部と、該大径溝部からボルトの軸部を挟むように突設され、移行したボルトの頭部を掛止する鍔部とを形成し、ボルトを相手側端板の大径部に挿入して杭を回転させることにより、ボルト頭部を大径溝部に移行させて端板同士を固定することから、上杭及び下杭の各端板同士をボルトを介して簡単に固定することができ、これにより、上杭と下杭の接続を迅速かつ安価に行うことができるとともに、杭の外周部に突起物がないことから、杭径を一定として貫入作業に支障なく杭を地盤中に埋設することができる。
また、本発明の杭の接続構造は、鋼管杭とプレストレスコンクリート杭との接続も強固に行うことができ、さらに、杭の接続が簡易かつ短時間に行えることから、杭の施工効率を大幅に向上させることができる。
【0028】
この場合、前記ボルト穴として緊張用タップ穴を使用することにより、予めプレストレスコンクリート杭の端板に形成される緊張用タップ穴を利用して施工の工数を減じることができる。
【0029】
また、上杭及び下杭の各端板のボルト穴にボルトを螺合するとともに、各端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させることにより、上杭と下杭の端板を相互にボルトで固定することができ、杭の接続をより強固に行うことができる。
【0030】
また、上杭又は下杭の一方の端板のボルト穴にボルトを螺合するとともに、他方の端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させるようにすることにより、上杭と下杭の端板同士をボルトを介して簡易に固定することができる。
【0031】
また、ボルト頭部の下面と対向する鍔部の位置の片側に、塑性変形層を形成することにより、ボルト(ボルト頭部)が、相手側端板の大径部から大径溝部に移行するときに、ボルト頭部の下面が、塑性変形層と接触し、その摩擦抵抗により特定の一方向(ボルトを締め付ける方向)に回転して、ボルトによる締付力を出現させることができる。
【0032】
また、上杭と下杭の各端板に、回転させた位置で一致するキー溝を形成し、該キー溝に回り止めのキー部材を固設することにより、回転後の位置で上下の杭を固定して杭の逆回転を防止し、大径部からボルトが抜けることを防止することができる。
【図面の簡単な説明】
【図1】本発明の杭の接続構造の一実施例を示し、(a)は杭の端板の要部拡大平面図、(b)は端板の裏側から見た大径部と大径溝部の正面図、(b’)は塑性変形層を形成した状態を示す端板の裏側から見た大径部と大径溝部の正面図、(c)は杭の要部拡大断面図である。
【図2】同実施例の杭の接続構造の接続工程を示す要部拡大断面図である。
【図3】上杭の端板と下杭の端板をそれぞれ表側から見た正面図である。
【図4】他の実施例の上杭の端板と下杭の端板をそれぞれ表側から見た正面図である。
【図5】鋼管杭の接続構造を示し、(a)は上杭の端板の底面図、(b)は上杭と下杭の接続を示す断面図である。
【符号の説明】
1 上杭
2 下杭
3 端板
31 大径部
32 大径溝部
33 鍔部
33a 塑性変形層
4 緊張用タップ穴
5 ボルト
51 頭部
52 軸部
6 キー溝
7 キー部材
8 PC鋼棒
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure for concrete piles and steel pipe piles, and more particularly to a connection structure for piles with high workability capable of easily and reliably connecting an upper pile and a lower pile.
[0002]
[Prior art]
Conventionally, as the connection structure of the pile that connects the upper pile and the lower pile, the end plates of the upper pile and the lower pile are connected by welding, or a flange joint is protruded from the outer peripheral portion of the end plate, and this is installed. A method of fastening between flange joints with bolts and nuts is widely used.
In addition, a pair of internal fitting portions and external fitting portions are provided separately on the end portion of the upper pile and the end portion of the lower pile, and screws are formed in the internal fitting portion and the external fitting portion, respectively. There is also a method of screwing the fitting portion.
[0003]
[Problems to be solved by the invention]
By the way, the connection structure which connects the said conventional upper pile and lower pile has the following problems, respectively.
(1) In the connection structure of piles by welding, it takes time for welding, and depending on the weather, welding work cannot be performed at the construction site, and further, welding defects and weld brittleness are prevented. In order to do so, it requires the necessary equipment and skilled technicians, which is costly and lacks engineers.
(2) In the connection method using flange joints, the outer diameter of the joint part is larger than the outer diameter of the steel pipe pile and protrudes greatly from the outer peripheral surface of the steel pipe pile, resulting in large penetration resistance when the pile is embedded in the ground. In addition, a bending moment acts on the joint part, and a space is generated between the joint parts on the outer periphery of the pile, and there is a possibility that the horizontal supporting force cannot be secured.
(3) The connection structure of the pile that connects the inner fitting portion and the outer fitting portion provided at the end portion of the upper pile and the lower pile portion is formed with a screw in the inner fitting portion and the outer fitting portion having a large diameter. Machining is expensive, and the heavy screw pile connection work is inferior in workability, requiring a lot of labor, and the screws formed on the inner and outer fitting parts In this case, the screw connection work becomes difficult.
[0004]
In view of the problems of the conventional pile connection structure described above, the present invention can easily and reliably connect the upper pile and the lower pile, and the pile diameter can be prevented from becoming a large diameter even in this connection portion. It aims at providing the connection structure of a pile with high workability.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the pile connection structure of the present invention is a pile connection structure in which an upper pile and a lower pile are connected via respective end plates, and bolts are screwed into bolt holes formed in the end plates. A large-diameter portion into which the head of the bolt is inserted, and a large-diameter groove portion that communicates with the large-diameter portion and allows a transition in the circumferential direction of the bolt head. And projecting so as to sandwich the shaft portion of the bolt from the large-diameter groove, and forming a flange portion that hooks the head of the transitioned bolt, and inserting the bolt into the large-diameter portion of the mating end plate By rotating the pile, the bolt head is moved to the large-diameter groove and the end plates are fixed.
[0006]
This pile connection structure includes a large-diameter portion into which a bolt head is inserted at a position opposite to a bolt of a mating end plate, and a bolt is formed in the bolt hole formed in the end plate. A large-diameter groove portion that communicates with the diameter portion and allows the bolt head to move in the circumferential direction, and a flange portion that projects from the large-diameter groove portion so as to sandwich the shaft portion of the bolt and hooks the bolt head portion that has been transferred The bolts are inserted into the large-diameter portion of the mating end plate and the pile is rotated to move the bolt head to the large-diameter groove and fix the end plates to each other. Each end plate of the piles can be easily fixed with bolts, so that the upper pile and the lower pile can be connected quickly and inexpensively and there is no protrusion on the outer periphery of the pile Therefore, the pile can be buried in the ground without any hindrance to the penetration work with a fixed pile diameter.
In addition, the pile connection structure of the present invention can firmly connect the steel pipe pile and the prestressed concrete pile, and can also connect the pile easily and in a short time, greatly increasing the construction efficiency of the pile. Can be improved.
[0007]
In this case, a tension tap hole can be used as the bolt hole.
[0008]
Thereby, the labor of a processing process can be reduced using the tap hole for tension previously formed in the end plate of a prestress concrete pile.
[0009]
In addition, the bolts are screwed into the bolt holes of the end plates of the upper pile and the lower pile, and a large diameter portion, a large diameter groove portion and a flange portion are formed at the opposing positions of the bolts of each end plate. The piles can be rotated by inserting each other into the large diameter part of the end plate.
[0010]
Thereby, the end plate of an upper pile and a lower pile can be mutually fixed with a volt | bolt, and the connection of a pile can be performed more firmly.
[0011]
In addition, the bolt is screwed into the bolt hole of one end plate of the upper pile or the lower pile, and a large diameter portion, a large diameter groove portion, and a flange portion are formed at the opposite position of the bolt of the other end plate, and the bolt is The piles can be rotated by inserting each other into the large diameter portion of the mating end plate.
[0012]
Thereby, the end plates of an upper pile and a lower pile can be simply fixed through a bolt.
[0013]
Moreover, a plastic deformation layer can be formed on one side of the position of the flange facing the lower surface of the bolt head.
[0014]
As a result, when the bolt (bolt head) moves from the large-diameter portion of the counterpart end plate to the large-diameter groove, the lower surface of the bolt head contacts the plastic deformation layer, and the specific resistance is determined by the frictional resistance. By rotating in the direction (the direction in which the bolt is tightened), the tightening force by the bolt can appear.
[0015]
Moreover, the key groove which corresponds in the rotated position can be formed in each end plate of an upper pile and a lower pile, and the key member of rotation prevention can be fixedly installed in this key groove.
[0016]
Thereby, an upper and lower pile can be fixed in the position after rotation, a reverse rotation of a pile can be prevented, and it can prevent that a volt | bolt comes off from a large diameter part.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a pile connection structure of the present invention will be described with reference to the drawings.
[0018]
1 to 3 show an embodiment of a pile connection structure of the present invention.
The connection structure of this pile connects the upper pile 1 and the lower pile 2 via each end plate 3, and when manufacturing the pile formed in each end plate 3 of the upper pile 1 and the lower pile 2 For example, a bolt 5 such as a high-strength bolt is screwed into the tension tap hole 4 used for the bolt 5 and a head 51 of the bolt 5 is inserted at a position opposite to the bolt 5 of the other end plate 3. A large-diameter portion 31, a large-diameter groove portion 32 that communicates with the large-diameter portion 31 and permits the circumferential transition of the bolt head portion 51, and a shaft portion 52 of the bolt 5 that protrudes from the large-diameter groove portion 32. Thus, a flange 33 for hooking the head 51 of the bolt 5 that has been transferred is formed.
And the bolt 5 is inserted in the large diameter part 31 of the other party end plate 3, and the upper head 1 is rotated in that state, for example, The bolt head 51 is shifted to the large diameter groove part 32, and end plates 3 Is fixed.
In this case, the bolt 5 is screwed into a state where the bolt 5 protrudes a predetermined length so that the bolt 5 can be inserted into the large diameter portion 31 of the counterpart end plate 3 and the bolt head 51 can be transferred to the large diameter groove portion 32. Try to keep them together.
[0019]
Further, when the bolt 5 (bolt head 51) moves from the large diameter portion 31 of the mating end plate 3 to the large diameter groove portion 32, the bolt 5 naturally rotates in the tightening direction as shown in FIG. '), A plastic deformation layer 33a made of a synthetic resin such as polyethylene resin or a metal such as aluminum is provided on one side of the position of the flange portion 33 facing the lower surface of the bolt head 51, and a bolt is attached to the plastic deformation layer 33a. It is formed so as to have a thickness such that the lower surface of the head 51 comes into contact. Thereby, when the bolt 5 (bolt head 51) transitions from the large diameter portion 31 of the counterpart end plate 3 to the large diameter groove portion 32, the lower surface of the bolt head 51 comes into contact with the plastic deformation layer 33a, By the frictional resistance, it can rotate in a specific direction (the direction in which the bolt 5 is tightened), and the tightening force by the bolt 5 can appear.
[0020]
In addition, the end plates 3 of the upper pile 1 and the lower pile 2 are formed with several key grooves 6 that coincide with each other at the rotated position. A wedge-shaped key member 7 for preventing rotation is fixed in the key groove 6 by driving.
Thus, by connecting the key groove 6 of the upper pile end plate 3 and the key groove 6 of the lower pile end plate 3 with the key member 7 at the position after the rotation of the piles 1, 2, The reverse rotation is prevented and the bolt 5 is prevented from coming off from the large diameter portion 31.
In addition, since it is also considered that the key member 7 comes off when a bending force is applied to the pile, the key member 7 is formed like a vertical H shape as shown in FIG. Can be formed in the same shape.
[0021]
The upper pile 1 and the lower pile 2 are made of a concrete pile such as a prestressed concrete pile, and an end plate 3 is disposed at an end thereof.
A plurality of tension tap holes 4 used for prestressing the concrete pile are formed at equal intervals in the end plate 3 so as to be adjacent to the PC steel bar 8, and these tension tap holes are formed. 4, a plurality of bolts 5 are fastened with the shaft portion 52 slightly protruding.
In addition, the length of the protruding shaft portion 52 is set to be slightly longer than the thickness of the flange portion 33 of the large-diameter groove portion 32 described later.
[0022]
On the other hand, at the position facing the bolt 5 of the other end plate 3, the large-diameter portion 31, the large-diameter groove portion 32, and the flange portion protruding from the front edge of the large-diameter groove portion 32. 33 is formed.
The large diameter portion 31 is formed so as to penetrate the end plate 3, and the large diameter groove portion 32 is formed so as to extend the large diameter portion 31 in the circumferential direction of the end plate 3 while leaving the flange 33. . In this case, in the plurality of large-diameter portions 31, the large-diameter groove portions 32 are extended in the same direction.
In the case of the present embodiment (the same is true for the embodiment shown in FIG. 4 described later), the upper pile 1 and the lower pile 2 are connected by rotating the upper pile 1 counterclockwise with respect to the lower pile 2 in plan view. In addition, the upper pile 1 and the lower pile 2 can be moved by rotating the upper pile 1 to the right with respect to the lower pile 2 in plan view as in the embodiment shown in FIG. It can also be connected.
When connecting the upper pile 1 and the lower pile 2, as shown in FIGS. 2 to 3, a plurality of bolts 5 are respectively inserted into the large-diameter portions 31 of the counterpart end plate 3 and the upper pile 1 is rotated in that state. By doing so, the bolt head 51 is shifted to the large-diameter groove 32 and the end plates 3 of the upper pile 1 and the lower pile 2 are fixed together.
Then, by driving the key member 7 into the key groove 6 of the upper and lower end plates 3 at the position after the rotation of the pile, the reverse rotation of the pile is prevented and the bolt 5 is prevented from coming off from the large diameter portion 31.
[0023]
On the other hand, as shown in FIG. 4, the large-diameter portion 31, the large-diameter groove portion 32 and the flange portion 33, or the bolt 5 can be formed only on one end plate 3 of the upper pile 1 or the lower pile 2. .
That is, the bolt 5 is screwed into the tension tap hole 4 of the one end plate 3 of the upper pile 1 or the lower pile 2 and the large diameter portion 31 and the large diameter groove portion are opposed to the bolt 5 of the other end plate 3. 32 and the flange part 33 are formed, and the bolt 5 is inserted into the large diameter part 31 of the mating end plate 3 so that the upper pile 1 is rotated.
The end plate 3 forming the large diameter portion 31, the large diameter groove portion 32, and the flange portion 33 is preferably slightly thicker than the end plate 3 on the bolt 5 side in consideration of the acting bending and tensile force. .
Thus, the end of the upper pile 1 and the lower pile 2 is formed by forming the large diameter portion 31, the large diameter groove portion 32, and the flange portion 33 on one end plate 3 and the bolt 5 on the other end plate 3. The plates 3 can be easily fixed together with bolts 5.
[0024]
Moreover, the connection structure of the pile of this invention is applicable also to the combination of steel pipe piles, a steel pipe pile, and a concrete pile.
That is, as shown in FIG. 5, an annular end plate 3 is fixed to an end portion of a steel pipe pile formed in a cylindrical shape by welding or the like, for example, the large-diameter portion 31 described above on the end plate 3 of the upper pile 1. The large diameter groove portion 32 and the flange portion 33 are formed, and a bolt hole is formed in the annular end plate 3 of the lower pile 2 and the bolt 5 is screwed.
And when connecting the upper pile 1 and the lower pile 2, by inserting the some volt | bolt 5 in the large diameter part 31 of the other party end plate 3, and rotating the upper pile 1 in that state, the bolt head 51 is attached. It transfers to the large diameter groove part 32, and the end plates 3 of the upper pile 1 and the lower pile 2 are fixed.
Further, by driving the key member 7 into the key groove 6 of the upper and lower end plates 3 at the position after the rotation of the pile, the reverse rotation of the pile is prevented and the bolt 5 is prevented from coming off from the large diameter portion 31.
[0025]
Thus, in the connection structure of the pile of this embodiment, the bolt 5 is screwed into the tension tap hole 4 formed in the end plate 3, and the bolt 5 is opposed to the bolt 5 on the opposite end plate 3. A large-diameter portion 31 into which the head portion 51 is inserted, a large-diameter groove portion 32 that communicates with the large-diameter portion 31 and allows the circumferential transition of the bolt head portion 51, and the shaft portion of the bolt 5 from the large-diameter groove portion 32 52 is formed so as to sandwich the head portion 51 of the bolt 5 that has been transferred, and the bolt 5 is inserted into the large-diameter portion 31 of the counterpart end plate 3 to rotate the pile. Thus, the bolt head 51 is shifted to the large-diameter groove portion 32 and the end plates 3 are fixed to each other, so that the end plates 3 of the upper pile 1 and the lower pile 2 are easily fixed via the bolts 5. As a result, the upper pile 1 and the lower pile 2 can be connected quickly and inexpensively, and the outer periphery of the pile Since there is no projection, without hindrance pile penetration work pile diameter as constant can be embedded in the ground to.
And while screwing the bolt 5 in the tap hole 4 for tension | tensile_strength of each end plate 3 of the upper pile 1 and the lower pile 2, and the large diameter part 31 and the large diameter groove part 32 in the opposing position of the bolt 5 of each end plate 3, By forming the flange portion 33 and inserting the bolts 5 into the large diameter portion 31 of the counterpart end plate 3 and rotating the pile, the end plates 3 of the upper pile 1 and the lower pile 2 are mutually connected to the bolt 5. The pile can be connected more firmly.
In this case, by using the tension tap hole 4 as a bolt hole, the number of machining steps can be reduced by using the tension tap hole 4 formed in the end plate 3 of the prestressed concrete pile in advance.
In addition, the pile connection structure of the present invention can firmly connect the steel pipe pile and the prestressed concrete pile, and can also connect the pile easily and in a short time, greatly increasing the construction efficiency of the pile. Can be improved.
[0026]
As mentioned above, although the Example of this invention was described, the connection structure of the pile of this invention is not limited to the structure described in this Example, The structure described in each Example is combined suitably, or it is an end plate. The structure can be appropriately changed within a range not departing from the gist, such as appropriately using a steel material or cast iron.
[0027]
【The invention's effect】
According to the pile connection structure of the present invention, the bolt is screwed into the bolt hole formed in the end plate, and the large-diameter portion into which the head of the bolt is inserted at the opposite position of the bolt of the mating end plate A large-diameter groove portion that communicates with the large-diameter portion and allows the bolt head to move in the circumferential direction, and projects so as to sandwich the bolt shaft portion from the large-diameter groove portion, and the head portion of the bolt that has been transferred is hung. By forming the collar part to be stopped, inserting the bolt into the large diameter part of the counterpart end plate and rotating the pile, the bolt head is moved to the large diameter groove part and the end plates are fixed to each other. The end plates of the upper and lower piles can be easily fixed to each other via bolts, so that the upper pile and the lower pile can be connected quickly and inexpensively and protruded from the outer periphery of the pile. Since there are no objects, the pile diameter can be fixed and the pile can be buried in the ground without any hindrance to the penetration work.
In addition, the pile connection structure of the present invention can firmly connect the steel pipe pile and the prestressed concrete pile, and can also connect the pile easily and in a short time, greatly increasing the construction efficiency of the pile. Can be improved.
[0028]
In this case, by using a tension tap hole as the bolt hole, it is possible to reduce the number of construction steps by using the tension tap hole formed in the end plate of the prestressed concrete pile in advance.
[0029]
In addition, the bolts are screwed into the bolt holes of the end plates of the upper pile and the lower pile, and a large diameter portion, a large diameter groove portion and a flange portion are formed at the opposing positions of the bolts of each end plate. By rotating the pile by inserting it into the large-diameter portion of the end plate, the end plates of the upper pile and the lower pile can be fixed to each other with bolts, and the pile can be connected more firmly.
[0030]
In addition, the bolt is screwed into the bolt hole of one end plate of the upper pile or the lower pile, and a large diameter portion, a large diameter groove portion, and a flange portion are formed at the opposite position of the bolt of the other end plate, and the bolt is By inserting each other into the large-diameter portion of the mating end plate and rotating the pile, the end plates of the upper pile and the lower pile can be easily fixed via bolts.
[0031]
Further, by forming a plastic deformation layer on one side of the collar portion facing the lower surface of the bolt head, the bolt (bolt head) moves from the large diameter portion of the mating end plate to the large diameter groove portion. Sometimes, the lower surface of the bolt head comes into contact with the plastic deformation layer and rotates in a specific direction (direction in which the bolt is tightened) by its frictional resistance, so that a tightening force by the bolt can appear.
[0032]
In addition, by forming a key groove that coincides at the rotated position on each end plate of the upper pile and the lower pile, and fixing a key member for rotation prevention to the key groove, the upper and lower piles at the rotated position. Can be fixed to prevent reverse rotation of the pile and to prevent the bolt from coming off from the large diameter portion.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a pile connection structure of the present invention, (a) is an enlarged plan view of a main part of an end plate of the pile, and (b) is a large diameter portion and a large diameter viewed from the back side of the end plate. The front view of a groove part, (b ') is the front view of the large diameter part and large diameter groove part which were seen from the back side of the end plate which shows the state which formed the plastic deformation layer, (c) is the principal part expanded sectional view of a pile. .
FIG. 2 is an enlarged cross-sectional view of a main part showing a connection process of a pile connection structure according to the embodiment.
FIG. 3 is a front view of an end plate of an upper pile and an end plate of a lower pile as viewed from the front side.
FIG. 4 is a front view of an end plate of an upper pile and an end plate of a lower pile as viewed from the front side according to another embodiment.
FIG. 5 shows a steel pipe pile connection structure, (a) is a bottom view of the end plate of the upper pile, and (b) is a cross-sectional view showing the connection between the upper pile and the lower pile.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper pile 2 Lower pile 3 End plate 31 Large diameter part 32 Large diameter groove part 33 Gutter part 33a Plastic deformation layer 4 Tension tap hole 5 Bolt 51 Head 52 Shaft part 6 Key groove 7 Key member 8 PC steel rod

Claims (6)

上杭と下杭とを各々の端板を介して接続する杭の接続構造において、端板に形成したボルト穴にボルトを螺合するとともに、相手側の端板のボルトの対向位置に、ボルトの頭部が挿入される大径部と、該大径部と連通しボルト頭部の周方向の移行を許容する大径溝部と、該大径溝部からボルトの軸部を挟むように突設され、移行したボルトの頭部を掛止する鍔部とを形成し、ボルトを相手側端板の大径部に挿入して杭を回転させることにより、ボルト頭部を大径溝部に移行させて端板同士を固定するようにしたことを特徴とする杭の接続構造。In the connection structure of the pile that connects the upper pile and the lower pile via each end plate, the bolt is screwed into the bolt hole formed in the end plate, and the bolt is placed at the opposite position of the bolt on the opposite end plate. A large-diameter portion into which the head portion of the bolt is inserted, a large-diameter groove portion that communicates with the large-diameter portion and permits the circumferential transition of the bolt head portion, and projects so as to sandwich the shaft portion of the bolt from the large-diameter groove portion The bolt head is moved to the large-diameter groove by inserting the bolt into the large-diameter portion of the mating end plate and rotating the pile. A pile connection structure characterized in that end plates are fixed together. 前記ボルト穴として緊張用タップ穴を使用することを特徴とする請求項1記載の杭の接続構造。2. The pile connection structure according to claim 1, wherein a tension tap hole is used as the bolt hole. 上杭及び下杭の各端板のボルト穴にボルトを螺合するとともに、各端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させるようにしたことを特徴とする請求項1又は2記載の杭の接続構造。The bolts are screwed into the bolt holes of the end plates of the upper pile and the lower pile, and a large diameter portion, a large diameter groove portion and a flange portion are formed at the opposite positions of the bolts of each end plate, and the bolt is connected to the other end plate. The pile connection structure according to claim 1, wherein the pile is rotated by being inserted into the large diameter portion of the pile. 上杭又は下杭の一方の端板のボルト穴にボルトを螺合するとともに、他方の端板のボルトの対向位置に大径部と大径溝部と鍔部とを形成し、ボルトを相手側端板の大径部に相互に挿入して杭を回転させるようにしたことを特徴とする請求項1又は2記載の杭の接続構造。A bolt is screwed into the bolt hole of one end plate of the upper pile or the lower pile, and a large diameter portion, a large diameter groove portion and a flange portion are formed at the opposite position of the bolt of the other end plate. The pile connection structure according to claim 1 or 2, wherein the pile is rotated by being inserted into the large diameter portion of the end plate. ボルト頭部の下面と対向する鍔部の位置の片側に、塑性変形層を形成するようにしたことを特徴とする請求項1、2、3又は4記載の杭の接続構造。The pile connection structure according to claim 1, 2, 3 or 4, wherein a plastic deformation layer is formed on one side of the position of the flange facing the lower surface of the bolt head. 上杭と下杭の各端板に、回転させた位置で一致するキー溝を形成し、該キー溝に回り止めのキー部材を固設するようにしたことを特徴とする請求項1、2、3、4又は5記載の杭の接続構造。A key groove that coincides with each other at the rotated position is formed on each end plate of the upper pile and the lower pile, and a key member for preventing rotation is fixed to the key groove. The pile connection structure according to 3, 4, or 5.
JP2002242189A 2002-08-22 2002-08-22 Pile connection structure Expired - Fee Related JP3965572B2 (en)

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CN102689358B (en) * 2012-06-21 2014-07-16 江苏建华管桩有限公司 Tensioning component and tensioning method of prestressed endless sheet pile and pile including component
KR102268120B1 (en) * 2020-07-13 2021-06-25 피에이치씨탑다운(주) PHC pile construction method using casing guide and removeable auxiliary pile
KR102267641B1 (en) * 2020-07-13 2021-06-22 피에이치씨탑다운(주) PHC pile construction method using joint PHC pile and detachable auxiliary pile

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