JP6481555B2 - Steel pipe pile joint rotation deterrent structure - Google Patents

Steel pipe pile joint rotation deterrent structure Download PDF

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JP6481555B2
JP6481555B2 JP2015150453A JP2015150453A JP6481555B2 JP 6481555 B2 JP6481555 B2 JP 6481555B2 JP 2015150453 A JP2015150453 A JP 2015150453A JP 2015150453 A JP2015150453 A JP 2015150453A JP 6481555 B2 JP6481555 B2 JP 6481555B2
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steel pipe
fitting
joint
pipe pile
shaft
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JP2017031590A (en
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吉郎 石濱
吉郎 石濱
雅司 北濱
雅司 北濱
弘信 松宮
弘信 松宮
俊彦 坂本
俊彦 坂本
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Nippon Steel Corp
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Nippon Steel and Sumitomo Metal Corp
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Description

本発明は、複数の鋼管杭を連結して相対回転を抑止する鋼管杭継手の回転抑止構造に関する。   The present invention relates to a rotation prevention structure for a steel pipe pile joint that connects a plurality of steel pipe piles to inhibit relative rotation.

従来から、鋼管を施工する際に衝撃や振動等が作用しても、せん断キーの緩みや脱落を抑制できるものとして、例えば、特許文献1に開示された鋼管杭継手のせん断キー構造が提案されている。   Conventionally, for example, a shear key structure of a steel pipe pile joint disclosed in Patent Document 1 has been proposed as a means of suppressing loosening or falling off of a shear key even when an impact, vibration, or the like is applied when constructing a steel pipe. ing.

特許文献1に開示された鋼管杭継手のせん断キー構造は、複数本の鋼管をそれらの長手方向に連結する際に、これら鋼管同士の軸回りの相対回転を防止するものであり、各鋼管間を連結する継手材に固定されたねじと、底部にねじを通す貫通孔を備えた凹部が形成されたキー本体と、ねじにねじ止めされて凹部内に配置されたナットと、ナットの外周と凹部の側壁との隙間を埋めるように設けられた弾性体とを備える。   The shear key structure of the steel pipe pile joint disclosed in Patent Document 1 prevents relative rotation about the axis of these steel pipes when connecting a plurality of steel pipes in their longitudinal direction. A key fixed to a joint material for connecting the screw, a key body having a recess with a through hole through which the screw passes, a nut screwed to the screw and disposed in the recess, an outer periphery of the nut, And an elastic body provided so as to fill a gap with the side wall of the recess.

特許文献1に開示された鋼管杭継手のせん断キー構造は、各鋼管間でボックス継手材とピン継手材の両方を跨いて設けられた窪みに、ボックス継手材とピン継手材とが相対的に回転するのを抑止するためのせん断キーが取り付けられる。特許文献1に開示された鋼管杭継手のせん断キー構造は、ねじの先端を窪み内に突出させて、ねじの先端にキー本体やナットが取り付けられる。   The shear key structure of the steel pipe pile joint disclosed in Patent Document 1 is such that the box joint material and the pin joint material are relatively placed in a recess provided across both the box joint material and the pin joint material between the steel pipes. A shearing key is attached to prevent rotation. In the shear key structure of the steel pipe pile joint disclosed in Patent Document 1, the tip of the screw is protruded into the recess, and the key body and the nut are attached to the tip of the screw.

特許第5703210号公報Japanese Patent No. 5703210

しかし、特許文献1に開示された鋼管杭継手のせん断キー構造は、ねじの先端にナットを取り付けるときに、ナットの基端側の座金がキー本体に形成された凹部の底部に当たるまで、キー本体の凹部でナットが押し込まれる。このため、特許文献1に開示された鋼管杭継手のせん断キー構造は、キー本体の凹部の底部にナットが押し込まれることで、キー本体がナットと窪みの底面とに挟み込まれて押圧されるものとなる。   However, in the shear key structure of the steel pipe pile joint disclosed in Patent Document 1, when the nut is attached to the tip of the screw, the key body is kept until the washer on the base end side of the nut hits the bottom of the recess formed in the key body. The nut is pushed into the recess. For this reason, the shear key structure of the steel pipe pile joint disclosed in Patent Document 1 is such that the key body is sandwiched and pressed between the nut and the bottom surface of the recess when the nut is pushed into the bottom of the recess of the key body. It becomes.

このとき、特許文献1に開示された鋼管杭継手のせん断キー構造は、正逆方向で交互に回転移動するキー本体から、キー本体の凹部に押し込まれたナットや、窪みに係止されたねじに、キー本体の回転力が伝達されるものとなる。このため、特許文献1に開示された鋼管杭継手のせん断キー構造は、キー本体から伝達された回転力により、ナットやねじが緩んで、キー本体が窪みから脱落するおそれがあるという問題点があった。   At this time, the shear key structure of the steel pipe pile joint disclosed in Patent Document 1 is a nut that is pushed into a recess of the key body from a key body that alternately rotates in forward and reverse directions, or a screw that is locked in a recess. In addition, the rotational force of the key body is transmitted. For this reason, the shear key structure of the steel pipe pile joint disclosed in Patent Document 1 has a problem that the nut or screw is loosened by the rotational force transmitted from the key body, and the key body may fall out of the recess. there were.

そこで、本発明は、上述した問題点に鑑みて案出されたものであって、その目的とするところは、キー部材の回転力を軸構造に伝達させないものとして、軸構造の軸部から拡径部のナットを緩めずに、第1鋼管杭と第2鋼管杭との相対回転をキー部材で抑止することのできる鋼管杭継手の回転抑止構造を提供することにある。   Accordingly, the present invention has been devised in view of the above-described problems, and the object of the present invention is to expand the shaft portion of the shaft structure so that the rotational force of the key member is not transmitted to the shaft structure. It is providing the rotation suppression structure of the steel pipe pile joint which can suppress the relative rotation of a 1st steel pipe pile and a 2nd steel pipe pile with a key member, without loosening a nut of a diameter part.

第1発明に係る鋼管杭継手の回転抑止構造は、複数の鋼管杭を連結して相対回転を抑止する鋼管杭継手の回転抑止構造であって、第1鋼管杭と第2鋼管杭とを管長方向で互いに連結する外嵌継手と内嵌継手とを備え、前記外嵌継手は、管長方向の先端側に設けられる外嵌先端部を有して、前記外嵌先端部の外面が切り欠かれることで、前記外嵌先端部に外嵌側キー溝部が形成されて、前記内嵌継手は、管長方向の基端側に設けられる内嵌基端部を有して、前記内嵌基端部の外面が切り欠かれることで、前記内嵌基端部に内嵌側キー溝部が形成されて、前記外嵌継手及び前記内嵌継手は、管長方向で互いに連結したときに、前記外嵌側キー溝部と前記内嵌側キー溝部とを管長方向に連続させたキー溝部が形成されて、前記外嵌側キー溝部から前記内嵌側キー溝部まで連続させて嵌め込まれるキー部材が、鋼管内側から鋼管外側まで連続する軸構造で前記キー溝部に固定されるものであり、前記軸構造は、前記内嵌継手の内嵌孔部及び前記キー部材のキー穴部に挿通される軸部と、鋼管内側で前記内嵌継手に係止される係止部と、鋼管外側で前記軸部よりも拡径した拡径部とを有して、前記拡径部と前記キー溝部の底面との間で前記キー部材が縁切りされた状態で管径方向に移動できるように、前記キー部材を貫通して前記キー溝部に取り付けられることを特徴とする。 The steel pipe pile joint rotation-inhibiting structure according to the first invention is a steel pipe pile joint rotation-inhibiting structure in which a plurality of steel pipe piles are connected to inhibit relative rotation. An outer fitting joint and an inner fitting joint that are connected to each other in a direction, and the outer fitting joint has an outer fitting tip portion provided on a distal end side in a pipe length direction, and an outer surface of the outer fitting tip portion is cut away. Thus, an outer fitting side key groove portion is formed at the outer fitting distal end portion, and the inner fitting joint has an inner fitting proximal end portion provided on the proximal end side in the tube length direction, and the inner fitting proximal end portion When the outer fitting side key groove is formed in the inner fitting base end portion, and the outer fitting joint and the inner fitting joint are connected to each other in the tube length direction, the outer fitting side is formed. A key groove portion in which the key groove portion and the inner fitting side key groove portion are continuous in the tube length direction is formed, and the front groove key is formed in front of the outer fitting side key groove portion. A key member that is continuously fitted to the inner fitting side key groove is fixed to the key groove with a shaft structure that continues from the inner side of the steel pipe to the outer side of the steel pipe, and the shaft structure is an inner fitting hole of the inner fitting joint. And a shaft portion inserted into the key hole portion of the key member, a locking portion locked to the internal fitting joint on the inner side of the steel pipe, and a diameter-expanded portion having a diameter larger than that of the shaft portion on the outer side of the steel pipe The key member penetrates the key member and is attached to the key groove portion so that the key member can be moved in a pipe diameter direction between the enlarged diameter portion and the bottom surface of the key groove portion. It is characterized by.

第2発明に係る鋼管杭継手の回転抑止構造は、第1発明において、前記軸構造は、螺旋状にネジ切りされたボルト軸を前記軸部、及び、前記ボルト軸よりも拡径したボルト頭を前記係止部として、前記拡径部として用いられるナットが前記軸部に螺合されることを特徴とする。   The rotation inhibition structure of the steel pipe pile joint according to the second invention is the bolt head according to the first invention, wherein the shaft structure has a bolt shaft that is screwed in a spiral shape with a diameter larger than that of the shaft portion and the bolt shaft. And the nut used as the enlarged diameter portion is screwed into the shaft portion.

第3発明に係る鋼管杭継手の回転抑止構造は、第1発明又は第2発明において、前記キー部材は、前記キー穴部よりも拡径させて、鋼管外側で前記拡径部が収容される外側ザグリ穴が形成されることを特徴とする。   According to a third aspect of the present invention, in the first or second invention, the key member has a diameter larger than that of the key hole, and the diameter-enlarged portion is accommodated outside the steel pipe. An outer counterbore hole is formed.

第4発明に係る鋼管杭継手の回転抑止構造は、第1発明〜第3発明の何れかにおいて、前記内嵌継手は、前記内嵌孔部よりも拡径させて、鋼管内側で前記係止部が収容される内側ザグリ穴が形成されることを特徴とする。   According to a fourth aspect of the present invention, there is provided the steel pipe pile joint rotation-inhibiting structure according to any one of the first to third aspects, wherein the inner fitting joint has a diameter larger than that of the inner fitting hole, and the locking is performed inside the steel pipe. An inner counterbore hole for receiving the portion is formed.

第5発明に係る鋼管杭継手の回転抑止構造は、第4発明において、前記軸構造は、前記軸部及び前記係止部が互いに異なる向きで螺旋状にネジ切りされて、前記拡径部として用いられるナットが前記軸部に螺合されるとともに、前記内嵌継手のネジ切りされた前記内側ザグリ穴に前記係止部が螺合されることを特徴とする。   According to a fifth aspect of the present invention, there is provided the structure for inhibiting rotation of a steel pipe pile joint according to the fourth aspect of the present invention, wherein the shaft structure is threaded in a spiral shape with the shaft portion and the locking portion being different from each other. A nut to be used is screwed into the shaft portion, and the locking portion is screwed into the threaded inner counterbore of the internal fitting joint.

第6発明に係る鋼管杭継手の回転抑止構造は、第1発明〜第5発明の何れかにおいて、前記第1鋼管杭及び前記第2鋼管杭は、管長方向で互いに連結した状態で、正回転又は逆回転に回転させながら、地盤内に埋め込まれるものとなることを特徴とする。   The steel pipe pile joint rotation-inhibiting structure according to a sixth aspect of the invention is any one of the first to fifth aspects of the invention, wherein the first steel pipe pile and the second steel pipe pile are connected in the pipe length direction in a normal direction. Alternatively, it is embedded in the ground while rotating in the reverse direction.

第1発明〜第6発明によれば、拡径部が締まる方向にも緩む方向にも移動し難く軸部に中間止めされて、キー部材と軸構造とが縁切りされることで、キー部材が交互に回動した場合でも、キー部材の回転力が軸構造に伝達されないものとなるため、軸構造の軸部から拡径部のナットが次第に緩むことを防止したものとなる。これにより、第1発明〜第6発明によれば、拡径部のナットを緩めずに、第1鋼管杭と第2鋼管杭との相対回転をキー部材で抑止することで、複数の鋼管杭を地盤内で確実に回転させることが可能となる。   According to the first to sixth aspects of the invention, the key member is made to be intermediately stopped by the shaft part and is difficult to move both in the tightening direction and in the loosening direction, and the key member and the shaft structure are cut off. Even in the case of alternately rotating, the rotational force of the key member is not transmitted to the shaft structure, so that the nut of the enlarged diameter portion is prevented from gradually loosening from the shaft portion of the shaft structure. Thereby, according to 1st invention-6th invention, without loosening the nut of an enlarged diameter part, by suppressing relative rotation with the 1st steel pipe pile and the 2nd steel pipe pile with a key member, a plurality of steel pipe piles Can be reliably rotated in the ground.

特に、第3発明によれば、キー部材の表面側に拡径部のナットが収容される外側ザグリ穴が形成されるため、キー部材の表面側よりも拡径部のナットを鋼管外側に突出させないものとなる。これにより、第3発明によれば、鋼管外側に拡径部のナットが突出しないため、鋼管杭を回転させるときの土砂からの抵抗が低減して、複数の鋼管杭の円滑な回転を実現することが可能となる。   In particular, according to the third invention, the outer counterbore hole for accommodating the nut of the enlarged diameter portion is formed on the surface side of the key member, so that the nut of the enlarged diameter portion protrudes outside the steel pipe from the surface side of the key member. It will not be allowed. Thereby, according to 3rd invention, since the nut of an enlarged diameter part does not protrude outside a steel pipe, the resistance from the earth and sand when rotating a steel pipe pile reduces, and smooth rotation of a plurality of steel pipe piles is realized. It becomes possible.

特に、第4発明によれば、内嵌継手の内面側に係止部が収容される内側ザグリ穴が形成されるため、内嵌継手の内面側よりも係止部のボルト頭を鋼管内側に突出させないものとなる。これにより、第4発明によれば、鋼管杭を回転させるときの土砂の抵抗が低減するとともに、鋼管杭の内部の土砂を排出するためのハンマグラブがボルト頭と接触することを回避して、ボルト頭の破損を防止することが可能となる。   In particular, according to the fourth aspect of the invention, since the inner counterbore hole in which the locking portion is accommodated is formed on the inner surface side of the internal fitting joint, the bolt head of the locking portion is located on the inner side of the steel pipe than the inner surface side of the internal fitting joint. It will not protrude. Thereby, according to 4th invention, while reducing the resistance of the earth and sand when rotating a steel pipe pile, it avoids that the hammer magnet for discharging the earth and sand inside a steel pipe pile contacts a bolt head, It becomes possible to prevent damage to the head.

特に、第5発明によれば、内嵌継手にネジ切りされた内側ザグリ穴が形成されるとともに、軸構造の係止部が螺旋状にネジ切りされることで、内嵌継手のネジ切りされた内側ザグリ穴に軸構造の係止部を螺合して固定することができる。これにより、第5発明によれば、軸構造の係止部を、内嵌継手の内面側に、仮溶接や接着等の仮止めをすることなく簡易に固定することが可能となる。   In particular, according to the fifth aspect of the present invention, the inner counterbore hole threaded in the inner fitting joint is formed, and the locking portion of the shaft structure is threaded in a spiral shape, so that the inner fitting joint is threaded. The locking portion of the shaft structure can be screwed and fixed to the inner counterbore hole. Thereby, according to 5th invention, it becomes possible to fix easily the latching | locking part of a shaft structure to the inner surface side of an internal fitting joint, without temporarily stopping, such as temporary welding and adhesion | attachment.

特に、第5発明によれば、軸構造の軸部及び係止部が互いに異なる向きで螺旋状にネジ切りされて、拡径部のナットを軸部に螺合するとき、軸構造の係止部が拡径部のナットと同じ方向に回転して内嵌継手のネジ切りされた内側ザグリ穴に締め込まれる。これにより、第5発明によれば、軸構造の係止部と拡径部とが同じ方向に共回りした場合であっても、軸構造の係止部が内嵌継手のネジ切りされた内側ザグリ穴に締め込まれるため、係止部の脱落を防止することが可能となる。   In particular, according to the fifth aspect, when the shaft portion and the locking portion of the shaft structure are threaded in a spiral shape in different directions, and the nut of the enlarged diameter portion is screwed to the shaft portion, the locking of the shaft structure The part rotates in the same direction as the nut of the enlarged diameter part and is tightened into the threaded inner counterbore hole of the fitting joint. Thereby, according to 5th invention, even if it is a case where the latching | locking part of a shaft structure and an enlarged diameter part rotate in the same direction, the latching | locking part of a shaft structure is the threaded inner side of an internal fitting joint. Since it is tightened into the counterbore hole, it is possible to prevent the locking portion from falling off.

本発明を適用した鋼管杭継手の回転抑止構造が用いられる複数の鋼管杭を示す斜視図である。It is a perspective view which shows the some steel pipe pile in which the rotation suppression structure of the steel pipe pile joint to which this invention is applied is used. 本発明を適用した鋼管杭継手の回転抑止構造のギア式継手の外嵌継手及び内嵌継手を示す斜視図である。It is a perspective view which shows the external fitting joint and internal fitting joint of the gear type joint of the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造の外嵌継手を示す正面図である。It is a front view which shows the external fitting joint of the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造の内嵌継手を示す正面図である。It is a front view which shows the internal fitting joint of the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造の外嵌継手及び内嵌継手の変形例を示す斜視図である。It is a perspective view which shows the modification of the external fitting joint of the rotation suppression structure of the steel pipe pile joint to which this invention is applied, and an internal fitting joint. 本発明を適用した鋼管杭継手の回転抑止構造で外嵌継手に内嵌継手を挿入する状態を示す斜視図である。It is a perspective view which shows the state which inserts an internal fitting joint in an external fitting joint by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で外嵌継手と内嵌継手とを相対回転させた状態を示す斜視図である。It is a perspective view which shows the state which carried out relative rotation of the external fitting joint and the internal fitting joint by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でキー溝部にキー部材を嵌め込んだ状態を示す斜視図である。It is a perspective view which shows the state which fitted the key member in the key groove part by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で外嵌継手と内嵌継手とを嵌合させた状態を示す拡大側面図である。It is an expanded side view which shows the state which made the external fitting joint and the internal fitting joint fit by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でキー溝部に取り付けられた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure attached to the key groove part by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で外嵌側キー溝部に配置された内嵌孔部を示す拡大側面図である。It is an expanded side view which shows the internal fitting hole part arrange | positioned in the external fitting side keyway part by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でボルト軸の端部側のみがネジ切りされた軸部を示す拡大側面図である。It is an expanded side view which shows the axial part by which only the edge part side of the bolt shaft was threaded by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で鋼管内側及び鋼管外側の各々にナットが用いられた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure where the nut was used for each of the steel pipe inner side and the steel pipe outer side by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で鋼管内側にナットが用いられた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure where the nut was used for the steel pipe inner side by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でキー部材に形成された外側ザグリ穴を示す拡大側面図である。It is an expanded side view which shows the outer counterbore hole formed in the key member by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で内嵌継手に形成された内側ザグリ穴を示す拡大側面図である。It is an expanded side view which shows the inside counterbore hole formed in the internal fitting joint by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で外側ザグリ穴及び内側ザグリ穴を示す拡大側面図である。It is an expanded side view which shows an outer counterbore hole and an inner counterbore hole in the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でネジ穴として形成された内側ザグリ穴を示す拡大側面図である。It is an expanded side view which shows the inside counterbore hole formed as a screw hole with the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で軸部及び係止部が互いに同じ向きでネジ切りされた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure where the shaft part and the latching | locking part were threaded in the mutually same direction by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でキー部材を押圧しないように取り付けられた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure attached so that a key member may not be pressed with the rotation suppression structure of the steel pipe pile joint to which this invention is applied. (a)は、本発明を適用した鋼管杭継手の回転抑止構造が用いられる複数の鋼管杭を正回転させた状態を示す正面図であり、(b)は、その逆回転させた状態を示す正面図である。(A) is a front view which shows the state which rotated forward the several steel pipe pile in which the rotation suppression structure of the steel pipe pile joint to which this invention was applied is used, (b) shows the state rotated reversely. It is a front view. 本発明を適用した鋼管杭継手の回転抑止構造のキー部材で外嵌継手と内嵌継手との相対回転を抑止した状態を示す拡大正面図である。It is an enlarged front view which shows the state which suppressed the relative rotation of an external fitting joint and an internal fitting joint with the key member of the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造でキー部材と軸構造とが縁切りされた状態を示す拡大正面図である。It is an enlarged front view which shows the state by which the key member and the shaft structure were edge-cut by the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 従来のせん断キー構造でキー部材と軸構造とが縁切りされていない状態を示す拡大正面図である。It is an enlarged front view which shows the state by which the key member and the shaft structure are not edge-cut by the conventional shear key structure. 本発明を適用した鋼管杭継手の回転抑止構造でボルト軸を貫通させて割りピンが設けられた軸構造を示す拡大側面図である。It is an expanded side view which shows the shaft structure where the split shaft was provided by penetrating the bolt shaft in the rotation inhibition structure of the steel pipe pile joint to which the present invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造で相対回転させずに直進して連結される外嵌継手と内嵌継手とを示す斜視図である。It is a perspective view which shows the external fitting joint and internal fitting joint which are linearly connected without rotating relatively with the rotation suppression structure of the steel pipe pile joint to which this invention is applied. 本発明を適用した鋼管杭継手の回転抑止構造のネジ式継手の外嵌継手及び内嵌継手を示す正面図である。It is a front view which shows the external fitting joint and internal fitting joint of the screw type joint of the rotation suppression structure of the steel pipe pile joint to which this invention is applied.

以下、本発明を適用した鋼管杭継手の回転抑止構造7を実施するための形態について、図面を参照しながら詳細に説明する。   Hereinafter, the form for implementing the rotation suppression structure 7 of the steel pipe pile joint to which this invention is applied is demonstrated in detail, referring drawings.

本発明を適用した鋼管杭継手の回転抑止構造7は、地盤上に構築される構造物の基礎杭等の継手として、図1に示すように、断面形状が略円形状等に形成された複数の鋼管杭を連結して、複数の鋼管杭の周方向Wの相対回転を抑止するために用いられる。   As shown in FIG. 1, the steel pipe pile joint rotation prevention structure 7 to which the present invention is applied has a plurality of cross-sectional shapes formed in a substantially circular shape or the like, as shown in FIG. The steel pipe piles are connected to each other to suppress relative rotation in the circumferential direction W of the plurality of steel pipe piles.

本発明を適用した鋼管杭継手の回転抑止構造7は、地盤内8の下方に埋め込まれる第1鋼管杭1と、地盤内8の上方に埋め込まれる第2鋼管杭2とが、複数の鋼管杭として管長方向Yで互いに連結されて、回転トルクを導入した回転圧入工法等により埋設される。   The steel pipe pile joint rotation-inhibiting structure 7 to which the present invention is applied includes a first steel pipe pile 1 embedded below the ground 8 and a second steel pipe pile 2 embedded above the ground 8. Are connected to each other in the pipe length direction Y and embedded by a rotary press-fitting method or the like that introduces rotational torque.

本発明を適用した鋼管杭継手の回転抑止構造7は、第1鋼管杭1の上端部と第2鋼管杭2の下端部とを管長方向Yで互いに連結する外嵌継手3と内嵌継手4とを備える。本発明を適用した鋼管杭継手の回転抑止構造7は、第1鋼管杭1の上端部に外嵌継手3を溶接等で取り付けるとともに、第2鋼管杭2の下端部に内嵌継手4を溶接等で取り付ける。   The steel pipe pile joint rotation suppression structure 7 to which the present invention is applied includes an outer fitting joint 3 and an inner fitting joint 4 that connect the upper end portion of the first steel pipe pile 1 and the lower end portion of the second steel pipe pile 2 in the pipe length direction Y. With. The steel pipe pile joint rotation-inhibiting structure 7 to which the present invention is applied attaches the outer fitting joint 3 to the upper end portion of the first steel pipe pile 1 by welding or the like, and welds the inner fitting joint 4 to the lower end portion of the second steel pipe pile 2. Install with etc.

外嵌継手3は、図2に示すように、管長方向Yの先端側に設けられる外嵌先端部34を有して、外嵌先端部34が第2鋼管杭2に向けて、管長方向Yに延びて形成される。外嵌継手3は、管長方向Yの基端側に設けられる外嵌基端部35を有して、外嵌基端部35の下端部が第1鋼管杭1の上端部に取り付けられる。   As shown in FIG. 2, the outer fitting joint 3 has an outer fitting tip 34 provided on the tip side in the pipe length direction Y, and the outer fitting tip 34 faces the second steel pipe pile 2, and the pipe length direction Y It is formed to extend. The outer fitting joint 3 has an outer fitting base end portion 35 provided on the base end side in the pipe length direction Y, and the lower end portion of the outer fitting base end portion 35 is attached to the upper end portion of the first steel pipe pile 1.

外嵌継手3は、外嵌先端部34から外嵌基端部35までの内周面に、管径方向Xで鋼管内側Aに突出して複数の外嵌山部31が形成される。外嵌継手3は、図3に示すように、外嵌山部31が内周面から突出することで、周方向Wで外嵌山部31に隣り合う外嵌溝部32と、管長方向Yの基端側で外嵌山部31に隣り合う外嵌谷部33とが形成される。   The external fitting joint 3 protrudes in the steel pipe inner side A in the pipe radial direction X on the inner peripheral surface from the external fitting distal end portion 34 to the external fitting proximal end portion 35, and a plurality of external fitting mountain portions 31 are formed. As shown in FIG. 3, the outer fitting joint 3 projects from the inner circumferential surface of the outer fitting mountain portion 31, so that the outer fitting groove portion 32 adjacent to the outer fitting mountain portion 31 in the circumferential direction W, and the pipe length direction Y An external fitting valley portion 33 adjacent to the external fitting mountain portion 31 is formed on the proximal end side.

外嵌継手3は、複数の外嵌山部31が管長方向Yで略一列に配置されて、管長方向Yで4段に亘って、複数の外嵌段部36が形成される。外嵌継手3は、各々の外嵌段部36において、外嵌山部31と外嵌溝部32とが、周方向Wで交互に形成されるとともに、外嵌山部31と外嵌谷部33とが、管長方向Yに隣り合って形成される。   In the outer fitting joint 3, a plurality of outer fitting mountain portions 31 are arranged in a line in the tube length direction Y, and a plurality of outer fitting step portions 36 are formed in four steps in the tube length direction Y. In the outer fitting joint 3, the outer fitting mountain portions 31 and the outer fitting groove portions 32 are alternately formed in the circumferential direction W in each outer fitting step portion 36, and the outer fitting mountain portion 31 and the outer fitting valley portion 33. Are formed adjacent to each other in the tube length direction Y.

外嵌継手3は、各々の外嵌段部36において、外嵌山部31の板厚よりも外嵌溝部32の板厚が小さく、外嵌山部31の板厚よりも外嵌谷部33の板厚が小さくなる。外嵌継手3は、管長方向Yに隣り合う外嵌段部36において、管長方向Yの先端側の外嵌谷部33の板厚よりも、管長方向Yの基端側の外嵌谷部33の板厚が大きいものとなる。   In each of the external fitting joints 3, the thickness of the external fitting groove 32 is smaller than the thickness of the external fitting mountain portion 31 and the external fitting valley portion 33 is smaller than the thickness of the external fitting mountain portion 31. The plate thickness becomes smaller. The external fitting joint 3 has an external fitting valley portion 33 on the proximal end side in the tube length direction Y rather than the plate thickness of the external fitting valley portion 33 on the distal end side in the tube length direction Y at the external fitting step portion 36 adjacent to the tube length direction Y. The plate thickness is large.

外嵌継手3は、外嵌先端部34の外面34aが切り欠かれることで、外嵌先端部34に外嵌側キー溝部71が形成される。外嵌継手3は、外嵌先端部34の外面34aから鋼管内側Aに貫通して、外嵌溝部32と略同一の周方向Wの幅で、外嵌側キー溝部71が形成される。外嵌継手3は、これに限らず、外嵌側キー溝部71の周方向Wの幅が、外嵌溝部32の周方向Wの幅よりも小さく、又は、大きくてもよい。なお、外嵌側キー溝部71の周方向Wの幅が、外嵌溝部32の周方向Wの幅よりも大きい場合は、周方向Wで外嵌溝部32から外嵌山部31まで跨った位置に外嵌側キー溝部71が形成される。外嵌側キー溝部71は、外嵌溝部32と略同一の周方向Wの位置に形成されるが、これに限らず、外嵌山部31と略同一の位置に形成されてもよい。   In the outer fitting joint 3, an outer fitting side key groove portion 71 is formed in the outer fitting tip portion 34 by cutting out the outer surface 34 a of the outer fitting tip portion 34. The outer fitting joint 3 penetrates the steel pipe inner side A from the outer surface 34a of the outer fitting distal end portion 34, and an outer fitting side key groove portion 71 is formed with a width in the circumferential direction W substantially the same as the outer fitting groove portion 32. The outer fitting joint 3 is not limited to this, and the width in the circumferential direction W of the outer fitting side key groove portion 71 may be smaller or larger than the width in the circumferential direction W of the outer fitting groove portion 32. In addition, when the width in the circumferential direction W of the outer fitting side key groove portion 71 is larger than the width in the circumferential direction W of the outer fitting groove portion 32, the position straddling from the outer fitting groove portion 32 to the outer fitting mountain portion 31 in the circumferential direction W. An outer fitting side key groove portion 71 is formed in the inner wall. The outer fitting side key groove portion 71 is formed at substantially the same position in the circumferential direction W as the outer fitting groove portion 32, but is not limited thereto, and may be formed at substantially the same position as the outer fitting mountain portion 31.

外嵌継手3は、周方向Wで外嵌山部31と交互に形成された複数の外嵌溝部32のうち、一部の外嵌溝部32の先端側のみが切り欠かれて、複数の外嵌溝部32の一部に外嵌側キー溝部71が形成される。また、外嵌継手3は、図5(a)に示すように、周方向Wで外嵌山部31と交互に形成された複数の外嵌溝部32で、全部の外嵌溝部32の先端側が切り欠かれて、複数の外嵌溝部32の全部に外嵌側キー溝部71が形成されてもよい。   The outer fitting joint 3 has a plurality of outer fitting groove portions 32 formed alternately with the outer fitting mountain portions 31 in the circumferential direction W, and only the distal end side of some of the outer fitting groove portions 32 is notched, An external fitting side key groove portion 71 is formed in a part of the fitting groove portion 32. Further, as shown in FIG. 5A, the external fitting joint 3 includes a plurality of external fitting groove portions 32 that are alternately formed with the external fitting mountain portions 31 in the circumferential direction W. The outer fitting side key groove portion 71 may be formed in all of the plurality of outer fitting groove portions 32 by being cut out.

内嵌継手4は、図2に示すように、管長方向Yの先端側に設けられる内嵌先端部44を有して、内嵌先端部44が第1鋼管杭1に向けて、管長方向Yに延びて形成される。内嵌継手4は、管長方向Yの基端側に設けられる内嵌基端部45を有して、内嵌基端部45の上端部が第2鋼管杭2の下端部に取り付けられる。   As shown in FIG. 2, the internally fitted joint 4 has an internally fitted distal end portion 44 provided on the distal end side in the tube length direction Y, and the internally fitted distal end portion 44 faces the first steel pipe pile 1 in the tube length direction Y. It is formed to extend. The internal fitting joint 4 has an internal fitting base end portion 45 provided on the base end side in the pipe length direction Y, and the upper end portion of the internal fitting base end portion 45 is attached to the lower end portion of the second steel pipe pile 2.

内嵌継手4は、内嵌先端部44から内嵌基端部45までの外周面に、管径方向Xで鋼管外側Bに突出して複数の内嵌山部41が形成される。内嵌継手4は、図4に示すように、内嵌山部41が外周面から突出することで、周方向Wで内嵌山部41に隣り合う内嵌溝部42と、管長方向Yの基端側で内嵌山部41に隣り合う内嵌谷部43とが形成される。   The inner fitting joint 4 protrudes toward the outer side B of the steel pipe in the pipe radial direction X on the outer peripheral surface from the inner fitting tip portion 44 to the inner fitting base end portion 45 to form a plurality of inner fitting mountain portions 41. As shown in FIG. 4, the internally fitting joint 4 includes an internally fitting groove portion 42 that is adjacent to the internally fitting mountain portion 41 in the circumferential direction W and a base in the tube length direction Y because the internally fitting mountain portion 41 protrudes from the outer peripheral surface. An internal fitting valley portion 43 adjacent to the internal fitting mountain portion 41 is formed on the end side.

内嵌継手4は、複数の内嵌山部41が管長方向Yで略一列に配置されて、管長方向Yで4段に亘って、複数の内嵌段部46が形成される。内嵌継手4は、各々の内嵌段部46において、内嵌山部41と内嵌溝部42とが、周方向Wで交互に形成されるとともに、内嵌山部41と内嵌谷部43とが、管長方向Yに隣り合って形成される。   In the internally fitting joint 4, a plurality of internally fitting mountain parts 41 are arranged in a line in the tube length direction Y, and a plurality of internally fitted step parts 46 are formed in four stages in the tube length direction Y. In the inner fitting joint 4, the inner fitting mountain portions 41 and the inner fitting groove portions 42 are alternately formed in the circumferential direction W in each inner fitting step portion 46, and the inner fitting mountain portion 41 and the inner fitting valley portion 43. Are formed adjacent to each other in the tube length direction Y.

内嵌継手4は、各々の内嵌段部46において、内嵌山部41の板厚よりも内嵌溝部42の板厚が小さく、内嵌山部41の板厚よりも内嵌谷部43の板厚が小さくなる。内嵌継手4は、管長方向Yに隣り合う内嵌段部46において、管長方向Yの先端側の内嵌谷部43の板厚よりも、管長方向Yの基端側の内嵌谷部43の板厚が大きいものとなる。   In the inner fitting joint 4, the thickness of the inner fitting groove portion 42 is smaller than the thickness of the inner fitting mountain portion 41 in each inner fitting step portion 46, and the inner fitting valley portion 43 is smaller than the thickness of the inner fitting mountain portion 41. The plate thickness becomes smaller. The internal fitting joint 4 includes an internal fitting valley portion 43 on the proximal end side in the tube length direction Y with respect to the thickness of the internal fitting valley portion 43 on the distal end side in the tube length direction Y at the internal fitting step portion 46 adjacent in the tube length direction Y. The plate thickness is large.

内嵌継手4は、内嵌基端部45の外面45aが切り欠かれることで、内嵌基端部45に内嵌側キー溝部72が形成される。内嵌継手4は、内嵌基端部45の外面45aから鋼管内側Aに所定の深さで切り欠いて、内嵌溝部42と略同一の周方向Wの幅で、内嵌側キー溝部72が形成される。内嵌継手4は、これに限らず、内嵌側キー溝部72の周方向Wの幅が、内嵌溝部42の周方向Wの幅よりも小さく、又は、大きくてもよい。なお、内嵌側キー溝部72の周方向Wの幅が、内嵌溝部42の周方向Wの幅よりも大きい場合は、周方向Wで内嵌溝部42から内嵌山部41まで跨った位置に内嵌側キー溝部72が形成される。内嵌側キー溝部72は、内嵌溝部42と略同一の周方向Wの位置に形成されるが、これに限らず、内嵌山部41と略同一の位置に形成されてもよい。   In the inner fitting joint 4, an inner fitting side key groove portion 72 is formed in the inner fitting base end portion 45 by cutting out the outer surface 45 a of the inner fitting base end portion 45. The inner fitting joint 4 is notched at a predetermined depth from the outer surface 45a of the inner fitting base end portion 45 to the steel pipe inner side A, and has a width in the circumferential direction W substantially the same as the inner fitting groove portion 42, and has an inner fitting side key groove portion 72. Is formed. The internal fitting 4 is not limited to this, and the width in the circumferential direction W of the internal fitting side key groove 72 may be smaller or larger than the width in the circumferential direction W of the internal fitting groove 42. In addition, when the width in the circumferential direction W of the inner fitting side key groove portion 72 is larger than the width in the circumferential direction W of the inner fitting groove portion 42, a position straddling from the inner fitting groove portion 42 to the inner fitting mountain portion 41 in the circumferential direction W. The inner fitting side key groove portion 72 is formed in the inner wall. The inner fitting side key groove portion 72 is formed at a position in the circumferential direction W substantially the same as the inner fitting groove portion 42, but is not limited thereto, and may be formed at a position substantially the same as the inner fitting mountain portion 41.

内嵌継手4は、周方向Wで内嵌山部41と交互に形成された複数の内嵌溝部42のうち、一部の内嵌溝部42の基端側のみが切り欠かれて、複数の内嵌溝部42の一部に内嵌側キー溝部72が形成される。また、内嵌継手4は、図5(b)に示すように、周方向Wで内嵌山部41と交互に形成された複数の内嵌溝部42で、全部の内嵌溝部42の基端側が切り欠かれて、複数の内嵌溝部42の全部に内嵌側キー溝部72が形成されてもよい。   Of the plurality of inner fitting groove portions 42 formed alternately with the inner fitting mountain portions 41 in the circumferential direction W, the inner fitting joint 4 is cut out only at the base end side of some of the inner fitting groove portions 42. An inner fitting side key groove portion 72 is formed in a part of the inner fitting groove portion 42. Further, as shown in FIG. 5 (b), the inner fitting joint 4 is a plurality of inner fitting groove portions 42 formed alternately with the inner fitting mountain portions 41 in the circumferential direction W, and the base ends of all the inner fitting groove portions 42. The inner fitting side key groove portion 72 may be formed in all of the plurality of inner fitting groove portions 42 by notching the side.

外嵌継手3及び内嵌継手4は、図6に示すように、最初に、管長方向Yで第1鋼管杭1と第2鋼管杭2とを互いに連結させるときに、第2鋼管杭2に取り付けられた内嵌継手4が、第1鋼管杭1に取り付けられた外嵌継手3に挿入されるものとなる。   As shown in FIG. 6, the outer fitting joint 3 and the inner fitting joint 4 are formed on the second steel pipe pile 2 when the first steel pipe pile 1 and the second steel pipe pile 2 are first connected in the pipe length direction Y. The attached internal fitting 4 is inserted into the external fitting 3 attached to the first steel pipe pile 1.

外嵌継手3及び内嵌継手4は、外嵌継手3に内嵌継手4を挿入するときに、各々の外嵌段部36において、外嵌山部31の管径方向Xの高さが内嵌溝部42の管径方向Xの深さ以下とされて、外嵌山部31が内嵌溝部42を通過する。また、外嵌継手3及び内嵌継手4は、各々の内嵌段部46において、内嵌山部41の管径方向Xの高さが外嵌溝部32の管径方向Xの深さ以下とされて、内嵌山部41が外嵌溝部32を通過する。   When the inner fitting joint 4 is inserted into the outer fitting joint 3, the outer fitting joint 3 and the inner fitting joint 4 have the height in the pipe radial direction X of the outer fitting mountain portion 31 at each outer fitting step portion 36. The outer fitting mountain portion 31 passes through the inner fitting groove portion 42 with the depth being equal to or less than the depth of the fitting groove portion 42 in the tube radial direction X. Further, the outer fitting joint 3 and the inner fitting joint 4 are such that, in each inner fitting step portion 46, the height of the inner fitting mountain portion 41 in the pipe radial direction X is equal to or less than the depth of the outer fitting groove portion 32 in the pipe radial direction X. Then, the inner fitting mountain portion 41 passes through the outer fitting groove portion 32.

外嵌継手3及び内嵌継手4は、次に、内嵌継手4を外嵌継手3に挿入したまま、図7に示すように、第1鋼管杭1と第2鋼管杭2とを相対回転させることで、外嵌継手3と内嵌継手4とが周方向Wに相対回転して、管長方向Yで互いに嵌合されるものとなる。   Next, the outer fitting joint 3 and the inner fitting joint 4 rotate the first steel pipe pile 1 and the second steel pipe pile 2 relative to each other as shown in FIG. 7 while the inner fitting joint 4 is inserted into the outer fitting joint 3. By doing so, the outer fitting joint 3 and the inner fitting joint 4 are rotated relative to each other in the circumferential direction W and are fitted to each other in the pipe length direction Y.

外嵌継手3及び内嵌継手4は、外嵌継手3と内嵌継手4とが相対回転するときに、各々の外嵌段部36において、内嵌谷部43の管径方向Xの深さが外嵌山部31の管径方向Xの高さ以上とされて、外嵌山部31が内嵌谷部43に嵌合される。また、外嵌継手3及び内嵌継手4は、各々の内嵌段部46において、外嵌谷部33の管径方向Xの深さが内嵌山部41の管径方向Xの高さ以上とされて、内嵌山部41が外嵌谷部33に嵌合される。   When the outer fitting joint 3 and the inner fitting joint 4 rotate relative to each other, the outer fitting joint 3 and the inner fitting joint 4 have a depth in the pipe radial direction X of the inner fitting valley portion 43 in each outer fitting step portion 36. Is not less than the height of the outer fitting mountain portion 31 in the tube radial direction X, and the outer fitting mountain portion 31 is fitted into the inner fitting valley portion 43. Further, in the external fitting joint 3 and the internal fitting joint 4, in each internal fitting step portion 46, the depth of the external fitting valley portion 33 in the pipe radial direction X is equal to or greater than the height of the internal fitting mountain portion 41 in the pipe radial direction X. Thus, the inner fitting mountain portion 41 is fitted into the outer fitting valley portion 33.

外嵌継手3及び内嵌継手4は、外嵌側キー溝部71と内嵌側キー溝部72とが、互いに略同一の周方向Wの位置に形成される。このため、外嵌継手3及び内嵌継手4は、周方向Wで相対回転させて、管長方向Yで互いに連結したときに、外嵌側キー溝部71と内嵌側キー溝部72とを管長方向Yに連続させたキー溝部70が形成される。   In the outer fitting joint 3 and the inner fitting joint 4, the outer fitting side key groove portion 71 and the inner fitting side key groove portion 72 are formed at substantially the same position in the circumferential direction W. For this reason, when the outer fitting joint 3 and the inner fitting joint 4 are relatively rotated in the circumferential direction W and connected to each other in the tube length direction Y, the outer fitting side key groove portion 71 and the inner fitting side key groove portion 72 are connected in the tube length direction. A key groove 70 that is continuous with Y is formed.

外嵌継手3及び内嵌継手4は、図8に示すように、例えば、キー溝部70が略矩形状に形成されて、キー溝部70よりも外形寸法を小さくしたキー部材5が、キー溝部70に嵌め込まれる。外嵌継手3及び内嵌継手4は、鋼製等のキー部材5がキー溝部70に嵌め込まれて、管長方向Yで外嵌側キー溝部71から内嵌側キー溝部72まで連続させてキー部材5が架設されるものとなる。   As shown in FIG. 8, the outer fitting joint 3 and the inner fitting joint 4 include, for example, a key member 5 in which a key groove portion 70 is formed in a substantially rectangular shape and has an outer dimension smaller than that of the key groove portion 70. It is inserted in. The key fitting 5 made of steel or the like is fitted in the key groove portion 70 in the outer fitting joint 3 and the inner fitting joint 4, and is continuously extended from the outer fitting side key groove portion 71 to the inner fitting side key groove portion 72 in the pipe length direction Y. 5 will be installed.

外嵌継手3及び内嵌継手4は、図9に示すように、各々の外嵌段部36及び内嵌段部46において、内嵌山部41の管長方向Yの長さを外嵌谷部33の管長方向Yの長さ以下として、外嵌山部31の管長方向Yの長さを内嵌谷部43の管長方向Yの長さ以下とする。このとき、外嵌継手3及び内嵌継手4は、各々の外嵌段部36及び内嵌段部46において、外嵌山部31と内嵌山部41とが管長方向Yで互いに係止されるものとなる。   As shown in FIG. 9, the outer fitting joint 3 and the inner fitting joint 4 are configured such that the length of the inner fitting mountain portion 41 in the pipe length direction Y is set to the outer fitting valley portion in each of the outer fitting step portion 36 and the inner fitting step portion 46. The length in the tube length direction Y of the outer fitting mountain portion 31 is set to be equal to or less than the length in the tube length direction Y of the inner fitting valley portion 43 as the length of 33 in the tube length direction Y or less. At this time, in the outer fitting joint 3 and the inner fitting joint 4, the outer fitting mountain portion 31 and the inner fitting mountain portion 41 are locked to each other in the pipe length direction Y in each of the outer fitting step portion 36 and the inner fitting step portion 46. Will be.

外嵌継手3及び内嵌継手4は、外嵌継手3の先端側で外嵌先端部34と内嵌基端部45とが互いに当接されて、内嵌継手4の先端側で内嵌先端部44と外嵌基端部35とが互いに当接される。外嵌継手3及び内嵌継手4は、これに限らず、外嵌継手3の先端側で外嵌先端部34と内嵌基端部45とが互いに離間するものであってもよく、また、内嵌継手4の先端側で内嵌先端部44と外嵌基端部35とが互いに離間するものであってもよい。   The outer fitting joint 3 and the inner fitting joint 4 are configured such that the outer fitting distal end portion 34 and the inner fitting proximal end portion 45 are brought into contact with each other on the distal end side of the outer fitting joint 3, and the inner fitting distal end is located on the distal end side of the inner fitting joint 4. The portion 44 and the outer fitting base end portion 35 are in contact with each other. The outer fitting joint 3 and the inner fitting joint 4 are not limited to this, and the outer fitting distal end portion 34 and the inner fitting proximal end portion 45 may be separated from each other on the distal end side of the outer fitting joint 3, The inner fitting distal end portion 44 and the outer fitting proximal end portion 35 may be separated from each other on the distal end side of the inner fitting joint 4.

外嵌継手3及び内嵌継手4は、鋼管内側Aから鋼管外側Bまで連続させたボルトナット等の軸構造6で、キー部材5がキー溝部70に嵌め込まれて固定される。外嵌継手3及び内嵌継手4は、図10に示すように、管径方向Xに穿孔した内嵌孔部40が内嵌継手4に形成されて、内嵌孔部40が内嵌側キー溝部72に配置される。外嵌継手3及び内嵌継手4は、これに限らず、図11に示すように、外嵌側キー溝部71が外嵌先端部34の外面34aから鋼管内側Aに貫通していない場合等には、管径方向Xに穿孔した外嵌孔部30が外嵌継手3に形成されて、内嵌孔部40が外嵌側キー溝部71に配置されてもよい。   The outer fitting joint 3 and the inner fitting joint 4 are shaft structures 6 such as bolts and nuts continuous from the steel pipe inner side A to the steel pipe outer side B, and the key member 5 is fitted into the key groove portion 70 and fixed. As shown in FIG. 10, the outer fitting joint 3 and the inner fitting joint 4 are formed with an inner fitting hole portion 40 formed in the pipe radial direction X in the inner fitting joint 4, and the inner fitting hole portion 40 is an inner fitting side key. Arranged in the groove 72. The outer fitting joint 3 and the inner fitting joint 4 are not limited to this, and as shown in FIG. 11, when the outer fitting-side key groove portion 71 does not penetrate the steel pipe inner side A from the outer surface 34 a of the outer fitting tip 34. The outer fitting hole 30 drilled in the tube diameter direction X may be formed in the outer fitting joint 3, and the inner fitting hole 40 may be arranged in the outer fitting side key groove 71.

軸構造6は、キー部材5を管径方向Xに貫通するキー穴部50に取り付けられて、キー部材5がキー溝部70に固定されるものとなる。軸構造6は、内嵌継手4の内嵌孔部40及びキー部材5のキー穴部50に挿通される軸部61と、鋼管内側Aで内嵌継手4に係止される係止部62と、鋼管外側Bで軸部61よりも拡径した拡径部63とを有する。   The shaft structure 6 is attached to the key hole portion 50 that penetrates the key member 5 in the tube diameter direction X, and the key member 5 is fixed to the key groove portion 70. The shaft structure 6 includes a shaft portion 61 inserted through the inner fitting hole portion 40 of the inner fitting joint 4 and the key hole portion 50 of the key member 5, and a locking portion 62 that is engaged with the inner fitting joint 4 at the steel pipe inner side A. And a diameter-expanded portion 63 having a diameter larger than that of the shaft portion 61 at the steel pipe outer side B.

軸構造6は、例えば、軸部61及び係止部62として、ボルトが用いられるとともに、拡径部63として、ナットが用いられる。軸構造6は、螺旋状にネジ切りされたボルト軸を軸部61、及び、ボルト軸よりも拡径したボルト頭を係止部62として、拡径部63として用いられるナットが軸部61に螺合されるものとなる。   In the shaft structure 6, for example, a bolt is used as the shaft portion 61 and the locking portion 62, and a nut is used as the diameter-expanded portion 63. In the shaft structure 6, a bolt shaft screwed in a spiral shape is used as a shaft portion 61, a bolt head having a diameter larger than that of the bolt shaft is used as a locking portion 62, and a nut used as the enlarged diameter portion 63 is provided in the shaft portion 61. It will be screwed together.

軸構造6は、軸部61となるボルト軸の軸方向の全長に亘って螺旋状にネジ切りされるものに限らず、図12に示すように、軸部61となるボルト軸の軸方向で、キー部材5のキー穴部50から突出させた端部側61aのみがネジ切りされて、内嵌継手4の内嵌孔部40及びキー部材5のキー穴部50に挿通される中間側61bがネジ切りされることなく略平滑面状に形成されてもよい。   The shaft structure 6 is not limited to a screw threaded helically over the entire axial length of the bolt shaft that becomes the shaft portion 61, but as shown in FIG. 12, in the axial direction of the bolt shaft that becomes the shaft portion 61. Only the end 61a that protrudes from the key hole 50 of the key member 5 is threaded, and the intermediate side 61b is inserted through the inner fitting hole 40 of the inner fitting 4 and the key hole 50 of the key member 5. May be formed into a substantially smooth surface without being threaded.

軸構造6は、ボルト頭が係止部62とされるものに限らず、図13に示すように、軸部61となるボルト軸の軸方向で、鋼管内側A及び鋼管外側Bの各々にナットが用いられてもよい。このとき、軸構造6は、鋼管外側Bのナットが拡径部63、鋼管内側Aのナットが係止部62として用いられて、例えば、軸部61となるボルト軸の軸方向で、内嵌継手4の内嵌孔部40及びキー部材5のキー穴部50から突出させた端部側61aのみがネジ切りされて、内嵌継手4の内嵌孔部40及びキー部材5のキー穴部50に挿通される中間側61bがネジ切りされることなく略平滑面状に形成される。また、軸構造6は、図14に示すように、鋼管外側Bに配置されたボルト頭が拡径部63、鋼管内側Aに配置されたナットが係止部62として用いられてもよい。   The shaft structure 6 is not limited to the bolt head being the locking portion 62, and as shown in FIG. 13, a nut is provided on each of the steel pipe inner side A and the steel pipe outer side B in the axial direction of the bolt shaft that becomes the shaft portion 61. May be used. At this time, the shaft structure 6 is configured such that the nut on the outer side B of the steel pipe is used as the enlarged diameter part 63 and the nut on the inner side A of the steel pipe is used as the locking part 62. Only the end portion 61 a protruding from the inner fitting hole 40 of the joint 4 and the key hole 50 of the key member 5 is threaded, and the inner fitting hole 40 of the inner fitting 4 and the key hole portion of the key member 5 are threaded. The intermediate side 61b inserted through 50 is formed into a substantially smooth surface without being threaded. In the shaft structure 6, as shown in FIG. 14, a bolt head arranged on the steel pipe outer side B may be used as the diameter-expanded portion 63, and a nut arranged on the steel pipe inner side A may be used as the locking portion 62.

軸構造6は、図12に示すように、キー部材5の表面側5aよりも鋼管外側Bに突出して拡径部63のナットが配置されて、また、内嵌継手4の内面側4aよりも鋼管内側Aに突出して係止部62のボルト頭が配置される。このとき、キー部材5は、キー穴部50の内面がネジ切りされることなく略平滑面状に形成される。キー部材5は、略矩形状、略円形状、略楕円形状、略菱形状、略六角形状又は面取りした略矩形状等に形成される。   As shown in FIG. 12, the shaft structure 6 has a nut of the enlarged diameter portion 63 protruding from the steel pipe outer side B than the surface side 5 a of the key member 5, and more than the inner surface side 4 a of the internal fitting 4. A bolt head of the locking portion 62 is disposed so as to protrude to the inside A of the steel pipe. At this time, the key member 5 is formed in a substantially smooth surface shape without the inner surface of the key hole portion 50 being threaded. The key member 5 is formed in a substantially rectangular shape, a substantially circular shape, a substantially oval shape, a substantially rhombus shape, a substantially hexagonal shape, a chamfered substantially rectangular shape, or the like.

キー部材5は、図15に示すように、軸部61が挿通されるキー穴部50よりも、キー部材5の表面側5aが拡径させて切り欠かれて、鋼管外側Bで拡径部63のナットが収容される外側ザグリ穴57が形成されてもよい。このとき、軸構造6は、キー部材5の外側ザグリ穴57に拡径部63のナットが収容されて、キー部材5の表面側5aよりも拡径部63のナットを鋼管外側Bに突出させないものとなる。   As shown in FIG. 15, the key member 5 is cut away by expanding the surface side 5 a of the key member 5 relative to the key hole portion 50 through which the shaft portion 61 is inserted, and the diameter increasing portion is formed on the outer side B of the steel pipe. An outer counterbore hole 57 for accommodating 63 nuts may be formed. At this time, in the shaft structure 6, the nut of the enlarged diameter portion 63 is accommodated in the outer counterbore hole 57 of the key member 5, and the nut of the enlarged diameter portion 63 does not protrude beyond the steel pipe outer side B than the surface side 5 a of the key member 5. It will be a thing.

内嵌継手4は、図16に示すように、軸部61が挿通される内嵌孔部40よりも、内嵌継手4の内面側4aが拡径させて切り欠かれて、鋼管内側Aで係止部62のボルト頭が収容される内側ザグリ穴47が形成されてもよい。このとき、軸構造6は、内嵌継手4の内側ザグリ穴47に係止部62のボルト頭が収容されて、内嵌継手4の内面側4aよりも係止部62のボルト頭を鋼管内側Aに突出させないものとなる。   As shown in FIG. 16, the inner fitting 4 is cut out by expanding the inner surface side 4 a of the inner fitting 4 than the inner fitting hole 40 through which the shaft portion 61 is inserted. An inner counterbore hole 47 in which the bolt head of the locking portion 62 is accommodated may be formed. At this time, in the shaft structure 6, the bolt head of the locking portion 62 is accommodated in the inner counterbore hole 47 of the internally fitting joint 4, and the bolt head of the locking portion 62 is placed inside the steel pipe rather than the inner surface side 4 a of the internally fitting joint 4. A will not project.

内嵌継手4及びキー部材5は、特に、図17に示すように、鋼管外側Bの外側ザグリ穴57と鋼管内側Aの内側ザグリ穴47とがともに形成されることが望ましい。軸構造6は、軸部61となるボルト軸よりも拡径したボルト頭が略六角形状に形成された六角ボルト又は六角穴付きボルト等が用いられる。   In particular, as shown in FIG. 17, the inner fitting 4 and the key member 5 are preferably formed with both an outer counterbore hole 57 on the outer side B of the steel pipe and an inner counterbore hole 47 on the inner side A of the steel pipe. For the shaft structure 6, a hexagonal bolt or a hexagon socket head bolt in which a bolt head whose diameter is larger than that of the bolt shaft serving as the shaft portion 61 is formed in a substantially hexagonal shape is used.

軸構造6は、図18に示すように、ボルト頭が略円形状に形成されて、略円形状に形成されたボルト頭の外周を螺旋状にネジ切りした係止部62が用いられてもよい。このとき、内嵌継手4は、内側ザグリ穴47の内面がネジ切りされて、螺旋状のネジ穴48として内側ザグリ穴47が形成される。   As shown in FIG. 18, the shaft structure 6 has a bolt head formed in a substantially circular shape, and a locking portion 62 in which the outer periphery of the bolt head formed in a substantially circular shape is threaded helically is used. Good. At this time, the inner face of the inner fitting joint 4 is threaded to form the inner counterbore 47 as a spiral screw hole 48.

軸構造6は、軸部61及び係止部62が互いに異なる向きで螺旋状にネジ切りされて、例えば、軸部61を右回りの螺旋状のネジ切り、係止部62を左回りの螺旋状のネジ切りとする。このとき、軸構造6は、係止部62が鋼管内側Aからネジ穴48に左周りで螺合されるとともに、拡径部63のナットが鋼管外側Bから軸部61に右周りで螺合されて、内嵌継手4の内面側4aよりも係止部62を鋼管内側Aに突出させずに、係止部62がネジ穴48で内嵌継手4に係止される。   In the shaft structure 6, the shaft portion 61 and the locking portion 62 are threaded in a spiral shape in different directions. For example, the shaft portion 61 is turned clockwise and the locking portion 62 is turned counterclockwise. Threaded. At this time, in the shaft structure 6, the locking portion 62 is screwed in the counterclockwise direction from the steel pipe inner side A to the screw hole 48, and the nut of the enlarged diameter portion 63 is screwed in the clockwise direction from the steel pipe outer side B to the shaft portion 61. Thus, the locking portion 62 is locked to the inner fitting joint 4 through the screw hole 48 without causing the locking portion 62 to protrude toward the steel pipe inner side A from the inner surface side 4 a of the inner fitting joint 4.

軸構造6は、図19に示すように、軸部61よりも係止部62を拡径させないで、軸部61と略同一の外径で係止部62が形成されてもよい。このとき、内嵌継手4は、内嵌孔部40の内面がネジ切りされて、螺旋状のネジ穴48が形成される。軸構造6は、軸部61及び係止部62が互いに同じ向きで螺旋状にネジ切りされる。   As shown in FIG. 19, the shaft structure 6 may be formed with a locking portion 62 having an outer diameter substantially the same as that of the shaft portion 61 without increasing the diameter of the locking portion 62 as compared with the shaft portion 61. At this time, in the internally fitting joint 4, the inner surface of the internally fitting hole portion 40 is threaded to form a helical screw hole 48. In the shaft structure 6, the shaft portion 61 and the locking portion 62 are threaded in a spiral shape in the same direction.

軸構造6は、鋼管外側Bから係止部62をネジ穴48に右周りで螺合した後、拡径部63のナットを鋼管外側Bから軸部61に右周りで螺合して、内嵌継手4の内面側4aよりも係止部62を鋼管内側Aに突出させずに、係止部62がネジ穴48で内嵌継手4に係止される。このとき、軸構造6は、軸部61となるボルト軸の軸方向で、キー部材5のキー穴部50から突出させた端部側61aがネジ切りされて、内嵌継手4の内嵌孔部40からキー部材5のキー穴部50に亘った中間側61bがネジ切りされることなく略平滑面状に形成されることで、拡径部63のナットが締まる方向に移動し難く固定される。   The shaft structure 6 is formed by screwing the locking portion 62 from the outer side B of the steel pipe clockwise into the screw hole 48 and then screwing the nut of the enlarged diameter portion 63 from the outer side B of the steel pipe clockwise to the inner side of the shaft 61. The locking portion 62 is locked to the internally fitting joint 4 through the screw hole 48 without causing the locking portion 62 to protrude toward the steel pipe inner side A from the inner surface side 4 a of the fitting joint 4. At this time, in the shaft structure 6, the end portion 61 a that protrudes from the key hole portion 50 of the key member 5 is threaded in the axial direction of the bolt shaft that becomes the shaft portion 61, and the inner fitting hole of the inner fitting joint 4 is threaded. The intermediate side 61b extending from the portion 40 to the key hole portion 50 of the key member 5 is formed in a substantially smooth surface without being threaded, so that the nut of the enlarged diameter portion 63 is fixed so as not to move in the tightening direction. The

軸構造6は、図10〜図19に示す何れの実施形態においても、例えば、拡径部63のナットに緩み止めナットが用いられる。緩み止めナットは、ナットの上面にフリクションリングを一体化させて緩み止め機能を付与したものであり、軸部61のボルト軸に拡径部63のナットを螺合したときに、拡径部63のナットが締まる方向にも緩む方向にも移動し難く固定されることで、拡径部63のナットが軸部61のボルト軸に中間止めされて、緩み難く脱落し難いものとなる。緩み止めナットは、ナットを二重にして偏心させて組み合わせたナットや、ナットを二重にして溝によって組み合わせたナット、又は、ネジ山の山部にさらに凹凸を付けてナットと競ること等により、緩み止め機能が付与されるものでもよい。また、ナットを取り付けた後に経時性固化剤を塗布することにより、緩み止め機能が付与されるものでもよい。   In any of the embodiments shown in FIGS. 10 to 19, the shaft structure 6 uses, for example, a locking nut as the nut of the enlarged diameter portion 63. The locking nut is obtained by integrating a friction ring on the upper surface of the nut to provide a locking function, and when the nut of the expanded diameter portion 63 is screwed onto the bolt shaft of the shaft portion 61, the expanded diameter portion 63 is provided. The nut of the enlarged diameter portion 63 is fixed to the bolt shaft of the shaft portion 61 in the middle so that it is difficult to move in both the tightening direction and the loosening direction. Locking nuts are nuts that are combined by eccentrically doubling nuts, nuts that are combined by doubling nuts by grooves, or competing with nuts by adding unevenness to the thread crests. In addition, a locking function may be provided. Moreover, the anti-loosening function may be imparted by applying an aging solidifying agent after attaching the nut.

軸構造6は、拡径部63のナットに緩み止めナット等が用いられて、拡径部63が軸部61に中間止めされることで、図20に示すように、拡径部63のナットとキー溝部70の底面70aとの間で、キー部材5を管径方向Xに押圧しないように、キー部材5を貫通してキー溝部70に取り付けられる。このとき、軸構造6は、キー部材5をキー溝部70に嵌め込んで固定するものの、キー溝部70からキー部材5を脱落させない範囲で、キー部材5を管径方向Xに移動できるものとする。   In the shaft structure 6, a locking nut or the like is used as a nut of the enlarged diameter portion 63, and the enlarged diameter portion 63 is intermediately fixed to the axial portion 61, so that the nut of the enlarged diameter portion 63 is shown in FIG. 20. And the bottom surface 70a of the key groove portion 70 are attached to the key groove portion 70 through the key member 5 so as not to press the key member 5 in the tube diameter direction X. At this time, although the shaft structure 6 fits and fixes the key member 5 in the key groove portion 70, the key member 5 can be moved in the tube radial direction X within a range in which the key member 5 is not dropped from the key groove portion 70. .

軸構造6は、内嵌継手4の内嵌孔部40に挿通された軸部61が係止部62で内嵌継手4に係止されて、キー部材5のキー穴部50に挿通された軸部61に拡径部63のナットが螺合される。このとき、軸構造6は、拡径部63のナットとキー溝部70の底面70aとの間で、キー部材5を管径方向Xに移動できるものとしながら、キー部材5をキー溝部70から脱落させないように拘束するものとなる。   In the shaft structure 6, the shaft portion 61 inserted into the inner fitting hole portion 40 of the inner fitting joint 4 is locked to the inner fitting joint 4 by the locking portion 62 and is inserted into the key hole portion 50 of the key member 5. The nut of the enlarged diameter portion 63 is screwed to the shaft portion 61. At this time, the shaft structure 6 drops the key member 5 from the key groove portion 70 while allowing the key member 5 to move in the tube radial direction X between the nut of the enlarged diameter portion 63 and the bottom surface 70a of the key groove portion 70. It will be restrained not to let it.

軸構造6は、キー部材5を管径方向Xに移動できる状態で拘束するため、拡径部63のナットとキー部材5の表面側5aとの間、及び、キー溝部70の底面70aとキー部材5の裏面側5bとの間の何れか一方又は両方に、僅少な隙間Sが形成される。なお、軸構造6は、キー部材5を管径方向Xに押圧しない程度で、拡径部63のナットとキー部材5の表面側5aとが軽く当接されるとともに、キー溝部70の底面70aとキー部材5の裏面側5bとが軽く当接されることで、隙間Sが形成されなくてもよい。また、隙間Sには、ワッシャー、ゴムワッシャー又は樹脂製のリング材等、キー部材5からの回転力の伝達をより低減するための図示しない緩衝材が設置されてもよい。   Since the shaft structure 6 restrains the key member 5 in a state in which the key member 5 can be moved in the tube diameter direction X, the shaft structure 6 is interposed between the nut of the enlarged diameter portion 63 and the surface side 5a of the key member 5, and the bottom surface 70a of the key groove 70 and the key. A slight gap S is formed in one or both of the back surface side 5b of the member 5. In addition, the shaft structure 6 is such that the nut of the enlarged diameter portion 63 and the surface side 5a of the key member 5 are lightly contacted with each other and the bottom surface 70a of the key groove portion 70 is not pressed against the key member 5 in the tube radial direction X. And the back surface side 5b of the key member 5 are in light contact with each other, the gap S may not be formed. Further, in the gap S, a buffer material (not shown) for reducing the transmission of the rotational force from the key member 5 such as a washer, a rubber washer, or a resin ring material may be installed.

第1鋼管杭1及び第2鋼管杭2は、図21に示すように、外嵌継手3と内嵌継手4とで管長方向Yに連結されて、複数の鋼管杭に回転トルクを導入することで、複数の鋼管杭の先端側に設けられた螺旋翼を回転させながら、地盤内8を推進して回転圧入される。このとき、第1鋼管杭1及び第2鋼管杭2は、管長方向Yで互いに連結した状態で、地盤内8で正回転又は逆回転に回転させながら、地盤内8に埋め込まれるものとなる。   As shown in FIG. 21, the first steel pipe pile 1 and the second steel pipe pile 2 are connected in the pipe length direction Y by an external fitting joint 3 and an internal fitting joint 4, and introduce rotational torque into a plurality of steel pipe piles. Then, while rotating the spiral blade provided on the tip side of the plurality of steel pipe piles, the ground 8 is propelled and rotationally press-fitted. At this time, the first steel pipe pile 1 and the second steel pipe pile 2 are embedded in the ground 8 while being rotated forwardly or reversely in the ground 8 while being connected to each other in the pipe length direction Y.

第1鋼管杭1及び第2鋼管杭2は、図21(a)に示すように、複数の鋼管杭を左回りに正回転させるとともに、図21(b)に示すように、地盤内8の硬さや障害物の存在等に応じて、複数の鋼管杭を右回りに逆回転させる。なお、第1鋼管杭1及び第2鋼管杭2は、右回りを正回転、左回りを逆回転とするものでもよい。また、第1鋼管杭1及び第2鋼管杭2は、複数の鋼管杭に打撃力を与えながら回転させてもよい。   As shown in FIG. 21A, the first steel pipe pile 1 and the second steel pipe pile 2 rotate the plurality of steel pipe piles counterclockwise, and as shown in FIG. A plurality of steel pipe piles are rotated counterclockwise in accordance with the hardness and the presence of obstacles. In addition, the 1st steel pipe pile 1 and the 2nd steel pipe pile 2 may make a clockwise rotation forward and a counterclockwise rotation. Moreover, you may rotate the 1st steel pipe pile 1 and the 2nd steel pipe pile 2, giving a striking force to several steel pipe piles.

本発明を適用した鋼管杭継手の回転抑止構造7は、図22に示すように、複数の鋼管杭を回転させるときに、回転トルクが導入される第2鋼管杭2が第1鋼管杭1に対して相対回転する。本発明を適用した鋼管杭継手の回転抑止構造7は、キー部材5がキー溝部70に架設されて、キー部材5の一方側面51が外嵌側キー溝部71の側面71aに当接するとともに、キー部材5の他方側面52が内嵌側キー溝部72の側面72aに当接する。   As shown in FIG. 22, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied has the second steel pipe pile 2 into which the rotation torque is introduced when the plurality of steel pipe piles are rotated. Rotates relative to it. In the steel pipe pile joint rotation restraint structure 7 to which the present invention is applied, the key member 5 is installed in the key groove portion 70, the one side surface 51 of the key member 5 abuts on the side surface 71 a of the outer fitting side key groove portion 71, and the key The other side surface 52 of the member 5 abuts on the side surface 72 a of the internal fitting side key groove portion 72.

鋼管杭に導入された回転トルクは、キー部材5の他方側面52が内嵌側キー溝部72の側面72aに当接することで、第2鋼管杭2からキー部材5に伝達される。また、鋼管杭に導入された回転トルクは、キー部材5の一方側面51が外嵌側キー溝部71の側面71aに当接することで、キー部材5から第1鋼管杭1に伝達される。   The rotational torque introduced into the steel pipe pile is transmitted from the second steel pipe pile 2 to the key member 5 when the other side surface 52 of the key member 5 comes into contact with the side surface 72a of the internal fitting side key groove portion 72. Further, the rotational torque introduced into the steel pipe pile is transmitted from the key member 5 to the first steel pipe pile 1 when the one side surface 51 of the key member 5 comes into contact with the side surface 71 a of the external fitting side key groove portion 71.

本発明を適用した鋼管杭継手の回転抑止構造7は、キー部材5の一方側面51及び他方側面52がキー溝部70に両側から挟み込まれて、第1鋼管杭1と第2鋼管杭2との相対回転を抑止するものとなる。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、第1鋼管杭1及び第2鋼管杭2を正回転及び逆回転で交互に回転させることで、図23に示すように、キー部材5が左回り及び右回りで交互に回動するものとなる。   The steel pipe pile joint rotation restraining structure 7 to which the present invention is applied includes a first steel pipe pile 1 and a second steel pipe pile 2 in which one side surface 51 and the other side surface 52 of the key member 5 are sandwiched between the key groove portions 70 from both sides. Relative rotation is suppressed. At this time, the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied is shown in FIG. 23 by alternately rotating the first steel pipe pile 1 and the second steel pipe pile 2 by forward rotation and reverse rotation. The key member 5 is alternately rotated counterclockwise and clockwise.

本発明を適用した鋼管杭継手の回転抑止構造7は、図20に示すように、キー穴部50がネジ切りされることなく略平滑面状に形成されて、軸構造6の軸部61がキー穴部50に螺合されることなく挿通されるものとなる。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、軸構造6の軸部61がキー穴部50に螺合されることなく挿通されることで、軸構造6の軸部61とキー部材5とが縁切りされた状態となる。   As shown in FIG. 20, the rotation prevention structure 7 of the steel pipe pile joint to which the present invention is applied is formed in a substantially smooth surface shape without the keyhole portion 50 being threaded, and the shaft portion 61 of the shaft structure 6 is formed. The key hole 50 is inserted without being screwed. At this time, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied is inserted through the shaft portion 61 of the shaft structure 6 without being screwed into the key hole portion 50, so that the shaft portion 61 of the shaft structure 6 is inserted. And the key member 5 are cut off.

本発明を適用した鋼管杭継手の回転抑止構造7は、拡径部63のナットとキー溝部70の底面70aとの間で、キー部材5を管径方向Xに押圧しないように、キー部材5がキー溝部70に取り付けられる。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、キー部材5の表面側5aにナットが接触した場合でも、キー部材5が押圧されず隙間S等が形成されることで、拡径部63のナットとキー部材5とが縁切りされた状態となる。   The steel pipe pile joint rotation restraining structure 7 to which the present invention is applied has the key member 5 so as not to press the key member 5 in the pipe radial direction X between the nut of the enlarged diameter portion 63 and the bottom surface 70a of the key groove portion 70. Is attached to the key groove 70. At this time, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied is such that even when the nut contacts the surface side 5a of the key member 5, the key member 5 is not pressed and a gap S or the like is formed. The nut of the enlarged diameter portion 63 and the key member 5 are cut off.

本発明を適用した鋼管杭継手の回転抑止構造7は、軸構造6の軸部61及び拡径部63のナットがキー部材5と縁切りされた状態となるため、図23に示すように、キー部材5が交互に回動した場合でも、キー部材5の回転力が軸構造6に伝達されないものとなる。   In the steel pipe pile joint rotation restraint structure 7 to which the present invention is applied, the shaft portion 61 of the shaft structure 6 and the nut of the enlarged diameter portion 63 are in a state of being edge-cut from the key member 5. Even when the members 5 rotate alternately, the rotational force of the key member 5 is not transmitted to the shaft structure 6.

これに対して、従来のせん断キー構造9は、図24に示すように、キー本体91の凹部92に座金付ナット93が押し込まれることで、キー本体91が座金付ナット93で押圧されるものとなる。このとき、従来のせん断キー構造9は、キー本体91と座金付ナット93とが縁切りされず、キー本体91が交互に回動することで、キー本体91の回転力が座金付ナット93に伝達されて、座金付ナット93が次第に緩むものとなる。   On the other hand, as shown in FIG. 24, the conventional shear key structure 9 is such that the key body 91 is pressed by the nut 93 with washer when the nut 93 with washer is pushed into the recess 92 of the key body 91. It becomes. At this time, in the conventional shear key structure 9, the key body 91 and the nut 93 with washer are not cut off, and the key body 91 is alternately rotated, whereby the rotational force of the key body 91 is transmitted to the nut 93 with washer. As a result, the nut 93 with washer gradually loosens.

本発明を適用した鋼管杭継手の回転抑止構造7は、図23に示すように、キー部材5が交互に回動した場合でも、キー部材5の回転力が軸構造6に伝達されず、軸構造6の軸部61から拡径部63のナットが次第に緩むことを防止する。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、拡径部63のナットが軸構造6の軸部61から緩まないため、図22に示すように、キー溝部70からキー部材5が脱落しないものとなる。これにより、本発明を適用した鋼管杭継手の回転抑止構造7は、キー溝部70からのキー部材5の脱落を防止して、第1鋼管杭1と第2鋼管杭2との相対回転をキー部材5で抑止することで、複数の鋼管杭を地盤内8で確実に回転させることが可能となる。   As shown in FIG. 23, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied does not transmit the rotational force of the key member 5 to the shaft structure 6 even when the key members 5 rotate alternately. The nut of the enlarged diameter portion 63 is prevented from gradually loosening from the shaft portion 61 of the structure 6. At this time, the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied has a structure in which the nut of the enlarged diameter portion 63 does not loosen from the shaft portion 61 of the shaft structure 6, so that as shown in FIG. 5 will not fall off. Thereby, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied prevents the key member 5 from dropping off from the key groove portion 70, and the relative rotation between the first steel pipe pile 1 and the second steel pipe pile 2 is key. By suppressing with the member 5, it becomes possible to rotate a some steel pipe pile in the ground 8 reliably.

なお、軸構造6は、図25に示すように、軸部61のボルト軸に拡径部63のナットを螺合した後に、ボルト軸のネジ山が潰されて、又は、軸部61のボルト軸に拡径部63のナットが接着材等で固定されてもよい。また、軸構造6は、ボルト軸の先端側を軸芯直交方向に貫通する割りピン64が設けられてもよい。   As shown in FIG. 25, the shaft structure 6 is formed by screwing the nut of the enlarged diameter portion 63 onto the bolt shaft of the shaft portion 61 and then crushing the screw thread of the bolt shaft or by the bolt of the shaft portion 61. The nut of the enlarged diameter portion 63 may be fixed to the shaft with an adhesive or the like. Moreover, the shaft structure 6 may be provided with a split pin 64 that penetrates the tip end side of the bolt shaft in the direction perpendicular to the axis.

このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、軸構造6の軸部61から拡径部63のナットが緩むことを、ボルト軸の潰されたネジ山や割りピン64等で確実に防止しながら、拡径部63のナットとキー溝部70の底面70aとの間で、キー部材5を押圧しないように、キー部材5をキー溝部70に取り付けることが可能となる。   At this time, the rotation prevention structure 7 of the steel pipe pile joint to which the present invention is applied, the loosening of the nut of the enlarged diameter part 63 from the shaft part 61 of the shaft structure 6, Thus, the key member 5 can be attached to the key groove portion 70 so as not to press the key member 5 between the nut of the enlarged diameter portion 63 and the bottom surface 70a of the key groove portion 70, while reliably preventing it.

本発明を適用した鋼管杭継手の回転抑止構造7は、図15に示すように、キー部材5の表面側5aに拡径部63のナットが収容される外側ザグリ穴57が形成されるため、キー部材5の表面側5aよりも拡径部63のナットを鋼管外側Bに突出させないものとなる。これにより、本発明を適用した鋼管杭継手の回転抑止構造7は、鋼管外側Bに拡径部63のナットが突出しないため、鋼管杭を回転させるときの土砂からの抵抗が低減して、複数の鋼管杭の円滑な回転を実現することが可能となる。   As shown in FIG. 15, the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied is formed with an outer counterbore hole 57 in which the nut of the enlarged diameter portion 63 is accommodated on the surface side 5 a of the key member 5. The nut of the enlarged diameter portion 63 is not protruded to the steel pipe outer side B than the surface side 5a of the key member 5. Thereby, since the nut of the enlarged diameter part 63 does not protrude in the steel pipe outer side B, the resistance from the earth and sand when rotating a steel pipe pile reduces in the rotation prevention structure 7 of the steel pipe pile joint to which this invention is applied, and plural It is possible to achieve smooth rotation of the steel pipe pile.

本発明を適用した鋼管杭継手の回転抑止構造7は、図16に示すように、内嵌継手4の内面側4aに係止部62が収容される内側ザグリ穴47が形成されるため、内嵌継手4の内面側4aよりも係止部62のボルト頭を鋼管内側Aに突出させないものとなる。これにより、本発明を適用した鋼管杭継手の回転抑止構造7は、鋼管杭を回転させるときの土砂の抵抗が低減するとともに、鋼管杭の内部の土砂を排出するためのハンマグラブがボルト頭と接触することを回避して、ボルト頭の破損を防止することが可能となる。   As shown in FIG. 16, the rotation restraining structure 7 for the steel pipe pile joint to which the present invention is applied has an inner counterbore hole 47 in which the engaging portion 62 is accommodated on the inner surface side 4 a of the internally fitted joint 4. The bolt head of the locking portion 62 is not protruded toward the steel pipe inner side A than the inner surface side 4 a of the fitting joint 4. Thereby, as for the rotation suppression structure 7 of the steel pipe pile joint to which this invention is applied, while the resistance of the earth and sand when rotating a steel pipe pile reduces, the hammer magnet for discharging the earth and sand inside a steel pipe pile contacts a bolt head. This makes it possible to prevent the bolt head from being damaged.

本発明を適用した鋼管杭継手の回転抑止構造7は、外嵌継手3に内嵌継手4を挿入する前の段階で、図10〜図17に示すように、内嵌継手4の内嵌孔部40に軸構造6の軸部61を鋼管内側Aから挿通する。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、内嵌継手4の内面側4aに、軸構造6の係止部62が仮溶接等で仮止めされる。   The steel pipe pile joint rotation restraint structure 7 to which the present invention is applied is a stage before the inner fitting joint 4 is inserted into the outer fitting joint 3, as shown in FIGS. The shaft portion 61 of the shaft structure 6 is inserted into the portion 40 from the inside A of the steel pipe. At this time, in the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied, the locking portion 62 of the shaft structure 6 is temporarily fixed to the inner surface 4a of the internal fitting 4 by temporary welding or the like.

本発明を適用した鋼管杭継手の回転抑止構造7は、内嵌継手4の内嵌孔部40の内面が、ネジ切りされることなく略平滑面状に形成される。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、内嵌継手4の内側ザグリ穴47の内面が係止部62のボルト頭と同様に略六角形状等に形成されて、係止部62のボルト頭が内側ザグリ穴47の内部で回転しないように嵌め込まれてもよい。本発明を適用した鋼管杭継手の回転抑止構造7は、これに限らず、図18、図19に示すように、内嵌継手4の内側ザグリ穴47又は内嵌孔部40の内面がネジ切りされて螺旋状のネジ穴48が形成されてもよい。   In the steel pipe pile joint rotation suppression structure 7 to which the present invention is applied, the inner surface of the inner fitting hole 40 of the inner fitting joint 4 is formed in a substantially smooth surface shape without being threaded. At this time, the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied has the inner face of the inner counterbore hole 47 of the internally fitted joint 4 formed in a substantially hexagonal shape or the like like the bolt head of the locking portion 62. The bolt head of the stopper 62 may be fitted so as not to rotate inside the inner counterbore hole 47. The steel pipe pile joint rotation prevention structure 7 to which the present invention is applied is not limited to this. As shown in FIGS. 18 and 19, the inner counterbore hole 47 of the inner fitting joint 4 or the inner face of the inner fitting hole portion 40 is threaded. Thus, a helical screw hole 48 may be formed.

本発明を適用した鋼管杭継手の回転抑止構造7は、内嵌継手4に螺旋状のネジ穴48が形成されるとともに、軸構造6の係止部62が螺旋状にネジ切りされることで、内嵌継手4のネジ穴48に、軸構造6の係止部62を螺合して固定することができる。これにより、本発明を適用した鋼管杭継手の回転抑止構造7は、軸構造6の係止部62を、内嵌継手4の内面側4aに、仮溶接や接着等の仮止めをすることなく簡易に固定することが可能となる。   The steel pipe pile joint rotation restraint structure 7 to which the present invention is applied is such that a spiral threaded hole 48 is formed in the internally fitted joint 4 and the locking portion 62 of the shaft structure 6 is threaded in a spiral manner. The locking portion 62 of the shaft structure 6 can be screwed and fixed to the screw hole 48 of the internal fitting 4. Thereby, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied does not temporarily fix the locking portion 62 of the shaft structure 6 to the inner surface side 4a of the internal fitting 4 such as temporary welding or adhesion. It can be easily fixed.

また、本発明を適用した鋼管杭継手の回転抑止構造7は、図18に示すように、軸構造6の軸部61及び係止部62が、互いに異なる向きで螺旋状にネジ切りされてもよい。このとき、本発明を適用した鋼管杭継手の回転抑止構造7は、拡径部63のナットを軸部61に螺合するとき、軸構造6の係止部62が、拡径部63のナットと同じ方向に回転して内嵌継手4のネジ切りされた内側ザグリ穴47に締め込まれる。これにより、本発明を適用した鋼管杭継手の回転抑止構造7は、軸構造6の係止部62と拡径部63とが同じ方向に共回りした場合であっても、軸構造6の係止部62が内嵌継手4のネジ切りされた内側ザグリ穴47に締め込まれるため、係止部62の脱落を防止することが可能となる。   Moreover, as shown in FIG. 18, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied, even if the shaft portion 61 and the locking portion 62 of the shaft structure 6 are screwed in a spiral in different directions. Good. At this time, in the rotation restraining structure 7 of the steel pipe pile joint to which the present invention is applied, when the nut of the enlarged diameter portion 63 is screwed to the axial portion 61, the locking portion 62 of the axial structure 6 becomes the nut of the enlarged diameter portion 63. And is tightened into the threaded inner counterbore 47 of the internal fitting 4. Thereby, the rotation suppression structure 7 of the steel pipe pile joint to which the present invention is applied can be applied to the engagement of the shaft structure 6 even when the locking portion 62 and the enlarged diameter portion 63 of the shaft structure 6 rotate together in the same direction. Since the stopper 62 is tightened into the threaded inner counterbore 47 of the internal fitting 4, it is possible to prevent the locking part 62 from falling off.

本発明を適用した鋼管杭継手の回転抑止構造7は、図6、図7に示すように、内嵌継手4を外嵌継手3に挿入したまま、外嵌継手3と内嵌継手4とを周方向Wに相対回転させて、外嵌継手3と内嵌継手4とが管長方向Yに連結されるギア式継手に用いられる。   As shown in FIG. 6 and FIG. 7, the rotation prevention structure 7 for the steel pipe pile joint to which the present invention is applied includes the outer fitting joint 3 and the inner fitting joint 4 while the inner fitting joint 4 is inserted into the outer fitting joint 3. It is used for a gear type joint in which the outer fitting joint 3 and the inner fitting joint 4 are connected in the pipe length direction Y by being relatively rotated in the circumferential direction W.

本発明を適用した鋼管杭継手の回転抑止構造7は、これに限らず、図26に示すように、外嵌継手3と内嵌継手4とを相対回転させることなく、内嵌継手4を管長方向Yに直進させて外嵌継手3に挿入するのみで、外嵌継手3と内嵌継手4とが連結されてもよい。   The steel pipe pile joint rotation suppression structure 7 to which the present invention is applied is not limited to this, and as shown in FIG. 26, the inner fitting joint 4 is connected to the pipe length without causing the outer fitting joint 3 and the inner fitting joint 4 to rotate relative to each other. The outer fitting joint 3 and the inner fitting joint 4 may be connected only by moving straight in the direction Y and inserting into the outer fitting joint 3.

このとき、外嵌継手3及び内嵌継手4は、外嵌継手3の内周面で、周方向Wに連続して溝状に延びる外嵌溝状部39が形成されるとともに、内嵌継手4の外周面で、周方向Wに連続して溝状に延びる内嵌溝状部49が形成されるものとなる。   At this time, the outer fitting joint 3 and the inner fitting joint 4 are formed on the inner peripheral surface of the outer fitting joint 3 with an outer fitting groove-like portion 39 continuously extending in the circumferential direction W in the groove shape. The inner fitting groove-like portion 49 extending in the groove shape continuously in the circumferential direction W is formed on the outer peripheral surface 4.

外嵌継手3及び内嵌継手4は、最初に、周方向Wで断続的に延びる係止片59を、外嵌継手3の外嵌溝状部39に配置したまま、内嵌継手4を管長方向Yに直進させて外嵌継手3に挿入する。外嵌継手3及び内嵌継手4は、次に、外嵌継手3の外周面から孔部58に挿入されたネジで係止片59が押し込まれて、外嵌継手3の内周面の外嵌溝状部39と、内嵌継手4の外周面の内嵌溝状部49とに、係止片59が架設されるものとなる。   In the outer fitting joint 3 and the inner fitting joint 4, first, the locking piece 59 extending intermittently in the circumferential direction W is disposed in the outer fitting groove portion 39 of the outer fitting joint 3, and the inner fitting joint 4 is connected to the pipe length. It goes straight in the direction Y and is inserted into the external fitting joint 3. Next, the outer fitting joint 3 and the inner fitting joint 4 are moved from the outer peripheral surface of the outer fitting joint 3 to the outer peripheral surface of the outer fitting joint 3 by pressing the locking piece 59 with a screw inserted into the hole 58. The locking piece 59 is constructed between the fitting groove 39 and the fitting groove 49 on the outer peripheral surface of the fitting joint 4.

外嵌継手3及び内嵌継手4は、外嵌継手3の外嵌溝状部39と内嵌継手4の内嵌溝状部49とに係止片59が架設されて、管長方向Yで互いに連結したときに、外嵌側キー溝部71と内嵌側キー溝部72とを管長方向Yに連続させたキー溝部70が形成される。このとき、外嵌継手3及び内嵌継手4は、図18に示すように、管長方向Yに連続させたキー溝部70に、キー部材5が軸構造6で押圧されないように取り付けられることで、本発明を適用した鋼管杭継手の回転抑止構造7が導入されるものとなる。   The outer fitting joint 3 and the inner fitting joint 4 are configured such that a locking piece 59 is installed between the outer fitting groove-like portion 39 of the outer fitting joint 3 and the inner fitting groove-like portion 49 of the inner fitting joint 4, and each other in the pipe length direction Y. When connected, a key groove portion 70 is formed in which the outer fitting side key groove portion 71 and the inner fitting side key groove portion 72 are continuous in the tube length direction Y. At this time, as shown in FIG. 18, the outer fitting joint 3 and the inner fitting joint 4 are attached to the key groove portion 70 continuous in the tube length direction Y so that the key member 5 is not pressed by the shaft structure 6. The rotation prevention structure 7 of the steel pipe pile joint to which the present invention is applied is introduced.

また、本発明を適用した鋼管杭継手の回転抑止構造7は、図27に示すように、外嵌継手3の内周面で、周方向Wに連続して螺旋状に延びる外嵌突状部38が形成されるとともに、内嵌継手4の外周面で、周方向Wに連続して螺旋状に延びる内嵌溝状部49が形成されて、外嵌突状部38と内嵌溝状部49とが螺合されるネジ式継手に導入されてもよい。   Moreover, the rotation prevention structure 7 of the steel pipe pile joint to which this invention is applied is an outer fitting protrusion-like part continuously extended in the circumferential direction W on the inner peripheral surface of the outer fitting joint 3, as shown in FIG. 38 is formed, and an inner fitting groove-like portion 49 extending spirally continuously in the circumferential direction W is formed on the outer peripheral surface of the inner fitting joint 4, and the outer fitting protrusion-like portion 38 and the inner fitting groove-like portion are formed. 49 may be introduced into a threaded joint with which 49 is screwed.

以上、本発明の実施形態の例について詳細に説明したが、上述した実施形態は、何れも本発明を実施するにあたっての具体化の例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならない。   As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be interpreted in a limited way.

例えば、本発明を適用した鋼管杭継手の回転抑止構造7は、第1鋼管杭1に内嵌継手4が取り付けられるとともに、第2鋼管杭2に外嵌継手3が取り付けられてもよい。また、本発明を適用した鋼管杭継手の回転抑止構造7は、第1鋼管杭1又は第2鋼管杭2の端部が切削されることで、第1鋼管杭1又は第2鋼管杭2そのものに外嵌継手3又は内嵌継手4が設けられてもよい。   For example, in the steel pipe pile joint rotation suppression structure 7 to which the present invention is applied, the inner fitting joint 4 may be attached to the first steel pipe pile 1 and the outer fitting joint 3 may be attached to the second steel pipe pile 2. Moreover, the rotation suppression structure 7 of the steel pipe pile joint which applied this invention is the 1st steel pipe pile 1 or the 2nd steel pipe pile 2 itself because the edge part of the 1st steel pipe pile 1 or the 2nd steel pipe pile 2 is cut. The outer fitting joint 3 or the inner fitting joint 4 may be provided.

1 :第1鋼管杭
2 :第2鋼管杭
3 :外嵌継手
30 :外嵌孔部
31 :外嵌山部
32 :外嵌溝部
33 :外嵌谷部
34 :外嵌先端部
34a :外面
35 :外嵌基端部
36 :外嵌段部
38 :外嵌突状部
39 :外嵌溝状部
4 :内嵌継手
4a :内面側
40 :内嵌孔部
41 :内嵌山部
42 :内嵌溝部
43 :内嵌谷部
44 :内嵌先端部
45 :内嵌基端部
45a :外面
46 :内嵌段部
47 :内側ザグリ穴
48 :ネジ穴
49 :内嵌溝状部
5 :キー部材
5a :表面側
5b :裏面側
50 :キー穴部
51 :一方側面
52 :他方側面
57 :外側ザグリ穴
58 :孔部
59 :係止片
6 :軸構造
61 :軸部
61a :端部側
61b :中間側
62 :係止部
63 :拡径部
64 :割りピン
7 :鋼管杭継手の回転抑止構造
70 :キー溝部
70a :底面
71 :外嵌側キー溝部
71a :側面
72 :内嵌側キー溝部
72a :側面
8 :地盤内
A :鋼管内側
B :鋼管外側
S :隙間
W :周方向
X :管径方向
Y :管長方向
1: 1st steel pipe pile 2: 2nd steel pipe pile 3: Outer fitting joint 30: Outer fitting hole part 31: Outer fitting mountain part 32: Outer fitting groove part 33: Outer fitting trough part 34: Outer fitting tip part 34a: Outer surface 35 : Outer fitting base end part 36: Outer fitting step part 38: Outer fitting projection part 39: Outer fitting groove-like part 4: Inner fitting joint 4a: Inner surface side 40: Inner fitting hole part 41: Inner fitting mountain part 42: Inner Fitting groove portion 43: Inner fitting trough portion 44: Inner fitting distal end portion 45: Inner fitting base end portion 45a: Outer surface 46: Inner fitting step portion 47: Inner counterbore hole 48: Screw hole 49: Inner fitting groove portion 5: Key member 5a: Front side 5b: Back side 50: Key hole 51: One side surface 52: Other side surface 57: Outer counterbore hole 58: Hole 59: Locking piece 6: Shaft structure 61: Shaft portion 61a: End side 61b: Intermediate side 62: Locking portion 63: Expanded diameter portion 64: Split pin 7: Steel pipe pile joint rotation prevention structure 70: Key groove portion 70a: Bottom surface 71: Outer Fitting side key groove portion 71a: Side surface 72: Inner fitting side key groove portion 72a: Side surface 8: Ground A: Steel pipe inner side B: Steel pipe outer side S: Gap W: Circumferential direction X: Pipe diameter direction Y: Pipe length direction

Claims (6)

複数の鋼管杭を連結して相対回転を抑止する鋼管杭継手の回転抑止構造であって、
第1鋼管杭と第2鋼管杭とを管長方向で互いに連結する外嵌継手と内嵌継手とを備え、
前記外嵌継手は、管長方向の先端側に設けられる外嵌先端部を有して、前記外嵌先端部の外面が切り欠かれることで、前記外嵌先端部に外嵌側キー溝部が形成されて、
前記内嵌継手は、管長方向の基端側に設けられる内嵌基端部を有して、前記内嵌基端部の外面が切り欠かれることで、前記内嵌基端部に内嵌側キー溝部が形成されて、
前記外嵌継手及び前記内嵌継手は、管長方向で互いに連結したときに、前記外嵌側キー溝部と前記内嵌側キー溝部とを管長方向に連続させたキー溝部が形成されて、前記外嵌側キー溝部から前記内嵌側キー溝部まで連続させて嵌め込まれるキー部材が、鋼管内側から鋼管外側まで連続する軸構造で前記キー溝部に固定されるものであり、
前記軸構造は、前記内嵌継手の内嵌孔部及び前記キー部材のキー穴部に挿通される軸部と、鋼管内側で前記内嵌継手に係止される係止部と、鋼管外側で前記軸部よりも拡径した拡径部とを有して、前記拡径部と前記キー溝部の底面との間で前記キー部材が縁切りされた状態で管径方向に移動できるように、前記キー部材を貫通して前記キー溝部に取り付けられること
を特徴とする鋼管杭継手の回転抑止構造。
A steel pipe pile joint rotation deterrent structure that inhibits relative rotation by connecting a plurality of steel pipe piles,
An outer fitting joint and an inner fitting joint for connecting the first steel pipe pile and the second steel pipe pile to each other in the pipe length direction;
The outer fitting joint has an outer fitting tip portion provided on the distal end side in the tube length direction, and an outer surface of the outer fitting tip portion is notched so that an outer fitting side key groove portion is formed at the outer fitting tip portion. Being
The inner fitting joint has an inner fitting base end portion provided on the proximal end side in the tube length direction, and an outer surface of the inner fitting base end portion is notched, so that the inner fitting base end portion has an inner fitting side. A keyway is formed,
When the outer fitting joint and the inner fitting joint are connected to each other in the tube length direction, a key groove portion is formed in which the outer fitting side key groove portion and the inner fitting side key groove portion are continuous in the tube length direction. A key member that is continuously fitted from the fitting side key groove part to the inner fitting side key groove part is fixed to the key groove part with a shaft structure continuous from the inside of the steel pipe to the outside of the steel pipe,
The shaft structure includes a shaft portion that is inserted into an inner fitting hole portion of the inner fitting joint and a key hole portion of the key member, a locking portion that is latched to the inner fitting joint on the inner side of the steel pipe, and an outer side of the steel pipe. A diameter-enlarged portion that is larger than the shaft portion, and the key member can be moved in a tube radial direction between the diameter-enlarged portion and the bottom surface of the key groove portion so as to move in the tube diameter direction. A structure for inhibiting rotation of a steel pipe pile joint, wherein the structure is attached to the key groove portion through a key member.
前記軸構造は、螺旋状にネジ切りされたボルト軸を前記軸部、及び、前記ボルト軸よりも拡径したボルト頭を前記係止部として、前記拡径部として用いられるナットが前記軸部に螺合されること
を特徴とする請求項1記載の鋼管杭継手の回転抑止構造。
In the shaft structure, a bolt shaft screwed in a spiral shape is used as the shaft portion, and a bolt head having a diameter larger than that of the bolt shaft is used as the locking portion, and a nut used as the diameter increasing portion is used as the shaft portion. The structure for inhibiting rotation of a steel pipe pile joint according to claim 1, wherein:
前記キー部材は、前記キー穴部よりも拡径させて、鋼管外側で前記拡径部が収容される外側ザグリ穴が形成されること
を特徴とする請求項1又は2記載の鋼管杭継手の回転抑止構造。
3. The steel pipe pile joint according to claim 1, wherein the key member has a diameter larger than that of the key hole portion to form an outer counterbore hole in which the enlarged diameter portion is accommodated outside the steel pipe. Anti-rotation structure.
前記内嵌継手は、前記内嵌孔部よりも拡径させて、鋼管内側で前記係止部が収容される内側ザグリ穴が形成されること
を特徴とする請求項1〜3の何れか1項記載の鋼管杭継手の回転抑止構造。
The inner fitting joint has a diameter larger than that of the inner fitting hole portion, and an inner counterbore hole in which the locking portion is accommodated is formed inside the steel pipe. The rotation prevention structure of the steel pipe pile joint of description.
前記軸構造は、前記軸部及び前記係止部が互いに異なる向きで螺旋状にネジ切りされて、前記拡径部として用いられるナットが前記軸部に螺合されるとともに、前記内嵌継手のネジ切りされた前記内側ザグリ穴に前記係止部が螺合されること
を特徴とする請求項4記載の鋼管杭継手の回転抑止構造。
In the shaft structure, the shaft portion and the locking portion are threaded in a spiral shape in different directions, and a nut used as the diameter-expanded portion is screwed to the shaft portion. The structure for inhibiting rotation of a steel pipe pile joint according to claim 4, wherein the locking portion is screwed into the threaded inner counterbore hole.
前記第1鋼管杭及び前記第2鋼管杭は、管長方向で互いに連結した状態で、正回転又は逆回転に回転させながら、地盤内に埋め込まれるものとなること
を特徴とする請求項1〜5の何れか1項記載の鋼管杭継手の回転抑止構造。
The first steel pipe pile and the second steel pipe pile are embedded in the ground while being rotated in the forward rotation or the reverse rotation in a state of being connected to each other in the pipe length direction. The rotation suppression structure of the steel pipe pile joint of any one of these.
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