JP2009138382A - Steel pipe pile connecting structure - Google Patents

Steel pipe pile connecting structure Download PDF

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JP2009138382A
JP2009138382A JP2007314559A JP2007314559A JP2009138382A JP 2009138382 A JP2009138382 A JP 2009138382A JP 2007314559 A JP2007314559 A JP 2007314559A JP 2007314559 A JP2007314559 A JP 2007314559A JP 2009138382 A JP2009138382 A JP 2009138382A
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cylinder
male
female
holes
steel pipe
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JP5021437B2 (en
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Takeshi Oki
健 沖
Mitsugi Otsuki
貢 大槻
Makoto Nagata
誠 永田
Makoto Ikeda
真 池田
Takeshi Yoshida
武 吉田
Takashi Matsumoto
隆 松本
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JFE Steel Corp
Kubota Corp
Nippon Steel Corp
Shintoku Kogyo Co Ltd
Nippon Steel Engineering Co Ltd
Okamoto Kensetsu Yohin Seisakusho KK
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JFE Steel Corp
Kubota Corp
Sumitomo Metal Industries Ltd
Shintoku Kogyo Co Ltd
Nippon Steel Engineering Co Ltd
Okamoto Kensetsu Yohin Seisakusho KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel pipe pile connecting structure which eliminates the risk of making a key of male and female cylinders come off, even if bending and tension acts on a joint portion. <P>SOLUTION: The female cylinder 10 is equipped with six through-holes 13 passing through the inside and outside of the female cylinder. In the male cylinder 20, through-holes 23 passing through the inside and outside of the male cylinder are provided in positions to face the six through-holes 13, respectively, when the male cylinder 20 is inserted into the female cylinder 10. A circumferential perimeter member 40, which is disposed in such a manner as to block the through-hole 23, is provided on the inner peripheral portion 24 of the male cylinder. A connecting member 30 is constituted as a plug in a such a shape as to be fitted into the through-holes 13 and 23. The circumferential perimeter member 40, which has bolt holes 41 for fixing the connecting members 30, fitted into the through-holes 13 and 23, by means of bolts 70, respectively, is welded and fixed to the inner peripheral portion 24 of the male cylinder 20 in a position of a circumferential portion between the bolt holes 41 adjacent to each other. An outer peripheral surface of a portion, blocking the through-hole 23, of the circumferential perimeter member 40 is formed in a planar shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、鋼管杭どうしを接続する接続構造に関する。   The present invention relates to a connection structure for connecting steel pipe piles.

鋼管杭は、通常、ねじ継手その他の機械的な継手、または現場溶接によって上下鋼管杭を接続し、長尺の基礎支持材等として供用されている。ねじ継手は、鋼管杭端部にテーパねじなどからなる雄ねじを形成し、雌ねじを有するソケットまたは拡径部等にねじ込んで接続する。そのため、ねじ継手は加工が面倒で高価である。また、現場溶接は天候に支配される影響が大きく溶接資格者の確保の点でも難点がある。   Steel pipe piles are usually used as long foundation supports by connecting upper and lower steel pipe piles by threaded joints or other mechanical joints, or by field welding. The threaded joint is formed by forming a male screw made of a taper screw or the like at the end of the steel pipe pile and screwing it into a socket having a female screw or an enlarged diameter portion. Therefore, the threaded joint is cumbersome and expensive. In addition, field welding is greatly influenced by the weather, and there is a difficulty in securing qualified welding personnel.

また、土木用の基礎杭では、杭外径より突設する厚さは、杭径により、９ｍｍ以内又は１２ｍｍ以内に制限されているので、ソケットやスリーブを用いる継手等は構造上不可となる場合もある。   In addition, in civil engineering foundation piles, the thickness protruding from the outer diameter of the pile is limited to within 9 mm or 12 mm depending on the pile diameter, so that joints using sockets and sleeves are structurally impossible. There is also.

このような要求に合致する技術として、現場溶接を必要としない継手であって、外径が鋼管杭の外径と同等の寸法の鋼管杭の接続構造が開示されている。この接続構造は、高い加工精度を必要としない簡単な構造で、高い結合力を得られる接続構造である（例えば、特許文献１参照）。   As a technique that meets such a requirement, a steel pipe pile connection structure that is a joint that does not require on-site welding and has an outer diameter that is the same as the outer diameter of the steel pipe pile is disclosed. This connection structure is a simple structure that does not require high processing accuracy and is a connection structure that can obtain a high bonding force (see, for example, Patent Document 1).

その技術手段は、連結する一方の筒体の端部にソケット部材を取付け、他方の筒体の端部にプラグ部材を取り付けて、他方の筒体のプラグ部材に一方の筒体のソケット部材を嵌め、プラグ部材とソケット部材のキー孔を合わせてキーを挿入することによって一方の筒体と他方の筒体とを連結する接続構造である。さらに、この接続構造は、上記キーが、軸方向にボルトあるいはピンを挿通する貫通孔を有し、一方、上記プラグ部材の接続部のキー孔を設けた内側に係止部材を溶接で止めて、その係止部材に、ソケット部材にプラグ部材を嵌入してキー孔を合わせて挿入したキーの上記貫通孔へ挿通したボルトあるいはピンを螺合させて係止する構成によって、キー孔に挿入したキーの抜け落ちを防止するようにしている。
特開２００６−３７６１９号公報 The technical means attaches a socket member to the end of one cylinder to be connected, attaches a plug member to the end of the other cylinder, and attaches the socket member of one cylinder to the plug of the other cylinder. It is a connection structure in which one cylindrical body and the other cylindrical body are connected by fitting and inserting the key by aligning the key holes of the plug member and the socket member. Further, in this connection structure, the key has a through-hole through which a bolt or a pin is inserted in the axial direction, and on the other hand, the locking member is fixed to the inner side of the plug member connecting portion by welding. Then, the plug member is inserted into the key hole by inserting the plug member into the socket member and aligning the key hole with the locking member and screwing the bolt or pin inserted into the through hole of the key inserted into the locking member. The key is prevented from falling out.
JP 2006-37619 A

上記特許文献１に開示された接続構造によれば、ソケット部材とプラグ部材がキーによって連結しているので、筒体は回転力、引張力、圧縮力にも十分な抗力を有する。ところが、上記プラグ部材の接続部のキー孔を設けた内側に上記係止部材を溶接で止めることによってこの係止部材とプラグ部材とが一体化されるように接合されているため、継手部に曲げや引張りが作用するとその係止部材も曲げや引張りの作用を受け、この係止部材に設けられたねじ孔が変形するおそれがある。その結果、キー孔に挿入したキーを固定しているボルトが係止部材から抜け落ち、キーの脱落を招くおそれがある。   According to the connection structure disclosed in Patent Document 1, since the socket member and the plug member are connected by the key, the cylindrical body has sufficient resistance against rotational force, tensile force, and compressive force. However, since the locking member and the plug member are joined so as to be integrated by fastening the locking member by welding inside the key hole of the connecting portion of the plug member, When bending or tension is applied, the locking member is also subjected to bending or tension, and the screw hole provided in the locking member may be deformed. As a result, the bolt fixing the key inserted into the key hole may fall out of the locking member, causing the key to drop off.

また、上記特許文献１に開示された接続構造では、上記係止部材の外周面が円筒面であるため、キーと係止部材とは一点で接触し、その周囲は隙間を生ずる。従って、キーを係止部材に固定するボルトは、この接触部で集中応力を受け、折損等のおそれがある。これを避けるためにキーの端面を曲面加工することも考えられるが、その製作及び組立作業に大きな困難性を伴う。また、このような欠点を改善する技術として、係止部材を小片の平板状の部材とし、プラグ部材の内面に溶接取り付けする例も示されているが、この構造は、小片の係止部材を溶接取り付けするので、プラグ部材と係止部材との完全な一体化による欠点が顕著に生ずる。   In the connection structure disclosed in Patent Document 1, since the outer peripheral surface of the locking member is a cylindrical surface, the key and the locking member come into contact at one point, and a gap is formed around the key. Therefore, the bolt that fixes the key to the locking member receives concentrated stress at the contact portion, and may be broken. In order to avoid this, it is conceivable to process the end face of the key in a curved surface, but this involves a great difficulty in manufacturing and assembling work. In addition, as a technique for improving such a drawback, an example in which the locking member is a small flat plate-like member and is welded to the inner surface of the plug member is shown. Since it is welded, there is a significant disadvantage caused by the complete integration of the plug member and the locking member.

本発明は、上記事情に鑑み、継手部の圧縮、引張り、曲げ、ねじり強度が十分に確保されるとともに、継手部に曲げや引張りが作用しても雄雌円筒のキーが脱落するおそれのない鋼管杭接続構造を提供することを目的とするものである。   In view of the above circumstances, the present invention ensures sufficient compression, tension, bending, and torsional strength of the joint, and there is no risk that the key of the male and female cylinders will fall off even if the joint is bent or pulled. It aims at providing a steel pipe pile connection structure.

上記目的を達成する本発明の鋼管杭接続構造は、互いに挿脱自在な雄円筒と雌円筒とこれらの結合部材とからなり、上記雄円筒と上記雌円筒はそれぞれ鋼管杭の端部に取り付ける取付部を備え、上記雌円筒は複数の雌円筒内外貫通孔を備え、上記雄円筒は上記雌円筒に挿入したとき上記複数の雌円筒内外貫通孔に対向する位置に雄円筒内外貫通孔を有するとともに内周部にこの雄円筒内外貫通孔を塞ぐように配備された円周帯状部材を備え、上記結合部材は上記雌円筒内外貫通孔および上記雄円筒内外貫通孔に嵌合する形状を有する栓とし、上記円周帯状部材は上記雌円筒内外貫通孔および上記雄円筒内外貫通孔に嵌合した上記結合部材をそれぞれ固定する固定手段を有するとともにこの固定手段相互間の円周部の位置で上記雄円筒の内周部に溶接固定され、この円周帯状部材の上記雄円筒内外貫通孔を塞ぐ部分の外周面を平面形状としたことを特徴とする。   The steel pipe pile connection structure of the present invention that achieves the above object comprises a male cylinder and a female cylinder that are detachable from each other, and a coupling member thereof, and the male cylinder and the female cylinder are attached to the ends of the steel pipe pile, respectively. The female cylinder has a plurality of female cylinder inner and outer through holes, and the male cylinder has male male inner and outer through holes at positions facing the female cylinder inner and outer through holes when inserted into the female cylinder. A circumferential belt-like member arranged so as to close the male cylinder inner and outer through-holes is provided on the inner peripheral portion, and the coupling member is a plug having a shape that fits into the female cylinder inner and outer through-holes and the male cylinder inner and outer through-holes. The circumferential belt-like member has fixing means for fixing the coupling member fitted in the female cylinder inner / outer through hole and the male cylinder inner / outer through hole, and at the position of the circumferential portion between the fixing means. Inner circumference of cylinder Fixed by welding, characterized in that the outer peripheral surface of a portion for closing the male cylindrical inner and outer through-holes of the circumferential strips and planar shape.

本発明の鋼管杭接続構造は、上記雌円筒が複数の雌円筒内外貫通孔を備え、上記雄円筒が上記雌円筒に挿入したとき上記複数の雌円筒内外貫通孔に対向する位置に雄円筒内外貫通孔を有するものであるため、構造が簡易であり加工が容易である。また、本発明の鋼管杭接続構造は、上記結合部材が上記雌円筒内外貫通孔および上記雄円筒内外貫通孔に嵌合する形状を有する栓としたことから、継手部の圧縮、引張、曲げ、ねじり強度が十分に確保された構造である。   In the steel pipe pile connection structure of the present invention, the female cylinder is provided with a plurality of female cylinder inner and outer through holes, and the male cylinder inner and outer positions are positioned opposite to the female cylinder inner and outer through holes when the male cylinder is inserted into the female cylinder. Since it has a through-hole, the structure is simple and processing is easy. In addition, the steel pipe pile connection structure of the present invention is a plug having a shape in which the coupling member is fitted to the female cylinder inner and outer through-holes and the male cylinder inner and outer through-holes. This structure has sufficient torsional strength.

また、本発明の鋼管杭接続構造は、上記雄円筒が内周部に上記雄円筒内外貫通孔を塞ぐように配備された円周帯状部材を備え、この円周帯状部材に上記結合部材をそれぞれ固定する固定手段を備えている。この固定手段は、ねじ孔等でもよい。本発明では、上記円周帯状部材を固定手段から離れた位置で雄円筒の内周部に溶接固定したことにより、この円周帯状部材の固定手段近傍の部分は雄円筒の内周部に溶接部以外では一体化されない構造となる。そのため、継手部に曲げや引張りが作用しても、円周帯状部材の固定手段位置と溶接位置が、杭軸方向に対して互いにずれているため、例えばねじ孔はその曲げや引張りの影響を直接受けない。従って、結合部材の固定部が損傷を受けることが防止され、雄雌円筒の結合部材（キー）が脱落するおそれがない。   Moreover, the steel pipe pile connection structure of the present invention includes a circumferential belt-like member arranged so that the male cylinder closes the male cylinder inner and outer through-holes in the inner circumferential portion, and the coupling member is attached to the circumferential belt-like member, respectively. A fixing means for fixing is provided. This fixing means may be a screw hole or the like. In the present invention, the circumferential belt-like member is welded and fixed to the inner peripheral portion of the male cylinder at a position away from the fixing means, so that the portion of the circumferential belt-like member in the vicinity of the fixing means is welded to the inner peripheral portion of the male cylinder. It becomes a structure which is not integrated except a part. For this reason, even if bending or tension acts on the joint, the fixing means position and the welding position of the circumferential band member are shifted from each other with respect to the pile axis direction. Do not receive directly. Accordingly, the fixing portion of the coupling member is prevented from being damaged, and there is no possibility that the coupling member (key) of the male and female cylinders is dropped.

また、本発明の鋼管杭接続構造では、上記円周帯状部材の上記雄円筒内外貫通孔を塞ぐ部分の外周面を平面形状としたため、その外周面が結合部材の端面と密着する。従って、従来技術の問題点を生ずることなく、円周帯状部材と結合部材の対向する面同士を隙間なく接触させることができ、かつ、上記雄円筒および上記雌円筒の設計断面と結合部材の有効断面を同一にすることができる。   Moreover, in the steel pipe pile connection structure of this invention, since the outer peripheral surface of the part which plugs up the said male cylinder inner and outer through-hole of the said circumferential belt-shaped member was made into planar shape, the outer peripheral surface closely_contact | adheres with the end surface of a coupling member. Accordingly, the opposing surfaces of the circumferential belt-like member and the coupling member can be brought into contact with each other without any gap without causing problems of the prior art, and the design cross section of the male cylinder and the female cylinder and the coupling member are effective. The cross section can be the same.

ここで、上記本発明の鋼管杭接続構造は、上記円周帯状部材の溶接固定がこの円周帯状部材の杭軸方向上端部および／または杭軸方向下端部であってもよく、特に、円周帯状部材の杭軸方向上端部または杭軸方向下端部のみで溶接固定されていると、継手部に曲げや引張りが作用しても円周帯状部材の固定手段はその曲げや引張りの影響をより一層受けづらいため、好適である。   Here, in the steel pipe pile connection structure of the present invention, the welding and fixing of the circumferential band-shaped member may be the pile axial direction upper end part and / or the pile axial direction lower end part of the circumferential band-shaped member. If only the upper end in the pile axial direction or the lower end in the pile axial direction of the circumferential band member is welded and fixed, even if bending or tension acts on the joint, the fixing means of the circumferential band member will not be affected by the bending or tension. It is preferable because it is more difficult to receive.

本発明の鋼管杭接続構造によれば、継手部の圧縮、引張、曲げ、ねじり強度が十分に確保されるとともに、継手部に曲げや引張りが作用しても円周帯状部材の固定手段はその曲げや引張りの影響を直接受けないことから結合部材の固定部が損傷を受けることが防止されて雄雌円筒の結合部材（キー）が脱落するおそれがない。   According to the steel pipe pile connection structure of the present invention, the compression, tension, bending, and torsional strength of the joint portion are sufficiently ensured, and the means for fixing the circumferential belt-like member is the same even if bending or tension acts on the joint portion. Since it is not directly affected by bending or pulling, the fixing portion of the coupling member is prevented from being damaged, and there is no possibility that the coupling member (key) of the male and female cylinders falls off.

以下、図面を参照して本発明の実施の形態を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の鋼管杭接続構造の実施例である鋼管杭接続構造における接続後の状態を斜め上から見た斜視図であり、図２は、図１に示す鋼管杭接続構造の縦断面図である。また、図３は、図２のＡ−Ａ矢視断面図であり、図４は、図３のＢ部拡大図である。また、図５は、図１〜図３に示す雌円筒１０の縦断面図であり、図６は、図１〜図３に示す雄円筒２０の縦断面図であり、図７は、図１〜図４に示す結合部材３０の斜視図である。   FIG. 1 is a perspective view of a state after connection in a steel pipe pile connection structure which is an embodiment of the steel pipe pile connection structure of the present invention as viewed obliquely from above, and FIG. 2 is a longitudinal section of the steel pipe pile connection structure shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4 is an enlarged view of a portion B in FIG. 5 is a longitudinal sectional view of the female cylinder 10 shown in FIGS. 1 to 3, FIG. 6 is a longitudinal sectional view of the male cylinder 20 shown in FIGS. 1 to 3, and FIG. FIG. 5 is a perspective view of the coupling member 30 shown in FIG. 4.

図１〜図３に示す鋼管杭接続構造は、互いに挿脱自在な雄円筒２０と雌円筒１０とこれらの結合部材３０とからなる接続構造である。この鋼管杭接続構造は、下側の鋼管杭５０の頭部に取付られた雌円筒１０内に、上側の鋼管杭６０の底部に取付られた雄円筒２０を挿入するように構成されている。   The steel pipe pile connection structure shown in FIGS. 1 to 3 is a connection structure including a male cylinder 20, a female cylinder 10, and a coupling member 30 that are detachable from each other. This steel pipe pile connection structure is configured to insert the male cylinder 20 attached to the bottom of the upper steel pipe pile 60 into the female cylinder 10 attached to the head of the lower steel pipe pile 50.

雌円筒１０は、図２，図５に示すように、下側の鋼管杭５０内に裏当て板５１を当てて基部１１を円周溶接５２によって取り付けられている。この基部１１は、本発明にいう取付部の一例に相当する。また、この雌円筒１０は、下側の鋼管杭５０の外径と一致する外径を有する。また、この雌円筒１０は、例えば図１，図２，図５に示すように、端面１２から一定距離の位置に形成された６個の雌円筒内外貫通孔１３を備えている。   As shown in FIGS. 2 and 5, the female cylinder 10 has a base 11 attached to the lower steel pipe pile 50 with a backing plate 51 attached thereto by circumferential welding 52. The base portion 11 corresponds to an example of an attachment portion according to the present invention. The female cylinder 10 has an outer diameter that matches the outer diameter of the lower steel pipe pile 50. The female cylinder 10 also includes six female cylinder inner and outer through holes 13 formed at a predetermined distance from the end face 12, as shown in FIGS. 1, 2, and 5, for example.

雄円筒２０は、図２，図６に示すように、上側の鋼管杭６０内に裏当て板６１を当てて基部２１を円周溶接６２によって取り付けられている。この基部２１は、本発明にいう取付部の一例に相当する。また、この雄円筒２０は、上側の鋼管杭６０の外径と一致する外径を有する。また、この雄円筒２０は、例えば図２，図６に示すように、雌円筒１０の端面１２に当接する当接面２２を備えるとともに、その雌円筒１０に挿入したとき上記６個の雌円筒内外貫通孔１３に対向する位置に雄円筒内外貫通孔２３を有する。さらに、この雄円筒２０は、図２，図３，図６に示すように、内周部２４に雄円筒内外貫通孔２３を塞ぐように配備された円周帯状部材４０を備えている。   As shown in FIGS. 2 and 6, the male cylinder 20 has a base 21 attached to the upper steel pipe pile 60 with a backing plate 61 by a circumferential weld 62. The base portion 21 corresponds to an example of the attachment portion referred to in the present invention. The male cylinder 20 has an outer diameter that matches the outer diameter of the upper steel pipe pile 60. The male cylinder 20 includes a contact surface 22 that contacts the end surface 12 of the female cylinder 10 as shown in FIGS. 2 and 6, for example, and the six female cylinders when inserted into the female cylinder 10. A male cylinder inner / outer through hole 23 is provided at a position facing the inner / outer through hole 13. Further, as shown in FIGS. 2, 3, and 6, the male cylinder 20 includes a circumferential belt-like member 40 that is disposed in the inner peripheral portion 24 so as to close the through-hole 23 in the male cylinder.

このような雌円筒１０や雄円筒２０は、構造が簡易であるため、例えば旋削加工及びフライス加工やレーザ加工によって容易に加工することができ、コストアップを招来することがない。   Since the female cylinder 10 and the male cylinder 20 have a simple structure, the female cylinder 10 and the male cylinder 20 can be easily processed by, for example, turning, milling, or laser processing, and the cost is not increased.

結合部材３０は、例えば図１，図２，図７に示すように、雌円筒内外貫通孔１３および雄円筒内外貫通孔２３からなる空間に嵌合する円形状断面を有する栓である。また、結合部材３０は、頭部３１から底部３２までを貫通し、ボルト７０が挿入されるボルト貫通孔３３を有する。尚、ボルト貫通孔３３の頭部３１側には拡径部３４が形成されており、挿入したボルト７０の頭部が拡径部３４に収納されるようになっている。   For example, as shown in FIGS. 1, 2, and 7, the coupling member 30 is a plug having a circular cross section that fits into a space formed by a female cylinder inner / outer through hole 13 and a male cylinder inner / outer through hole 23. Further, the coupling member 30 has a bolt through hole 33 that penetrates from the head 31 to the bottom 32 and into which the bolt 70 is inserted. An enlarged diameter portion 34 is formed on the head 31 side of the bolt through-hole 33 so that the head of the inserted bolt 70 is accommodated in the enlarged diameter portion 34.

また、上記円周帯状部材４０は、雌円筒内外貫通孔１３および雄円筒内外貫通孔２３からなる空間に結合部材３０を嵌合したときに、結合部材３０のボルト貫通孔３３と対向する位置にボルト７０と螺合するボルト孔４１を有し、結合部材３０のボルト貫通孔３３に挿入したボルト７０をボルト孔４１に螺合することによって結合部材３０が固定されている。このボルト孔４１が、本発明にいう固定手段の一例に相当する。   Further, the circumferential belt-like member 40 is located at a position facing the bolt through hole 33 of the coupling member 30 when the coupling member 30 is fitted in a space formed by the female cylinder inner / outer through hole 13 and the male cylinder inner / outer through hole 23. The coupling member 30 is fixed by screwing the bolt 70 inserted into the bolt through hole 33 of the coupling member 30 into the bolt hole 41. This bolt hole 41 corresponds to an example of the fixing means referred to in the present invention.

さらに、この円周帯状部材４０は、隣接するボルト孔４１相互間の円周部の位置で、雄円筒２０の内周部２４に、円周帯状部材の杭軸方向上端部および杭軸方向下端部が溶接８０により固定されており、ボルト孔４１近傍では溶接固定されていない。そのため、円周帯状部材４０のボルト孔４１近傍の部分は雄円筒２０の内周部２４に溶接部以外では一体化されないような形態で結合されることとなる。そのため、継手部に曲げや引張りが作用しても円周帯状部材４０のボルト孔４１はその曲げや引張りの影響を直接受けない。従って、結合部材３０のボルト孔４１が損傷を受けることが防止され、ボルト７０が抜け落ちたり結合部材３０が脱落するおそれがない。尚、溶接８０による固定は、隣接するボルト孔４１の間の円周部の位置で雄円筒２０の内周部２４に施せばよく、前記円周帯状部材の杭軸方向上端部または杭軸方向下端部のみで溶接されていてもよく、両方の位置で溶接されていてもよい。   Further, the circumferential belt-like member 40 is located at the circumferential portion between the adjacent bolt holes 41 at the inner circumferential portion 24 of the male cylinder 20 at the pile axial upper end and the pile axial lower end of the circumferential belt-like member. The part is fixed by welding 80 and is not fixed by welding in the vicinity of the bolt hole 41. Therefore, the portion in the vicinity of the bolt hole 41 of the circumferential belt-like member 40 is coupled to the inner circumferential portion 24 of the male cylinder 20 in a form that is not integrated except for the welded portion. Therefore, even if bending or tension acts on the joint portion, the bolt hole 41 of the circumferential belt-like member 40 is not directly affected by the bending or tension. Therefore, the bolt hole 41 of the coupling member 30 is prevented from being damaged, and there is no possibility that the bolt 70 falls off or the coupling member 30 falls off. The welding 80 may be fixed to the inner peripheral portion 24 of the male cylinder 20 at the position of the circumferential portion between the adjacent bolt holes 41, and the upper end portion of the circumferential strip member in the pile axial direction or the pile axial direction. It may be welded only at the lower end, or may be welded at both positions.

また、円周帯状部材４０は、図４に示すように、円周帯状部材４０の雄円筒内外貫通孔２３を塞ぐ部分の外周面が平面形状とされている。そのため、その外周面が、結合部材３０の対向する面（底部３２）と密着する。従って、円周帯状部材４０と結合部材３０の対向する面同士を隙間なく接触させることができ、かつ、雄円筒２０および雌円筒１０の断面と結合部材３０の有効断面を同一にすることができる。   In addition, as shown in FIG. 4, the circumferential belt-like member 40 has a planar shape on the outer circumferential surface of a portion of the circumferential belt-like member 40 that closes the male cylinder inner / outer through-hole 23. Therefore, the outer peripheral surface is in close contact with the opposing surface (bottom portion 32) of the coupling member 30. Therefore, the opposing surfaces of the circumferential belt-like member 40 and the coupling member 30 can be brought into contact with each other without any gap, and the cross sections of the male cylinder 20 and the female cylinder 10 can be made the same as the effective cross section of the coupling member 30. .

次に、雄円筒２０と雌円筒１０との接続について説明する。   Next, the connection between the male cylinder 20 and the female cylinder 10 will be described.

図３の実施例に示すように、下側の鋼管杭５０に取り付けられた雌円筒１０に６個の雌円筒内外貫通孔１３が設けられている。これらの雌円筒内外貫通孔１３の位置に、上側の鋼管杭６０に取り付けられた雄円筒２０に形成された雄円筒内外貫通孔２３の位置を合わせて、雄円筒２０を雌円筒１０内に上方から杭軸に沿って挿入する。これにより、雌円筒１０の端面１２に雄円筒２０の当接面２２が当接する。   As shown in the embodiment of FIG. 3, six female cylinder inner and outer through holes 13 are provided in the female cylinder 10 attached to the lower steel pipe pile 50. The position of the male cylinder inner / outer through hole 23 formed in the male cylinder 20 attached to the upper steel pipe pile 60 is aligned with the position of the female cylinder inner / outer through hole 13, and the male cylinder 20 is moved upward into the female cylinder 10. Insert along the pile axis. Thereby, the contact surface 22 of the male cylinder 20 contacts the end surface 12 of the female cylinder 10.

次に、雌円筒内外貫通孔１３および雄円筒内外貫通孔２３からなる空間に結合部材３０を嵌合する。   Next, the coupling member 30 is fitted into the space formed by the female cylinder inner and outer through holes 13 and the male cylinder inner and outer through holes 23.

次に、結合部材３０のボルト貫通孔３３にボルト７０を挿入し、雄円筒２０の内周部２４に雄円筒内外貫通孔２３を塞ぐように配備された円周帯状部材４０のボルト孔４１にそのボルト７０を螺合し、結合部材３０を固定する。   Next, the bolt 70 is inserted into the bolt through hole 33 of the coupling member 30, and the bolt hole 41 of the circumferential belt-like member 40 arranged so as to close the male cylinder inner / outer through hole 23 in the inner peripheral portion 24 of the male cylinder 20. The bolt 70 is screwed to fix the coupling member 30.

これにより、鋼管杭５０と６０との接続部は強固な接続構造となり、圧縮、引張、曲げ、ねじりに対して強固な継手を形成する。   Thereby, the connection part of the steel pipe piles 50 and 60 becomes a firm connection structure, and forms a strong joint with respect to compression, tension, bending, and torsion.

尚、上述した実施形態では、下側の鋼管杭に雌円筒を取付け、上側の鋼管杭に雄円筒を取り付けた例を挙げて説明したが、これに限られるものではなく、下側の鋼管杭に雄円筒を取付け、上側の鋼管杭に雌円筒を取り付けた態様であってもよい。   In the above-described embodiment, the example in which the female cylinder is attached to the lower steel pipe pile and the male cylinder is attached to the upper steel pipe pile is described. However, the present invention is not limited to this, and the lower steel pipe pile is not limited thereto. The male cylinder may be attached to the upper steel pipe pile, and the female cylinder may be attached to the upper steel pipe pile.

本発明の鋼管杭接続構造の実施例である鋼管杭接続構造における接続後の状態を斜め上から見た斜視図である。It is the perspective view which looked at the state after the connection in the steel pipe pile connection structure which is the Example of the steel pipe pile connection structure of this invention from diagonally upward. 図１に示す鋼管杭接続構造の縦断面図である。It is a longitudinal cross-sectional view of the steel pipe pile connection structure shown in FIG. 図２のＡ−Ａ矢視断面図である。It is AA arrow sectional drawing of FIG. 図３のＢ部拡大図である。It is the B section enlarged view of FIG. 図１〜図３に示す雌円筒の縦断面図である。It is a longitudinal cross-sectional view of the female cylinder shown in FIGS. 図１〜図３に示す雄円筒の縦断面図である。It is a longitudinal cross-sectional view of the male cylinder shown in FIGS. 図１〜図４に示す結合部材の斜視図である。It is a perspective view of the coupling member shown in FIGS.

符号の説明Explanation of symbols

１０ 雌円筒
１１ 基部
１２ 端面
１３ 雌円筒内外貫通孔
２０ 雄円筒
２１ 基部
２２ 当接面
２３ 雄円筒内外貫通孔
２４ 内周部
３０ 結合部材
３１ 頭部
３２ 底部
３３ ボルト貫通孔
３４ 拡径部
４０ 円周帯状部材
４１ ボルト孔
５０ 下側の鋼管杭
５１ 裏当て板
５２ 円周溶接
６０ 上側の鋼管杭
６１ 裏当て板
６２ 円周溶接
７０ ボルト
８０ 溶接 DESCRIPTION OF SYMBOLS 10 Female cylinder 11 Base 12 End surface 13 Female cylinder inner / outer through-hole 20 Male cylinder 21 Base 22 Contact surface 23 Male cylinder inner / outer through-hole 24 Inner peripheral part 30 Coupling member 31 Head part 32 Bottom part 33 Bolt through-hole 34 Expanded part 40 Circle Circumferential member 41 Bolt hole 50 Lower steel pipe pile 51 Back plate 52 Circumferential welding 60 Upper steel pipe pile 61 Backing plate 62 Circumferential welding 70 Bolt 80 Welding

Claims (2)

互いに挿脱自在な雄円筒と雌円筒とこれらの結合部材とからなり、前記雄円筒と前記雌円筒はそれぞれ鋼管杭の端部に取り付ける取付部を備え、前記雌円筒は複数の雌円筒内外貫通孔を備え、前記雄円筒は前記雌円筒に挿入したとき前記複数の雌円筒内外貫通孔に対向する位置に雄円筒内外貫通孔を有するとともに内周部に該雄円筒内外貫通孔を塞ぐように配備された円周帯状部材を備え、前記結合部材は前記雌円筒内外貫通孔および前記雄円筒内外貫通孔に嵌合する形状を有する栓とし、前記円周帯状部材は前記雌円筒内外貫通孔および前記雄円筒内外貫通孔に嵌合した前記結合部材をそれぞれ固定する固定手段を有するとともに該固定手段相互間の円周部の位置で前記雄円筒の内周部に溶接固定され、該円周帯状部材の前記雄円筒内外貫通孔を塞ぐ部分の外周面を平面形状としたことを特徴とする鋼管杭接続構造。   The male cylinder and the female cylinder each include a male cylinder and a female cylinder which are detachable from each other, and a coupling member thereof. Each of the male cylinder and the female cylinder includes a mounting portion attached to an end of a steel pipe pile, and the female cylinder penetrates a plurality of female cylinders. The male cylinder has a male cylinder inner / outer through hole at a position facing the plurality of female cylinder inner / outer through holes when the male cylinder is inserted into the female cylinder, and closes the male cylinder inner / outer through hole in an inner peripheral portion. A circumferential band-shaped member provided, the coupling member being a plug having a shape that fits into the female cylinder inner and outer through-holes and the male cylinder inner and outer through-holes, and the circumferential band-shaped member includes the female cylinder inner and outer through-holes and It has fixing means for fixing each of the coupling members fitted into the inner and outer through-holes of the male cylinder, and is welded and fixed to the inner peripheral part of the male cylinder at the position of the circumferential part between the fixing means, Inside and outside of the male cylinder of the member Steel pipe pile connecting structure, characterized in that the outer peripheral surface of a portion for closing the hole and a flat shape. 前記円周帯状部材の溶接固定は該円周帯状部材の杭軸方向上端部および／または杭軸方向下端部であることを特徴とする請求項１記載の鋼管杭接続構造。   The steel pipe pile connection structure according to claim 1, wherein the welding and fixing of the circumferential belt-like member is an upper end portion in the pile axial direction and / or a lower end portion in the pile axial direction of the circumferential belt-like member.
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WO2011122349A1 (en) * 2010-03-29 2011-10-06 日鐵住金建材株式会社 Mechanical joint structure for tubular steel piles
JP2013011095A (en) * 2011-06-29 2013-01-17 Nippon Steel & Sumikin Metal Products Co Ltd Joint structure for steel pipe
JP2013227810A (en) * 2012-04-26 2013-11-07 Tomita Seisakusho:Kk Joint part structure
JP2013227809A (en) * 2012-04-26 2013-11-07 Tomita Seisakusho:Kk Joint part structure
JP2014169545A (en) * 2013-03-01 2014-09-18 Nippon Steel & Sumikin Bussan Corp Connecting structure of steel pipe pile
CN109371926A (en) * 2018-12-10 2019-02-22 中国电建集团贵阳勘测设计研究院有限公司 A kind of rear pull type hydraulic press branch free bearing structure
CN109610448A (en) * 2018-10-15 2019-04-12 板垣次男 Steel-pipe pile connecting jacket structure
KR20240004686A (en) 2021-06-24 2024-01-11 제이에프이 스틸 가부시키가이샤 Joint pipe and its manufacturing method, design method, joint pipe-attached steel pipe and its manufacturing method, design method, steel pipe pile, and steel pipe pile construction method
JP7441703B2 (en) 2020-03-31 2024-03-01 日鉄建材株式会社 Steel pipe mechanical joint structure

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011122349A1 (en) * 2010-03-29 2011-10-06 日鐵住金建材株式会社 Mechanical joint structure for tubular steel piles
JP2011208373A (en) * 2010-03-29 2011-10-20 Nippon Steel & Sumikin Metal Products Co Ltd Mechanical joint structure of steel pipe pile
JP2013011095A (en) * 2011-06-29 2013-01-17 Nippon Steel & Sumikin Metal Products Co Ltd Joint structure for steel pipe
JP2013227810A (en) * 2012-04-26 2013-11-07 Tomita Seisakusho:Kk Joint part structure
JP2013227809A (en) * 2012-04-26 2013-11-07 Tomita Seisakusho:Kk Joint part structure
JP2014169545A (en) * 2013-03-01 2014-09-18 Nippon Steel & Sumikin Bussan Corp Connecting structure of steel pipe pile
CN109610448A (en) * 2018-10-15 2019-04-12 板垣次男 Steel-pipe pile connecting jacket structure
CN109371926A (en) * 2018-12-10 2019-02-22 中国电建集团贵阳勘测设计研究院有限公司 A kind of rear pull type hydraulic press branch free bearing structure
CN109371926B (en) * 2018-12-10 2024-01-23 中国电建集团贵阳勘测设计研究院有限公司 Back-pulling hydraulic press support hinge seat structure
JP7441703B2 (en) 2020-03-31 2024-03-01 日鉄建材株式会社 Steel pipe mechanical joint structure
KR20240004686A (en) 2021-06-24 2024-01-11 제이에프이 스틸 가부시키가이샤 Joint pipe and its manufacturing method, design method, joint pipe-attached steel pipe and its manufacturing method, design method, steel pipe pile, and steel pipe pile construction method

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