JP5885110B2 - Pile joint structure - Google Patents

Pile joint structure Download PDF

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JP5885110B2
JP5885110B2 JP2013106703A JP2013106703A JP5885110B2 JP 5885110 B2 JP5885110 B2 JP 5885110B2 JP 2013106703 A JP2013106703 A JP 2013106703A JP 2013106703 A JP2013106703 A JP 2013106703A JP 5885110 B2 JP5885110 B2 JP 5885110B2
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arc
shear ring
fitting
pile
shaped
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JP2014227688A (en
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雅道 勝田
雅道 勝田
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Nippon Hume Corp
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles

Description

本発明は、プレキャストコンクリート杭やその他の杭を地中に建て込む際に、互いに軸方向に接合される杭間を連結する杭の継手部構造に関する。   TECHNICAL FIELD The present invention relates to a joint structure of a pile that connects between piles joined together in the axial direction when a precast concrete pile and other piles are built in the ground.

既製杭を地中に建て込む際には、所定長さのプレキャストコンクリート杭を必要に応じて杭軸方向に連結しつつ所望の深さにまで建て込む方法が一般的であり、その際の杭間の連結は、従来、各プレキャストコンクリート杭の端部に一体化させた金属製の両端部金具を連結手段によって連結する方法が採られている。   When building ready-made piles in the ground, it is common to build precast concrete piles of a predetermined length to the desired depth while connecting them in the direction of the pile axis as necessary. Conventionally, a method of connecting metal end fittings integrated with the end portions of each precast concrete pile by connecting means has been adopted.

この連結手段は、両端部金具の外周端縁間を溶接するのが一般的であるが、近年においては、既製杭間を溶接によらないで連結する無溶接継手も開発されている。   This connection means is generally welded between the outer peripheral edges of the metal fittings at both ends, but in recent years, a non-welded joint has also been developed that connects the existing piles without welding.

従来の無溶接継手には、図14に示すように、互いに連結しようとする両杭1,1の端部に一体化させた端部金具2,2に跨らせて両者の外周に嵌め合わされる円筒を周方向で複数に分割した形状の弧状プレート3,3...を備え、弧状プレート3,3...の内周面に形成した凹溝4内に、両端部金具2,2の外周面に突設したフランジ状の凸条5,5を重ね合わせた状態で嵌め合わせ、弧状プレート3を両端部金具2,2に対してボルト6によって固定する方法が開発されている(例えば特許文献1)。   As shown in FIG. 14, the conventional non-welded joint is fitted on the outer periphery of both piles 1, 2 that are integrated with the ends of both piles 1, 1 to be connected to each other. Are provided with arc-shaped plates 3, 3... Having a shape obtained by dividing the cylinder into a plurality of portions in the circumferential direction. A method has been developed in which flange-like ridges 5 and 5 projecting on the outer peripheral surface of the metal plate are fitted in an overlapped manner, and the arc-shaped plate 3 is fixed to the metal fittings 2 and 2 with bolts 6 (for example, Patent Document 1).

また、前述した弧状プレート3,3...を固定する方法として、図15に示すように、両杭1,1の端部金具2,2に跨らせて装着した弧状プレート3の端部外周に蟻型を縦割りにした形状の弧状プレート間連結用突起3a,3aを形成し、この蟻型に嵌り合うテーパー蟻溝7aを有する板状の弧状プレート間連結金具7を使用し、テーパー蟻溝7aに連結用突起3a,3aを嵌め合わせて弧状プレート間連結金具7をスライドさせることによって、弧状プレート3,3を互いに引き寄せつつ連結させるようにしたものが開発されている(例えば特許文献2)。   Moreover, as shown in FIG. 15, as a method of fixing the above-mentioned arc-shaped plates 3, 3..., The end portions of the arc-shaped plates 3 mounted across the end fittings 2, 2 of both piles 1, 1. The arcuate plate-to-arc connecting projections 3a, 3a are formed on the outer periphery, and the plate-shaped arcuate plate-to-plate connecting metal fitting 7 having a tapered dovetail groove 7a that fits into the dovetail is used. A structure has been developed in which the arcuate plates 3 and 3 are connected while being pulled together by fitting the connecting protrusions 3a and 3a into the dovetail groove 7a and sliding the arcuate plate-to-plate connecting fitting 7 (for example, Patent Documents). 2).

一方、地中に建て込まれる既製杭1には、杭周方向に間隔を置いて杭軸方向に向けた複数のPC緊張材を備え、このPC緊張材によってコンクリート部にプレストレスが導入されたものが使用されている。   On the other hand, the ready-made pile 1 built in the ground is provided with a plurality of PC tendons oriented in the pile axial direction at intervals in the pile circumferential direction, and prestress is introduced into the concrete portion by the PC tendons. Things are used.

また、このような杭の継手部構造では、地震等によって継手部分に大きなせん断力が作用した場合、ボルト、弧状プレート及び連結金具などの両端部金具2,2を接合させるための部材は、軸方向に直交する方向のせん断耐力が杭本体部に比べて小さいため、当該せん断力により変形が生じ破損する虞がある。   Moreover, in such a joint structure of a pile, when a large shearing force is applied to the joint part due to an earthquake or the like, a member for joining the two end metal parts 2 and 2 such as a bolt, an arc plate, and a connecting metal Since the shear strength in the direction perpendicular to the direction is smaller than that of the pile main body, there is a risk that the shear force causes deformation and breakage.

そこで、互いに接合される両端部金具の接合端面に環状凹溝状のせん断リング嵌め込み部を設けるとともに、このせん断リング嵌め込み部に嵌め込まれ、両端部金具の接合端面間に跨らせて介在される環状のせん断リングを備え、継手部のせん断耐力を強化したものが開発されている(例えば特許文献3)。   Therefore, an annular groove-shaped shear ring fitting portion is provided on the joining end surface of both end fittings to be joined together, and is fitted into this shear ring fitting portion, and is interposed between the joining end surfaces of the both end fittings. An annular shear ring has been developed that enhances the shear strength of the joint (for example, Patent Document 3).

特開2003−082656号公報Japanese Patent Laid-Open No. 2003-082656 特開2011−089302号公報JP 2011-089302 A 特開2005−213947号公報JP 2005-213947 A

しかしながら、上述の如き従来の技術では、連結手段を両端部金具の外周面間に跨らせて杭間を連結する構造であるため、接合した際に両端部金具の外周部間が互いに離反した状態にあると連結手段による連結を阻害する虞があることから、両端部金具の寸法を厳密に管理、即ち、端部金具をプレストレス導入時の変形等を考慮した上で、端部金具の杭軸方向寸法公差を内周側部が外周側部に対し杭軸方向で突出しないように管理する必要があった。   However, in the conventional technique as described above, the connection means is straddled between the outer peripheral surfaces of the both end metal parts, and the piles are connected to each other, so that the outer peripheral parts of the both end metal parts are separated from each other when they are joined. Since there is a possibility that the connection by the connecting means may be hindered in the state, the dimensions of the end fittings are strictly controlled, i.e., considering the deformation of the end fittings when prestress is introduced, etc. It was necessary to manage the pile axial dimension tolerance so that the inner peripheral side did not protrude in the pile axial direction relative to the outer peripheral side.

一方、せん断リングは、せん断リング嵌め込み部に対して隙間なく嵌り込むことが望ましいところ、端部金具の杭軸方向寸法公差を内周側部が外周側部に対し杭軸方向で突出しないように管理、即ち、端部金具内周側部の杭軸方向寸法公差を杭軸方向内側にのみ許容する為、せん断リングとせん断リング嵌め込み部との間に隙間が生じる虞があり、更には、せん断リングの断面を当該隙間の発生を見越して大きくせざるを得ず、それに伴うせん断リング嵌め込み部による端部金具の断面欠損を考慮し、各端部金具の杭軸方向の厚みも厚くしなければならない為、端部金具の重量が嵩むという問題があった。   On the other hand, it is desirable to fit the shear ring without any gap to the fitting part of the shear ring, so that the dimensional tolerance in the pile axial direction of the end fitting is set so that the inner peripheral side does not protrude from the outer peripheral side in the pile axial direction. Management, i.e., because the tolerance in the axial direction of the pile on the inner peripheral side of the end fitting is allowed only on the inner side in the axial direction of the pile, there is a risk that a gap will be formed between the shear ring and the fitting part of the shear ring. The cross section of the ring must be enlarged in anticipation of the occurrence of the gap, and the thickness of each end fitting in the pile axis direction must be increased in consideration of the cross-sectional defect of the end fitting due to the shear ring fitting part. Therefore, there is a problem that the weight of the end fitting increases.

そこで、本発明はこのように従来の問題に鑑み、効率よく高曲げ耐力及び高せん断耐力を発揮し、且つ、せん断リングとせん断リング嵌め込み部との隙間の発生を防止し、その分のせん断リング嵌め込み部による端部金具の断面欠損を小さくすることができ、更には、少ない部材を使用し、低コストでかつ作業性がよい杭の継手部構造の提供を目的としてなされたものである。   Thus, in view of the conventional problems, the present invention efficiently exhibits high bending strength and high shear strength, and prevents the occurrence of a gap between the shear ring and the shear ring fitting portion, and the corresponding shear ring. The cross-sectional defect | deletion of the edge part metal fitting by an insertion part can be made small, and also it was made | formed for the purpose of provision of the joint part structure of a pile which uses few members and is low-cost and good workability | operativity.

上述の如き従来の問題を解決するための請求項1に記載の発明の特徴は、互いに連結しようとする各杭の接合端部にそれぞれ端部金具を備え、その両端部金具に跨らせてその外周に巻き付け配置に嵌め合わされる複数の弧状プレートと、互いに隣り合う前記弧状プレートの端部外面間に跨らせて固定することによって該弧状プレート間を連結する板状の弧状プレート間連結金具とを備え、前記両端部金具の外周にフランジ状の凸条を一体に備えるとともに前記弧状プレートの内周面に前記両端部金具の凸条が嵌り合う凹溝を備え、該凹溝は、その開口部側が広幅となったテーパー状となっているとともに、前記凸条は、その断面が前記両端部金具が重なり合った状態で前記凹溝のテーパー状に嵌まり合う形状となっており、前記凹溝内に前記両端部金具の凸条を嵌合させて前記弧状プレートを前記両端部金具の外周に嵌め合わされて杭間が連結されている杭の無溶接継ぎ手において、前記両端部金具はその接合端面の内周側部が外周側部に対して杭軸方向で突出しない形状に形成されており、前記両端部金具の接合端面の一方又は双方に環形凹溝状のせん断リング嵌め込み部が前記端部金具の外周側に片寄せて配置されており、該せん断リング嵌めこみ部に前記端部金具の接合端面間に跨らせて環状のせん断リングが介在されており 前記該弧状プレート間連結金具には、上下の何れか側が狭いテーパー状をなし、横断面が蟻溝状をしたテーパー蟻溝を備え、 互いに隣り合う前記弧状プレートの各端部外面には、前記テーパー蟻溝に嵌り合うテーパー状の蟻型を縦割りにした形状の弧状プレート間連結用突起をそれぞれ備え、該両弧状プレート間連結用突起を前記テーパー蟻溝に挿入させることによって互いに隣り合う弧状プレート間を前記弧状プレート間連結金具にて連結させ、 前記弧状プレート間連結金具の両端部を互いに隣り合う弧状プレートにネジ止めしたことを特徴としてなる杭の継手部構造にある。 The feature of the invention according to claim 1 for solving the conventional problems as described above is that each joint end of each pile to be connected to each other is provided with an end fitting, and straddling the both end fittings. A plurality of arc-shaped plates fitted in a winding arrangement on the outer periphery, and a plate-shaped arc-shaped plate-to-plate connecting bracket that connects between the arc-shaped plates by fixing them across the outer surface of the end portions of the adjacent arc-shaped plates. A flange-shaped ridge is integrally provided on the outer periphery of the both-end metal fittings, and a groove is provided on the inner peripheral surface of the arc-shaped plate to fit the ridges of the both-end metal fittings. The opening has a tapered shape with a wide width, and the protrusion has a shape in which the cross-section fits into the tapered shape of the recessed groove with the metal fittings on both ends overlapping. In the groove In non-welded joint of stakes said fitted the ridge of the end fitting is fitted an arcuate plate on the outer circumference of said end portion fitting between the piles are connected, said end portion fitting the inner periphery of the joining end face The side portion is formed in a shape that does not protrude in the pile axis direction with respect to the outer peripheral side portion, and an annular groove-like shear ring fitting portion is provided on one or both of the joining end faces of the both end fittings. It is arranged side by side, and an annular shear ring is interposed between the joint end faces of the end fittings in the shear ring fitting portion , A tapered dovetail having a narrow tapered shape on either one of the upper and lower sides and having a dovetail cross-sectional shape is provided on the outer surface of each end of the arc plate adjacent to each other. The shape is divided vertically Each of the arc-shaped plate coupling protrusions is inserted into the tapered dovetail groove so that the adjacent arc-shaped plates are connected to each other by the arc-shaped plate connecting bracket, It is in the joint part structure of the pile characterized by having screwed the both ends of the connection metal fitting to the mutually adjacent arc-shaped plate .

請求項2に記載の発明の特徴は、請求項1の構成に加え、前記端部金具のせん断リング嵌め込み部を、その底面側が接合端面開放部側より幅の狭いテーパー状に形成し、前記せん断リングの内周面及び外周面を上下が前記せん断リング嵌め込み部に対応した形状のテーパー状に形成したことにある。   According to a second aspect of the present invention, in addition to the configuration of the first aspect, the shear ring fitting portion of the end fitting is formed in a tapered shape whose bottom surface side is narrower than the joint end surface opening portion side, and the shear The inner peripheral surface and the outer peripheral surface of the ring are formed in a tapered shape whose upper and lower sides correspond to the shear ring fitting portion.

請求項3に記載の発明の特徴は、請求項1又は2の構成に加え、前記せん断リングは、前記両端部金具の一方側に一体に突設され、該せん断リングを前記両端部金具の他方側に、前記端部金具と一体のせん断リングに対応させた形状に形成したせん断リング嵌め込み部に嵌め合わせたことにある。   According to a third aspect of the present invention, in addition to the structure of the first or second aspect, the shear ring is integrally projected on one side of the both end fittings, and the shear ring is connected to the other end of the both end fittings. On the side, it is fitted to a shear ring fitting portion formed in a shape corresponding to a shear ring integral with the end fitting.

請求項4に記載の発明の特徴は、請求項1〜3の何れか1の構成に加え、前記両せん断リング嵌め込み部の底面に、該底面を部分的に高くした凸部を備えるとともに前記せん断リングの上下の面に前記底面の凸部に対応した位置に該凸部が嵌合する凹部を一体に備え、前記底面の凸部がせん断リング上下面の凹部に嵌合することによってせん断リングと両端部金具の円周方向の相対移動が阻止されることにより、上下に連結される杭間の回転モーメントが伝達されるようにしたことにある。   According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the bottom surface of the two shear ring fitting portions includes a convex portion having a partially raised bottom surface and the shear. The upper and lower surfaces of the ring are integrally provided with a concave portion where the convex portion is fitted at a position corresponding to the convex portion of the bottom surface, and the convex portion of the bottom surface is fitted into the concave portion of the upper and lower surfaces of the shear ring, thereby By preventing relative movement of the metal fittings at both ends in the circumferential direction, a rotational moment between piles connected vertically is transmitted.

本発明に係る杭の継手部構造は、互いに連結される各杭の接合端部にあって互いに接合される端部金具と、該両端部金具の外周面間に跨らせて前記杭間を連結する連結手段と、前記両端部金具の接合端面の一方又は双方に形成された環形凹溝状のせん断リング嵌め込み部に嵌め込まれ、前記端部金具の接合端面間に跨らせて介在させる環状のせん断リングとを備えた杭の継手部構造において、前記両端部金具をその接合端面の内周側部が外周側部に対して杭軸方向で突出しないように形成したことにより、プレストレス導入による端部金具の変形等を考慮した上で、杭接合時に両端部金具の外周側部が互いに離反するのを防止でき、連結手段を確実に両端部金具間に跨らせて両者を連結することができるとともに、両端部金具の外周側部が互いに隙間なく当接した状態で接合端面全体が好適に接合される。   The pile joint structure according to the present invention has an end fitting that is connected to each other at the joint ends of the piles that are connected to each other, and the pile between the outer peripheral surfaces of the two end fittings. A connecting means to be connected, and an annular ring that is fitted in an annular groove-shaped shear ring fitting portion formed on one or both of the joining end faces of the both end fittings, and is interposed between the joining end faces of the end fittings. In the joint part structure of a pile provided with a shear ring, the two end fittings are formed so that the inner peripheral side portion of the joint end face thereof does not protrude in the pile axial direction with respect to the outer peripheral side portion. Taking into account the deformation of the end metal fittings due to, it is possible to prevent the outer peripheral side parts of the two end metal parts from separating from each other at the time of pile joining, and to connect the two by securely straddling the connecting means between the two end metal parts The outer peripheral sides of the metal fittings at both ends Whole joining end face in contact state without gaps can be suitably bonded.

また、本発明において、両端部金具の外周側部が互いに隙間なく当接することに加え、前記せん断リング嵌め込み部を前記端部金具の外周側に片寄せて形成し、前記連結手段の近傍に配置させたことにより、せん断リング嵌め込み部とせん断リングとが確実且つ隙間なく嵌合され、断面積の小さなせん断リングでも効率よくせん断耐力を発揮でき、それに伴って、せん断リング嵌め込み部の断面積も小さくでき、せん断リング嵌め込み部を設けることによる端部金具の断面欠損を小さくできるので端部金具を薄型化できる。   Further, in the present invention, in addition to the outer peripheral side portions of the both end metal fittings being in contact with each other without gaps, the shear ring fitting portion is formed to be shifted to the outer peripheral side of the end metal fitting, and is disposed in the vicinity of the connecting means. By doing so, the shear ring fitting part and the shear ring are securely and without gaps, and even a shear ring with a small cross-sectional area can efficiently exhibit shear strength, and accordingly, the cross-sectional area of the shear ring fitting part is also small. In addition, since the cross-sectional defect of the end fitting due to the provision of the shear ring fitting portion can be reduced, the end fitting can be thinned.

更に、せん断リング及びせん断リング嵌め込み部と連結手段との間の距離を短くしたことによって、端部金具のせん断リング部分における外周面(固定端)回りの回転モーメントを小さくでき、両杭に杭軸方向の引張力が作用した場合であっても、せん断リングとせん断リング嵌め込み部とが隙間なく嵌合した状態が維持されるので、断面積の小さなせん断リングで高いせん断耐力を発揮することができる。   Furthermore, by shortening the distance between the shear ring and the fitting part of the shear ring and the connecting means, the rotational moment around the outer peripheral surface (fixed end) in the shear ring part of the end fitting can be reduced, and the pile shaft is attached to both piles. Even when a tensile force in the direction acts, the state where the shear ring and the shear ring fitting portion are fitted with no gap is maintained, so that a high shear strength can be exhibited with a shear ring having a small cross-sectional area. .

更に、本発明において、前記端部金具の外周部に外向きに突出したフランジ状の凸条を備え、前記連結手段は、前記互いに接合される両端部金具に跨らせてその外周に巻き付け配置に嵌め合わされる複数の弧状プレートを備え、該弧状プレートの内周面部に凹溝を設け、前記弧状プレートを前記両端部金具の外周に嵌め合わせ、前記両凸条を重ね合わせた状態で凹溝に嵌め込むことによって前記両杭間が連結されるようにしたことによって、無溶接で杭を連結でき、溶接の良否によって連結強度が左右されないため、高度の熟練を必要とせず、また、杭連結作業が容易な為、天候等に左右されずに効率よく行うことができる。   Further, in the present invention, the outer peripheral portion of the end fitting is provided with a flange-like protruding protrusion projecting outward, and the connecting means is arranged to be wound around the outer periphery of the two end fittings joined together. A plurality of arc-shaped plates fitted to each other, provided with a concave groove on the inner peripheral surface portion of the arc-shaped plate, the arc-shaped plate fitted to the outer periphery of the both end metal fittings, Since the two piles are connected to each other by fitting them in, the piles can be connected without welding, and the connection strength is not affected by the quality of the welding, so high skill is not required, and the pile connection Since the work is easy, it can be performed efficiently without being influenced by the weather.

更にまた、本発明において、互いに隣り合う前記弧状プレートの端部外面間に跨らせて固定することによって該弧状プレート間を連結させる板状の弧状プレート間連結金具を備え、該弧状プレート間連結金具には、上下の何れか側が狭いテーパー状をなし、横断面が蟻溝状をしたテーパー蟻溝を備え、互いに隣り合う前記弧状プレートの各端部外面には、前記テーパー蟻溝に嵌り合うテーパー状の蟻型を縦割りにした形状の弧状プレート間連結用突起をそれぞれ備え、該両弧状プレート間連結用突起を前記テーパー蟻溝に挿入させることによって互いに隣り合う弧状プレート間を前記弧状プレート間連結金具にて連結され、前記弧状プレート間連結金具の両端部を互いに隣り合う弧状プレートにネジ止めしたことにより、多くのネジ止め作業が不要となり、また、部材が軽量であるため、作業性がよく、短時間で杭間の連結ができる。   Furthermore, in the present invention, a plate-shaped arc-shaped plate-to-plate connection fitting for connecting the arc-shaped plates by connecting the end-shaped outer surfaces of the adjacent arc-shaped plates to each other is provided. The metal fitting is provided with a tapered dovetail having a narrow tapered shape on either the upper or lower side and a dovetail shaped cross section, and the outer surface of each end of the arc-shaped plate adjacent to each other fits the tapered dovetail groove. Each of the arc-shaped plate-shaped connecting projections having a tapered dovetail shape is provided, and the arc-shaped plates are connected to each other by inserting the connecting projections between the arc-shaped plates into the tapered dovetail groove. Many screwing operations are performed by connecting both ends of the arc-shaped plate connecting brackets to the adjacent arc-shaped plates. It becomes unnecessary, and since members are lightweight, workability good, short time may connected between piles.

また、本発明において、前記端部金具のせん断リング嵌め込み部を、その底面側が接合端面開放部側より幅の狭いテーパー状に形成し、前記せん断リングの内周面及び外周面を上下が前記せん断リング嵌め込み部に対応した形状のテーパー状に形成したことにより、上下の杭の端部金具の接合の際に、両端部金具のテーパー溝とせん断リングのテーパー形状によって、両杭間の芯出しが自動的になされ、杭間の高精度の接合が容易となる。   Further, in the present invention, the shear ring fitting portion of the end fitting is formed in a tapered shape whose bottom surface side is narrower than the joint end surface opening portion side, and the inner and outer surfaces of the shear ring are vertically sheared. By forming the taper shape corresponding to the ring fitting part, when joining the end brackets of the upper and lower piles, the centering between the two piles is centered by the tapered groove of the both end brackets and the taper shape of the shear ring. This is done automatically and facilitates high-precision joining between piles.

また、本発明において、前記せん断リングは、前記両端部金具の一方側に一体に突設され、該せん断リングを前記両端部金具の他方側に、前記端部金具と一体のせん断リングに対応させた形状に形成したせん断リング嵌め込み部に嵌め合わせたことにより、せん断リングの形成が、端部金具の成形によってなされるため、製造工程が少なくなり、コスト減となる。   Further, in the present invention, the shear ring is integrally projected on one side of the both end fittings, and the shear ring is made to correspond to the shear ring integral with the end fitting on the other side of the both end fittings. Since the shear ring is formed by molding the end fitting, the manufacturing process is reduced and the cost is reduced.

更に、本発明において、前記両せん断リング嵌め込み部の底面に、該底面を部分的に高くした凸部を備えるとともに前記せん断リングの上下の面に前記底面の凸部に対応した位置に該凸部が嵌合する凹部を一体に備え、前記底面の凸部がせん断リング上下面の凹部に嵌合することによってせん断リングと両端部金具の円周方向の相対移動が阻止されることにより、上下に連結される杭間の回転モーメントが伝達されるようにしたことにより、凹凸部の嵌り合いによって回転方向の相対動作が阻止されることとなり、トルク伝達機能が同時に付加されることとなり、少ない部材によって多機能の継手構造が得られる。   Furthermore, in the present invention, the bottom surface of the two shear ring fitting portions is provided with a convex portion with the bottom surface partially raised, and the convex portion is located on the upper and lower surfaces of the shear ring at a position corresponding to the convex portion of the bottom surface. Are integrally provided with a concave portion, and the convex portion of the bottom surface is fitted into the concave portion of the upper and lower surfaces of the shear ring, thereby preventing relative movement in the circumferential direction of the shear ring and the metal fittings at both ends, thereby Since the rotation moment between the connected piles is transmitted, the relative movement in the rotation direction is prevented by the fitting of the concave and convex portions, and the torque transmission function is added at the same time. A multifunctional joint structure is obtained.

本発明に係る杭の継手部構造の一例を示す横断面図である。It is a cross-sectional view which shows an example of the joint part structure of the pile which concerns on this invention. 同上の縦断面図である。It is a longitudinal cross-sectional view same as the above. 本発明に使用するせん断リングの一例を示す部分破断斜視図である。It is a partially broken perspective view which shows an example of the shear ring used for this invention. 図2中の継手部を示す拡大縦断面図である。FIG. 3 is an enlarged longitudinal sectional view showing a joint portion in FIG. 2. 図1に示す継手部の弧状プレート間連結構造の横断面図である。It is a cross-sectional view of the connection structure between arc-shaped plates of the joint part shown in FIG. 同、正面図である。FIG. 図1に示す無溶接継ぎ手の弧状プレートを示し、(a)は端面図、(b)は端部の平面図である。The arc-shaped plate of a non-welded joint shown in FIG. 1 is shown, (a) is an end view, and (b) is a plan view of the end. 図1に示す無溶接継ぎ手の弧状プレート間連結金具を示し、(a)は正面図、(b)は平面図である。The arc-plate connecting metal fittings of the weldingless joint shown in FIG. 1 are shown, (a) is a front view and (b) is a plan view. 杭接合工程のせん断リング嵌め込み部及びせん断リング部分を示す断面図である。It is sectional drawing which shows the shear ring insertion part and shear ring part of a pile joining process. 本発明の他の実施例を示す部分断面図である。It is a fragmentary sectional view showing other examples of the present invention. 本発明の更に他の実施例を示す部分断面図である。It is a fragmentary sectional view showing other examples of the present invention. 本発明の更に他の実施例を示す部分断面図である。It is a fragmentary sectional view showing other examples of the present invention. 本発明の更に他の実施例を示す部分断面図である。It is a fragmentary sectional view showing other examples of the present invention. 従来の一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the past. 従来の他の例を示す部分斜視図である。It is a fragmentary perspective view which shows the other conventional example.

次に本発明に係る杭の継手部構造の実施の形態を図に示した実施例に基づいて説明する。尚、図中符号1は、本発明に係る杭の継手部構造によって連結されるプレキャストコンクリート杭(以下、杭という)である。   Next, an embodiment of the joint structure of a pile according to the present invention will be described based on the examples shown in the drawings. In addition, the code | symbol 1 in a figure is the precast concrete pile (henceforth a pile) connected with the joint part structure of the pile which concerns on this invention.

杭1は、コンクリート製の杭本体10と、杭本体10の外周を被覆する鋼管11と、杭本体10の杭軸方向端部に一体化させた端部金具12とを備え、各杭間1,1が継手により連結されている。   The pile 1 includes a concrete pile main body 10, a steel pipe 11 covering the outer periphery of the pile main body 10, and an end fitting 12 integrated with a pile axial direction end of the pile main body 10. , 1 are connected by a joint.

この継手部構造は、互いに連結される各杭1,1の接合端部にあって互いに接合される端部金具12,12と、両端部金具12,12の外周面間に跨らせて杭間を連結する連結手段とを備えている。   This joint part structure has piles straddling between the end fittings 12 and 12 to be joined to each other at the joint ends of the piles 1 and 1 connected to each other and the outer peripheral surfaces of both end fittings 12 and 12. Connecting means for connecting the two.

端部金具12は、中空円形板状に形成され、その表面側が接合端面12a,12aとなっている。   The end fitting 12 is formed in a hollow circular plate shape, and the surface side thereof is a joining end face 12a, 12a.

この両端部金具12,12は、両接合端面12a,12aの内周側部12cが外周側部12bに対して杭軸方向で突出しないように形成されている。   The both end metal parts 12 and 12 are formed so that the inner peripheral side part 12c of both joining end surfaces 12a and 12a does not protrude in the pile axis direction with respect to the outer peripheral side part 12b.

この両端部金具12,12は、内周側部12cに比べて外周側部12bの杭軸方向の寸法を厳密に管理するとともに、内周側部12cの寸法公差を杭軸方向内側(両接合端面12a,12aが互いに離反する方向)にのみ許容することによって、両接合端面12a,12aの内周側部12cが外周側部12bに対して杭軸方向で突出しないようにしている。   Both end metal parts 12 and 12 manage the dimension of the outer peripheral side part 12b in the pile axial direction more strictly than the inner peripheral side part 12c, and set the dimensional tolerance of the inner peripheral side part 12c on the inner side in the pile axial direction (both joints). By allowing it only in the direction in which the end surfaces 12a and 12a are separated from each other, the inner peripheral side portion 12c of the joint end surfaces 12a and 12a is prevented from protruding in the pile axis direction with respect to the outer peripheral side portion 12b.

即ち、両端部金具12,12は、両接合端面12a,12aの中央側が杭軸方向内側に凹むように板全体が極々緩やかに湾曲した状態にあって、両端部金具12,12を接合させた際、両端部金具12,12の接合端面外側部12b,12bが常に確実に隙間なく当接し、その状態で両接合端面12a,12a全体が接合されるようになっている。   That is, both end metal parts 12 and 12 are in the state where the whole board was extremely gently curved so that the center side of both joint end faces 12a and 12a was dented inward in the pile axial direction, and both end metal parts 12 and 12 were joined. At this time, the joined end face outer portions 12b and 12b of the both end fittings 12 and 12 always come into contact with each other without any gap, and in this state, both the joined end faces 12a and 12a are joined together.

また、この端部金具12には、杭本体10内に挿通したプレストレス導入用のPC緊張材8,8...の端部が杭周方向に間隔を置いて定着されている。   Further, the end portions of the PC tension members 8, 8... For introducing prestress inserted into the pile body 10 are fixed to the end metal fitting 12 at intervals in the pile circumferential direction.

一方、上下の各接合端面には、端部金具12と同心配置であって、且つ、PC緊張材8,8...の外側に円形リング状配置の凹溝からなるせん断リング嵌め込み部30が互いに整合して向き合う位置に形成されている。   On the other hand, on each of the upper and lower joining end faces, there is a shear ring fitting portion 30 that is concentrically arranged with the end fitting 12 and is formed of a concave groove in a circular ring shape on the outside of the PC tension members 8, 8. They are formed at positions that are aligned and face each other.

このせん断リング嵌め込み部30は、端部金具12の外周側に片寄せて形成し、連結手段の近傍、即ち、接合端面12aの外周側部12bに配置させ、この両せん断リング嵌め込み部30,30内に跨らせた配置に円形リング状のせん断リング31が嵌め合わされている。   The shear ring fitting portion 30 is formed to be shifted to the outer peripheral side of the end fitting 12, and is arranged in the vicinity of the connecting means, that is, the outer peripheral side portion 12b of the joining end face 12a. A circular ring-shaped shear ring 31 is fitted in an arrangement straddling the inside.

各せん断リング嵌め込み部30,30は、それぞれ杭半径方向の断面が、半円状に形成されており、せん断リング31は、図3に示すように、杭半径方向の断面が円形状に形成されている。   Each shear ring fitting portion 30, 30 has a semicircular cross section in the pile radial direction, and the shear ring 31 has a circular cross section in the pile radial direction as shown in FIG. ing.

このように、せん断リング嵌め込み部30は、端部金具12の外周側、即ち、確実且つ隙間なく当接する部分12b側に片寄せて形成されているので、両端部金具12,12を接合させた際、両端部金具内周側部12c,12cの寸法公差の影響を受けずに、両せん断リング嵌め込み部30,30に対して常にせん断リング31が隙間なく嵌合されるので、断面積の小さなせん断リング31でも効率よくせん断耐力を発揮でき、それに伴い、せん断リング嵌め込み部30の断面積も小さくでき、せん断リング嵌め込み部30を設けることによる端部金具の断面欠損を小さくでき、端部金具12の薄型化を図ることができるようになっている。   In this manner, the shear ring fitting portion 30 is formed so as to be shifted to the outer peripheral side of the end fitting 12, that is, the portion 12 b that contacts securely and without a gap, so that the both end fittings 12, 12 are joined. At this time, since the shear ring 31 is always fitted to the both shear ring fitting portions 30 and 30 without a gap without being affected by the dimensional tolerance of the inner peripheral side portions 12c and 12c at both ends, the cross-sectional area is small. The shear ring 31 can also efficiently exhibit the shear strength, and accordingly, the cross-sectional area of the shear ring fitting portion 30 can be reduced, and the cross-sectional defect of the end fitting due to the provision of the shear ring fitting portion 30 can be reduced. The thickness can be reduced.

更に、せん断リング31及びせん断リング嵌め込み部30を連結手段15,15...の近傍に配置し、せん断リング31と連結手段15,15...との間の距離を短くしたことによって、両端部金具12,12のせん断リング31部分における外周面(固定端)回りの回転モーメントを小さくできるので、両杭1,1に杭軸方向の引張力が作用した場合であっても、せん断リング部分の接合端面12a,12a間距離が広がらず、せん断リング31とせん断リング嵌め込み部30,30とが隙間なく嵌合した状態が維持されるので、断面積の小さなせん断リング31で高いせん断耐力を発揮することができる。   Further, the shear ring 31 and the shear ring fitting portion 30 are arranged in the vicinity of the connecting means 15, 15... And the distance between the shear ring 31 and the connecting means 15, 15. Since the rotational moment around the outer peripheral surface (fixed end) in the shear ring 31 portion of the metal fittings 12 and 12 can be reduced, even if a tensile force in the pile axial direction acts on both piles 1 and 1, the shear ring portion Since the distance between the joint end faces 12a and 12a is not wide and the state where the shear ring 31 and the shear ring fitting portions 30 and 30 are fitted with no gap is maintained, the shear ring 31 having a small cross-sectional area exhibits high shear strength. can do.

また、端部金具12,12の接合端面12a,12aには、それぞれ接合端面12aと同心円配置であって、且つ、PC緊張材8,8...の内側に複数のトルク伝達ピン嵌合孔14a,14aが形成され、これにトルク伝達ピン14bが両接合端面12a,12a間に跨って嵌合されている。   Further, the joint end faces 12a, 12a of the end fittings 12, 12 are concentrically arranged with the joint end face 12a, respectively, and a plurality of torque transmission pin fitting holes are provided inside the PC tension members 8, 8. 14a and 14a are formed, and the torque transmission pin 14b is fitted over the joint end faces 12a and 12a.

端部金具12の外周は鋼管11の外周からフランジ状に突出した凸条13が一体に形成されている。この各端部金具の凸条13は、図2、図4に示すように端部金具12,12を重なり合った状態で、後述する該凹溝17のテーパー状に嵌まり合う形状となっており、杭1,1を上下に接合させることによって、両端部金具12,12の外周の凸条13,13が重ね合わされ、全体の断面が先細りテーパー状をした凸条となって接合部の外周に突出されるようになっている。接合部の外周に弧状プレート15が装着されるようになっている。 The outer periphery of the end fitting 12 is integrally formed with a ridge 13 protruding in a flange shape from the outer periphery of the steel pipe 11 . As shown in FIGS. 2 and 4, the protrusion 13 of each end fitting has a shape that fits into a tapered shape of the groove 17 described later in a state where the end fittings 12, 12 are overlapped. By joining the piles 1 and 1 up and down, the protrusions 13 and 13 on the outer periphery of the metal fittings 12 and 12 on both ends are overlapped, and the entire cross-section becomes a taper-shaped protrusion on the outer periphery of the connection part. It is designed to protrude. An arcuate plate 15 is mounted on the outer periphery of the joint.

連結手段は、互いに接合される両端部金具12,12に跨らせてその外周に巻き付け配置に嵌め合わされる複数の弧状プレート15,15...を備え、接合部の外周に弧状プレート15,15...を装着することにより両端部金具12,12間を接合し、それにより杭1,1間を連結するようになっている。   The connecting means includes a plurality of arc-shaped plates 15, 15... Which are wound around the outer periphery of the metal fittings 12 and 12 which are joined to each other and fitted in a winding arrangement, and the arc-shaped plates 15, 15. By attaching 15 ..., both ends metal fittings 12 and 12 are joined, and thereby piles 1 and 1 are connected.

弧状プレート15は、円筒状リングの周方向を3分割した形状をしており、内周面が、端部金具12の外周面と略同曲率の円弧状に形成され、複数(本実施例では、3個)の弧状プレート15,15,15を端部金具12の外周に嵌め合わせた際に、後述する締付時における締め代を吸収する隙間16ができる弧状方向長さに形成されている。   The arc-shaped plate 15 has a shape obtained by dividing the circumferential direction of the cylindrical ring into three parts, and the inner peripheral surface is formed in an arc shape having substantially the same curvature as the outer peripheral surface of the end fitting 12, and a plurality of (in this embodiment, When the three arc-shaped plates 15, 15, 15 are fitted to the outer periphery of the end fitting 12, the arc-shaped length is formed so as to create a gap 16 that absorbs a tightening allowance at the time of tightening described later. .

弧状プレート15の内周面には、互いに連結する杭1,1の端部金具12,12を接合させた際に、接合部外周に突出した互いに重ね合わせた状態の凸条13,13と嵌り合う凹溝17が形成されている。この凹溝17は図2、図4に示すように、互いに重ねあわされた両凸条13,13が嵌まり合うように、開口部が広幅のテーパー状をした断面形状となっている。 When the end fittings 12 and 12 of the piles 1 and 1 connected to each other are joined to the inner peripheral surface of the arc-shaped plate 15, the protruding strips 13 and 13 that protrude from the outer periphery of the joint and overlap with each other are fitted. A matching groove 17 is formed. As shown in FIGS. 2 and 4, the concave groove 17 has a cross-sectional shape in which the opening has a wide taper shape so that the two protruding ridges 13, 13 overlapped with each other.

弧状プレート15の端部外側面には、互いに隣り合う各弧状プレート15,15,15が、端部金具12,12の外周に巻き付け配置に嵌め合された状態で互いに隣り合う弧状プレート15,15の端部外周面に、互いに同一平面上配置となる平面部19,19が形成されている。   The arcuate plates 15, 15 adjacent to each other in a state where the arcuate plates 15, 15, 15 adjacent to each other are wound around the outer periphery of the end fittings 12, 12 are fitted on the outer surface of the end of the arcuate plate 15. Planar portions 19 and 19 are formed on the outer peripheral surface of the end portion, which are arranged on the same plane.

この平面部19,19は、弧状プレート15,15の端部外周面を、後述する弧状プレート間連結用突起20,20を残して平らに削り取った形状となっている。   The flat portions 19 and 19 have a shape in which the outer peripheral surfaces of the end portions of the arc-shaped plates 15 and 15 are scraped flat, leaving the arc-shaped interplate connecting projections 20 and 20 described later.

この両弧状プレート間連結用突起20,20間を、弧状プレート間連結金具21によって互いに引き寄せて連結固定させるようになっているとともに、両弧状プレート間連結用突起20,20の外面が同一平面上に位置することとなるように、外面を平らに形成している。   The arc-shaped plate-to-plate connecting projections 20 and 20 are connected and fixed to each other by the arc-shaped plate-to-plate connecting fitting 21 and the outer surfaces of the arc-shaped plate-to-plate connecting projections 20 and 20 are on the same plane. The outer surface is formed flat so as to be located at the position.

弧状プレート間連結用突起20,20は、互いに隣り合う弧状プレート15,15の端面が向き合った状態で、上側が狭い縦向きのテーパー状をなすとともに横断面が図5に示すように蟻型を縦に2分した半割形状になっている。   The arc-shaped plate-to-plate connecting projections 20 and 20 are formed in a dovetail shape as shown in FIG. 5 while the upper surface has a narrow vertical taper with the end faces of the adjacent arc-shaped plates 15 and 15 facing each other. It has a half-divided shape that is divided in half.

即ち、弧状プレート間連結用突起20は、プレート端部側面20aが杭軸と平行であり、プレート中央側面20bが上側がプレート端側に傾斜したテーパー状となっているとともに、プレート表面側即ち突起根元部より突起表面側が幅広の蟻型に形成されている。これによって、互いに隣り合う弧状プレート間連結用突起20,20一対によって上側がすぼまったテーパー状をなし、その両テーパー面が、突起表面側が幅広の蟻型となるように形成されている。   In other words, the arc-shaped interplate connecting projection 20 has a plate end side surface 20a parallel to the pile axis, and a plate center side surface 20b having a tapered shape with the upper side inclined toward the plate end side. The protrusion surface side is formed in a wide dovetail shape from the root part. As a result, a pair of adjacent arc-shaped plate-to-plate connecting projections 20 and 20 form a tapered shape whose upper side is squeezed, and both tapered surfaces are formed in a wide dovetail shape on the projection surface side.

弧状プレート間連結金具21は、全体が平板状に形成され、その裏面に前述したテーパー状をした蟻型となる一対の弧状プレート間連結用突起20,20が嵌り合うテーパー蟻溝22が形成されており、弧状プレート間連結金具21を弧状プレート間連結用突起20,20の上側からスライドさせてこれをテーパー蟻溝22内に挿入させることによって、テーパー状面に生じる水平方向の分力が両弧状プレート間連結用突起20,20を互いに引き寄せる方向に作用しつつ両者間を連結する。   The arcuate plate-to-plate connection fitting 21 is formed in a flat plate shape as a whole, and a tapered dovetail groove 22 into which the pair of arcuate plate-to-plate connection projections 20 and 20 that are tapered as described above is fitted. By sliding the arcuate plate-to-plate connection fitting 21 from the upper side of the arc-shaped plate-to-plate connection projections 20 and 20 and inserting it into the tapered dovetail groove 22, both horizontal component forces generated on the tapered surface are obtained. The arcuate plate-to-plate connecting projections 20 and 20 are connected to each other while acting in the direction of pulling each other.

このように互いに円形配置の3つの弧状プレート15をその内周面の凹溝17内に上下の端部金具12,12の凸条13,13を嵌め合わせ、各弧状プレート15の端部間を3つの弧状プレート間連結金具21によって連結することによって、3つの弧状プレート15が円筒状に連結されるとともに、3つの弧状プレート間連結金具21によって弧状プレート15間を円周方向に互いに引き寄せることによって、両杭の端部金具12,12の凸条13,13の上下のテーパー面が、弧状プレート15の断面がテーパー状をしている凹溝17のテーパー面に沿って該凹溝17内に押し込まれ、これによって連結金具21,21間が接近される側に引き寄せられて互いに連結される。 In this manner, the three arc-shaped plates 15 arranged in a circle are fitted into the concave grooves 17 on the inner peripheral surface thereof, and the protruding strips 13 of the upper and lower end fittings 12 and 12 are fitted to each other, and the end portions of the respective arc-shaped plates 15 are interposed. By connecting the three arcuate plates 15 with each other by connecting the three arcuate plates, the three arcuate plates 15 are connected in a cylindrical shape, and the arcuate plates 15 are pulled together in the circumferential direction by the three arcuate plates. The upper and lower tapered surfaces of the ridges 13 and 13 of the end fittings 12 and 12 of both piles are formed in the concave groove 17 along the tapered surface of the concave groove 17 in which the cross section of the arc-shaped plate 15 is tapered. By being pushed in, the connection fittings 21 and 21 are pulled toward the approaching side and connected to each other.

弧状プレート間連結金具21の両端部分には、ボルト挿入孔25が表裏に貫通開口されているとともに、弧状プレート15の両端の平面部19に、前述した弧状プレート15,15を引き寄せて連結させた状態で、前記ボルト挿入孔25に整合する位置にネジ穴26が形成され、ボルト挿入孔25に縫い付け用のボルト27を挿入してネジ穴26にねじ込み、締め付けることによって、弧状プレート15,15と弧状プレート間連結金具21とを互いに固定している。   Bolt insertion holes 25 are opened through the front and back of both end portions of the arc-shaped plate connecting metal fitting 21 and the arc-shaped plates 15 and 15 are drawn and connected to the flat portions 19 at both ends of the arc-shaped plate 15. In this state, a screw hole 26 is formed at a position aligned with the bolt insertion hole 25, and a bolt 27 for sewing is inserted into the bolt insertion hole 25, screwed into the screw hole 26, and tightened. And the arcuate plate-to-plate connecting bracket 21 are fixed to each other.

このように構成された杭の継手部構造による杭の連結は、先ず、図9に示すように、下側の杭1を先に建て込み、その上端の端部金具12の接合端面12aの外周側部12bに形成されているせん断リング嵌め込み部30にリング状のせん断リング31を嵌め合わせる。   As shown in FIG. 9, first, the lower pile 1 is built first, and the outer periphery of the joint end face 12a of the end fitting 12 at the upper end thereof is connected to the pile by the joint structure of the pile thus configured. A ring-shaped shear ring 31 is fitted into a shear ring fitting portion 30 formed on the side portion 12b.

また、下側杭の端部金具12の各トルク伝達ピン嵌合孔14a,14a...にトルク伝達ピン14bを嵌合させる。   Further, the torque transmission pins 14b are fitted into the torque transmission pin fitting holes 14a, 14a ... of the end fitting 12 of the lower pile.

次いで、上側の接合端面12aのせん断リング嵌め込み部30内にせん断リング31の上側を嵌め合わせるとともに、上側接合端面のトルク伝達ピン嵌合孔14aにトルク伝達ピン14bを嵌合させて上側の杭1の下端の端部金具12の接合端面12aを、前記下側の杭1の端部金具12の接合端面12aに接合させる。   Next, the upper side of the shear ring 31 is fitted into the shear ring fitting portion 30 of the upper joint end surface 12a, and the torque transmission pin 14b is fitted into the torque transmission pin fitting hole 14a of the upper joint end surface to thereby connect the upper pile 1. The joining end face 12a of the end fitting 12 at the lower end of the lower pile 1 is joined to the joining end face 12a of the end fitting 12 of the lower pile 1.

この時、両端部金具12,12は、内周側部12cに比べて外周側部12bの杭軸方向の寸法を厳密に管理するとともに、内周側部12cの寸法公差を杭軸方向内側(両接合端面12a,12aが互いに離反する方向)にのみ許容することによって、両接合端面12a,12aの内周側部12cが外周側部12bに対して杭軸方向で突出しないようにしており、両端部金具12,12を接合させた際、両端部金具12,12の接合端面外側部12b,12bが常に確実且つ隙間なく当接し、その状態で両接合端面12a,12a全体が接合される。   At this time, both end fittings 12 and 12 strictly manage the dimension of the outer peripheral side part 12b in the pile axial direction as compared with the inner peripheral side part 12c, and the dimensional tolerance of the inner peripheral side part 12c is set to the inner side in the pile axial direction ( By allowing only the joint end faces 12a, 12a to be separated from each other), the inner peripheral side portion 12c of the two joint end faces 12a, 12a is prevented from protruding in the pile axial direction with respect to the outer peripheral side portion 12b. When the both end fittings 12 and 12 are joined, the joining end face outer side portions 12b and 12b of the both end fittings 12 and 12 always come into contact with each other reliably and without gaps, and in this state, both the joining end faces 12a and 12a are joined together.

また、両端部金具12,12を接合させた際、両端部金具12,12の接合端面外側部12b,12bの寸法が厳密に管理され、確実且つ隙間なく当接するように形成されたことに加え、せん断リング嵌め込み部30が、端部金具12の外周面側、即ち、接合端面が互いに当接した状態にある部分12b側に片寄せて形成されているので、両端部金具内周側部12c,12cの寸法公差の影響を受けずに、両せん断リング嵌め込み部30,30に対してせん断リング31が隙間なく嵌合され、接合端面12a,12a間に跨ってせん断リングが介在される。   Further, when the both end metal parts 12 and 12 are joined, the dimensions of the outer end parts 12b and 12b of the both end metal parts 12 and 12 are strictly controlled, and in addition to being formed so as to contact with certainty and without gaps. The shear ring fitting portion 30 is formed so as to be shifted to the outer peripheral surface side of the end fitting 12, that is, the portion 12b side where the joining end faces are in contact with each other, so that both end fitting inner peripheral side portions 12c are formed. , 12c without being affected by the dimensional tolerances, the shear ring 31 is fitted to both the shear ring fitting portions 30, 30 without any gap, and the shear ring is interposed between the joining end faces 12a, 12a.

そして、杭1,1を接合することによって、両端部金具12,12の外周に凸条13,13が重ね合わされて環状に突出し、凸条13,13の外側に3枚の弧状プレート15,15,15をリング状となるように嵌め合わせ、隣り合う弧状プレート15,15の弧状プレート間連結用突起20,20を、弧状プレート間連結金具21をスライドさせてそのテーパー蟻溝22内に嵌合させることにより、弧状プレート15,15間を互いに引き寄せ方向に締め付けて固定する。   And by joining the piles 1, 1, the ridges 13, 13 are overlapped on the outer circumferences of the end fittings 12, 12 and project in an annular shape, and the three arc-shaped plates 15, 15 outside the ridges 13, 13. , 15 are fitted into a ring shape, and the arc-shaped plate connecting projections 20, 20 of the adjacent arc-shaped plates 15, 15 are fitted into the tapered dovetail groove 22 by sliding the arc-shaped plate connecting bracket 21. By doing so, the arcuate plates 15, 15 are fastened and fixed in the pulling direction.

尚、弧状プレート間連結金具21のスライド操作は、油圧ジャッキを使用して行う。   Note that the slide operation of the arc-shaped plate-to-plate connection fitting 21 is performed using a hydraulic jack.

次いで、弧状プレート間連結金具21のボルト挿入孔25に縫い付け用のボルト27を挿入して弧状プレート15,15のネジ穴26にねじ込み、締め付けることによって、弧状プレート15,15と弧状プレート間連結金具21とを互いに固定する。   Next, a bolt 27 for sewing is inserted into the bolt insertion hole 25 of the arc-shaped plate-to-plate connection fitting 21, screwed into the screw hole 26 of the arc-shaped plates 15, 15, and tightened, thereby connecting the arc-shaped plates 15, 15 to the arc-shaped plate. The metal fittings 21 are fixed to each other.

尚、上述した例では、弧状プレートを備えた連結手段を使用した例について説明したが、連結手段はこれに限定されず、例えば、互いに隙間なく連続した両端部金具12,12の外周端縁間を溶接するようにしたもの等であってもよい。   In the above-described example, the example using the connecting means provided with the arc-shaped plate has been described. However, the connecting means is not limited to this, for example, between the outer peripheral edges of the both end fittings 12 and 12 that are continuous without a gap. It may be one that is welded.

また、上述した例では弧状プレート15を、円筒状リングの周方向を3分割した形状としているが、その他の複数に分割にした形状であってもよい。   Moreover, although the arc-shaped plate 15 is made into the shape which divided the circumferential direction of the cylindrical ring into 3 in the example mentioned above, the shape divided | segmented into other plurality may be sufficient.

また、せん断リング嵌め込み部30を断面半円形状に形成したが、せん断リング嵌め込み部30の態様はこれに限定されず、図10に示すように、底面側に比べて端板中央開口幅側が広いテーパー状に形成してもよく、図11に示すように底面側に比べて端板中央開口幅側を同じくした杭半径方向断面を方形の凹溝とし、せん断リング31の同方向断面形状をこれに対応させた方形状としてもよい。   Moreover, although the shear ring fitting part 30 was formed in the cross-sectional semicircle shape, the aspect of the shear ring fitting part 30 is not limited to this, As shown in FIG. 10, the end plate center opening width side is wider than the bottom face side. As shown in FIG. 11, the pile radial direction cross section with the same end plate center opening width side as compared with the bottom face side is formed into a rectangular concave groove, and the shear ring 31 has the same cross sectional shape as shown in FIG. It is good also as a square shape corresponding to.

更に、上述した例では、せん断リング31を端部金具12とは完全な別体として形成した場合を示しているが、図12に示すように、せん断リング31を一方の端部金具12と一体に形成し、他方の端部金具12にのみせん断リング嵌め込み部30を形成した構造であってもよい。   Further, in the above-described example, the case where the shear ring 31 is formed as a completely separate body from the end fitting 12 is shown, but the shear ring 31 is integrated with one end fitting 12 as shown in FIG. The shear ring fitting portion 30 may be formed only on the other end fitting 12.

更にまた、図13に示すように、両せん断リング嵌め込み部30の底面に、底面を部分的に高くした凸部33を備えるとともにせん断リング31の上下の面に底面の凸部33に対応した位置に凸部33が嵌合する凹部32を一体に備え、底面の凸部33がせん断リング上下面の凹部32に嵌合することによってせん断リング31と両端部金具12,12の円周方向の相対移動が阻止されることにより、上下に連結される杭1,1間の回転モーメントが伝達されるようにしてもよい。   Furthermore, as shown in FIG. 13, the bottom surface of both shear ring fitting portions 30 is provided with a convex portion 33 having a partially raised bottom surface, and the upper and lower surfaces of the shear ring 31 correspond to the convex portion 33 on the bottom surface. The concave portion 32 into which the convex portion 33 is fitted is integrally provided, and the convex portion 33 on the bottom surface is fitted into the concave portion 32 on the upper and lower surfaces of the shear ring so that the shear ring 31 and the metal fittings 12 and 12 in the circumferential direction are relatively You may make it transmit the rotational moment between the piles 1 and 1 connected up and down by preventing movement.

また、端部金具12は円形板状の板材をもって構成したものを示しているが、この他、端部金具12の背面と鋼管11との間に鋼製筒からなるスカート部を介在させたもの等、各種の形状のものが使用できる。   Moreover, although the end metal fitting 12 shows what was comprised with the circular plate-shaped board | plate material, the thing which interposed the skirt part which consists of a steel cylinder between the back surface of the end metal fitting 12, and the steel pipe 11 in addition to this. Various shapes can be used.

1 杭
8 PC緊張材
10 杭本体
11 鋼管
12 端部金具
12a 接合端面
12b 外周側部
12c 内周側部
13 凸条
14a トルク伝達ピン
15 弧状プレート
16 隙間
17 凹溝
19 平面部
20 弧状プレート間連結用突起
20a プレート端部側面
20b プレート中央側面
21 弧状プレート間連結金具
22 テーパー蟻溝
25 ボルト挿入孔
26 ネジ穴
27 ボルト
30 せん断リング嵌め込み部
31 せん断リング
32 凸部
33 凹部
DESCRIPTION OF SYMBOLS 1 Pile 8 PC tension material 10 Pile main body 11 Steel pipe 12 End metal fitting 12a Joining end surface 12b Outer peripheral side part 12c Inner peripheral side part 13 Projection 14a Torque transmission pin 15 Arc-shaped plate 16 Gap 17 Groove 19 Flat part 20 Connection between arc-shaped plates Protrusion 20a Plate end side surface 20b Plate center side surface 21 Arc-shaped plate connecting bracket 22 Tapered dovetail groove 25 Bolt insertion hole 26 Screw hole 27 Bolt 30 Shear ring fitting portion 31 Shear ring 32 Convex portion 33 Concavity

Claims (4)

互いに連結しようとする各杭の接合端部にそれぞれ端部金具を備え、その両端部金具に跨らせてその外周に巻き付け配置に嵌め合わされる複数の弧状プレートと、互いに隣り合う前記弧状プレートの端部外面間に跨らせて固定することによって該弧状プレート間を連結する板状の弧状プレート間連結金具とを備え、
前記両端部金具の外周にフランジ状の凸条を一体に備えるとともに前記弧状プレートの内周面に前記両端部金具の凸条が嵌り合う凹溝を備え、
該凹溝は、その開口部側が広幅となったテーパー状となっているとともに、前記凸条は、その断面が前記両端部金具が重なり合った状態で前記凹溝のテーパー状に嵌まり合う形状となっており、前記凹溝内に前記両端部金具の凸条を嵌合させて前記弧状プレートを前記両端部金具の外周に嵌め合わされて杭間が連結されている杭の継手部構造において、
前記両端部金具はその接合端面の内周側部が外周側部に対して杭軸方向で突出しない形状に形成されており、
前記両端部金具の接合端面の一方又は双方に環形凹溝状のせん断リング嵌め込み部が前記端部金具の外周側に片寄せて配置されており、該せん断リング嵌めこみ部に前記端部金具の接合端面間に跨らせて環状のせん断リングが介在されており
前記該弧状プレート間連結金具には、上下の何れか側が狭いテーパー状をなし、横断面が蟻溝状をしたテーパー蟻溝を備え、
互いに隣り合う前記弧状プレートの各端部外面には、前記テーパー蟻溝に嵌り合うテーパー状の蟻型を縦割りにした形状の弧状プレート間連結用突起をそれぞれ備え、
該両弧状プレート間連結用突起を前記テーパー蟻溝に挿入させることによって互いに隣り合う弧状プレート間を前記弧状プレート間連結金具にて連結させ、
前記弧状プレート間連結金具の両端部を互いに隣り合う弧状プレートにネジ止めしたことを特徴としてなる杭の継手部構造。
A plurality of arc-shaped plates that are provided with end fittings at the joint ends of the piles to be connected to each other, are fitted around the outer circumference of the piles and wound around the outer periphery, and the arc-shaped plates adjacent to each other. A plate-shaped arc-shaped plate-to-plate connection fitting that connects between the arc-shaped plates by fixing between the outer surfaces of the end portions; and
Provided with a flange-like ridge integrally on the outer periphery of the both-end metal fittings, and provided with a concave groove in which the ridges of the both-end metal fittings fit on the inner peripheral surface of the arc-shaped plate,
The concave groove has a tapered shape with a wide opening on the opening side, and the convex strip has a shape in which the cross section fits into the tapered shape of the concave groove with the metal fittings on both ends overlapped. In the joint structure of the pile in which the protrusions of the both end metal fittings are fitted in the concave groove, and the arc plate is fitted to the outer periphery of the both end metal fittings and the piles are connected .
The both end metal fittings are formed in a shape in which the inner peripheral side portion of the joining end face does not protrude in the pile axis direction with respect to the outer peripheral side portion,
An annular concave groove-shaped shear ring fitting portion is arranged on one or both of the joining end faces of the both end fittings so as to be shifted to the outer peripheral side of the end fitting, and the end fitting is connected to the shear ring fitting portion. An annular shear ring is interposed between the joint end faces ,
The arc-shaped plate-to-plate connection fitting has a tapered dovetail having a narrow taper on either the upper or lower side, and a transverse cross section having a dovetail shape,
On the outer surface of each end portion of the arc-shaped plates adjacent to each other, each is provided with a projection for connecting between the arc-shaped plates in a shape obtained by vertically dividing a tapered dovetail that fits into the tapered dovetail groove,
By connecting the arc-shaped plate connecting projections between the arc-shaped plates between adjacent arc-shaped plates by inserting the arc-shaped plate connecting projections into the tapered dovetail groove,
A joint structure for a pile, wherein both end portions of the arc-shaped plate-to-plate connection fitting are screwed to adjacent arc-shaped plates .
前記端部金具のせん断リング嵌め込み部を、その底面側が接合端面開放部側より幅の狭いテーパー状に形成し、前記せん断リングの内周面及び外周面を上下が前記せん断リング嵌め込み部に対応した形状のテーパー状に形成した請求項1に記載の杭の継手部構造。   A shear ring fitting portion of the end fitting is formed in a tapered shape whose bottom surface side is narrower than the joint end face opening portion side, and the upper and lower sides of the inner and outer peripheral surfaces of the shear ring correspond to the shear ring fitting portion. The pile joint structure according to claim 1, which is formed in a tapered shape. 前記せん断リングは、前記両端部金具の一方側に一体に突設され、該せん断リングを前記両端部金具の他方側に、前記端部金具と一体のせん断リングに対応させた形状に形成したせん断リング嵌め込み部に嵌め合わせた請求項1又は2に記載の杭の継手部構造。   The shear ring is integrally projected on one side of the both end fittings, and the shear ring is formed on the other side of the both end fittings in a shape corresponding to the shear ring integral with the end fitting. The pile joint structure according to claim 1 or 2, which is fitted to a ring fitting portion. 前記両せん断リング嵌め込み部の底面に、該底面を部分的に高くした凸部を備えるとともに前記せん断リングの上下の面に前記底面の凸部に対応した位置に該凸部が嵌合する凹部を一体に備え、
前記底面の凸部がせん断リング上下面の凹部に嵌合することによってせん断リングと両端部金具の円周方向の相対移動が阻止されることにより、上下に連結される杭間の回転モーメントが伝達されるようにした請求項1〜3の何れか1に記載の杭の継手部構造。
The bottom of each of the shear ring fitting portions is provided with a convex portion having a partially raised bottom surface, and a concave portion into which the convex portion is fitted at a position corresponding to the convex portion of the bottom surface on the upper and lower surfaces of the shear ring. Ready for one,
When the convex portion on the bottom surface is fitted into the concave portion on the upper and lower surfaces of the shear ring, the relative movement in the circumferential direction between the shear ring and the metal fittings on both ends is prevented, so that the rotational moment between the piles connected vertically is transmitted. The joint part structure of a pile according to any one of claims 1 to 3, wherein the structure is a pile.
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