JP2016180249A - Pile head part joining method and pile head part support structure for precast concrete member - Google Patents

Pile head part joining method and pile head part support structure for precast concrete member Download PDF

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JP2016180249A
JP2016180249A JP2015061072A JP2015061072A JP2016180249A JP 2016180249 A JP2016180249 A JP 2016180249A JP 2015061072 A JP2015061072 A JP 2015061072A JP 2015061072 A JP2015061072 A JP 2015061072A JP 2016180249 A JP2016180249 A JP 2016180249A
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pile
precast concrete
side support
pile head
concrete member
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JP6032625B2 (en
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友邦 中村
Tomokuni Nakamura
友邦 中村
奨 川俣
Susumu Kawamata
奨 川俣
由利夫 大野
Yurio Ono
由利夫 大野
肇 棚橋
Hajime Tanahashi
棚橋  肇
和治 大岡
Kazuharu Ooka
和治 大岡
憲司 石黒
Kenji Ishiguro
憲司 石黒
渡部 健
Takeshi Watabe
健 渡部
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Penta Ocean Construction Co Ltd
Maruei Concrete Industry Co Ltd
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Penta Ocean Construction Co Ltd
Maruei Concrete Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a pile head part joining method for a precast concrete member by which positioning of a pile head part and a precast concrete member can be easily performed, construction cost can be reduced and a construction period can be shortened, and a pile head part support structure therefor.SOLUTION: In a pile head joining method, by using joint support members 3 each comprising a member-side support tool 15 fixed to a precast concrete member 2 and a pile-side support tool 16 capable of relatively moving in axis and radial directions of a pile to the member-side support tool 15 and being fixed to the outer peripheral surface of a pile head part, a relative position of the pile head part 1a and the precast concrete member 2 is adjusted. Meanwhile, the member-side support tool 15 and the pile-side support tools 16 are rigidly joined after adjusting relative positions of the member-side support tools 15 and the pile-side support tools 16, to make the pile head part 1a support the precast concrete member 2 while interposing the joint support members 3.SELECTED DRAWING: Figure 5

Description

本発明は、主に複数の杭に梁を支持させた桟橋等の構造物の構築に際し、当該梁を構成するプレキャストコンクリート部材と杭頭部とを接合する際にプレキャストコンクリート部材を杭頭部に支持させるプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造に関する。   In the construction of a structure such as a pier in which a beam is supported by a plurality of piles, the present invention mainly applies the precast concrete member to the pile head when joining the precast concrete member and the pile head constituting the beam. The present invention relates to a pile head joining method of a precast concrete member to be supported and a pile head support structure.

従来、桟橋等の複数の杭に梁を支持させた構造物は、水底等に各杭を打設した後、隣接するこれら杭間に鉄骨の架設や鉄筋の配筋等を行うとともに、杭に支持させた支保工を利用して杭間に型枠を形成し、コンクリートを現場打ちすることによって梁を形成するとともに梁と杭頭部とを接合していた。   Conventionally, a structure with a beam supported by multiple piles such as a pier, after placing each pile on the bottom of the water, etc., constructing a steel frame between these adjacent piles, arranging reinforcing bars, etc. Forms were formed between the piles using the supported support works, and beams were formed by casting the concrete in the field, and the beams and the pile heads were joined.

しかしながら、このような工法では、梁を現場打ちコンクリートで形成するため、各作業を行うための作業足場や支保工の設置、鉄筋・鉄骨の配置、型枠の組立・解体、コンクリートの打設・養生等の全ての作業を施工現場で行わなければならず、海象・気象条件の影響が大きいとともに、工期が長期化するという問題があった。   However, in such a construction method, the beam is made of cast-in-place concrete, so installation of work scaffoldings and supporters for each work, placement of reinforcing bars and steel frames, assembly / disassembly of formwork, placement of concrete, All work such as curing had to be performed at the construction site, and there was a problem that the influence of sea conditions and weather conditions was great and the construction period was prolonged.

そこで、このような問題を鑑み、従来では、梁を構成する1又は複数のプレキャストコンクリート部材を予め陸上の工場又は製作ヤードで製作し、それを施工現場に搬送し、クレーン船や陸上に設置されたクレーンによって吊り上げて杭頭部に当該プレキャストコンクリート部材を設置し、その状態で杭頭部とプレキャストコンクリート部材との間にコンクリートを打設することにより杭頭部に梁を接合させるようにした工法が用いられている(例えば、特許文献1を参照)。   In view of such problems, conventionally, one or a plurality of precast concrete members constituting a beam are manufactured in advance in an on-site factory or production yard, which is transported to a construction site and installed on a crane ship or on land. The crane is lifted by a crane and the precast concrete member is installed on the pile head, and the concrete is placed between the pile head and the precast concrete member in that state, so that the beam is joined to the pile head. Is used (see, for example, Patent Document 1).

この種の工法においては、プレキャストコンクリート部材に杭頭部が挿入される貫通孔を設けておくとともに、貫通孔の内周面より鉄骨等の支持部材を突出させておき、この鉄骨等の支持部材の下面を杭上面又は杭外周面に突設されたブラケットによって受けてプレキャストコンクリート部材を杭に仮支持させ、その状態で鉄筋の配筋・接続を行うとともに、貫通孔内にコンクリートを打設するようにしていた。   In this type of construction method, a pre-cast concrete member is provided with a through-hole into which a pile head is inserted, and a support member such as a steel frame is projected from the inner peripheral surface of the through-hole. The lower surface of the pile is received by a bracket projecting on the upper surface of the pile or the outer peripheral surface of the pile, and the precast concrete member is temporarily supported on the pile. It was like that.

特開平8−100464号公報Japanese Patent Laid-Open No. 8-100144

しかしながら、上述の如き従来の技術では、プレキャストコンクリート部材の支持部材を杭上面部又は杭頭部外周面に固定されたブラケットで支持する構造であるので、プレキャストコンクリート部材を所望の高さに設置するためには、各杭の支持部材を支持する杭上面又はブラケットの高さが一致してなければならず、その為、各杭又はブラケットを高い精度で設置する必要があり、作業が煩雑で工費及び工期が増大するという問題があった。   However, in the conventional technology as described above, since the support member of the precast concrete member is supported by a bracket fixed to the upper surface portion of the pile or the outer peripheral surface of the pile head, the precast concrete member is installed at a desired height. In order to achieve this, the pile upper surface or bracket height that supports the support member of each pile must match, and therefore, it is necessary to install each pile or bracket with high accuracy, which is complicated and costly. In addition, there is a problem that the construction period increases.

また、このようなプレキャストコンクリート部材と杭頭部との接合においては、杭頭モーメントに対する埋め込み長の不足を補うため、プレキャスト部材に埋設された鉄筋を直接又は固定用プレートを介して杭頭部に溶接等によって接合することが要求される事例が多い。   Moreover, in joining such a precast concrete member and a pile head, in order to compensate for the shortage of the embedding length with respect to the pile head moment, the reinforcing bar embedded in the precast member is directly or via a fixing plate to the pile head. There are many cases where joining is required by welding or the like.

その場合、従来の技術では、プレキャストコンクリート部材に埋設された鉄筋の設置位置が支持部材との相対位置によって決定されるため、各杭又はブラケットには、鉄筋位置を考慮してより高い精度での設置が要求されるという問題があり、また、設計変更等に柔軟に対応出来難いという問題があった。   In that case, in the conventional technique, since the installation position of the reinforcing bar embedded in the precast concrete member is determined by the relative position to the support member, each pile or bracket has a higher accuracy in consideration of the reinforcing bar position. There is a problem that installation is required, and there is a problem that it is difficult to respond flexibly to design changes.

そこで、本発明は、このような従来の問題に鑑み、杭頭部とプレキャストコンクリート部材との位置合わせを容易に行え、工費の削減及び工期の短縮を図ることができるプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造の提供を目的としてなされたものである。   Therefore, in view of such a conventional problem, the present invention can easily align the pile head and the precast concrete member, and can reduce the construction cost and the construction period. The purpose is to provide a joining method and a pile head support structure.

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、杭頭部にプレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填し、前記杭頭部と前記プレキャストコンクリート部材とを接合するプレキャストコンクリート部材の杭頭部接合方法において、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定可能な杭側支持具とからなる接合支持部材を使用し、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具と前記杭側支持具との相対位置を調整した後、該杭側支持具と前記部材側支持具とを剛結合し、前記杭頭部に前記接合支持部材を介して前記プレキャストコンクリート部材を支持させるプレキャストコンクリート部材の杭頭部接合方法にある。   The feature of the invention according to claim 1 for solving the conventional problems as described above is that a precast concrete member is supported on a pile head and concrete is placed between the pile head and the precast concrete member in that state. In the pile head joining method of a precast concrete member that joins the pile head and the precast concrete member, a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member And, in a state where the position of the precast concrete member with respect to the pile head is fixed, relative movement is possible in the pile axial direction and the pile radial direction with respect to the member side support tool, and is fixed to the outer peripheral surface of the pile head. Use a joint support member consisting of a possible pile side support tool, the relative position of the pile head and the precast concrete member And adjusting the relative position between the member-side support tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool to the pile head. It exists in the pile head joining method of the precast concrete member which supports the said precast concrete member via a member.

請求項2に記載の発明の特徴は、請求項1の構成に加え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具に対する前記杭側支持具の相対位置を調整した後に、前記杭側支持具を前記杭頭部に固定することにある。   The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the relative position of the pile head and the precast concrete member is adjusted, and the relative of the pile side support to the member side support After adjusting a position, it exists in fixing the said pile side support tool to the said pile head.

請求項3に記載の発明の特徴は、請求項1の構成に加え、前記杭側支持具を前記杭頭部の外周に予め固定しておき、その状態で前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整しつつ、前記部材側支持具と前記杭側支持具との相対位置を調整し、しかる後、該杭側支持具と前記部材側支持具とを剛結合することにある。   The invention according to claim 3 is characterized in that, in addition to the structure of claim 1, the pile-side support is fixed in advance to the outer periphery of the pile head, and the pile head and the precast concrete member are in that state. The relative position between the member side support tool and the pile side support tool is adjusted while adjusting the relative position between the pile side support tool and the member side support tool. .

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、前記プレキャストコンクリート部材を吊り持ち支持する吊り枠を使用し、該吊り枠には、前記クレーンに吊り持ちされる吊り枠本体と、該吊り枠本体下に配置した前記プレキャストコンクリート部材を前記吊り枠本体に支持させる吊り具と、前記吊り枠本体の前記杭挿入部に整合させた位置に下向きに突設された高さ調整可能な支持脚部とを備え、前記支持脚部を前記杭頭部上面に支持させ、前記吊り枠を前記杭に支持させるとともに、前記支持脚部の高さを調整することにより前記杭頭部と前記プレキャストコンクリート部材との相対高さを調整することにある。   According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame is suspended from the crane. A hanging frame body to be held, a hanging tool for supporting the precast concrete member disposed below the hanging frame body on the hanging frame body, and a position aligned with the pile insertion portion of the hanging frame body. A height-adjustable support leg, the support leg is supported on the top of the pile head, the suspension frame is supported on the pile, and the height of the support leg is adjusted. This is to adjust the relative height between the pile head and the precast concrete member.

上述の如き従来の問題を解決するための請求項5に記載の発明の特徴は、プレキャストコンクリート部材を杭頭部に接合する際、前記杭頭部に前記プレキャストコンクリート部材が接合支持部材を介して仮支持されるようにしたプレキャストコンクリート部材の杭頭部支持構造において、前記接合支持部材は、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定される杭側支持具と、該杭側支持具と前記部材側支持具とを剛結合する結合手段とを備え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整する際に、前記部材側支持具と前記杭側支持具との相対位置が調整でき、且つ、調整後の位置で前記部材側支持具と前記杭側支持具とを剛結合できるようにしたプレキャストコンクリート部材の杭頭部支持構造にある。   The feature of the invention according to claim 5 for solving the conventional problems as described above is that when the precast concrete member is joined to the pile head, the precast concrete member is connected to the pile head via a joining support member. In the pile head support structure of a precast concrete member that is temporarily supported, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile In the state where the position of the precast concrete member with respect to the head is fixed, the pile side that is movable relative to the member-side support tool in the pile axial direction and the pile radial direction and fixed to the outer peripheral surface of the pile head And a coupling means for rigidly coupling the pile-side support tool and the member-side support tool, the phase between the pile head and the precast concrete member. When adjusting the position, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool can be rigidly coupled at the adjusted position. It is in the pile head support structure of the precast concrete member made.

本発明に係るプレキャストコンクリート部材の杭頭部接合方法は、上述したように、杭頭部にプレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填し、前記杭頭部と前記プレキャストコンクリート部材とを接合するプレキャストコンクリート部材の杭頭部接合方法において、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定可能な杭側支持具とからなる接合支持部材を使用し、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具と前記杭側支持具との相対位置を調整した後、該杭側支持具と前記部材側支持具とを剛結合し、前記杭頭部に前記接合支持部材を介して前記プレキャストコンクリート部材を支持させることにより、杭頭部に対するプレキャストコンクリート部材の相対位置調整が杭毎にできるので、杭設置の際に高い精度を必要とせず、その分、杭設置作業が容易となるので工期及び工費を縮減することができる。   The pile head joining method of the precast concrete member according to the present invention, as described above, allows the pile head to support the precast concrete member, and in that state, the concrete is filled between the pile head and the precast concrete member. In the pile head joining method of the precast concrete member for joining the pile head and the precast concrete member, a member-side support fixed to the surface facing the pile head outer peripheral surface of the precast concrete member, In a state where the position of the precast concrete member with respect to the pile head is fixed, it can be moved relative to the member-side support tool in the pile axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head. Using a joint support member comprising a pile side support tool, the pile head and the precast concrete member And adjusting the relative position between the member-side support tool and the pile-side support tool, and then rigidly coupling the pile-side support tool and the member-side support tool to the pile head By supporting the precast concrete member via the joint support member, the relative position adjustment of the precast concrete member with respect to the pile head can be performed for each pile, so high accuracy is not required when installing the pile, Since the pile installation work becomes easy, the construction period and cost can be reduced.

また、本発明において、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具に対する前記杭側支持具の相対位置を調整した後に、前記杭側支持具を前記杭頭部に固定することにより、杭頭部に対するプレキャストコンクリート部材の位置調整が容易となる。   Moreover, in this invention, while adjusting the relative position of the said pile head and the said precast concrete member, after adjusting the relative position of the said pile side support tool with respect to the said member side support tool, the said pile side support tool is said By fixing to the pile head, the position adjustment of the precast concrete member with respect to the pile head becomes easy.

更に、本発明において、前記杭側支持具を前記杭頭部の外周に予め固定しておき、その状態で前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整しつつ、前記部材側支持具と前記杭側支持具との相対位置を調整し、しかる後、該杭側支持具と前記部材側支持具とを剛結合することにより、杭頭部に対するプレキャストコンクリート部材の位置合わせが容易となる。   Furthermore, in this invention, the said pile side support tool is previously fixed to the outer periphery of the said pile head, and the said member side support is adjusted, adjusting the relative position of the said pile head and the said precast concrete member in that state. By adjusting the relative position of the tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool, the precast concrete member can be easily aligned with the pile head. Become.

更にまた、本発明において、前記プレキャストコンクリート部材を吊り持ち支持する吊り枠を使用し、該吊り枠には、前記クレーンに吊り持ちされる吊り枠本体と、該吊り枠本体下に配置した前記プレキャストコンクリート部材を前記吊り枠本体に支持させる吊り具と、前記吊り枠本体の前記杭挿入部に整合させた位置に下向きに突設された高さ調整可能な支持脚部とを備え、前記支持脚部を前記杭頭部上面に支持させ、前記吊り枠を前記杭に支持させるとともに、前記支持脚部の高さを調整することにより前記杭頭部と前記プレキャストコンクリート部材との相対高さを調整することにより、杭にプレキャストコンクリート部材を安定して保持させることができるので、海象・気象条件の影響を受け難く、また、杭毎の杭頭部に対するプレキャストコンクリート部材の位置を容易に調整することができる。   Furthermore, in the present invention, a suspension frame that supports the precast concrete member in a suspended manner is used, and the suspension frame includes a suspension frame body that is suspended by the crane, and the precast that is disposed below the suspension frame body. A suspension tool for supporting a concrete member on the suspension frame main body, and a height adjustable support leg projecting downward at a position aligned with the pile insertion portion of the suspension frame body. The height of the pile head and the precast concrete member is adjusted by adjusting the height of the support leg portion while supporting the portion on the top surface of the pile head and supporting the suspension frame on the pile. By doing so, it is possible to stably hold the precast concrete member on the pile, so that it is not easily affected by sea conditions and weather conditions. The position of the catcher strike concrete member can be easily adjusted.

本発明に係るプレキャストコンクリート部材の杭頭部支持構造は、上述したように、プレキャストコンクリート部材を杭頭部に接合する際、前記杭頭部に前記プレキャストコンクリート部材が接合支持部材を介して仮支持されるようにしたプレキャストコンクリート部材の杭頭部支持構造において、前記接合支持部材は、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定される杭側支持具と、該杭側支持具と前記部材側支持具とを剛結合する結合手段とを備え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整する際に、前記部材側支持具と前記杭側支持具との相対位置が調整でき、且つ、調整後の位置で前記部材側支持具と前記杭側支持具とを剛結合できるようにしたことにより、杭にプレキャストコンクリート部材を接合し、桟橋等の構造物を構築する際、杭頭部に対するプレキャストコンクリート部材の位置調整を容易に行うことができ、その状態でプレキャストコンクリート部材を仮支持させることができる。   In the precast concrete member pile head support structure according to the present invention, as described above, when the precast concrete member is joined to the pile head, the precast concrete member is temporarily supported on the pile head via the joint support member. In the pile head support structure of a precast concrete member, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile head In a state where the position of the precast concrete member with respect to the pile is fixed, the pile side support is movable relative to the member side support in the pile axial direction and the pile radial direction, and is fixed to the outer peripheral surface of the pile head. And a coupling means for rigidly coupling the pile side support and the member side support, the pile head and the precast concrete When adjusting the relative position with the material, the relative position of the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position By allowing rigid connection, the precast concrete member can be easily adjusted to the pile head when the precast concrete member is joined to the pile and a structure such as a pier is constructed. The concrete member can be temporarily supported.

(a)は本発明によって杭頭部にプレキャストコンクリート部材が接合された構造物の一例を示す平面図、(b)は同X−X線断面図である。(A) is a top view which shows an example of the structure by which the precast concrete member was joined to the pile head by this invention, (b) is the XX sectional drawing. (a)は図1中のプレキャストコンクリート部材の一例を示す平面図、(b)は同上の杭挿入部部分を示すY−Y線断面図である。(A) is a top view which shows an example of the precast concrete member in FIG. 1, (b) is a YY sectional view which shows the same pile insertion part part. (a)は図2中の部材側支持具を示す正面図、(b)は同側面図である。(A) is a front view which shows the member side support tool in FIG. 2, (b) is the side view. (a)は同上の杭側支持具を示す正面図、(b)は同側面図である。(A) is a front view which shows the pile side support tool same as the above, (b) is the side view. 本発明に係るプレキャストコンクリート部材の杭頭部接合方法におけるプレキャストコンクリート部材の移送工程を説明するための断面図である。It is sectional drawing for demonstrating the transfer process of the precast concrete member in the pile head joining method of the precast concrete member which concerns on this invention. 同上の吊り枠設置及び高さ調整工程を説明するための断面図である。It is sectional drawing for demonstrating a suspension frame installation same as the above, and a height adjustment process. 図6中の杭挿入部部分を示す拡大断面図である。It is an expanded sectional view which shows the pile insertion part part in FIG. 同上の杭頭部にプレキャストコンクリート部材を支持させた状態を示す拡大平面図である。It is an enlarged plan view which shows the state which supported the precast concrete member on the pile head same as the above. 本発明に係るプレキャストコンクリート部材の杭頭部接合方法の他の実施例を示す断面図である。It is sectional drawing which shows the other Example of the pile head joining method of the precast concrete member which concerns on this invention.

次に、本発明に係るプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造の実施態様を図1〜図8に示した実施例に基づいて説明する。   Next, embodiments of the pile head joining method and the pile head support structure for precast concrete members according to the present invention will be described based on the embodiments shown in FIGS.

尚、本実施例は、桟橋の構築を例に説明し、図中符号Aは桟橋等の構造物、符号Bは水面、符号1は杭、符号2は杭1,1間に架け渡される梁部を構成するプレキャストコンクリート部材である。   In this embodiment, the construction of the pier will be described as an example. In the figure, symbol A is a structure such as a pier, symbol B is a water surface, symbol 1 is a pile, symbol 2 is a beam spanned between the piles 1 and 1. It is the precast concrete member which comprises a part.

この構造物Aの構築に際しては、所定の配置で水底部に複数の杭1,1...を打設した後、予め工場又は陸上の製作ヤードで製造されたプレキャストコンクリート部材2を搬入するとともに、各杭1,1...の杭頭部1aに接合支持部材3を介してプレキャストコンクリート部材2を仮支持させる。   In constructing this structure A, after placing a plurality of piles 1, 1... On the bottom of the water in a predetermined arrangement, the precast concrete member 2 manufactured in advance in a factory or an onshore production yard is carried in. The precast concrete member 2 is temporarily supported by the pile heads 1a of the piles 1, 1.

そして、仮支持させた状態でプレキャストコンクリート部材2と杭頭部1aとの間にコンクリート4を打設することにより、プレキャストコンクリート部材2と杭頭部1aとを接合させて杭1,1...とプレキャストコンクリート部材2からなる梁部とを一体化させる。   Then, by placing concrete 4 between the precast concrete member 2 and the pile head 1a in a temporarily supported state, the precast concrete member 2 and the pile head 1a are joined to each other, the piles 1, 1,. And the beam portion made of the precast concrete member 2 are integrated.

杭1,1...は、円筒状の鋼管によって構成された鋼管杭であって、その上端部が水面B上に突出するように所望の根入れ深さまで水底地盤に打設される。   Pile 1,1 ... is a steel pipe pile comprised by the cylindrical steel pipe, Comprising: The upper end part is driven to a bottom bottom ground to a desired penetration depth so that the upper end part may protrude on the water surface B.

プレキャストコンクリート部材2は、図2に示すように、互いに平行に配置されたプレキャストコンクリート造の一対の主梁部材5,5と、主梁部材5,5間に架け渡されたプレキャストコンクリート造の横梁部材6,6とを備え、主梁部材5,5と横梁部材6,6とが交差する部分に杭頭部1aが挿入される上下に貫通した杭挿入部7が形成されている。   As shown in FIG. 2, the precast concrete member 2 includes a pair of precast concrete main beam members 5 and 5 arranged in parallel to each other and a precast concrete cross beam spanned between the main beam members 5 and 5. The pile insertion part 7 which was provided with the members 6 and 6 and penetrated up and down where the pile head 1a is inserted in the part which the main beam members 5 and 5 and the cross beam members 6 and 6 cross | intersect is formed.

このプレキャストコンクリート部材2は、それぞれ別々に工場で製造されたプレキャストコンクリート造の主梁部材5,5と横梁部材6,6とを桟橋付近の陸上に移送し、そこで主梁部材5と横梁部材6とを型枠兼用連結具8によって連結することにより形成されている。   This precast concrete member 2 transports the precast concrete main beam members 5 and 5 and the transverse beam members 6 and 6 separately manufactured at the factory to the land near the pier, where the main beam member 5 and the transverse beam member 6 are transferred. Are connected by a joint device for mold form 8.

各主梁部材5,5は、鉄筋コンクリート造の直方体状に形成され、その一方の側部の横梁部材6,6と整合する位置に上下及び側面が開口した凹欠状の杭挿入部用凹部7aが設けられ、杭挿入部用凹部7a側を互いに対向させて並列に配置されている。   Each of the main beam members 5 and 5 is formed in a rectangular parallelepiped shape made of reinforced concrete and has a recessed portion 7a for a notched pile insertion portion whose top and bottom and side surfaces are opened at positions aligned with the lateral beam members 6 and 6 on one side thereof. Are provided in parallel, with the recesses 7a for pile insertion portions facing each other.

また、各主梁部材5,5には、長手方向及び短手方向に鉄筋9,9...が埋設され、各鉄筋9,9...には、杭挿入部用凹部7aの内側面に露出する部分に機械継手10が固定されている。   Further, reinforcing bars 9, 9 ... are embedded in the main beam members 5, 5 in the longitudinal direction and the short direction, and the inner side surface of the recess 7a for pile insertion portion is provided in each reinforcing bar 9, 9 ... The mechanical joint 10 is fixed to the exposed part.

各横梁部材6,6は、鉄筋コンクリート造の直方体状に形成され、両主梁部材5,5間であって、杭挿入部用凹部7aに整合した位置に両主梁部材5,5間方向に向けて配置されるようになっている。   Each of the transverse beam members 6 and 6 is formed in a reinforced concrete rectangular parallelepiped shape, and is between the main beam members 5 and 5 in a position aligned with the concave portion 7a for the pile insertion portion. It is arranged to face.

また、各横梁部材6,6には、その長手方向に向けて鉄筋9,9...が埋設され、各鉄筋9,9...の両端、即ち、横梁部材6,6の端面部に機械継手10が固定されている。   Further, in each of the cross beam members 6 and 6, reinforcing bars 9, 9 ... are embedded in the longitudinal direction, and at both ends of each of the reinforcing bars 9, 9 ..., that is, at end surfaces of the cross beam members 6 and 6, respectively. The mechanical joint 10 is fixed.

型枠兼用連結具8は、鋼材をもって構成され、平板状の連結具本体11と、連結具本体11の両側端よりそれぞれ斜め方向に延出し互いに直角を成すよう配置された一対の取付片12,12とを備えている。   The joint for both formwork 8 is made of a steel material, and includes a flat plate-like connector main body 11 and a pair of attachment pieces 12 that extend obliquely from both side ends of the connector main body 11 and are perpendicular to each other. 12.

この型枠兼用連結具8は、各取付片12,12が主梁部材5の杭挿入部用凹部7aの側面側開口縁部と横梁部材6の側面とにそれぞれボルト13,13で固定され、主梁部材5と横梁部材6とを連結するとともに、連結具本体11が杭挿入部7の一部内壁を構成し、コンクリート4打設時の型枠として機能するようになっている。   In this mold and joint coupler 8, each of the mounting pieces 12, 12 is fixed to the side opening edge of the pile insertion portion recess 7a of the main beam member 5 and the side surface of the cross beam member 6 with bolts 13, 13, respectively. The main beam member 5 and the cross beam member 6 are connected to each other, and the connector main body 11 constitutes a partial inner wall of the pile insertion portion 7 and functions as a formwork when placing concrete 4.

尚、この型枠兼用連結具8には、連結具本体11の背面に両取付片12,12間を連結する補強片14,14が一体に突設され、主梁部材5,5と横梁部材6,6とのせん断耐力が強化されている。   In addition, the formwork / connector 8 is integrally provided with reinforcing pieces 14, 14 for connecting the two attachment pieces 12, 12 on the back surface of the connector body 11, so that the main beam members 5, 5 and the horizontal beam members are connected. The shear strength of 6 and 6 is enhanced.

杭挿入部7は、主梁部材5,5の杭挿入部用凹部7aの内側面、両型枠兼用連結具8及び横梁部材6,6の端面により上下に貫通した八角形孔状に形成され、その内部に杭頭部1aが挿入されるようになっている。   The pile insertion part 7 is formed in the shape of an octagonal hole penetrating vertically by the inner surface of the pile insertion part recess 7a of the main beam members 5, 5 and the end faces of both the formwork / connector 8 and the transverse beam members 6, 6. The pile head 1a is inserted into the inside.

この杭挿入部7の内側面、即ち、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面には、接合支持部材3が固定され、この接合支持部材3が杭頭部1aに固定されることでプレキャストコンクリート部材2を杭1,1...に仮支持させる構造になっている。   The joint support member 3 is fixed to the inner side surface of the pile insertion portion 7, that is, the surface facing the outer peripheral surface of the pile head 1a of the precast concrete member 2, and the joint support member 3 is fixed to the pile head 1a. Thus, the precast concrete member 2 is temporarily supported by the piles 1, 1.

このプレキャストコンクリート部材の杭頭部支持構造において、接合支持部材3は、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面に固定される部材側支持具15と、部材側支持具15に対し杭軸方向及び杭径方向で相対移動可能、且つ、杭頭部1aの外周面に固定可能な杭側支持具16とをもって構成されている。   In the pile head support structure of the precast concrete member, the joint support member 3 is fixed to a member side support tool 15 fixed to a surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, and the member side support tool 15 On the other hand, it is comprised with the pile side support 16 which can be relatively moved in a pile axial direction and a pile radial direction, and can be fixed to the outer peripheral surface of the pile head 1a.

また、この接合支持部材3には、部材側支持具15と杭側支持具16とを所望の位置で剛結合するための結合手段を備えている。   In addition, the joining support member 3 includes a coupling means for rigidly coupling the member side support 15 and the pile side support 16 at a desired position.

部材側支持具15は、図3に示すように、鋼板からなる平板状の取付板15aと、取付板15aの表面に側端を垂直に突設させた鋼板からなる平板状の接合板15bとを備え、取付板15aと接合板15bとが平面視T字状を成している。   As shown in FIG. 3, the member-side support 15 includes a flat plate-shaped mounting plate 15a made of a steel plate, and a flat plate-shaped joining plate 15b made of a steel plate whose side ends project vertically from the surface of the mounting plate 15a. The mounting plate 15a and the joining plate 15b form a T shape in plan view.

取付板15aは、接合板15bを挟んで両側にそれぞれ板厚方向に貫通した複数のボルト挿通孔17,17...が形成され、このボルト挿通孔17,17...に通したボルト18をプレキャストコンクリート部材2の杭頭部1a外周面と対向する面、即ち、主梁部材5,5の杭挿入部用凹部7aの内側面、及び横梁部材6,6の端面に埋設されたナット(図示せず)に締め付けることにより部材側支持具15がプレキャストコンクリート部材2の杭頭部1a外周面と対向する面に強固に固定される。   The mounting plate 15a is formed with a plurality of bolt insertion holes 17, 17 ... penetrating in the plate thickness direction on both sides of the joining plate 15b, and bolts 18 passed through the bolt insertion holes 17, 17 ... Nut embedded in the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner surface of the recess 7a for the pile insertion portion of the main beam members 5 and 5 and the end surfaces of the transverse beam members 6 and 6 ( The member-side support 15 is firmly fixed to the surface of the precast concrete member 2 that faces the outer peripheral surface of the pile head 1a.

接合板15bには、上下方向に間隔を置いて板厚方向に貫通した複数のボルト挿通孔19,19と、下端部に配置された水平(短手)に向けた板厚方向に貫通した長穴状の溶接用孔20とが形成されている。   The joining plate 15b has a plurality of bolt insertion holes 19, 19 penetrating in the plate thickness direction at intervals in the vertical direction, and a length penetrating in the plate thickness direction toward the horizontal (short side) disposed at the lower end. A hole-shaped welding hole 20 is formed.

杭側支持具16は、図4に示すように、鋼板からなる平板状に形成され、一方の側端縁が溶接等により杭頭部1aに強固に固定できるようになっている。   As shown in FIG. 4, the pile-side support 16 is formed in a flat plate shape made of a steel plate, and one side edge can be firmly fixed to the pile head 1 a by welding or the like.

この杭側支持具16には、板厚方向に貫通した水平(短手)に向けた長穴状の複数のボルト挿通孔21,21と、上端部に配置された水平(短手)に向けた長穴状の溶接用孔22とが形成されている。   The pile-side support 16 has a plurality of elongated bolt insertion holes 21 and 21 that are horizontally (short) penetrating in the plate thickness direction and horizontally (short) arranged at the upper end. A long hole-like welding hole 22 is formed.

結合手段は、部材側支持具15と杭側支持具16とを剛結合できるものであれば特に限定されないが、本実施例では、接合板15bと杭側支持具16とに貫通させたボルト23の締め付けと溶接用孔20,22を利用した溶接とを併用している。   The coupling means is not particularly limited as long as the member-side support 15 and the pile-side support 16 can be rigidly coupled, but in this embodiment, the bolt 23 penetrated through the joining plate 15b and the pile-side support 16 is used. And the welding using the welding holes 20 and 22 are used in combination.

この接合支持部材3は、部材側支持具15の接合板15bと杭側支持具16とが互いに平板状であるので、杭頭部1aとプレキャストコンクリート部材2との位置調整の際、互いに相対移動可能に重ね合わされ、また、部材側支持具15のボルト挿通孔19,19と杭側支持具16のボルト挿通孔21,21とにボルト23を貫通させることにより部材側支持具15に杭側支持具16を水平方向に摺動可能に支持させることもできる。   Since the joining plate 15b of the member-side support 15 and the pile-side support 16 are flat each other, the joining support member 3 moves relative to each other when the positions of the pile head 1a and the precast concrete member 2 are adjusted. Further, the bolts 23 are passed through the bolt insertion holes 19, 19 of the member side support 15 and the bolt insertion holes 21, 21 of the pile side support 16 so as to be supported by the member side support 15. The tool 16 can also be slidably supported in the horizontal direction.

よって、このプレキャストコンクリート部材の杭頭部支持構造では、杭頭部1aとプレキャストコンクリート部材2との相対位置を調整する際に、部材側支持具15と杭側支持具16との相対位置が調整でき、そして、調整後の位置で部材側支持具15と杭側支持具16とを剛結合し、位置調整した状態を維持することができる。   Therefore, in this pile head support structure of a precast concrete member, when adjusting the relative position of the pile head 1a and the precast concrete member 2, the relative position of the member side support tool 15 and the pile side support tool 16 is adjusted. In addition, the member-side support 15 and the pile-side support 16 can be rigidly connected at the adjusted position, and the adjusted position can be maintained.

次に、上述の如き支持構造を使用したプレキャストコンクリート部材の杭頭部接合方法の具体的な手順を説明する。   Next, a specific procedure of the pile head joining method for the precast concrete member using the support structure as described above will be described.

まず、施工現場付近の陸上において、それぞれ予め工場等で製作されたプレキャストコンクリート造の主梁部材5,5及び横梁部材6,6を施工現場付近の陸上部に搬入し、そこで図2に示すように、各主梁部材5,5及び横梁部材6,6を型枠兼用連結具8によって連結し、プレキャストコンクリート部材2を組み立てる。   First, on the land near the construction site, the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 respectively manufactured in advance at a factory or the like are carried into the land portion near the construction site, as shown in FIG. In addition, the main beam members 5 and 5 and the cross beam members 6 and 6 are connected by the formwork / connector 8 to assemble the precast concrete member 2.

その際、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面、即ち、主梁部材5,5杭挿入部用凹部7aの各内周面と、横梁部材6,6の端面にそれぞれ接合支持部材3の部材側支持具15を取付ける。   At that time, the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner peripheral surface of the main beam members 5 and 5 and the recessed portion 7a for the pile insertion portion, and the end surface of the transverse beam members 6 and 6, respectively The member side support 15 of the support member 3 is attached.

尚、杭側支持具16は、部材側支持具15より取り外された状態にあるか、又は、予め部材側支持具15にボルト締めによって摺動可能に仮固定された状態になっており、部材側支持具15に対し相対移動可能な状態にある。   In addition, the pile side support tool 16 is in a state of being removed from the member side support tool 15, or is in a state of being temporarily fixed to the member side support tool 15 so as to be slidable by bolting in advance. It is in a state in which it can move relative to the side support 15.

次に、図5に示すように、組み上がったプレキャストコンクリート部材2を吊り枠30に取付け、クレーン船又は陸上に設置されたクレーンで吊り上げる。尚、図中符号31は玉掛けワイヤ、符号32はクレーンより繰り出されたワイヤである。   Next, as shown in FIG. 5, the assembled precast concrete member 2 is attached to the suspension frame 30 and is lifted by a crane ship or a crane installed on land. In the figure, reference numeral 31 is a sling wire, and reference numeral 32 is a wire fed from a crane.

使用する吊り枠30は、クレーンに吊り持ちされる吊り枠本体33と、吊り枠本体33下に配置したプレキャストコンクリート部材2を吊り枠本体33に支持させる吊り具34,34...と、吊り枠本体33の杭挿入部7に整合させた位置に下向きに突設された高さ調整可能な支持脚部35,35...とを備え、吊り枠30を介してクレーンでプレキャストコンクリート部材2を吊り持つことができるようにしている。   The suspension frame 30 to be used includes a suspension frame main body 33 suspended by a crane, suspension tools 34, 34 ... for supporting the precast concrete member 2 disposed below the suspension frame main body 33 on the suspension frame main body 33, and suspension. .. Are provided with adjustable height supporting legs 35, 35... Projecting downward at a position aligned with the pile insertion portion 7 of the frame main body 33. So that you can hold it.

各支持脚部35,35...は、吊り枠本体33に上端が固定された伸縮可能な可動部36と、可動部36の下端に固定された下脚部37と、可動部36の高さを調整するための高さ調整用ジャッキ38とを備え、高さ調整用ジャッキ38を操作することにより支持脚部35,35毎に高さ調整ができるようになっている。   Each support leg 35, 35... Has a telescopic movable part 36 whose upper end is fixed to the suspension frame main body 33, a lower leg part 37 fixed to the lower end of the movable part 36, and the height of the movable part 36. And a height adjustment jack 38 for adjusting the height of the support leg 35 and the height of the support leg 35 can be adjusted by operating the height adjustment jack 38.

そして、図5に示すように、クレーン船又は陸上に設置されたクレーンで吊り枠30を介してプレキャストコンクリート部材2を吊り上げて移送し、図6に示すように、各杭1,1...の杭頭部1aが杭挿入部7内に挿入させるとともに、吊り枠30の各支持脚部35,35...を杭頭部1a上面に載置させる。   Then, as shown in FIG. 5, the precast concrete member 2 is lifted and transferred via a suspension frame 30 by a crane ship or a crane installed on land, and as shown in FIG. The pile head 1a is inserted into the pile insertion portion 7 and the supporting leg portions 35, 35... Of the suspension frame 30 are placed on the top surface of the pile head 1a.

この状態では、図6、図7に示すように、吊り枠30が各支持脚部35,35...を介して杭1,1...に支持され、クレーンによって吊り持ちされておらずとも、吊り枠30下に吊り支持されたプレキャストコンクリート部材2が杭挿入部7に杭頭部1aが挿入された状態で安定して保持されている。   In this state, as shown in FIGS. 6 and 7, the suspension frame 30 is supported by the piles 1, 1... Via the respective support legs 35, 35. In both cases, the precast concrete member 2 suspended and supported under the suspension frame 30 is stably held in a state where the pile head 1 a is inserted into the pile insertion portion 7.

このとき、接合支持部材3の杭側支持具16は、未だ杭頭部1a外周面に固定されておらず、接合支持部材3の杭頭部1aに対する相対高さ、即ちプレキャストコンクリート部材2の杭頭部1aに対する相対位置を自由に調整することができる。   At this time, the pile-side support 16 of the joint support member 3 is not yet fixed to the outer peripheral surface of the pile head 1a, and the relative height of the joint support member 3 to the pile head 1a, that is, the pile of the precast concrete member 2 The relative position with respect to the head 1a can be freely adjusted.

そして、この状態で各支持脚部35,35...の高さ調整用ジャッキ38を操作し、各鉄筋9,9...の位置、プレキャストコンクリート部材2の平行度等を合わせつつ杭頭部1aに対するプレキャストコンクリート部材2の高さを調整する。   Then, in this state, the height adjustment jacks 38 of the respective support legs 35, 35... Are operated so that the positions of the respective reinforcing bars 9, 9. The height of the precast concrete member 2 with respect to the part 1a is adjusted.

杭頭部1aに対するプレキャストコンクリート部材2の高さ調整が完了したら、次に、部材側支持具15に対して杭側支持具16を摺動させてその相対位置を調整し、杭側支持具16の側縁部を杭頭部1aの外周面に当接させる。   When the height adjustment of the precast concrete member 2 with respect to the pile head 1a is completed, the pile-side support 16 is then slid with respect to the member-side support 15 to adjust its relative position. Are brought into contact with the outer peripheral surface of the pile head 1a.

そして、その状態で接合板15bと杭側支持具16とに貫通させた結合ボルトを締め付け、且つ、杭側支持具16と部材側支持具15とを溶接用孔20,22を用いて溶接し、接合板15bと杭側支持具16とを剛結合し、更に、杭側支持具16の側縁部を杭頭部1a外周面に溶接する。   Then, in this state, the coupling bolt that is passed through the joining plate 15b and the pile-side support 16 is tightened, and the pile-side support 16 and the member-side support 15 are welded using the welding holes 20 and 22. The joining plate 15b and the pile side support 16 are rigidly connected, and the side edge of the pile side support 16 is welded to the outer peripheral surface of the pile head 1a.

これにより、プレキャストコンクリート部材2は、接合支持部材3を介して杭1,1...に支持された状態となり、プレキャストコンクリート部材2から吊り枠30を取り外すことが可能となる。   Thereby, the precast concrete member 2 will be in the state supported by the pile 1,1, ... via the joining support member 3, and it will become possible to remove the suspension frame 30 from the precast concrete member 2. FIG.

次に、図7中の破線及び図8に示すように、各杭1,1...の杭頭部1aにプレキャストコンクリート部材2の各鉄筋9,9...の位置に合わせて杭側鉄筋40,40...を配筋するとともに、杭頭部1aの外周面に杭側鉄筋40,40...の下面を支持するように鉄筋受けプレート41,41...を溶接し、杭側鉄筋40,40...をプレキャストコンクリート部材2に埋設させた各鉄筋9,9...に機械継手10を介して接続するとともに、杭側鉄筋40,40...を鉄筋受けプレート41に溶接する。   Next, as shown in the broken line in FIG. 7 and FIG. 8, the pile head 1 a of each pile 1, 1... Is aligned with the position of each rebar 9, 9. Reinforcing the reinforcing bars 40, 40 ... and welding the reinforcing bar receiving plates 41, 41 ... so as to support the lower surface of the pile-side reinforcing bars 40, 40 ... on the outer peripheral surface of the pile head 1a. The pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bars 9, 9 ... embedded in the precast concrete member 2 via the mechanical joint 10, and the pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bar receiving plate. Weld to 41.

そして、吊り枠30をプレキャストコンクリート部材2から取り外して撤去し、接合支持部材3を介して各杭1,1...にプレキャストコンクリート部材2を支持させる。   Then, the suspension frame 30 is removed from the precast concrete member 2 and removed, and the precast concrete member 2 is supported by the piles 1, 1.

次に、杭挿入部7の下面側開口を底用型枠材42によって閉鎖し、その状態で各杭挿入部7内にコンクリート4を打設し、そのコンクリート4を養生固化させることにより、杭頭部1aとプレキャストコンクリート部材2とを接合させ、各杭1,1...とプレキャストコンクリート部材2とを一体化させる。   Next, the lower surface side opening of the pile insertion part 7 is closed by the bottom formwork material 42, and the concrete 4 is placed in each pile insertion part 7 in that state, and the concrete 4 is cured and solidified. The head 1a and the precast concrete member 2 are joined, and each pile 1,1 ... and the precast concrete member 2 are integrated.

尚、プレキャストコンクリート部材2を構成する主梁部材5,5と横梁部材6,6とが打設されたコンクリートを介して一体化されるので、図1に示すように、型枠兼用連結具8を取り外すことができ、取り外した型枠兼用連結具8を他に転用することができる。   Since the main beam members 5 and 5 and the cross beam members 6 and 6 constituting the precast concrete member 2 are integrated through the cast concrete, as shown in FIG. Can be removed, and the removed combined mold / connector 8 can be used elsewhere.

そして、図5〜図8に示す一連の作業を必要に応じて繰り返し、杭頭部1aにプレキャストコンクリート部材2からなる梁部を一体化させた構造を成し、特に図示しないが、その梁部上に現場打ちコンクリート又はプレキャスト造によって床版を形成し、桟橋を構築する。   Then, a series of operations shown in FIGS. 5 to 8 are repeated as necessary to form a structure in which the beam portion made of the precast concrete member 2 is integrated with the pile head 1a. A floor slab is formed on the top using cast-in-place concrete or precast, and a pier is constructed.

このように構成されたプレキャストコンクリート部材の杭頭部接合方法では、接合支持部材3を構成する部材側支持具15と杭側支持具16とが互いに相対移動可能であって、両者が結合手段によって剛結合できる構造としたことで、杭1,1...毎に杭頭部1aに対するプレキャストコンクリート部材2の相対位置を調整することができるので、従来技術に比べ杭1,1...設置の精度が緩和され、その分、工費及び工期を縮減することができる。   In the pile head joining method of the precast concrete member configured as described above, the member side support tool 15 and the pile side support tool 16 constituting the joining support member 3 can be moved relative to each other, and both of them can be joined by a coupling means. Because the structure can be rigidly connected, the relative position of the precast concrete member 2 with respect to the pile head 1a can be adjusted for each pile 1, 1. Therefore, the construction cost and construction period can be reduced accordingly.

また、この杭頭部1a接合方法では、図に示す如き吊り枠30を使用することによって、プレキャストコンクリート部材2を各杭1,1...に安定して保持させることができるとともに、支持脚部35,35...毎に高さ調整が可能である。   Moreover, in this pile head 1a joining method, while using the suspension frame 30 as shown in the figure, the precast concrete member 2 can be stably held by each pile 1, 1,. Height adjustment is possible for each part 35, 35 ....

尚、上述の実施例では、プレキャストコンクリート造の主梁部材5,5と横梁部材6,6とを型枠用連結具8で連結させたプレキャストコンクリート部材2を例に説明したが、プレキャストコンクリート部材2の態様はこれに限定されず、例えば、主梁部材5,5又は横梁部材6,6をそれぞれ独立したプレキャストコンクリート部材2として本発明を適用してもよい。   In the above-described embodiment, the precast concrete member 2 in which the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 are connected to each other by the formwork coupler 8 is described as an example. The aspect of 2 is not limited to this, For example, you may apply this invention by making the main beam members 5 and 5 or the cross beam members 6 and 6 into the independent precast concrete member 2, respectively.

また、上述の実施例において、接合支持部材3の部材側支持具15は、プレキャストコンクリート部材2を組み立てる際に取り付けたが、その取付けの時期は、プレキャストコンクリート部材2を杭頭部1aに設置した際、又は杭頭部1aに対するプレキャストコンクリート部材2の相対位置を調整した後でもよい。   Moreover, in the above-mentioned Example, although the member side support tool 15 of the joining support member 3 was attached when assembling the precast concrete member 2, the precast concrete member 2 was installed in the pile head 1a at the time of the attachment. Or after adjusting the relative position of the precast concrete member 2 with respect to the pile head 1a.

更に、上述の実施例では、部材側支持具15に対する杭側支持具16の相対位置を調整した後、杭側支持具16を杭頭部1aの外周に溶接した場合について説明したが、図9に示すように、杭側支持具16を杭頭部1aの外周に予め溶接しておき、その状態で杭頭部1aとプレキャストコンクリート部材2との相対位置を調整しつつ、部材側支持具15と杭側支持具16との相対位置を調整し、しかる後、部材側支持具15と杭側支持具16とを剛結合するようにしてもよい。   Furthermore, although the above-mentioned Example demonstrated the case where after adjusting the relative position of the pile side support tool 16 with respect to the member side support tool 15, the pile side support tool 16 was welded to the outer periphery of the pile head 1a, FIG. The pile side support 16 is welded to the outer periphery of the pile head 1a in advance, and the member side support 15 is adjusted while adjusting the relative position of the pile head 1a and the precast concrete member 2 in this state. It is also possible to adjust the relative position between the pile side support 16 and the member side support 15 and the pile side support 16 after that.

1 杭
2 プレキャストコンクリート部材
3 接合支持部材
5 主梁部材
6 横梁部材
7 杭挿入部
7a 杭挿入部用凹部
8 型枠兼用連結具
9 鉄筋
10 機械継手
11 連結具本体
12 取付片
13 ボルト
14 補強片
15 部材側支持具
15a 取付板
15b 接合板
16 杭側支持具
17 ボルト挿通孔
18 ボルト
19 ボルト挿通孔
20 溶接用孔
21 ボルト挿通孔
22 溶接用孔
30 吊り枠
31 玉掛けワイヤ
32 ワイヤ
33 吊り枠本体
34 吊り具
35 支持脚部
36 可動部
37 下脚部
38 高さ調整用ジャッキ
40 杭側鉄筋
41 鉄筋受けプレート
42 底用型枠材
DESCRIPTION OF SYMBOLS 1 Pile 2 Precast concrete member 3 Joining support member 5 Main beam member 6 Cross beam member 7 Pile insertion part 7a Pile insertion part recessed part 8 Formwork combined connection tool 9 Reinforcement 10 Mechanical joint 11 Connection tool main body 12 Attachment piece 13 Bolt 14 Reinforcement piece 15 member side support 15a mounting plate 15b joint plate 16 pile side support 17 bolt insertion hole 18 bolt 19 bolt insertion hole 20 welding hole 21 bolt insertion hole 22 welding hole 30 hanging frame 31 sling wire 32 wire 33 hanging frame main body 34 Lifting tool 35 Supporting leg part 36 Movable part 37 Lower leg part 38 Height adjusting jack 40 Pile side reinforcing bar 41 Reinforcing bar receiving plate 42 Form material for bottom

本発明は、主に複数の杭に梁を支持させた桟橋等の構造物の構築に際し、当該梁を構成するプレキャストコンクリート部材と杭頭部とを接合する際にプレキャストコンクリート部材を杭頭部に支持させるプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造に関する。   In the construction of a structure such as a pier in which a beam is supported by a plurality of piles, the present invention mainly applies the precast concrete member to the pile head when joining the precast concrete member and the pile head constituting the beam. The present invention relates to a pile head joining method of a precast concrete member to be supported and a pile head support structure.

従来、桟橋等の複数の杭に梁を支持させた構造物は、水底等に各杭を打設した後、隣接するこれら杭間に鉄骨の架設や鉄筋の配筋等を行うとともに、杭に支持させた支保工を利用して杭間に型枠を形成し、コンクリートを現場打ちすることによって梁を形成するとともに梁と杭頭部とを接合していた。   Conventionally, a structure with a beam supported by multiple piles such as a pier, after placing each pile on the bottom of the water, etc., constructing a steel frame between these adjacent piles, arranging reinforcing bars, etc. Forms were formed between the piles using the supported support works, and beams were formed by casting the concrete in the field, and the beams and the pile heads were joined.

しかしながら、このような工法では、梁を現場打ちコンクリートで形成するため、各作業を行うための作業足場や支保工の設置、鉄筋・鉄骨の配置、型枠の組立・解体、コンクリートの打設・養生等の全ての作業を施工現場で行わなければならず、海象・気象条件の影響が大きいとともに、工期が長期化するという問題があった。   However, in such a construction method, the beam is made of cast-in-place concrete, so installation of work scaffoldings and supporters for each work, placement of reinforcing bars and steel frames, assembly / disassembly of formwork, placement of concrete, All work such as curing had to be performed at the construction site, and there was a problem that the influence of sea conditions and weather conditions was great and the construction period was prolonged.

そこで、このような問題を鑑み、従来では、梁を構成する1又は複数のプレキャストコンクリート部材を予め陸上の工場又は製作ヤードで製作し、それを施工現場に搬送し、クレーン船や陸上に設置されたクレーンによって吊り上げて杭頭部に当該プレキャストコンクリート部材を設置し、その状態で杭頭部とプレキャストコンクリート部材との間にコンクリートを打設することにより杭頭部に梁を接合させるようにした工法が用いられている(例えば、特許文献1を参照)。   In view of such problems, conventionally, one or a plurality of precast concrete members constituting a beam are manufactured in advance in an on-site factory or production yard, which is transported to a construction site and installed on a crane ship or on land. The crane is lifted by a crane and the precast concrete member is installed on the pile head, and the concrete is placed between the pile head and the precast concrete member in that state, so that the beam is joined to the pile head. Is used (see, for example, Patent Document 1).

この種の工法においては、プレキャストコンクリート部材に杭頭部が挿入される貫通孔を設けておくとともに、貫通孔の内周面より鉄骨等の支持部材を突出させておき、この鉄骨等の支持部材の下面を杭上面又は杭外周面に突設されたブラケットによって受けてプレキャストコンクリート部材を杭に仮支持させ、その状態で鉄筋の配筋・接続を行うとともに、貫通孔内にコンクリートを打設するようにしていた。   In this type of construction method, a pre-cast concrete member is provided with a through-hole into which a pile head is inserted, and a support member such as a steel frame is projected from the inner peripheral surface of the through-hole. The lower surface of the pile is received by a bracket projecting on the upper surface of the pile or the outer peripheral surface of the pile, and the precast concrete member is temporarily supported on the pile. It was like that.

特開平8−100464号公報Japanese Patent Laid-Open No. 8-100144

しかしながら、上述の如き従来の技術では、プレキャストコンクリート部材の支持部材を杭上面部又は杭頭部外周面に固定されたブラケットで支持する構造であるので、プレキャストコンクリート部材を所望の高さに設置するためには、各杭の支持部材を支持する杭上面又はブラケットの高さが一致してなければならず、その為、各杭又はブラケットを高い精度で設置する必要があり、作業が煩雑で工費及び工期が増大するという問題があった。   However, in the conventional technology as described above, since the support member of the precast concrete member is supported by a bracket fixed to the upper surface portion of the pile or the outer peripheral surface of the pile head, the precast concrete member is installed at a desired height. In order to achieve this, the pile upper surface or bracket height that supports the support member of each pile must match, and therefore, it is necessary to install each pile or bracket with high accuracy, which is complicated and costly. In addition, there is a problem that the construction period increases.

また、このようなプレキャストコンクリート部材と杭頭部との接合においては、杭頭モーメントに対する埋め込み長の不足を補うため、プレキャスト部材に埋設された鉄筋を直接又は固定用プレートを介して杭頭部に溶接等によって接合することが要求される事例が多い。   Moreover, in joining such a precast concrete member and a pile head, in order to compensate for the shortage of the embedding length with respect to the pile head moment, the reinforcing bar embedded in the precast member is directly or via a fixing plate to the pile head. There are many cases where joining is required by welding or the like.

その場合、従来の技術では、プレキャストコンクリート部材に埋設された鉄筋の設置位置が支持部材との相対位置によって決定されるため、各杭又はブラケットには、鉄筋位置を考慮してより高い精度での設置が要求されるという問題があり、また、設計変更等に柔軟に対応出来難いという問題があった。   In that case, in the conventional technique, since the installation position of the reinforcing bar embedded in the precast concrete member is determined by the relative position to the support member, each pile or bracket has a higher accuracy in consideration of the reinforcing bar position. There is a problem that installation is required, and there is a problem that it is difficult to respond flexibly to design changes.

そこで、本発明は、このような従来の問題に鑑み、杭頭部とプレキャストコンクリート部材との位置合わせを容易に行え、工費の削減及び工期の短縮を図ることができるプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造の提供を目的としてなされたものである。   Therefore, in view of such a conventional problem, the present invention can easily align the pile head and the precast concrete member, and can reduce the construction cost and the construction period. The purpose is to provide a joining method and a pile head support structure.

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、杭頭部にプレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填し、前記杭頭部と前記プレキャストコンクリート部材とを接合するプレキャストコンクリート部材の杭頭部接合方法において、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定可能な杭側支持具と、該杭側支持具と前記部材側支持具とを所望の位置で剛結合する結合手段とからなる接合支持部材を使用し、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具と前記杭側支持具との相対位置を調整した後、該杭側支持具と前記部材側支持具とを剛結合し、前記杭頭部に前記接合支持部材を介して前記プレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填するプレキャストコンクリート部材の杭頭部接合方法にある。 The feature of the invention according to claim 1 for solving the conventional problems as described above is that a precast concrete member is supported on a pile head and concrete is placed between the pile head and the precast concrete member in that state. In the pile head joining method of a precast concrete member that joins the pile head and the precast concrete member, a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member And, in a state where the position of the precast concrete member with respect to the pile head is fixed, relative movement is possible in the pile axial direction and the pile radial direction with respect to the member side support tool, and is fixed to the outer peripheral surface of the pile head. a pile side support possible, joint supporting comprising a coupling means for coupling rigidly and with該杭side support said member side support in the desired position Material, and adjusting the relative position of the pile head and the precast concrete member, and after adjusting the relative position of the member side support tool and the pile side support tool, the pile side support tool and the A member-side support is rigidly connected, and the precast concrete member is supported by the pile head via the joint support member, and in that state, the concrete is filled between the pile head and the precast concrete member. in pile head bonding method of precast concrete member.

請求項2に記載の発明の特徴は、請求項1の構成に加え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具に対する前記杭側支持具の相対位置を調整した後に、前記杭側支持具を前記杭頭部に固定することにある。   The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the relative position of the pile head and the precast concrete member is adjusted, and the relative of the pile side support to the member side support After adjusting a position, it exists in fixing the said pile side support tool to the said pile head.

請求項3に記載の発明の特徴は、請求項1の構成に加え、前記杭側支持具を前記杭頭部の外周に予め固定しておき、その状態で前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整しつつ、前記部材側支持具と前記杭側支持具との相対位置を調整し、しかる後、該杭側支持具と前記部材側支持具とを剛結合することにある。   The invention according to claim 3 is characterized in that, in addition to the structure of claim 1, the pile-side support is fixed in advance to the outer periphery of the pile head, and the pile head and the precast concrete member are in that state. The relative position between the member side support tool and the pile side support tool is adjusted while adjusting the relative position between the pile side support tool and the member side support tool. .

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、前記プレキャストコンクリート部材を吊り持ち支持する吊り枠を使用し、該吊り枠には、クレーンに吊り持ちされる吊り枠本体と、該吊り枠本体下に配置した前記プレキャストコンクリート部材を前記吊り枠本体に支持させる吊り具と、前記吊り枠本体のプレキャストコンクリート部材の杭挿入部に整合させた位置に下向きに突設された高さ調整可能な支持脚部とを備え、前記支持脚部を前記杭頭部上面に支持させ、前記吊り枠を前記杭頭部に支持させるとともに、前記支持脚部の高さを調整することにより前記杭頭部と前記プレキャストコンクリート部材との相対高さを調整することにある。 According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame is suspended from a crane. A suspended frame body, a hanging tool for supporting the precast concrete member arranged below the suspended frame body on the suspended frame body, and a downwardly aligned position to a pile insertion portion of the precast concrete member of the suspended frame body A height-adjustable support leg projecting from the top of the pile head, the support leg is supported on the top of the pile head, the suspension frame is supported on the pile head, and the height of the support leg is By adjusting the height, the relative height between the pile head and the precast concrete member is adjusted.

上述の如き従来の問題を解決するための請求項5に記載の発明の特徴は、 プレキャストコンクリート部材を杭頭部に接合する際、前記杭頭部に前記プレキャストコンクリート部材が接合支持部材を介して仮支持されるようにしたプレキャストコンクリート部材の杭頭部支持構造において、前記接合支持部材は、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定される杭側支持具と、該杭側支持具と前記部材側支持具とを所望の位置で剛結合する結合手段とを備え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整する際に、前記部材側支持具と前記杭側支持具との相対位置が調整でき、且つ、調整後の位置で前記部材側支持具と前記杭側支持具とを剛結合できるようにしたプレキャストコンクリート部材の杭頭部支持構造にある。 The feature of the invention according to claim 5 for solving the conventional problem as described above is that when the precast concrete member is joined to the pile head, the precast concrete member is connected to the pile head via a joint support member. In the pile head support structure of a precast concrete member that is temporarily supported, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile In the state where the position of the precast concrete member with respect to the head is fixed, the pile side that is movable relative to the member-side support tool in the pile axial direction and the pile radial direction and fixed to the outer peripheral surface of the pile head A support means, and a coupling means for rigidly connecting the pile side support tool and the member side support tool at a desired position, and the pile head and the precast concrete When adjusting the relative position with the G member, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position It is in the pile head support structure of the precast concrete member that can be rigidly connected.

本発明に係るプレキャストコンクリート部材の杭頭部接合方法は、上述したように、杭頭部にプレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填し、前記杭頭部と前記プレキャストコンクリート部材とを接合するプレキャストコンクリート部材の杭頭部接合方法において、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定可能な杭側支持具と、該杭側支持具と前記部材側支持具とを所望の位置で剛結合する結合手段とからなる接合支持部材を使用し、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具と前記杭側支持具との相対位置を調整した後、該杭側支持具と前記部材側支持具とを剛結合し、前記杭頭部に前記接合支持部材を介して前記プレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填することにより、杭頭部に対するプレキャストコンクリート部材の相対位置調整が杭毎にできるので、杭設置の際に高い精度を必要とせず、その分、杭設置作業が容易となるので工期及び工費を縮減することができる。 The pile head joining method of the precast concrete member according to the present invention, as described above, allows the pile head to support the precast concrete member, and in that state, the concrete is filled between the pile head and the precast concrete member. In the pile head joining method of the precast concrete member for joining the pile head and the precast concrete member, a member-side support fixed to the surface facing the pile head outer peripheral surface of the precast concrete member, In a state where the position of the precast concrete member with respect to the pile head is fixed, it can be moved relative to the member-side support tool in the pile axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head. a pile side support, coupling means and a該杭side support said member side support rigidly attached at a desired position and Tona A joint support member is used to adjust the relative position between the pile head and the precast concrete member, and after adjusting the relative position between the member side support tool and the pile side support tool, the pile side support tool And the member-side support are rigidly connected, and the pile head is supported by the precast concrete member via the joint support member, and in that state, the concrete is placed between the pile head and the precast concrete member. Since the relative position of the precast concrete member with respect to the pile head can be adjusted for each pile by filling the pile head, high accuracy is not required during pile installation, and the pile installation work is facilitated accordingly. Can be reduced.

また、本発明において、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具に対する前記杭側支持具の相対位置を調整した後に、前記杭側支持具を前記杭頭部に固定することにより、杭頭部に対するプレキャストコンクリート部材の位置調整が容易となる。   Moreover, in this invention, while adjusting the relative position of the said pile head and the said precast concrete member, after adjusting the relative position of the said pile side support tool with respect to the said member side support tool, the said pile side support tool is said By fixing to the pile head, the position adjustment of the precast concrete member with respect to the pile head becomes easy.

更に、本発明において、前記杭側支持具を前記杭頭部の外周に予め固定しておき、その状態で前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整しつつ、前記部材側支持具と前記杭側支持具との相対位置を調整し、しかる後、該杭側支持具と前記部材側支持具とを剛結合することにより、杭頭部に対するプレキャストコンクリート部材の位置合わせが容易となる。   Furthermore, in this invention, the said pile side support tool is previously fixed to the outer periphery of the said pile head, and the said member side support is adjusted, adjusting the relative position of the said pile head and the said precast concrete member in that state. By adjusting the relative position of the tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool, the precast concrete member can be easily aligned with the pile head. Become.

更にまた、本発明において、前記プレキャストコンクリート部材を吊り持ち支持する吊り枠を使用し、該吊り枠には、クレーンに吊り持ちされる吊り枠本体と、該吊り枠本体下に配置した前記プレキャストコンクリート部材を前記吊り枠本体に支持させる吊り具と、前記吊り枠本体のプレキャストコンクリート部材の杭挿入部に整合させた位置に下向きに突設された高さ調整可能な支持脚部とを備え、前記支持脚部を前記杭頭部上面に支持させ、前記吊り枠を前記杭頭部に支持させるとともに、前記支持脚部の高さを調整することにより前記杭頭部と前記プレキャストコンクリート部材との相対高さを調整することにより、杭にプレキャストコンクリート部材を安定して保持させることができるので、海象・気象条件の影響を受け難く、また、杭毎の杭頭部に対するプレキャストコンクリート部材の位置を容易に調整することができる。 Furthermore, in the present invention, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame includes a suspension frame body that is suspended by a crane, and the precast concrete disposed below the suspension frame body. A suspension tool for supporting the member on the suspension frame body, and a height-adjustable support leg projecting downward at a position aligned with the pile insertion portion of the precast concrete member of the suspension frame body, The support leg is supported on the top of the pile head, the suspension frame is supported on the pile head, and the height of the support leg is adjusted to adjust the relative height between the pile head and the precast concrete member. By adjusting the height, it is possible to stably hold the precast concrete member on the pile, so it is not easily affected by sea conditions and weather conditions. The position of the precast concrete parts for the pile head of each pile can be easily adjusted.

本発明に係るプレキャストコンクリート部材の杭頭部支持構造は、上述したように、 プレキャストコンクリート部材を杭頭部に接合する際、前記杭頭部に前記プレキャストコンクリート部材が接合支持部材を介して仮支持されるようにしたプレキャストコンクリート部材の杭頭部支持構造において、前記接合支持部材は、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定される杭側支持具と、該杭側支持具と前記部材側支持具とを所望の位置で剛結合する結合手段とを備え、前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整する際に、前記部材側支持具と前記杭側支持具との相対位置が調整でき、且つ、調整後の位置で前記部材側支持具と前記杭側支持具とを剛結合できるようにしたことにより、杭にプレキャストコンクリート部材を接合し、桟橋等の構造物を構築する際、杭頭部に対するプレキャストコンクリート部材の位置調整を容易に行うことができ、その状態でプレキャストコンクリート部材を仮支持させることができる。 As described above, the pile head support structure for a precast concrete member according to the present invention temporarily supports the precast concrete member via the joint support member when the precast concrete member is joined to the pile head. In the pile head support structure of a precast concrete member, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile head In a state where the position of the precast concrete member with respect to the pile is fixed, the pile side support is movable relative to the member side support in the pile axial direction and the pile radial direction, and is fixed to the outer peripheral surface of the pile head. And a coupling means for rigidly coupling the pile side support and the member side support at a desired position, the pile head and the precast When adjusting the relative position with the concrete member, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position By connecting the precast concrete member to the pile and constructing a structure such as a pier, the position of the precast concrete member can be easily adjusted with respect to the pile head. A precast concrete member can be temporarily supported.

(a)は本発明によって杭頭部にプレキャストコンクリート部材が接合された構造物の一例を示す平面図、(b)は同X−X線断面図である。(A) is a top view which shows an example of the structure by which the precast concrete member was joined to the pile head by this invention, (b) is the XX sectional drawing. (a)は図1中のプレキャストコンクリート部材の一例を示す平面図、(b)は同上の杭挿入部部分を示すY−Y線断面図である。(A) is a top view which shows an example of the precast concrete member in FIG. 1, (b) is a YY sectional view which shows the same pile insertion part part. (a)は図2中の部材側支持具を示す正面図、(b)は同側面図である。(A) is a front view which shows the member side support tool in FIG. 2, (b) is the side view. (a)は同上の杭側支持具を示す正面図、(b)は同側面図である。(A) is a front view which shows the pile side support tool same as the above, (b) is the side view. 本発明に係るプレキャストコンクリート部材の杭頭部接合方法におけるプレキャストコンクリート部材の移送工程を説明するための断面図である。It is sectional drawing for demonstrating the transfer process of the precast concrete member in the pile head joining method of the precast concrete member which concerns on this invention. 同上の吊り枠設置及び高さ調整工程を説明するための断面図である。It is sectional drawing for demonstrating a suspension frame installation same as the above, and a height adjustment process. 図6中の杭挿入部部分を示す拡大断面図である。It is an expanded sectional view which shows the pile insertion part part in FIG. 同上の杭頭部にプレキャストコンクリート部材を支持させた状態を示す拡大平面図である。It is an enlarged plan view which shows the state which supported the precast concrete member on the pile head same as the above. 本発明に係るプレキャストコンクリート部材の杭頭部接合方法の他の実施例を示す断面図である。It is sectional drawing which shows the other Example of the pile head joining method of the precast concrete member which concerns on this invention.

次に、本発明に係るプレキャストコンクリート部材の杭頭部接合方法及び杭頭部支持構造の実施態様を図1〜図8に示した実施例に基づいて説明する。   Next, embodiments of the pile head joining method and the pile head support structure for precast concrete members according to the present invention will be described based on the embodiments shown in FIGS.

尚、本実施例は、桟橋の構築を例に説明し、図中符号Aは桟橋等の構造物、符号Bは水面、符号1は杭、符号2は杭1,1間に架け渡される梁部を構成するプレキャストコンクリート部材である。   In this embodiment, the construction of the pier will be described as an example. In the figure, symbol A is a structure such as a pier, symbol B is a water surface, symbol 1 is a pile, symbol 2 is a beam spanned between the piles 1 and 1. It is the precast concrete member which comprises a part.

この構造物Aの構築に際しては、所定の配置で水底部に複数の杭1,1...を打設した後、予め工場又は陸上の製作ヤードで製造されたプレキャストコンクリート部材2を搬入するとともに、各杭1,1...の杭頭部1aに接合支持部材3を介してプレキャストコンクリート部材2を仮支持させる。   In constructing this structure A, after placing a plurality of piles 1, 1... On the bottom of the water in a predetermined arrangement, the precast concrete member 2 manufactured in advance in a factory or an onshore production yard is carried in. The precast concrete member 2 is temporarily supported by the pile heads 1a of the piles 1, 1.

そして、仮支持させた状態でプレキャストコンクリート部材2と杭頭部1aとの間にコンクリート4を打設することにより、プレキャストコンクリート部材2と杭頭部1aとを接合させて杭1,1...とプレキャストコンクリート部材2からなる梁部とを一体化させる。   Then, by placing concrete 4 between the precast concrete member 2 and the pile head 1a in a temporarily supported state, the precast concrete member 2 and the pile head 1a are joined to each other, the piles 1, 1,. And the beam portion made of the precast concrete member 2 are integrated.

杭1,1...は、円筒状の鋼管によって構成された鋼管杭であって、その上端部が水面B上に突出するように所望の根入れ深さまで水底地盤に打設される。   Pile 1,1 ... is a steel pipe pile comprised by the cylindrical steel pipe, Comprising: The upper end part is driven to a bottom bottom ground to a desired penetration depth so that the upper end part may protrude on the water surface B.

プレキャストコンクリート部材2は、図2に示すように、互いに平行に配置されたプレキャストコンクリート造の一対の主梁部材5,5と、主梁部材5,5間に架け渡されたプレキャストコンクリート造の横梁部材6,6とを備え、主梁部材5,5と横梁部材6,6とが交差する部分に杭頭部1aが挿入される上下に貫通した杭挿入部7が形成されている。   As shown in FIG. 2, the precast concrete member 2 includes a pair of precast concrete main beam members 5 and 5 arranged in parallel to each other and a precast concrete cross beam spanned between the main beam members 5 and 5. The pile insertion part 7 which was provided with the members 6 and 6 and penetrated up and down where the pile head 1a is inserted in the part which the main beam members 5 and 5 and the cross beam members 6 and 6 cross | intersect is formed.

このプレキャストコンクリート部材2は、それぞれ別々に工場で製造されたプレキャストコンクリート造の主梁部材5,5と横梁部材6,6とを桟橋付近の陸上に移送し、そこで主梁部材5と横梁部材6とを型枠兼用連結具8によって連結することにより形成されている。   This precast concrete member 2 transports the precast concrete main beam members 5 and 5 and the transverse beam members 6 and 6 separately manufactured at the factory to the land near the pier, where the main beam member 5 and the transverse beam member 6 are transferred. Are connected by a joint device for mold form 8.

各主梁部材5,5は、鉄筋コンクリート造の直方体状に形成され、その一方の側部の横梁部材6,6と整合する位置に上下及び側面が開口した凹欠状の杭挿入部用凹部7aが設けられ、杭挿入部用凹部7a側を互いに対向させて並列に配置されている。   Each of the main beam members 5 and 5 is formed in a rectangular parallelepiped shape made of reinforced concrete and has a recessed portion 7a for a notched pile insertion portion whose top and bottom and side surfaces are opened at positions aligned with the lateral beam members 6 and 6 on one side thereof. Are provided in parallel, with the recesses 7a for pile insertion portions facing each other.

また、各主梁部材5,5には、長手方向及び短手方向に鉄筋9,9...が埋設され、各鉄筋9,9...には、杭挿入部用凹部7aの内側面に露出する部分に機械継手10が固定されている。   Further, reinforcing bars 9, 9 ... are embedded in the main beam members 5, 5 in the longitudinal direction and the short direction, and the inner side surface of the recess 7a for pile insertion portion is provided in each reinforcing bar 9, 9 ... The mechanical joint 10 is fixed to the exposed part.

各横梁部材6,6は、鉄筋コンクリート造の直方体状に形成され、両主梁部材5,5間であって、杭挿入部用凹部7aに整合した位置に両主梁部材5,5間方向に向けて配置されるようになっている。   Each of the transverse beam members 6 and 6 is formed in a reinforced concrete rectangular parallelepiped shape, and is between the main beam members 5 and 5 in a position aligned with the concave portion 7a for the pile insertion portion. It is arranged to face.

また、各横梁部材6,6には、その長手方向に向けて鉄筋9,9...が埋設され、各鉄筋9,9...の両端、即ち、横梁部材6,6の端面部に機械継手10が固定されている。   Further, in each of the cross beam members 6 and 6, reinforcing bars 9, 9 ... are embedded in the longitudinal direction, and at both ends of each of the reinforcing bars 9, 9 ..., that is, at end surfaces of the cross beam members 6 and 6, respectively. The mechanical joint 10 is fixed.

型枠兼用連結具8は、鋼材をもって構成され、平板状の連結具本体11と、連結具本体11の両側端よりそれぞれ斜め方向に延出し互いに直角を成すよう配置された一対の取付片12,12とを備えている。   The joint for both formwork 8 is made of a steel material, and includes a flat plate-like connector main body 11 and a pair of attachment pieces 12 that extend obliquely from both side ends of the connector main body 11 and are perpendicular to each other. 12.

この型枠兼用連結具8は、各取付片12,12が主梁部材5の杭挿入部用凹部7aの側面側開口縁部と横梁部材6の側面とにそれぞれボルト13,13で固定され、主梁部材5と横梁部材6とを連結するとともに、連結具本体11が杭挿入部7の一部内壁を構成し、コンクリート4打設時の型枠として機能するようになっている。   In this mold and joint coupler 8, each of the mounting pieces 12, 12 is fixed to the side opening edge of the pile insertion portion recess 7a of the main beam member 5 and the side surface of the cross beam member 6 with bolts 13, 13, respectively. The main beam member 5 and the cross beam member 6 are connected to each other, and the connector main body 11 constitutes a partial inner wall of the pile insertion portion 7 and functions as a formwork when placing concrete 4.

尚、この型枠兼用連結具8には、連結具本体11の背面に両取付片12,12間を連結する補強片14,14が一体に突設され、主梁部材5,5と横梁部材6,6とのせん断耐力が強化されている。   In addition, the formwork / connector 8 is integrally provided with reinforcing pieces 14, 14 for connecting the two attachment pieces 12, 12 on the back surface of the connector body 11, so that the main beam members 5, 5 and the horizontal beam members are connected. The shear strength of 6 and 6 is enhanced.

杭挿入部7は、主梁部材5,5の杭挿入部用凹部7aの内側面、両型枠兼用連結具8及び横梁部材6,6の端面により上下に貫通した八角形孔状に形成され、その内部に杭頭部1aが挿入されるようになっている。   The pile insertion part 7 is formed in the shape of an octagonal hole penetrating vertically by the inner surface of the pile insertion part recess 7a of the main beam members 5, 5 and the end faces of both the formwork / connector 8 and the transverse beam members 6, 6. The pile head 1a is inserted into the inside.

この杭挿入部7の内側面、即ち、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面には、接合支持部材3が固定され、この接合支持部材3が杭頭部1aに固定されることでプレキャストコンクリート部材2を杭1,1...に仮支持させる構造になっている。   The joint support member 3 is fixed to the inner side surface of the pile insertion portion 7, that is, the surface facing the outer peripheral surface of the pile head 1a of the precast concrete member 2, and the joint support member 3 is fixed to the pile head 1a. Thus, the precast concrete member 2 is temporarily supported by the piles 1, 1.

このプレキャストコンクリート部材の杭頭部支持構造において、接合支持部材3は、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面に固定される部材側支持具15と、部材側支持具15に対し杭軸方向及び杭径方向で相対移動可能、且つ、杭頭部1aの外周面に固定可能な杭側支持具16とをもって構成されている。   In the pile head support structure of the precast concrete member, the joint support member 3 is fixed to a member side support tool 15 fixed to a surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, and the member side support tool 15 On the other hand, it is comprised with the pile side support 16 which can be relatively moved in a pile axial direction and a pile radial direction, and can be fixed to the outer peripheral surface of the pile head 1a.

また、この接合支持部材3には、部材側支持具15と杭側支持具16とを所望の位置で剛結合するための結合手段を備えている。   In addition, the joining support member 3 includes a coupling means for rigidly coupling the member side support 15 and the pile side support 16 at a desired position.

部材側支持具15は、図3に示すように、鋼板からなる平板状の取付板15aと、取付板15aの表面に側端を垂直に突設させた鋼板からなる平板状の接合板15bとを備え、取付板15aと接合板15bとが平面視T字状を成している。   As shown in FIG. 3, the member-side support 15 includes a flat plate-shaped mounting plate 15a made of a steel plate, and a flat plate-shaped joining plate 15b made of a steel plate whose side ends project vertically from the surface of the mounting plate 15a. The mounting plate 15a and the joining plate 15b form a T shape in plan view.

取付板15aは、接合板15bを挟んで両側にそれぞれ板厚方向に貫通した複数のボルト挿通孔17,17...が形成され、このボルト挿通孔17,17...に通したボルト18をプレキャストコンクリート部材2の杭頭部1a外周面と対向する面、即ち、主梁部材5,5の杭挿入部用凹部7aの内側面、及び横梁部材6,6の端面に埋設されたナット(図示せず)に締め付けることにより部材側支持具15がプレキャストコンクリート部材2の杭頭部1a外周面と対向する面に強固に固定される。   The mounting plate 15a is formed with a plurality of bolt insertion holes 17, 17 ... penetrating in the plate thickness direction on both sides of the joining plate 15b, and bolts 18 passed through the bolt insertion holes 17, 17 ... Nut embedded in the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner surface of the recess 7a for the pile insertion portion of the main beam members 5 and 5 and the end surfaces of the transverse beam members 6 and 6 ( The member-side support 15 is firmly fixed to the surface of the precast concrete member 2 that faces the outer peripheral surface of the pile head 1a.

接合板15bには、上下方向に間隔を置いて板厚方向に貫通した複数のボルト挿通孔19,19と、下端部に配置された水平(短手)に向けた板厚方向に貫通した長穴状の溶接用孔20とが形成されている。   The joining plate 15b has a plurality of bolt insertion holes 19, 19 penetrating in the plate thickness direction at intervals in the vertical direction, and a length penetrating in the plate thickness direction toward the horizontal (short side) disposed at the lower end. A hole-shaped welding hole 20 is formed.

杭側支持具16は、図4に示すように、鋼板からなる平板状に形成され、一方の側端縁が溶接等により杭頭部1aに強固に固定できるようになっている。   As shown in FIG. 4, the pile-side support 16 is formed in a flat plate shape made of a steel plate, and one side edge can be firmly fixed to the pile head 1 a by welding or the like.

この杭側支持具16には、板厚方向に貫通した水平(短手)に向けた長穴状の複数のボルト挿通孔21,21と、上端部に配置された水平(短手)に向けた長穴状の溶接用孔22とが形成されている。   The pile-side support 16 has a plurality of elongated bolt insertion holes 21 and 21 that are horizontally (short) penetrating in the plate thickness direction and horizontally (short) arranged at the upper end. A long hole-like welding hole 22 is formed.

結合手段は、部材側支持具15と杭側支持具16とを剛結合できるものであれば特に限定されないが、本実施例では、接合板15bと杭側支持具16とに貫通させたボルト23の締め付けと溶接用孔20,22を利用した溶接とを併用している。   The coupling means is not particularly limited as long as the member-side support 15 and the pile-side support 16 can be rigidly coupled, but in this embodiment, the bolt 23 penetrated through the joining plate 15b and the pile-side support 16 is used. And the welding using the welding holes 20 and 22 are used in combination.

この接合支持部材3は、部材側支持具15の接合板15bと杭側支持具16とが互いに平板状であるので、杭頭部1aとプレキャストコンクリート部材2との位置調整の際、互いに相対移動可能に重ね合わされ、また、部材側支持具15のボルト挿通孔19,19と杭側支持具16のボルト挿通孔21,21とにボルト23を貫通させることにより部材側支持具15に杭側支持具16を水平方向に摺動可能に支持させることもできる。   Since the joining plate 15b of the member-side support 15 and the pile-side support 16 are flat each other, the joining support member 3 moves relative to each other when the positions of the pile head 1a and the precast concrete member 2 are adjusted. Further, the bolts 23 are passed through the bolt insertion holes 19, 19 of the member side support 15 and the bolt insertion holes 21, 21 of the pile side support 16 so as to be supported by the member side support 15. The tool 16 can also be slidably supported in the horizontal direction.

よって、このプレキャストコンクリート部材の杭頭部支持構造では、杭頭部1aとプレキャストコンクリート部材2との相対位置を調整する際に、部材側支持具15と杭側支持具16との相対位置が調整でき、そして、調整後の位置で部材側支持具15と杭側支持具16とを剛結合し、位置調整した状態を維持することができる。   Therefore, in this pile head support structure of a precast concrete member, when adjusting the relative position of the pile head 1a and the precast concrete member 2, the relative position of the member side support tool 15 and the pile side support tool 16 is adjusted. In addition, the member-side support 15 and the pile-side support 16 can be rigidly connected at the adjusted position, and the adjusted position can be maintained.

次に、上述の如き支持構造を使用したプレキャストコンクリート部材の杭頭部接合方法の具体的な手順を説明する。   Next, a specific procedure of the pile head joining method for the precast concrete member using the support structure as described above will be described.

まず、施工現場付近の陸上において、それぞれ予め工場等で製作されたプレキャストコンクリート造の主梁部材5,5及び横梁部材6,6を施工現場付近の陸上部に搬入し、そこで図2に示すように、各主梁部材5,5及び横梁部材6,6を型枠兼用連結具8によって連結し、プレキャストコンクリート部材2を組み立てる。   First, on the land near the construction site, the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 respectively manufactured in advance at a factory or the like are carried into the land portion near the construction site, as shown in FIG. In addition, the main beam members 5 and 5 and the cross beam members 6 and 6 are connected by the formwork / connector 8 to assemble the precast concrete member 2.

その際、プレキャストコンクリート部材2の杭頭部1a外周面と対向する面、即ち、主梁部材5,5杭挿入部用凹部7aの各内周面と、横梁部材6,6の端面にそれぞれ接合支持部材3の部材側支持具15を取付ける。   At that time, the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner peripheral surface of the main beam members 5 and 5 and the recessed portion 7a for the pile insertion portion, and the end surface of the transverse beam members 6 and 6, respectively The member side support 15 of the support member 3 is attached.

尚、杭側支持具16は、部材側支持具15より取り外された状態にあるか、又は、予め部材側支持具15にボルト締めによって摺動可能に仮固定された状態になっており、部材側支持具15に対し相対移動可能な状態にある。   In addition, the pile side support tool 16 is in a state of being removed from the member side support tool 15, or is in a state of being temporarily fixed to the member side support tool 15 so as to be slidable by bolting in advance. It is in a state in which it can move relative to the side support 15.

次に、図5に示すように、組み上がったプレキャストコンクリート部材2を吊り枠30に取付け、クレーン船又は陸上に設置されたクレーンで吊り上げる。尚、図中符号31は玉掛けワイヤ、符号32はクレーンより繰り出されたワイヤである。   Next, as shown in FIG. 5, the assembled precast concrete member 2 is attached to the suspension frame 30 and is lifted by a crane ship or a crane installed on land. In the figure, reference numeral 31 is a sling wire, and reference numeral 32 is a wire fed from a crane.

使用する吊り枠30は、クレーンに吊り持ちされる吊り枠本体33と、吊り枠本体33下に配置したプレキャストコンクリート部材2を吊り枠本体33に支持させる吊り具34,34...と、吊り枠本体33の杭挿入部7に整合させた位置に下向きに突設された高さ調整可能な支持脚部35,35...とを備え、吊り枠30を介してクレーンでプレキャストコンクリート部材2を吊り持つことができるようにしている。   The suspension frame 30 to be used includes a suspension frame main body 33 suspended by a crane, suspension tools 34, 34 ... for supporting the precast concrete member 2 disposed below the suspension frame main body 33 on the suspension frame main body 33, and suspension. .. Are provided with adjustable height supporting legs 35, 35... Projecting downward at a position aligned with the pile insertion portion 7 of the frame main body 33. So that you can hold it.

各支持脚部35,35...は、吊り枠本体33に上端が固定された伸縮可能な可動部36と、可動部36の下端に固定された下脚部37と、可動部36の高さを調整するための高さ調整用ジャッキ38とを備え、高さ調整用ジャッキ38を操作することにより支持脚部35,35毎に高さ調整ができるようになっている。   Each support leg 35, 35... Has a telescopic movable part 36 whose upper end is fixed to the suspension frame main body 33, a lower leg part 37 fixed to the lower end of the movable part 36, and the height of the movable part 36. And a height adjustment jack 38 for adjusting the height of the support leg 35 and the height of the support leg 35 can be adjusted by operating the height adjustment jack 38.

そして、図5に示すように、クレーン船又は陸上に設置されたクレーンで吊り枠30を介してプレキャストコンクリート部材2を吊り上げて移送し、図6に示すように、各杭1,1...の杭頭部1aが杭挿入部7内に挿入させるとともに、吊り枠30の各支持脚部35,35...を杭頭部1a上面に載置させる。   Then, as shown in FIG. 5, the precast concrete member 2 is lifted and transferred via a suspension frame 30 by a crane ship or a crane installed on land, and as shown in FIG. The pile head 1a is inserted into the pile insertion portion 7 and the supporting leg portions 35, 35... Of the suspension frame 30 are placed on the top surface of the pile head 1a.

この状態では、図6、図7に示すように、吊り枠30が各支持脚部35,35...を介して杭1,1...に支持され、クレーンによって吊り持ちされておらずとも、吊り枠30下に吊り支持されたプレキャストコンクリート部材2が杭挿入部7に杭頭部1aが挿入された状態で安定して保持されている。   In this state, as shown in FIGS. 6 and 7, the suspension frame 30 is supported by the piles 1, 1... Via the respective support legs 35, 35. In both cases, the precast concrete member 2 suspended and supported under the suspension frame 30 is stably held in a state where the pile head 1 a is inserted into the pile insertion portion 7.

このとき、接合支持部材3の杭側支持具16は、未だ杭頭部1a外周面に固定されておらず、接合支持部材3の杭頭部1aに対する相対高さ、即ちプレキャストコンクリート部材2の杭頭部1aに対する相対位置を自由に調整することができる。   At this time, the pile-side support 16 of the joint support member 3 is not yet fixed to the outer peripheral surface of the pile head 1a, and the relative height of the joint support member 3 to the pile head 1a, that is, the pile of the precast concrete member 2 The relative position with respect to the head 1a can be freely adjusted.

そして、この状態で各支持脚部35,35...の高さ調整用ジャッキ38を操作し、各鉄筋9,9...の位置、プレキャストコンクリート部材2の平行度等を合わせつつ杭頭部1aに対するプレキャストコンクリート部材2の高さを調整する。   Then, in this state, the height adjustment jacks 38 of the respective support legs 35, 35... Are operated so that the positions of the respective reinforcing bars 9, 9. The height of the precast concrete member 2 with respect to the part 1a is adjusted.

杭頭部1aに対するプレキャストコンクリート部材2の高さ調整が完了したら、次に、部材側支持具15に対して杭側支持具16を摺動させてその相対位置を調整し、杭側支持具16の側縁部を杭頭部1aの外周面に当接させる。   When the height adjustment of the precast concrete member 2 with respect to the pile head 1a is completed, the pile-side support 16 is then slid with respect to the member-side support 15 to adjust its relative position. Are brought into contact with the outer peripheral surface of the pile head 1a.

そして、その状態で接合板15bと杭側支持具16とに貫通させた結合ボルトを締め付け、且つ、杭側支持具16と部材側支持具15とを溶接用孔20,22を用いて溶接し、接合板15bと杭側支持具16とを剛結合し、更に、杭側支持具16の側縁部を杭頭部1a外周面に溶接する。   Then, in this state, the coupling bolt that is passed through the joining plate 15b and the pile-side support 16 is tightened, and the pile-side support 16 and the member-side support 15 are welded using the welding holes 20 and 22. The joining plate 15b and the pile side support 16 are rigidly connected, and the side edge of the pile side support 16 is welded to the outer peripheral surface of the pile head 1a.

これにより、プレキャストコンクリート部材2は、接合支持部材3を介して杭1,1...に支持された状態となり、プレキャストコンクリート部材2から吊り枠30を取り外すことが可能となる。   Thereby, the precast concrete member 2 will be in the state supported by the pile 1,1, ... via the joining support member 3, and it will become possible to remove the suspension frame 30 from the precast concrete member 2. FIG.

次に、図7中の破線及び図8に示すように、各杭1,1...の杭頭部1aにプレキャストコンクリート部材2の各鉄筋9,9...の位置に合わせて杭側鉄筋40,40...を配筋するとともに、杭頭部1aの外周面に杭側鉄筋40,40...の下面を支持するように鉄筋受けプレート41,41...を溶接し、杭側鉄筋40,40...をプレキャストコンクリート部材2に埋設させた各鉄筋9,9...に機械継手10を介して接続するとともに、杭側鉄筋40,40...を鉄筋受けプレート41に溶接する。   Next, as shown in the broken line in FIG. 7 and FIG. 8, the pile head 1 a of each pile 1, 1... Is aligned with the position of each rebar 9, 9. Reinforcing the reinforcing bars 40, 40 ... and welding the reinforcing bar receiving plates 41, 41 ... so as to support the lower surface of the pile-side reinforcing bars 40, 40 ... on the outer peripheral surface of the pile head 1a. The pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bars 9, 9 ... embedded in the precast concrete member 2 via the mechanical joint 10, and the pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bar receiving plate. Weld to 41.

そして、吊り枠30をプレキャストコンクリート部材2から取り外して撤去し、接合支持部材3を介して各杭1,1...にプレキャストコンクリート部材2を支持させる。   Then, the suspension frame 30 is removed from the precast concrete member 2 and removed, and the precast concrete member 2 is supported by the piles 1, 1.

次に、杭挿入部7の下面側開口を底用型枠材42によって閉鎖し、その状態で各杭挿入部7内にコンクリート4を打設し、そのコンクリート4を養生固化させることにより、杭頭部1aとプレキャストコンクリート部材2とを接合させ、各杭1,1...とプレキャストコンクリート部材2とを一体化させる。   Next, the lower surface side opening of the pile insertion part 7 is closed by the bottom formwork material 42, and the concrete 4 is placed in each pile insertion part 7 in that state, and the concrete 4 is cured and solidified. The head 1a and the precast concrete member 2 are joined, and each pile 1,1 ... and the precast concrete member 2 are integrated.

尚、プレキャストコンクリート部材2を構成する主梁部材5,5と横梁部材6,6とが打設されたコンクリートを介して一体化されるので、図1に示すように、型枠兼用連結具8を取り外すことができ、取り外した型枠兼用連結具8を他に転用することができる。   Since the main beam members 5 and 5 and the cross beam members 6 and 6 constituting the precast concrete member 2 are integrated through the cast concrete, as shown in FIG. Can be removed, and the removed combined mold / connector 8 can be used elsewhere.

そして、図5〜図8に示す一連の作業を必要に応じて繰り返し、杭頭部1aにプレキャストコンクリート部材2からなる梁部を一体化させた構造を成し、特に図示しないが、その梁部上に現場打ちコンクリート又はプレキャスト造によって床版を形成し、桟橋を構築する。   Then, a series of operations shown in FIGS. 5 to 8 are repeated as necessary to form a structure in which the beam portion made of the precast concrete member 2 is integrated with the pile head 1a. A floor slab is formed on the top using cast-in-place concrete or precast, and a pier is constructed.

このように構成されたプレキャストコンクリート部材の杭頭部接合方法では、接合支持部材3を構成する部材側支持具15と杭側支持具16とが互いに相対移動可能であって、両者が結合手段によって剛結合できる構造としたことで、杭1,1...毎に杭頭部1aに対するプレキャストコンクリート部材2の相対位置を調整することができるので、従来技術に比べ杭1,1...設置の精度が緩和され、その分、工費及び工期を縮減することができる。   In the pile head joining method of the precast concrete member configured as described above, the member side support tool 15 and the pile side support tool 16 constituting the joining support member 3 can be moved relative to each other, and both of them can be joined by a coupling means. Because the structure can be rigidly connected, the relative position of the precast concrete member 2 with respect to the pile head 1a can be adjusted for each pile 1, 1. Therefore, the construction cost and construction period can be reduced accordingly.

また、この杭頭部1a接合方法では、図に示す如き吊り枠30を使用することによって、プレキャストコンクリート部材2を各杭1,1...に安定して保持させることができるとともに、支持脚部35,35...毎に高さ調整が可能である。   Moreover, in this pile head 1a joining method, while using the suspension frame 30 as shown in the figure, the precast concrete member 2 can be stably held by each pile 1, 1,. Height adjustment is possible for each part 35, 35 ....

尚、上述の実施例では、プレキャストコンクリート造の主梁部材5,5と横梁部材6,6とを型枠用連結具8で連結させたプレキャストコンクリート部材2を例に説明したが、プレキャストコンクリート部材2の態様はこれに限定されず、例えば、主梁部材5,5又は横梁部材6,6をそれぞれ独立したプレキャストコンクリート部材2として本発明を適用してもよい。   In the above-described embodiment, the precast concrete member 2 in which the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 are connected to each other by the formwork coupler 8 is described as an example. The aspect of 2 is not limited to this, For example, you may apply this invention by making the main beam members 5 and 5 or the cross beam members 6 and 6 into the independent precast concrete member 2, respectively.

また、上述の実施例において、接合支持部材3の部材側支持具15は、プレキャストコンクリート部材2を組み立てる際に取り付けたが、その取付けの時期は、プレキャストコンクリート部材2を杭頭部1aに設置した際、又は杭頭部1aに対するプレキャストコンクリート部材2の相対位置を調整した後でもよい。   Moreover, in the above-mentioned Example, although the member side support tool 15 of the joining support member 3 was attached when assembling the precast concrete member 2, the precast concrete member 2 was installed in the pile head 1a at the time of the attachment. Or after adjusting the relative position of the precast concrete member 2 with respect to the pile head 1a.

更に、上述の実施例では、部材側支持具15に対する杭側支持具16の相対位置を調整した後、杭側支持具16を杭頭部1aの外周に溶接した場合について説明したが、図9に示すように、杭側支持具16を杭頭部1aの外周に予め溶接しておき、その状態で杭頭部1aとプレキャストコンクリート部材2との相対位置を調整しつつ、部材側支持具15と杭側支持具16との相対位置を調整し、しかる後、部材側支持具15と杭側支持具16とを剛結合するようにしてもよい。   Furthermore, although the above-mentioned Example demonstrated the case where after adjusting the relative position of the pile side support tool 16 with respect to the member side support tool 15, the pile side support tool 16 was welded to the outer periphery of the pile head 1a, FIG. The pile side support 16 is welded to the outer periphery of the pile head 1a in advance, and the member side support 15 is adjusted while adjusting the relative position of the pile head 1a and the precast concrete member 2 in this state. It is also possible to adjust the relative position between the pile side support 16 and the member side support 15 and the pile side support 16 after that.

1 杭
2 プレキャストコンクリート部材
3 接合支持部材
5 主梁部材
6 横梁部材
7 杭挿入部
7a 杭挿入部用凹部
8 型枠兼用連結具
9 鉄筋
10 機械継手
11 連結具本体
12 取付片
13 ボルト
14 補強片
15 部材側支持具
15a 取付板
15b 接合板
16 杭側支持具
17 ボルト挿通孔
18 ボルト
19 ボルト挿通孔
20 溶接用孔
21 ボルト挿通孔
22 溶接用孔
30 吊り枠
31 玉掛けワイヤ
32 ワイヤ
33 吊り枠本体
34 吊り具
35 支持脚部
36 可動部
37 下脚部
38 高さ調整用ジャッキ
40 杭側鉄筋
41 鉄筋受けプレート
42 底用型枠材
DESCRIPTION OF SYMBOLS 1 Pile 2 Precast concrete member 3 Joining support member 5 Main beam member 6 Cross beam member 7 Pile insertion part 7a Pile insertion part recessed part 8 Formwork combined connection tool 9 Reinforcement 10 Mechanical joint 11 Connection tool main body 12 Attachment piece 13 Bolt 14 Reinforcement piece 15 member side support 15a mounting plate 15b joint plate 16 pile side support 17 bolt insertion hole 18 bolt 19 bolt insertion hole 20 welding hole 21 bolt insertion hole 22 welding hole 30 hanging frame 31 sling wire 32 wire 33 hanging frame main body 34 Lifting tool 35 Supporting leg part 36 Movable part 37 Lower leg part 38 Height adjusting jack 40 Pile side reinforcing bar 41 Reinforcing bar receiving plate 42 Form material for bottom

Claims (5)

杭頭部にプレキャストコンクリート部材を支持させ、その状態で前記杭頭部と前記プレキャストコンクリート部材との間にコンクリートを充填し、前記杭頭部と前記プレキャストコンクリート部材とを接合するプレキャストコンクリート部材の杭頭部接合方法において、
前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定可能な杭側支持具とからなる接合支持部材を使用し、
前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具と前記杭側支持具との相対位置を調整した後、該杭側支持具と前記部材側支持具とを剛結合し、前記杭頭部に前記接合支持部材を介して前記プレキャストコンクリート部材を支持させることを特徴とするプレキャストコンクリート部材の杭頭部接合方法。
A pile of precast concrete members, in which a precast concrete member is supported on a pile head, concrete is filled between the pile head and the precast concrete member in that state, and the pile head and the precast concrete member are joined. In the head joining method,
The member-side support that is fixed to the surface of the precast concrete member that faces the outer peripheral surface of the pile head, and the position of the precast concrete member that is fixed with respect to the pile head is fixed to the member-side support. Using a joint support member composed of a pile-side support that can be relatively moved in the axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head,
While adjusting the relative position of the pile head and the precast concrete member, and after adjusting the relative position of the member side support tool and the pile side support tool, the pile side support tool and the member side support tool, And connecting the pile heads to the pile heads via the joining support members.
前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整するとともに、前記部材側支持具に対する前記杭側支持具の相対位置を調整した後に、前記杭側支持具を前記杭頭部に固定する請求項1に記載のプレキャストコンクリート部材の杭頭部接合方法。   While adjusting the relative position of the pile head and the precast concrete member, and adjusting the relative position of the pile side support with respect to the member side support, the pile side support is fixed to the pile head. The pile head joining method of the precast concrete member according to claim 1. 前記杭側支持具を前記杭頭部の外周に予め固定しておき、その状態で前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整しつつ、前記部材側支持具と前記杭側支持具との相対位置を調整し、しかる後、該杭側支持具と前記部材側支持具とを剛結合する請求項1に記載のプレキャストコンクリート部材の杭頭部接合方法。   The pile-side support is fixed in advance to the outer periphery of the pile head, and the member-side support and the pile-side support are adjusted while adjusting the relative position of the pile head and the precast concrete member in that state. The pile head joining method of a precast concrete member according to claim 1, wherein the pile side support tool and the member side support tool are rigidly connected after adjusting the relative position with the tool. 前記プレキャストコンクリート部材を吊り持ち支持する吊り枠を使用し、該吊り枠には、前記クレーンに吊り持ちされる吊り枠本体と、該吊り枠本体下に配置した前記プレキャストコンクリート部材を前記吊り枠本体に支持させる吊り具と、前記吊り枠本体の前記杭挿入部に整合させた位置に下向きに突設された高さ調整可能な支持脚部とを備え、前記支持脚部を前記杭頭部上面に支持させ、前記吊り枠を前記杭に支持させるとともに、前記支持脚部の高さを調整することにより前記杭頭部と前記プレキャストコンクリート部材との相対高さを調整する請求項1〜3の何れか1に記載のプレキャストコンクリート部材の杭頭部接合方法。   A suspension frame that suspends and supports the precast concrete member is used, and the suspension frame body includes a suspension frame body that is suspended by the crane, and the precast concrete member disposed below the suspension frame body. And a height-adjustable support leg projecting downward at a position aligned with the pile insertion portion of the suspension frame body, and the support leg portion is disposed on the top surface of the pile head. And adjusting the relative height between the pile head and the precast concrete member by adjusting the height of the support leg. The pile head joining method of the precast concrete member of any one. プレキャストコンクリート部材を杭頭部に接合する際、前記杭頭部に前記プレキャストコンクリート部材が接合支持部材を介して仮支持されるようにしたプレキャストコンクリート部材の杭頭部支持構造において、
前記接合支持部材は、前記プレキャストコンクリート部材の杭頭部外周面と対向する面に固定される部材側支持具と、前記杭頭部に対する前記プレキャストコンクリート部材の位置が固定された状態において、前記部材側支持具に対し杭軸方向及び杭径方向で相対移動可能、且つ、前記杭頭部の外周面に固定される杭側支持具と、該杭側支持具と前記部材側支持具とを剛結合する結合手段とを備え、
前記杭頭部と前記プレキャストコンクリート部材との相対位置を調整する際に、前記部材側支持具と前記杭側支持具との相対位置が調整でき、且つ、調整後の位置で前記部材側支持具と前記杭側支持具とを剛結合できるようにしたことを特徴とするプレキャストコンクリート部材の杭頭部支持構造。
In joining the precast concrete member to the pile head, the pile head support structure of the precast concrete member in which the precast concrete member is temporarily supported via the joint support member on the pile head,
In the state where the joint support member is fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the position of the precast concrete member with respect to the pile head is fixed, the member A pile-side support that is movable relative to the side support in the pile axial direction and the pile radial direction and that is fixed to the outer peripheral surface of the pile head; and the pile-side support and the member-side support A coupling means for coupling,
When adjusting the relative position between the pile head and the precast concrete member, the relative position between the member-side support and the pile-side support can be adjusted, and the member-side support at the adjusted position. A pile head support structure for a precast concrete member, wherein the pile side support tool can be rigidly coupled.
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CN109577197A (en) * 2018-11-05 2019-04-05 中铁二十二局集团轨道工程有限公司 A kind of construction method of thick sand bed Pile In Karst Area
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CN114319081A (en) * 2022-01-17 2022-04-12 宁波市高等级公路建设管理中心 Prefabricated UHPC bent cap structure of quick installation

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CN109577197A (en) * 2018-11-05 2019-04-05 中铁二十二局集团轨道工程有限公司 A kind of construction method of thick sand bed Pile In Karst Area
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CN114319081B (en) * 2022-01-17 2024-01-02 宁波市高等级公路建设管理中心 Prefabricated UHPC bent cap structure of quick installation

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