JP2018115514A - Method for constructing pile bearing structure, and reinforcement member used in the pile bearing structure - Google Patents

Method for constructing pile bearing structure, and reinforcement member used in the pile bearing structure Download PDF

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JP2018115514A
JP2018115514A JP2017008457A JP2017008457A JP2018115514A JP 2018115514 A JP2018115514 A JP 2018115514A JP 2017008457 A JP2017008457 A JP 2017008457A JP 2017008457 A JP2017008457 A JP 2017008457A JP 2018115514 A JP2018115514 A JP 2018115514A
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piles
pile
precast concrete
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support structure
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JP6909959B2 (en
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勝哉 池野
Katsuya Ikeno
勝哉 池野
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Penta Ocean Construction Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a method for constructing a pile bearing structure in which it is possible to install a precast concrete member efficiently and to achieve reinforcement of a structure, and a reinforcement member used in the pile bearing structure.SOLUTION: The method for constructing the pile bearing structure comprises installing piles 3, 3 to space them in a normal direction and a normal right-angle direction, then connecting between the piles adjacent to each other using reinforcement members 10a to 10d, thereafter joining precast concrete members 4, 4 in that condition, and installing cast-in-place concrete 11 between the precast concrete members 4, 4. Thus, it is possible to install the precast concrete members and cast-in-place concrete efficiently, and possible to achieve reinforcement of the structure.SELECTED DRAWING: Figure 1

Description

本発明は、桟橋等の杭頭部にコンクリート製の上部工が接合された杭支持構造物の構築方法及びそれに使用する補強部材に関する。   The present invention relates to a method for constructing a pile support structure in which a concrete superstructure is joined to a pile head such as a pier and a reinforcing member used therefor.

従来、桟橋等の杭支持構造物の構築においては、複数の鋼管杭を打設した後、海上において、足場設置、支保工設置、杭頭処理工等の各作業を行うとともに、鋼管杭間に架け渡した支保工を利用して鋼管杭間に型枠を形成し、コンクリートを場所打ちすることによってコンクリート製の上部工を形成していた。   Conventionally, in the construction of a pile support structure such as a pier, after placing a plurality of steel pipe piles, each work such as scaffolding installation, support installation, pile head treatment work, etc. is carried out at sea, and between steel pipe piles. A concrete frame was formed between steel pipe piles using a spanned support, and a concrete superstructure was formed by placing the concrete in place.

この杭支持構造物の構築においては、一連の構築作業を海上で行うため、海象・気象条件が悪い場合、鋼管杭が波浪等によって揺動し、各作業に支障を来すおそれがあることから、鋼管杭の打設後に各鋼管杭間を仮設の鋼材で連結し、鋼管杭を互いに支持させるようにしていた。   In the construction of this pile support structure, since a series of construction work is performed at sea, if the sea conditions and weather conditions are bad, the steel pipe pile may sway due to waves, etc., which may interfere with each work. The steel pipe piles were connected with temporary steel after the steel pipe piles were placed, and the steel pipe piles were supported together.

また、鋼管杭間に支保工を架設する場合には、上述の仮設鋼材とともに、或いは、仮設鋼材に代えて支保工によって鋼管杭間を互いに支持させるようにしていた。   Moreover, when installing a support work between steel pipe piles, it was made to support between steel pipe piles with the above-mentioned temporary steel material or instead of a temporary steel material by a support work.

また、近年では、上部工（梁部分）を構成する１又は複数のプレキャストコンクリート造の既製部材（以下、プレキャストコンクリート部材という）を予め陸上の工場又は製作ヤードで製造し、それを施工現場に搬送し、鋼管杭の頭部にクレーン等を用いてプレキャストコンクリート部材を支持させ、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場所打ちコンクリートを打設することにより接合させるようにした工法（以下、ＰＣａブロック工法という）が用いられ、工期短縮及び品質向上が図られている（例えば、特許文献１を参照）。   In recent years, one or more precast concrete prefabricated members (hereinafter referred to as precast concrete members) that constitute the superstructure (beam part) are manufactured in advance in an on-site factory or production yard and transported to the construction site. Then, the precast concrete member is supported on the head of the steel pipe pile using a crane or the like, and in that state, cast-in-place concrete is placed between the pile head and the precast concrete member to join them ( Hereinafter, the PCa block construction method is used, and the construction period is shortened and the quality is improved (see, for example, Patent Document 1).

尚、上部工を複数のプレキャストコンクリート部材によって構成する場合には、各プレキャストコンクリート部材間に場所打ちコンクリートを打設し、各プレキャストコンクリート部材間を接続するようにしている。   When the superstructure is composed of a plurality of precast concrete members, cast-in-place concrete is placed between the precast concrete members to connect the precast concrete members.

このＰＣａブロック工法は、複数のプレキャストコンクリート部材に分割することにより、各プレキャストコンクリート部材を揚重・移送させる起重機船等の装置が小規模のものでよく、その分、費用の低減及び狭い水域など大型船の移動が制限される場所でも施工可能という利点も備えている。   In this PCa block construction method, by dividing into a plurality of precast concrete members, the equipment such as a hoist ship that lifts and transfers each precast concrete member may be a small-scale device. It also has the advantage that it can be constructed even in places where movement of large ships is restricted.

一方、この種の杭支持構造物では、各鋼管杭間をストラットと呼ばれる補強鋼材によって連結し、鋼管杭を互いに支持させることにより、水平剛性及び水平耐力を増加させる補強方法（以下、ストラット工法という）が知られている（例えば、特許文献２を参照）。   On the other hand, in this type of pile support structure, each steel pipe pile is connected by a reinforcing steel material called a strut and the steel pipe piles are supported to each other, thereby increasing the horizontal rigidity and the horizontal strength (hereinafter referred to as the strut method). ) Is known (see, for example, Patent Document 2).

このストラット工法では、各杭の水平剛性及び水平耐力が増加することによって、鋼管杭の小断面化や杭本数を削減し、コストの低減を図ることもできる。   In this strut method, the horizontal rigidity and the horizontal strength of each pile increase, so that the cross section of the steel pipe pile and the number of piles can be reduced, and the cost can be reduced.

特開２００１−２８８７２５号公報JP 2001-288725 A 特開平９−２３５７１４号公報JP-A-9-235714

しかしながら、上述の如きＰＣａブロック工法においては、型枠設置のために各鋼管杭間に支保工を架け渡す必要がなく、その分の費用の削減及び工期の短縮を図ることができるという利点があるが、その一方で、海象・気象条件が悪い場合には、鋼管杭が波浪等によって揺動するおそれがあることから、各鋼管杭間を仮設の鋼材で連結する必要があり、そのため、支保工を省略できるというＰＣａブロック工法の利点が生かし切れていないという問題があった。   However, in the PCa block construction method as described above, there is no need to bridge a support work between the steel pipe piles for installing the formwork, and there is an advantage that the cost can be reduced and the work period can be shortened. On the other hand, if the sea conditions and weather conditions are bad, the steel pipe piles may swing due to waves, etc., so it is necessary to connect the steel pipe piles with temporary steel materials. There is a problem that the advantage of the PCa block construction method that can be omitted is not fully utilized.

一方、従来のストラット工法では、波浪等による外力が作用することが予想される方向の補強を主としたものであり、ＰＣａブロック工法との併用が想定されていなかった。   On the other hand, the conventional strut method mainly reinforces the direction in which an external force due to waves or the like is expected to act, and was not assumed to be used in combination with the PCa block method.

そこで、本発明は、このような従来の問題に鑑み、プレキャストコンクリート部材の設置を効率よく行え、且つ、構造物の補強を図ることができる杭支持構造物の構築方法の提供を目的としてなされたものである。   Then, in view of such a conventional problem, the present invention was made for the purpose of providing a method for constructing a pile support structure that can efficiently install a precast concrete member and can reinforce the structure. Is.

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、構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させる杭支持構造物の構築方法において、前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する一定長さの連結補強材とを備えた補強部材を使用し、隣り合う杭間を前記補強部材で連結し、該隣り合う杭を互いに支持させて補強した後、前記杭に前記プレキャストコンクリート部材を接合させるとともに、該プレキャストコンクリート部材間を現場打ちコンクリートで連結する杭支持構造物の構築方法にある。   The feature of the invention according to claim 1 for solving the conventional problems as described above is that after placing a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed In the method for constructing a pile support structure in which a precast concrete member is joined to the pile head, a plurality of fitting portions to be fitted to the pile, and a connection reinforcing material having a fixed length for connecting the fitting portions, The adjacent piles are connected by the reinforcing member, and the adjacent piles are supported and reinforced, and then the precast concrete member is joined to the pile, and the precast concrete member It is in the construction method of the pile support structure which connects between with the cast-in-place concrete.

請求項２に記載の発明の特徴は、請求項１の構成に加え、前記補強部材は、嵌合部を直列配置した直線型、嵌合部を三隅に配置した三角形型、嵌合部を四隅に配置した矩形型又はコ字型の何れか一を前記場所打ちコンクリートの位置に合わせて適宜選択して使用することにある。   According to a second aspect of the present invention, in addition to the configuration of the first aspect, the reinforcing member includes a linear type in which fitting parts are arranged in series, a triangular type in which fitting parts are arranged in three corners, and four fitting parts in four corners. One of the rectangular shape and the U-shape arranged in the above is to be appropriately selected and used in accordance with the position of the cast-in-place concrete.

請求項３に記載の発明の特徴は、構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させて構築される杭支持構造物の隣り合う杭間を連結する補強部材において、前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する連結補強材とを備え、該連結補強材は、前記杭間の法線方向距離と同じ長さの法線方向用連結補強材、杭間の法線直角方向距離と同じ長さの法直方向用連結補強材及び／又は対角線方向に隣り合う杭間距離と同じ長さの対角線用連結補強材で構成され、前記嵌合部を直列配置した直線型、前記嵌合部を三隅に配置した三角形型、前記各嵌合部を四隅に配置された矩形型又はコ字型に形成されている補強部材にある。   The feature of the invention described in claim 3 is that after placing a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed, a precast concrete member is joined to the pile head. A reinforcing member for connecting adjacent piles of a pile support structure constructed by a plurality of fitting portions to be fitted to the piles, and a connecting reinforcing material for connecting the fitting portions; The connection reinforcing material is a normal direction connecting reinforcing material having the same length as the normal direction distance between the piles, a normal direction connecting reinforcing material and / or a diagonal line having the same length as the normal direction perpendicular distance between the piles. It is composed of diagonal connecting reinforcements having the same length as the distance between adjacent piles in the direction, the linear shape in which the fitting portions are arranged in series, the triangular shape in which the fitting portions are arranged in three corners, and the respective fitting portions. The reinforcing member is formed in a rectangular shape or a U-shape disposed at four corners.

本発明に係る杭支持構造物の構築方法は、上述したように、構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させる杭支持構造物の構築方法において、前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する一定長さの連結補強材とを備えた補強部材を使用し、隣り合う杭間を前記補強部材で連結し、該隣り合う杭を互いに支持させて補強した後、前記杭に前記プレキャストコンクリート部材を接合させるとともに、該プレキャストコンクリート部材間を現場打ちコンクリートで連結することにより、支保工や仮固定用の鋼材を用いずに杭の位置決めを容易に行うことができるとともに、杭支持構造物全体の剛性を向上させることができる。   As described above, the method for constructing a pile support structure according to the present invention, after placing a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed, In a method for constructing a pile support structure in which a precast concrete member is joined to a portion, reinforcement comprising a plurality of fitting portions to be fitted to the pile, and a connection reinforcing material having a fixed length for connecting the fitting portions. After connecting the adjacent piles with the reinforcing member and reinforcing the adjacent piles to each other, the precast concrete member is joined to the pile and the precast concrete member is cast in place between the precast concrete members. By connecting with concrete, it is possible to easily position the pile without using a support material or a steel material for temporary fixing, and it is possible to improve the rigidity of the entire pile support structure.

また、本発明において、前記補強部材は、嵌合部を直列配置した直線型、嵌合部を三隅に配置した三角形型、嵌合部を四隅に配置した矩形型又はコ字型の何れか一を前記場所打ちコンクリートの位置に合わせて適宜選択して使用することにより、パターン化された形状の複数の補強部材の組み合わせによって、様々なプレキャストコンクリート部材の配置に容易に対応することができる。   In the present invention, the reinforcing member is any one of a linear type in which fitting parts are arranged in series, a triangular type in which fitting parts are arranged in three corners, a rectangular type in which fitting parts are arranged in four corners, or a U-shaped type. Can be appropriately selected and used in accordance with the position of the cast-in-place concrete, so that various precast concrete members can be easily arranged by combining a plurality of patterned reinforcing members.

本発明に係る補強部材は、構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させて構築される杭支持構造物の隣り合う杭間を連結する補強部材において、前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する連結補強材とを備え、該連結補強材は、前記杭間の法線方向距離と同じ長さの法線方向用連結補強材、杭間の法線直角方向距離と同じ長さの法直方向用連結補強材及び／又は対角線方向に隣り合う杭間距離と同じ長さの対角線用連結補強材で構成され、前記嵌合部を直列配置した直線型、前記嵌合部を三隅に配置した三角形型、前記各嵌合部を四隅に配置された矩形型又はコ字型に形成されていることにより、杭支持構造物の杭間距離を所定の間隔に維持することができるとともに、杭間を連結して互いに支持させることができる。   The reinforcing member according to the present invention is constructed by placing a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed, and then joining a precast concrete member to the pile head In the reinforcing member that connects adjacent piles of the pile support structure to be provided, the reinforcing member includes a plurality of fitting portions that are fitted to the piles, and a connection reinforcing material that connects the fitting portions. Is connected to the normal direction connecting reinforcement of the same length as the normal direction distance between the piles, the normal direction connecting reinforcing material of the same length as the normal direction distance between the piles and / or adjacent to the diagonal direction. Consists of diagonal connecting reinforcements with the same length as the distance between the mating piles, linear type with the fitting parts arranged in series, triangular type with the fitting parts arranged in three corners, and each fitting part arranged in four corners The distance between the piles of the pile support structure is reduced by being formed into a rectangular shape or a U shape. It is possible to maintain a constant distance, can be coupled between piles to support each other.

(ａ)は本発明に係る杭支持構造物の構築方法により構築された杭支持構造物の一例を示す側面図、（ｂ）は同Ａ−Ａ線矢視図である。(a) is a side view which shows an example of the pile support structure constructed | assembled by the construction method of the pile support structure which concerns on this invention, (b) is the same AA arrow directional view. 図1中の補強部材を示す平面図であって、（ａ）は直線型、（ｂ）三角型、（ｃ）は矩形型、（ｄ）はコ字型である。It is a top view which shows the reinforcement member in FIG. 1, Comprising: (a) is a linear type, (b) Triangular type, (c) is a rectangular type, (d) is U shape. 補強部材の取り付け状態を示す平面図、（ｂ）は同縦断面図である。The top view which shows the attachment state of a reinforcement member, (b) is the longitudinal cross-sectional view. (ａ)は本発明に係る杭支持構造物の構築方法における補強部材取り付け作業の初期段階の状態を示す側面図、（ｂ）は同平面図である。(a) is a side view which shows the state of the initial stage of the reinforcement member attachment operation | work in the construction method of the pile support structure which concerns on this invention, (b) is the same top view. (ａ)は同上の補強部材取り付け作業の後段階の状態を示す側面図、（ｂ）は同平面図である。(a) is a side view which shows the state of the latter stage of a reinforcement member attachment operation | work same as the above, (b) is the top view. (ａ)は同上のプレキャストコンクリート部材の取り付け作業の状態を示す側面図、（ｂ）は同平面図である。(a) is a side view which shows the state of the attachment operation | work of the precast concrete member same as the above, (b) is the same top view.

次に、本発明に係る杭支持構造物の構築方法の実施態様を図１〜図６に示した実施例に基づいて説明する。   Next, an embodiment of a method for constructing a pile support structure according to the present invention will be described based on the examples shown in FIGS.

図１(ａ)は本発明により構築された杭支持構造物１の側面図、図１（ｂ）は同Ａ-Ａ線矢視図である。尚、図１(ａ)中の右側を陸側、左側を沖側とし、図１（ｂ）中に示す方向をそれぞれ構築する杭支持構造物１の法線方向及び法線直角方向（以下、法直方向という）として説明する。   Fig.1 (a) is a side view of the pile support structure 1 constructed | assembled by this invention, FIG.1 (b) is the same AA arrow directional view. The right side in FIG. 1 (a) is the land side, the left side is the offshore side, and the normal direction and normal direction perpendicular to the pile support structure 1 constructing the directions shown in FIG. This is referred to as “straight direction”.

杭支持構造物１は、図１に示すように、法線方向及び法直方向に間隔をおいて水底地盤２に打設された複数の鋼管杭３，３…と、鋼管杭３，３…に支持されたプレキャストコンクリート部材４，４…と、プレキャストコンクリート部材４，４間を連結する場所打ちコンクリート１１とを備え、プレキャストコンクリート部材４，４…と場所打ちコンクリート１１とによって梁部５を成し、その梁部５上に床版部６が形成され、梁部５と床版部６とにより上部工７を成している。   As shown in FIG. 1, the pile support structure 1 includes a plurality of steel pipe piles 3, 3..., And steel pipe piles 3, 3. , And cast-in-place concrete 11 connecting the pre-cast concrete members 4, 4. The precast concrete members 4, 4. A floor slab portion 6 is formed on the beam portion 5, and the beam portion 5 and the floor slab portion 6 constitute an upper work 7.

また、この杭支持構造物１では、鋼管杭３と嵌合する複数の嵌合部８，８…と、嵌合部８，８間を連結する一定長さの連結補強材９とを備えた補強部材１０ａ〜１０ｄを使用し、鋼管杭３，３…を水底地盤２に打設した後、所定の隣り合う鋼管杭３，３間が補強部材１０ａ〜１０ｄで連結され、その状態で各プレキャストコンクリート部材４，４…を杭頭部に接合する。   Moreover, in this pile support structure 1, it provided with the some fitting part 8,8 ... which fits with the steel pipe pile 3, and the connection reinforcement material 9 of the fixed length which connects between the fitting parts 8 and 8. FIG. After using the reinforcing members 10a to 10d and placing the steel pipe piles 3, 3... On the water bottom ground 2, the predetermined adjacent steel pipe piles 3, 3 are connected by the reinforcing members 10a to 10d, and each precast is in that state. The concrete members 4, 4 ... are joined to the pile head.

梁部５は、図１に示すように、複数のプレキャストコンクリート部材４，４…と、各プレキャストコンクリート部材４，４間を連結する場所打ちコンクリート部１１，１１…とを備え、格子状に形成されている。   As shown in FIG. 1, the beam portion 5 includes a plurality of precast concrete members 4, 4... And cast-in-place concrete portions 11, 11. Has been.

各プレキャストコンクリート部材４，４…は、下面が開口した穴の内側に鞘管１３，１３を備え、鞘管１３，１３内に配置した支承部材が鋼管杭３の杭頭部に支持されることにより仮支持され、嵌合された鞘管１３，１３と杭頭部との間にグラウト等の充填材が打設されることにより杭頭部に接合されるようになっている。   Each of the precast concrete members 4, 4... Has the sheath pipes 13, 13 inside the hole whose bottom surface is opened, and the support member disposed in the sheath pipes 13, 13 is supported by the pile head of the steel pipe pile 3. By inserting a filler such as grout between the sheath pipes 13 and 13 and the pile head temporarily supported and fitted together, the pile head is joined.

また、プレキャストコンクリート部材４は、鞘管１３，１３が間隔を置いて配置された梁状に形成され、隣り合う鋼管杭３，３…に跨って支持されるようになっている。   Further, the precast concrete member 4 is formed in a beam shape in which the sheath pipes 13 and 13 are arranged at an interval, and is supported across the adjacent steel pipe piles 3, 3.

そして、梁部５は、各プレキャストコンクリート部材４，４…を組み合わせ、互いに隣り合うプレキャストコンクリート部材４，４間に場所打ちコンクリート１１を打設することにより、格子状に形成されている。   The beam portion 5 is formed in a lattice shape by combining the precast concrete members 4, 4... And placing the cast-in-place concrete 11 between the precast concrete members 4 and 4 adjacent to each other.

鞘管１３，１３は、筒状に形成され、杭挿入部に挿入された状態でプレキャストコンクリート部材４と一体化されている。尚、鞘管１３の長さは、図に示すように、プレキャストコンクリート部材４の高さ（上下方向厚さ）より長く形成され、下側がプレキャストコンクリート部材４の下面より突出させたものに限定されず、プレキャストコンクリート部材４の高さ（上下方向厚さ）程度あるいは短く形成されたものでもよい。   The sheath tubes 13 and 13 are formed in a cylindrical shape and are integrated with the precast concrete member 4 in a state of being inserted into the pile insertion portion. As shown in the figure, the length of the sheath tube 13 is limited to a length that is longer than the height (vertical thickness) of the precast concrete member 4 and whose lower side protrudes from the lower surface of the precast concrete member 4. Instead, the precast concrete member 4 may be formed to have a height (up-down direction thickness) or shorter.

支承部材は、特に図示しないが、例えば、Ｈ型鋼等によって構成され、鞘管１３，１３の下端から所定の高さ位置において鞘管１３，１３内を直径方向に横切るように配置され、この支承部材が鋼管杭３，３…の杭頭部に支持され、プレキャストコンクリート部材４，４…が鋼管杭３，３…の杭頭部に仮支持できるようになっている。   Although not particularly shown, the support member is made of, for example, H-shaped steel, and is disposed so as to cross the inside of the sheath tubes 13 and 13 in a diametrical direction at a predetermined height position from the lower ends of the sheath tubes 13 and 13. The members are supported by the pile heads of the steel pipe piles 3, 3,..., And the precast concrete members 4, 4,.

補強部材１０ａ〜１０ｄは、図２に示すように、嵌合部８，８を直列配置した直線型１０ａ、嵌合部８，８…を三隅に配置した三角型１０ｂ、嵌合部８，８…を四隅に配置した矩形型１０ｃ又はコ字型１０ｄを備え、その何れかを適宜選択して使用するようになっている。尚、図１（ｂ）及び図２には、各補強部材１０ａ〜１０ｄを識別し易いように便宜上ハッチングを付している。   As shown in FIG. 2, the reinforcing members 10 a to 10 d are a linear type 10 a in which fitting parts 8, 8 are arranged in series, a triangular type 10 b in which fitting parts 8, 8... Are arranged in three corners, and fitting parts 8, 8. .. Are arranged at four corners, and any one of them is appropriately selected and used. In addition, in FIG.1 (b) and FIG. 2, hatching is attached | subjected for convenience so that each reinforcement member 10a-10d may be identified easily.

嵌合部８は、図３に示すように、鋼管杭径よりも大径の円筒状に形成され、鋼管杭３に溶接等によって固定された支持部材１７に支持されるようになっている。   As shown in FIG. 3, the fitting portion 8 is formed in a cylindrical shape larger in diameter than the steel pipe pile diameter, and is supported by a support member 17 fixed to the steel pipe pile 3 by welding or the like.

また、嵌合部８は、その内周部に係止部材１４，１４…が突設され、鋼管杭３，３…には、その外周面にシアキー等の係合凸体１５が突設されており、嵌合部８と鋼管杭３との間にモルタル等の充填材１６が充填されることにより、鋼管杭３に対し嵌合部８が所定高さ位置に強固に固定されるようになっている。   Further, the engaging portion 8 has locking members 14, 14... Projecting from the inner peripheral portion thereof, and the steel pipe piles 3, 3. In addition, by filling a filler 16 such as mortar between the fitting portion 8 and the steel pipe pile 3, the fitting portion 8 is firmly fixed to the steel pipe pile 3 at a predetermined height position. It has become.

係止部材１４，１４…は、図３に示すスタッド状の他、鋼棒材を周方向に溶接したシアキー等であってもよい。   The locking members 14, 14... May be a shear key or the like in which a steel bar is welded in the circumferential direction in addition to the stud shape shown in FIG.

連結補強材９は、それぞれ取り付けられる鋼管杭間３，３の距離に合わせて長さが設定され、杭３，３間の法線直角方向距離と同じ長さの法直方向用連結補強材９ａ、杭３，３間の法線方向距離と同じ長さの法線方向用連結補強材９ｂ、対角線方向に隣り合う杭間距離と同じ長さの対角線用連結補強材９ｃで構成されている。   The length of the connecting reinforcing material 9 is set in accordance with the distance between the steel pipe piles 3 and 3 to be attached, and the connecting reinforcing material 9a for the normal direction has the same length as the normal direction perpendicular distance between the piles 3 and 3. The normal reinforcing link 9b has the same length as the normal distance between the piles 3 and 3, and the diagonal connecting reinforcing material 9c has the same length as the distance between the adjacent piles in the diagonal direction.

各連結補強材９ａ〜９ｃの長さは、本実施例に示すものに限定されず、自由に設定することができ、例えば、法直方向用連結補強材９ａと法線方向用連結補強材９ｂとが同じ長さ、又は、法直方向用連結補強材９ａが法線方向用連結補強材９ｂよりも長いものであってもよい。   The length of each connection reinforcement 9a-9c is not limited to what is shown in a present Example, It can set freely, for example, the normal direction connection reinforcement 9a and the normal direction connection reinforcement 9b May be the same length, or the normal direction connecting reinforcing material 9a may be longer than the normal direction connecting reinforcing material 9b.

そして、各補強部材１０ａ〜１０ｄは、各嵌合部材８，８…の配置と、各嵌合部材８，８間を連結する連結補強材９ａ〜９ｃとの組み合わせによって、嵌合部８，８を直列配置した直線型１０ａ、嵌合部８，８を三隅に配置した三角形型１０ｂ、各嵌合部３，３…を四隅に配置された矩形型１０ｃ又はコ字型１０ｄを成している。   And each reinforcement member 10a-10d is the fitting part 8,8 by the combination of arrangement | positioning of each fitting member 8,8 ... and the connection reinforcement material 9a-9c which connects between each fitting member 8,8. Are arranged in series, a triangular shape 10b in which the fitting portions 8 and 8 are arranged at three corners, and a rectangular shape 10c or a U-shape 10d in which the fitting portions 3, 3. .

尚、各補強部材１０ａ〜１０ｄは、プレキャストコンクリート部材４，４の配置に合わせて、鞘管１３の下側に二段配置に取り付けられるようになっている。   In addition, each reinforcement member 10a-10d is attached to the lower side of the sheath pipe | tube 13 in two steps | paragraph arrangement | positioning according to arrangement | positioning of the precast concrete members 4 and 4. FIG.

次に、具体的な杭支持構造物１の構築方法について説明する。   Next, a specific method for constructing the pile support structure 1 will be described.

初めに、事前の準備として、構築現場の地形や使用可能な起重機船等のクレーン装置の規模等に基づき、梁部５を構成するプレキャストコンクリート部材４，４…の構成を決定し、工場又は陸上のヤードで各プレキャストコンクリート部材４，４…を成形する。   First, as a preliminary preparation, the configuration of the precast concrete members 4, 4... Constituting the beam portion 5 is determined based on the topography of the construction site and the scale of a crane device such as a hoist ship that can be used. Each of the precast concrete members 4, 4.

一方、各プレキャストコンクリート部材４，４…の配置と場所打ちコンクリート部１１，１１…の配置を勘案し、各鋼管杭３，３…間を連結する補強部材を直線型１０ａ、三角型１０ｂ、矩形型１０ｃ又はコ字型１０ｄより適宜選択し、必要な各補強部材１０ａ〜１０ｄを事前に工場等で製作する。   On the other hand, considering the arrangement of the precast concrete members 4, 4... And the placement of the cast-in-place concrete portions 11, 11..., The reinforcing members that connect the steel pipe piles 3, 3. The mold 10c or the U-shaped mold 10d is appropriately selected, and the necessary reinforcing members 10a to 10d are manufactured in advance in a factory or the like.

補強部材１０ａ〜１０ｄの選択は、法線方向及び法直方向で互いに隣り合う鋼管杭３，３…間に場所打ちコンクリート部１１，１１…が介在されるかを確認し、場所打ちコンクリート部１１，１１…下に必ず各補強部材１０ａ〜１０ｄの連結補強部材９ａ〜９ｃが位置し、且つ、最も合理的に補強できるように各補強部材１０ａ〜１０ｄを組み合わせる。   The reinforcement members 10a to 10d are selected by confirming whether the cast-in-place concrete portions 11, 11 ... are interposed between the steel pipe piles 3, 3 ... adjacent to each other in the normal direction and the normal direction. , 11... The connecting reinforcing members 9a to 9c of the reinforcing members 10a to 10d are always located below, and the reinforcing members 10a to 10d are combined so that they can be reinforced most rationally.

例えば、各プレキャストコンクリート部材４，４…が図１に示すように配置される場合、隅部に矩形型１０ｃ及び三角型１０ｂを配置すると、プレキャストコンクリート部材４，４…によって連結される部分にも補強連結材９が配置されるので、直線型を配置することが最も合理的である。   For example, when the precast concrete members 4, 4... Are arranged as shown in FIG. 1, if the rectangular mold 10 c and the triangular mold 10 b are arranged at the corners, the precast concrete members 4, 4. Since the reinforcing connecting member 9 is arranged, it is most reasonable to arrange a linear type.

このように、各場所打ちコンクリート部１１，１１…の配置と各補強部材１０ａ〜１０ｄの形状とを重ね合わせるとともに、隣り合う補強部材１０ａ〜１０ｄの重複等を総合的に考慮し、合理的な配置を決定する。   As described above, the placement of the respective cast-in-place concrete portions 11, 11... And the shapes of the reinforcing members 10a to 10d are overlapped, and the overlapping of the adjacent reinforcing members 10a to 10d is comprehensively taken into consideration. Determine placement.

次に、水底地盤２に鋼管杭３，３…を法線方向及び法直方向にそれぞれ所定の間隔を置いて打設する。   Next, the steel pipe piles 3, 3... Are placed on the water bottom ground 2 at predetermined intervals in the normal direction and the normal direction.

その際、打設された各鋼管杭３，３…は、それぞれ独立して立設された状態にあり、波浪やその他の外力が作用する状態にある。   At that time, each of the steel pipe piles 3, 3... Placed is standing independently and is in a state where waves and other external forces are applied.

そこで、先ず、図４に示すように、下段側の所定の配置に各補強部材１０ａ〜１０ｄを取付け、各鋼管杭３，３…間を連結し、隣り合う鋼管杭３，３を互いに支持させ、且つ、各鋼管杭３，３…間を互いに位置決めさせる。   Therefore, first, as shown in FIG. 4, the reinforcing members 10 a to 10 d are attached to a predetermined arrangement on the lower side, the steel pipe piles 3, 3... Are connected, and the adjacent steel pipe piles 3, 3 are supported with each other. And each steel pipe pile 3, 3, ... is positioned mutually.

補強部材１０ａ〜１０ｄの取り付け作業は、基準となる鋼管杭３，３間に跨るように補強部材１０ａ〜１０ｄを取付け、その鋼管杭３，３を互いに支持させることにより補強した後、補強された鋼管杭３，３…の位置に合わせて法線方向及び法線直角方向で互いに隣り合う鋼管杭３，３…の位置を調整する。   The reinforcing members 10a to 10d were reinforced by attaching the reinforcing members 10a to 10d so as to straddle between the steel pipe piles 3 and 3 serving as a reference, and reinforcing the steel pipe piles 3 and 3 to support each other. The positions of the steel pipe piles 3, 3, ... that are adjacent to each other in the normal direction and the direction perpendicular to the normal line are adjusted in accordance with the positions of the steel pipe piles 3, 3, ....

鋼管杭３，３…の位置調整は、例えば、チェーンブロックの一端を既に補強された鋼管杭３，３…に支持させ、チェーンブロックを介して他方の鋼管杭３，３…の杭頭部を引っ張ることによって位置を合わせる。   The position adjustment of the steel pipe piles 3, 3,... Is performed, for example, by supporting one end of the chain block on the already reinforced steel pipe piles 3, 3 ..., and the pile heads of the other steel pipe piles 3, 3 ... via the chain block. Align by pulling.

そして、その状態で隣り合う鋼管杭３，３の杭頭部間が連結されるように補強部材１０ａ〜１０ｄを取り付ける。   And the reinforcing members 10a-10d are attached so that the pile heads of the adjacent steel pipe piles 3 and 3 may be connected in that state.

そして、補強された鋼管杭３を基準とした位置調整と、補強部材１０ａ〜１０ｄの連結作業とを順次繰り返すことにより図５に示す配置のように各補強部材１０ａ〜１０ｄを取り付ける。   And each reinforcement member 10a-10d is attached like the arrangement | positioning shown in FIG. 5 by repeating the position adjustment on the basis of the reinforced steel pipe pile 3, and the connection operation | work of reinforcement member 10a-10d.

同様に、図５に示すように、下段側に取り付けられた補強材１０ａ〜１０ｄによって補強された杭を基準にして、上段側の所定の配置に各補強部材１０ａ〜１０ｄを取付け、各鋼管杭３，３…間を連結し、隣り合う鋼管杭３，３を互いに支持させ、且つ、各鋼管杭３，３…間を互いに位置決めさせる。   Similarly, as shown in FIG. 5, the reinforcing members 10 a to 10 d are attached to a predetermined arrangement on the upper stage side with reference to the pile reinforced by the reinforcing members 10 a to 10 d attached to the lower stage side, and each steel pipe pile 3, the steel pipe piles 3, 3 are connected to each other, and the steel pipe piles 3, 3 ... are positioned to each other.

そして、各補強部材１０ａ〜１０ｄの各嵌合部８内にモルタル等の充填材１６を充填し、鋼管杭８に各補強部材１０ａ〜１０ｄを固定する。   And the fillers 16, such as mortar, are filled in each fitting part 8 of each reinforcement member 10a-10d, and each reinforcement member 10a-10d is fixed to the steel pipe pile 8. FIG.

次に、各プレキャストコンクリート部材４，４…をクレーン船等によって施工現場まで移送し、プレキャストコンクリート部材４，４…をクレーンによって吊上げ、図６に示すように、鞘管１３，１３の位置を対応する各鋼管杭３，３…に合わせた状態で吊り下ろす。   Next, each precast concrete member 4,4 ... is transferred to a construction site by a crane ship or the like, and the precast concrete members 4,4 ... are lifted by a crane, and the positions of the sheath tubes 13, 13 are corresponded as shown in FIG. Suspend in a state that fits each steel pipe pile 3, 3.

その際、各鋼管杭３，３…間に跨って補強部材１０ａ〜１０ｄが取り付けられているので、各鋼管杭３，３…が所定の間隔に保たれるとともに、互いに支持されて揺動が防止されているので容易に位置合わせでき、効率よくプレキャストコンクリート部材４，４…を吊り下ろすことができる。   At that time, since the reinforcing members 10a to 10d are mounted across the steel pipe piles 3, 3,..., The steel pipe piles 3, 3,. Since it is prevented, it can be easily aligned and the precast concrete members 4, 4... Can be suspended efficiently.

そして、鞘管１３，１３が鋼管杭３，３…の杭頭部の外側に嵌め込まれると、支承部材が杭頭部に支持され、支承部材を介してプレキャストコンクリート部材４，４…が杭に仮支持される。   When the sheath pipes 13, 13 are fitted to the outside of the pile heads of the steel pipe piles 3, 3 ..., the support members are supported by the pile heads, and the precast concrete members 4, 4 ... are formed into the piles via the support members. Temporarily supported.

次に、図６に示すように、プレキャストコンクリート部材４，４…を杭頭部に仮支持させた状態で、鞘管１３，１３と鋼管杭３，３…との間の隙間をグラウト等の充填材で充填し、鋼管杭３，３…の杭頭部にプレキャストコンクリート部材４，４…を接合する。   Next, as shown in FIG. 6, with the precast concrete members 4, 4... Temporarily supported on the pile heads, the gap between the sheath pipes 13, 13 and the steel pipe piles 3, 3,. The precast concrete members 4, 4... Are joined to the pile heads of the steel pipe piles 3, 3,.

また、必要に応じて鋼管杭の杭頭部に場所打ちコンクリートによる中詰めコンクリートを打設してプレキャストコンクリート部材４，４…の設置が完了する。   Further, if necessary, the filling cast concrete made by cast-in-place concrete is placed on the pile head of the steel pipe pile to complete the installation of the precast concrete members 4, 4.

そして、鋼管杭３，３…毎に上述したプレキャストコンクリート部材４，４…の接合作業を行った後、隣り合うプレキャストコンクリート部材４，４間に鉄筋等を配設するとともに型枠を設置し、図１に示すように、場所打ちコンクリートを打設して各プレキャストコンクリート部材４，４…間を連結する場所打ちコンクリート部１１，１１…を形成する。   And after performing the joining operation | work of the precast concrete member 4,4 ... mentioned above for every steel pipe pile 3,3 ..., while installing a rebar etc. between adjacent precast concrete members 4,4, installing a formwork, As shown in FIG. 1, cast-in-place concrete is cast to form cast-in-place concrete portions 11, 11... Connecting the precast concrete members 4, 4.

その際、場所打ちコンクリート部１１の両側に配置されるプレキャストコンクリート部材４，４が支持される鋼管杭３，３間に必ず補強部材１０ａ〜１０ｄの補強連結部材９が跨って配置されているので、プレキャストコンクリート部材４，４間が所定の間隔に保持され、誤差なく場所打ちコンクリートを打設することができる。   At that time, the reinforcing connecting members 9 of the reinforcing members 10a to 10d are always disposed across the steel pipe piles 3 and 3 on which the precast concrete members 4 and 4 arranged on both sides of the cast-in-place concrete portion 11 are supported. The space between the precast concrete members 4 and 4 is maintained at a predetermined interval, and cast-in-place concrete can be placed without error.

そして、場所打ちコンクリートを養生固化させることにより、鋼管杭３，３…に支持された格子状の梁部５が形成され、梁部５上に場所打ちコンクリート又はプレキャスト床板を設置することにより床版６を設置し、杭支持構造物１が構築される。   Then, the cast-in-place concrete is cured and solidified to form a lattice-like beam portion 5 supported by the steel pipe piles 3, 3... And the cast-in-place concrete or precast floor board is installed on the beam portion 5. 6 is installed and the pile support structure 1 is constructed.

尚、補強部材１０ａ〜１０ｄの態様は、上述の実施例に限定されず、例えば、３以上の嵌合部８，８…を直列配置し、各嵌合部間を補強連結材９で連結したもの等であってもよい。   In addition, the aspect of reinforcement member 10a-10d is not limited to the above-mentioned Example, For example, the three or more fitting parts 8,8 ... are arrange | positioned in series, and each fitting part was connected with the reinforcement connection material 9. FIG. The thing etc. may be sufficient.

また、上述の実施例では、杭として鋼管杭を例に説明したが、上部工を支持する杭は鋼管杭に限定されるものではない。   Moreover, in the above-mentioned Example, although the steel pipe pile was demonstrated to the example as a pile, the pile which supports a superstructure is not limited to a steel pipe pile.

さらに、上述の実施例では、プレキャストコンクリート部材４を隣り合う鋼管杭３，３に跨って支持させる形状とした例について説明したが、プレキャストコンクリート部材は、鋼管杭毎に支持させる形状のものでもよく、３以上の複数の鋼管杭に支持させる形状であってもよい。   Furthermore, although the above-mentioned Example demonstrated the example made into the shape made to support the precast concrete member 4 straddling the adjacent steel pipe piles 3 and 3, a precast concrete member may be a shape made to support for every steel pipe pile. The shape supported by three or more steel pipe piles may be sufficient.

１ 杭支持構造物
２ 水底地盤
３ 鋼管杭
４ プレキャストコンクリート部材
５ 梁部
６ 床版部
７ 上部工
８ 嵌合部
９ 補強連結材
１０ 補強部材
１１ 場所打ちコンクリート部
１２ プレキャストコンクリートブロック
１３ 鞘管
１４ 係止部材
１５ 係合凸体 DESCRIPTION OF SYMBOLS 1 Pile support structure 2 Submerged ground 3 Steel pipe pile 4 Precast concrete member 5 Beam part 6 Floor slab part 7 Upper work 8 Fitting part 9 Reinforcement connecting material 10 Reinforcement member 11 Cast-in-place concrete part 12 Precast concrete block 13 Sheath pipe 14 Engagement Stop member 15 engaging convex body

Claims (3)

構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させる杭支持構造物の構築方法において、
前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する一定長さの連結補強材とを備えた補強部材を使用し、
隣り合う杭間を前記補強部材で連結し、該隣り合う杭を互いに支持させて補強した後、前記杭に前記プレキャストコンクリート部材を接合させるとともに、該プレキャストコンクリート部材間を現場打ちコンクリートで連結することを特徴とする杭支持構造物の構築方法。 In the construction method of a pile support structure in which a precast concrete member is joined to the pile head after driving a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed,
Using a reinforcing member provided with a plurality of fitting portions that fit with the piles, and a connection reinforcing material of a certain length that connects between the fitting portions,
The adjacent piles are connected with the reinforcing members, and the adjacent piles are supported and reinforced, and then the precast concrete members are joined to the piles and the precast concrete members are connected with the cast-in-place concrete. The construction method of the pile support structure characterized by this. 前記補強部材は、嵌合部を直列配置した直線型、嵌合部を三隅に配置した三角形型、嵌合部を四隅に配置した矩形型又はコ字型の何れか一を前記場所打ちコンクリートの位置に合わせて適宜選択して使用する請求項１に記載の杭支持構造物の構築方法。   The reinforcing member is a linear type in which fitting parts are arranged in series, a triangular type in which fitting parts are arranged in three corners, a rectangular type in which fitting parts are arranged in four corners, or a U-shaped type. The method for constructing a pile support structure according to claim 1, wherein the pile support structure is appropriately selected and used according to a position. 構築する杭支持構造物の法線方向及び法線直角方向に間隔をおいて複数の杭を打設した後、その杭頭部にプレキャストコンクリート部材を接合させて構築される杭支持構造物の隣り合う杭間を連結する補強部材において、
前記杭と嵌合する複数の嵌合部と、該嵌合部間を連結する連結補強材とを備え、
該連結補強材は、前記杭間の法線方向距離と同じ長さの法線方向用連結補強材、杭間の法線直角方向距離と同じ長さの法直方向用連結補強材及び／又は対角線方向に隣り合う杭間距離と同じ長さの対角線用連結補強材で構成され、前記嵌合部を直列配置した直線型、前記嵌合部を三隅に配置した三角形型、前記各嵌合部を四隅に配置された矩形型又はコ字型に形成されていることを特徴とする補強部材。 Next to a pile support structure constructed by placing a plurality of piles at intervals in the normal direction and normal direction of the pile support structure to be constructed, and then joining a precast concrete member to the pile head In the reinforcing member that connects the matching piles,
A plurality of fitting portions to be fitted to the pile, and a connection reinforcing material for connecting the fitting portions;
The connection reinforcing material includes a normal direction connection reinforcing material having the same length as the normal direction distance between the piles, a normal direction connecting reinforcing material having the same length as the normal direction perpendicular distance between the piles, and / or It is composed of a diagonal connecting reinforcement material having the same length as the distance between piles adjacent to each other in the diagonal direction, a linear type in which the fitting parts are arranged in series, a triangular type in which the fitting parts are arranged in three corners, and the respective fitting parts The reinforcing member is formed in a rectangular shape or a U-shape disposed at four corners.
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