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PILE HEAD CONNECTION STRUCTURE, AND CONSTRUCTION METHOD OF PILE HEAD CONNECTION STRUCTURE
To provide a pile head connection structure reducing bending moment applied to a pile head of a cast-in-place concrete pile and improving compression resistant property, and to provide a construction method of a pile head connection structure.SOLUTION: A pile head connection structure connects a pile head of a cast-in-place concrete pile 1 with a foundation portion (a footing 5, a foundation beam 6). The pile head connection structure comprises: a concrete body 30 disposed underground; a reinforcement gabion 10 disposed inside the concrete body 30; a connection frame material 21 disposed at a shaft center side of the cast-in-place concrete pile 1 with respect to an outer peripheral reinforcement (a main reinforcement 12) of the reinforcement gabion 10 extending upwardly from the concrete body 30 and embedded in the foundation portion; an inside tension reinforcement 22 downwardly extending from an inside of the connection frame material and embedded in the concrete body; and an outside tension reinforcement 23 extending upwardly from an outside of the connection frame material and embedded in the foundation portion. The pile head connection structure does not include a reinforcement straddling the concrete body and the foundation portion at the outside of the connection frame material.SELECTED DRAWING: Figure 1
【課題】 場所打ちコンクリート杭の杭頭に作用する曲げモーメントを小さくすると共に、耐圧縮性を向上させた杭頭接続構造及び杭頭接続構造の施工方法を提供する。【解決手段】 杭頭接続構造は、場所打ちコンクリート杭１の杭頭と基礎部（フーチング５，基礎梁６）とを接続する。この杭頭接続構造は、地中に配置されるコンクリート体３０と、コンクリート体３０の内部に配置される鉄筋籠１０と、コンクリート体３０から上方に延在して基礎部に埋設される、鉄筋籠１０の外周筋（主筋１２）より、場所打ちコンクリート杭１の軸心側に配置される接続枠材２１と、接続枠材の内側から下方に延在してコンクリート体に埋設される内側引張鉄筋２２と、接続枠材の外側から上方に延在して基礎部に埋設される外側引張鉄筋２３と、を備える。杭頭接続構造は、接続枠材の外側には、コンクリート体と基礎部に跨る鉄筋を有しない。【選択図】図１
PILE HEAD CONNECTION STRUCTURE, AND CONSTRUCTION METHOD OF PILE HEAD CONNECTION STRUCTURE
To provide a pile head connection structure reducing bending moment applied to a pile head of a cast-in-place concrete pile and improving compression resistant property, and to provide a construction method of a pile head connection structure.SOLUTION: A pile head connection structure connects a pile head of a cast-in-place concrete pile 1 with a foundation portion (a footing 5, a foundation beam 6). The pile head connection structure comprises: a concrete body 30 disposed underground; a reinforcement gabion 10 disposed inside the concrete body 30; a connection frame material 21 disposed at a shaft center side of the cast-in-place concrete pile 1 with respect to an outer peripheral reinforcement (a main reinforcement 12) of the reinforcement gabion 10 extending upwardly from the concrete body 30 and embedded in the foundation portion; an inside tension reinforcement 22 downwardly extending from an inside of the connection frame material and embedded in the concrete body; and an outside tension reinforcement 23 extending upwardly from an outside of the connection frame material and embedded in the foundation portion. The pile head connection structure does not include a reinforcement straddling the concrete body and the foundation portion at the outside of the connection frame material.SELECTED DRAWING: Figure 1
【課題】 場所打ちコンクリート杭の杭頭に作用する曲げモーメントを小さくすると共に、耐圧縮性を向上させた杭頭接続構造及び杭頭接続構造の施工方法を提供する。【解決手段】 杭頭接続構造は、場所打ちコンクリート杭１の杭頭と基礎部（フーチング５，基礎梁６）とを接続する。この杭頭接続構造は、地中に配置されるコンクリート体３０と、コンクリート体３０の内部に配置される鉄筋籠１０と、コンクリート体３０から上方に延在して基礎部に埋設される、鉄筋籠１０の外周筋（主筋１２）より、場所打ちコンクリート杭１の軸心側に配置される接続枠材２１と、接続枠材の内側から下方に延在してコンクリート体に埋設される内側引張鉄筋２２と、接続枠材の外側から上方に延在して基礎部に埋設される外側引張鉄筋２３と、を備える。杭頭接続構造は、接続枠材の外側には、コンクリート体と基礎部に跨る鉄筋を有しない。【選択図】図１
PILE HEAD CONNECTION STRUCTURE, AND CONSTRUCTION METHOD OF PILE HEAD CONNECTION STRUCTURE
杭頭接続構造及び杭頭接続構造の施工方法
FURUGAITO YASUSHI (author) / KAWASAKI KENJIRO (author) / KASAI YUKI (author)
2021-03-18
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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