A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a structure of a pile head joining part that reduces bending moment that is caused in a head of a precast concrete pile when an earthquake occurs, and that achieves a resistance function against pull-out force that is applied to an upper structure on a footing.SOLUTION: A pile head joining structure comprises a first steel cap (28) having a top part and a side part, which covers and is fixed on a head (12) of a precast concrete pile, and, a second steel cap (30) integrated with a footing (18), which covers the first cap. The second cap has a top part (36) abutting on a top part (32) of the first cap and a side part (38) defining a space (40) that allows the head of the precast concrete pile to rotate when an earthquake occurs. The inside of the side part of the second cap has a cylindrical surface (46) where the first cap comes into contact with a location (b) on a boundary between its top part and side part when horizontal displacement of the footing is within a setting range of 1 to 8 cm at the time of an earthquake.SELECTED DRAWING: Figure 1
【課題】地震時に既製コンクリート杭の頭部に生じる曲げモーメントを低減し、また、フーチング上の上部構造に加わる引き抜き力に対する抵抗機能を発揮する杭頭の接合部の構造を提供すること。【解決手段】杭頭の接合構造は、既製コンクリート杭の頭部(12)に被せられかつ固定された、頂部及び側部を有する鋼製の第１のキャップ(28)と、第１のキャップに被せられた、フーチング(18)と一体をなす鋼製の第２のキャップ(30)とを含む。第２のキャップは第１のキャップの頂部(32)に接する頂部(36)及び地震時における既製コンクリート杭の頭部の回転を許す空間(40)を規定する側部(38)を有する。第２のキャップの側部は、その内部に、地震時における前記フーチングの水平変位が１〜８ｃｍの設定範囲内にあるときに第１のキャップがその頂部と側部との境界上の一箇所(b)において接触する円筒面(46)を有する。【選択図】図１
PROBLEM TO BE SOLVED: To provide a structure of a pile head joining part that reduces bending moment that is caused in a head of a precast concrete pile when an earthquake occurs, and that achieves a resistance function against pull-out force that is applied to an upper structure on a footing.SOLUTION: A pile head joining structure comprises a first steel cap (28) having a top part and a side part, which covers and is fixed on a head (12) of a precast concrete pile, and, a second steel cap (30) integrated with a footing (18), which covers the first cap. The second cap has a top part (36) abutting on a top part (32) of the first cap and a side part (38) defining a space (40) that allows the head of the precast concrete pile to rotate when an earthquake occurs. The inside of the side part of the second cap has a cylindrical surface (46) where the first cap comes into contact with a location (b) on a boundary between its top part and side part when horizontal displacement of the footing is within a setting range of 1 to 8 cm at the time of an earthquake.SELECTED DRAWING: Figure 1
【課題】地震時に既製コンクリート杭の頭部に生じる曲げモーメントを低減し、また、フーチング上の上部構造に加わる引き抜き力に対する抵抗機能を発揮する杭頭の接合部の構造を提供すること。【解決手段】杭頭の接合構造は、既製コンクリート杭の頭部(12)に被せられかつ固定された、頂部及び側部を有する鋼製の第１のキャップ(28)と、第１のキャップに被せられた、フーチング(18)と一体をなす鋼製の第２のキャップ(30)とを含む。第２のキャップは第１のキャップの頂部(32)に接する頂部(36)及び地震時における既製コンクリート杭の頭部の回転を許す空間(40)を規定する側部(38)を有する。第２のキャップの側部は、その内部に、地震時における前記フーチングの水平変位が１〜８ｃｍの設定範囲内にあるときに第１のキャップがその頂部と側部との境界上の一箇所(b)において接触する円筒面(46)を有する。【選択図】図１
STRUCTURE OF PILE HEAD JOINING PART
杭頭接合部の構造
ENDO MASAMI (author)
2018-04-05
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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