| 摘要 |
PROBLEM TO BE SOLVED: To provide a pile foundation structure used for a structure such as a building which can make the diameter of the pile small by reducing bending moment applied to a pile, which can resist a pulling-out force to a certain amount, and which can significantly reduce muddy water/discharged surplus soil. SOLUTION: The pile foundation structure having no foundation beams is constituted by a plurality of horizontal beams 2 and piles 3 such as a plurality of steel-pipe piles having a wing and a pulling-out resistance mechanism. The horizontal beams 2 are joined to a pedestal 1a of a steel frame pillar 1 supporting a structure of a building or the like, and are extended horizontally from the pedestal in the radial direction. Then the piles 3 are tightly connected to the tip of the horizontal beams, and are extended downward. The bending moment, a shearing force and an axial force, which are applied to the steel frame pillar, are transmitted to the plurality of piles having the pulling-out resistance mechanism through the medium of a plurality of horizontal beams arranged from the pedestal of the pillar in the radial direction. COPYRIGHT: (C)2008,JPO&INPIT
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