VIBRATION-ISOLATING FOUNDATION PILE AND EXTENSION PILE

摘要

PROBLEM TO BE SOLVED: To absorb displacement by force in the horizontal direction applied to a foundation or a foundation pile by a hinge, and to prevent the effect of displacement in the mutual foundation and foundation piles by connecting the foundation and foundation pile of a building by an extension pile having hinge structure. ;SOLUTION: The lower ends of an upper pile 2 and an intermediate pile 3 are formed in spherical projecting sections 6, the upper ends of the intermediate pile 3 and a lower pile 4 are formed in recessed sections 7 having the same curvature as the projecting sections 6, and the surfaces of the projecting sections 6 and the recessed sections 7 are covered with a material having an excellent slide. An extension pile 5 is formed from the upper pile 2, the intermediate pile 3 and the lower pile 4 by fitting the projecting sections 6 into the recessed sections 7, and connecting sections are covered with cylindrical bands 12 for holding panel points consisting of a material easy to be displaced so as not to be slipped off. The lower pile 4 is placed on a foundation pile 1, and cylindrical joints 13, 13 made of a metal are welded to the lower pile 4, the periphery of the foundation pile 1 is buried with mortar, and the periphery of the extension pile 5 is covered with a member 14 easy to be displaced in width corresponding to the rolling displacement of an earthquake ground motion. Concrete for the foundation 15 of a building is placed to the upper section of the upper pile 2 through a member 16 easy to be displaced, and the foundation 15 is fixed and covered with a member 17 easy to be displaced.;COPYRIGHT: (C)1997,JPO