EARTHQUAKE-RESISTANT PILE FOUNDATION STRUCTURE AND EARTHQUAKE-RESISTANT PILE

摘要

PROBLEM TO BE SOLVED: To improve aseismicity by disposing a foundation pile in upright into a pile pit having a diameter larger than the outside diameter of the foundation pile and filling a section between the pile pit and the pile with a liquefied viscoelastic material displaying rubber elasticity after curing. ;SOLUTION: A pile pit 41 having a diameter slightly larger than the outside diameter of a foundation pile 2 supporting a structure 1 is excavated, and the pile 2 is erected vertically at approximately the center of the pile 41. A section between the pit 41 and the pile 2 is filled with a liquefied viscoelastic material 31 displaying rubber elasticity after curing, and a rubber elastic layer 3 is formed. The layers 3 are formed at several places through regular intervals in the axial direction of the pile 2 in place of the rubber elastic layer 3. A cylindrical rubber elastic body, which has a hole having a diameter slightly smaller than the outside diameter of the pit 2 and to which a slit is formed in the radial direction, is installed to the pile 2 and buried into the pit 41. An external foundation pile is buried into an external foundation-pile pit, the pile 2 is erected at approximately the center of the external foundation pile, and a section between the external foundation pile and the pile 2 is filled with a liquefied polymer displaying rubber elasticity after curing or the mixture of the polymer and granular elastic fillers. Accordingly, vibrations and impacts from the structure and a ground can be relaxed.;COPYRIGHT: (C)2000,JPO