Patent ID: 8402713
Filing Date: 2013-03-26
Classification: G21C,Y02E

Abstract:
1. A foundation for a building in nuclear facilities, comprising: a lower foundation provided on a ground; and an upper foundation provided above the lower foundation with a base isolating device interposed therebetween, wherein the upper foundation includes a bottomed steel-plate form, a hull structure arranged in the steel-plate form, and a concrete part filled in the steel-plate form, the hull structure includes a transverse reinforcing rib that extends on a portion of a bottom of the steel-plate form parallel to the ground and a longitudinal reinforcing rib that extends on the portion of the bottom of the steel-plate form parallel to the ground so as to be orthogonal to the transverse reinforcing rib, and the transverse reinforcing rib and the longitudinal reinforcing rib are made of a T-shaped steel whose cross-section is formed in a T-shape, wherein a section of the transverse reinforcing rib extending from said bottom, which forms a top surface of the T-shape of said T-shaped steel, is parallel to said portion, and a section of the longitudinal reinforcing rib extending from said bottom, which forms a top surface of the T-shape of said T-shaped steel, is parallel to said portion, and wherein the hull structure is constituted in a lattice shape by a plurality of longitudinal reinforcing ribs arranged so as to extend in a horizontal direction and a plurality of transverse reinforcing ribs arranged so as to extend in a vertical direction.