SOIL IMPROVEMENT FOUNDATION CONSTRUCTION METHOD IN SOFT FOUNDATION

摘要

PROBLEM TO BE SOLVED: To construct a soil improved foundation which has high safety for the ground subsidence or an earthquake and is inexpensive in a short term of works by establishing the foundation with strength and scale for supporting the vertical load and horizontal force of a structure, and complementing a pile body in the range of a soil improved foundation to be used jointly. ;SOLUTION: The vertical sectional area and the lower end depth of a soil improved foundation 1 are set in consideration of the size of the plane area in such a manner that the allowable support force of a soft foundation 15 exceeds the load of a structure 2. The load of the structure 2 above the earth removable weight based on the penetration depth H of a floating foundation 2a is transmitted to the ground to reduce the shearing stress and tensile stress generated in the improved foundation 1. Accordingly, the occurrence of cracks, high bending and shearing rigidity of the foundation itself can be utilized as a part of the rigidity of the foundation slab 2b for a long period of time. Thus, the foundation is behaved as a high-rigidity raft foundation 1 taking the lower end of the integrated improved foundation 1 as the base so as to obtain the foundation with smaller differential settlement and high stability.;COPYRIGHT: (C)1999,JPO