CONSTRUCTION METHOD FOR IMPROVING FOUNDATION SUBSOIL

摘要

PROBLEM TO BE SOLVED: To provide a construction method for improving a foundation subsoil reducing the possiblities of differential settlement and hoop tensile breakdown, even without improving the portion of a foundation near its center. SOLUTION: This construction method for improving the foundation subsoil of a structure improves the foundation subsoil 2 of the structure 1 so that it is approximately in the shape of a ring except near its center to enhance the strength of this improved area 3. At least the lower portion of the improved area 3 gets smaller in inside diameter and thicker toward the bottom.