| 摘要 |
PROBLEM TO BE SOLVED: To simply predict and calculate, beforehand, the deformed amount of the partially improved ground after construction. SOLUTION: The entire part of the partially improved ground is constructed as the assembly of unit frequency structures each formed of an improved body in a predetermined area and an original ground therearound. The rigidity of the unit frequency structures is equivalent to the entire part of the partially improved ground. The relation between the equivalent rigidity and an improvement rate is indicated by a facilitated chart while using, as parameters, the aspect ratio of the unit frequency structures, rigidity of the improved body, and rigidity of the original ground. The improved rate and the equivalent rigidity corresponding thereto are obtained according to the facilitated chart. The deformed amount of the partially improved ground is calculated based on the equivalent rigidity and the external force acting on the entire part of the partially improved ground. The equivalent rigidity is obtained based on a mathematical homogenization theory. The deformed amount is calculated by a two-dimensional elastic finite element method, or the entire part of the partially improved ground is modeled on a shearing rod. COPYRIGHT: (C)2009,JPO&INPIT |
