基于遗传算法与有限元联合反演法的岩体初始应力场反演分析

针对传统线性优化反演方法中的不足，采用遗传算法与有限元联合反演法，将有限元计算作为一个单独模块嵌入遗传算法程序中，对非线性岩体初始应力场进行了求解.同时，结合西南地区某水电站坝址区给出了用该方法反演出的初始地应力场计算结果，通过地应力测点计算值和实测值的对比分析，其吻合程度较好，表明此方法是可行的，对类似工程具有参考意义.

Back analysis of initial stress field of rock mass based on the methodology

Firstly, aiming at the deficiency of traditional linear optimization methods for back analysis, an improved methodology combining genetic algorithm with finite element method is adopted, in which the finite element analysis is embedded in genetic algorithm as a single module and initial geostress field of rock mass is got by nonlinear solution. And then this methodology is applied to the back analysis in dam site zone of a certain hydropower station in the southwest of China. It is shown that the calculated results are in good agreement with the measured ones. The results have also demonstrated that the methodology in this study is feasible and it is of great reference significance to similar projects.