The generator sockets construction and the closely-related stability problem of lower side wall of Shuibuya Underground Powerhouse are key problems to solve in the powerhouse construction. Synthetically utilizing orthogonal design

three dimensional numerical simulation

genetic algorithm and support vector machine

the back analysis process for Shuibuya Underground Powerhouse is proposed. According to the process

using the monitoring data of upper sixth construction step

the mechanical parameters of surrounding rocks are back analyzed. Based on the mechanical parameters

the subsequent sockets construction schemes are numerically simulated and the optimal one is selected

so as to keep the stability of high side wall and generator sockets surrounding rocks. The optimizing result has guide meaning to the construction.