基于智能反分析的水布垭电站地下厂房机窝施工方案优化

采用正交设计、三维数值模拟、遗传算法与支持向量机,建立了清江水布垭电站地下厂房的智能反分析流程.按照上述流程,利用前6层开挖的现场监测信息对有关岩层的力学参数进行反分析,根据反分析的参数对后续的机窝施工进行数值模拟计算和方案优化.推荐的机窝施工方案采用槽挖方式,同时应用锚桩、软岩置换、锚喷支护等措施,兼顾了高边墙和机窝岩台的稳定性.优化结果对厂房施工具有重要的指导作用.

Optimizing generator socket construction schemes of Shuibuya Underground Powerhouse based on intelligent back analysis

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.