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针对岩体初始地应力场反演分析需采用多次正向计算、效率较低、优化程序与正向数值计算程序需大量耦合等问题,利用FLAC3D内嵌的FISH语言将FLAC3D正向数值计算与粒子群优化算法相结合编写了程序,以山东文登抽水蓄能电站地下洞室的初始地应力场为例,分析了反演的整个过程。结果表明,该法简单易实现、收敛速度较快,精度较高,为岩体初始应力场的反演提供了一种新思路。
In order to reverse the initial stress field of rock mass, several forward calculation, low efficiency and large coupling between optimization program and forward numerical calculation procedure are needed. The FLAC3D inline FISH language is used to calculate FLAC3D positive numerical value and Particle Swarm Optimization (PSO) algorithm was used to compile the program. Taking the initial geostress field of the underground cavern in Wendeng Pumped Storage Station of Shandong as an example, the whole process of inversion was analyzed. The results show that the method is simple and easy to implement, the convergence speed is faster and the precision is higher, which provides a new idea for the inversion of the initial stress field of rock mass.