基于模拟退火算法的边坡最小安全系数全局搜索方法

GLOBAL SEARCH ALGORITHM OF MINIMUM SAFETY FACTOR FOR SLOPE STABILITY ANALYSIS BASED ON ANNEALING SIMULATION

基于改进的模拟退火算法和边坡稳定计算的简化Bishop算法,建立了边坡稳定分析最小安全系数全局搜索方法。该方法能够同时搜索出边坡的最小安全系数和与之相对应的临界滑移面的位置。可以应用到任意边坡几何形状、不同岩土分层、伴随孔隙水压力以及有外荷载的情况。研究表明,所建立的方法能够解决边坡最小安全系数全局搜索问题,从而有效避免局部最优问题。

Based on the modified annealing simulation and simplified Bishop method for computing slope stability,an effective global minimization algorithm is presented for searching the minimal safety factor. The algorithm can simultaneously determine the minimal safety factor and the corresponding slip surface,and be applied to slopes with any geometry,layering,pore pressure and external load distribution. The application of the algorithm to slope stability problems shows that it can be used to search the global minimal safety factor for slope stability analysis by getting rid of local minimization.