采用瑞典法、简化Bishop法和简易Morgenstern-price方法进行了给定土体参数空间变异边坡截面的圆弧滑面安全系数计算,并引入模拟退火法进行边坡的全局危险滑面搜索.计算结果表明,圆弧滑面假设下模拟退火全局扫描算法能以较好的精度完成土体参数空间变异边坡的极限滑面搜索计算.瑞典法计算精度较简化Bishop法和简易Morgenstern-price法相对较差;简化Bishop法和简易Morgenstern-price法的计算精度接近,但是简化Bishop法的计算效率较高,简易Morgenstern-price法计算过程中存在冗余迭代计算.采用简化Bishop法和模拟退火相结合的边坡圆弧极限滑面搜索算法能够同时兼顾计算精度和效率,推荐优先使用.%Assumption of circular slip surface is adopted to calculate safety factor of slope section with spatial variability of soil property.The Fellenius method,Simplified Bishop method and Morgenstern-Price method are all integrated with the simulated annealing algorithm(SAA)respectively to search for the global critical slip surface.The results show that,circular slip surface cooperated with the SAA could locate the global slip surface of spatial variable slope with enough precision.However,the precision of Fellenius method is not as good as the simplified Bishop method and the simplified Morgenstern-Price method.The simplified Bishop method has the advantageous of efficiency to the simplified Morgenstern-Price method who preserves tedious iterative calculation,though they possess the similar computation precision.Taken into consideration of both the precision and efficiency,the union of simplified Bishop method and the SAA is recommended prior to be used for locating the global slip surface of the slope with spatial variability.
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