圆弧滑动的稳定性分析及软件实现

Stability Analysis of Circular Slip and Software Implementation

圆弧滑动边坡的稳定性验算最大的困难是寻找最危险的滑动圆弧,也就是确定最危险滑动圆弧的圆心位置。基于圆弧滑动面的假定,提出了一种运用模式搜索法确定边坡最危险滑动面及其对应的最小安全系数的方法。以Felle-nius条分法和简化Bishop法为基础,运用VB结合CAD的二次开发功能,编制出程序来搜索圆弧滑动边坡最危险滑动圆弧的圆心,并用实例验证了该程序的可靠性,同时将两种不同方法的分析效果与FLAC进行对比,为圆弧滑动边坡稳定性分析和处理提供了重要的依据。

In the checking computation of stability of circular sliding slopes, it difficult to search for the critical circular slid- ing face ,which is to find the coordinates of the center of the critical circular slip surface. Based on the assumption of circular slip surface, a pattern search method to determine the most dangerous slip surface of slope and the corresponding minimum safety factor was proposed. Based on Fellenius slice method and simplified Bishop method, VB - language based computer program was written to contact with the secondary development function of CAD so as to search for the safety factor and the coordinates of the center of the critical circular slip surface, and the reliability of the program was demonstrated with a practical example. In addition, the analysis results of the two different methods were com pared with the one of FLAC. It could provide basis for the stability analysis and stabilization design for circular slip slopes.