滑面正应力假设的边坡安全系数计算方法的适用性探讨

The Discussion About the Adaptability of the Stability Analytical Method Based on the Pre-Definition of the Normal Stress on the Slip Surface

对滑面正应力假设的安全系数计算方法中滑面初始应力的假定方法进行了探讨,利用随机变量模拟了不同的滑面正应力初始值分布,通过对典型算例的计算分析发现,该方法适用于圆弧滑动面的安全系数计算,其结果与其他极限平衡方法相差不大,对非圆弧滑动面,尤其是相邻条块存在较大转折的非圆弧滑动面而言,该法存在较大误差.

The assumption of initial normal stress in the stability analytical method based on the pre-definition of the normal stress on the slip surface was studied using random variables. The adaptability of this method to typical slopes has shown that this method can be used for the solutions to circular slip surfaces and the results have good agreement with those by common limit equilibrium methods. However, for the non-circular slip surfaces containing larger difference between adjacent slices, this method can yield erroneous results.