关于Sarma法中条间剪力方向的研讨

Discussion about the Direction of Interslice Shear Force in Sarma's Method

基于调动条间剪力的实际考虑 ,分析了Sarma法中条间剪力方程的局限性 ,阐明了Sarma法中考虑条间剪力的两种可能方向的必要性 ,给出了条间剪力方向的判断准则 ,确保了所求解是运动许可的。结合算例 ,讨论了条块和滑动面的几何形状的变化对计算安全系数的影响。

Based on a realistic consideration of mobilization of interslice shear forces, the limitations of interslice shear force equation in Sarma's method are analyzed in this paper. The necessity of considering two possible directions of interslice shear force in Sarma's method is clarified. The criterion determining the direction of interslice shear force is given. It ensures kinematically admissible solutions. The influence of the geometry of the slices and the slip surface on safety factor is discussed by a case study.