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介绍了确定边坡稳定安全系数和判别边坡临界稳定状态的方法。为便于强度折减法与刚体极限平衡法进行比较,以典型单滑动面边坡数值计算为例,比较分析了滑动面材料屈服准则、自重应力场施加方法、计算模型单元网格尺寸和边界范围对边坡稳定安全系数的影响规律,提出了数值模拟建议,以提高已知滑动面岩质边坡数值计算的精度。结果表明,强度折减法较为合理,超载法在特殊情况下可能无法得到安全系数。
The method of determining the safety factor of slope stability and judging the critical stability state of slope is introduced. In order to compare the strength reduction method with the rigid body limit equilibrium method, taking the typical single sliding surface slope numerical calculation as an example, the yield criterion of the sliding surface material and the application of self-weight stress field are comparatively analyzed and the model grid size and boundary area pair are calculated The law of slope stability safety factor is proposed, and numerical simulation suggestion is proposed to improve the accuracy of numerical calculation of rock slope with known sliding surface. The results show that the strength reduction method is reasonable, and the overloading method may not obtain the safety factor under special circumstances.