基于边坡稳定性计算方法比较分析

Comparative Analysis on the Calculation Methods Based on Slope Stability

摘要:

将强度折减法应用于边坡稳定性分析中，折减土体强度，代入有限元程序进行计算，直至计算不收敛，此时的折减系数即为安全系数。结合工程实例，将强度折减法应用于边坡稳定性的分析，利用瑞典圆弧法，结合岩土工程设计类软件天汉以及有限元分析软件ABAQUS分析边坡稳定性，并对安全系数进行对比，3种计算方法得出的安全系数差别不大，安全系数精度都能满足工程要求。

关键词:强度折减法;边坡稳定性;安全系数;有限元;岩土工程

Abstract:

Strength reduction method is applied in the slope stability analysis, the soil strength is reduced and calculated by finite element program until the calculation convergence. At this time, the reduction coefficient is the safety coefficient. Combining with the engineering case, the slope stability is analyzed using the strength reduction method; meanwhile, also using Swedish arc method and with the geotechnical engineering design software Tianhan as well as the finite element analysis software ABAQUS to analyze slope stability and compared the safety coefficient. It is concluded that the safety coefficients obtained by these 3 calculation methods have little difference and the coefficient accuracy can meet the engineering requirements.

Key words:strength reduction; slope stability; safety coefficient; finite element; geotechnical engineering