为修正现行规范中安全系数的取值,以巴东县学堂坪滑坡为例,基于可靠度理论,利用Matlab软件编制了改进的传递系数法、罗厄法、简化的简布法、美国陆军工程师团法及蒙特卡洛法程序,探讨了滑坡安全系数与破坏概率之间的关系,并以破坏概率30%时对应的安全系数作为改进的安全系数。结果表明,改进的安全系数随稳定系数同幅变化,建议以改进的安全系数作为滑坡稳定性评价的标准。 In order to correct the value of the safety factor in the current code, taking the Pingtang landslide as an example, based on the reliability theory, the improved transfer coefficient method, Roehart method, simplified Jane cloth method and the United States Army Engineer Group method and Monte Carlo method, the relationship between the safety factor of landslide and the failure probability is discussed, and the safety factor corresponding to 30% probability of destruction is taken as the improved safety factor. The results show that the improved safety factor changes with the same amplitude with the stability factor. It is suggested that the improved safety factor be used as the criterion for landslide stability assessment.