Abstract: As a prime means of analysis of rehabihty index，JC method has been adaptable to calculate the reliability index whose random variable distributes freely．The concrete steps and iterative computing process of JC method are introduced and applied to analyze the reliability index in slope stability．The engineering example verifys the feasibility and the high precision of the JC method which has been used in the analysis of reliability index in slope stability under the model analysis and iteratire computation through the soft ware of Excel．

Key words: slope stability, JC method , reliability index JB, reliability, failure probability

摘要： 结构的可靠度指的是结构或构件在规定的时间内，在规定的条件下具备规定功能的概率．Jc法是目前一种主 要的计算可靠度的方法，它适用于随机变量为任意分布下结构可靠指标的求解．介绍了结构可靠度计算的Jc法的 具体方法、迭代计算过程及其在土坡稳定性计算中的应用．建立了土坡稳定性可靠度分析的基本模型，并附以工程 实例，用Excel进行迭代计算，验证了结构可靠度Jc法在土坡稳定性分析中的可靠性及高精度．

关键词: 土坡稳定, JC法, 可靠指标JB, 可靠度, 失效概率