中文摘要：

研究在三个峡水库区域是普遍的碎片山崩的失败机制具有意义。在三座峡水库基于发展法律和碎片山崩的失败模式的统计分析，进步失败的模式被发现。为有二的山崩滑动的碎片的进步失败的机械模型乐队们被适用也建立片方法。根据在邻近的片之间的 downslide 力量的结果，如果更低的片的 downslide 力量比零大，片沿着主要滑动表面失败，否则它是稳定的。在结果，失败范围被获得。压力功能能通过失败片的维的分析被决定。根据片的静态的边界条件，强调在片的任何点的状态能被获得。然后强调任何点的状态在第二等也滑动乐队罐头被建立。失败第二等滑倒乐队根据 Mohr 库仑被判定失败标准。因此，一个机械方法被建议与二分析碎片山崩的进步失败滑动乐队。

英文摘要：

It is of significance to research failure mechanism of debris landslides that are widespread in the Three Gorges Reservoir Area. Based on the statistical analysis of the developmental law and failure mode of debris landslides in the Three Gorges Reservoir, the mode of progressive failure is found. The mechanical model for progressive failure of debris landslides with two slip bands is also established by applying slice method. According to the results of the downslide force between adjacent slices, if the downslide force of lower slice is larger than zero, the slice fails along the major sliding surface, otherwise it is stable. In result, the failure range is obtained. The stress function can be determined through dimensional analysis of failure slice. According to static boundary conditions of the slice, stress state of any point in the slice can be obtained. Then stress state of any point in the secondary slip band can also be established. The failure of the secondary slip band is judged on the basis of Mohr-Coulomb failure criterion. Therefore, a mechanical method is proposed to analyze the progressive failure of debris landslide with two slip bands.