节理边坡渗流离散元模拟及边坡可靠性分析

采用定性研究和定量分析相结合的方法,对地下水对节理边坡稳定性的影响进行了较为全面的研究.首先采用离散元方法进行了节理边坡地下水流动的数值模拟:其次用不确定性方法——模糊点估计方法对有水和无水作用两种情况下的边坡稳定性进行了模糊随机可靠性对比分析.研究表明,地下水的存在使边坡的破坏面积增大,破坏概率剧增,边坡可靠性指标极大地降低,因此地下水对节理边坡稳定性具有不可忽视的作用.

Numerical Simulation of Water Flow in a Joint Slope by the Dispersed Element Method and Reliability Analysis of the Slope

The influence of underground water on the stability of joint slopes was studied completely by the synthetic method of qualitative and quantitative analyses. First, a numerical simulation of underground water flowing in a slope was made by the dispersed element method. Then, an uncertain method-fuzzy point estimation was used to analyse the reliability of the slope under the conditions of water ignored and considered, respectively. The results showed that the failure area extended, the failure probability increased greatly, and the reliability index decreased greatly when water was considered. It is concluded that water has unignored effect on slope stability.