孔隙水压力作用下的分层边坡稳定性上限分析

Research of Upper Limit Solution to Supporting Forces for Tunnel Face under Pore Water Pressure

针对传统边坡稳定性分析时将边坡土层视为均匀土层分析的局限性及边坡土体的稳定性由内摩擦角φ及忽视粘聚力c0决定,而忽视诸如地震力及孔隙水压力等外部因素影响的问题,在传统边坡稳定性分析的基础上,将边坡划分为三个部分两个不同的土层,同时考虑孔隙水压力对边坡稳定性的影响,采用极限分析上限定理,计算各外力功率及速度间断线上的内能耗散功率,并通过约束条件运用MATLAB优化计算出边坡的临界高度.

In the traditional analysis of the slope stability, the slopes were regarded as even, which has its short- comings and the stability of slopes are considered to be determined by the internal friction angle φ and the cohe- sive force c0, which ignores some other external factors such as seismic load and pore water pressure. Based on the traditional analysis of slopes, this paper divides the slope into three layers and studied the stability by upper bound theorem in limit analysis. The critical height of slope is calculated and optimized by MATLAB.