多因素耦合条件下的边坡稳定性分析

Slope stability analysis under multi-factor coupling conditions

为了研究多因素耦合条件下的边坡稳定性变化规律,基于极限平衡理论和瑞典条分法,给出了水压力的分布规律和计算方法,分析了地震力作用时的边坡力学结构并推导出稳定系数的修正公式。采用理论分析和数值模拟相结合的方法对芒来露天矿边坡稳定性进行研究,结果表明:水和震动耦合条件下边坡稳定系数随震动荷载的增大和水位的升高呈二次线性下降;芒来露天矿边坡危险区域集中在底部的高陡台阶,该位置是控制边坡稳定性的关键,在边坡结构优化调整时,重点考虑该区域的应力应变情况。

The distribution of water pressure and calculation methods are presented and the mechanical structure of the slope under the earthquake force is analyzed for deriving the modified formula for stability coefficients to study the changes of slope stability under the conditions of multi-factor coupling based on the limit equilibrium theory and the Swedish slice method . The research conducted on Manglai Open Pit slope stability by a combi- nation of the method of theoretical analysis and numerical simulation showed that the water and coupling coefficients of slope stability under the conditions of vibration are on the quadratic linear decrease with the increase of vibration load and higher water level. The slope dangerous area in Manglai Open Pit concentrates in the high-steep stair at the bottom , a key position to control the stability of slope. In the optimization and adjustment of the slope structure, consideration should focus on the stress and strain of the region.