基于有限元的边坡长期稳定性分析

考虑到边坡岩土体的流变特性，提出采用弹粘塑性本构模型结合基于有限元应力场的边坡稳定性分析方法，着重研究了边坡的稳定性随时间或变形发展的变化规律。将边坡稳定性与应力重分布、位移的发展联系起来，实现了边坡的动态稳定性分析过程，这对于实现边坡信息化施工和边坡的稳定性控制具有重要的意义。同时研究了粘性参数对边坡长期稳定安全系数影响的敏感性，分析结果表明，粘性系数的取值对边坡稳定后的长期安全系数影响很小，但对于边坡稳定所需要的时间影响较大。

FEM-Based Analysis of Slope Long- Term Stability

Considering the rock and soil rheological property of slope, it is proposed to use the elasto-visco-plastic constitutive model in combination with the slope stability analysis based on FEM stress field to study mainly the law of the slope stability change with time or deformation development. The correlation of the slope stability with the stress redistribution and displacement has realized a dynamic stability analysis of slope, which will be of great importance to the realization of informationized construction and stability control of slope. Meanwhile, the sensitivity of the effect of viscosity on the safety coefficient of long term slope stability is also studied. The results indicate that the value taking of the viscosity coefficient will have little effect on the long term safety coefficient after the slope is stabilized, but will have great effect on the time needed for the slope to become stable.