水位下降对沿河路基边坡稳定性的影响分析

Effect Analysis of Water Level Drop on Stability of Subgrade Slope along River

基于ABAQUS流固耦合理论,采用有限元法数值求解水位下降过程中坡体内的动态浸润线,研究水位下降过程中路基边坡稳定性的变化。结果表明:随着水位的下降,路基的稳定安全系数先减小后增大,即下降过程中存在危险水位,且水位降速越快、路基填料渗透性越差、危险水位越低,动水压力对路基边坡稳定性的影响越大。

Based on the fluid-structure interaction theory of ABAQUS, the numerical solution of dynamic saturation line inside slope in the course of water level drop was solved by finite element method to study how the stability safety factor of subgrade slope changes in this period. The result shows that, as the water level drops, the increases first then decreases, that is to say, there is dangerous water level existing in the drop process of water level, and the faster the level drops, the worse the permeability of subgrade fill has, and the lower the dangerous level, the larger the effect of hydrodynamic pressure on the stability of subgrade slope.