水位变动对库区非饱和路堑边坡稳定性的影响分析

选取三峡库区某处非饱和路堑边坡为研究对象，结合非饱和土流-固耦合理论，在不同水力路径条件下，计算得到坡体在整个调水周期阶段内的渗流场发展情况以及相应的边坡稳定性发展规律。研究结果表明:相同速率条件下，水位的变动类型（上升或下降）对坡体渗流场乃至稳定性所造成的影响也有所不同。水位陡升、缓慢上升以及水位骤降的作用阶段里，相应的边坡稳定性会持续降低，而水位缓慢下降的作用阶段里，受此影响的坡体稳定性会呈现出先降低后逐渐增加的规律。

Analysis on Effect of Water Level Fluctuation on Stability of Unsaturated Cutting Slope in Reservoir Area

Taking an unsaturated cutting slope in the Three Gorges Reservoir area as the study object, and depending on the theory of fluid-soil coupling for unsaturated soil, both the development situation of seepage field within the slope during the overall water transfer period in different hydraulic paths, and the corresponding development laws of the slope stability, were calculated. The study results show that under the same velocity, the type of water level fluctuation (rise or fall) makes different effects on the seepage field in slope, even the slope stability. During the acting periods of sudden or slow rise, and rapid fall of water level, the stability of slope affected will keep decreasing; while during the slow fall of water level, the stability will present a law of first decreasing and then increasing gradually.