摘要
使用SWMS_2D模拟了降雨入渗条件下边坡含水量分布的变化过程,并将非饱和土体强度理论应用到强度折减法中,利用基于FLAC^(2D)的强度折减法对边坡稳定性进行了分析计算。以某公路边坡为例,模拟了不同时刻降雨入渗条件下的含水量分布,采用基于FLAC^(2D)的强度折减法进行计算,结果显示:降雨过程中边坡内土体含水量上升,非饱和土基质吸力减小,孔隙水压力值上升,边坡稳定安全系数明显降低,降雨结束1 500 min(25 h)后边坡安全系数达最小为1.09。
The process of water distribution in slope is researched with the SWMS_2D model. The strength reduction of FLAC^2D, which is based on unsaturated soil shear strength theory, is used to analysis slope stability. An example of a slope of road is simulated. The results showed that for a given rainfall, the soil moisture content and the pore water pressure increase with the decrease in the suction pressure of the unsaturated soils. The results also showed that the slope safety factor decrease. In the simulation carried out, the safety factor dropped to the minimum of 1.09 in 25 hours after rainfall.
出处
《建筑技术开发》
2009年第8期34-36,共3页
Building Technology Development
