降雨对黄土边坡渗流及稳定性影响分析

Analysis on Influence of Rainfall on Seepage and Stability of Loess Slope

结合兰海高速公路渭武段边坡工点实例,针对降雨对边坡的影响,对其机理及过程进行了分析。首先对边坡的渗流场进行数值分析,模拟得出边坡孔隙水压力分布,再运用极限平衡算法,在抗剪强度中引入孔隙水压力因素,进而求得边坡瞬时安全系数,提供了一种定量评估降雨对边坡安全影响的方法。

Taking the construction site in the Weiwu Section of Lanzhou-Haikou Highway as an example, the mechanism and process of rainfall impact on slope were studied so that the seepage field of slope may be analyzed numerically and the distribution of pore water pressure at the slope simulated; then by means of limit equilibrium algorithm with pore water pressure factor introduced into shear strength, the instantaneous safety factor of slope could be solved. Therefore, a method for quantitative evaluation of rainfall impact on slope safety was provided.