摘要
降雨是诱发滑坡发生或复活的主要原因。但通常在进行非饱和土边坡的稳定性分析时,只考虑不同降雨边界条件下的边坡稳定性分析。在前人分析的基础上,分别考虑了降雨条件下,有无裂隙和裂隙的深度等对边坡的渗流场及稳定性的影响,并对计算结果进行对比。结果表明:当降雨强度较小且在地表无积水时,对结果的影响很小;当降雨强度较大时,在地表形成的积水流入裂缝时,安全系数随着裂缝深度的增加逐渐减小。
Rainfall is the main factor inducing landslide or its reactivation; however, generally, only slope stability analysis carried out under different rainfall boundary conditions is considered in stability analysis for unsaturated soil slope. Based on the previous analysis, this paper analyzed both the seepage field and stability of slope when considering, under rainfall conditions, fissures, no fissures and fissure depth, respectively; and then compared the calculated results. The study results show that, when rainfall intensity is light and no water is accumulated on the ground surface, the impact on the result is minor; when rainfall intensity is heavy and water is accumulated on the ground surface and flows into the fissures, the safety factor decreases gradually as the fissure depth increases.
出处
《路基工程》
2014年第4期133-136,共4页
Subgrade Engineering
关键词
降雨
滑坡
裂隙
非饱和土
渗流场
稳定性
rainfall
landslide
fissures
unsaturated soil
seepage field
stability
