摘要
在饱和-非饱和渗流理论基础上,从降雨强度、前期降雨总量、不同的土坡坡度以及是否考虑植被护坡等方面对大气降雨条件下土坡的稳定性进行了探讨。分析结果表明,在土体饱和渗透系数一定的条件下,强降雨对土坡稳定系数影响显著;土坡越陡,降雨强度大小对土坡安全性影响就俞显突出;土坡表层植物根系的存在影响非饱和区渗流场分布,可以延缓非饱和区含水量的增大,土坡稳定系数得到提高。
Slope stability is analyzed according to rainfall intensities, prophase total rainfall, different soil slope gradients and vegetation by saturated-unsaturated seepage theory. Study shows that great rainfall influences soil slope safety factor markedly, magnitude of rainfall intensity has a great influence on slope safety factor for steep slope under certain coefficient of saturated conductivity, the surface plant roots affect unsaturated zone seepage field distribution and postpone unsaturated zone moisture content＇s increase, so the soil slope safety factor is enhanced finally.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2006年第6期40-42,47,共4页
Hydrogeology & Engineering Geology
基金
科技部科研院所社会公益研究专项基金项目资助(2005DIB3J054)
关键词
降雨
入渗
非饱和土渗流
土坡
rainfall
seepage
unsaturated seepage
soil slope
