降雨作用下非饱和土质边坡稳定性分析  

Analysis of Unsaturated Soil Slope Stability under the Condition of Rainfall

作　　者：郭志元[1] 何昌荣[1] 俞小卉[1] 杨皓然[1] 

机构地区：[1]四川大学水利水电学院,成都610065

出　　处：《高速铁路技术》2012年第1期20-23,共4页High Speed Railway Technology

摘　　要：非饱和土质边坡的基质吸力使土体具有较高的抗剪强度,遇雨时吸力减小或丧失而致土体强度降低,引发边坡失稳。鉴于边坡稳定在各类基础建设中的重要作用,结合工程算例,分析了吸力随降雨历时变化的规律、边坡安全系数与降雨强度的关系、不同坡度边坡降雨前后稳定性变化的规律,为增进边坡的抗滑维稳具有积极意义。Most soil slopes in engineering are unsaturated. Since there existed absorption, the soil has high shear strength. However, when it rains, the water infiltrate into the soil and the absorption is reduced, this may lead to the decrease of soil shear strength and slope stability. According to importance of slope stability in various foundation constmction and based on engineering practices, this paper analyses the roles of absorption change during rainfall, relationship between rainfall intensity and slope stability as well as regularity of slope stability change with different slope gradient before and after rainfall. It also has positive significance in improving the ability of anti-landslide and maintaining stability of slope.

关 键 词：非饱和土 降雨 边坡稳定 基质吸力 

分 类 号：P642.2[天文地球—工程地质学]