EFFECT OF UNSATURATED SEEPAGE ON SLOPE STABILITY UNDER RAINFALL

被引：1
|
作者：
Cao, Ling [1 ,2 ]
Wang, Yejiao [2 ]
Xu, Yongfu [2 ,3 ]
Tan, Yunzhi [1 ]
机构：
[1] China Three Gorges Univ, Coll Civil Engn & Architecture, Yichang 443002, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Civil Engn, Shanghai 200240, Peoples R China
[3] Hohai Univ, Geotech Engn Ctr, Wentian Coll, Maanshan 243000, Peoples R China
来源：
Special Topics & Reviews in Porous Media-An International Journal | 2016年 / 7卷 / 02期
关键词：
unsaturated seepage; slope stability; rainfall; infiltration; fractal;
D O I：
10.1615/SpecialTopicsRevPorousMedia.2016016999
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A fractal model can forecast the hydrological characteristics of unsaturated soil. This study investigates the process of one-dimensional unsaturated soil seepage, combined with analysis of pore airflow. According to the fractal approach to unsaturated shear strength, a new formulation was derived to define the critical depth for slope failure under rainfall. The factors, the fractal dimension, and air-entry value were determined to control the stability of unsaturated soil slopes under rainfall. The saturated coefficient of hydraulic conductivity and rainfall intensity has a greater effect on the instability of unsaturated soil slopes. For the case where the rainfall intensity is much larger than the saturated coefficient of hydraulic conductivity, the pore-air pressure in the infiltration process affects the soil suction pattern.
引用
收藏
页码：131 / 139
页数：9
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