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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.259 SNIP: 0.466 CiteScore™: 0.83

ISSN 印刷: 2151-4798
ISSN オンライン: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.2016016999
pages 131-139

EFFECT OF UNSATURATED SEEPAGE ON SLOPE STABILITY UNDER RAINFALL

Ling Cao
College of Civil Engineering and Architecture, China Three Gorges University, Yichang 443002, China; Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yejiao Wang
Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yongfu Xu
Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Geotechnical Engineering Center, Wentian College of Hohai University, Maanshan 243000, China
Yunzhi Tan
College of Civil Engineering and Architecture, China Three Gorges University, Yichang 443002, China

要約

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.


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