期刊
MATHEMATICAL PROBLEMS IN ENGINEERING
卷 2021, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2021/6622522
关键词
-
资金
- Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection [SKLGP2020K022]
- Fundamental Research Funds for the Central Universities, CHD [300102289720, 300102280108, 00102411401]
This study provides a theoretical formulation of safety factor for infinite unsaturated soil slopes under different profiles of matric suction, illustrating the significant impact of intermediate principal stress on the stability of slopes. The comparisons with other methods show the proposed formulation's validity. The results offer insights for optimizing designs and disaster prevention of unsaturated soil slopes.
Profiles of matric suction are critical for assessing the stability of unsaturated soil slopes, and the strength of unsaturated soils is affected by the intermediate principal stress. This study presents a theoretical formulation of safety factor for infinite unsaturated soil slopes under four different profiles of matric suction using the limit equilibrium method. The unified shear strength equation under plane strain conditions is adopted to capture the effect of intermediate principal stress on the strength of unsaturated soils. The proposed formulation of safety factor is found to have good comparability and broad applicability. The validity of the proposed formulation is demonstrated by comparing its predictions with the results of the extended shear strength method and the finite element method available in the literature. Parametric studies show that the effect of intermediate principal stress on the stability of unsaturated soil slopes is significant; the difference of safety factor among four suction profiles is pronounced, and the safety factor is highest for a linear suction profile. In addition, the safety factor changes with the infiltration depth in two stages, decreases with the slope angle, and increases with effective strength parameters. The results of this study are capable of providing beneficial guidance for optimization designs and disaster preventions of unsaturated soil slopes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据