Stability of unsaturated soil slope considering stratigraphic uncertainty and rotated anisotropy of soil properties
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Published:2023-11
Issue:2
Volume:48
Page:359-376
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ISSN:0363-9061
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Container-title:International Journal for Numerical and Analytical Methods in Geomechanics
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language:en
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Short-container-title:Num Anal Meth Geomechanics
Author:
Cao Wei12ORCID,
Zhou Annan3ORCID,
Shen Shui‐Long4ORCID
Affiliation:
1. School of Transportation Science and Engineering Beihang University Beijing China
2. School of Architectural Engineering North China Institute of Science and Technology Langfang China
3. School of Engineering Royal Melbourne Institute of Technology Melbourne Australia
4. Department of Civil Engineering and Smart Cities, College of Engineering Shantou University Guangdong China
Abstract
AbstractThe stratigraphic uncertainty and rotated anisotropy of soil properties exist widely in nature. Recent studies have shown that the slope stability was significantly influenced by these two uncertainties. However, there is no proper method for simulating these two uncertainties at the same time, and the influence of the two uncertainties has not been considered in previous unsaturated soil slope stability analysis. This paper aims to propose a coupled method for characterizing the stratigraphic uncertainty and rotated anisotropy of soil properties, and investigate the unsaturated soil slope stability considering the two uncertainties. Through a slope case, the proposed method for characterizing the two uncertainties is examined. The effect of rotational angle on the slope stability and groundwater table is studied. In addition, four different uncertainty considerations are chosen to compare their influence on the slope stability and groundwater table. The results show that the proposed method can well characterize the two uncertainties at the same time. The rotational anisotropy of soil properties has a substantial impact on the slope stability and groundwater table. The rotational angles corresponding to the maximum and minimum reliability index of slope depend on the uncertainty considerations in the slope stability analysis. The slope reliability index only considering stratigraphic uncertainty is the highest, and the slope reliability index considering stratigraphic uncertainty and rotated anisotropy of soil properties is the lowest.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hebei Province
Fundamental Research Funds for the Central Universities
Subject
Mechanics of Materials,Geotechnical Engineering and Engineering Geology,General Materials Science,Computational Mechanics