Analysis of Slope Stability with Imprecise Soil Properties Using Uncertain Sets

There are many uncertainties with respect to the assessment of slope stability, and those associated with soil properties should be given particular attention. The uncertainty theory provides an alternative to treat these uncertainties using parochial cognitive sources. A novel methodology is propos...

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Bibliographic Details
Published in:Mathematical problems in engineering 2019-01, Vol.2019 (2019), p.1-9
Main Authors: Tang, Yi, Liu, Zhibing, Li, Jie, Zhou, Xuejun
Format: Article
Language:English
Subjects:
Civil engineering
Decision making
Expected values
Fuzzy sets
Parameter uncertainty
Random variables
Safety factors
Set theory
Shear strength
Slope stability
Soil investigations
Soil properties
Soil stability
Stability analysis
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Summary:There are many uncertainties with respect to the assessment of slope stability, and those associated with soil properties should be given particular attention. The uncertainty theory provides an alternative to treat these uncertainties using parochial cognitive sources. A novel methodology is proposed to evaluate the stability of slopes based on an uncertain set. The soil properties involved in the deterministic methods, i.e., shear strength parameters and unit weight, are expressed as uncertain sets, and their membership functions can be assumed to be triangular or trapezoidal for a homogeneous or two-layered slope, respectively. The parameter values of membership functions are designed according to the means and variations of the soil properties, and then the expected safety factor can be calculated through the operational laws. Two numerical examples including a homogeneous slope and a two-layered slope illustrate the suitability of the proposed methodology. The relationship between the variation in the safety factor and the changes in the soil properties is investigated; moreover, the determination of the parameter values of membership is also discussed.
ISSN:1024-123X
1563-5147
DOI:10.1155/2019/1062347