Rock-soil slope stability analysis by two-phase random media and finite elements
| Autor: | Kai Yao, Wei Hong, Huawen Xiao, Jun Hu, Yong Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Gaussian
lcsh:QE1-996.5 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Physics::Classical Physics Finite element method 0201 civil engineering Physics::Geophysics lcsh:Geology symbols.namesake Nonlinear system Factor of safety Slope stability probability classification symbols General Earth and Planetary Sciences Geotechnical engineering Material properties Slope stability analysis Geology 021101 geological & geomatics engineering Parametric statistics |
| Zdroj: | Geoscience Frontiers, Vol 9, Iss 6, Pp 1649-1655 (2018) |
| ISSN: | 1674-9871 |
| Popis: | To investigate the strong random nature of the geometric interfaces between soil and rock, a rock-soil slope is considered as a two-phase random medium. A nonlinear translation of a Gaussian field is utilized to simulate the two-phase random media, such that the soil (or rock) volume fraction and the inclination of the soil layer can be examined. The finite element method with random media incorporated as the material properties is used to determine the factor of safety of the rock-soil slope. Monte-Carlo simulations are used to estimate the statistical characteristics of the factor of safety. The failure mode of the rock-soil slope is examined by observing the maximum principal plastic strain at incipient slope failure. It is found that the critical surface of a rock-soil slope is fairly irregular, and it significantly differs from that of a pure soil slope. The factor of safety is sensitive to the soil volume faction, but it is predictable. The average factor of safety could be well predicted by the weighted harmonic average between the strength of soil and rock; the prediction model is practical and simple. Parametric studies on the inclination of the soil layer demonstrate that the most instable scenario occurs when the slope angle is consistent with the inclination of the soil layer. Keywords: Slopes stability, Numerical computation, Statistical analysis, Finite-element modelling, Random fields, Monte-Carlo simulations |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|