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- Title
不同降雨强度下多台阶黄土边坡稳定性可靠度分析.
- Authors
刘 恒
- Abstract
To investigate the influence of rainfall intensity on the reliability of the stability of loess slopes, a typical multi-stage loess slope was selected to analyze the stability of slope under different rainfall intensities based on the finite element software. After considering the uncertainty of slope soil strength parameters, the slope failure probability was calculated using the Monte Carlo method. The influence of the variability and correlation of loess strength parameters on the failure probability was also discussed. The results show that the stability coefficient of multi-stage loess slopes decreases approximately linearly with the increase of rainfall duration at the rainfall stage, and slightly recovers at the infiltration stage. The influence of rainfall intensity on slope stability is relatively small. Omission of the randomness of the strength parameters of the slope soil will overestimate the factor of safety. Compared to the cohesion of loess, the probability of slope failure appears more sensitive to the variability of the internal friction angle of loess, and shows a nonlinear and rapid increase with the increase of the coefficient of variation of the internal friction angle. In addition, the failure probability of the slope also decreases approximately linearly with the increase of the correlation coefficient of the strength parameters of the main body of the slope soil. Therefore, more emphases should be placed onto the influence of the variability and correlation of the soil strength parameters of the main body of the slope, when analyzing the reliability of slope stability.
- Subjects
RAINFALL reliability; MONTE Carlo method; SLOPES (Soil mechanics); SLOPE stability; RAINFALL; INTERNAL friction
- Publication
Journal of Beijing University of Civil Engineering & Architecture, 2024, Vol 40, Issue 4, p73
- ISSN
2096-9872
- Publication type
Article
- DOI
10.19740/j.2096-9872.2024.04.09