北京建筑大学学报2024，Vol.40Issue(4)：73-81,9.DOI:10.19740/j.2096-9872.2024.04.09
不同降雨强度下多台阶黄土边坡稳定性可靠度分析
Reliability Analysis of the Stability of a Multi-Stage loess Slope under Different Rainfall Intensities
摘要
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.关键词
黄土边坡/稳定性/可靠度/降雨/变异性Key words
loess slope/stability/reliability/rainfall/variability分类
建筑与水利引用本文复制引用
刘恒..不同降雨强度下多台阶黄土边坡稳定性可靠度分析[J].北京建筑大学学报,2024,40(4):73-81,9.基金项目
陕西省重点研发计划项目(2023-YBSF-587). （2023-YBSF-587）
