基于随机极限分析上限法的软土边坡可靠度研究  

Study on reliability of soft soil slope based on upper bound method of stochastic limit analysis

作　　者：韦志刚 WEI Zhigang(China Energy Engineering Group Guangxi Electric Power Design Institute Co.,Ltd.,Nanning Guangxi,530007,China)

机构地区：[1]中国能源建设集团广西电力设计研究院有限公司,广西南宁530007

出　　处：《江西水利科技》2025年第1期20-25,共6页Jiangxi Hydraulic Science & Technology

摘　　要：边坡稳定性是水利工程中的关键问题,其安全评估对于预防滑坡和保护人民生命财产安全至关重要。传统安全系数方法无法系统地考虑不确定性因素,所得到的安全系数为单一的数值,无法准确反映结构在不同荷载和环境下的真实安全状况。本研究考虑软土不排水抗剪强度的空间变异性,提出了一种软土边坡可靠度随机极限分析方法,同时考虑随机分布类型给边坡稳定性造成的影响,揭示不排水条件下软土边坡可靠度影响规律。结果表明:软土强度空间变异性会显著降低边坡安全性,采用空间变异参数对失稳边坡进行可靠度分析,合理的放坡方法可以保证其安全。Slope stability is a key issue in water conservancy projects,and its safety assessment is crucial to preventing landslides and protecting people's lives and properties.The traditional safety factor method cannot systematically consider uncertainty factors,and the obtained safety factor is a single value,which cannot accurately reflect the true safety status of the structure under different loads and environments.This study considers the spatial variability of the undrained shear strength of soft soil,proposes a stochastic limit analysis method for the reliability of soft soil slopes,and considers the impact of random distribution types on slope stability to reveal the soft soil under undrained conditions.Influence rules of soil slope reliability.The results show that the spatial variability of soft soil strength will significantly reduce the safety of the slope.The spatial variation parameters are used to conduct a reliability analysis of the unstable slope,and the grading method can ensure its safety.

关 键 词：可靠度 软土边坡 边坡稳定 

分 类 号：TD804[矿业工程—矿山开采]