考虑土体非均匀性的边坡失稳风险定量评估
Quantitative assessment of slope instability risk considering soil heterogeneity
丁亚楠 1崔金鹏 1郭鸿俊 1李坚 2李勤军1
作者信息
- 1. 长江设计集团有限公司,湖北武汉 430071;长江设计集团有限公司流域水安全保障湖北省重点实验室,湖北武汉 430071
- 2. 云南省滇中引水工程有限公司,云南 昆明 650051
- 折叠
摘要
基于蒙特卡洛模拟和随机场方法,反演了土体非均匀性条件下边坡不同的失效模式,提出了一种考虑土体非均匀性的边坡失稳风险定量评估方法.与均质边坡相比,考虑土体非均匀性条件下的滑动面积、临界滑裂面与安全系数均具有不确定性,土体非均匀性对边坡破坏模式和稳定性有显著的影响.通过计算二维边坡的滑动面积,提出了考虑多重失效模式的滑坡风险评估指标,为定量评估滑坡风险和减轻滑坡灾害提供一定的技术依据.
Abstract
Based on Monte Carlo simulation and random field methods,inversion of different failure modes of slope under soil non-uniformity conditions is carried out,and a quantitative risk evaluation method for slope failure considering soil non-uniformity is proposed in the study.Compared with the uniform soil slope,the landslide area,critical slip surface and factor of safety of the soil non-homogeneous slope are all uncertain,thus,the soil non-uniformity has a significant effect on the failure mode and stability of slope.By calculating the sliding area of a two-dimensional slope,a landslide risk assessment index considering multiple failure modes is proposed,which can provide a certain technical basis for quantitatively evaluating the landslide risk and mitigating landslide disasters.
关键词
边坡稳定性/土体非均匀性/随机场/滑动面积/风险评估Key words
slope stability/soil heterogeneity/random field/landslide area/risk assessment引用本文复制引用
出版年
2024
NETL
NSTL
万方数据