仲恺农业工程学院学报2026，Vol.39Issue(2)：43-52,10.DOI:10.3969/j.issn.1674-5663.2026.02.006
基于降雨-坡顶荷载相互作用的土-岩混合边坡稳定性分析
Stability analysis of soil-rock mixture slopes based on rainfall-slope top loading interaction
摘要
Abstract
To reveal the instability mechanisms of Soil-Rock Mixture(SRM)slopes under coupled rainfall and slope top loading,a SRM seepage stress coupling model was established based on a road cutting project in Hunan Province,and a dynamic porosity permeability coefficient iterative algorithm was implemented in Midas GTS NX.Using the shear-strength reduction method,single-loading,single-rainfall,and combined scenarios were simulated to track the spatiotemporal evolution of pore-water pressure(PWP),shear stress/strain,and the factor of safety(Fs).Results showed that crest loading caused shear concentration at the bench-toe-platform junction,reducing Fs from 4.431 to 1.414;continuous rainfall lead to PWP build-up along the clay-mudstone interface,dropping Fs 2.275 within 3 h;under combined conditions the two effects were nonlinearly amplified and decreased to 0.947 at 24 h,with a throughgoing plastic band.It is concluded that drainage and reinforcement should be prioritized at the slope shoulder and the second-bench toe-platform junction.An early-warning reference is suggested as Fs≤1.05-1.30 accompanied by a sustained increase in displacement at critical locations.These findings provide quantitative guidance for load management and disaster-mitigation design of SRM slopes in rainfall-prone regions.关键词
土-岩混合边坡/边坡稳定性/有限元分析/渗流-应力耦合模型Key words
Soil-Rock Mixture slope/slope stability/finite-element method/coupled flow-stress model分类
交通工程引用本文复制引用
封旭,刘用奇,吕文彤,徐凤,于磊..基于降雨-坡顶荷载相互作用的土-岩混合边坡稳定性分析[J].仲恺农业工程学院学报,2026,39(2):43-52,10.基金项目
湖南省教育厅科学研究优秀青年项目(24B1001)、广东省住房和城乡建设厅科技创新计划项目(2023-K49-103119)、广东岭南乡村绿色建筑产业化工程技术研究中心项目(2023GLTG002)、广东省普通高校特色创新项目(2024KTSCX206)、仲恺农业工程学院质量工程项目(ZG2024031)、仲恺农业工程学院高等教育教学改革项目(JG2024033)、广东省大学生创新创业训练计划项目(S202511347100)、仲恺农业工程学院大学生创新创业训练计划项目(202511347132、202511347281). （24B1001）
