中国地质调查2025，Vol.12Issue(5)：109-120,12.DOI:10.19388/j.zgdzdc.2024.312
降雨条件下差异性弃土边坡渗流及稳定性分析
Seepage and stability anlaysis of different abandoned soil slopes under rainfall conditions
摘要
Abstract
The soil mass in the abandoned soil site has complex gradation and low strength,and landslides and debris flows are highly likely to occur under extreme rainfall conditions.To deeply analyze the influence of rainfall and different fill materials on the stability of the abandoned soil site,the authors conducted a systematic study on the permeability and mechanical properties of the abandoned soil site under different soil-rock ratios through a large number of indoor and outdoor experiments.The experimental results show that as the soil-rock ratio increa-ses,the permeability coefficient of the soil decreases according to a negative exponential function curve.And the failure deviatoric stress first increases and then decreases,reaching its peak when the soil-rock ratio is 6∶4.The numerical simulation analysis of seepage and stability of the slope under different rainfall conditions was carried out,based on the soil parameters obtained from the experiments.The results show that the saturation of the slope increases with the increasing of rainfall duration.And the pore pressure would increase,and the matric suction would decrease.So the safety factor of the slope decreases with the decreasing of shear strength.The research proves that the soil-rock ratio has a significant impact on the seepage and stability of the slope.During slope construction,the filling positions of different soil-rock ratio fill materials should be reasonably planned to im-prove the stability of the abandoned soil site.The research could provide references for the design of the aban-doned soil site,the construction of the abandoned soil filling,and the rational utilization of different fill materials.关键词
差异填料/渗流/边坡稳定性/数值模拟Key words
differential filling/seepage/slope stability/numerical simulation分类
天文与地球科学引用本文复制引用
陈登峰,白恒承,汪磊,李修磊,何兆益..降雨条件下差异性弃土边坡渗流及稳定性分析[J].中国地质调查,2025,12(5):109-120,12.基金项目
科技部重点研发计划项目"道路基础设施智能感知机理及数据解析方法(编号:2018YFB1600200)"与广西壮族自治区交通科技示范应用项目"超大型弃土场安全稳定与生态环保关键技术研究(编号:BSGS-ZGB-KJ-2023-05)"联合资助. （编号:2018YFB1600200）
