华北水利水电大学学报（自然科学版）2024，Vol.45Issue(6)：81-88,8.DOI:10.19760/j.ncwu.zk.2024069
基于双折减系数法与极限平衡法的顺层滑坡稳定性分析
Stability Analysis of Bedding Landslides Based on Double Reduction Coefficient Method and Limit Equilibrium Method
摘要
Abstract
Taking the Fengjiaping landslide in Longtan Township,Butuo County,Sichuan Province as an example,a land-slide stability analysis program based on the double reduction coefficient method was designed using FLAC3D software.The coupling technique of GIS-Rhino-FLAC3D is applied to establish a 3D geological body model.Considering the different at-tenuation rates and degrees of cohesion and internal friction angle during landslide instability,as well as the influence of matric suction on soil shear strength in unsaturated soils,a double reduced coefficient method is proposed to define the comprehensive safety factor with the attenuation weights of cohesion force and friction force.The stability of bedding land-slides was studied and analyzed using the limit equilibrium method for comparative calculations.The results are as follows.The designed shear strength parameter double reduction program can generate a safety factor cloud map,which intuitively reflects the spatial distribution characteristics of landslide safety factors.Compared with the traditional strength reduction method,the proposed double reduction coefficient method is more accurate in calculating the distribution range of sliding surface and comprehensive safety factor.Compared with the limit equilibrium method,the error is smaller and it can accu-rately reflect the stable state of landslide.The research results can provide reference for the application of the double reduc-tion coefficient method in the prevention and control of landslide disasters.关键词
顺层滑坡/极限平衡法/双折减系数法/GIS-Rhino-FLAC3D/稳定性分析Key words
bedding landslide/limit equilibrium method/double reduction coefficient method/GIS-Rhino-FLAC3D/sta-bility analysis分类
建筑与水利引用本文复制引用
李小根,盛济铭,王静,刘泓辰,毛新宇..基于双折减系数法与极限平衡法的顺层滑坡稳定性分析[J].华北水利水电大学学报（自然科学版）,2024,45(6):81-88,8.基金项目
国家自然科学基金项目(42077449,U1704124) （42077449,U1704124）
华北水利水电大学研究生教育改革与质量提升工程项目(NCWU-JPJC202302). （NCWU-JPJC202302）
