加筋高填方边坡变形过程及稳定性离散元分析  

Discrete element analysis of deformation process and stability of high-fill reinforced slopes

作　　者：章涵 黄城友 车德龙 易成龙 刘钟钒 ZHANG Han;HUANG Chengyou;CHE Delong;YI Chenglong;LIU Zhongfan(Hubei Key Laboratory of Disaster Prevention and Mitigation,China Three Gorges University,Yichang 443002,China;College of Civil Engineering and Architecture,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《四川建筑科学研究》2025年第2期51-59,共9页Sichuan Building Science

基　　金：国家自然科学基金资助项目(42207218)。

摘　　要：随着中国西南地区电力设施的建设,大量采用土工格网加筋方式加固的高填方边坡得到应用,其变形破坏过程及稳定性的研究可为相关工程提供设计依据。采用离散元数值模拟方法,依据赣州市一变电站填方边坡构建了加筋土边坡离散元模型,研究了不同加筋间隔下加筋土边坡的变形特征及稳定性。研究结果表明:土工格网加筋能有效减小边坡的变形,且对边坡上部坡表的变形控制效果更好;加筋土边坡内裂纹受岩土体中筋材的阻挡不能连续扩展,而是在每个加筋层内扩展相连形成贯穿坡体的滑动面;加筋土边坡1/2坡高处的坡表水平位移量最大,随着加筋间隔的减小,边坡最大水平位移与发生变形破坏的范围减小,边坡稳定性增强,加筋间隔为1.0 m时边坡处于基本稳定状态,加筋间隔为0.5 m时边坡达到稳定状态。With the construction of power facilities in Southwest China,a large number of high-fill slopes reinforced by geogrid reinforcement have been formed.The study of the deformation and failure process and the stabilities can provide the design basis for the related projects.The discrete element numerical simulation method was used to establish the models of reinforced slopes based on the filling slope located in Ganzhou City,and the deformation characteristics and stabilities of reinforced slopes under different reinforcement intervals were investigated.The research results show that geogrid reinforcement can significantly reduce the deformation of the slopes,and has a better control effect on the deformation of the upper surface of the slope.The cracks in the reinforced slope cannot grow in succession due to the barrier of the reinforcement in the slope,however,they expand and connect in each reinforced layer to form a penetrating sliding surface.The horizontal displacement of the slope surface at 1/2 height of the reinforced slope is the largest.As the reinforcement interval decreases,the maximum horizontal deformation of the slope and the scale of deformation failure reduce,while the stability of the slope increases.When the reinforcement interval is 10 m,the slope is basically stable,and it is stable when the reinforcement interval is 05 m.

关 键 词：加筋土边坡 离散元 加筋间隔 变形特征 边坡稳定性 

分 类 号：U418.52[交通运输工程—道路与铁道工程]