坡顶车辆荷载作用下顺向泥岩边坡破坏机理分析  

Analysis on Failure Mechanism of Consequent Mudstone Slope under Vehicle Load on Top of Slope

作　　者：杨瑞娟 吁燃[1] 苏晓亮 段晓冉 陈涛 YANG Ruijuan;YU Ran;SU Xiaoliang;DUAN Xiaoran;CHEN Tao(Guizhou Transportation Planning Survey and Design Institute Co.,Ltd.,Guiyang 550081,China;Changjiang Geotechnical Engineering Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳550081 [2]长江岩土工程有限公司,武汉430010

出　　处：《路基工程》2024年第5期158-162,共5页Subgrade Engineering

摘　　要：基于贵州某高速公路顺向泥岩边坡,将坡顶车辆荷载考虑为均布静载,采用离散元UDEC软件,研究坡顶荷载大小及作用位置对顺向泥岩边坡变形破坏机理的影响。结果表明:边坡上部岩体先沿层面产生顺层滑移,边坡破坏模式为推移式滑坡;随着坡顶车辆荷载的增加,边坡的稳定性系数不断降低,最大位移不断增大,但边坡潜在滑面位置及变形失稳范围基本不变;随着坡顶荷载距坡肩的距离增大,边坡的稳定系数不断增大,最大位移量不断减小,但潜在滑面后缘不断后移,潜在失稳范围增大。Based on the consequent mudstone slope of a highway in Guizhou Province,the vehicle load on the top of the slope is considered as the uniform static load.The influence of load size and position on deformation and failure mechanism of consequent mudstone slope is studied by using UDEC software.The results show that:the rock mass in the upper part of the slope first bedding slips along the plane,and the failure mode of the slope is trust load landslide.With the increase of vehicle load on the top of the slope,the stability coefficient of the slope continues to decrease and the maximum displacement continues to increase,but the position of the potential sliding surface and the deformation and instability range of the slope are basically unchanged.With the increase of the distance between the slope top load and the slope shoulder,the stability coefficient of the slope continues to increase and the maximum displacement decreases,but the rear edge of the potential sliding surface continues to move back and the potential instability range increases.

关 键 词：泥岩边坡 坡顶荷载 离散元 稳定性系数 破坏机理 变形控制 

分 类 号：TU457[建筑科学—岩土工程]