倾斜荷载下的地基边坡极限承载力分析  

Analysis of ultimate bearing capacity of slope under tilting load

作　　者：吴建平 WU Jianping(Yingtan Municipal Water Conservancy and Electric Power Investigation and Design Institute,Yingtan 335001,China)

机构地区：[1]江西省鹰潭市水利电力勘测设计院,江西鹰潭335001

出　　处：《江西水利科技》2018年第4期235-239,共5页Jiangxi Hydraulic Science & Technology

摘　　要：为了研究倾斜荷载作用下地基边坡的极限承载力,本文采用有限元数值模拟及理论计算相结合,建立合理的有限元模型并计算相应模型在倾斜荷载作用下地基边坡的极限承载力.结果表明:地基边坡在失稳破坏前,等量增加倾斜荷载,其安全系数减小幅度随着地基边坡角度的增加逐渐变缓;通过有限元数值模拟以及理论计算公式都可以得到倾斜荷载下地基边坡的极限承载力大小,并且两者的误差较小,鉴于计算简易程度可得,利用有限元数值计算地基边坡的极限承载力更加简单;地基边坡在倾斜荷载作用下,随着边坡角度的增加,其极限承载力逐渐减小,并且坡角越大减小幅度越大.In order to study the ultimate bearing capacity of slope under inclined load,this paper combines the finite element numerical simulation and theoretical calculation to establish a reasonable finite element model and calculate the ultimate bearing capacity of the corresponding slope under inclined load. The results show that before the failure of instability,the inclined slope of foundation slope increases in equal amount,and the decrease of safety factor will gradually decrease with the increase of slope angle of foundation slope. Through the finite element numerical simulation and theoretical calculation formula under the inclined load,the ultimate bearing capacity of foundation slope is small,and the error between the two is small. In view of the simplicity of calculation,the ultimate bearing capacity of foundation slope calculated by finite element numerical method is more simple. Under the action of inclined load,with the increase of slope angle,the ultimate bearing capacity decreases gradually,and the larger the slope angle is,the larger the decreasing range is.

关 键 词：地基边坡 倾斜荷载 数值计算 安全系数 极限承载力 

分 类 号：P642[天文地球—工程地质学] U459[天文地球—地质矿产勘探]