地震作用下碎石土边坡的稳定性研究

Analysis of gravel slope stability under earthquake action

为研究地震对碎石土边坡稳定性的影响机制,建立了楼房山隧道罐子沟端滑坡防治工程的数值计算模型,采用拟静力法,分析了不同地震水平加速度条件下边坡应力场、位移场、塑性区及剪应变增量的变化规律。研究结果表明,地震作用下,碎石土边坡的稳定性随着地震水平加速度的增加呈先缓慢减小后急剧减小的特征;边坡在地震作用下的破坏以受压破坏为主。

In order to research the influence mechanism of gravel soil slope stability under earthquake action,the three-dimensional numerical model of Loufangshan gravel landslide prevention and control engineering was established by the pseudo-static method,the change rule of the stress field,displacement field,plasticity zone and shear strain increment of the slope under different level of earthquake acceleration was analyzed. The research results show that： firstly,the gravel soil slope stability is slowly reduced with the increase of earthquake acceleration,and then sharply reduced; secondly,the damage of slope under earthquake action takes the compression damage as the primary thing.