顺层岩质边坡变形机制分析与治理效果模拟

Analysis of the bedding rock slope deformation mechanism and management simulation

以北京双大路顺层边坡为例,通过对现场工程地质条件的系统调查和变形监测,在对边坡的变形特征进行研究的基础上通过离散元(UDEC)数值模拟,结合工程地质条件分析,探讨了边坡变形破坏机制。监测结果表明,边坡处于顺层滑移弯曲的最后阶段,边坡表层岩体沿层面发生滑移弯曲变形,在层状岩体弯曲产生的推力作用下产生变形破坏,并形成贯通的剪切滑面,在剥蚀或开挖作用下边坡产生整体失稳;边坡在支护状态下的坡体状态的数值模拟及治理后的坡体监测成果分析表明,通过挡土墙、锚索支护后,边坡达到了稳定性要求。

Taking the bedding slope of the Shuangda road in Beijing for example,this paper makes a systematic investigation and the deformation monitoring of the engineering geological conditions,the deformation characteristics of the slope.On this basis,by discrete element（UDEC） numerical simulation and by analysing the engineering geological conditions,this paper discusses the deformation characteristics.The result of monitoring shows that when the slope is in the later section of slip curve,the rocks on the top and surface of the deformation shape will appear slippage crack deformation along the surface,and the fragmentation rocks nearby the first-class slope bring large deformation under the thrust of bending of stratified rock,and form the shear sliding surface.After sliding surface in the bending rocks connect the shear sliding surface in fragmentation rocks,the slope appear overall instability.The state of slope under supporting is simulated by discrete element（UDEC）,and the treated slope is analyzed by means of monitoring,by using retaining walls and anchor supports,the slope reach the stability requirements.