某均质岩层边坡预应力锚索加固稳定性分析  

Stability Analysis on Reinforcement of Prestressed AnchorCable of a Homogeneous Rock Slope

作　　者：牟丹 Mou Dan(Shanxi Traffic Planning Survey and Design Institute Co.,Ltd.,Taiyuan 030032,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,太原市030032

出　　处：《北方交通》2021年第7期55-58,62,共5页Northern Communications

摘　　要：为了弄清楚预应力锚索对于边坡的加固作用,利用有限元分析软件FLAC3D建模,分析了边坡在施加预应力锚索后的变化规律,得出以下结论:预应力锚索在约束x方向上的位移较为明显,z方向的沉降次之,限制边坡潜在滑动面的位移;预应力锚索可以改变坡面上的主应力和剪切应力方向,达到提高滑面抗滑力的效果;预应力锚索可以提高滑动面的抗剪切强度,达到减小剪切应变增量的效果;预应力锚索可以优化坡面塑性区的分布,消除潜在滑动面的存在,使坡体处于稳定状态。In order to make clear the reinforcement effect of prestressed anchor cable on the slope,the change law of the slope after the application of prestressed anchor cable is analyzed by utilizing the finite element analysis software FLAC3D to realize modeling.The following conclusions are drawn:the displacement of prestressed anchor cable in the constraint X direction is more obvious,followed by the settlement in the Z direction,which limits the displacement of potential sliding surface of the slope;the prestressed anchor cable can change the direction of the principal stress and shear stress on the slope surface and improve the anti-sliding force of the sliding surface;the prestressed anchor cable can improve the shear strength of the sliding surface and reduce the effect of the increment of shear strain;the prestressed anchor cable can optimize the distribution of plastic zone of the slope surface,eliminate the existence of potential sliding surface,and make the slope in a stable state.

关 键 词：均质岩层边坡 预应力锚索 有限元 加固稳定性分析 

分 类 号：U416.1[交通运输工程—道路与铁道工程]