基于有限元强度折减法的锚喷网支护多台阶岩质边坡的研究  

Study of the Anchor-plate Retaining Multi-level Rock Slope Based on Strength Reduction FEM

作　　者：尹冠生[1] 赵庭[1] 高艳[1] 

机构地区：[1]长安大学理学院,陕西西安710064

出　　处：《公路工程》2015年第4期47-50,66,共5页Highway Engineering

基　　金：交通运输部西部交通建设科技项目(2009 318 812 063);陕西省交通科技项目(09-10K)

摘　　要：结合工程实例,采用有限元强度折减法,以计算结果不收敛作为边坡失稳的评判依据,求解边坡的安全系数,评价预应力锚喷网支护多台阶岩质边坡的稳定性,并分别对有、无加锚支护的边坡的稳定性和锚杆的受力进行了分析。结果说明锚杆能有效的约束边坡变形和塑性应变的发展,提高了边坡的稳定性。根据最危险滑裂面与锚杆的位置可以得出,在实际施工时坡顶处锚杆的长度可以适当的较坡脚和坡腰处短一些,在保证稳定性的前提下节约材料,为工程中进行预应力锚喷网支护边坡的设计提供了参考。Based on engineering practice,strength reduction FEM（ finite element method） is used. The safety factor is solved where the misconverge of results is taken as the basis for evaluation of slope instability. The stability of the slope was analyzed with and without anchor-plate retaining and for the former situation anchor forces were achieved. It is concluded that adding the anchors improved the slope stability,where the anchor can effectively limit the development of slope deformation and plastic strain. According to the most dangerous sliding surface and the position of the anchor,conclusions could be drawn that in the actual construction,the length of the bolt at the top of the slope could be taken shorter than that at the bottom and in the middle of the slope,which would save materials in ensuring the stability of the slope. The results will provide valuable support for the design of prestressed anchore-plate retaining slope in the engineering.

关 键 词：边坡 有限元强度折减法 锚喷网支护 安全系数 数值模拟 

分 类 号：U416.14[交通运输工程—道路与铁道工程]