中文摘要：

以宜-巴高速公路某加筋土路堤断面为研究对象,结合现场监测数据,采用弹塑性有限元计算程序对加筋土-锚杆组合支护结构的变形受力特性进行研究,并针对筋材刚度、加筋间距、坡后锚杆连接与否等因素进行参数分析。主要研究结果表明：加筋土路堤中相邻阶梯水平位移变化幅度较大,且坡后台阶处出现较大不均匀沉降,需保证此处填土的压实度;加筋土路堤最大水平位移和垂直位移随着筋材轴向刚度的增加而减小;随着加筋间距的增加,加筋土路堤的安全系数相应减小,各加筋体承担的荷载不断增大;锚杆与加筋体连接情况下最大水平位移和垂直位移均较未连接的情况要小,安全系数提高。

英文摘要：

Taking a cross-section of reinforced embankment of Yichang - Badong expressway as the research object, combing with on-site monitoring data, the stress and deformation characteristics of the reinforced soil- anchor supporting structure are studied using an elastic-plastic finite element program, and the parametric analysis on the reinforcement stiffness, reinforcement spacing, bolt connection conditions at backslope, etc. is carried out. The main resuk shows that （ 1 ） there is an obvious change in horizontal displacement between adjacent embankment steps, and larger differential settlement is found around the backslope step where the degree of fill compaction should be guaranteed; （2） the maximum horizontal and vertical displacements decrease of the reinforcement with the increase of axial stiffness of reinforcement; （3） the safety factor decreases with the increase of reinforcement spacing, and the geogrid will bear larger load; （4） when anchors are connected with geogrids, the maximum horizontal and vertical displacements become small and the safety factor increases accordingly.