中文摘要：

以江西万载至宜春高速公路某膨胀土路堑3级高边坡为研究对象,利用有限差分方法对锚杆框架梁支护结构与坡体共同作用下的边坡稳定性进行了三维数值计算,分析了不同坡级锚杆参数对路堑高边坡变形和安全系数的影响规律。结果表明,边坡安全系数并不是随锚杆长度的增加而持续增加,而是存在一峰值,锚杆布设角度对边坡安全系数影响较小,而对边坡变形有显著影响,不同坡率的各级边坡存在最优锚固角。

英文摘要：

Taking the three-level expansive soil roadcut slope of Wanzai-Yichun Freeway in Jiangxi Province as the research object,we use the finite difference method to carry the three-dimensional numerical calculation of slope stability under the action of anchor frame beam supporting structure and the slope.The anchor parameters of the different level slope influence on the safety factor and deformation of high roadcut slope are analyzed.The results show that the slope safety factor does not increase with the increase of anchor length,and it has a peak; that the influence of anchor setting angle of the slope on the safety factor is small,but it has significant effect on the slope deformation.The optimal anchor angle is different,as the rate of the three levels slope is different.