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将土工格栅作为加筋材料铺设于黄土路堤中能够有效改善路堤的变形特性,提高路堤的稳定性。通过一系列土工试验,研究了山平高速公路黄土路堤填料的基本物理力学性质;建立数值分析模型,对比分析了交通荷载作用下黄土路堤在未加筋和加筋两种工况下的变形特性;研究了筋材布设方式对黄土加筋路堤的影响,并进行了参数分析。结果表明:土工格栅能够有效减小黄土路堤顶面沉降、不均匀沉降和侧向位移;当格栅铺设层数相同时,等间距铺设的效果要好于非等间距铺设;荷载大小、填土参数、筋材参数对加筋路堤工作性状影响较大;筋土界面似摩擦系数对边坡稳定性影响较大。
The geogrid laying as reinforcement material in loess embankment can effectively improve the deformation characteristics of embankment and improve the stability of embankment. Through a series of geotechnical tests, the basic physical and mechanical properties of loess embankment fillings of Shanyang Expressway were studied. The numerical analysis model was established to analyze the deformation characteristics of loess embankment under unstirred and stiffened conditions under traffic load. The effect of reinforcement layout on the embankment reinforced by loess is studied, and the parameter analysis is carried out. The results show that the geogrid can effectively reduce the settlement, uneven settlement and lateral displacement of the top of loess embankment. When the number of layers is the same, the effect of equal distance laying is better than that of non-equally spaced laying. The load size, The parameter and reinforcement parameters have a great influence on the working behavior of the reinforced embankment. The friction coefficient at the interface between the reinforcement and the soil has a great influence on the stability of the slope.