In this paper,displacement variation law of various structure of reinforced retaining wall under vehicle dynamic load is studied by using finite element analysis software of MidasGTS NX,combining with the engineering example of the flexible reinforced double stage retaining wall and using dynamic analysis method,through the analysis of the dynamic displacement of models under reinforced retaining wall and unreinforced retaining wall in different time and different position,the following conclusions are drawn: the effects of the geogrid on reinforced retaining wall and unreinforced retaining wall are quite different,not only can geogrid significantly strengthen soil constraints,but also effectively reduce the horizontal displacement and vertical displacement of various layers of pavement structure.%采用MidasGTS NX有限元分析软件,结合柔性加筋双级挡墙的工程实例,使用动力分析方法,对车辆动载下加筋挡墙各个结构物的位移变化规律进行研究,通过对加筋挡墙与不加筋挡墙情况下模型不同时刻、不同部位动位移的分析,得出以下结论:车辆动载下,土工格栅对加筋挡墙和不加筋挡墙的差异性影响显著,土工格栅不仅能明显加大土体的约束,而且还能有效的减小路面结构各层的水平位移和竖向位移.
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