台阶式土工格栅加筋土挡墙结构优化设计

为了研究不同条件下土工格栅加筋土挡墙的性能,通过模型试验和现场试验,主要考虑了2种土工格栅类型和3种土工格栅间距,根据实际工程不同的计算工况,建立三维模型,运用有限元理论和方法进行数值模拟计算分析.比较数值计算和模型试验,分析了土工格栅网孔和间距对加筋土挡墙的变形、地基应力分布情况的影响,提出在实际工程中,台阶式土工格栅加筋土挡墙结构优化设计要综合考虑各种因素,合理选择土工格栅和加筋层间距,以获得较高的加筋效果和工程经济效益.

Optimization design of stepped geogrid-reinforced soil retaining wall

In order to investigate the behavior of a geogrid-reinforced soil retaining wall in different conditions,a model test and field test considering two types of geogrid and three geogrid spacings were conducted.At the same time,according to different calculated conditions,three-dimensional finite element models were established.The numerical results were compared with the test data,and the influences of geogrid mesh and spacing on the deformation and foundation stress distribution were analyzed.The results show that the optimal design of a stepped geogrid-reinforced soil retaining wall should comprehensively consider various factors and reasonably select geogrid mesh and spacing for better reinforcement effect and economic benefits.