车辆动载作用下双级柔性加筋挡墙应力分析  

Stress analysis for the flexible reinforced double stage retaining wall under the dynamic load of vehicle

作　　者：吴健 

机构地区：[1]湖南省娄衡高速公路建设开发有限公司,湖南衡阳421001

出　　处：《公路工程》2017年第3期164-169,共6页Highway Engineering

摘　　要：以娄衡高速公路双级柔性挡墙工程为背景,采用MidasGTS NX有限元分析软件,对车辆动载下加筋挡墙的应力变化规律进行研究。通过对模型不同时刻、不同部位应力在加筋与不加筋2种情况下的对比分析以及各层土工格栅应力的分析,得出以下结论:车辆动载下,土工格栅对不同时刻水平正应力的变化规律和路面各层的大主应力变化几乎没有影响,但是土工格栅能有效地减小路面各层的小主应力。另外,第一层土工格栅控制最大压应力,第五层土工格栅控制最大拉应力。According to the flexible reinforced double stage retaining wall of Lou Heng highway,the stress variation regulation of the reinforced retaining wall is studied by the finite element analysis software of Midas GTS under the dynamic vehicle load. Through the comparison analysis of different time and different part between the reinforced and non-reinforced retaining wall model,some important conclusions can be drawn as follows. The geogrid has not significant effect on the variation regulation of horizontal normal stress at different time and major principal stress of different layer of pavement. However,the minor principal stress of different layer of pavement can be effectively reduced by adding nine layer geogrid. In addition,the maximum compressive stress is controlled by the first layer geogrid,and the maximum tensile pressure is controlled by the fifth layer geogrid.

关 键 词：加筋挡墙 路面 土工格栅 车辆动载 MidasGTS-NX 应力分析 

分 类 号：U417.11[交通运输工程—道路与铁道工程]