车辆荷载下土工格栅加筋挡土墙动力特性研究

摘要

Different degree of instability often occurs in the roadbed retaining walls. In view of this,com-bined with engineering examples and based on the finite element analysis method FLAC2D,research and analysis was made of the dynamic characteristics of geogrid reinforced retaining walls under vehicle loads. A preliminary study was made of the stress the geogrid bears under the symmetry of the vehicle and the horizontal displacement of retaining walls at different heights. Results show that the axial force the geogrid bears and the lateral displacement of the panel is closely related to their heights.%针对路基挡土墙在使用过程中普遍出现不同程度的失稳现象，结合工程实例，基于 FLAC2D 有限元数值分析方法对土工格栅加筋挡土墙在车辆荷载下的动力特性进行研究分析。通过对对称车辆荷载下土工格栅受力情况及不同高度挡墙墙面水平位移的初步研究，表明格栅所受的轴力大小和面板的侧向位移与其所处的高度有密切关系。