加筋软土路基动力特性的影响因素研究  

Study on Factors Influencing Dynamic Characteristics of Reinforced Soft Subgrade

作　　者：李献民[1,2] 梁艳慧 

机构地区：[1]河南省交通科学技术研究院有限公司,郑州450052 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《路基工程》2014年第4期17-21,27,共6页Subgrade Engineering

基　　金：河南省省院科技合作项目(102106000040);河南省交通运输厅科技计划项目(2010P225)

摘　　要：基于土工格栅与软土地基的作用机理,建立了加筋软土接触面变形特性的模拟计算模型;借助有限元数值仿真计算方法分析研究了荷载形式、加筋层数、筋材位置、移动荷载等诸多因素对加筋软土路基力学性能、变形特性的影响。数值模拟计算结果表明:荷载作用形式对加筋软土路基表面位移的影响并不显著;然而即使在移动荷载作用下加筋层数、筋材位置依然能够显著改善软土路基的动力及变形特性。Based on the action mechanism between geogrid and soft soil subgrade, the model that is for simulating calculation in relation to deformation characteristics of the contact surface thereof has been established. Through FEM numerical simulation, the effects of many factors, such as load form, geogrid layers and locations, and moving load, on the mechanical properties and deformation characteristics of the reinforced soft subgrade were analyzed. The results show that the effect of load form on the surface displacement of the subgrade is not significant; however, even under the action of moving load, the geogrid layers and location may affect the dynamic and deformation characteristics of the subgrade greatly.

关 键 词：加筋软土路基 动力特性 变形特性 影响因素 有限元分析 

分 类 号：TU447[建筑科学—岩土工程]