低路堤动力响应影响因素模型试验研究  

Model Test Study on Influencing Factors of Dynamic Response of Low Embankment

作　　者：王婧[1] 刘大鹏[1] WANG Jing;LIU Da-peng(Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China)

机构地区：[1]江苏建筑职业技术学院,徐州市221116

出　　处：《公路》2019年第2期13-17,共5页Highway

基　　金：西部交通建设科技项目资助;项目编号2011318797600;江苏省住建厅科技项目;项目编号2017ZD085;江苏省住建厅科技项目;项目编号2016ZD81

摘　　要：为合理设计和建造低路堤,延长低路堤的使用寿命,首先需要明确各因素对低路堤动力响应的影响规律。文中通过足尺模型试验研究了地基含水率、路基填料、动荷载作用频率和峰值对低路堤动应力和动应变的影响。研究结果表明,同一深度处的动应力随着地基含水率的增加而减小,路基范围内的动应变随着地基含水率的增加而减小,地基范围内的动应变随着地基含水率的增加而增加;路基强度越高,传递到地基的动应力越小,地基范围内的动应变也越小;动荷载作用频率在1Hz～5Hz时,动应力和动应变均随着荷载作用频率的增加而减小;动应力、动应变与动荷载峰值近似成线性关系。In order to design and build low embankment rationally and extend the service life of low embankment,the influence law of various factors on low embankment response should be determined firstly.Through full-scale model test,the influence of soil water content,subgrade filling,dynamic load frequency and peak value on dynamic stress and dynamic strain of low embankment are studied in the paper.The results show that:the dynamic stress at the same depth decreases with the increase of the water content of the foundation,the dynamic strain in the roadbed decreases and the dynamic strain in the foundation increases with the increase of the water content of the foundation;the higher the roadbed strength,the smaller the dynamic stress transferred to the foundation and the smaller the dynamic strain in the foundation;the dynamic stress and dynamic strain decrease with the increase of the dynamic load frequency between 1 Hz and 5 Hz;and the relationship between dynamic stress,dynamic strain and peak load is approximately linear.

关 键 词：低路堤 模型试验 动应力 动应变 影响因素 

分 类 号：U416.1[交通运输工程—道路与铁道工程]