长大纵坡路段沥青路面动力响应试验  

Test on dynamic response of asphalt pavement at large longitudinal slope section

作　　者：董忠红[1] 吕彭民[1] 刘学[1] 

机构地区：[1]长安大学道路施工与装备教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2013年第4期7-11,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(51008030);中央高校基本科研业务费专项资金项目(CHD2010JC063;CHD2011ZD001;CHD2011JC100)

摘　　要：为深入研究实际交通荷载下长大纵坡路段路面结构的动态力学行为,开发了三维动应变传感器。选择青岛—兰州高速公路陕西段工程段作为试验路,施工中在5个断面的沥青面层底部布置了开发的传感器,采用典型重型运输车辆作为加载装置,检测不同坡道位置沥青路面的动力响应,分析了坡道位置和轴重对路面动力响应的影响。研究结果表明:随着坡长的增加和轴重的增大,面层底部的垂向、横向和纵向动应变增加;面层底部垂向压应变受坡长和轴重的影响严重,而面层底部纵向和横向应变主要受坡长影响;目前国际上提出的长寿命路面设计控制指标,不适合于半刚性基层路面结构。To study the dynamic mechanical behavior of asphalt pavement at sections of large lon-gitudinal slope under actual traffic load, a three-dimensional dynamic strain sensor was devel-oped. The sensors were buried at the bottom of the asphalt layer of 5 selected sections during of Qingdao-Lanzhou expressway during the construction. Using typical heavy transport vehicles as loading devices, the asphalt pavement dynamic responses of different slope locations were detec- ted. The influences of slope location and axle load on the dynamic response were analyzed. The results show that the vertical strain, the lateral strain and the longitudinal strain at the bottom of the asphalt layer are all increased with the increase of slope length and axle load. The vehicle strain is greatly affected by the slope length and axle load, and the lateral strain and the longitu- dinal strain are more affected by the slope length. The international long-life pavement design control targets are not suitable for semi-rigid base pavement structure. 8 figs, 10 refs.

关 键 词：道路工程 长大纵坡 动力响应 三维传感器 

分 类 号：U416.217[交通运输工程—道路与铁道工程]