摘要
文中基于京港澳高速公路湖北段,在几乎不承受车辆荷载的路肩带钻取路面芯样进行试验分析,研究路面沥青面层老化后动态模量的变化规律,并分析了老化后沥青路面结构响应的变化情况.结果表明:(1)随着老化时间的增加,沥青路面动态模量不断增大;(2)路面上面层动态模量>中面层动态模量>下面层动态模量,随路面深度方向呈下降趋势,且上面层动态模量远大于中、下面层;(3)老化造成的沥青面层动态模量增大使路面路表应力增大,路面在长期老化后更易产生表面裂缝.
Based on the Hubei section of Beijing-Hong Kong-Macao Expressway, the core samples of pavement were drilled in the shoulder straps which hardly bear the vehicle load for experimental analysis, and the change law of dynamic modulus of asphalt pavement after aging was studied, and the change of structural response of asphalt pavement after aging was analyzed. The results show that:(1)With the increase of aging time, the dynamic modulus of asphalt pavement increases continuously.(2)The dynamic modulus of the upper layer>the middlelayer>the lower layer decreases with the depth of the pavement, and the dynamic modulus of the upper layer is much larger than that of the middle and lower layers.(3)The increase of dynamic modulus of asphalt pavement caused by aging increases the stress of pavement surface, and the pavement is more prone to surface cracks after long-term aging.
作者
袁春丽
王锦腾
束裕
汪彪
罗蓉
于晓贺
YUAN Chunli;WANG Jinteng;SHU Yu;WANG Biao;LUO Rong;YU Xiaohe(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Hubei Highway Engineering Research Center,Wuhan 430063,China;Huadong Engineering Corporation Limited,Hangzhou 311100,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2023年第1期169-174,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
湖北省科学技术厅基金项目(2020BCA085)。
关键词
沥青面层
动态模量
老化
道路路肩
路面现场芯样
asphalt surface course
dynamic modulus
aging
road shoulder
pavement site core sample
