变温条件下组合式基层沥青路面结构温度场研究  

Research on Temperature Field of Combined Subgrade Asphalt Pavement under Variable Temperature Conditions

作　　者：郭芳[1] 顾维 Guo Fang;Gu Wei(Hunan Vocational and Technical College of Transportation,Changsha 410132;Hunan Provincial Transportation Science Research Institute Co.,Ltd.,Changsha 410015)

机构地区：[1]湖南交通职业技术学院,湖南长沙410132 [2]湖南省交通科学研究院有限公司,湖南长沙410015

出　　处：《中阿科技论坛（中英文）》2023年第11期100-104,共5页China-Arab States Science and Technology Forum

基　　金：2020年湖南省教育厅科学研究优秀青年项目“湿热环境下组合式基层沥青路面温度场和车辙预估模型研究”(20B205)。

摘　　要：由于沥青混合料是典型的温度敏感性材料,沥青路面结构温度场会直接影响路面的耐久性和适用性。文章通过ABAQUS有限元软件对组合式基层沥青路面温度场进行仿真模拟,计算各结构层的温度梯度,并在典型路段埋设温度传感器进行实测,分析对比实测值与计算值的差异。结果表明:组合式基层路面结构温度场呈周期性的变化规律,温度峰值出现的时间随深度增加逐渐延后;设级配碎石的组合式基层能有效改善半刚性基层的温度状况,降低反射裂缝的产生概率;增加ATB厚度能有效减小沥青面层温度梯度,从而改善结构温度环境;温度场实测值与计算值具有良好的一致性,可满足后续车辙和疲劳计算的需求。Since asphalt mixture is a typical temperature-sensitive material,the temperature field of asphalt pavements will directly affects the durability and applicability of the pavement.To this end,the article simulates the temperature field of combined subgrade asphalt pavement through ABAQUS finite element software,calculates the temperature gradient of each structural layer,and embeds temperature sensors in typical road sections for measurement,and finally analyzes and compares the differences between the measured and calculated values.The results suggest that the temperature field of the combined subgrade pavement exhibits a periodic variation pattern,and the time of the temperature peak appears gradually delays with the increase of depth;The combination of grading and crushed stone can effectively improve the temperature condition of semi-rigid subgrade and reduce the probability of reflection cracks;The increase of the ATB thickness can effectively reduce the temperature gradient of the asphalt surface,thereby improving the structural temperature environment;The measured and calculated values of the temperature field are consistent,which can meet the needs of subsequent rutting and fatigue calc ulations.

关 键 词：沥青路面 组合式基层 温度场 ABAQUS软件 

分 类 号：U416[交通运输工程—道路与铁道工程]