【作者】 石福周；

【导师】 王选仓；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2014， 博士

【摘要】 沙漠地区高温季节地表最高温度可达70℃以上，在高温环境和车辆荷载共同作用下沥青路面极易产生车辙病害。低温季节，沙漠地区最低气温可达-30℃以下，且降温速率较快，沥青面层和半刚性基层在温度梯度作用下容易发生收缩开裂，进而引起路面结构的破坏。甘肃部分沙漠处于山区，公路存在长大纵坡路段，由于特殊的温度、荷载应力工作状态，该路段车辙与裂缝病害更加严重。针对沙漠地区长大纵坡沥青路面温度、应力工作状态提出合理的路面设计方法是解决沙漠地区长大纵坡沥青路面病害的根本途径。本文以甘肃沙漠地区长大纵坡沥青路面工程为依托对长大纵坡沥青路面稳定性控制进行研究。根据甘肃地区气象资料及沥青路面温度场数值仿真模型分析结果，对沙漠地区气温年变化趋势及高温天气、常温天气、低温天气条件下沥青路面特征温度进行了预估，为分析沥青路面温度应力奠定基础。以甘肃地区沙漠公路路面结构为基础，分析荷载温度共同作用下路面结构剪应力分布特性及路面永久变形分布特性，为提出沙漠地区长大纵坡沥青混合料质量控制指标提供依据。针对长大纵坡路段车辙病害形成原因，采用混合料抗剪性能试验对沥青混合料性能影响因素进行系统分析，确定了长大纵坡沥青混合料技术性能控制指标，提出了沙漠地区长大纵坡沥青混合料优化设计方法。针对甘肃沙漠地区低温环境特点，采用有限元模型分析了不同温缩系数时路面结构层温度应力分布规律，并针对不同的层间粘结情况分析长大纵坡沥青路面层间剪应力工作状态，以此为基础提出了基于抗裂效应的橡胶沥青粘结层技术性能指标，并对橡胶沥青粘结层性能进行了评价。更多还原

【Abstract】 Desert has dry climate, great evaporation and large temperature changes. Summer is hot,the maximum surface temperature at about70℃, asphalt softened in the vehicle load prone torutting; winter is cold, the lowest surface temperature can reach-30℃or less, asphalt pavementembrittlement, cracking greatly reduced, easy cause pavement cracking. Part of the desert in themountains of Gansu, road presence grew longitudinal sections, due to the special temperature,load stress working conditions, ruts and cracks in the road more severe disease. For desert regiongrew longitudinal asphalt pavement temperature, stress working condition reasonable pavementdesign method is to solve the desert grew longitudinal asphalt pavement fundamental way. In thispaper, grew up in the desert regions of Gansu asphalt pavement works longitudinal study based onlongitudinal grow key technology of asphalt pavement.According to meteorological data Gansu and asphalt pavement temperature field numericalsimulation model analysis results, the temperature trends in desert areas and hot weather,temperature weather, asphalt pavement characteristics under low temperature weather conditionswere forecast for the analysis of temperature stress laid asphalt pavement foundation.In Gansu desert highway pavement structure is based on the analysis of shear stressdistribution characteristics and the distribution characteristics of the road pavement permanentdeformation under load temperature coupling effect, provide the basis for the proposed desertregion grew longitudinal asphalt quality control indicators.Longitudinal sections for grown rut causes disease, the use of performance tests on shearmix asphalt mixture performance factors affecting system analysis to determine the longitudinalgrowing up control of asphalt technical performance indicators, grew up in desert areas proposedvertical slope optimization design method of asphalt mixture, asphalt longitudinal grew designedto provide a reference desert areas.According to the characteristics of low-temperature environment in Gansu desert areas,using the finite element model of temperature stress distribution pavement layer shrinkagecoefficient at different temperatures and for different layers bond grew between the longitudinalanalysis of asphalt pavement layer shear stress working conditions, as the basis for proposed basedrubber asphalt stress absorbing layer cracking effect technical performance indicators and rubberasphalt stress absorbing layer performance were evaluated.更多还原