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首先计算路表温度不同时路面结构的温度场,然后根据温度场的分布规律计算路面每一结构层在温度场下材料的回弹模量值,进而对沥青混凝土路面进行力学计算。根据计算结果分析在温度和荷载耦合作用下大粒径沥青碎石下面层厚度不同时路面各结构层的力学行为,并结合路面层厚度与最大公称粒径之间关系的要求,推荐合理的大粒径沥青碎石下面层厚度。
Firstly, the temperature field of the pavement structure with different road surface temperatures is calculated. Then, according to the distribution law of the temperature field, the springback modulus of each structural layer in the temperature field is calculated, and then the mechanical calculation of asphalt pavement is carried out. According to the calculation results, the mechanical behaviors of the pavement layers under the different thickness of the large-size asphalt pavements under the coupling of temperature and load are analyzed. Based on the requirements of the relationship between the pavement layer thickness and the maximum nominal particle size, a reasonable and large Particle size below the asphalt pavement thickness.