沥青路面温度场的热量分析研究

Analysis on Heat of Temperature Field of Asphalt Pavement

以高速公路沥青路面为依托工程,现场连续实测了各结构层的温度,分析了高温和低温温度场及其日周期变化规律。在此实测数据基础上,选取合适的材料热物性参数,针对冬季低温和夏季高温2种情况,计算分析了沥青路面的热量交换,以期进一步认识沥青路面的温度场。结果表明,沥青路面的温度场可以用结构层单位体积的热量变化来描述,二者的变化规律具有良好的对应性;路面热交换主要集中于沥青层,而在基层的变化较小;路面在冬季处于放热状态,在夏季处于吸收并储存热量状态。

Based on the project of expressway asphalt pavement, the temperatures of asphalt pavement structure layers are continuously measured in-situ, and the low and high temperature fields and its daily periodic variation regularity are analyzed. Based on these temperature data and by selecting the appropriate thermo-physic parameters of pavement materials, the heat exchange in asphalt pavement is calculated under the conditions of the low temperature in winter and the high temperature in summer, which will promote a better understanding of the temperature field of asphalt pavement. The result shows that （ 1 ） the temperature field of asphalt pavement can be described by the thermal variation per unit volume in each layer, the changing regularities under the 2 conditions have a good correspondence; （2） the heat exchange of asphalt pavement is concentrated in asphalt layer but it is less in pavement base; .（3） pavement is in exothermic state in winter and in endothermic state in summer.