沥青路面温度场的主动调控方法研究

Study on the active control method of asphalt pavement temperature field

为了实现路面温度场的主动调控并得以应用,对沥青路面三层混合料的导热系数和比热容对路面温度场的影响分别进行了数值模拟分析。结果表明,为了缓解城市热岛效应,应主要增大上面层的导热系数和比热容;为了减少车辙发生,应增大上面层导热系数,减小中下面层导热系数,或者增大三层材料的比热容。此外,由于沥青混合料的导热系数对路面温度场的影响更大,调节路面温度场时应首先考虑采取措施改变混合料的导热系数。

In order to realize the active control and application of pavement temperature field,effects of thermal conductivity and specific heat capacity of the three layers on pavement temperature field were simulated and analyzed,respectively.The results show that the thermal conductivity and specific heat capacity of the top layer have priorities to be increased in order to mitigate the urban heat island effect.To reduce the rutting,the thermal conductivity of the top layer should be increased and the thermal conductivity of the middle layer should be reduced,or the specific heat capacity of the three layers should be increased together.In addition,the thermal conductivity should be first considered to alter when the pavement temperature field is to be adjusted,because the thermal conductivity has greater influence on the temperature field.