湿热地区水泥混凝土路面温度场与温度应力研究

Characteristics of concrete pavement temperature field and temperature stress in hot and humid areas

为揭示南方湿热地区水泥混凝土路面的温度场与温度应力特征,以福建省南平市、福州市两种水泥混凝土路面结构为研究实体,对5个不利季节现场温度场进行监测试验研究,并基于数据进行了水泥混凝土路面温度场特征分析,建立了路面温度场预估公式,并分析了不同工况的水泥混凝土路面温度应力和措施.研究发现:在南方高温和太阳辐射的综合作用下,水泥混凝土路面夏季将经受较为显著的炎热温度场和显著温度应力作用,在月际增温、降温突出的4月和11月,水泥混凝土路面将产生较大的温度梯度和应力.随着外界环境气象因素的周期变化,水泥混凝土路面温度梯度存在多种典型分布形状.因此,建议南方湿热地区适当采用尺度较小的路面板块划分,选择合理的路面铺筑施工时段和面板与基层的接触界面.

In order to reveal the characteristics of concrete pavement temperature field and temperature stress in the south area which is damp and hot,this article studies the temperature field tests in 5 disadvantageous seasons,considering of two different structures of cement concrete pavement in Nanping and Fuzhou in Fujian province.Based on the data achieved it analyzed the characteristics of concrete pavement temperature field and temperature stress.It established the pavement temperature field estimate formula,and analyzed temperature stress under different working conditions,and gave the proper measures.It found that the cement concrete pavement was affected observably by temperature field in summer,and the temperature gradient in 4 month and 11month is larger than the other months.Along with the periodic change of external environment factors,cement concrete pavement temperature gradient existed many different kinds of typical distribution.It suggested that in humid and hot areas,slab scale should be smaller,reasonable pavement construction time and interface between the pavement and the basement should be chosen.