季节性冰冻地区冬季路面温度分布规律

Temperature Distribution of Pavement in Seasonally Frozen Regions in Winter

为准确掌握冬季沥青路面温度场的分布特点和变化规律,基于自行研发的季节性冰冻地区典型道路模型试验台,以试验台近4年的路面温度跟踪观测数据为基础,开展了季节性冰冻地区冬季沥青路面温度场分布规律的研究。基于观测数据,运用统计分析法,建立了观测点所在区域路面温度场预估模型,并对实测值与预测值进行了对比。结果表明:在冬季,随着深度的增加,路面温度逐渐升高,温差变化逐渐减小,且在距路表30cm深度处存在日恒温点;气温骤变时,较大的温度梯度变化主要发生在沥青面层内;哈尔滨冬季最大冻结深度约为180cm;提出的预估模型具有较好的精确性与实用性。

Based on the field data collected from a self-developed experimental pavement system, temperature distribution of asphalt pavement in seasonally frozen regions in winter was studied. Based on the collected data, the prediction model for pavement temperature distribution in this area was proposed with regression analysis. The measured and predicted temperatures were compared. The results indicate that the temperature of pavement in winter rises gradually and change of temperature difference decreases gradually with the increase in depth, and there exist constant temperature points of days at the depth of 30 cm; when temperature changes suddenly, the greater temperature gradient changes occur at surface layer; the maximum freezing depth in winter of Harbin is about 180 cm. The presented model has good applicability and accuracy.