水泥混凝土路面的温度梯度日极值预估  

Estimation of Diurnal Extreme of Cement Concrete Pavement Temperature Gradient

作　　者：林云青 谈至明[2] 

机构地区：[1]深圳市城市交通规划设计研究中心有限公司,广东深圳518000 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《公路交通科技》2015年第1期41-44,共4页Journal of Highway and Transportation Research and Development

摘　　要：温度梯度的大小受外界环境如气温、辐射、风雨等因素的影响较为显著,基于大同、宁波、广州三个气象观测站近一年的气象、路面温度等数据的采集分析,引入前一日的太阳辐射数据(Q-1)作为预估模型的参数,提高了前人基于气象参数对水泥混凝土路面日温度梯度最大值的预估模型的精度;采用路面表层温度这一较容易获取的温度数据(包括路表日最高温度Ts,max与路表日最低温度Ts,min)对标准厚度路面的日最大温度梯度进行预估的模型;引进路面温度梯度日振幅ΔTg这一概念,提出路面日温度梯度最小值与日温度梯度最大值之间的指数关系。Temperature gradient of pavement is significantly affected by external environmental factors such as temperature, radiation, wind, rain and so on. Based on the meteorological and road pavement, temperature data collected from 3 meteorological stations in Datong, Ningbo, Guangzhou over the past year, one new parameter which is solar radiation the day before （ Q_ 1 ） is introduced into the prediction model to improve the accuracy of previous prediction model of diurnal maximum temperature gradient of cement concrete pavement based on meteorological parameters. And pavement surface temperatures （including the pavement surface daily highest temperature Ts, max and the road surface daily lowest temperature Ts, rain ） , the temperature data which can be easily obtained, are used in the model to estimate diurnal maximum temperature gradient of the standard thickness concrete pavement. The concept of diurnal range of temperature gradient （△Tg） is introduced, and the exponential relation between pavement diurnal minimum temperature gradient and maximum temperature gradient is put forward.

关 键 词：道路工程 预估模型 气象参数 温度梯度 日极值 水泥混凝土路面. 

分 类 号：U416.216.03[交通运输工程—道路与铁道工程]