公路隧道内路面温度场分析  

Analysis of Temperature Field of Asphalt Pavement Inside Highway Tunnel

作　　者：史小丽[1] 王选仓[1] 

机构地区：[1]长安大学公路学院,西安710064

出　　处：《武汉理工大学学报》2009年第20期50-54,共5页Journal of Wuhan University of Technology

基　　金：河北省交通科技项目(Y-060249)

摘　　要：为确定公路隧道内路面结构温度变化规律,提供隧道路面工作环境温度指标,利用有限元方法分别对隧道空气温度分布及层状路面结构温度场进行预估。结果表明,公路隧道内路面温度场分析中仅需考虑空气对流换热和空气辐射换热2种路表与外界热交换的形式,计算结果与实测值的平均误差为1.7℃,并表现出明显的规律性:短隧道内随着深度增加,路面结构温度、温度梯度、变温速率都会出现变化幅度减小、变化相位滞后的现象,但其变化量明显比隧道外变化量小;长隧道内路面结构温度梯度和变温速率1 d中无明显变化。分析结果能够为隧道内路面结构设计和材料选择提供理论依据和指导作用。In order to define pavement temperature field distribution inside highway tunnels and offers temperature index of pavement working environment, the finite element method （FEM） is developed to calculate the temperature field of air and pavement in highway tunnel. Only two kinds of heat conduction between the pavement and its surroundings are considered, ineluding air heat flow and the radiation between air and pavement. The developed FEM simulation model can predict temperature distributions at different times of various pavement layers accurately with an average absolute error of 1.7 ℃. The result shows obvious regularities：as the position deepens, the range of the temperature, therma/gradient and temperature changing velocity will decrease and the phases will be deferred in short tunnel, but the quantity is smaller than that of outside the tunnel. There are no obvious changes in thermal gradient and temperature changing velocity of long tunnels pavement. The results offer theoretical basis for asphalt concrete pavement design and materials selection in tunnels.

关 键 词：隧道路面 沥青混凝土路面 温度场 有限元法 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]