流体加热融雪系统运行对道路结构温度分布特性影响分析  

Influence of Snow Melting System Operation on Temperature Distribution in Hydronic Heated Pavement Structures

作　　者：徐慧宁[1] 石浩 谭忆秋[1] 周纯秀[2] XU Huining;SHI Hao;TAN Yiqiu;ZHOU Chunxiu(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China;Transportation and Logistics Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,哈尔滨150090 [2]大连海事大学交通与物流工程学院,大连116026

出　　处：《北京工业大学学报》2024年第4期385-395,共11页Journal of Beijing University of Technology

基　　金：科技部重点研发计划资助项目(2022YFB2602600);国家自然科学基金资助项目(52278449)。

摘　　要：为了明确流体加热道路融雪系统运行对道路结构短期/长期温度分布特性的影响,利用室外足尺试验系统对比分析了普通水泥混凝土路面结构与流体加热道路融雪系统道路结构在温度、温变速率及温度梯度分布特性等方面的差异,阐明了系统运行对道路结构短期/长期温度分布特性的影响规律。结果表明:融雪系统运行初期,快速上升的流体温度对管壁-路面材料界面存在强烈的温度冲击作用;随着系统持续运行,管壁-路面材料界面的温变速率逐渐减小并趋于稳定,且小于普通路面最大温变速率;同时,融雪系统的运行增大了路面结构内部的温度梯度,改变了路面结构一定深度范围内的热量传递方向。融雪系统道路结构年周期温度分布的观测结果表明:融雪系统的运行可在较短的时间内释放大量热能,降低了道路结构内部热量的散失,有效延缓了季节性冰冻地区冬季道路结构温度的降低及冻结深度的发展。To understand the impact of hydronic heated pavement operation on the short-/long-term temperature distribution characteristics in pavement profile,the temperature collected by the thermal sensors from a full-scale hydronic snow melting system was analyzed.The temperature,temperature change rate,and temperature gradient under the plain pavement were compared with that using hydronic snow-melting system.The effect of hydronic heated pavement operation on the short-/long-term temperature distribution characteristics in pavement was illustrated.Test results show that at the beginning of system operation,there is a sharp thermal shock at the pipe-pavement material interface due to the rapidly increasing fluid temperature.With the system operation,the temperature change rate at the pipe-pavement material interface decreases gradually and is much less than the maximum temperature change rate in the plain pavement.Moreover,the temperature gradient in pavement also significantly increases by the system operation.Long-term observation of pavement temperature demonstrated that the release of heat energy in hydronic snow-melting system reduces the heat loss of pavement in winter and delays the degradation of pavement temperature and the development of frozen depth.

关 键 词：道路工程 流体加热融雪系统 道路结构 温变速率 温度梯度 冻结深度 

分 类 号：U416[交通运输工程—道路与铁道工程]