季节性冻土区路基专用太阳能主动供热装置研究  

Study on Solar Active Heating Device for Subgrade in Seasonally Frozen Soil Region

作　　者：胡田飞 刘建坤 岳祖润[1,2] 鲍榴 于凯凯 张竣洋 HU Tianfei;LIU Jiankun;YUE Zurun;BAO Liu;YU Kaikai;ZHANG Junyang(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;School of Civil Engineering,Sun Yat-Sen University,Guangzhou Guangdong 510275,China;Institute of Computing Technology,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Suzhou Metro Line 1 Co.,Ltd.,Suzhou Jiangsu 215000,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [2]石家庄铁道大学土木工程学院,河北石家庄050043 [3]中山大学土木工程学院,广东广州510275 [4]中国铁道科学研究院集团有限公司电子计算技术研究所,北京100081 [5]苏州轨道交通市域一号线有限公司,江苏苏州215000

出　　处：《中国铁道科学》2021年第2期39-49,共11页China Railway Science

基　　金：国家自然科学基金资助项目(42001059,41731281);河北省自然科学基金资助项目(E2020210044);河北省高等学校科学技术研究项目(QN2020180)。

摘　　要：基于季节性冻土区路基冻胀特征及供热需求分析,设计1款采用太阳能主动供热的路基专用供热装置。通过模型试验分析装置供热温度、供热量、供热效率随太阳辐照量的变化规律,建立考虑纬度和日序数的供热温度预测公式。通过对路基长期供热效果的数值模拟分析,研究装置防冻胀效果。结果表明:路基专用供热装置供热温度随太阳辐照量的提高而增大,最高达60℃,平均范围在20~40℃,太阳能有效热利用率约为26%;供热温度与太阳辐照量呈3次多项式函数关系,供热温度计算式可预测装置应用于不同地区时的逐日平均供热温度;该装置在季节性冻土区对路基起到暖季预储热量和冬季实时补充热量的作用,可有效提高入冬时路基的抗冻胀能力,降低冻胀程度。Based on the analysis of frost heaving characteristics of subgrade and its heating demand in seasonally frozen soil regions,a special solar heating device for subgrade was designed in this study.The change rule of heating temperature,heating capacity and heating efficiency of the novel device with the solar radiation was analyzed by model testing.A prediction formula for the heating temperature of the device considering latitude and daily order was further established.Numerical simulation analysis on the long-term heating effect of an actual subgrade was also carried out,to demonstrate the anti-freezing effect of solar heating device.Results show that the heating temperature of the special heating device for subgrade increases with the increase of solar radiation,and its maximum value can reach above 60℃,with an average range of 20~40℃.The effective heat utilization rate of solar energy is about 26%.The relationship between the heating temperature and the solar radiation is a cubic polynomial function.The calculation formula of heating temperature can predict the daily average heating temperature when the device is applied in different areas.The device can pre store heat in warm season and supplement heat in real time in winter for subgrade in seasonally frozen soil regions,which can effectively improve the frost heave resistance of subgrade in winter and reduce the frost heave degree.

关 键 词：季节性冻土区 路基 供热装置 防冻 太阳能 

分 类 号：U213.14[交通运输工程—道路与铁道工程] TK513[动力工程及工程热物理—热能工程]