高寒隧道围岩蓄热型防冻系统及其防冻效果影响因素分析  

Thermal Storage Antifreeze System and Its Influencing Factors Analysis in High Cold-region Tunnel

作　　者：张瑶 夏才初 彭文波[4] 张建新 胡云进 ZHANG Yao;XIA Cai-chu;PENG Wen-bo;ZHANG Jian-xin;HU Yun-jin(Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Institute of Rock Mechanics,Ningbo University,Ningbo 315211,Zhejiang,China;Ningbo Key Laboratory of Energy Geostructure,Ningbo University,Ningbo 315211,Zhejiang,China;China Communications Construction Company Second Highway Consultants Co.Ltd.,Wuhan 430056,Hubei,China;Xinjiang Transportation Planning,Survey,Design and Research Institute Co.Ltd.,Urumchi 830022,Zhejiang,China;School of Civil Engineering,Shaoxing University,Shaoxing 312000,Zhejiang,China)

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]宁波大学岩石力学研究所,浙江宁波315211 [3]宁波大学宁波市能源地下结构重点实验室,浙江宁波315211 [4]中交第二公路勘察设计研究院有限公司,湖北武汉430056 [5]新疆交通规划勘察设计研究院有限公司,新疆乌鲁木齐830022 [6]绍兴文理学院土木工程学院,浙江绍兴312000

出　　处：《中国公路学报》2024年第10期151-161,共11页China Journal of Highway and Transport

基　　金：新疆维吾尔自治区科技重大专项(2020A03003-2);浙江省自然科学基金重点项目(LZ22E080008)。

摘　　要：为经济有效解决高寒隧道冻害问题,提出一种新型隧道围岩蓄热型防冻系统,并将其应用于新疆乌尉高速天山胜利隧道洞口段围岩的蓄热和防冻。建立三维隧道围岩蓄热耦合传热模型,通过与现场蓄热热响应试验数据进行对比,证实了该系的统蓄热能力及模型可靠性;并在此基础上,研究该系统的围岩蓄热特性及其防冻效果,分析蓄热管入口温度、间距、运行状态对该系统隧道围岩蓄热量和防冻效果的影响。结果表明:当蓄热管入口温度为35℃,且蓄热运行60 d时,天山胜利隧道右线入口段全年不会发生冻害。随着入口温度的增加,围岩蓄热量和二衬背后温度均线性增加,且当蓄热入口温度增大到40℃时,该系统防冻效果提升了14.55%;蓄热管间距越小,越有利于隧道二衬背后温度提升和洞口段防冻,当蓄热管间距由0.46 m减小到0.3 m时,二衬背后温度由18.86℃增加至24.12℃,防冻效果显著提升了27.89%;蓄热间歇运行有利于提高蓄热系统效率,而蓄热运行持续时间越长,越有利于防冻。研究成果可为隧道围岩蓄热性防冻系统在高寒隧道的蓄热防冻应用提供理论方法及技术支持。To economically and effectively solve the problem of freezing damage in high cold-region tunnels,a new type of heat storage antifreeze system for tunnel surrounding rock was proposed and applied to the Tianshan Shengli Tunnel of Wuwei Expressway in Xinjiang,considering heat storage and frost protection in tunnel entrance.A three-dimensional heat storage coupled heat transfer model for tunnel surrounding rock was established,and the heat storage capacity and model reliability of the system were confirmed through comparison with on-site heat storage and heat response test data.The thermal storage characteristics of the tunnel surrounding rock and its antifreeze effect were investigated,and the influences of inlet temperature,pipe spacing,and operating state on the heat storage power and antifreeze effect of the system were analyzed.The results show that when the inlet temperature is 35℃and the heat storage operation is 60 days,freezing damage does not occur at the entrance of the Tianshan Shengli Tunnel.Both the heat storage power and the temperature behind the secondary lining increase linearly with an increase in the inlet temperature:when the inlet temperature increases to 40℃,the antifreeze effect of the system increases by 14.55%.The smaller the pipe spacing between the heat storage pipes,the more conducive to the temperature increase behind the secondary lining and the antifreeze effect,when the pipe spacing is reduced from 0.46 to 0.3 m,the temperature behind the secondary lining increases from 18.86 to 24.12℃,and the antifreeze effect significantly increases by 27.89%.Intermittent operation during the heat storage period contributes to improvement in the efficiency of the heat storage system,and the longer the duration of the heat storage operation,the more favorable it is for anti-freezing.The research results provide theoretical methods and technical support for heat storage and frost prevention systems of the surrounding rock in high-cold-region tunnels.

关 键 词：隧道工程 高寒隧道 隧道围岩蓄热型防冻系统 蓄热特性 防冻效果 

分 类 号：U45[建筑科学—桥梁与隧道工程]