铁道标准设计2017，Vol.61Issue(10)：105-111,7.DOI:10.13238/j.issn.1004-2954.2017.10.022
寒区隧道温度场分布规律及保温层适应性研究
Research on Distribution Law of Temperature Field of Tunnel in Cold Region and Thermal Insulation Layer Adaptability
摘要
Abstract
In order to study the thermal insulation of tunnel in cold region,the numerical simulation method is used to identify the distribution law and thermal insulation layer adaptability of temperature field of tunnel in cold region under such different conditions as the ambient temperature,the ground temperature of surrounding rock,and the presence or absence of thermal insulation layer.According to the superposition principle,the separation variable method and the Bessel characteristic function,the calculation model of temperature field of tunnel in cold region under the influence of train induced wind is established,and the distribution law of temperature field of tunnel in cold region with or without train operation is also analyzed.The results show that,as the negative temperature distribution appearing after tunnel secondary lining has great influence on the safety of tunnel lining structure,no negative temperature distribution after tunnel lining structure is recommended as the control index of insulation measures for tunnels in cold region.Independence of the influence of train wind,thermal insulation layer method is most suitable for the area where the average temperature of the coldest month is between-2 DEG and-15 DEG;while the average temperature of the coldest month is lower than-15 DEG and the ground temperature of surrounding rock is lower than 5 DEG,thermal insulation layer method should be combined with active thermal insulation measures.When the train speed is 300 km/h and the operation interval is 30 min,the average temperature drop in the middle of tunnel is about 1.22 DEG with train operation compared with that without train operation,and the distance where negative temperature appears after secondary lining increases by about 36.8％ along the length of the tunnel.关键词
寒区隧道/温度场/列车风/控制指标/保温层Key words
Tunnel in cold region/Temperature field/Train wind/Control index/Thermal insulation layer分类
交通工程引用本文复制引用
高焱,朱永全,耿纪莹,崔蓬勃,辛浩..寒区隧道温度场分布规律及保温层适应性研究[J].铁道标准设计,2017,61(10):105-111,7.基金项目
国家科技支撑计划(2012BAG05B00) （2012BAG05B00）
国家科研开发计划(2016G002-A) （2016G002-A）
