摘要
寒区隧道冻害问题时有发生,深入研究温度场分布规律及围岩特性对其的影响对解决冻害问题至关重要。文章依托辽宁省某寒区公路隧道,采用理论分析、数值计算等手段对热-流-固耦合作用下的寒区隧道温度场进行研究,得出了隧道纵断面和横断面的温度场分布规律,分析了围岩初始地温和导热系数对寒区隧道温度场的影响规律。研究发现,初始地温越高、导热系数越小,越有利于负温气流影响下的寒区隧道抗防冻工作,可为后续类似工程的抗防冻设计提供借鉴和指导。
Since freezing damage occasionally occurs in cold region tunnels, it is very important to study the tem- perature field distribution and effects of surrounding rock properties. Based on a highway tunnel in Liaoning prov- ince, theoretical analysis and numerical simulation were used to study the temperature field of cold region tunnels under the effects of thermal-fluid-solid coupling, the temperature field distribution along the longitudinal profile and cross section of tunnels was obtained and the influence of the initial ground temperature and thermal conductivi- ty coefficient of surrounding rock on the temperature field in cold region tunnels was studied. Findings indicate that the higher the initial ground temperature, the smaller the thermal conductivity coefficient, and that it is better to solve the freezing problems in cold region tunnels under the influence of a negative temperature airflow. This paper provides reference and guidance for anti-freezing design in similar tunnels.
出处
《现代隧道技术》
EI
CSCD
北大核心
2016年第6期67-72,共6页
Modern Tunnelling Technology
基金
国家自然科学基金资助项目(51678495,51578463)
西南交通大学科技创新项目(2682015CX089)
关键词
寒区隧道
温度场
围岩特性
热-流-固耦合
Tunnel in cold region
Temperature field
Surrounding rock properties
Thermal-fluid-solid coupling
