摘要
解决高地温隧道热害问题的前提是掌握隧道结构与高温围岩及隧道内空气间的传热规律。根据能量守恒定律,建立隧道空气-隧道衬砌-高温围岩的二维非稳态传热有限差分方程,分析季节性风温、不同程度高地温和铺设隔热层等对高地温隧道传热的影响。得到了隧道开挖后,围岩温度随自然风变化的规律、调热圈厚度变化规律和隔热层厚度对高地温隧道降温的影响等结果。研究所得结论可为高地温隧道施工及运营过程中的降温技术提供理论依据。
To solve the problem of heat- harm in high- temperature geothermal region tunnals,the heat transfer law between air,tunnel and surrounding rocks should be clarified firetly. According to the law of conservation of energy,the two- dimension unsteady heat transfer model is used to establish the finite difference equations of air,tunnel and surrounding rocks. The temperature of lining and surrounding rocks under seasonal wind,different levels of high geothermal and with heat insulation layer is analyzed. The conclusions can be theoretically used in the cooling technique of tunnels in high- temperature geothermal regions.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2015年第6期1406-1411,共6页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51278426)
关键词
高地温隧道
温度场
数值解
调热圈
隔热层
high geo-temperature tunnel
temperature field
numerical solution
control heat circle
heat insulation layer
