铁道标准设计2025，Vol.69Issue(11)：178-187,10.DOI:10.13238/j.issn.1004-2954.202311020006
兰新二线祁连山铁路1号隧道温度场规律现场实测研究
Research on Field Measurement of Temperature Field Patterns in No.1 Qilian Mountain Tunnel of Second Line of Lanzhou-Xinjiang High-Speed Railway
摘要
Abstract
In High-altitude cold regions,long railway tunnels pose challenges due to their extensive tunnel length,high technical requirements,and limited field-measured temperature data.This makes it difficult to explore the variation patterns of their temperature fields and provide theoretical guidance for cold-resistance design in related projects.Taking the Qilian Mountain Tunnel on the new Second Line of Lanzhou-Xinjiang High-speed railway as the engineering case,this study monitored the meteorological elements outside the tunnel,air temperature inside the tunnel,and longitudinal temperature using automated intelligent monitoring technology for cold-region tunnels,so as to investigate the variation patterns of the temperature field.The results showed that the Qilian Mountain Tunnel was affected by strong natural winds,and a dominant airflow from outside to inside was formed both in summer and winter.With increasing distance from the tunnel entrance,the annual average temperature generally increased in a linear function pattern,while the annual temperature amplitude decreased approximately following a power function pattern.With increasing distance from the tunnel exit,the annual average temperature generally increased in a linear function pattern,while the annual temperature amplitude decreased approximately following a logarithmic function pattern.The variation pattern along the longitudinal length of the tunnel was greatly affected by net pressure differences and thermal potential differences.The air temperature tended to stabilize closer to the central section,with the maximum air temperature amplitude difference of 15.5℃observed between two adjacent cross-sections.The cross-sections on both sides of the tunnel portals experienced longer periods of negative temperature,with the maximum proportion of negative temperature time in a year reaching 55.8％.The length of the negative temperature segment was about 1 500 m at the entrance and about 5 000 m at the exit.In the coldest month,the longitudinal variation of tunnel air temperature generally increased first and then showed a decreasing trend after 2 500 m,and the temperature at the exit end was 1 1.7 ℃ lower on average than that at the entrance.关键词
寒区隧道/铁路隧道/温度场/纵向温度/空气温度/变化规律/现场实测Key words
cold-region tunnel/railway tunnel/temperature field/longitudinal temperature/air temperature/variation pattern/field measurement分类
交通运输引用本文复制引用
郭硕栋,刘晓瑞,徐冲,郭佳奇,毋文涛..兰新二线祁连山铁路1号隧道温度场规律现场实测研究[J].铁道标准设计,2025,69(11):178-187,10.基金项目
国家自然科学基金项目(52178388) （52178388）
中铁第一勘察设计院集团有限公司科研项目(20-36) （20-36）
中交二公局局级重点科技研发项目(H21-134) （H21-134）
