摘要
采用便携式U盘温度传感器,对东北高纬度寒区某铁路隧道洞内空气温度进行现场测试与分析。结果表明:测试期间,该隧道各测试断面温度时程呈现正弦函数式分布,纵向温度呈现“中间高、两端低”的近似倒“U”形状的抛物线型分布,且隧道进口段温度低于出口段。究其原因为冬季受自然风以及温度浮升效应的影响,形成风向由洞外吹向洞内、进口吹向出口的主导风,导致出现洞内温度高于洞外、出口段温度高于进口的现象,且影响范围大致为进口段2500 m,因此对于两端高差明显的隧道,需在高程低的洞口端适当延长抗寒设防长度。该隧道冬季负温段占全隧长度的100%,最冷月为1月,此时应加强冻害防治,避免影响行车安全。
This paper uses a portable USB temperature sensor to conduct on-site test and analysis of the air temperature inside a railway tunnel in a high-latitude cold region in Northeast China.The results indicate that during the test period,the temperature time history of each test section in the tunnel exhibits a sinusoidal distribution,the longitudinal temperature exhibits an approximately inverted“U”-shaped parabolic distribution characterized by“high in the middle and low at both ends”,and the temperature at the tunnel entrance section is lower than that at the exit section.The reason lies in the influence of natural wind and temperature buoyancy effect during winter,forming a dominant wind direction that blows from outside the tunnel to inside,and from the entrance toward the exit.This results in the phenomenon where the temperature inside the tunnel is higher than outside,and the temperature at the exit section is higher than at the entrance.The affected area is approximately 2,500 m from the entrance section.Therefore,for tunnels with significant elevation differences at both ends,it is necessary to appropriately extend the cold protection length at the low-elevation portal end.The negative temperature section of the tunnel during winter accounts for 100%of the total length of the tunnel,and the coldest month is January.At this time,frost heaving prevention and control shall be strengthened to avoid affecting train operation safety.
作者
郑泽福
马伟斌
刘小平
郭小雄
雷占山
徐湉源
李葳
ZHENG Zefu;MA Weibin;LIU Xiaoping;GUO Xiaoxiong;LEI Zhanshan;XU Tianyuan;LI Wei(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;State Key Laboratory for Track System of High Speed Railway,Beijing 100081,China;Xining Track Maintenance Depot,China Railway Qinghai-Tibet Group Co.,Ltd.,Xining Qinghai 810006,China)
出处
《中国铁路》
北大核心
2025年第8期40-44,52,共6页
China Railway
基金
中国国家铁路集团有限公司科技研究开发计划项目(N2021G057)
中国铁道科学研究院集团有限公司科研开发基金项目(2021YJ081)
青藏公司课题(QZ2023-G03)
西藏自治区重大专项(XZ202402ZD0003-04)。
关键词
高纬度寒区
铁路隧道
温度场
现场测试
自然风
high-latitude cold region
railway tunnel
temperature field
on-site test
natural wind
