Influence law of meteorological elements on radial temperature field of tunnel in a cold region#br#
Sun Keguo1 Liu Jianzheng2 Yu Mingzhao1 Zhong Xiaochun2 Lian Xiaoliang2 Wu Hongcheng3 Li Gang4
1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;
2. Qinghai Minmetals China Railway Highway Construction Management Co., Ltd., Xining 810008, China;
3. China Railway No5 Engineering Bureau Group Co., Ltd., Changsha 410007, China;
4. Traffic Engineering Technology Service Center of Qinghai Province, Xining 810003, China
Abstract： In areas with seasonal freezing, the severe meteorological conditions are the main cause of freezing damage to tunnel linings. This study considered a highway tunnel in a cold region and investigated the influence of different meteorological conditions on the tunnel’s radial temperature field distribution. The measured field data were compared with the numerical simulation results to verify the accuracy of the calculation method and parameter values. Then, the influence of the time, tunnel temperature, and initial ground temperature on the radial temperature field was analyzed using the single-factor cycle method. In winter, the depth of freezing and the temperature change at the tunnel invert are higher than those at other parts of the tunnel. The freezing and temperature change ranges at the invert are 0.323-4.78 m and 6.669-7.404 m, respectively, and obviously higher than those at other parts of the tunnel. The depth of freezing and temperature changing zone decrease from the tunnel invert to the vault. The temperature field distribution of the tunnel section was quantitatively analyzed under various meteorological conditions, and the formula for calculating the freezing depth and temperature change depth at the invert was established under combined initial ground temperature and air temperature conditions. The findings of this study can provide a reference for the anti-freezing design of tunnels in cold regions.
孙克国 刘建正 于铭钊 钟小春 连小良 吴红承 李刚. 气象要素对寒区隧道径向温度场影响规律研究[J]. 土木工程学报, 2021, 54(S): 140-148.
Sun Keguo Liu Jianzheng Yu Mingzhao Zhong Xiaochun Lian Xiaoliang Wu Hongcheng Li Gang. Influence law of meteorological elements on radial temperature field of tunnel in a cold region#br#. 土木工程学报, 2021, 54(S): 140-148.
