• ISSN 0258-2724
  • CN 51-1277/U
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Volume 55 Issue 2
Mar.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(2): 256-264, 289.
SUN Keguo, LI Si, XU Weiping, XIAO Zhifei, LI Haobo, XU Yuping. Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel[J]. Journal of Southwest Jiaotong University, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530
Citation: SUN Keguo, LI Si, XU Weiping, XIAO Zhifei, LI Haobo, XU Yuping. Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel[J]. Journal of Southwest Jiaotong University, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530
shu

Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel

doi: 10.3969/j.issn.0258-2724.20180530
  • Received Date: 30 Nov 2017
  • Rev Recd Date: 18 Dec 2018
    • Available Online: 28 Dec 2018
  • Publish Date: 01 Apr 2020
    Abstract
  • The temperature field of a tunnel in cold region is crucial to its antifreezing design, and the thermal conductivity of the supporting structure and surrounding rock has a significant effect on the temporal and spatial distributions of the temperature field. Taking a highway tunnel in cold region as the prototype calculation model, methodologies including theoretical derivation, field measurement and numerical simulation are used to study the influence of thermal conductivity on the temporal and spatial distributions of tunnel temperature filed. Results show as follows: At any time the temperature of each point in the variable temperature circle decreases with the growth of thermal conductivity of the supporting structure; and the larger the thermal conductivity of the supporting structure, the smaller the temperature reduction rate at the same position. At any time the temperature of supporting structure increases with the growth of thermal conductivity of surrounding rock, but the temperature variation of surrounding rock is characterized by regionalization. That is, the surrounding rock can be divided into zones Ι and Ⅱ. As the thermal conductivity of the surrounding rock increases, the temperature in zone Ι increases, while the temperature in zone Ⅱ decreases. What’s more, the slope and intercept of the boundaries between zones Ι and Ⅱ are greater at a larger time scale. The research results can provide references for the antifreezing design and route selection of tunnels in cold regions.

     

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