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Geoscience ›› 2021, Vol. 35 ›› Issue (01): 180-187.DOI: 10.19657/j.geoscience.1000-8527.2021.022

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Preliminary Prediction of Temperature Field and Thermal Damage in Zheduoshan Region Along Sichuan-Tibet Railway

ZHAO Zhihong1(), XU Haoran1, LIU Feng2,3, WEI Shuaichao2,3, ZHANG Wei2,3, WANG Guiling2,3()   

  1. 1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China
    2. Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang, Hebei 050061, China
    3. Technology Innovation Center of Geothermal & Hot Dry Rock Exploration and Development, Ministry of Natural Resources,Shijiazhuang, Hebei 050061, China
  • Received:2020-10-08 Revised:2020-12-25 Online:2021-02-12 Published:2021-03-12
  • Contact: WANG Guiling

Abstract:

Heat harm is a common geological hazard in Sichuan-Tibet railway, China. Zheduoshan region is located in the Kangding geothermal field with abundant geothermal resources, which may induce severe thermal damages. Due to the poor traffic and construction conditions in plateau mountainous area, drilling and other geophysical surveys cannot be easily applied. To precisely predict the surrounding rock temperature along the tunnel and compensate for the lack of geological exploration in difficult terranes, a numerical model of tunnel A along the railway line is built and calibrated based on geological data. Faults, lithology, geothermal temperature, groundwater, and other factors are considered in the model based on geothermal theory. The temperature distribution in the surrounding rocks of the tunnel is revealed. In addition, we evaluate the thermal damage risks along the planned tunnel, which would be useful for its site selection, design and construction.

Key words: Sichuan-Tibet railway, tunnel in Zheduoshan region, geothermal field, thermal damage, numericalsimulation

CLC Number: