摘要
高温热害是川藏铁路面临的主要地质灾害之一。折多山一带地处地热资源丰富的康定地热田,隧道热害问题突出。由于高原山区的交通和施工条件恶劣,在部分区域钻探或其他物探手段难以施展。为了更加精确地预测隧道沿线围岩温度场分布特征,弥补在困难地区勘察工作的不足,基于现场调查获取的地质资料,考虑断层、岩性、地温、地下水等因素,结合稳态法地热研究理论,建立折多山区域地热场模拟数值模型,揭示A隧道方案沿线围岩温度场分布特征;并在前人研究的基础上,对隧道沿线热害危险性进行了分区评价,为隧道线路的选址、设计和施工方案的确定提供参考依据。
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.
作者
赵志宏
徐浩然
刘峰
魏帅超
张薇
王贵玲
ZHAO Zhihong;XU Haoran;LIU Feng;WEI Shuaichao;ZHANG Wei;WANG Guiling(Department of Civil Engineering,Tsinghua University,Beijing 100084,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang,Hebei 050061,China;Technology Innovation Center of Geothermal&Hot Dry Rock Exploration and Development,Ministry of Natural Resources,Shijiazhuang,Hebei 050061,China)
出处
《现代地质》
CAS
CSCD
北大核心
2021年第1期180-187,共8页
Geoscience
基金
中国地质调查局地质调查项目(DD20190128,DD20160190)
中国地质调查局“支撑服务川藏铁路规划建设地质调查”项目(20190505)。
关键词
川藏铁路
折多山段隧道
地温场
热害
数值模拟
Sichuan-Tibet railway
tunnel in Zheduoshan region
geothermal field
thermal damage
numericalsimulation
