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geothermal anomalies in the xianshuihe area: Implications for tunnel construction along the Sichuan-Tibet Railway, China

引用

Journal of Groundwater Science and Engineering 2023年第3期11卷 237-248页

作者： Feng Liu Wei Zhang Gui-ling Wang Shuai-chao Wei Chen Yue Guang-zheng Jiang Yu-zhong Liao Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological ScienceShijiazhuang 050061China China University of Geosciences(Beijing) Beijing 100083China Technology Innovation Center of geothermal&Hot Dry Rock Exploration and Development Ministry of Natural ResourcesShijiazhuang 050061China Chengdu University of Technology Chengdu 610059China

This study presents a comprehensively analysis of geothermal characteristics in the xianshuihe geothermal area along the Sichuan-Tibet Railway,using temperature logging,temperature monitoring and thermal conductivity measurement,and regional geothermal geological survey *** research focuses on the geothermal background,geothermal field,and their potential impact on the surrounding *** investigation reveals that the average heat flow value in the study area is approximately 73.0 mW/m^(2),significantly higher than the average terrestrial heat flow in China's Mainland(62.5 mW/m^(2)).This high terrestrial heat flow signifies a distinct thermal background in the *** addition,geothermal anomalies in the area are found to be closely associated with the distribution of hot springs along NW faults,indicating a strong control by the xianshuihe fault *** study concludes that the region's favorable conditions for geothermal resources are attributed to the combination of high terrestrial heatflow background and water-conducting ***,these conditions also pose a potential threat of heat damage to the tunnels along the Sichuan-Tibet *** evaluate the risk,the research takes into account the terrestrial heat flow,thermal conductivity of the tunnel surrounding rocks,characteristics of the regional constant temperature layer,as well as the distribution of hot springs and *** analysis specifically focuses on the thermal damage risk of Kangding 1# tunnel and 2# tunnel passing through the study *** on the findings,it is determined that Kangding 1# tunnel and 2# tunnel have relatively low risk of heat damage,as they have avoided most of the high temperature anomaly ***,several sections of the tunnels do traverse zones with low to medium temperatures,where surface rock temperatures can reach up to 45℃.Therefore,these regions should not be neglected during the construction and operation of the tunnel project,and mitigation measu

关键词： xianshuihe geothermal zone Terrestrial heat flow Hot spring Tunnel Heat damage

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