考虑温泉影响的深埋长隧洞温度场研究

在富热地区修建埋深大、洞线长的隧道,往往由于其所处的特殊地质环境而遇到高地温问题.采用传统的热传导方法对温度进行预测,在遇到有地下水或局部基岩裂隙水时,由于不能考虑到水流活动对温度场的影响,会得到与实际相差很大的结果.针对齐热哈塔尔水电站引水隧道开挖过程中出现较严重的热害问题,依据热传导-对流模型,采用Z-SOIL.PC 2010软件对隧洞温度场进行数值分析,研究了隧址区发育的泉水对温度异常的影响.温泉对隧道洞线方向一定范围内温度分布有较大的影响,同时随着垂向深度增加,这种影响逐渐减弱,进而对隧址区温度场进行了区域划分,为同类隧道热害预防和处理提供一定参考.

Study of Temperature Fields in Deep Long Tunnel Considering Effect of Hot Springs

Deep long tunnel constructed in excess heat area usually faces high geothermal problem because of its special geological environment. When facing with groundwater and bedrock tissue water, using the tradi- tional method of heat transfer to predict temperature, the calculation results will be rather differernt from the actual results. Aiming at the serious heat injury problems in Qirehataer diversion tunnel and according to heat transfer-convection model, using Z-SOIL. PC 2010 software to analyze the tunnel thermal fields effected by hot springs. Hot springs have obvious effects on temperature distribution in a certain range of tunnel line di- rection; meanwhile, the effects weaken gradually with the vertical depth increase; and then dividing the re- gion of tunnel thermal fields, so as to give reference for similar tunnel heat injury prevention and treatment.