摘要
地热是拉日铁路吉沃希嘎隧道施工中的主要工程地质问题,查明隧址区地热分布特征,并且制定高温热害防治措施非常重要。勘察中结合物探异常数据,布置钻孔实测地温,绘制测温曲线,揭示了隧址区地热分布规律;通过钻孔测温数据和地温梯度值对隧道地热异常区地温分级和预测。同时在分析区域地热地质背景的基础上,较为详细地评价了地热成因及高温热害对隧道建设的影响,并给出了相应的防治措施。
Geothermal anomaly is the major engineering geological problem in the construction of Jiwoxiga Tunnel on Lasa-Shigatse Railway. Therefore, it is very important to find out the geothermal energy distribution characteristics for the tunnel site and develop some relevant measures for controlling the heat damage. For this reason, in this research, the boreholes was arranged to detect the ground temperature on site in combination with the abnormal data obtained by geophysical prospecting; the temperature curve was drawn out; and the geothermal energy distribution characteristics in the tunnel site was revealed. Furthermore, this research carried out classification and forecast on the ground temperature of the geothermal anomaly area for the tunnel site based on the borehole temperature measurement data and the geothermal gradient values. In addition, after analysis on the geological condition of the geothermal anomaly area, this research assessed in detail the root cause of the geothermal anomaly, researched the influence of the heat damage on the tunnel construction, and finally proposed the relevant prevention and control measures.
出处
《铁道标准设计》
北大核心
2014年第7期107-112,共6页
Railway Standard Design
关键词
铁路隧道
高原地热隧道
地温分级预测
热害防治
railway tunnel
tunnel in geothermal area of plateau
ground temperature classification andforecast
heat damage prevention and control
