玉蒙铁路旧寨隧道高温地热水分析研究

Study on High Temperature Geothermal Water in Jiuzhai Tunnel on Yuxi-Mengzi Railway

研究目的:查明隧道内高温地热水的成因、来源及其补给、径流和排泄特征,为高温地热隧道设计、施工提供可靠的依据,对类似地质环境条件下的工程勘察提供参考。研究结论:隧道内地下水(热水)来源于大气降水补给,通过断裂带(或其影响带)循环、加温后,向河谷运移排泄;隧道轴线与地下水流向大角度相交,开挖后,热水涌出形成隧道内高温;隧道通过全新活动断裂带,尤其是地表有温泉出露区域,应注意对高温地热的勘察、分析。

Research purposes： It is necessary to find out the formation cause, original resource, recharge, runoff and discharge features of geothermal water for the purposes of providing reliable basis data for design and construction of the tunnel with high temperature geothermal and reference to the engineering geological investigation for similar geological condition. Research conclusions：The high tenlperature geothermal water comes from meteoric rain, moves through fault zones （or influence zones） to be heated and transfers towards valley to be drained. The temperature inside the tunnel raises high by hot water gushing after the tunnel was excavated because the tunnel＇s axis intersects the direction of groundwater with large angle. When tunnel passes the fault zones, we should pay more attention to surveying and analyzing the high temperature geothermal.