Research on Geothermal Characteristics and Geological Route Selection of Active Faults in Dali-Lincang Railway Area
Dali-Lincang Railway crosses the Lancang River and passes through the Yunxian Lincang granite body.The terrain,topography,and geological conditions are complex,and the installation of long tunnels on the railway is inevitable.The project is arduous,and the control line scheme for deep and large active faults and high temperature thermal hazards is proposed.Based on the geological survey of the Baishi Tunnel,this study analyzed the multi-stage superimposed intrusion and formation mechanism of the regional granite rock mass,as well as the active faults,geothermal distribution characteristics,and geothermal genesis in Fengqing-Yun County-Lincang hydrothermal activity zone.A comprehensive geological route selection study was carried out for railways in difficult mountainous areas on the plateau,successfully avoiding the regional geothermal anomaly zone.The normal temperature zone was recommended as the tunnel route plan.After construction verification,the recommended plan was reasonable and feasible.
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