Research On Geological Advance Prediction For The Tunnel Of Jinping â…¡ Hydropower Station

With rapid economic development and large-scale infrastructure construction, the scale of tunnel project in the mountainous region increase, thus tunnel geological disasters have become more complex. Geological advance prediction could solve these problem effectively. The geological condition of Jinpingâ…¡hydropower station tunnel is extremely complicated, during construction, construction safety threat include water inrush, rock burst, landslides and other geological hazards. Based on the analysis of tunnel advance prediction, a detailed geological survey is carried out in Jinpingâ…¡hydropower station site, in addition analysis tunnel advance prediction method and the problem in practical application. In particular, theory, principle, test methods, benefits and drawbacks of TSP203, TEM, ground penetrating radar, land-sonar, infra-red was analyzed, and combined with practical application effect in Jinpingâ…¡hydropower station in the tunneling, provide a reliable theoretical prediction and the reference model for Jinping Hydropower Station tunneling in the future.On this basis, a tunnel geological prediction system is developed which based on geological analysis and combined with geophysical methods. According to information entropy, the weight of influencing factor is assessed, in order to select the appropriate geological prediction method. Provide more reliable prediction and more convenient way during tunnel excavation and construction.