Research on Treatment and Measurement of Water Inrush During Construction of Ventilation Inclined Shafts in Tunnel
This paper takes the large slope Yuelongmen Tunnel as the research object,and studies the disposal measures and measurement problems of ventilation inclined well construction.The results show that in the analysis of tunnel water inflow,it is necessary to combine the geological conditions and comprehensively use the precipitation infiltration method,underground runoff modular method and groundwater dynamics method,which can bring more reliable data guarantee for tunnel construction.There is limestone dissolution fissure in some areas of the construction section of Yuelongmen Tunnel,and the rock mass in some areas is relatively broken,which brings certain convenience for groundwater enrichment.According to the water gushing characteristics of the diversion tunnel,the advanced small catheter grouting technology provides grouting water stop for the construction section.Before and after excavation,the water quantity and water pressure are large when drilling,and the water quantity is significantly reduced after blasting.By using a variety of methods,the water inflow is maintained within 395 m3/h,and the water gushing pressure is 0.9 MPa.
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