Research on the Application of Advanced Curtain Grouting Construction Technology in the Construction of High Altitude Long and Rich Water Tunnel
In order to solve the problem of water inrush in high-altitude long and rich water tunnel,this paper takes a new plateau tunnel as the research object,evaluates the water inflow of each section of the tunnel in sections,and predicts that the water inrush and mud gushing sections may be treated by advanced curtain grouting.The results show that the lithology and structure of the surrounding rock of the tunnel are complex,and there are mainly 13 faults related to the tunnel.These structural areas are easy to form groundwater drainage channels and water storage areas,resulting in large initial water inflow and high risk of sudden water inflow.The advance curtain grouting set a 2m thick slurry wall on the tunnel face,and the cement-water glass double slurry was used for curtain grouting,and the advance grouting distance was 30m.The process effectively solved the water gushing problem in the water-rich fracture zone of the tunnel.
long tunneladvanced curtain groutingwater-rich fracture zoneprediction of water inflow
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