Research on Water Inflow Prediction of Extra-long Tunnel of Huzhu Beishan
[Purposes]In order to provide a basis for tunnel design and construction,it is necessary to pre-dict the water inflow of the tunnel.[Methods]Based on the investigation report,this paper took the extra-long tunnel of Huzhu Beishan in Qinghai Province as an example,comprehensively analyzed its physical geography and engineering geological conditions,analyzed the chemical characteristics of surface water and groundwater in detail,and used precipitation infiltration coefficient method,underground runoff modulus method and groundwater dynamic method to predict and analyze the water inflow in the tunnel site area.[Findings]The results show that the calculation result of underground runoff modulus method is more favorable to the guarantee of construction safety.[Conclusions]This study has certain reference significance for the water inflow prediction of similar long tunnel.
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