The Prediction And Research Of Water Inrush Disasters About Furen Mountain Tunnel In The Line Of Xi’an-Chengdu

The study is based on the Xi’an-Chengdu Passenger Line of Furen mountain tunnel, from the structural geology and hydrogeology, Furen mountain tunnel engineering geological and hydrogeological conditions are analyzed, combining Furen mountain tunnel’s construction, describes the relationship between Furen mountain tunnel site groundwater types, occurrence regularity and structural and lithologic.Through from quantitative analysis and qualitative analysis two aspects respectively by theoretical calculation and geophysical prospecting method, For Furen mountain tunnel surge water inrush prediction and analysis. The quantitative analysis by atmospheric precipitation in infiltration 、groundwater runoff modulus method and groundwater dynamics method of three kinds of methods for computational prediction and qualitative analysis using infrared water detecting and geological radar detection analysis and prediction. According to the quantitative analysis method of the grey system theory to verify the theoretical calculation of predicted results is correct, and for qualitative geophysical methods to forecast the site excavation verification of, respectively, to verify the reliability of the two methods.Based on the geologicaldata existing of Furen mountain tunnel, using hierarchical analysis method to establish a set of applicable to Furen mountain tunnel surge water inrush risk evaluation system and the tunnel different existence of piecewise Chung water inrush risk to make reasonable analysis and evaluation.Briefly describes the influence on the environment of the mountain tunnel Furen and corresponding treatment methods.Through the study of learning achieved the following results:(1)The length of Furen mountain tunnel is 13.107 km. Among them weak rich waterfront length 3.151 km, medium rich waterfront length 9.92 km, respectively accounting for tunnels with a total length of 24.1% and 75.9%. The theoretical prediction of the whole tunnel normal water inflow at about 29277.12m3/d, the maximum water inflow at about 141437.44m3/d.(2) Theoretical analysis and in-situ excavation reveal the Furen mountain tunnel water inflow prediction has certain reliability by groundwater runoff modulus method.(3) The furen mountain tunnel sections were evaluated for the prediction of water inrush risk. Evaluation results: three medium risk areas(III) and two weak risk zone(II) statistics based on the length, Furen mountain tunnel, a total length of 13.107 km, the moderate risk zone(III) 9920 m, accounted for 75%; weak risk zone(II) 3187 m, accounting for 25%; the whole tunnel risk in a controllable state.