Water Inrush Early Warning Analysis Platform And Treatment Measures Of A Water Rich Fault Tunnel

The thsis takes the Gaoloushan tunnel of Wujiu Expressway as the research background.Due to the complex geological structure of the tunnel site,the development of fault fracture zones,the rock mass is broken,the surface gullies are vertical and horizontal,and the groundwater content is abundant due to surface precipitation and bedrock fissure water.Through the water-rich fault fracture zone and fault zone,there may be a danger of water inrush disaster.FLAC3D numerical simulations were carried out on seven factors affecting tunnel stability and water inflow under the formation conditions of water-rich fault fracture zone,and their sensitivity to tunnel water inflow and stability was analyzed.The research on the treatment of water inrush by the treatment measures such as drainage,blockage and the combination of drainage and blockage is simulated,and the treatment measures under the corresponding water inrush level are proposed.Through engineering cases and on-site investigations,the tunnel water inrush risk evaluation index system was constructed,and then the risk level evaluation method was established.The control measures and evaluation methods were used to realize the early warning and forecast of water inrush and the development of the treatment platform through computer language.Specific research results as follows:(1)Based on the FLAC3D finite difference method and the principle of fluid-solid coupling analysis,the tunnel depth H,groundwater height h,surrounding rock grade S,lateral pressure coefficient condition K0,fault width w,relative distance between fault and tunnel d/D,fault and horizontal plane are studied.Seven factors such as the included angle θ affect the stability of tunnel surrounding rock and the amount of water influx,and the related sensitivities are analyzed.The level of surrounding rock has the greatest sensitivity to its stability and water inflow,and the buried depth is the smallest..(2)Based on the analysis of tunnel stability and water gushing based on 7 risk factors,under the most dangerous working conditions of water-rich fault tunnels,FLAC3D is used to carry out numerical experiments on treatment measures such as water diversion tunnel drainage,grouting and water blocking,and the combination of drainage and blockage.Different grades are proposed.Gushing water treatment measures.(3)Based on the analysis of tunnel stability and water gushing based on 7 risk factors,under the most dangerous working conditions of the combination of various influencing factors of the water-rich fault tunnel,numerical tests of treatment measures such as water diversion tunnel drainage,grouting and water blocking,and combination of drainage and blockage were carried out through FLAC3D.Comparative analysis puts forward water gushing control measures at corresponding levels.(4)The water inrush hazard evaluation method and different levels of water inrush control measures have been developed through the HTML+CSS computer programming language to realize the development of a water inrush risk warning and risk platform,and the whole line and on-site predictions of the Gaoloushan tunnel of Wujiu Expressway have been carried out,and similar engineering cases The engineering analogy analysis was carried out to verify the high reliability of the platform,which is of positive significance for engineering guidance.