The Research On Geological Characteristics And Water Inrush Prevention In Construction Of Yesanguan Tunnel

With the acceleration of socialist modernization, the state input in infrastructure construction is increasing. Countries over the past decade to develop the railway industry, have opened a lot of high-speed railway to run. For our country has a lot of mountain areas, tunneling is inevitable. To protect personnel and property, before the construction of the tunnel should understand the local geological features, but also on early exploration well in front of the tunnel excavation, to prevent the occurrence of disasters, particularly water inrush. To field investigation and testing as a means of Yesanguan geological characteristics of the construction of the tunnel has been systematically studied, specifically the formation of major geological disasters and geological conditions, as the basis of the advanced prediction method. The paper carried out the research on hazard prevention programs of large areas of the cavern and suddenly water disaster in karst area.This topic first yesanguan geographic region do the scene where the research conducted on the local topography of the survey and investigation, combined with already collected information about the geological characteristics of the study area, a major study of geological Yesanguan tunnel environmental conditions, construction of geological features, geological characteristics, hydrogeological features, karst features, characteristics of geological disasters, geological prediction and so on. Through research, clear Yesanguan tunnel there karst, karst water, mud sudden inrush of water, karst collapse and so on. There may be lots of major geological disasters including the experience of large river system, development of major weakness, rich water, good water conductivity fault, there are significant geophysical anomaly segment. Possible large-scale conflict Water and Mud, and may trigger a major environmental disaster for the tunnel construction site geologic hazard section.Through the tunnel ahead of the previous forecast and comparison of various methods and techniques in the study area of specialty, choose to use the TSP tunnel advance warning system for excavation in the area of exploration before the forecast. In the study of the TSP's related works, on-site construction technology essentials, after data processing and data interpretation, the use of the equipment in the Yichang-Wanzhou Railway yesanguan tunnel work site. Immediately after making forecasts on the tunnel excavation, the results directly verify the accuracy of forecasting TSP, with proven results to constantly modify the TSP data processing methods and steps and typical disease characteristics. Through amendments to the region to predict the use of TSP, and then verify. By using this method from unknown to known, and then to fix the known unknown, making the technology more and more accurate forecasting results, the more practical method to achieve the desired results. At the same time, combined with the actual geological conditions in the area and past the tunnel conditions of water inrush disasters desire for the establishment of a sudden the water hazard early warning system to improve production efficiency and better protection of life and property.According to the practice and the experiment, the article proposed the karst tunnel large-scale dissolves the cavity and wells up the water disaster to prevent and control the processing plan and the measure suddenly, also has provided the technical support for the wild three pass tunnel construction, also gained in the experience for the next similar tunnel construction.