Theory Research Of Stress Field Displacement Field And Seepage Field And Study On Grouting Waterproofing Of High Water Pressure Tunnel

With the rapid development of underground engineering, groundwater is almost always accompanied by underground engineering, groundwater preventing problem has plagued engineering field. Underground work in the confined water, groundwater control is more complex, the problem becomes more and more prominent. In recent years, our country built a large number of mountain tunnel, cross river tunnel, mine tunnel and all kinds of underground engineering, the tunnel will most through various complicated geological tectonic units, through strata are more or less broken fault zone, rock veins invasion zone and other undesirable formation. These tunnels have most of the groundwater has a certain pressure. As a result of these strata rock crusher, the jointed and fractured, waterproof performance is good, when the tunnel construction, if not very good control of underground engineering the high pressure groundwater, will cause the water inrush, burst mud and other serious accidents, serious influence to construction personnel life safety, affect the safe operation of underground engineering. Therefore, in order to ensure the construction safety of tunnel, the tunnel construction encountered in the process of high pressure groundwater must be controlled and grooming.Based on the national technology research and development program of China (863Program)(project number:2007AA11Z134) as the basis, the theoretical research and analysis, numerical simulation, field test and field monitoring of the method of combining research, put forward water-rock interaction and fractured rock body seepage field, displacement field and stress field coupling a numerical model, in the three coupling field based on the research results of the proposed maximum gushing water in tunnel with high water pressure calculation formula, developed under high water pressure tunnel waterproof grouting scheme, and to the North Tianshan Mountain for railway tunnel as the basis, for different strata grouting technology was studied, using numerical simulation numerical simulation analysis of tunnel water pressure, discharge and excavation process of stress, displacement and water inflow changes, to verify the correctness of theoretical analysis, and to guide the actual project construction. Research results for the future of our country under the complex geological condition with high pressure tunnel, mine tunnel and underground engineering of city ground water treatment technology and construction etc and put forward new ideas, for the practical engineering with the practical significance of the theoretical basis, promoted the tunnel grouting technology basic theory and construction practice of progress, promoted tunnel scientific development, for the design and construction of underground projects played a great role in promoting. At the same time our important transport routes across the Yangtze River, the Yellow River and the Gulf of Bohai River and channel underwater tunnels as well as the mountain tunnels have important guiding significance. Research into construction method will provide China with high water pressure tunnel bad strata grouting construction to provide technical support, but also for our tunnel waterproof and drainage system on the basis of. This also is our country build highway tunnel, tunnel of high-speed railway and mining tunnel provides a reliable method of construction, eliminate groundwater influences on the tunnel, which can save a lot of construction cost, thus creating the social benefit, economic benefit and national defense construction significance would be great.