Study on Prediction Methods and Its Influence Factors of Water Inflow Into Tunnels

Water into tunnels is an important reference index for design of tunnel waterproofing and drainage systems,because it not only relates to seepage forces acting on the tunnel lining,but also relates to the safety of the ecological environment.Based on the summary of 3 main prediction methods of water inflow into tunnels: theoretical analysis method,empirical formula method and numerical analysis method,influence of many factors on water inflow into tunnels is discussed,which includes permeability of surrounding rock,cavern size,water table height,permeability of lining,permeability and thickness of grouting circle, thickness of the aquifer,and cavern shapes,et al.Differences among prediction methods of water inflow into tunnels are comparatively analyzed.The limitations and conditions for application of these methods,especially for various theories analytical methods,are highlighted.The research results can definitely provide reference and technical support for prediction of water inflow into tunnels and its control measures.