NON-DARCY FLOW MODEL AND NUMERICAL SIMULATION FOR PREDICTING WATER INFLOW IN DEEP TUNNEL
WANG Yuan1，2，QIN Feng1，2，XIA Zhihao1，2，NI Xiaodong1，2
(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering，Hohai University，Nanjing，Jiangsu 210098，China；2. Institute of Tunnel and Metro Engineering，College of Civil and Transportation Engineering，
Hohai University，Nanjing，Jiangsu 210098，China)
Abstract：The constitutive model of non-Darcy flow was established based on the laboratory data of high velocity non-Darcy flow through a single smooth parallel-plate fracture，and the determination method of non-Darcy flow influence coefficient was introduced. Generalized constitutive equation for both Darcy and non-Darcy flows was developed. The finite element method based on the generalized Darcy and non-Darcy flows constitutive equation was presented；and the basic iteration steps of non-Darcy flow analysis were performed according to conjugate gradient iterative method. Finally，the above theory and method were applied to the prediction of water inflow in a tunnel. By comparison of the two different calculation results for Darcy and non-Darcy flow theories，the necessity of adopting non-Darcy flow theory was explained. It is also found that the aperture of a big fracture and location of cross point of multiple faults have considerable influences on water inflow in the tunnel.
王 媛1，2，秦 峰1，2，夏志皓1，2，倪小东1，2. 深埋隧洞涌水预测非达西流模型及数值模拟[J]. 岩石力学与工程学报, 2012, 31(9): 1862-1868.
WANG Yuan1，2，QIN Feng1，2，XIA Zhihao1，2，NI Xiaodong1，2. NON-DARCY FLOW MODEL AND NUMERICAL SIMULATION FOR PREDICTING WATER INFLOW IN DEEP TUNNEL. , 2012, 31(9): 1862-1868.
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2012, Vol. 31 
