›› 2013, Vol. 34 ›› Issue (1): 299-304.

• Numerical Analysis • Previous Articles    

Application of FLAC3D to seepage field of Qingdao metro

HUA Fu-cai1, 2   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Beijing Urban Engineering Design & Research Institute Co., Ltd, 100037, China
  • Received:2011-10-13 Online:2013-01-10 Published:2013-01-10

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Abstract: Firstly, based on considering the theoretical solution of liner and grouting circle, the calculation and automatic drawing program has been developed with MATLAB software; and the relationships among water inflow, external water pressure and water head, tunnel radius, rock permeability, lining permeability are researched. Secondly, through the comparison of the numerical result and theoretical solution based on the FLAC3D, the correctness of application of numerical simulation methods to the tunnel seepage field are verified. On this basis, combined with the typical range of Qingdao metro, the seepage fields in the excavation stage and operation period are studied; and the relationships between water inflow and external water pressure of grouting circle are researched under different grouting circle thickness and grouting parameters. The results show that the application of grouting circle to the tunnel to reduce the water inflow is feasible; and the greater the grouting circle thickness and the smaller the grouting circle permeability, the less the tunnel water inflow; but the changing law of the external water pressure is on the contrary. The obtained results play an important role in designing the liner and the preliminary definition of the grouting thickness.

Key words: seepage field, theoretical analysis, numerical analysis, water inflow, external water pressure

CLC Number: 

  • U 451
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