JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2013, Vol. 30 ›› Issue (10): 77-80.

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Research on Dewatering Scheme for the South Route Project of a River-crossing Tunnel

WU Rui1, LIU Wen-yuan1, WANG Yao-zhong2, WU Man3, SHEN Fei-jun2   

  1. 1.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
    2.West-to-East Gas Transfer Pipeline Company of CNPC, Wuhan 430074, China;
    3.College ofHydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
  • Received:2012-10-26 Revised:2013-10-16 Online:2013-10-15 Published:2013-10-16

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Abstract: This research is carried out with the tunnel across Yangtze river in the south-bank at Weisan road in Nanjing as the background. In the light of the engineering geological and hydrogeological conditions in the site area, and with reference to experiences in similar projects in Nanjing, the radius of area affected by the dewatering and the comprehensive permeability coefficient of the site area were determined. On this basis, the calculation and design of dewatering for the foundation pit were carried out, and the applications of dewatering wells and buck wells in foundation pit dewatering were introduced. Furthermore, a numerical model of groundwater seepage was established to simulate and validate the dewatering effect for confined aquifer in the foundation pit by using 3-D finite difference method. The simulation results and practice both show that the dewatering scheme is reasonable and feasible.

Key words: deep foundation pit, confined aquifer, dewatering effect, design, numerical model of groundwater seepage, 3-D finite difference method

CLC Number: 

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