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Volume 37 Issue 1
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MIU Lin-chang, WANG Zheng-xing, SHI Wen-bo. Theoretical and numerical simulations of face stability around shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
Citation: MIU Lin-chang, WANG Zheng-xing, SHI Wen-bo. Theoretical and numerical simulations of face stability around shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 98-104. DOI: 10.11779/CJGE201501011
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Theoretical and numerical simulations of face stability around shield tunnels in sand

  • 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2. Management Center of City Construction Projects, Nantong 226153, China

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  • Received Date: April 01, 2014
  • Published Date: January 19, 2015
    Graphical Abstract
    • Abstract
  • The soil density is a key factor for the studies on the limit support pressure and the face stability operation during tunneling construction. Based on the Kirsch’s laboratory model tests, the PFC2D is employed to investigate the influence of soil density on the limit support pressure, residual support pressure and void ratio in the heading face. The failure mechanisms of the excavation face are investigated at the mesoscopic level. The failure behavior and arrange of the face stability of the shield tunnels in sand are analyzed. The improved wedge model is proposed as a method for calculating the limit support pressure of face. It may provide certain guidance to the stabilization of excavation face of shield tunnels.
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    • References (22)
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