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Volume 40 Issue 3
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LI Jiao-yang, LIU Wei, ZOU Jin-jie, ZHAO Yu, GONG Xiao-nan. Large-scale model tests on face instability of shallow shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 562-567. DOI: 10.11779/CJGE201803022
Citation: LI Jiao-yang, LIU Wei, ZOU Jin-jie, ZHAO Yu, GONG Xiao-nan. Large-scale model tests on face instability of shallow shield tunnels in sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 562-567. DOI: 10.11779/CJGE201803022
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Large-scale model tests on face instability of shallow shield tunnels in sand

  • 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
    2. School of Urban Rail Transportation, Soochow University, Suzhou 215131, China;
    3. Power China Huadong Engineering Corporation, Hangzhou 310014, China;
    4. Institute of Disaster Prevention Engineering, Zhejiang University, Hangzhou 310058, China

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  • Received Date: September 06, 2016
  • Published Date: March 24, 2018
    Graphical Abstract
    • Abstract
  • The failure of tunnel face will occur if the support pressure is insufficient in tunneling. Large-scale model tests on the face stability are conducted for shallow shield tunnels. The collapse of the tunnel face is studied under different velocities of the panel. At the same time, the support pressure and surface deformation are monitored, and the three development stages of the support pressure and surface deformation are discovered. Meanwhile, the digital image correlation is used for the real-time observation and the technology of particle image velocity is further used to deal with the images, thus deriving the incremental displacements of instability soils. It is found that the variation rules of increment displacements are in correspondence with the three development stages of the support pressure and surface deformation.
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    • References (24)
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