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Volume 45 Issue S2
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YU Yongjie, ZHANG Lin, SONG Zeren, LANG Xiaoming, GAO Peipei, SU Ya. Effects of excavation and support schemes on stability of surrounding rock of tunnels[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 284-287. DOI: 10.11779/CJGE2023S20045
Citation: YU Yongjie, ZHANG Lin, SONG Zeren, LANG Xiaoming, GAO Peipei, SU Ya. Effects of excavation and support schemes on stability of surrounding rock of tunnels[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 284-287. DOI: 10.11779/CJGE2023S20045
shu

Effects of excavation and support schemes on stability of surrounding rock of tunnels

  • 1.

    Zhoushan Transportation Engineering Management Center, Zhoushan 316100, China

  • 2.

    Zhejiang Yong-Zhou Phase I Expressway Company, Zhoushan 316100, China

  • 3.

    Zhoushan Bridge Construction Management Center, Zhoushan 316100, China

  • 4.

    Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China

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  • Received Date: November 29, 2023
  • Available Online: April 19, 2024
    Graphical Abstract
    • Abstract
  • The impact of excavation and construction methods on the stability of tunnels with general quality rock is studied. The construction plans are developed, taking into account two factors during tunnel construction: the installation of support and the time of support installation. Based on the Hoek-Brown criteria, numerical simulations of tunnel construction plans are performed using the FLAC3D to investigate the stability of the surrounding rock of tunnels based on the convergence constraint principle. The results indicate that the factor of whether or not support is installed has a significant impact on the shape and characteristics of the longitudinal characteristic curve of the tunnels. Under the condition of considering no support installation, the differences in the shape and characteristics of the longitudinal characteristic curve under different excavation conditions are not significant. Considering the time of support installation and whether or not support is installed does not have a significant impact on the safety factor of the surrounding rock.
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    • References (5)
  • [1]
    CARRANZA-TORRES C, FAIRHURST C. Application of the convergence-confinement method of tunnel design to rock masses that satisfy the Hoek-Brown failure criterion[J]. Tunnelling and Underground Space Technology, 2000, 15(2): 187-213. doi: 10.1016/S0886-7798(00)00046-8
    [2]
    VLACHOPOULOS N, DIEDERICHS M S. Improved longitudinal displacement profiles for convergence confinement analysis of deep tunnels[J]. Rock Mechanics and Rock Engineering, 2009, 42(2): 131-146 doi: 10.1007/s00603-009-0176-4
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    ALEJANO L R, RODRIGUEZ-DONO A, VEIGA M. Plastic radii and longitudinal deformation profiles of tunnels excavated in strain-softening rock masses[J]. Tunnelling and Underground Space Technology, 2012, 30: 169-182. doi: 10.1016/j.tust.2012.02.017
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    铁路隧道设计规范: TB10003—2016[S]. 北京: 中国铁道出版社, 2016.

    Code for Design of Railway Tunnel: TB10003—2016[S]. Beijing: China Railway Publishing House, 2016. (in Chinese)
    [5]
    HOEK E, CARRANZA-TORRES C, CORKUM B. Hoek- Brown failure criterion: 2002 edition[C]//Proceedings of the 5th North American Rock Mechanics Symposium and 17th Tunnelling Association of Canada Conference. Toronto, 2002: 267-273.
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