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Volume 44 Issue 8
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Abstract
References
WANG Hong-yu, HUANG Mao-song, TANG Zhen. Three-dimensional undrained stability analysis of circular tunnels based on combined mechanism of a translational block and a shear zone[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(8): 1376-1385. DOI: 10.11779/CJGE202208002
Citation: WANG Hong-yu, HUANG Mao-song, TANG Zhen. Three-dimensional undrained stability analysis of circular tunnels based on combined mechanism of a translational block and a shear zone[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(8): 1376-1385. DOI: 10.11779/CJGE202208002
shu

Three-dimensional undrained stability analysis of circular tunnels based on combined mechanism of a translational block and a shear zone

  • 1.

    Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

  • 2.

    College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China

  • 3.

    Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

  • 4.

    Powerlong Real Estate Holdings Limited, Shanghai 201101, China

More Information
  • Received Date: June 02, 2021
  • Available Online: September 22, 2022
    Graphical Abstract
    • Abstract
  • Three-dimensional tunnel face stability analysis in heterogeneous undrained clay is carried out by using the combined mechanism of a translational block and a shear zone. The stability factor of tunnels of the simple shear-rotational mechanism proposed by the previous study is corrected as the energy dissipation along the discontinuity surface is omitted. Through in-depth discussion on the block mechanism and shear flow mechanism, the gap between the upper-bounds from the existing mechanisms with the centrifugal test results and the solutions from the finite element method is clarified. The mechanism consisting of a translational cylindrical block and a toroidal shear zone is further proposed to significantly improve the upper-bound solutions from the existing analytical mechanisms when the tunnel cover to depth ratio is relatively large. The effectiveness of practical engineering evaluation methods is also discussed.
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    • References (24)
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