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Failure mechanism of large-diameter shield tunnels and its effects on ground surface settlements

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Abstract

A new technique for the analysis of the three-dimensional collapse failure mechanism and the ground surface settlements for the large-diameter shield tunnels were presented. The technique is based on a velocity field model using more different truncated solid conical blocks to clarify the multiblock failure mechanism. Furthermore, the shape of blocks between the failure surface and the tunnel face was considered as an entire circle, and the supporting pressure was assumed as non-uniform distribution on the tunnel face and increased with the tunnel embedded depth. The ground surface settlements and failure mechanism above large-diameter shield tunnels were also investigated under different supporting pressures by the finite difference method.

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Authors and Affiliations

  1. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, 100083, China

    Yu-you Yang  (杨宇友) & Hong-an Li  (李宏安)

Authors
  1. Yu-you Yang  (杨宇友)
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  2. Hong-an Li  (李宏安)
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Corresponding author

Correspondence to Yu-you Yang  (杨宇友).

Additional information

Foundation item: Project(41202220) supported by the National Natural Science Foundation of China; Project(2011YYL034) supported by the Fundamental Research Funds for the Central Universities, China

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Yang, Yy., Li, Ha. Failure mechanism of large-diameter shield tunnels and its effects on ground surface settlements. J. Cent. South Univ. 19, 2958–2965 (2012). https://doi.org/10.1007/s11771-012-1364-z

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  • DOI: https://doi.org/10.1007/s11771-012-1364-z

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