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Roof collapse of shallow tunnels with limit analysis method

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Abstract

A new failure mechanism is proposed to analyze the roof collapse based on nonlinear failure criterion. Limit analysis approach and variational principle are used to obtain analytical findings concerning the stability of potential roof. Then, parametric study is carried out to derive the change rule of corresponding parameters on the influence of collapsing shape, which is of paramount engineering significance to instruct the tunnel excavations. In comparison with existing results, the findings show agreement and validity of the proposed method. The actual collapse in certain shallow tunnels is well in accordance with the proposed failure mechanism.

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Xiao-li Yang  (杨小礼) & Ze-xiang Long  (龙泽祥)

Authors
  1. Xiao-li Yang  (杨小礼)
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  2. Ze-xiang Long  (龙泽祥)
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Correspondence to Xiao-li Yang  (杨小礼).

Additional information

Foundation item: Project(2013CB036004) supported by the National Basic Research Program of China; Projects(51178468, 51378510) supported by the National Natural Science Foundation of China

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Yang, Xl., Long, Zx. Roof collapse of shallow tunnels with limit analysis method. J. Cent. South Univ. 22, 1929–1936 (2015). https://doi.org/10.1007/s11771-015-2712-6

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  • DOI: https://doi.org/10.1007/s11771-015-2712-6

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