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Simplified design of rock cavern concrete lining to resist shock loading

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Abstract

A simplified method was proposed for the design of concrete lining in underground rock cavern/tunnel against shock loading. The loading may result from the detonation of explosives on ground surface or ground penetration projectiles exploding adjacent to the cavern/tunnel. The resulting problem necessitates the solution of the dynamics of a beam loaded by a transient pressure uniformly distributed over the span. According to mechanical characteristics of the system with rock bolt and shotcrete, a dynamic support design method based on equivalent single degree of freedom (SDOF) was put forward. The SDOF method was applied to obtaining the maximum displacement at the mid-span of the beam, which is often the controlling factor in the blast-resistant design. In the formulation of the problem, the proposed method combines the phenomena of spalling and structural dynamics theory. An example is provided to demonstrate the applicability of this simplified method.

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Authors and Affiliations

  1. Butler Partners Pty Ltd, Queensland, 4006, Australia

    P. J. Zhao

  2. Protective Technology Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    T. S. Lok

  3. School of Resources and Safety Engineering, Central South University, Changsha, 410083, China

    Zhi-qiang Yin  (殷志强) & Zi-long Zhou  (周子龙)

Authors
  1. P. J. Zhao
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  2. T. S. Lok
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  3. Zhi-qiang Yin  (殷志强)
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  4. Zi-long Zhou  (周子龙)
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Corresponding author

Correspondence to P. J. Zhao.

Additional information

Foundation item: Projects(50934006, 50904079) supported by the National Natural Science Foundation of China; Project(2010CB732004) supported by the National Basic Research Program of China

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Zhao, P.J., Lok, T.S., Yin, Zq. et al. Simplified design of rock cavern concrete lining to resist shock loading. J. Cent. South Univ. Technol. 17, 1087–1094 (2010). https://doi.org/10.1007/s11771-010-0601-6

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  • DOI: https://doi.org/10.1007/s11771-010-0601-6

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