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Squeezing rock conditions at phyllite-slate zone in Golab water conveyance tunnel, Iran: A case study

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An Erratum to this article was published on 01 November 2017

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Abstract

Squeezing ground in tunneling is associated with large deformation of the tunnel face. In this study, squeezing characteristics of the ground and rock conditions in Golab water conveyance tunnel, Iran, are discussed and the classification of squeezing behavior around zones where the problems occurred is presented. The squeezing conditions were investigated using empirical and semi empirical methods. In the next step, creep convergence of the tunnel with Burger’s model was simulated by the numerical method. Numerical analysis showed that wall displacement (64.1 mm) of the Golab tunnel was more than allowable strain (1% of the tunnel diameter), therefore, it was found that squeezing phenomenon could exist, leading to the failure of the support system. Numerical analysis at the phyllite-slate zone also showed squeezing conditions due to the weakness of rock mass and high overburden that this situation cause failure in the segmental lining. In this research, failure in segmental lining in phyllite-slate zone verified the results of the numerical modeling.

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Change history

  • 16 December 2017

    Authors’ first and last names were interchanged in the original version of the article and they should be replaced as follows: Asghar Rahmati, Lohrasb Faramarzi, Mohammad Darbor.

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Acknowledgments

The authors express their thanks to the Imensazan Consultant Engineers Institute for providing facilities and access to the data.

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Authors and Affiliations

  1. Department of Mining Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran

    Rahmati Asghar, Faramarzi Lohrasb & Darbor Mohammad

Authors
  1. Rahmati Asghar
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  2. Faramarzi Lohrasb
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  3. Darbor Mohammad
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Corresponding author

Correspondence to Faramarzi Lohrasb.

Additional information

An erratum to this article is available at https://doi.org/10.1007/s11771-017-3686-3.

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Asghar, R., Lohrasb, F. & Mohammad, D. Squeezing rock conditions at phyllite-slate zone in Golab water conveyance tunnel, Iran: A case study. J. Cent. South Univ. 24, 2475–2485 (2017). https://doi.org/10.1007/s11771-017-3659-6

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  • DOI: https://doi.org/10.1007/s11771-017-3659-6

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