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Effect of tunnel fire: Analysis and remedial measures

  • Choubey, Bishwajeet (CCE R&D South, Defence (R&D) Organization) ;
  • Dutta, Sekhar C. (Department of Civil Engineering, IIT (ISM)) ;
  • Kumar, Virendra (Department of Civil Engineering, NIT Jamshedpur)
  • Received : 2021.05.23
  • Accepted : 2021.10.14
  • Published : 2021.12.25

Abstract

The paper aims at improving the understanding and mitigating the effects of tunnel fires that may breakout due to the burning fuel and/or explosion within the tunnel. This study particularly focuses on the behavior of the commonly used horse shoe geometry of tunnel systems. The problem has been obtained using an adequate well-established program incorporating the Lagrangian approach. A transient-thermo-coupled static structural analysis is carried out. The effects of radiation and convection to the outer walls of the tunnel is studied. The paper also presents the impact of the hazard on the structural integrity of the tunnel. A methodology is proposed to study the tunnel fire using a model which uses equivalent steel sheet to represent the presence of reinforcements to improve the computational efficiency with adequate validation. A parametric study has been carried out and the effect of suitable lining property for mitigating the fire hazard is arrived at. Detailed analysis is done for the threshold limits of the properties of the lining material to check if it is acceptable in all aspects for the integrity of the tunnel. The study may prove useful for developing insights for ensuring tunnel fire safety. To conduct such studies experimentally are tremendously costly but are required to gain confidence. But, scaled models, as well as loading and testing conditions, cannot be studied by many trials experimentally as the cost will shoot up sharply. In this context, the results obtained from such computational studies with a feasible variation of various combinations of parameters may act as a set of guidelines to freeze the adequate combination of various parameters to conduct one or two costly experiments for confidence building.

Keywords

References

  1. AUTODYN Theory Manual (2005), Revision 4, Concord, Century Dynamics, CA, USA. http://www.oalib.com/references/8522641.
  2. Baghdadi, M., Dimia, M.S., Guenfoud, M. and Bouchair, A. (2021), "An experimental and numerical analysis of concrete walls exposed to fire", Struct. Eng. Mech., 77(6), 819-830. http://doi.org/10.12989/sem.2021.77.6.819.
  3. Borrvall, T. and Riedel, W. (2011), The RHT concrete model in LS-DYNA", 8th European LS-DYNA Users Conference, Strasbourg.
  4. Breunese, A.J., Both, C. and Wolsink G.M. (2008), "2008-Efectis-R0695: Fire testing procedure for concrete tunnel linings", Efectis-R0695, 1-25, Nederland.
  5. Carvel, R.O., Beard, A.N. and Jowitt, P.W. (2005), "Fire spread between vehicles in tunnels: Effects of tunnel size, longitudinal ventilation and vehicle spacing", Fire Technol., 41(4), 271-304. http://doi.org/10.1007/s10694-005-4050-y.
  6. Carvel, R.O., Beard, A.N., Jowitt, P.W. and Drysdale, D.D. (2005), "Fire size and fire spread in tunnels with longitudinal ventilation systems", J. Fire Sci., 23(6), 485-518. http://doi.org/10.1177/0734904105052578.
  7. Duddeck, H. (1988), "Guidelines for the design of tunnels", Tunnel. Underg. Space Technol., 3(3) 237-249. https://doi.org/10.1016/0886-7798(88)90050-8.
  8. El-Mahdy, O.O., Hamdy, G.A. and Hisham, M. (2021), "Efficiency of insulation layers in fire protection of FRP-confined RC columns-numerical study", Struct. Eng. Mech., 77(5), 673-689. http://doi.org/10.12989/sem.2021.77.5.673.
  9. EN 1991-1-2 (2002), Eurocode 1: Actions on Structures-Part 1-2: General Actions-Actions on Structures Exposed to Fire, Brussels.
  10. EN 1992-1-2 (2004), Eurocode 2: Design of Concrete Structures-Part 1-2: General Rules-Structural Fire Design, Brussels.
  11. Eskesen, S.D., Tengborg, P., Kampmann, J. and Veicherts, T.H. (2004), "Guidelines for tunnelling risk management: international tunnelling association, working group No. 2", Tunnel. Underg. Space Technol., 19(3), 217-237. https://doi.org/10.1016/j.tust.2004.01.001.
  12. Gehandler, J. (2015), "Road tunnel fire safety and risk: A review", Fire Sci. Rev., 4(1), 1-27. https://doi.org/10.1186/s40038-015-0006-6.
  13. Grant, G.B., Jagger, S.F. and Lea, C.J. (1998), "Fires in tunnels", Philos. Tran. Roy. Soc. London Ser. A: Math. Phys. Eng. Sci., 356(1748), 2873-2906. https://doi.org/10.1098/rsta.1998.0302.
  14. Ingason, H., Li, Y.Z. and Lonnermark. A. (2015), "Runehamar tunnel fire tests", Fire Saf. J., 71, 134-149. http://doi.org/10.1016/j.firesaf.2014.11.015.
  15. Instruction Technique (2000), Annexee a La Circulaire Interministerielle No 2000-63 Du 25 Aout 2000 Relative a La Securite Dans Les Tunnels Du Reseau Routier Francais, Paris.
  16. International Organization for Standardization (ISO) (1999), ISO 834: Fire-Resistance Tests-Elements of Building Construction, 1st Edition.
  17. Ko, Y.J. (2011), "A study of the heat release rate of tunnel fires and the interaction between suppression and longitudinal air flows in tunnels", Carleton University, Canada.
  18. Kodur, V.K.R. (2000), "Spalling in high strength concrete exposed to fire: Concerns, causes, critical parameters and cures", Adv. Technol. Struct. Eng., 103, 1-9. http://doi.org/10.1061/40492(2000)180.
  19. Larsson, K. (2006) "Fires in tunnels and their effect on rock- A review", Research Report, 3-69.
  20. Madhusudana, C.V. and Madhusudana, C.V. (1996), Thermal Contact Conductance, Vol. 79, Springer-Verlag, New York.
  21. Maraveas, C. and Vrakas, A.A. (2014), "Design of concrete tunnel linings for fire safety", Struct. Eng. Int., 24(3), 319-329. http://doi.org/10.2749/101686614X13830790993041.
  22. Marina, G., Antonov, S. and Nedryshkin, O. (2016), "Research features of tunnel linings with innovations fireproof panels", Procedia Eng., 165, 1651-1657. https://doi.org/10.1016/j.proeng.2016.11.906.
  23. Parsonage, N.G. (1966), Thermal Conductivity, Elsevier.
  24. Society for Testing, American (2000), ASTM E119: Standard Test Methods for Fire Tests of Building Construction and Materials, United States.
  25. Tarada, F. and King, M. (2009), "Structural fire protection of railway tunnels", Railway Engineering Conference, University of Westminster, UK, June.
  26. Wu, B. and Li, Y.H. (2009), "Experimental study on fire performance of axially-restrained NSC and HSC columns", Struct. Eng. Mech., 32(5), 635-648. https://doi.org/10.12989/sem.2009.32.5.635.
  27. Wu, J. and Shen, F. (2016), "Experimental study on the effects of ventilation on smoke movement in tunnel fires", Int. J. Ventil., 15(1), 94-103. https://doi.org/10.1080/14733315.2016.1173295.
  28. Zhang, H. and Zhao, Y. (2020) "Study on underground utility tunnel fire characteristics under sealing and ventilation conditions", Adv. Civil Eng., 2020, Article ID 9128704. https://doi.org/10.1155/2020/9128704.