Hydromechanical postclosure behavior of a deep tunnel taking into account a simplified life cycle

N. Dufour, H. Wong, F. Deleruyelle, C. J. Leo

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    This paper addresses the hydromechanical postclosure behavior of an underground long cylindrical deep tunnel drilled into a massif (host medium) and backfilled at the end of its service life. It is concerned with the development of quasi-analytical Laplace transform solutions based on a simplified life cycle of the tunnel, idealized in four stages: (1) excavation, (2) pore-pressure dissipation before lining installation, (3) lining installation and tunnel exploitation, and (4) postclosure. The solutions proposed in this paper therefore extend the previous work of the authors, in this case by explicitly taking into consideration the excavation, waiting for lining installation, and tunnel exploitation stages of the life cycle. Results from a parametric study are also presented to highlight the hydromechanical responses of the tunnel over periods of its life cycle. The accuracy and correctness of the solutions from a finite-element model have been verified with the quasi-analytical results. The present solutions will be used later for benchmarking finite-element–based solutions currently under development, taking into account more complex material behaviors.
    Original languageEnglish
    Pages (from-to)549-559
    Number of pages11
    JournalInternational Journal of Geomechanics
    Volume12
    Issue number5
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Laplace transformation
    • analytical techniques
    • elasticity
    • fluid mechanics
    • life cycles
    • mine closures
    • tunnels

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