Hydromechanical Postclosure Behavior of a Deep Tunnel Taking into Account a Simplified Life Cycle
Publication: International Journal of Geomechanics
Volume 12, Issue 5
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.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 12 • Issue 5 • October 2012
Pages: 549 - 559
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 4, 2010
Accepted: Mar 4, 2011
Published online: Mar 7, 2011
Published in print: Oct 1, 2012
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