Acquista:
Dealing with time-dependent phenomena during tunnel
excavation and management is a complex topic that engineers and
geologists need to face worldwide. Threats to tunnel stability are posed
by the swelling/creep behaviour of geomaterials. These phenomena occur
during the construction of the tunnel but can evolve for a long period
after tunnel operation and can jeopardize the tunnel integrity with
time. Although the topic of time-dependent behaviour has been repeatedly
addressed in the literature, less attention has been paid to
methodologies to deal with it during the serviceability of tunnels.
Therefore, appropriate and reliable methods are needed to analyse and
predict tunnel behaviour during their service life and/or refurbishment
processes. This paper will focus on existing tunnels subjected to the
time-dependent behaviour of the surrounding ground to identify the
methodological approach for designing maintenance works and/or managing
the associated risks. Examples from the Authors’ experience are used to
support the discussion.
Keywords: Tunnelling, Swelling, Creep, Numerical analysis, Time-dependent behaviour.
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