Abstract
Thermal actions considered during the design of tunnel structures in the Czech Republic are not sufficiently defined by standards, therefore permanent monitoring system was designed and prepared for purpose of thermal and strain monitoring of tunnel linings. This system is installed into three tunnel structures, its design is adjusted to ensure its similarity in all the structures. Monitored spots of the system are situated in central and boundary segments and the system measures temperature profiles and strain in crown and wall of tunnel segments. Measurement should provide sufficient basis for statistical evaluation of temperature changes reached in tunnel linings during the extended period of time. Result of tunnel lining monitoring will be an adjusted design temperature profile for purpose of tunnel lining design optimization, which should lead to the reduction of final costs of newly constructed tunnels.
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