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Strain measurements in precast concrete segments of a shield-driven tunnel
Schotte, K.; De Backer, H.; Van Bogaert, P. (2011). Strain measurements in precast concrete segments of a shield-driven tunnel, in: Sruma, V. (Ed.) FIB Symposium Prague 2011. Concrete Engineering For Excellence and Efficiency. pp. 587-590
In: Sruma, V. (Ed.) (2011). FIB Symposium Prague 2011. Concrete Engineering For Excellence and Efficiency. Czech Concrete Society [CBS]: Prague. ISBN 978-80-87158-29-6. , meer
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Documenttype: Congresbijdrage
Author keywords
    Tunnel; Strain monitoring; Precast concrete segments
Auteurs  Top 
  • Schotte, K., meer
  • De Backer, H., meer
  • Van Bogaert, P., meer
Abstract
    Although the Liefkenshoek Rail Link in the Port of Antwerp consists of a new double track railway section of 16 km length, the principal part is the undertunnelling of the River Scheldt and the Port Canal. In order to construct this undercrossing, two single-track tunnels with an individual length of 6,100 m are being built using the mixshield method. At specified cross-sections of the tunnel lining each segment is equipped with strain gauges attached to the reinforcement bars and inner concrete surface. Some critical sections are to be considered, such as the one located below the Port Canal, taking into account the extremely shallow ground cover of merely 1.1 m. The obtained measurement data will allow assessing the real-time behaviour of the concrete segments under numerous loading conditions during construction of the tunnel lining. Results will show that despite the rough conditions on site, strain monitoring proves an important aid to evaluate both the applied construction materials and the theoretical models for tunnel design.
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