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Tunnel monitoring system


Automated convergence and deformation measurement in tunnels

Design of an automated measurement system to assess convergence and deformation in tunnels.

The system includes a patented algorithm by Prof. Carlos Dinis da Gama (IST – Lisbon, Portugal) which measures convergence from the walls deformation, without interfering with the tunnel operation and providing real-time data.

The first system was installed in Rossio railway tunnel, owned by Refer, in 2007. This system accounted for more than 800 fiber optic sensors along 100 tunnel sections.


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