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.

FiberSensing
2007