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LIOS TECHNOLOGY
Mont Blanc Tunnel

Mont Blanc Tunnel

The Mont Blanc tunnel is a road tunnel in the Alps connecting Chamonix of France and Courmayeur of Italy, beneath the Mont Blanc massif. At 11.6 km, the tunnel was the longest road tunnel in the world at the time of its completion in 1965.

Application
The Mont Blanc Tunnel between France and Italy experienced a widely publicized fire disaster in March 1999, when a truck travelling through the 11,6 km long tunnel burst into flames 6 km into the structure. The resulting fire burned for 52 hours and ended 41 lives. Damage to the tunnel was so severe that it took almost three years to complete the renovation and modernisation of the entire tunnel infrastructure. For the consortium responsible for re-building the tunnel, compromise was not an option: they had to employ the most modern, effective and reliable fire detection technology available to protect the tunnel. They chose LIOS LHD technology.

System configuration:

  • 8 OTS-100 LHD controllers linked via gateways and ODBC-Server.
  • Fully redundant layout.
  • 384 alarm and event zones.
  • Fire localisation precision 6 m.
  • Almost 14 km of sensor cable, type HDPE 8 mm.
  • Centralized visualisation in the French and Italian control rooms.
  • Ventilation, traffic signal and barrier are controlled by the LHD system directly.

Commissioned
End of 2001

Miscellaneous
In case of fire the LHD system quickly provides precise information about the location of the fire and activates procedures in the ventilation system to slow down the natural tunnel wind at the point of the fire and extract smoke efficiently.

 

DE.TECT Fire Detection Information

DE.TECT - Fibre Optic Linear Heat Detector for Fire Detection

LIOS DE.TECT is the state of the art fire detection system to provide optimum safety for fire detection in tunnels and other special hazard areas.

 

DE.TECT Linear Heat Detection Brochure

» LIOS sets the benchmark in reliability and track record