Deployment of a telescopic robot with curved beam, designed for tunnelling:
Repair of fire damage in the Euro Tunnel
With a total length of 50 km and an undersea section of 37 km under the English Channel, the Euro Tunnel is the longest undersea tunnel in the world. Opened in 1994, the tunnel offers a direct rail link between France and England through two single-track tunnels.
There was an accident on 11 September 2008. A fire broke out in one of the tunnels. Wannenwetsch GmbH, among others, was contracted to repair the fire damage. The tunnels were fully reopened on 9 February 2009 (partial opening previously).
Job Report – Factsheet
- Project: Euro-Tunnel Calais / Dover
- Contractor: Groupe Eurotunnel S.A
- Client: Doornbros Verhuur BV
- Type of operation: Repair of fire damage in the undersea tunnel
- Special feature: Use of a newly designed curved beam on a telescopic robot
- Equipment technology: Telescopic robot
- Unit: 1000 bar, 240 l/min
- Cutting: 6000 m² concrete cutting on curved tunnel ceiling, 3 cm thick
The curved shape of the tunnel normally only permits narrow cutting beams, which must make more frequent passes and then require more space for the cutting surface debris than standard compared with straight surfaces.
To avoid this effect, the technical division of Wannenwetsch GmbH developed a curved beam that offered considerable time savings compared with the conventional method, thanks to its standard 3 m width.