Germany

Restoring Safety of the Ventilation Systems in the Fellbach Road Tunnel

In Fellbach, through traffic has been conducted through a road tunnel since 1997 to relieve the downtown area. There are 4 rows of jet fans each possessing 6 aggregates distributed throughout the tunnel in order to provide ventilation. These fans are switched on and off depending on the wind direction and the CO impact so that the fumes caused by traffic are removed via the tunnel entrances.

In addition, in the eastern part of the structure there are 2 axial fans, which can remove dangerous gases from the tunnel via 2 vertical stacks (Fig. 1) in the event of fire or an increased CO2 load. In...

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