Tunnels are important traffic routes. These also need to be maintained and renovated if necessary.

Major players, medium-sized companies and small businesses in the field of tunnel construction / tunnel renovation from Germany, Austria and Switzerland work hand in hand. During the renovation of the Vorarlberg tunnel, the companies needed effective dust control. This was a requirement of the authorities and had to be complied with.

Due to time pressure, two asphalt milling machines were used simultaneously to remove the concrete surface. The amount of dust was enormous. A hydro shield to create large water curtains put the entire tunnel under water and was therefore not a solution.

In order to contain the dust and ensure work safety in the tunnel, they relied on the effective, reliable water misting system from NEBOLEX Umwelttechnik GmbH. With our systems, the water input can be precisely adjusted by means of a control system and is in the per mille range.

After a test set-up, which achieved the desired effect, the system was permanently installed. Individual spray fog bars with integrated mist heads were installed as water locks on the ceilings throughout the tunnel. These barriers do not allow dust to escape. Our 20 bar system atomizes the water so finely that even small particles are bound. The volatile dust absorbs moisture, becomes heavy, sinks to the ground and moistens the traffic routes. This means that no additional dust is stirred up when the vehicle is driven over.