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Whispering underground

Luise-Kiesselbach-Tunnel, Munich

Although city tunnels reduce the overall traffic noise for their neighbourhood, it is still necessary to add noise abatement measures at their entry and exit points.

The Municipality of Munich therefore commissioned Forster Metallbau GmbH to supply and install noise barriers (highly absorbing noise panels) and the steel substructure for the entire tunnel, including all its entry and exit points.

The installation works along the 2.8 kilometres taken up by the construction site are comprehensive and exhaustive. "Since the start in November 2013 until its planned completion, nine to twelve workers need to be on site at any time. Some 50,000 square metres of aluminium panels are being fitted in the tunnel area," says Hannes Stangl, project manager, about the scope of the project.

The panels are highly absorbent, are placed upright and fixed by a concealed method. If damaged in an accident, they can be easily replaced. Part of the panelling can be removed by casement fasteners to facilitate maintenance access to the installations behind.

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