References

Bosruck Tunnel, Bosruck, Austria

One of the most important connections to South East Europe, the 5.5km long Bosruck Tunnel passes through the Ennstal Alps, connecting Upper Austria with Styria. The original, two-way traffic tunnel has been renovated and a second, new tunnel built alongside. Now part of the A9 Pyhrn motorway, it is used by around 18,000 vehicles each day. 

This impressive engineering feat is announced by new portal structures at both ends of the tunnel, to a competition-winning design by architect Peter Riepl. The highly architectonic approach taken is unusual for projects of this kind, suggesting a new building typology in celebration of transport infrastructure. But precedents can be found with the architectural treatments of 19th century railway tunnel entrances.

Theatrical Screens

At Bosruck, the architecture is thoroughly modern and the design strategy almost theatrical. A series of screens – made up of perforated brass cassettes, profiled and arranged to reflect the verticality of the surroundings – partially conceal buildings and equipment essential to the tunnels operation and safety. They impose a visual order and consistency for these disparate elements but also offer transparency and airiness, symbolic of the now barrier-free connection between the two federal provinces. The rhythms of the vertical brass screens will highlight the experience of travellers as they approach and drive straight into the building, moving through the dramatic ‘flying roof’ entrance and exit galleries which act as transition spaces between inside and out.

This light touch approach belies the permanent nature of the structures and technical demands of such a challenging environment. Brass was chosen for its long-life and durability, including resistance to road salt, after running a corrosion trial simulating the exposure of the material for 30 years. 

Commended project, European Copper in Architecture Award 2017:

 

Commended project, Awards 2017, Bosruck Tunnel, Bosruck, Austria

Uploaded by European Copper Institute on 2017-11-24.

 

 

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Building

Owner: 
Asfinag Bau Management GmbH
Completion date: 
2015
Country: 
Austria
Location: 

Categories

Applications: 
Panels
Transparent structures
Type of building: 
Transportation, infrastructure
Copper used: 
Brass
Estate: 
New

Architect

Name, office: 
RIEPL RIEPL ARCHITEKTEN ZT GMBH

Copper contractors

Title: 
Hodapp Austria GmbH

Awards

Season: 
2017
Categories: 
Shortlisted
Commended

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Nick Hay

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