Redeveloping the Pfänder Tunnel

After commissioning the 2nd bore in mid-2012, the original 6,585 m long, twin-track bore of the Pfänder Tunnel was closed to traffic to be redeveloped. In late 2012, most of the construction jobs in the original bore were already completed. Four new cross-passages were ex­cavated – in addition to the 11 in part negotiable cross-passages between the 2 tunnel bores – and the concrete carriageway (50,000 m²) installed. Most of the tunnel surface coating was also produced.

The facilities for the extinguishing water supply are to be renewed. This will be followed by the installation of lighting, ventilation and signalling technology. The new command post set up at the north portal for emergency services will contribute towards enhancing safety in conjunction with the existing control centre in the Weidach service facility at the south portal.

Once the redevelopment work is completed in the original bore, one-way traffic will run through the 2 twin-track tunnels from mid-2013. This will result in more safety in the greater Bregenz region as well as fewer tailbacks. The Asfinag (Austrian motorway operator) invested € 205 million in this project – with around € 15 million earmarked for redeveloping the existing bore.⇥G.B.


Related articles:

Issue 03/2010 Austria

Breakthrough at Pfänder Tunnel

A second bore for the 6.6 km long Pfänder Tunnel was driven with a tunnelling machine (S-494, Herrenknecht AG) with 11.85 m cutterhead diameter. The support was provided with 25 cm thick and 2 m...

Issue 02/2013 Austria

Pfänder Tunnel: 2nd Bore opened for Traffic

The 6,585 m long, two-lane Pfänder Tunnel on the A14 in Vorarlberg/Austria with an average daily frequency exceeding 30,000 vehicles is being provided with a second bore, which is also 2-lane, to...

Issue 06/2013 Austria

Bosruck Tunnel: Redeveloping the existing Bore

A second bore was produced by drill+blast using the New Austrian Tunnelling Method (NATM) for the 5.5 km long, 2-lane Bosruck Tunnel on the A?9 motorway. It possesses 2 lanes. After being broken...

Issue 07/2011 Germany

Redeveloping the Schlüchtern Tunnel

The New Schlüchtern Tunnel is nearly 4 k m long and possesses 9 m internal diameter. It was driven using a tunnel boring machine (TBM) at a distance of 50 to 90 m from the existing tunnel [1-4]. As...

Issue 07/2012 Switzerland

Redeveloping the Simplon Tunnel

The 19.80 km long Simplon Tunnel between Brig/CH and Iselle/I possesses 2 single-track bores, which are connected by 46 cross-passages set roughly 500 m apart and 2 sets of points in the middle of the...