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 wide reinforced concrete segmental rings (5 – 1) and the TBM arrived at the tunnel’s south portal on November 13, 2009 after 14 months. Following the breakthrough 30 cross-passages are now being produced by drill+blast between the 2 tunnel bores as well as the connection with the ventilation shafts. Subsequently the new tunnel tube will be lined (inner shell, concrete carriageway, signal units etc.).

T...

Related articles:

Issue 2013-02 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...

more
Issue 2011-08 Austria

Bosruck Tunnel: Breakthrough for 2nd Bore

The breakthrough of the second bore for the 5.5 km long Bosruck Tunnel designed for 2 lanes took place on August 11, 2011 after only 17 months of construction. It occurred 2.5 months earlier than...

more
Issue 2013-03 Austria

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...

more
Issue 2010-04 Austria

Second Bore for Bosruck Tunnel

The Asfinag as operator of the motorway in Austria has commissioned the construction of a second tunnel bore with 5 breakdown bays and 11 cross-passages (6 of them negotiable with vehicles) for the...

more
Issue 2010-07 Austria

Second Bore for the Tauern Tunnel

The second bore for the Tauern Tunnel on the A10 motorway is 6,400 m long and was driven by mining means within 22 months. It was opened on April 30, 2010 following less than 4 years’ construction,...

more