Slowacki-Tunnel will be opened in 2015

The 1076 m long Slowacki Tunnel comprises two parallel tubes with an internal diameter of 11 m, each designed for two-lane road traffic. It is the largest tunnel ever built in Poland and the centerpiece of the 10 km long Slowacki Route, linking the deep water seaport of Gdansk with the international airport and with transit routes to the country‘s interior. A 90 m long Herrenknecht Mixshield-type tunnel boring machine with a shield diameter of 12.56 m dug the tubes under the Vistula. Herrenknecht was awarded the contract for the TBM giant by the Spanish construction company Obrascon Huarte...

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Issue 05/2016 Switzerland

Belchen Tunnel Rehabilitation: Excavation with Switzerland’s biggest TBM Diameter

Altogether 500 million Swiss francs will be invested for redeveloping the 3.2 km long Belchen Tunnel.  The scheme began in 2015. A JV comprising the companies Marti Tunnelbau, Marti Basel und Marti...

Issue 03/2021

Diameter Change – USA’s Largest Hard Rock TBM Undergoes Planned In-Tunnel Conversion

The drainage relief tunnel in Dallas, Texas, USA is an important project, as the tunnel will provide 100-year flood protection for east and southeast areas of the city--locations affected in recent...

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 03/2011 Switzerland

World Record along the Route: 4th Herrenknecht TBM successfully concludes the final Gotthard Drive

With the final breakthrough in the western bore the two 57 km long main bores of the Gotthard Base Tunnel have been completely excavated. On Wednesday March 23, 2011, the tunnellers proudly and...

Issue 03/2015 Germany

TBM at the Boßler Tunnel starts Drive and Ring Construction

The TBM named “Kätchchen” used to drive the Boßler Tunnel began its work in mid-April, 2015. The machine built by Herrenknecht first tackled the eastern bore, which will one day accommodate the...