As part of the upgrading of the Westbahn trunk line, HOCHTIEF Construction Austria is constructing a new line section between Vienna and St. Pölten in a consortium contracted by ÖBB-Infrastruktur Bau AG. The more than 13 kilometer long Wienerwald Tunnel forms a major part of this new line, running beneath the northern ridges of the Wienerwald between Gablitz and Mauerbach with overlying ground of between 25 and 400 meters.

Project data

Client: ÖBB-Infrastruktur Bau AG Contractor (Joint venture): Arge Tunnel Wienerwald Construction period: 2004 to 2009 Contract amount (net): 331.5 million EUR

Technical data

Rock excavation: approx. 2,000,000 m³ Concrete: 430,000 m³ Shotcrete: 90,000 m³ Liner segments: approx. 60 000 pcs.

Construction phases

East heading:
Westwards from Vienna-Weidlingau (2,350 meters double-track tunnel by shotcrete tunneling (NATM), full section A = 120 - 245 square meters)

Taglesberg landfill:
Creation of an approx. 470 meter long muck gallery for excavated material deposited by conveyor belt (gradient: 32 percent); placement of approx. 860,000 cubic meters of rock excavated at the west heading

West heading:
Eastwards from Chorherrn, Lower Austria, mechanical heading using two tunnel boring machines with hardrock drilling tools (D = 10.63 meters) 2 x 10,750 meters continuous TBM heading, full section A = 87 square meters, creation of 21 crosscuts and four turning niches, lined with liner segments and waterproof inner shell

Overground phase:
Earthworks and road construction, landscaping, recultivation; placement of approx. 1.2 million cubic meters of excavated material from the west heading over a length of approx. 11 kilometers for the construction of a frontage road and for filling a rail embankment.

More information about this project you can find in our Project sheet.