The 33 km long railway tunnel is the centerpiece of the new high-performance line between Graz and Klagenfurt. It consists of two single-track tunnels with cross passages at 500 m intervals. The maximum overburden is 1200 m. An emergency stop is planned in the middle of the tunnel. The center distance of the two tunnel tubes is about 40 m, in the area of the emergency stop about 50 m.
Work on the approx. 10 km long exploration tunnels and shafts began in 2004. Work on the main tunnel has been in progress since 2009. The tunneling is carried out in cyclical tunnelling and for the most part with a total of 3 tunnel boring machines. Release for traffic is planned for 2026.
Location: Styria/Carinthia; Austria
Client: ÖBB Infrastruktur
Commissioned by: ÖBB Infrastructure (exploration tunnel Leibenfeld & Mitterpichling; ventilation structure Paierdorf; KAT 1)/
STRABAG/Jäger Bau (KAT 2)/Porr AG (KAT 3)
Performance period: since 2014
Since the beginning of the project in 2004, we have been working on all contract sections, either on the part of the client or the companies carrying out the construction. Our entire range of services is used for tunnel construction, ranging from network and control surveying by means of gyroscopes to carrying out geotechnical measurements and instrumentation with data acquisition and processing up to tunneling control and supply of control systems for the TBMs.