SBT 2.1. Fröschnitzgraben
Client: Österreichische Bundesbahnen AG (ÖBB)
Contractor ARGE / JV
Swietelsky – Implenia
General tunnel Semmering – pilot point 2.1
- Shaft Fröschnitz 1 and 2 with a depth of more than 400 m, a diameter of 11 m or 8.5 m
- Building for operation and ventilation Fröschnitzgraben
- Two connected excavation fronts (including a cavern), approximately 8.6 km down towards Gloggnitz
- Two cyclic excavation fronts, about 4.3 km further towards Mürzzuschlag
- 26 crossbeams (emergency exits)
- Parking niches in the length of approx. 1 km
- 4.4 Mio. m³ of excavated material