VDE 8.2 NBS Erfurt-Leipzig / Halle
PFA 2.2 Bibratunnel

The Bibra tunnel is part of the transport construction projects, Deutsche Einheit Nr. 8, the expansion- new road Nuremberg-Erfurt-Leipzig / Halle-Berlin. The Bibra tunnel consists of two single-rail track tunnels planned for a maximum speed of 300 km/h.
The main tunnel elements are described below:

• 2 x 6’346 m (86 m2) twin tube rail tunnel
• Tunnel tube diameter: 9.6 m
• Distance between track axes: 25 m
• 13 cross connections (every 500 m)
• 2 ventilation shafts: 30 m each

Work Description:
Underground excavation, rock support and grouting
work

• Excavation methods: Drill and blast with top heading and bench with max. pull length of 1.8 m
• Excavated length and volume: 2 x 6'346 m, approx. 1'100'000 m³
• Standard rock support: shotcrete and systematic rock bolts
• Additional rock support: lattice girders
• Shaft excavation: 2 x 30 m, D=2.5 m using the Alimak method

Surface- and groundwork

• Pre-cut excavations and slope protection
• Area of site installation & facilities: 8 ha
• Roadworks of 10 km
• Fresh water and drainage system
• Management of excavated material: 1.4 Mill. m³

Concrete work

• Reinforced tunnel concrete lining: 17’000 t of steel
• Portals: up to 115 m long Sonic-boom structures
• Concrete banquets
• Shaft inner lining with WUBK designed for a water column of over 20 m
• Total concrete and shotcrete volume: approx. 450'000 m³

The Bibra tunnel runs along its entire length in rock formations of medium variegated sandstone. The tunnel has an overburden of about 15 to 50 meters.