Technical specifications

2 single-track railway tunnels

• Length: 2 x 6,822 m
• Internal diameter: 9.60 m

2 cut and cover tunnel sections

• Each approximately 75 m long
• 13 cross-passages
• 2 tunnels for technical purposes

Railway sections in a cutting and on an embankment

• Lengths: 1,000 m and 340 m

Construction of sonic boom structures at all 4 tunnel portals in order to avoid the sonic boom effect

• Length: 75 m

Construction method

• TBM tunnelling using 2 Mixshields (slurry shields)
• Shield diameter: 10.88 m
• After 1,500 m conversion of TBMs from slurry shield mode to hard rock mode
• Segmental lining
• Thickness of segments: 45 cm
• Lowering of groundwater table by means of deep wells during tunnelling in open mode (water pressure 6.1 bar)

Geology

• Buntsandstein (variegated sandstone)
• Fault zone with Keuper sandstone formations