Pfaendertunnel

Second Tube

Client

ASFINAG Bau Management GmbH

Contractor

BeMo Tunnelling GmbH (BeMo)

Project location

Rheintalautobahn A 14, Bregenz - Lochau, Vorarlberg, Austria

Start of construction

2007

End of construction

2013

Project total value

130 million €

Geology

„Molasse“ consisting of conglomerate, sandstone, marl sandstone, marl and clay-marl, soil

Technical Data

• Double-lane motorway tunnel, 1 tube
o Total length main tunnel: 6,744 m
o Excavation – soil (mining): 100 m
o Cross-section: approx. 112 m²
• 16 Crosspassages (CP) approx. 700 m
o 1 CP for vehicles (FQ: 48.84 – 55.74 m²)
o 6 CPs for emergency vehicles (EQ: 32.4 – 41.5 m²)
o 9 Crosspassages (GQ – 13.80 – 17.88 m²)
• 7 lay-by enlargements - length: 5 x 40 m, 2 x 80 m
• 4 ventilation caverns: length each 35 m
• 4 inclinded tunnels (32.5 %): 29.04 – 37.97 m²
• Execution by Single Shield TBM, lining with concrete segments, crosspassages and soil by mining, NATM

Further project related information

• First road tunnel in Austria to be built by TBM; TBM: Ø 11.92 m, 180 m total length, 4,800 kW
• 4 ventilation caverns with 4 inclinded tunnels to the existing ventilation shafts
• Sprayed concrete lining (shotcrete) in breakdown bays; Galleries North and South incl. noise protection
• Service building North; water protection facilities North and South