Bosruck Tunnel

Second Tube

Client

ASFINAG Bau Management GmbH
Design: Laabmayr - ILF Joint Venture / Supervision: Geoconsult ZT

Contractor

BeMo Tunnelling GmbH (BeMo)

Project location

A9 Pyhrn Motorway, Spital am Pyhrn, Austria

Start of construction

2009

End of construction

2013

Project total value

127.4 million €

Geology

Carbonate, sandstone, marl, conglomerate, „Haselgebirge“, „Werfener“ layers, anhydrite, dolomite

Technical Data

• Double-lane motorway tunnel, construction of 2nd tube
• Total length of tunnel: 17,799 ft (5,425 m)
o Excavation: 17,372 ft (5,295 m)
o Cross-section: 979.52 – 1,442.36 SF (91 - 134 m²)
o 5 Lay-by enlargements length each: 167 ft (51 m)
o Cross-section enlargements: up to 1,615 SF (160 m²)
• 11 Crosspassages - CPs (each GQ and EQ): 203 ft (65 m)
o 5 CPs for emergency vehicles (EQ): ca. 646 SF (60 m²)
o 6 CPs walkable / pedestrian (GQ): ca. 484 SF (45 m²)
• Excavation by drill & blast 15,600ft (4,755m), excav. 1,772ft (540m)
• Execution by NATM, in-situ concrete secondary lining

Further project related information

• Material management incl. disposal: 27,192,293 ft³ (770,000 m³) total excavated, 11,124,120 ft³ (315,000 m³) to be reused for the heavy duty car-park Phyrn Priel
• Continuous/ongoing refurbishment works in the existing east tube during the period of construction
• 2 ventilation galleries (LQ), 91 niches (43 emergency NLN + 48 extinguisher FLN), structures above ground (operation building north / south with elevated tank), heavy duty car-park Phyrn Priel