Spering- and Falkenstein Tunnel

A9 Pyhrn Motorway


Autobahnen- und Schnellstraßen-Finanzierungs-Aktiengesellschaft (ASFINAG)


BeMo Tunnelling GmbH (BeMo) (TGF)
50% in JV with Wayss & Freytag Ingenieurbau AG (KGF)

Project location

Klaus a. d. Pyhrnbahn, Austria

Start of construction


End of construction


Project total value

35 million €


Northern Limestone Alps
Mainly carbonate rocks of the middle and upper Trias.

Predonderant nature of mountain:
Hillside debris/rubble (little in portal area); dolomite (ranging from low to heavily fragmented), Limestone (bulky up to heavily fragmented);
Shale / clay marl, Windischgarstener disturbance (mainly Speringtunnel)

Technical Data

Completion Tunnelkette Klaus:
Completion of the A9 Pyhrn-motorway within km 27.9+40 and 36.5+50 with creation of additional escape and emergency ways while ongoing traffic.
Lot 5:
Speringtunnel Easttube total length: 2,894 m
- Bench and invert excavation on the total length
- Enlargement of two breakdown bays length: 40 m
- Removal of the existing base profile
- Interior Construction
- 8 accessable cross passage Ø 9,84 m
2 with emergency vehicle accessable

Falkensteinstunnel Easttube total length: 752 m
- Excavation and securing (on overall cross-section)
- Interior Construction
- 2 accessable cross passage Ø 9,84 m