Tunnels - Wayss & Freytag Ingenieurbau AG

Stafelter Tunnel
Luxembourg
General Data:
Project: Stafelter Berg Tunnel
twin-tube, two-lane motorway tunnel
Client: Grand-Duché de Luxembourg - Ministère des Travaux Publics [Grand Duchy of
Luxembourg - Ministry of Public Works] represented by Administration des Ponts et
Chaussées, Luxembourg [Bridge and Road Department]
Contractor: Wayss & Freytag Ingenieurbau AG
as technical leader of a joint venture
Construction period: September 2008 to August 2012
Construction costs: € 88 million
Technical Data:
Scope of work: 2 double-lane motorway tunnels, each with a length of 1,850 m
(excavated area: 74 m² - 114 m²), of which 1,650 m are constructed using
mining techniques and 200 m using the cut and cover method
Construction method: Drill and blast method in combination with tunnel excavator, construction
of a pipe umbrella support system in some areas with shallow soil cover
Geology: Luxembourg Sandstone
Grouft Tunnel
Luxembourg
General Data:
Project: Grouft Tunnel, Luxembourg;
twin-tube, two-lane motorway tunnel
Client: Grand-Duché de Luxembourg - Ministère des Travaux Publics
[Grand Duchy of Luxembourg - Ministry of Public Works]
represented by Administration des Ponts et Chaussées,
Luxembourg [Bridge and Road Department]
Contractor: Wayss & Freytag Ingenieurbau AG
as technical leader of a joint venture
Construction period: February 2005 to August 2009
Construction costs: € 150 million
Technical Data:
Scope of work: 1 double-lane tunnel, 3 km, excavated cross-section: 96 m²;
1 triple-lane tunnel, 2.9 km, excavated cross-section: 174 m²;
1 cavern with ventilation shaft;
10 cross-passages, of which 4 are accessible by vehicles;
1 rescue tunnel, length: 40 m
Construction method: Drill and blast method in combination with tunnel
excavator, sprayed concrete lining (SCL) method
Geology: Marl, sandstone, Keuper
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