Technical specifications

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

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
€ 171 million

Utilisation
Infrastructure
Type
Road Tunnel, double-track
Length
3 km
Construction Method
Drill and blast method in combination with tunnel excavator

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