Technical specifications

Scope of work

  • 2 x 7.9 km
    Standard cross-section: 80 m²
    Emergency lay-bys: 120 m²;
  • 23 cross-passages,
  • 2 central ventilation stations with exhaust shaft
  • 2 air supply adits
  • tunnelling under a 100-year old railway tunnel
    with a small clearance between the tunnels

Construction method

  • Drill and blast method
  • Sprayed concrete lining (SCL) method

Geology

  • Porphyry
  • Conglomerates

 

 

 

General data

Project
Rennsteig Tunnel
twin-tube, two-lane motorway tunnel on the BAB A 71

Client
DEGES Deutsche Einheit Fernstraßenplanungs- und -bau GmbH, Berlin

Contractor
Wayss & Freytag Ingenieurbau AG
as commercial leader of a joint venture

Construction period
1998 - 2003

Construction costs
€ 192 million

Utilisation
Infrastructure
Type
Road Tunnel, double-track
Length
2 * 7.9 km
Construction Method
Mining technique protected by a pipe umbrella
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