Technical specifications

Scope of work

  • Length: 2.2 km, excavated cross-section: 80 m² - 100 m²
  • 2 parking bays, area: 125 m²
  • 6 cross-passages to an existing exploration tunnel
  • Ventilation shaft, diameter: 4m, depth: 38 m
  • Service buildings and emergency exit shafts

Construction method

  • Drill and blast method in combination with tunnel excavator,
    length: 1.4 km;
  • Cut and cover method: 732 m

Geology

  • Ground moraine
  • Flysch sedimentary rock

General data

Project
B 1 Federal Road Wiener Straße
Henndorf Bypass, two-lane road tunnel

Client
Land Salzburg, Landesbaudirektion
[State of Salzburg, State Building Authority]

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

Construction period
2006 to 2009

Construction costs
€ 38 million

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

Related Projects
Roppen Tunnel JV
Roppen Tunnel JV
Austria

The Roppen tunnel between Innsbruck and Landeck in Austria was made safer by the construction of the second tube. The 5,069 meter long tunnel was driven conventionally.

Read more
Darmsheim Tunnel
Darmsheim Tunnel
Germany

The long-expected bypass in the Swabian town of Darmsheim will ensure an improved quality of life, since HGV traffic with approx. 23,000 vehicles will not pass through the town in future.

Read more
Grouft Tunnel
Grouft Tunnel
Luxembourg

A double-lane motorway tunnel with a length of approx. 3 km forms part of the new motorway section of ‚Route du Nord' in the biggest infrastructure project in Luxembourg. The two tubes were carried out with an incline of nearly 5%.

Read more