Technical specifications

Scope of work

  • 2 tunnels, each 4.4 km long
  • Excavated area: 160 m²

Construction method

  • Soft ground tunnelling: approx. 1.6 km in 7 sections
  • Drill and blast tunnelling: approx. 1.2 km in 3 sections
  • Pilot TBM (5 m diameter): 5.6 km
  • Tunnel bore extender TBE (14.40 m diameter): 5.6 km
  • Cut and cover method: approx. 0.4 km

Geology

  • Molasse (partly eroded at the end of the tunnels)
  • Moraine

General data

Project
Uetliberg Motorway Tunnel
two parallel tunnels, each for three lanes

Client
Baudirekton Kanton Zürich
[Building Authority of the Canton of Zurich]

Contractor
Wayss & Freytag Ingenieurbau AG
in a joint venture

Construction period
2000 to 2007

Construction costs
€ 340 million

Utilisation
Infrastructure
Type
Road Tunnel
Length
2 * 4.4 km
Construction Method
drill and blast tunneling
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