Technical specifications

Project description

  • 1 double-track railway tunnel
  • Total length 2,613 m
    of which a first part of approx. 80 m is driven in mining technique
  • 1,820 m in hard rock with TBM and 713 m in soft rock
  • Inner diameter tunnel 11.19 m
  • Drilling diameter 12,79 m
  • 3 rescue and escape tunnels with the respective shafts
  • As well as 5 bays for technical purposes in the tunnel

Construction method

  • TBM-driven tunnel with convertible TBM
    in hard rock as well as in soft rock(slurry mode)
  • Shield diameter 12.75 m
  • Double lining with tunnel segments as outer lining
    and in-situ concrete lining as inner lining
    with external sealing with a thickness of 30 cm each
  • The rescue tunnels are constructed in mining technique


  • Effingen beds (claystone partly cemented)
  • Lower freshwater Molasse Gravel in soft rock sections




General data

Eppenberg Tunnel Project
Part 1 „Tunnel in mining technique (conventional method)“
Railway tunnel
Double track Four-track extension between Aarau and Olten

SBB Infrastruktur

Wayss & Freytag Ingenieurbau AG
in a joint venture

Construction period:
July 2015 to July 2019

Construction costs
€ 80.8 million

Double-track Railway tunnel
Lenght: 2,613 m
Construction Method
TBM drive with hydroshield (slurry mode)
Related Projects
Weinberg Tunnel, Lots 3.1 and 3.2
Weinberg Tunnel, Lots 3.1 and 3.2

The Zurich main station - Altstetten - Oerlikon cross-city line forms the central part of the West- East-axis of the Swiss railway lines. The Weinberg tunnel is the centrepiece of the cross-city line and connects the new through station “Löwenstraße” in Zurich with Oerlikon station.

Read more
Uetliberg Tunnel
Uetliberg Tunnel

Greatly varying geology required different driving methods during the construction of the Uetliberg Tunnel in Switzerland. The 4.4 km long road tunnel connects the Birmensdorf bypass with the existing national road Zurich-Chur.

Read more
Crossrail Western Tunnels
Crossrail Western Tunnels
Great Britain

Railway tunnel and stations for the London railway system in one of the most advanced railway projects in Europe.

Read more

Cookies Policy

Our website uses cookies to improve your experience. Certain cookies can contain personal information. We deactivate Cookies, unless you allow Cooky usage.
Additional information

Allow Cookies
Do not allow cookies
Cookies Settings