Ankara Metro
Turkey, Ankara
2006 – 2014

Ankara's infrastructure planners go about upgrading the city's metro system with several new lines in adition to the two existing lines "Metro" and "Ankaray". The route for the Line M4 runs with overburdens of between three and 22 meters under roads, bridges, and buildings mainly in clay and tuff. It will connect downtown Ankara with the northern suburbs. The underground section was excavated by a Herrenknecht EPB Shield with a diameter of 5,950mm between March 2006 and June 2014.

Data Sheet

Country, Location

Turkey, Ankara


2006 – 2014




Soft ground
Clay, tuff

Tunnelling length

8,770 m

Machine Data

1x EPB Shield:
Diameter: 5,950 mm
Lining method: Segmental lining
Cutterhead power: 945 kW
Torque: 4,435 kNm

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.