Paris Metro Line 12 Extension
France, Paris
2009 – 2011

The plan was to lengthen the Metro Line 12 in northern Paris between La Porte de la Chapelle and Mairie d`Aubervilliers. From the Porte de la Chapelle, the extension will make it possible for the city center of Aubervilliers to be reached in under ten minutes. To this end, the S-499 Earth Pressure Balance Shield of a 9,150-mm diameter started working in October 2009. Its tunnelling operation took it through chalk, sand and limestone over a length 3,800 meters. On December 5, 2011, the large-diameter machine arrived at the target shaft.

Extension Line 12 (French)

Data Sheet

Country, Location

France, Paris


2009 – 2011




Chalk, sand, lime

Tunnelling length

3,640 m

Machine Data

1x EPB Shield:
Diameter: 9,150 mm
Lining method: Segmental lining
Cutterhead power: 2,800 kW
Torque: 1,700 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.