This website uses cookies. For more information check our policy.

Agree

Porto Metro
Portugal, Porto
2000 – 2003

The metro network of Portugal's second largest city, whose Alfama UNESCO has declared to be a World Cultural Heritage, is 70 kilometers long. The alignment of new sections of the Lines C and S were planned to cross under the historic city. In 2000, two Earth Pressure Balance Shields set to work for this job. Tunnel construction under the streets of Porto proved to be a really tricky operation. The EPB Shield S-203 completed the Line-C-Tunnel without any major interruptions in October 2002. Excellent advance rates of 18.2 meters per day were recorded. Line C was officially put into operation in January 2003. In Autumn 2003 EPB Shield S-160 completed the second tunnel.

Data Sheet

Country, Location

Portugal, Porto

Year

2000 – 2003

Application

Metro

Geology

Softground, fresh and weathered granite

Tunnelling length

8,326 m

Machine Data

1x EPB Shield:
Diameter: 8,700 mm
Lining method: Segmental lining
Cutterhead power: 2,400 kW
Torque: 12,900 kNm

1x EPB Shield:
Diameter: 8,900 mm
Lining method: Segmental lining
Cutterhead power: 2,400 kW
Torque: 12,900 kNm

Your contact person Contact us

Jack Brockway President and CEO Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser COO Herrenknecht Tunnelling Systems USA, Inc.