Antwerpen Metro ASDAM
Belgium, Antwerp
2002 – 2003

For the north/south connection between Brussels and Amsterdam, two new 1,211-meter-long tunnels were built to the historic "Antwerpen Central" station in the center of the Belgian metropolis of Antwerp. From 2007 the "Thalys" express train roars through the tubes. Construction work saw the main rail station of the Belgian city of one million inhabitants converted from a terminus to a through station. Under one of the metro lines two tunnels are excavated and lined with segments.

The 820-tonne-heavy and 58-meter-long Mixshield drove through ground composed mainly of fine sands with shell deposits. Buildings and structures tunnelled under in the center of Antwerp included the "Astrid Plein", "Astrid Park Plaza Hotel", a multi-storey car-park and operational metro tunnels. The "Zandvreter" (sand eater) - the name for the Mixshield for the first tube - was started up at the end of September 2002. As early as February 19, 2003, the S-209 Mixshield had finished excavating the first tunnel and had reliably accomplished breakthrough.

On tunnelling the first tube, the Mixshield came up with advance rates per week of up to 121.5 meters. On May 3, 2003 the shield with the gantry coupled on, took up tunnelling for the second tube. Within a short period, the boring giant - now named "Krabbekoker" (scraper can) – chalked up a weekly best performance of 123 meters. Breakthrough of the second tunnel occurred on September 8, 2003.

Data Sheet

Country, Location

Belgium, Antwerp


2002 – 2003




Soft ground
Heterogeneous ground
Fine sand

Tunnelling length

2,422 m

Machine Data

1x Mixshield:
Diameter: 8,270 mm
Lining method: Segmental lining
Cutterhead power: 750 kW
Torque: 4,100 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.