Excavation for the underground line from Ládvi to Letnany, Prague

Extension of the Prague metro line C to the northern town of Prosek, Czech Republic

Prague, a city of 1.2 million inhabitants, has a relatively young metro system that moves more than 1 million passengers per day. The system corresponds to the model common in Eastern Europe: three main lines crossing at three central stations, thereby forming a triangle in the city center.

The first 18.1 km long section of the Prague metro, line C, was opened in 1974. Subsequently, line C was extended to Háje in the south in 1980. Another extension across the river Vltava to Holesovice was completed in 1984. Line C is the underground line closest to the surface and connects the north with Prague’s south-east via 15 stations.

On May 24, 2004 the foundation was laid in Prosek for another extension of line C: construction stage IV.C2. This extension of the metro has been designed to provide a fast connection of the northern suburban town of Prosek with its 90,000 inhabitants and the Letnany industrial zone with the old town in Prague. The line runs relatively close to the surface, so that the metro stations can be built using the open-cut and cover method.

The plans for the construction of the new Prosek metro station had already been changed several times at the preliminary stage, thus always providing new challenges for the construction companies involved.

SM7 A.S. is proud to contribute to the successful completion of this challenging project through its own technical know-how and the use of high-quality DSI products. The retaining walls of the excavated sites of the Prosek and Strizkov stations were temporarily tied back using 8,135 m DYWIDAG Multistrand Anchors. SM7 A.S. also supplied high-quality DYWIDAG geotechnical products such as glass fiber anchors and DYWIDAG Bar Anchors for additional single structures as well as technical equipment.