UNDERGROUND, Vienna, Austria
SWIETELSKY is currently expanding underground metro in Austria’s capital. As a member of the U2xU5 Rathaus/Frankhplatz consortium, SWIETELSKY was commissioned by Wiener Linien to build a total of more than two kilometres of tunnel and to construct numerous shafts for the station areas. Innovative hydraulic stiffener for securing the excavation pit constitute a special feature of the preliminary work on the Triester Straße shaft. Their modularity results in a remarkable time and cost advantage compared to conventional shoring systems. The U5 is to be opened to traffic by 2026 and the U2 by 2028.