Planning of tunnel excavation for the Vienna underground - construction Lot U1/9 / Planung der Tunnelvortriebe für die Wiener U-Bahn - Bauabschnitt U1/9

The extension of underground line U1 from Reumannplatz station to Oberlaa station, which includes construction lot U1/9, significantly enhances accessibility for local residents and workplaces, achieves optimal regional accessibility and improves connections to regional buses, a park & ride facility as well as easing the pressure on the Reumannplatz station. Starting from Reumannplatz, the U1 will increase by 4.6 km with five new stations in the forthcoming years. By 2017, it will be the longest underground line in Vienna (19.2 km).
Planning for construction preparation and the detailed design of construction lot U1/9 is being carried out by the planning group PCD - FCP - iC in cooperation with Architektengruppe AGU. PCD, the lead planning partner, is responsible for planning of the cut-and-cover method, whilst iC is responsible for the design of the mined tunnel sections. Preliminary geotechnical work, main geotechnical investigations and geotechnical support during construction were undertaken by the municipal department MA 29 (bridge construction and ground engineering). Project management incl. controlling and site supervision is done by the Client (Abteilung Bau, Planung und Projektmanagement of Wiener Linien). The design for obtaining the building permit in accordance with the Austrian railway law was carried out in 2009 and 2010 and approval was given in January 2011. Tenders were first drafted in 2010, and were published in the summer of 2011. The tender was awarded to the Strabag company. Construction started in the spring of 2012. Tunnel excavation commenced at the end of January 2014.