Stadtbahnlinie U81 Bauprojekt

Kobler Hauptbahnhof og flyplass

The new Stadtbahnlinie U81 in Düsseldorf is an essential infrastructure project aimed at connecting the main railway station (Hauptbahnhof) with the airport and Messe Düsseldorf. The first construction phase covers a stretch of 1.9 km from Freiligrathplatz to the traffic hub Nordstern and then to the airport, where an underground station is planned. This project aims to alleviate traffic congestion in the city center and improve connectivity to important node points.

480 meter lang stålkonstruksjon

The project's scope includes the erection of several engineering structures, like ramps, an embankment, and a 480-meter long arch-shaped steel bridge constructed using the incremental launching method. Moreover, extensive track construction, overhead line works, and noise barriers will also be installed. Efficient traffic management, phased construction schedules, and additional road and water management works are part of this construction package.

Meticulous Traffic Management Needed

A critical challenge lies in the incremental launching of the arch bridge over the heavily trafficked intersection of the A44, B8, and U79. The tram service of the U79 must be maintained throughout the different construction phases, necessitating the continuous operation of support piers and the bridge sliding under ongoing traffic, requiring meticulous planning and coordination.

Ferdigstilles desember 2022

The project timeline includes a start date in June 2020 with completion targeted for December 2022. The initial construction lot's cost is estimated at 23.1 million CHF. The Düsseldorf traffic management office is the principal contractor, with Frank Gardemeier overseeing the project. Grassl is the project's architect along with various specialized construction groups involved.

Bygger tunnel- og stasjonsstruktur

Another significant part of the project, denoted as Lot 2, involves the main structural work of the tunnel. This includes creating a construction pit with back-anchored diaphragm walls, excavation (partly underwater), and building a ramp and station in an open construction method. Key construction activities cover tunnel ramps (170 m long), the main tunnel (210 m long), and the station (180 m long). The work also encompasses constructing 22,000 m² diaphragm walls, Berliner Verbau, underwater concrete, micropiles, handling 100,000 m³ of excavation and disposal, and carrying out road demolition and new construction (10,000/15,000 m²).

Nabo til Düsseldorf lufthavn

Notably, the construction site is located immediately adjacent to Düsseldorf Airport, presenting the challenge of ensuring airport operations remain undisturbed. The project incurred a cost of 24.2 million CHF, 23 million EUR, 19.9 million GBP, 237 million NOK, 239 million SEK, and 25.8 million USD. The timeline for this section had a commencement in May 2020, with completion aimed for November 2022.