ArchShowcase 
Sumit Singhal
Sumit Singhal loves modern architecture. He comes from a family of builders who have built more than 20 projects in the last ten years near Delhi in India. He has recently started writing about the architectural projects that catch his imagination. Elbbrücken Underground in Hamburg, Germany by gmp · von Gerkan, Marg and Partners ArchitectsJanuary 13th, 2020 by Sumit Singhal
Article source: gmp · von Gerkan, Marg and Partners Architects In time for the timetable change on December 15, 2019, trains stopped for the first time at the new Elbbrücken metropolitan railway (S-Bahn) station. With the opening of this stop, the Elbbrücken Underground and S-Bahn station has been completed and passengers can now change directly from the S-Bahn to the Underground system at this new public local transport interchange. Commuters will now have the opportunity to change trains here on their way to Hamburg city center, which will take some of the pressure off the main railway station. Like the Underground station that has already been completed, the roof of the S-Bahn station and the connecting Skywalk were designed by architects von Gerkan, Marg and Partners (gmp) in cooperation with the structural engineers schlaich bergermann partner (sbp).  View to the South: S-Bahn and Underground station with historic Elbe bridges, Image Courtesy © Marcus Bredt
 View to the South: S-Bahn and Underground station with historic Elbe bridges, Image Courtesy © Marcus Bredt
 View to the South: S-Bahn and Underground station with historic Elbe bridges, Image Courtesy © Marcus Bredt HafenCity is the most important urban development project of the growing Hamburg metropolitan region. When completed, the Elbbrücken precinct, which is currently being designed and built, will – with its urban Elbbrücken center – eventually form the eastern end of HafenCity. This is also the location of a congress hotel with a 19-story hotel tower designed by gmp. In order to connect the new urban precinct to the local public transport system, the U4 Underground line has been extended to the Elbbrücken bridges and a new stop has been completed on the S3/S31 S-Bahn line. The resulting Underground and S-Bahn station provides an attractive interchange opportunity, particularly for city-center-bound commuters who live to the south of the Elbe River, which will take a significant load off the main railway station during rush-hours. The Underground station and the design of the roof of the S-Bahn station display the same architectural signature, which means that the transport building and the Elbbrücken development appear as one entity. The design for the three-dimensional geometry of the steel and glass structure was submitted by the architects von Gerkan, Marg and Partners (gmp) together with structural engineers schlaich bergermann partner (sbp) as part of a competition for the Underground station, with the intention of creating a modern reflection of the imposing historic Elbbrücken bridges, which are listed as a historic monument.  New station with Elbe bridges, Image Courtesy © Marcus Bredt The special position of the Underground station – the line emerges from underground only just before the station and then runs at high level in parallel to the Elbbrücken bridges – creates different levels for the ticket hall, the platform, and the bridges crossing the tracks, which are accessed via steps, escalators, and elevators. The top steel bridge provides access to the Skywalk that connects the Underground station with the S-Bahn station. This 70-meter-long pedestrian bridge provides a barrier-free crossing over Versmannstrasse and the long-distance railway tracks. In this design, architecture and structural engineering are closely interconnected; the synthesis of these two disciplines is mandatory for the optimal development of such a project. The roof structure of the Underground station and the S-Bahn station creates an ellipsoidal arch profile consisting of crossing arched steel frames. The twisted steel beams are arranged to form a diamond-shaped grid pattern, in which the individual arches stabilize each other. Both roofs are based on an eight-meter axial grid. The structural steel members are outside the envelope – the glazing being supported on the inside – thereby achieving a distinguished presence in the cityscape, creating an aesthetic response to the adjacent Elbbrücken bridges. In line with the diamond pattern, the roof ends at both gable sides are shaped in the form of conspicuous projecting points. Analogous to the glass hall of the Underground station, the envelope of the Skywalk also has an ellipsoidal arch cross section that has been constructed using curved safety glass. The glazed envelope provides protection from the weather and offers spectacular views across the roads, tracks, and Elbbrücken bridges.  View to the South: S-Bahn and Underground station with historic Elbe bridges, Image Courtesy © Marcus Bredt, Image Courtesy © Marcus Bredt Architects von Gerkan, Marg and Partners (gmp): The architects’ practice gmp was formed in 1965 by Meinhard von Gerkan and Volkwin Marg. Since then, the practice has expanded by four additional partners and thirteen associate partners. With over 500 members of staff distributed across seven offices, gmp is active in Germany and abroad. In terms of its architecture, gmp takes a generalist position, whereby urban, building, and engineering design work together to create the final product. Schlaich bergermann partner (sbp): The independent consulting engineers of schlaich bergermann partner (sbp) have been responsible for the design and construction of complex buildings for more than 30 years. In cooperation with all those involved in the design – clients, architects, specialist engineers, industrial companies, and contractors – sbp creates lightweight roof structures with large spans, many types of bridges, slender towers, and innovative buildings through to solar power stations that embrace the latest technologies. gmp and sbp – A Success Story: The architects of gmp and the engineers of sbp share decades of experience working on numerous projects. Amongst the many stadiums for UEFA and FIFA World Cups, the two practices have jointly completed the new roofs for the Olympic Stadium in Berlin as well as for stadiums all over the world – in Europe, Africa, Brazil, and China.  Base point, Image Courtesy © Schlaich bergermann partner sbp  Image Courtesy © Schlaich bergermann partner sbp  Image Courtesy © Schlaich bergermann partner sbp  Image Courtesy © Schlaich bergermann partner sbp  Image Courtesy © gmp · von Gerkan, Marg and Partners Architects  Siteplan with surroundings, Image Courtesy © gmp · von Gerkan, Marg and Partners Architects  Siteplan with surroundings, Image Courtesy © gmp · von Gerkan, Marg and Partners Architects  Floor plan S-Bahn station, Image Courtesy © gmp · von Gerkan, Marg and Partners Architects  Cross section Underground and S-Bahn station with Skywalk, Image Courtesy © gmp · von Gerkan, Marg and Partners Architects
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