Dreirosenbrücke
 Dreirosenbrücke
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| use | Road bridge | |
| Convicted | A3 | |
| Crossing of | Rhine | |
| place | Basel | |
| construction | Double deck bridge | |
| overall length | 226 meters | |
| location | ||
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The Dreirosenbrücke is a road bridge in the Swiss city of Basel and is the last Swiss Rhine bridge . The bridge got its name after the property "To the three roses" at the Kleinbasler bridgehead. The original estate at this point belonged to the Iselin family, whose family coat of arms shows three white roses.
prehistory
The city expansion plans of 1897 already provided for another Rhine crossing below the Johanniterbrücke . In the period from 1907 to 1910 there was talk of a railway bridge as a connecting line between the planned Rheinhafen Kleinhüningen and the St. Johannbahnhof . In 1918 a Federal Council resolution stated that the subsidy for the construction of the Rhine port was dependent on the construction of the Dreirosenbrücke, a combined rail and road bridge. A project was created for a bridge resting on two pillars, which was to be 20 meters wide, of which 4 meters was reserved for the railroad track. Since the city had an unfavorable financial situation after the First World War and there was an obligation to solve more urgent tasks, they wanted to gain time and sought to postpone construction. This also succeeded and in the meantime the Swiss Federal Railways and the Deutsche Reichsbahn reached an agreement on the passage of port traffic through the Badischer Bahnhof , so that the SBB could forego the use of the planned Dreirosenbrücke.
First bridge
The abandonment of the combined bridge created a new situation, but the call for an additional Rhine crossing did not diminish in the urban quarters of St. Johann , Horburg and Kleinhüningen and on June 25, 1925, an action committee submitted an initiative with 7,444 signatures , which shortly afterwards was declared by the Grand Council as significant. In 1930, 76 designs were submitted to an international competition. The first prize went to Maschinenfabrik Augsburg-Nürnberg AG ( MAN AG ) from Gustavsburg and Grün & Bilfinger from Mannheim for their solid wall girder bridge supported by two pillars. After a long wait, the population of Basel was finally able to give their blessing to the building loan on July 11, 1931, and in October 1931 the construction equipment was already running. On September 1, 1934, the bridge was opened to traffic.
The bridge consisted of a continuous steel beam construction with a length of 225 meters, rested on two supporting pillars and had three openings with spans of 75 meters, 105 meters and 75 meters. The total width of the bridge was 18 meters, of which 12 meters were accounted for by the double-track tramway and 3 meters for the sidewalks .
Second bridge
In 1960, a Federal Council resolution on the Swiss National Roads Act obliged Basel to establish a motorway link between Switzerland, Germany and France. This city motorway was highly controversial and two popular initiatives tried to prevent it from being realized. The connection between Switzerland and Germany was opened around 1974 (?) And on September 1, 1994 construction began on the A3 north bypass , which connects the Swiss A2 with the French A35 motorway and has been fully open since June 16, 2007.
In order to accommodate the motorway, the Dreirosenbrücke had to be replaced and it was decided to build a double-storey twin bridge over the Rhine, with the motorway in a closed vault on the lower level (for noise protection on the city side with glazing - originally, double-sided glazing was planned, what but was abandoned in 2007), while the upper level is used for local traffic (car, bike, public transport) and pedestrians. Two tram lanes, separated from individual traffic, lead across the entire bridge.
The new Dreirosenbrücke was built in stages according to plans by the Basel architectural office Steib + Steib . First, from 1999, the northern, downstream half of the bridge was built next to the old first bridge and opened to traffic on November 5, 2001. Then the old bridge was demolished and the second half built on the site of the old bridge. The whole new bridge was opened on November 8, 2004.
The Dreirosenbrücke is a steel composite truss bridge, with actually two bridges, each with two 133-meter-long bridge halves, lying next to each other. The bridge is 226 meters long, has three openings with a span of 77 meters, 105 meters and 84 meters and stands on two pillars, with the pillars of the old bridge being integrated into them. The two bridges are each 14.90 meters wide, the tram line and the roadways, however, are asymmetrically shifted to the north, so that an approximately 10 meter wide boulevard for pedestrians has been created on the southern side .
Web links
Rhine bridges: Holzapfelweg at the Birsfelden power plant | Railway bridge | Black Forest Bridge | Wettstein Bridge | Middle bridge | Johanniterbrücke | Dreirosenbrücke
City bridges: Birskopfstegbrücke | Birsig Viaduct | Dorenbach Viaduct | Heuwaage Viaduct | Peter Merian Bridge
Former bridges: Dufour Bridge | St. Alban Bridge
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The next bridge upstream: Johanniterbrücke |
Bridges over the Rhine |
The next bridge downstream: Dreiländerbrücke |