Fleher bridge

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Coordinates: 51 ° 11 ′ 8 ″  N , 6 ° 46 ′ 30 ″  E

A46 Fleher bridge
Fleher bridge
Convicted Federal motorway 46
Crossing of Rhine
place Düsseldorf - Flehe - Neuss - Grimlinghausen / Uedesheim
construction Cable-stayed bridge
overall length 1166 meters
width 41.7 meters
Longest span 368 meters
Construction height 3.8 meters
vehicles per day 85,100 (2017)
building-costs 94.6 million DM (2020: approx. 110 million EUR)
start of building 1976
completion 1979
opening 3rd November 1979
location
Fleher Bridge (North Rhine-Westphalia)
Fleher bridge
Fleher Bridge (view from the Uedesheimer Rheinaue, Neuss Grimlinghausen)

The Fleher Bridge , also called Rheinbrücke Düsseldorf-Flehe , between Düsseldorf and Neuss is a motorway bridge (with pedestrian and bicycle lanes parallel to the lanes) over the Rhine that takes the A 46 from the left bank of the Rhine ( Rhein-Kreis Neuss , Stadteregion Aachen , Kreis Heinsberg , Belgium , Netherlands ) with the Bergisches Land ( Wuppertal , Solingen , Hagen ) and the south of Düsseldorf. It also forms the southern part of the Düsseldorf autobahn tangent square and is named after the Flehe district of the city.

The structure has three lanes and a hard shoulder in each direction as well as a 2.75 m wide sidewalk and bike path on both sides. The bridge does not cross the Rhine at a right angle in order to protect the water catchment area of ​​the old Flehe waterworks .

The Fleher Bridge has the highest bridge pylon in Germany and the largest span of all cable-stayed bridges in Germany. When it was completed, it was also the most widely spanned single-hip cable-stayed bridge in the world, with a main span of 368 m.

construction

Characteristic of the Fleher Rhine bridge, a einhüftige center beam cable-stayed bridge is standing on the left bank of the Rhine 146.47 m high reinforced concrete pylon , like a turned upside Ypsilon looks. In the stems of the pylon there is an elevator and a staircase above the carriageway. The stems are only 6.4 m wide in the longitudinal direction of the bridge. They were made with climbing formwork.

The main opening spanning 368 m over the Rhine has a 41.7 m wide bridge deck made of a 3-cell steel hollow box with a floor slab width of 16.3 m and an orthotropic deck slab . This part of the bridge is located on the right bank of the Rhine on self-aligning bearings in a reinforced concrete structure that also leads over the dike there.

The 13-span foreland bridge is a prestressed concrete structure with a length of 780 m and individual support widths of 13 × 60 m. The superstructure consists of two single-cell hollow boxes, each with a 7.0 m wide base plate, over a length of nine fields. The remaining four fields in the 240 m long area of ​​the bridge bracing end at the pylon; they have a five-cell box girder cross-section with a floor slab width of 29.5 m.

The steel superstructure and the prestressed concrete bridge are connected to the pylon with a steel crossbeam clamped into the pylon in such a way that a continuous girder system is created. The construction height of the steel bridge deck as well as the prestressed concrete approach bridge is 3.80 m.

history

The overall concept came from Gerd Lohmer , the foreland bridge on the Neuss side of the Rhine was planned by Fritz Leonhardt . He had also drawn up a proposal for the overall concept, but it was not implemented. Construction of the bridge began in 1976 and cost 94.6 million DM (2020: approx. 110 million EUR).

The clearance of this bridge on November 3, 1979 meant a significant relief of through traffic in the south of Düsseldorf and a considerable relief of the former south bridge , which until then was the sole southern entrance gate from the left bank of the Rhine to Düsseldorf. At the same time, it was a prerequisite for connecting the A 46 to the A 57 on the left bank of the Rhine . In 1980 it was not yet listed in the ADAC General Atlas , but it was not included in the ADAC car travel book from 1981. In 1991, the Federal Ministry of Transport rejected the installation of noise protection.

Rope replacement on the bridge with tunnel-like cladding (2009)

In 2003, during a magnetic induction check, it was found that the suspension ropes had rust damage and that 9 of the 96 individual ropes with their 325 individual wires had to be completely replaced. This measure should cost a total of 9.5 million euros, at the same time an improved rust protection should be applied for around 7.5 million euros (quote: "Laymen would talk about a complete overhaul"). Work began in June 2006 and was completed for the Düsseldorf side by early 2010. The subsequent work on the Neuss side was completed in September 2010. The rope exchange cost around 9.2 million euros. Since the ropes were rehabilitated in bundles and these were each enclosed in a tunnel-like cladding, work could be carried out regardless of the weather.

Noise barrier (2019)

The next construction phase was the renovation of the pylon, which should begin in autumn 2011. It was delayed because of the motorway bridge near Dormagen that burned down in February 2012 , on whose alternative route the Fleher Bridge was located, which therefore could not be closed as planned.

In October 2011, the contracts for work to improve noise protection that had been promised to residents in 2010 were awarded. However, this only happened after the Fleher citizens' interest group hired a lawyer to represent their interests. A 1.50 m high noise barrier had been erected by the end of 2012 .

From March 2013 the further renovation and the additional improvement of the noise protection could be started, for which by October 2013 the lane in the direction of Wuppertal was reduced to two lanes each. In addition, the expansion joint was replaced, which had already happened in the other direction in 2012. In addition, it was planned to repair the concrete, to seal the bridge and to cover it with new asphalt.

Speed ​​measurement system (2019)

On March 6, 2012, the district government , the city of Düsseldorf and the police agreed on the construction of a speed measurement system from Vitronic on the bridge. At the end of May 2013, speed monitoring of the limit of 80 km / h in the direction of Neuss went into operation to protect the residents in Flehe from noise. The system sends the photos digitally to the public order office in Düsseldorf. The city of Düsseldorf bore the costs for the construction of the plant. From September 2013 the speed was also monitored in the direction of Düsseldorf.

On October 30, 2014, the Düsseldorf Administrative Court ruled that the speed limit was illegal: In 2010, the Ministry of Economics, Energy, Building, Housing and Transport of the State of North Rhine-Westphalia applied for the speed limit to be reduced to 80 km / h due to the renovation and also requested it whether it could be kept permanently for noise protection reasons. However, it is not possible to infer from the files whether the requested test of a permanent speed limit has taken place and what results it may have produced. Much more, the country announced that no noise investigations had taken place on the bridge so far. The construction work had meanwhile been completed and the renovation of the bridge pier was only planned for the next few years, so that the court did not consider the continued existence of the restriction to be justified. After the completion of the construction work on the bridge, according to research by the WDR, over 100,000 speeding violations with fine proceedings and over 1,400 driving bans were found, 97-98% of which, according to information from the fine department, were due to the 80 km / h limit (speeds up to 127 km / h h, previous and restored speed limit plus tolerance value).

The flash system was subsequently decommissioned because almost all motorists adhere to the speed limits of 100 km / h in the direction of Wuppertal (99.6%) and 120 km / h in the direction of Neuss (99.3%).

In May 2016, the repair of the pylon began, as part of which the concrete was replaced. By the end of 2024 [obsolete] work will be carried out on the pillar that will accommodate the bridge's stay cables. Here, cracks in the reinforced concrete are grouted, the exposed reinforcement is derusted and corrosion protection is applied. On September 1, 2016, the flashing system in the direction of Neuss was put back into operation, as the construction site required it.

literature

  • Stefan Gurtmann, Markus Hamme, Gero Marzahn, Sven Sieberth: Exchange of ropes under traffic at the Flehe Rhine Bridge. In: Steel construction. Vol. 79, Issue 9, 2010, ISSN  0038-9145 , pp. 682-688, doi: 10.1002 / stab.201001356 .

Web links

Commons : Fleher Brücke  - Collection of images, videos and audio files

Individual evidence

  1. Manual road traffic census 2015 - results on federal motorways - ; bast.de, PDF document, January 26, 2017, accessed on October 16, 2017
  2. a b c A46: Concrete repair of the pylon of the Rhine bridge near Flehe. strassen.nrw.de, accessed on November 15, 2016 .
  3. a b c d Bernd Nebel: The Fleher Rhine Bridge. Retrieved November 15, 2016 (private website).
  4. Fleher Bridge . on the website of the city of Düsseldorf
  5. Technical data for the Flehe Rhine Bridge: Technical data for the Flehe Rhine Bridge (A46). strassen.nrw.de, archived from the original on July 21, 2006 ; accessed on November 15, 2016 .
  6. a b Holger Svensson: Cable-stayed bridges. 40 years of experience worldwide . Ernst & Sohn, Weinheim 2011, ISBN 978-3-433-02977-0
  7. Automobile Annoyances 1981
  8. a b c d Angela Evertz: More calm on Autobahn 46. solinger-tageblatt.de, September 28, 2013, accessed on November 15, 2016 .
  9. Stefan Felten: Stability not in danger: Fleher bridge attacked by rust. rp-online.de, May 24, 2006, accessed on November 15, 2016 .
  10. Rehabilitation of the Rhine bridge Düsseldorf-Flehe (A46) on the street NRW
  11. ^ Rehabilitation of the Fleher Bridge . In: Rheinische Post
  12. Stefan Gurtmann, Markus Hamme, Gero Marzahn, Sven Sieberth: Rope exchange under traffic at the Rhine bridge Flehe . In: Stahlbau , 79, Issue 9, Ernst & Sohn Verlag for Architecture and Technical Sciences, Berlin 2010, pp. 682–688
  13. Martin Oberpriller: Fleher Bridge: Pylon renovation from autumn , August 3, 2011, accessed on August 25, 2011
  14. Juliane Kinast: Renovation: The Fleher Bridge as a needle eye , wz-newsline.de, April 16, 2013, accessed on May 25, 2013
  15. Jan Schnettler: A46 bridge: noise protection wall for Fleher Bridge , accessed on August 25, 2011
  16. a b Christian Herrendorf: Fleher Brücke: A46: After 33 years finally noise protection , rp-online.de, December 29, 2012, accessed on May 25, 2013
  17. ^ A46: Bottleneck on the Fleher Bridge until October. Straßen.NRW, April 4, 2013, accessed November 8, 2014 .
  18. a b Press service of the state capital Düsseldorf: A 46 / Fleher Brücke: speed cameras now active in both directions. (PDF) Office for Communication Düsseldorf, October 17, 2013, accessed on November 8, 2014 .
  19. Christian Herrendorf: Noise protection is being further improved on the Fleher Bridge. Rheinische Post, March 26, 2013, archived from the original on December 3, 2013 ; accessed on November 15, 2016 .
  20. Administrative Court of Düsseldorf . Judgment of October 30, 2014.
  21. WDR local time from October 30, 2014 ( memento of the original from January 9, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.ardmediathek.de
  22. ^ Christian Herrendorf: Düsseldorf: No speed cameras on the Fleher Bridge. rp-online.de, April 24, 2015, accessed on November 15, 2016 .
  23. Volker Paulat: Fleher Bridge: Speed cameras will be back in operation from Thursday. duesseldorf.de, August 30, 2016, accessed November 15, 2016 .