Bendorfer Bridge

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Coordinates: 50 ° 24 ′ 37 ″  N , 7 ° 34 ′ 28 ″  E

A48 Bendorfer Bridge
Bendorfer Bridge
Convicted Federal motorway 48
Crossing of Rhine
place Koblenz - Bendorf
Entertained by State Office for Mobility Rhineland-Palatinate
construction Prestressed concrete - girder bridge
overall length 1029 m
width 30.86 m
Longest span 208 m
vehicles per day > 60,000
building-costs 27.1 million DM
start of building March 15, 1962
completion August 13, 1965
opening August 16, 1965
construction time 3.5 years
planner Ulrich Finsterwalder , architect Gerd Lohmer
location
Bendorfer Bridge (Rhineland-Palatinate)
Bendorfer Bridge
Road map of the Koblenz area
Bridges koblenz.png
Number 2 is the Bendorfer Bridge
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The Bendorfer Bridge , also called Rheinbrücke Bendorf , leads the A 48 motorway between Koblenz and Bendorf over the Rhine .

The 1029 m long bridge begins at the northern city limits of Koblenz, crosses the two arms of the Rhine and the northern end of the island Graswerth , which belongs to the municipality of Niederwerth , and ends at the junction Bendorf / Neuwied. The four-lane motorway bridge also has a pedestrian and cycle path on the north side. It is one of the most frequented bridges in the Koblenz region after the Europabrücke with more than 60,000 vehicles per day.

The Bendorfer Bridge, planned by Ulrich Finsterwalder with architectural advice from Gerd Lohmer and completed in 1965, marks an important stage in the development of bridge construction. The prestressed concrete construction was able to prevail successfully against the steel construction, which had previously dominated the market for long-span bridges. In the cantilever with CFT prestressed concrete bridges also created the necessary am Rhein large could spans without disturbing the waterway bridge. With a span of 208 m over the navigation channel of the Rhine, the Bendorfer Bridge had the largest span of all prestressed concrete girder bridges in the world.

history

The construction of today's A 48 began as early as the late 1930s. Some sections of the route were already under construction, for example at Koblenz-Bubenheim , where the never-used abutments of a bridge have been preserved. Due to the outbreak of the Second World War , the construction work was stopped.

After the war, the construction of the motorway was resumed in the 1950s, with some changes to the route. In 1960, the crossing of the Rhine between Sankt Sebastian and Kesselheim on the west side and Bendorf on the east side was tendered in two lots . At the express request of the neighboring communities, a pedestrian and cycle path was provided on the north side of the bridge, which is rather unusual for motorway bridges. Many well-known steel construction companies and construction companies took part in the competition. The design that Ulrich Finsterwalder, chief designer and personally liable partner of Dyckerhoff & Widmann KG , worked out with architectural advice from Gerd Lohmer was successful . A consortium of the companies Dyckerhoff & Widmann and Grün & Bilfinger was commissioned with the execution of Lot I (bridging the main stream to Graswerth Island), Lot II (flood bridge from Graswerth Island) was assigned to Wayss & Freytag .

Construction work began on March 15, 1962. The river bridge with the largest span was completed on August 21, 1964 and the rest of the bridge on August 13, 1965, after a total construction time of over three years, and opened to traffic 3 days later. The construction costs at that time amounted to 27.13 million DM , which today corresponds to around 54.9 million euros .

At the time of construction, the structure was the girder bridge made of prestressed concrete with the largest span in the world. It held this record until 1972, when it was replaced by Japanese licensed buildings. It still holds the record in Germany today.

At the end of the 1980s, the structure had to be extensively renovated due to a large number of insufficiently grouted tendons . Another renovation is planned for 2019 and 2020. Even so, the bridge is likely to be nearing the end of its lifespan and a replacement will be necessary between 2030 and 2035.

Construction and construction

The Bendorfer Bridge is a beam bridge made of prestressed concrete and consists of the 524.50 m long river bridge from the left bank of the Rhine to Graswerth (Lot I) and the 505 m long eastern foreland bridge from Graswerth to the Bendorfer Bahnhof (Lot II), which is on a 2, 5 m wide dividing pillars are divided with an expansion joint . Both bridges on a total of 16 massive piers have two separate superstructures made of hollow boxes for the two directional carriageways and the continuous beam as a structural system in the longitudinal direction .

The span of the river bridge is 43.00 + 44.35 + 71.00 + 208.00 + 71.00 + 44.35 + 43.00 m. In the transverse direction, the total of 30.86 m wide superstructures are designed as single-cell prestressed hollow boxes with a haunched construction height . The height above the river pillars is 10.45 m and in the middle of the main span spanned by 208 m is 4.4 m. There is a moment joint there. The two river pillars are only 2.80 m thick, as the 208 m wide main stream opening is flanked by only 71 m wide peripheral fields. As a result, the cantilever arms of the main opening are clamped relatively rigidly in the edge fields, so that only small bending moments act on the pillars. The river piers were provided with sheet pile walls to protect them from scouring .

The spans of the foreland bridge, which is curved in areas in the ground plan, are 47.85 + 54.00 + 56.00 + 58.00 + 60.00 + 94.00 + 52.00 + 41.50 + 41.00 m. In the transverse direction, the superstructures are designed as single-row, parallel- belt prestressed concrete box girders. The construction height is between 5.0 m and 3.3 m at the abutment, depending on the span .

The main stream opening was erected in cantilever with the help of four front carriages (two each for the two superstructures). Each front-end wagon, including its payload (fresh concrete, tendons, reinforcement), weighed 100 tons and was completely protected from wind and weather. With a heater it was even possible to work down to minus 7 ° C. The cantilever construction began on both sides of the left river pillar with the production of the cantilever arms in the form of two balance beams. After the cantilever arms were completed, the front-end wagons were moved to the right-hand river pillar. After the cantilever arms on the right-hand side had been built, the two outer front wagons, now supported by a pylon bracing, were also used to build the superstructures in front of Graswerth Island.

The western approach bridge as well as the bridge parts over Graswerth and the Bendorfer train station were concreted with the help of a stand scaffold .

  • Substructure and river piers

  • Bridge over Graswerth

  • Road with footpath and bike path

  • Bendorfer Bridge, aerial photo (2016)

See also

literature

  • Ulrich Finsterwalder, Herbert Schambeck: From the Balduinstein bridge over the Lahn to the Bendorf bridge over the Rhine. In: Der Bauingenieur , 40th year, issue 3 from March 1965, pp. 85–91
  • Ulrich Finsterwalder, Herbert Schambeck: The prestressed concrete bridge over the Rhine near Bendorf, lot I; Design and calculation. In: Beton- und Stahlbetonbau , Volume 60, Issue 3 from March 1965, pp. 55–62
  • Erich Lippert: The construction of the Rhine bridge Bendorf, lot I. In: Concrete and reinforced concrete construction , 60th year, issue 4 from April 1965, pp. 81–92

Web links

Commons : Bendorfer Brücke  - Collection of Images

Individual evidence

  1. ↑ Ulrich Finsterwalder, Herbert Schambeck: From the Lahn bridge Balduinstein to the Rhine bridge Bendorf. In: Der Bauingenieur , 40th year, issue 3 from March 1965, pp. 85–91
  2. ↑ Leonardo Fernández Troyano: Bridge Engineering: A Global Perspective . Colegio de Ingenieros de Caminos, Canales y Puentes, Thomas Telford, London 2003, ISBN 0-7277-3215-3 , pp. 426 ( limited preview in Google Book search).
  3. ↑ Bendorfer Autobahn Bridge (A48): Renovation will take months. Article by Rhein-Zeitung.de from October 23, 2017
  4. ↑ Major project A 48: This is what initial plans for a new bridge look like. Article by Rhein-Zeitung.de from October 26, 2017
  5. ↑ For comparison: The Nibelungen Bridge in Worms has 6 m thick pillars; its main span of 114.2 m is flanked by 101 m wide fields.
The next bridge up the river:
Schiffbrücke (1945 destroyed)
Pfaffendorfer Bridge 		Bridges over the Rhine The next bridge downstream:
Urmitzer Railway Bridge