Bicycle bridge (Konstanz)

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Coordinates: 47 ° 40 ′ 6 ″  N , 9 ° 10 ′ 27 ″  E

Bicycle bridge
Bicycle bridge
use Cyclist and pedestrian bridge
Subjugated Seerhein
place Constancy
construction Steel girder bridge
overall length 163.38 m
width 8.2 m
Longest span 70.02 m
Construction height 1.32 m to 2.97 m
height 8 m
start of building 1990
opening 1991
location
Bicycle bridge (Konstanz) (Baden-Württemberg)
Bicycle bridge (Konstanz)
Konstanz, Schottenstraße: Bicycle roundabout in front of the bicycle bridge over the Seerhein

The bicycle bridge spans the Seerhein in Constance . The bridge is used for inner-city cyclists and pedestrians. It connects the Schottenstrasse , which is dedicated to the left bank of the Rhine as a bicycle route , with the Petershauser Strasse, which is also designated on the right bank of the Rhine . It was used by an average of 7,787 cyclists on weekdays between August and December 2018.

history

Passenger ferry as a predecessor

Between the powder tower on the left bank of the Rhine and today's Constanzer Wirtshaus, a passenger ferry operated from around 1949 to 1991. The boats MS Deutschland, MS Komet and MS Niederburg were used.

Creation

The third Rhine crossing in Constance (after the Old Rhine Bridge and the Schänzle Bridge ) was built to relieve the Old Rhine Bridge in its vicinity. In September 1989, the municipal council decided to build the bridge, construction began in February 1990 and the bridge was inaugurated on June 29, 1991. In the middle of the bridge there is a 4.0 m wide carriageway for cyclists, plus 2.0 m wide sidewalks on both sides. The structure was also designed for access by ambulances and fire engines weighing up to 12 tons. It has a curved gradient in the vertical plane with a height difference of around 4 m between the abutments and the middle of the bridge. Particular attention was paid to the bridge design, especially the railings and lighting, but also the slimness of the bridge superstructure.

renovation

The surface was completely renovated in 2015.

construction

Bicycle bridge Constance

superstructure

The bridge is a 163.4 m long steel structure with three openings and spans of 46.7 m in the two edge fields and 70.0 m in the middle field. In the longitudinal direction, the continuous beam is available as a building system. The overall 8.2 m wide construction consists of a single-cell box girder cross - section with a variable construction height. The box height is 3.0 m above the pillars and 1.3 m in the middle of the river. The box webs have a constant incline, which means that the base plate width varies due to the variable carrier height. The transverse stiffeners were arranged on the outside for design reasons, they are spaced around 3.9 m apart.

Weatherproof steel was used for the superstructure , a building material rarely used in Germany. As the natural frequency of the steel bridge is around 1 Hz close to the vibrations caused by pedestrians, two vibration absorbers were placed in each bridge span .

The construction of the superstructure was carried out in the first step by pre-assembling the two bridge halves on the banks of the Seerhein. Then the two parts were floated in with ships, placed on the river pillars and abutments in an elevated state and welded together. The assembly was completed by lowering the bridge into its final position.

Substructures

The substructures have a deep foundation due to thick layers of clay with a soft to stiff consistency . The piers are supported by 8.2 m long and 4.5 m wide pile head plates, under which a tall and narrow pile frame, each consisting of 14 driven piles , is arranged. The driven piles have a diameter of 0.5 m, lengths of up to 30 m and are placed at an angle.

Web links

Commons : Fahrradbrücke Konstanz  - Collection of images, videos and audio files

literature

  • J. Berger, M. Fischer, T. Harnisch, E. Klein: Footbridge and cycle path bridge made of weatherproof structural steel over the Seerhein near Konstanz . In: Bauingenieur , 69th year, 1994, pp. 81–89.

Individual evidence

  1. ↑ Press office of the city of Konstanz: "You count" - evaluation of the bicycle counting point in Herosépark. January 7, 2019, accessed January 9, 2019 .
  2. ↑ Reiner Jäckle: The ten-pfennig ferry leaves Lake Constance. In: "Südkurier", May 16, 2018.
  3. ↑ Alt-Konstanz.de: Chronicle
  4. ↑ Jörg-Peter Rau: City is checking bridge safety again. In: "Südkurier", January 31, 2017, p. 17.
The next bridge up the river:
Old Rhine Bridge Konstanz 		Bridges over the Rhine The next bridge down the river:
Schänzlebrücke