Unkelstein Bridge

Coordinates: 50 ° 35 ′ 53 ″  N , 7 ° 12 ′ 30 ″  E

Unkelstein Bridge
use	Road bridge
Convicted
Crossing of	Unkelbach
place	Oberwinter - Remagen
construction	Prestressed concrete bridge
overall length	346.6 m
width	14.9 m
Number of openings	9
Longest span	41.6 m
Construction height	2.1 m
start of building	1955
completion	1957
planner	Ulrich Finsterwalder Gerd Lohmer
location

The Unkelsteinbrücke is an elevated road that leads the federal highway 9 running between Oberwinter and Remagen along the Rhine over the Unkelbach, the local road Unkelbachtal and the tracks of the left Rhine route.

It got its name from the Unkelsteinen , a formerly feared obstacle to shipping.

Like the B9 in this area, the bridge has two lanes and a hard shoulder on both sides. It is 346.6 m long and 14.9 m wide.

It was built between 1955 and 1957 because the frequent flooding of the riverside road and the level crossing at that time were viewed as unreasonable obstacles for the increasing traffic and the narrow space between the Rhine and its bank slopes did not allow any other solution.

The bridge planned by Ulrich Finsterwalder with architectural advice from Gerd Lohmer and executed by Dyckerhoff & Widmann was one of the early prestressed concrete bridges and probably the first elevated road . Its two-cell, 2 m high box girder stands on 8 pillars arranged in the middle , a single point support that was new and unusual for the time.

It is in poor condition with extensive concrete and corrosion damage to the reinforcement and railings and deficits in the coupling joints. A repair would not be economical. Renewal is therefore planned in the long term.

Individual evidence

1. ↑ Ralph Holst, Karl Heinz Holst: Bridges made of reinforced concrete and prestressed concrete. Design, construction and calculation. 6th edition, Ernst & Sohn, Berlin 2014, ISBN 978-3-433-02953-4 , p. 133
2. ↑ Bridges are also getting old. Special publication of the LBM on "Pontesgrafie", p. 8 (PDF; 9.9 MB)