52-year old bridge to be replaced due to structural wear and tear. Documentary following events.
LEVERKUSEN, GERMANY- There is a growing theory regarding bridge building which states: build one that lasts 100 years and requires no maintenance. This demand is especially high in the United States and therefore, the focus of bridge construction has come down to cable-stayed suspension bridges, suspension bridges, girders and slabs. Sadly though, this theory always gets rebuked when one needs to look at the increasing number and size of vehicules crossing them, plus the need to maintain them on a yearly basis to ensure that this utopian goal is realized.
With the Motorway Crossing in Leverkusen (known as the A1 Rheinbrücke), the bridge is overtaxed with vehicles and despite extensive maintenance, the state of North-Rhine Westphania, together with the cities of Leverkusen and Cologne are now working on a replacement bridge. Built in 1965, the bridge features a cable-stayed suspension design, using one set of towers and cables in the middle of the roadway with cables anchored in two different lines supporting the median, which supports a steel deck girder roadway that supports the Motorway A1. The bridge was built by Hellmut Homberg, who was the Othmar H. Ammann of bridge building, having built several crossings in the Rhine-Ruhr River regions, including structures in Duisburg, Bonn, Cologne and Emmerich. The longest suspension bridge in Germany was built in Emmerich and is credited to Homberg. The A1 Rheinbrücke provides direct service between Saarbrücken to the south and places to the north, which includes Münster, Bremen, Hamburg, Lübeck and two-lane to Fehmarn. The crossing is one of the oldest of its modern type, even though records showed that a tunnel and a basket-weaved tied arch bridge were also on the table (note: The latter can be seen in the Fehmarn Bridge, as reference). The bridge has a total length of 1061 meters; the main span has a length of 280 meters. The width of 31.7 meters includes the expansion of its original four lanes to six in the mid 1990s.
Originally slated for replacement in 2025, construction of the bridge is currently in the preliminary stages with plans to have a new structure in place by 2020. The reason: Because of the increase of traffic, both on the bridge as well as underneath with ships travelling along the Rhine, combined with weather extremities, structural weaknesses, especially in the steel, has become so great that rehabilitating the bridge has no longer become an option. Patchwork and weight limits have been conducted on several occasions, but only for the purpose of prolonging the bridge’s life until its new structure is open to traffic and the old one is removed.
Already a new bridge is designed and crews are doing soil samples to determine where to place the bridge. German public TV channel WDR (based in Cologne) is doing a documentary on this bridge project in the form of Sendung mit der Maus, a TV program for children and families with a lot of interesting facts and experiments. Televising the document in irregular intervals since January 2016, one can see how bridges are inspected, planning is undertaken for constructing the bridge, and the actual project itself. One can have a look at the progress below, but ask yourself this question:
Do you agree with this design preference? If not, how would you go about with this project if you are the planner, engineer and city official?
The Autobahn 1 is one of the oldest motorways in Europe, and the third longest motorway in Germany behind A3 and A7. The Weimar Republic proposed building a highway without intersections and traffic lights during the 1920s, yet was realized through massive construction efforts during the time of the Third Reich. The A1 was presented in 1939 but serving the Rhine-Ruhr region, as well as in segments to the north. The rest of the autobahn was completed in the 1960s and later expanded in the 1990s and 2000s. The last segment at Fehmarn is being fought by locals because of the negative environmental impact on the island through a new crossing between the island and Schleswig-Holstein as well as between the island and Denmark. The battle is ongoing and one can read more here.…..
The Rheinbrücke in Leverkusen is one of several bridges of its kind that have been targeted for deficiencies. Two other cable-stayed bridges in Duisburg and Cologne (Severin Bridge), plus the Köhlbrand Bridge in Hamburg are having the same structural issues because of too much traffic and are facing the same fate as the crossing in Leverkusen.
A bridge tour of the region along the Rhine can be found here.
Like the Mouse, the Chronicles will keep you posted on this project………