Rahmede viaduct
 Rahmede viaduct
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| use | Federal highway 45 | |
| underpassed | Rahmede , Landesstrasse 530 | |
| location |
Lüdenscheid , North Rhine-Westphalia
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| construction | beam bridge | |
| overall length | 453 m | |
| broad | 31.75m | |
| Longest span | 104 m | |
| height | about 75 m | |
| start of building | 1965 | |
| completion | 1968 | |
| closure | 2021 | |
| position | ||
| coordinates | 51° 14′ 58″ N , 7° 37′ 13″ E | |
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The Rahmede viaduct is a 453 meter long bridge of the federal motorway 45 . It lies between the motorway junctions Lüdenscheid -Nord and Lüdenscheid. The structure spans the valley of the Rahmede , a tributary of the Lenne , north of Lüdenscheid and the state road 530 . The route of the motorway is curved in the area of the bridge .
The structure has been permanently closed since December 2, 2021 due to damage to the structure, repairs are not possible.
story
The viaduct was built between 1965 and 1968. Traffic planners predicted in the 1960s that 25,000 vehicles would use it every day. At the end of the 2010s there were 64,000 vehicles, including 13,000 trucks. In 1960 the permissible total truck weight was 32 tons and the axle load was 10 tons, in 1968 it was 38 tons. In 2021, a maximum of 40 tons and 11.5 tons axle loads were permitted.
Due to deficiencies, the bridge had to be replaced by a new building as part of the expansion of the federal autobahn 45. In the main bridge inspection in 2011 , the structure received a condition grade of 3.0 (“insufficient”). A timely repair should be carried out within a period of one year at a cost of 18.67 million euros. The measure was rejected for cost reasons with reference to the planned new building.
In 2014, the State Office for Road Construction in North Rhine-Westphalia decided to build a new replacement for 43.5 million euros. In the same year, the maximum speed was reduced, a distance requirement of 50 meters and a ban on overtaking for trucks were introduced, and heavy transport (up to 60 tons), which required a permit, was blocked. The planning service was awarded in 2015 and the start of construction is scheduled for 2017. In 2016, there were initial plans for the new bridge, which were presented to the building and traffic committee of the city of Lüdenscheid on September 7, 2016 by the State Office for Road Construction in North Rhine-Westphalia. Accordingly, the environmental impact study was completed in the first quarter of 2016 and the planning should be completed in mid-2018. The start of construction was scheduled for 2019 and the construction period should be four years. At that time, a lateral displacement of the superstructure of a part of the structure was planned. Planning costs of three million euros had already been incurred.
The main bridge inspection in 2017 again resulted in a condition grade of 3.0. The Federal Ministry of Transport did not commission a structural recalculation to determine any necessary upgrading measures because the new building was in the planning stage. After being postponed from 2017 to 2019, the start of construction for the new viaduct was postponed again, now by seven years to 2026. The continuation of planning for the new building was stopped at the beginning of 2017. The new replacements for the Kattenohl and Brunsbecke bridges were given higher priority.
On December 2, 2021, during a structural inspection using a laser scan , horizontal deformations ( dents ) were found on the 1 cm thick web plate of a main girder, which affect the load -bearing capacity of the bridge. The bridge was closed the same day. An emergency reinforcement of the web plates should enable car traffic again. On January 7, 2022, the Autobahn GmbH des Bundes announced that, in addition to the damage already discovered, cracks were also found on the side members and that the bridge can therefore no longer be used. It is to be replaced by a new building within five years. On February 7, 2022, Federal Transport Minister Volker Wissing announced that the bridge should be blown up; the technical requirements for this are in place.
construction
The approximately 75 m high building is a steel composite construction and has a common superstructure for both lanes . The building system in the longitudinal direction is a continuous beam with six fields and a total span of 453 m. The spans are 53 m, 64 m, 84 m, 104 m, 84 m and 64 m. The 31.75 m wide cross-section consists of two 5, 0 m high, steel main girders, which are connected to each other every 2.5 m by cross girders. The crossbeams are framework constructions and carry the roadway slab made of reinforced concrete.
See also
- Salzbach Viaduct - closed on June 18, 2021 due to acute danger of collapse
web links
- The Autobahn: Viaduct Rahmede A45, Status December 13, 2021. (pdf; 2 MB) In: autobahn.de. December 15, 2021.
itemizations
- ↑ A45: Investigations on the Rahmede viaduct are ongoing. In: autobahn.de. December 3, 2021, retrieved January 8, 2022 .
- ↑ Expansion of the A45 between Dortmund and Giessen. (No longer available online.) In: autobahn.de. Formerly in the original ; retrieved 8 January 2022 . ( page no longer available , search in web archives )
- ↑ a b c d Jan Schmitz: A45 closure due to Rahmede viaduct: New construction repeatedly postponed - since 2014. In : wa.de. 8 December 2021, retrieved 8 January 2022 .
- ↑ Preservation draft TB Rahmede. (pdf) In: buergerinfo.luedenscheid.de. Retrieved January 26, 2022 .
- ↑ The Autobahn: Viaduct Rahmede A45, Status 12/2021. (pdf; 623 kB) In: guten-tach.de. December 3, 2021, retrieved January 8, 2022 .
- ↑ A45: full closure between Lüdenscheid and Lüdenscheid-Nord. In: autobahn.de. 2 December 2021, retrieved 8 January 2022 .
- ↑ A45: work on the Rahmede viaduct has begun. In: autobahn.de. December 9, 2021, retrieved January 8, 2022 .
- ↑ A45: No more cars on the Rahmede viaduct - new construction should come soon. In: autobahn.de. January 7, 2022, retrieved January 8, 2022 .
- ↑ Ursula Freundt, Sebastian Böning: Influence of changed traffic routing during upgrading measures on building stresses. (pdf; 6.8 MB) In: Reports of the Federal Highway Research Institute, bridge and civil engineering. Issue B 97. Carl Schünemann Verlag, Bremen, November 24, 2013, p. 14 , accessed January 8, 2022 ( ISBN 978-3-95606-058-8 . Reproduced at hbz-nrw.de ).