Main bridge Bergrheinfeld
Coordinates: 50 ° 0 ′ 18 ″ N , 10 ° 11 ′ 10 ″ E
| Main bridge Bergrheinfeld | ||
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| Convicted | State Road 2277 | |
| Subjugated | Main , km 326.92 | |
| place | Bergrheinfeld , Grafenrheinfeld | |
| construction | Tied arch bridge | |
| overall length | 183 m | |
| width | 13 m | |
| Longest span | 109.5 m | |
| building-costs | € 8.8 million | |
| start of building | 2008 | |
| opening | September 18, 2009 | |
| location | ||
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The Main Bridge Bergrheinfeld is a road bridge that spans the Main between Bergrheinfeld and Grafenrheinfeld in Lower Franconia at river kilometer 326.92 . The structure has two lanes and a cycle path on both sides of the pedestrian and upstream stream.
history
After a ferry connection between Bergrheinfeld and Grafenrheinfeld existed in the 19th century, the first fixed Main crossing was opened to traffic in 1901.
The bridge had a main opening over the Main, which consisted of iron semi-parabolic girders on both sides with the carriageway below. The two side openings on the Bergrheinfeld side and four on the Grafenrheinfeld side were designed as stone arch bridges.
On April 8, 1945, German troops blew up the building. After the Second World War , makeshift repairs to the bridge followed until a new building with 1.3 m wide sidewalks on both sides and a 6.0 m wide carriageway was put into operation in 1960. It was designed as a prestressed concrete girder bridge with four openings and spans of 47 m in the middle and 40 m in the peripheral areas. Two pillars were arranged in the Main. In the longitudinal direction, the bridge had the continuous beam with a constant construction height as a structural system. A box girder cross-section was present in the transverse direction.
Due to a poor state of construction, the bridge has only been accessible for vehicles with a total weight of 10 t since 1997. In 2008 and 2009, a tied arch bridge was erected above the old bridge as a replacement, which no longer has any pillars in the shipping profile and has a 7.5 m wide lane with a usable width of 12.5 m. The building opened on September 18, 2009.
The investment costs of around 11 million euros consist of 8.8 million construction costs, 1.45 million financing costs and 0.53 million maintenance costs (in the next 25 years). Of this, the Federal Waterways and Shipping Administration and 130,000 Bergrheinfeld and Grafenrheinfeld provide 4.6 million euros. The remaining 6.2 million euros are borne by the Free State of Bavaria. The project is being implemented as part of a public-private partnership . The construction company will take over the financing, construction and maintenance for 25 years; the Bavarian state will pay its share in ten annual installments from the completion of the construction project.
construction
The 183 m long bridge consists of a western foreland bridge with 16.4 m span, an eastern foreland bridge with two openings and each 27.8 m span, and the 109.5 m wide river bridge. The structure is based on bored piles with a diameter of 1.2 m. The approach bridges are prestressed concrete structures with a two-web T-beam cross- section .
The river bridge consists of a steel arched bridge construction . However, the hangers are not arranged vertically, as usual, but diagonally and crossed. This type of bridge is also named after the inventor Nielsenbrücke and is often used in new Main bridges in Bavaria at the beginning of the 21st century. The carriageway slab is designed as a composite structure with a height of around 2.2 m with cross members spaced around 2.7 m apart. With a total width of 16.2 m, the bridge has an arched height of 17 m. The arches arranged on both sides have a constant width of 1.2 m, the height is 1.0 m.
The main bridge was installed on the Grafenrheinfelder Ufer. Then the construction with a mass of around 1000 t was pushed into its final position on January 31, 2009. Self-propelled platform vehicles and a pontoon measuring 60 m in length and 23 m in width were used for this purpose. For the production of the reinforced concrete deck slab , 9 cm thick semi- prefabricated slabs with in-situ concrete were used.
Individual evidence
- ↑ Picture of the bridge from 1901
- ↑ Norbert Biller: St 2309 relocation near Miltenberg - first PPP project in state road construction . Munich Solid Construction Colloquium, summer semester 2009 ( Memento from November 17, 2009 in the Internet Archive )
- ↑ Schweinfurter Tagblatt dated February 3, 2009
