Langon Railway Bridge (Gironde)
Coordinates: 44 ° 33 ′ 33 ″ N , 0 ° 15 ′ 5 ″ W.
| Langon Railway Bridge (Gironde) | ||
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| Crossing of | Garonne | |
| place | Langon (Gironde) | |
| construction | Steel - girder bridge | |
| overall length | 210 m | |
| Number of openings | three | |
| Pillar spacing | 66.5 + 77.0 + 66.5 m | |
| start of building | 1854/1996 | |
| completion | 1855/1998 | |
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The railway bridge Langon (Gironde) leads the Bordeaux-Sète railway in Langon in the Gironde department in the French region Nouvelle-Aquitaine on the Garonne .
Today, created from 1996 to 1998 steel - girder bridge replaced the built 1854-1855 wrought iron plate girder bridge at the same location.
A few meters from her is the Langon road bridge , a modern prestressed concrete bridge that replaced a lattice girder bridge that led from the center of the village to the other bank. This in turn was the replacement for an original suspension bridge .
Bridge from 1855
The Bordeaux-Sète railway line (then still written Bordeaux-Cette ) of the Compagnie des chemins de fer du Midi , founded by the brothers Émile and Isaac Pereire in 1853, crossed the Garonne near Langon on a bridge to which a viaduct with 32 stone arches was connected led over the flood bed on the right bank.
The 210 m long bridge had two parallel wrought iron solid wall girders with a construction height of 5.5 m, which were connected by cross girders and stiffened with diagonal braces and supported by the abutments and two stone river pillars . The spacing between the pillars was 66.5 + 77.0 + 66.5 m. The railroad tracks were laid on cross girders halfway up the solid wall girders.
The design of the bridge went back to Eugène Flachat , who shortly before had designed the Asnières railway bridge , which also crossed the Seine from Paris to Saint-Germain-en-Laye , which was also laid by the Péreire brothers . It was the first wrought iron and at the same time the first box girder bridge in France. According to their model, but no more than closed box girder bridges, a. built the bridge in Langon and the Moulins (Allier) railway bridge. Like the bridge in Asnières, the bridge in Langon was built by Ernest Goüin's company (later Société de Construction des Batignolles and now Spie Batignolles ).
Bridge from 1998
In the course of expanding the line to 160 km / h, the bridge built in 1855 was no longer sufficient for the increased loads and was therefore replaced by a steel girder bridge between 1996 and 1998 . It has essentially the same dimensions as the old bridge. Since the railroad traffic could not be completely interrupted, technically speaking there are two bridges standing next to each other for one track each. Both bridges have two slightly haunched solid wall girders .
Behind the bridge, the route still uses the original viaduct over the flood bed.
Web links
Individual evidence
- ^ Marcel Prade: Ponts & Viaducs au XIXe Siècle . Brissaud, Poitiers 1988, ISBN 2-902170-59-9 , p. 239