La Voulte railway bridge

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Coordinates: 44 ° 47 ′ 42 "  N , 4 ° 46 ′ 49"  E

La Voulte railway bridge
La Voulte railway bridge
Crossing of Rhône
place La Voulte-sur-Rhône
construction Prestressed concrete - girder bridge
overall length 300 m
Number of openings five
Longest span 56 m
start of building 1952
completion 1955
planner Nicolas Esquillan
location
La Voulte railway bridge (Ardèche)
La Voulte railway bridge

The La Voulte railway bridge ( French viaduc de La Voulte ) is a single-track railway bridge that crosses the Rhône near La Voulte-sur-Rhône in the Ardèche department . It forms a cross connection between the Givors-Canal-Grezan railway on the right bank of the Rhône (part of the Lyon – Nîmes line) and the Paris – Marseille line on the left bank, which is reached in Livron-sur-Drôme .

The La Voulte railway bridge , which was rebuilt after the Second World War and opened in 1955, was the first French prestressed concrete railway bridge .

Bridge from 1861

Viaduct de la Voulte (5711525364) .jpg

The first railway bridge at this point was built on the basis of a license granted to the PLM - Compagnie des chemins de fer de Paris à Lyon et à la Méditerranée . It was built by the company later trading as Fives-Lille . The 284 m long and 7 m wide structure consisted of five segment arches with spans of 55 m, which were supported on massive masonry pillars. In accordance with a construction method that was widespread in France at the time, each of the large arches consisted of four parallel cast-iron arch supports, which in turn consisted of a number of individual pieces screwed together. The arched gussets were filled with two rows of cast iron moldings for mounting the deck girder. The arches were stiffened in the spaces between them by iron trusses. The foundation of the pillars with caissons was similar to the procedure previously tried out on the Kehl Rhine Bridge .

In 1913 there were plans to replace the bridge with a steel structure, but these were postponed because of the First World War and finally abandoned for lack of money. In 1923 the bridge was reinforced with a reinforced concrete casing . In this way the bridge survived until it was destroyed in the Allied air raids in August 1944 during World War II .

Bridge from 1955

In 1948 the SNCF - Société nationale des chemins de fer français planned to rebuild the bridge on the existing pillars as a reinforced concrete arch bridge. However, the work had to be interrupted until 1952 for budget reasons. Nicolas Esquillan , Technical Director at the time the contractors carrying Fa. Boussiron suggested, in the area with frequent Mistral falsework to avoid, preferring instead the arc a girder bridge run. The SNCF accepted, but asked for a prestressed concrete bridge .

The bridge was built between 1952 and 1955. It is 300 m long, divided into 5 bridge fields with pillar spacing of 60 m. The span between the V-shaped supports is 56 m. The roadway girder is a three-cell, 5.50 m wide and 2.40 m high prestressed concrete box girder . The V-shaped supports also have a hollow cross-section in the upper part, while the lower part consists of solid reinforced concrete. The lane support was coated with the aid of a Bailey bridge in cantilever concreted m in portions of in each case 2.75. The structural engineer was Nicolas Esquillan .

A reinforced concrete slab bridge connects to the bridge on the right bank as a passage for the D86 road.

Web links

Individual evidence

  1. ^ Postcard in Pont ferroviaire dit viaduc de La Voulte (détruit) on patrimoine.rhonealpes.fr
  2. ↑ Auguste Perdonnet: Traité élémentaire des chemins de fer . 3. Edition. tape 1 . Garnier Fréres, Paris 1865, p. 538 ( full text in Google Book Search).
  3. ↑ Bernard Marrey: Les Ponts Modern; 20 e siècle. Picard éditeur, Paris 1995, ISBN 2-7084-0484-9 , p. 146