Aqueduct bridge over the Yonne

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Coordinates: 48 ° 16 ′ 9 ″  N , 3 ° 13 ′ 42 ″  E

Aqueduct bridge over the Yonne
Aqueduct bridge over the Yonne
Official name pont-aqueduc de Villeperrot
use aqueduct
Convicted Aqueduc de la Vanne
Crossing of Yonne
place Villeperrot
construction Stamped concrete - arch bridge
overall length 1493 m
Number of openings 162
Longest span 40 m
Clear width 40 m
Arrow height 8 m
start of building 1866
completion 1874
planner Eugène Belgrand
location
Aqueduct bridge over the Yonne (Bourgogne-Franche-Comté)
Aqueduct bridge over the Yonne

The aqueduct bridge over the Yonne ( French pont-aqueduc de Villeperrot ) leads the Aqueduc de la Vanne over the Yonne , i.e. the approximately 156 km long aqueduct that was built by Eugène Belgrand between 1866 and 1874 to improve the water supply in Paris and is still in operation.

description

The aqueduct bridge is about 2.5 kilometers southeast of Pont-sur-Yonne near the small community of Villeperrot. It crosses (from west to east) the D58 département road, four tracks running alongside the river, a narrow embankment road, the Yonne and after 160 m the D606, where it ends with a large curve in a long straight that finally ends in the fields below disappears from the ground.

On the aqueduct bridge is the 3737-meter-long siphon with which the aqueduct crosses the Yonne valley. The siphon consists of two parallel cast iron pipes with an inner diameter of 1.10 meters. It begins far to the east of the bridge at an inlet structure on the D23 and ends in the west on the steep high bank of the Yonne. It has an arrow height of 40 m.

The bridge structure itself is 1,493 meters long and originally consisted of 162 arches. The bridge over the Yonne was formed by three arches with a clear width of 30 + 40 + 30 m, on which there is an arch over the shore road with a clear width of 30 m and an arch over the railway tracks with a clear width of 22.60 m on the left bank connected. The remaining arches were divided into 45 arches with a clear width of 6 m, 21 with 7 m, 80 with 8 m, 10 with 12 m and an arch over the then RN6 , a modest chaussée, with 30 m clear width.

The construction of the main bridge was very modern for its time. The arched gussets , which were mostly closed until then , were opened and replaced by round arches supported by narrow panes, which support the bridge table with the two cast-iron tubes. Since there was no usable building material in the whole area apart from river sand, the bridge was built from béton aggloméré according to the Coignet system , i.e. from rammed concrete . It should be one of the first larger bridges made from this material.

The D58 and the larger bridge required for it were built later. During the Second World War , the arches over the Yonne were bombed in 1940. During the reconstruction, the external appearance of the bridge was retained, but the original wide arches were broken up into two narrow arches standing parallel to each other, which are only connected by a few bridges. The course of the river was shifted slightly to the east, so that only one pillar was left in the river. The embankment was moved under the now completely dry western arch and the next arch that had become free was used for a second railway line. When modernizing and expanding the RN6, today's D606, to a three-lane road, a girder bridge was used instead of the previous arches.

See also

literature

  • Eugène Belgrand: Les Eaux Nouvelles . In: Les travaux souterrains de Paris . tape 4 . Dunod, Paris 1882 ( digitized on Gallica ).
  • Emploi de concrete aggloméré (system Coignet) in the construction de l'aqueduc de la Vanne . In: Annales des ponts et chaussées. Mémoires et documents relatifs à l'art des constructions et au service de l'ingénieur . 1870, p. 402-405 ( digitized on Gallica ).

Web links

Commons : Aqueduct Bridge over the Yonne  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Pont-sur-Yonne takes its name from a bridge that has existed since the Middle Ages, but not from the aqueduct
  2. ^ Eugène Belgrand: Les Eaux Nouvelles. Pp. 200, 206
  3. ↑ In the case of a siphon, the arrow height indicates the difference in height between the pipe at the top and the bottom
  4. ^ Eugène Belgrand: Les Eaux Nouvelles. P. 209
  5. ↑ Emploi de béton aggloméré (system Coignet) in the construction de l'aqueduc de la Vanne
  6. ↑ Giles Souchet: Les Ponts-Aqueducs
  7. ↑ Historical photo of the bridge
  8. ↑ Google streetview