Viaduc de l'Arrêt Darré
Coordinates: 43 ° 11 ′ 50 " N , 0 ° 11 ′ 29" E
| Viaduc de l'Arrêt Darré | ||
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| use | Highway bridge | |
| Convicted |
 Autoroute A 64
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| Crossing of | Arrêt-Darré | |
| Subjugated | D 817 | |
| place | at Lhez | |
| construction | Prestressed concrete - box girder bridge | |
| overall length | 512 m | |
| width | 20.4 m | |
| Number of openings | six | |
| Longest span | 100 m | |
| start of building | 1984 | |
| opening | 1987 | |
| planner | Play Batignolles Alain Spielmann |
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| location | ||
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The Viaduc de l'Arrêt Darré leads the Autoroute A 64 near Lhez in the Hautes-Pyrénées department in the Occitanie region over the Arrêt-Darré river and the D 817 départemental route .
description
The motorway bridge has two lanes and a narrow hard shoulder in each direction of travel. It is 512 m long and 20.4 m wide. The roadway describes a curve with a radius of 1250 m and has a gradient of 3.78% in a westerly direction. Your five openings have pillar spacing of 60 + 4x100 + 52 m.
The prestressed concrete - pillars have a hollow cross section. They consist of 2.75 m high prefabricated parts that were stacked on top of one another with the help of a crane and then braced to the foundation.
The carriageway girder consists of a single-cell, haunched prestressed concrete - hollow box with a trapezoidal cross-section, the height of which decreases from 6.3 m at the pillars to 2.9 m in the middle of the field. The 20.4 m wide carriageway slab protrudes to the side. The box girder was first built on the individual pillars in cantilevered construction from glued prefabricated segments, then the row of horizontal girders was tilted according to the longitudinal profile and concreted together to form a continuous girder . The projecting deck slab was then concreted in.
In 2010 it was discovered that bats ( lesser horseshoe bats ) had colonized the interior of the bridge.
history
When the bridge was put out to tender, Jacques Mathivat presented a design with a short central pylon and flat inclined stay cables, for which he coined the term précontrainte extradossée in a French article published in 1987 . In a later English publication he called it extradosed bridge , a term that is now used for extradosed bridges worldwide.
Web links
- Viaduc de l'Arrêt-Darré. In: Structurae
- Construction du viaduc de l'Arrêt Darré, de 1985 à 1987. Video by Cinema Vivant Tarbes. Realization Gérard Riffarth, on YouTube (French, 11:59)
Individual evidence
- ^ C. Servant, Y. Sidibe: Viaduc de l'Arrêt Darré. In: IABSE structures = Constructions AIPC = IVBH Bauwerke , Volume 11, 1987, Issue C-40: Structures in France , p. 22 ( http://doi.org/10.5169/seals-20369 )
- ^ ASF, 2 ans après on naturemp.org
- ↑ Jacques Mathivat: Évolution récente des ponts en béton Précontraint. In: IABSE reports = Rapports AIPC = IVBH Reports , Volume 55, 1987, pp. 318–329, 328 ( http://doi.org/10.5169/seals-42743 )
- ↑ Jacques Mathivat, WF Crozier: Recent developments in prestressed concrete bridges. In: FIP Notes , No. 2, 1988, pp. 15-21