Construction of a combined steel/concrete bowstring bridge crossing the canal parallel to the Garonne

Bow-String bridge

Year
Entreprise
BAUDIN CHATEAUNEUF
Location
Golfech (82)
Project owner
COMMUNAUTE DE COMMUNES DES DEUX RIVES
Project manager
INGC
Missions

Concrete and metal working designs

Spécificités techniques

Single span over a distance of 25.10 metres. 2 traffic lanes 3.00 metres wide, one cantilever pavement 1.40 metres wide, 1 cantilevered cycle track 2.40 metres wide.

From a structural point of view, the structure consists of:
- 2 reconstituted box girder metallic arches.
- 8 metallic bridge parts supporting the hollow-core slab, in welded reconstituted profile of variable section, comprising cantilevers supporting the pavement and the cycle track.
- 16 metallic hangers linking the bridge parts to the arches.
- a reinforced concrete hollow-core slab 25 cm thick.
- 2 reinforced concrete upturn edge beams.
- 2 reinforced concrete portal cap beams.

The specific feature of this structure is the absence of metallic tie-rods to balance the thrusts of the arches. Here this function is performed by the hollow-core slab and the 2 edge beams.

Photos: Christine CHAUDAGNE

Type
Steel and wood structures