Construction of the viaduct.

The viaduct spans two water courses (the Lez and the Lironde) and Avenue Georges Frêche where the tramway operates.

It is 568 metres long and 32 metres wide, consisting of 2 variable inertia contiguous mixed steel/concrete decks. These structures with 8 spans are supported by 2 abutments and 7 piers with their foundations on piles 1.60 metres in diameter between 22 and 31 metres depending on the support points.

The piers consists of 2 elliptical section drums.

The deck slab was constituted by means of collaborative pre-slabs.

Photos: Pierre COOK

Lez and Lironde viaduct

Year
Company of civil engineering
BOUYGUES - ZWALHEN & MAYR
Location
Lattes (34)
Project owner
ASF
Project manager
INGEROP
Missions

Civil engineering working designs 

Spécificités techniques

Complex and highly variable geotechnical context for certain support points. Design of the deck with complex pre-slabs due to the variations in centre line distances of bridge parts in the metallic carcass.

Type
Engineering structures
Cost of the work
28 000 000 € HT
40 years of cooperation in the service of construction