A43 – Autoroute de la MaurienneDesign and construction management
Client : Société Française du Tunnel Routier du Fréjus (French Fréjus Road Tunnel Company)
Le projet
The A43 project involved building a 63.5 km section of freeway in the Maurienne valley, between :
- the Montméliant – Alberville motorway section (A43/A430),
- and the Fréjus Road Tunnel.
The section (34.5 km) built under SETEC’s supervision is the upper section of the Maurienne freeway, located in a particularly difficult mountainous area with many complex constraints:
- hydraulic constraints (flooding of the Arc and mudflows from tributary torrents),
- geological and geotechnical constraints (slope stability, boulder falls, etc.),
- urbanization of the valley,
- numerous interferences with existing structures: trunk roads, railroad lines, EHV power lines, hydroelectric reservoirs and tunnels,
This section includes :
- 2 3-lane tunnels, 3,700 m and 360 m long,
- 37 engineering structures, including 19 viaducts over 100 m long,
- 2 full diffusers and 2 half diffusers,
- 20 km of national (RN6), departmental and communal road restoration.
fortes contraintes hydrauliques et géologiques
Nos missions
The project owner, SFTRF (Société Française du Tunnel Routier du Fréjus), has awarded SETEC a main project management contract for the structures and equipment in the upper section of the project, including :
-
- a study mission including the establishment of :
- preliminary motorway project files (APA),
- preliminary and pre-project design files for non-standard engineering structures (EPOA and APOA),
- files relating to road restorations,
- tender documents (DCE),
- tender analysis reports,
- market files,
- a works supervision mission focusing in particular on :
- general supervision of works and contractors’ working drawings,
- acceptance and settlement of work,
- drawing up and handing over, at the end of the project, the “dossier des ouvrages exécutés”,
- additional tasks relating to data collection, prevention of natural and industrial hazards, network relocation by concessionaires, etc.
Nos expertises mobilisées
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