The Ile de France Interdepartmental Road Directorate (DIRIF) undertook the hazard-proofing of 22 tunnels. Among these, the underground complex of Nanterre – La Défense was a major 15 km-long construction that linked two major highways: the A14 and the A86.
Hazard-proofing work included: the building of additional emergency exits, the installation of 300,000 m2 of fire protection, the redesign of high-voltage and low-voltage networks, ventilation and centralized technical management, and the setting up and maintenance of intelligent lighting.
Close collaboration between all staff enabled complex planning that led to successful night-shift tunnel construction.
setec tpi brought its expertise to the grouping and to the DIRIF on a range of complex technical subjects such as optimising the fire-proofing of structures, the complete modeling of ventilation, carrying out the safety dossier or programming the works based on the Minimum Requirements of Operations.
Regarding structural fire resistance and ventilation, specific models were developed on two in-house developed software (Pythagore and Express’air), taking into account the underground networks’ complexity.
- 15 km of underground lanes
- 300,000 square meters of fireproofing
- Revamping of 28 air circulation plants
- 4 additional emergency exits
setec tpi co-led the engineering design (2010) and the site supervision (2010-2012). Previously, in 2009, setec undertook the preliminary design as part of the same JV.
setec’s assignment focused on:
- Technical studies
- The structures’ fire resistance
- The ventilation
- High-voltage facilities
- Works planning based on the Minimum Requirements of Operations
- Preliminary and Safety Files
- Site Operations File
- The technical coordination within the Group’s Project Management team
Client: DIRIF – Interdepartmental Directorate of Roads
Cost of projet : 110M€
Design & Construction PM JV: setec, Bouygues TP, SPIE Batignolles, Vinci Energies, AXIMA SEITHA, and COTEBA
Duration: Jan. 2010 – August 2012