Operational Site 11 (CO11) is a strategic link in the Lyon-Turin project. It is managed by the TELT (Tunnel Euralpin Lyon-Turin) and aims to build a new 65 km cross-border railway line connecting France and Italy for freight and passenger transport. The project aims to improve mobility and reduce environmental impact in the Alpine region.
Spanning 30 km between Saint-Jean-de-Maurienne and Modane, CO11 is responsible for managing and recovering excavated materials from the base tunnel. Notable features include its size, cross-functional role in relation to the other lots, and environmental ambition: over 50% of the 23 million tonnes of excavated material will be reused at various Lyon-Turin construction sites.
In this context, the GEME Lyon-Turin consortium (Gestion et Emploi des Matériaux Excavés, or Management and Use of Excavated Materials) commissioned Sixense to monitor the construction site, paying particular attention to acoustic, vibratory and atmospheric impacts.
A comprehensive and sustainable acoustic and vibration monitoring system
To meet the project’s requirements, our teams have designed, in collaboration with the GEME consortium, a large-scale environmental monitoring system. This covers the entire CO11 route, from Villargondran to Modane. The system includes:
- Acoustic and vibration sensors installed near processing platforms and inhabited areas to measure noise pollution and vibrations generated by construction activities;
- Greenhouse gas and dust sensors to continuously monitor air quality;
- Local weather stations to cross-reference environmental data with climatic conditions.
The monitoring system is designed to operate for the entire duration of the construction site.
Expertise mobilised from the design phase onwards
Prior to deployment in the field, Sixense engineers carried out acoustic and vibration modelling based on the site plans and work phases. These studies enabled environmental risks to be anticipated and the installation of equipment to be optimised. Sixense also ensures the acoustic acceptance of installations upon commissioning, guaranteeing compliance with project requirements.
A long-term collaboration with the GEME LT consortium
This project involves a Sixense multidisciplinary team working closely with the GEME Lyon-Turin consortium over the long term. This collaboration is based on trust and innovation, and serves an exemplary project in terms of environmental management.
