ABSTRACT
The French side of the Lyon-Turin base tunnel will produce more than 22 million tons of excavated material and will require 5 million m3 of concrete and 1.5 million m3 of backfill. These volumes, combined with strong logistical constraints due to the Alpine context, led the project owner, TELT, to set up a strategy of Management and Use of Excavated Materials (MUEM) in the early 2000s to implement a sustainable development policy.
A probabilistic modelling of uncertainties associated with the MUEM was developed by ALLTI, the consortium for design and site supervision, made up of WSP, Arcadis, Lombardi, Amberg and TTS. This modelling revealed an acute sensitivity of the supply chain regarding the uncertainties carried out by the various operational sites producing and consuming materials. CO11 contract includes a design of infrastructures and organisation allowing an adaptability to the conditions encountered. A risk-sharing mechanism has been set up to encourage valorisation of excavated materials. Based on a concept of determining quantity, the CO11 contractor commits on its production, transformation, and storage capacities.
