In order to guarantee support for 15 years, 8 areas weakened by convergence were reinforced by several mobile formwork tools.
With a radius of 5.30 m for 140 tons, these tools have made it possible to concretize the vault per 10 m long stud.
In total, 343 m in counter vault and 333 m in vault were consolidated by blocking rings.
Congratulations to all the teams involved in these major underground works projects !
Discover the installation of the vault formwork tool in pictures !
Consortium : Eiffage Génie Civil, Spie batignolles, Ghella, CMC di Ravenna, COGEIS SPA
Contracting authority : TELT Lyon Turin
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