The last part of the northern roof slab of the structure was to be built in a single block. From 6 a.m. to 8 p.m., 125 trucks took turns to provide the 924 m³ of concrete needed to pour this 465 m² and 2 m thick slab.
This operation, which is unusual in the underground construction industry, also involved 50 people, as well as 2 pump trucks for an average pouring rate of 75 m³ per hour. It went perfectly well, and highlighted the ability of the teams of the Eiffage Génie Civil - Razel Bec Group to meet major challenges on a cramped site in the middle of residential areas and crossed by the departmental road 4 crossing Champigny and frequented by some 15,000 vehicles per day.
Congratulations to the teams for what is currently a new concrete record on this lot ordered by the Société du Grand Paris. The next step: the tilting of the departmental road to the north to free up the southern right-of-way in order to carry out the balance of the moulded walls and the roof slab of the structure.
Photos Credit: Eiffage Branche Infrastructures - Razel Bec