25072019-Ligne 15 sud

Grand Paris Express: an exceptional concreting on line 15 South

Infrastructures Division

The largest civil engineering concreting of Lot T2B of line 15 South of the Grand Paris Express took place on 16 July 2019 on the 1001P Salengro ring road in Champigny-sur-Marne. 

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