Grand Paris Express project promoter Société du Grand Paris has announced that the first tunnel boring machine (TBM) on the scheme has started its drive.
The TBM – named Steffie Orbival – will drive a 2,178m section of Line 15 at 20m below ground from the Champigny Plateau shaft to Villiers-sur-Marne.
The tunnel forms part of the Grand Paris Express scheme which will see 200km of new metro built in Paris by 2030 and Line 15 is expected to be the first to open with some sections in operation by 2024.
According to Société du Grand Paris, Steffie Orbival is expected to progress at a rate of 12m per day but will experience challenging ground conditions with varied geology and pass close to the RER E line on the drive. The TBM will drive at a gradient from 20m below ground level at start to 30m below ground level at Villiers-sur-Marne.