The TBM excavating the Lyon metro Line B extension broke through into the future site of Oullins Station early this month. This milestone ended the 1.4km Gerland to Oullins run, of which 972m were bored by the TBM.
French contracting JV Sytral engineered the excavation of 70,000m3 of material and the laying of 536 segmented rings. The Rhone-traversing drive took five months to complete.
The tunnel began a three-week shutdown following breakthrough for technicians to check its condition and move it across the station. When this has been completed, the TBM will excavate the remaining 300 meters to Orsel Street over approximately 10 weeks where it will then be dismantled.
“This is a milestone and a highlight for the teams who worked on the project and will carry on until completion,” said Sytral.
