"Istanbul metro tunnels under way
The Gülermak-Dogusis jv is proceeding in its latest expansion of the Istanbul Metro.
Using a Lovat 6.5 m diameter mixed-face EPB-TBM, the contractor completed the first 250 Rings (including 99 before the Portal) of Prefabricated Reinforced Concrete in its drive to Bagcilar Station."
More:Tunnelling & Trenchless Construction
