Senbay Madencilik - Kolin - Kalyon Joint venture has made good early progress on the Dudullu - Bostancı Metro Line, in Turkey, with TBM tunnel drives now fully underway .  

Two TERRATEC 6.56m diameter Earth Pressure Balance (EPB) Tunnel Boring Machines are making good progress on the latest expansion of Istanbul’s Metro system, with both machines now fully up and running and achieving good advance rates for the project.   

The new TBMs are being used by the Şenbay Madencilik-Kolin-Kalyon Joint Venture (SKK JV) – along with two other machines – on the €1.4 billion Dudullu-Bostancı Metro Line project, which runs approximately north to south under the densely-populated Anatolian side of the city (see map). The 14.2km-long line, along with its 13 new stations, will be located entirely underground at an average depth of about 30m.

Assembly of the TERRATEC S50 and S51 machines began at a central shaft site at Kayışdağı  station in early February and by early March the S50 machine had already been launched south-west toward Içerenköy station. Three weeks later, the S51 machine also began mining north-east on its journey towards Türk-iş Blokları station.  For further information please read the full press release here