NATM Tunnel Construction within the Scope of the Project Marmaray BC1

The Marmaray Tunnel is a railway tunnel located under the Bosphorus in Istanbul, Turkey. It links Kazlıçeşme on the European side and Ayrılıkçeşme on the Anatolian side. It is the deepest immersed tunnel in the world. It was put into service with the Marmaray suburban train line on October 29, 2013. Within the scope of Marmaray BC1 Project, excavation-support works and interior lining works of turnback tunnels in Yenikapı region and NATM tunnels in Namık Kemal Caddesi and excavation-support works and final reinforced concrete lining works of CNV tunnels, the east, north and south pedestrian stair tunnels of Sirkeci Station, final lining works and concrete  works of the east and west shafts were carried out by our company.

Soner Temel Mühendislik has added value to critical technical points for the project, especially its works at Sirkeci Station, method choices and application methodology, and played an important role in the target of the project opening on October 29, 2013. Tunnels were dug in geological formations containing clay and sand, under embankment and old structures in the historical peninsula of Istanbul, mostly with the umbrella arch method and the ground tunneling experience of Soner Temel Mühendislik without harming the surface structures.    

Location TÜRKİYE
Client Ministry of Transport, General Directorate of Infrastructure Investments, General Directorate of Railways, Ports and Airports Construction (DLH) Marmaray Regional Directorate
Project Scope
  • Excavation-support works and interior lining works of the tunnels