Büyükçekmece Tunnel Construction, Istanbul

The project covered the excavation and primary concrete lining works of tunnel with 2800 mm inner diameter and 396 m length, the secondary concrete lining works of tunnel 2455 m, length. 57 m long shaft construction with diameter 110000 mm and also 500 mm.

Melen Bosphorus Tunnel Crossing

The project comprises of Bosphorus Crossing Tunnel with diameter 5820mm and length 5550m at 135m below sea level, 90m cut and cover tunnel (between Ortaçeşme and Bosphorus), Beykoz shaft with inner diameter 8m with depth 145m upto the base of Bosphorus.