As a critical part of Istanbul’s railway chain, Istanbul Otogar-Bağcılar Rail Mass Transportation System is the largest rail system implemented by a Turkish Contractor in a single contract. The project involves the construction of the main line, electromechanical works and rolling stocks supply. This mega mass transportation metro line has a total length of 25,9 km which was constructed by 4 TBMs with a circular cross-section of 6,50 m each. Single line length of the double track tunnel system in this project is 47,4 km. Total line has 16 stations and the line is connected with stations that intersect each other at two points: Otogar-Bağcılar-Kirazlı and Kirazlı-İkitelli-Başakşehir rail systems.
Location Istanbul / TÜRKİYE
Client Istanbul Metropolitan Municipality, IETT General Directorate
Length of the Tunnels 26.234 m - EPB - TBM 3.740 m - NATM 909 m - 2 Viaducts 2.195 m - Cut & Cover 46.000 m - Total Length of the Single Track
Tunnel Diameter TBM - 6,50 m NATM - 7,80 m
No. of Stations 16 - 5 Stations constructed with Diaphragm Wall Top & Down Construction Method
Earthworks 5.888.513 m³ - Excavation 2.069.000 m³ - Fill
Concrete 914.788 m³
Segment 18.995 Rings (5 Panels + 1 Key)
Shoring Works 139.060 m² - Diaphragm Wall 35.423 m³ - Shotcrete 149.058 m - Bored Pile 700.553 m - Anchorage
