Kavacık - Paşabahçe - Beykoz Wastewater Tunnel and their Connections Construction (Beykoz-İstanbul)
Scope of Work; Wastewater Tunnel with 7.075,00 m length Ø2200 mm external diameter, Sectioned branch Tunnel with 898m length Ø 1200/1800 mm, 12 main tunnel shafts with 7,50 m. internal diameter, 9 branch tunnel shafts with 5,50m internal diameter
Administration: İstanbul Metropolitan Municipality, İSKİ İstanbul Water and Sewerage Administration
Constructor: NTF İnşaat Ticaret Ltd. Şti.
Within the project scope which recover İstanbul Beykoz coast from wastewater polution, by evaluating the geological data all along the tunnel route geotechnical engineering models related to the tunnel designing, was prepared. In the light of these data, according to the tunnel excavation and construction techniques by Tunnel Boring Machine, engineering calculations of the tunnel precast segment were made and precast segment lining projects were prepared. For branch tunnels, engineering calculations were made in accordance with the conventional tunnel excavation and construction techniques and projects that are related to the tunnel lining were designed.
All along the tunnel route excavation, architectural and reinforced concrete project were designed for 12 main tunnel shafts and 9 branch tunnel shafts.