Çayırbaşı - Ayazağa Seawater Transportation Tunnel – European Part 3.Zone Wastewater Tunnel Construction (Çayırbaşı-Ayazağa)
Scope of Work; Seawater transportation tunnel with 4.213 m length Ø2200 mm internal diameter Seawater transportation tunnel with 700m long Ø2200 mm internal diameter by pipe jacking method and TBM techniques, 3 main tunnel shafts with 9,00m external diameter, 1 seawater rising structure with 12,10 m internal diameter, 1 precast reinforced concrete seawater intake structure
Administration: İstanbul Metropolitan Municipality, İSKİ İstanbul Water and Sewerage Administration
Constructor: Depar İnşaat Ltd. Şti.
In order to supply clean water to Haliç constantly, intake structure was designed by precast reinforced concrete method from Sariyer Büyükdere. Seawater transportation tunnel with 4.213 m. long and Ø2200 mm internal diameter, excavated by Tunnel Boring Machine (TBM) and pipe jacking method with 700m long which, will transport the seawater taken from the sea to seawater rising structure center constructed in Ayazağa, was designed. Seawater which will be transported from Ayazağa Rising Structure will be transported to Kağıthane stream by Taşocağı stream and by this way it will be transported to Haliç . This project will have a great contribution to the depuration of Kağıthane stream and Haliç.