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İstanbul Ayvalıdere Rainwater Drainage Tunnel Boring Starts
New İstanbul mayor Ekrem İmamoğlu inagurate the start of boring. İmamoğlu named the Tunnel Boring Machine after Ms Gülseren Yurttaş. She died in a work accident in a previous tunnel project of Melen Çayı in 2007.
Tunnel is 4 meter in diameter and 4.674 meter long. Tunnel has 3 shafts. TBM is 190 tons and 75 meter long. TBM has 25 cutters. TBM will go 300 meter every month. Tunnel will cost 80 million Turkish Lira (₺).
Tunnel is 50-60 meter underground and follow road above to not damage houses.
Project is run by İstanbul Water and Kanalization Works (İSKİ).
cover tunnel photo by: Matt Brown from London, England / CC BY
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İSKİ is special. İSKİ supported a company to build first Turkish tunnel boring machine. Arcan Makina (ARM) buılt first Turkish TBM some years ago. Güçlü İnşaat used it to bore a tunnel in İstanbul.
Arcan Makina was a small company. Very small company. Because of German and China invasion, it bankrupted and closed unfortunately.