News & Infos Tunnel intersection at İbrahimağa station
The metro stations are single or triple track tubes, 250m long, connected by 7 cross cuts.
News & Infos Shafts
Diameters 11-13m, depths 35-45m. In case of ground water or large alluvial deposits, the shafts are constructed with bored piles and stiffening rings, otherwise with shotcrete lining.
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Metro Istanbul Kadıköy-Kartal

Detailed design of underground constructions
  • 21.6 km long, 16 underground stations
  • Total costs: US Dollar 750 million
  • Construction period: 2005-2011
Under construction:
NATM technique:
- 0.5 km single track tube (full section 36 m²)
- 3.0 km plattform tunnel (full section 62 m²)
- 0.8 km connecting tunnel (full section 60-70 m²)
EPB technique:
- 7.5 km single track tube (diameter 6.5 m)

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