Marmaray Project, Bosphorus Railway Crossing Tunnel Construction, Turkey

Marmaray Project, Bosphorus Railway Crossing Tunnel Construction

General Directorate of Infrastructure Investments of Republic of Turkey, Ministry of Transport, Maritime Affairs and Communications, awarded the contract for the construction of the 1st phase of Marmaray Project, Railway Bosphorus Tube Crossing, Tunnels and Stations to Taisei-GAMA-Nurol Joint Venture (TGN). GAMA has a share of 12.5% within the Joint Venture.

  • Length of Project alignment: 76.3 km
  • Underground section of the alignment: (between Ayrılıkçeşme-Yedikule) 13.6 km
  • Total number of stations on the alignment: 40 (37 above ground, 3 underground stations)
  • Number of stations suitable for transfer to other railway systems: 4
  • Transfer stations for intercity trains: 8
  • Tracks between Gebze-Ayrılıkçeşme and Kazlıçeşme-Halkalı: 3
  • Tracks between Ayrılıkçeşme-Kazlıçeşme: 2
  • Number of passengers in one direction: 75,000
  • Length of immersed tube tunnel: 1,387 m
  • Deepest point in the immersed tube tunnel alignment: 60.46 m
  • Minimum curve radius in the alignment: 300 m
  • Maximum vertical track gradient: 1.8 %
  • Design speed: 100 km/hour
  • Platform length: 225 m
  • Average distance between stations: 1.9 km
  • Headway between train operations in the alignment: 2 minutes
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Location

Istanbul, Turkey

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Client

Ministry of Transport, Maritime Affairs and Communications, General Directorate of Infrastructure Investments

Contractor Icon
Contractor

Taisei - GAMA Industry - Nurol JV

Duration Icon
Project Duration

110 Months (August 2004 - October 2013)

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Project Amount

348 Million USD (GAMA portion)

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Man-Hour

8.8 Million Man-Hours