Azad water conveyance tunnel

Project Info
  • Client: Iran Water & Power Resources Development Co.
  • Main Contractor: Farab- Nimrokh JV
  • Location: Kurdistan, Iran
  • Scheme: EPC
  • Scope: Water tunnel by TBM (Tunnel Boring Machine)
  • Progress: Under construction
  • Specification:
    • Type of tunnel: Mechanized concrete tunnel for water transfer
    • Capacity: 5 m3/sec. passing flow
    • Main volume:
      • Precast concrete segment: 54,200 pieces in 9,034 rings, each ring consist of 6 segments
      • Concrete volume: 35,000 m3 including lining and grouting
      • Reinforcement: 1,800 tons
      • Open excavation volume: 550,000 m3
      • Tunnel excavation volume: 120,000 m3 in hard and karstic rock, clay and sand
      • Length: 10,840 m
      • Diameter: Excavation diameter is 3.74 m and finishing diameter after segment fitting will be 3 m
      • Depth of tunnel (over burden): 150 m
      • Type of TBM: an EPB (Earth Pressure Balance)

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