Project Title : Eastern Tehran Sewerage Tunnel - D&B (Lot 4)

Concrete lined tunnel with oval shaped section:

-Length of section with 2,000 mm wide and 2,700 mm high: 6,479 m

-Length of section with 1,700 mm wide and 2,300 mm high: 3,125 m       

Minimum and maximum slopes of tunnel are 0.005 and 0.018    

Vertical shafts:

-Total number of shafts: 38

-Average depth of shafts: 12 m, from 6 m up to 24 m

-Internal diameter of shafts: 2,400 mm  

Tunnel excavation: 78,600 m3

Shaft excavation: 4,000 m3         

Surface stabilization: 97,700 m2

Steel works: 2,750 ton

Formworks: 110,000 m2

HDPE lining: 73,500 m2

Concrete: 25,300 m3

Employer

Tehran Sewerage Company

Engineer

Lar Consulting Engineers

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Updated Contract Price

95,000,000 USD

This is a part of Eastern Tehran waste water collection system as well as its conveyance to Shahr-e-Rey waste water treatment plant. It contains 9.6 km tunnel, 21 shafts for mechanical equipment, and 17 shafts for tunnel access.

It follows under the streets: North-Sabalan, South-Sabalan, Damavand, 30m Niro-e-havaiee, Masoudian, 2nd-Niro-e-havaiee, Pirouzi and Parastar.

This tunnel is a part of main eastern sewerage tunnel of Tehran toward Shahr-e-rey treatment plant. Total length of project is 9,700 meter.