Project Title : Eastern Tehran Sewerage Tunnel (Lot 2)

Concrete lined tunnel with oval shaped section:

-Length of section with 2,850 mm wide and 3,300 mm high: 2,300 m

Total number of shafts: 9

Length of Diversion aqueduct between Zaman-abad and Ashraf-abad: 1,200 m

Tunnel excavation: 40,000 m3

Concrete: 7,500 m3

Steel works: 1,300 ton

Employer

Tehran Sewerage Company

Engineer

Gueno Consulting Engineers

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Contract Price

22,000,000 USD

In regard to heavy traffic site plan in Tehran metropolis, special arrangement to reduce interference with city traffic, infrastructure, aqueducts, and buildings was required.

This procedure was done in a way that access wells and shafts with related organization permission, wells locations establishment, and hand worked excavation with caution to ensure that there is no conflict with infrastructure. Tunneling operation has done by means of human power and hand tools. Also waste was removed through access wells.