Brief Description

Since 2009, BolandPayeh has considered the fundraising approach in his policy. In this regard, the contract of Tehran Subway, Lines No. 3 and 4 was signed between Tehran Urban and Sub-Urban Railway Co. (TUSRC) as the Client and BolandPayeh with a financial Joint as the Contractor.

The relevant contract is a Mega-Project with 58 sub-projects and more than 80 work fronts. BolandPayeh responsibility in this Barter Contract is to start with traffic studies and end by tracking of the tunnel and stations except signaling services.

Technical Specifications

BolandPayeh services in the Line No. 3 include engineering, procurement and construction of 15 kilometers tunnels,15 kilometers tracking, 12 underground passengers’ stations, 10 ventilations buildings, one T-shaped metro lines’ intersection and 3 drain networks.

For the Line No. 4, BolandPayeh designed, procured and built 2 kilometers of tunnels,12 kilometers of tracking, 4 underground passengers’ stations, 2 T-shaped metro lines’ intersections, 2 ventilation buildings and 2 train’s lubritorium.

New Austrian Tunneling Method (NATM) were chosen for tunneling and execution of piles and ribs network for the stations. In order to solve time consuming disadvantage of NATM methodology, BolandPayeh developed an executive plan for the hydraulic form operation in an optimized manner.

As a result, BolandPayeh successfully achieved an average advancement rate of about 30 meters per day in tunneling (including excavation and temporary and permanents structures) and about 80meters per day for tracking which are beyond what other companies have achieved in Iran. BolandPayeh could successfully reduce the construction duration of underground stations to one third using the construction of the middle slab (between ticket hall and passengers’ platform), on the soil body of passenger platform.

The main unique structure of this contract in the Line No. 3 is Mowlavi passengers ‘station. This station is the intersection between Lines No. 3 and 7, beside the main agricultural channel in south of Tehran, called Robat Karim, and the main waste water network in southern Tehran with an average depth of 70 meters under the ground.

The main unique structure of this contract in the Line No. 4 is intersection structure between Mehrabad Airport Specific Line and Line No. 4 with a free width of 50 meters and an average depth of 40 meters under the ground.