Design of I2 and F2 stations in Karaj metro line 2

Behro Consulting Engineers, as a consultant for design and supervision of the two stations of the first phase of operation of Karaj metro line 2, has played an important role in creating and constructing these two stations and achieving several years of efforts to operate the first Karaj metro line.

Introduction of F2 and I2 stations of Karaj metro line 2

Due to the fact that the E2 station has been out of the design and implementation phase due to construction and land acquisition issues, 2 stations in which Behro Consulting Engineers have been active since 2012 are introduced:

F2 station

F2 station is located at the intersection of Golshahr Street and Shahid Beheshti Boulevard in Karaj. Considering short distance between this station and Golshahr station on Tehran-Karaj line (line 5), it can play the role of connecting these two lines and have a significant amount of passenger capacity.

I2 station

I2 station is located at the intersection of Azadi Street and Shahid Beheshti Boulevard. Due to the fact that this station is located at the beginning of Karaj exit toward Tehran, it has a good attraction for passengers.

Both stations designed by Behro Consulting Engineers have the same general specifications. However, due to the location and condition of the acquired lands and restrictions on access, they inevitably have a different design.

Technical specifications of F2 and I2 stations of Karaj metro line 2

Item	Value
Station Area	14,000 m²
Cut	100,000 m³
Concrete	55,000 m³
Station Depth	18 ~ 19 m
Platform Length	160 m
Platform Width	3.8 m
Station Width (main part)	14 m
Platform Construction Method	Underground (Rib) Method
Platform Location	Under Shahid Beheshti Boulevard
Passenger Saloon Location	North Side of Shahid Beheshti Boulevard
Number of Floors of Passenger Saloon	2 (Passenger & Utilities)
Passenger Saloon Construction Method	Open Trench
Passenger Saloon Occupancy	1,500 m²
No. of Entrance	2 (Northern & Southern)
Northern Entrance	Portal – Elevator – Stairs - Escalators
Northern Entrance Occupancy	300 m²
Southern Entrance	Portal – Elevator – Stairs – Escalators - Ticket Sales Room - Passenger Gate
Southern Entrance Occupancy	450 m²
No. of Escalators	16
No. of Single - Stage Elevators	2 Elevators from street level to the south platform from the south entrance
No. of Two - Stage Elevators	2 Elevators from street level to passenger saloon in north entrance and 2 elevators from passenger saloon to north entrance
Elevators Capacity	Three 6-person and three 13-person elevators
Heating and Cooling System in Office Spaces	VRF
Ventilation of office spaces	4^th air conditioner (non-public spaces)
Station Ventilators	2 Tunnel ventilators and 1 public spaces ventilator

Design services for Karaj metro line 2 stations

Due to the fact that the contract for the Karaj metro line 2 project has been assigned to a design and construction contractor, it was necessary for contractor to cooperate with competent consultants in stations design. In this regard, basic and detail design of E2, F2 and I2 stations of this line was entrusted to Behro Consulting Engineers.

Basic design of these three stations was done in 2012. After completing and approving basic design, detail design of stations was done and approved by the employer consultant. However, due to the interruption in project, the continuation of work was postponed to 2018, when again Behro Consulting Engineers, using the design teams of architecture, structures and utilities, reviewed and submitted detail design of F2 and I2 stations according to the new situation of acquired lands, main employer and his consultant comments and by applying updated standards and criteria of project and construction of these two stations was continued based on the reviewed design.

At this stage, E2 stations was removed from the priority of design and construction due to construction and land acquisition issues, and therefore Behro Consulting Engineers at this station was terminated.

Supreme and site supervision services of Karaj metro line 2 stations

An appropriate measure taken by design and construction contractor in the Karaj metro line 2 project was that the supervision of construction operations of the stations was entrusted to the design consultants of the same station. In this regard, Behro Consulting Engineers with the establishment of supervision teams including experts in mining, civil, surveying, architecture, electricity and mechanic engineering in F2 and I2 stations and support by of design teams of structure, architecture, utilities and equipment of the head office played a role in this regard as the supreme supervision.

Currently, F2 staion is fully constructed and operational, and I2 station is under construction with 85% progress in the structure and 65% progress in the whole station. The cooperation of Behro Consulting Engineers in this sector has ended at the end of 2020.