Bosphorus Tube Crossing Project (Turkey)

Bosphorus Tube Crossing Project (Turkey) Sector
Railways
Project Type
Urban Railway for MRT
Project Title
The Engineering and Consulting
Services for Gebze-Haydarpasa, SirkeciHalkali Commuter Rails Upgrading and
Railway Bosphorus Tube Crossing
Construction (Marmaray)
Location
Istanbul, Turkey
Client
General Directorate of Infrastructure
Investments (AYGM)
Project Period
March 2002 – Present
Railway lines on both sides of the strait were linked through a submerged rail tube tunnel spanning the Bosphorus Problem Addressed by the Project
Services Provided
One of the most important problems of
Istanbul is the difficulty of traffic
management resulting from the rapid
population growth and the traffic increase.
Heaviest traffic can be seen on the bridges
over the Bosphorus Strait. The Strait
connecting the two continents has been
serving vehicles with the help of two
bridges and numbers of ferryboats.
However, the total capacity was still
insufficient and traffic could be gridlocked
especially during the morning and
afternoon rush hours. In order to address
these issues, the Government initiated the
Project Marmaray, which is designed to
provide railway service connecting the
area between Sarayburnu and Üsküdar
under the Bosphorus Strait
As the JV Lead, OC Global has been
providing overall consulting services,
including:
Actual Project Works
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 The Bosphorus Crossing (BC1)
including construction of the immersed
tube tunnel, bored tunnels on both
sides and 4 new stations.
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Basic design
Preparation of tender documents
Project management plan
Quality assurance system
Safety policy
Contract management
Pre-qualification questionnaire and
evaluation criteria
Pre-qualification evaluation report
Tender assistance, with documents
including evaluation criteria
Technical study reports
Construction scheduling
Special assistant to Employer related
to funding arrangements
Construction supervision and
operations management
The Project consists of 3 construction
packages, namely
 The Upgrading of the Commuter Rail
(CR1) including installation of a third
track on surface and full upgrading of
existing tracks and stations, new
signaling system, communication
system, fare collection system,
operations control center, etc.
 Procurement of New Rolling Stock
(CR2) including introduction of 44
units of 10 car trains
Marmaray tunnel officially opened on 29
Oct 2013, the Turkish Republic's 90th
anniversary. The Ottoman's dream of 150
years ago was realized with Marmaray link
between Europe and Asia, uniting the two
continents and the people.
The 63 km connecting suburban lines are
still under implementation.