Company News

4/5/2016

Taisei Corporation Cooperates with Mitsubishi Electric for Marmaray Project

While Taisei Corporation conducted assembly and commissioning of bored tunnel, immersed tube and all electromechanical systems for Marmaray BC1 Bosphorus Sub-Sea Tunnel, Mitsubishi Electric was in charge of high tech automation equipment, engineering and design, project design, software programming, hardware assembly, commissioning, training and service support...

Widely appreciated for its large scale construction projects in the world, Taisei Corporation has joined forces with Mitsubishi Electric, global automation giant, for Marmaray Project which runs under the Bosphorus to connect Asia and Europe via the deepest immersed tube tunnel in the world. While Taisei Corporation conducted assembly and commissioning of bored tunnel, immersed tube and all electromechanical systems for Marmaray BC1 Bosphorus Sub-Sea Tunnel, Mitsubishi Electric was in charge of high tech automation equipment, engineering and design, project design, software programming, hardware assembly, commissioning, training and service support.  

Taisei Corporation Electro Mechanics Manager Bülent Özince: "We are especially proud of performing the assembly of the deepest immersed tubes in the world in the waters of Bosporus marked with counter-currents"

Underlining that the two leading trademarks joined forces for Marmaray BC1 Bosphorus Sub-Sea Tunnel Project, Taisei Corporation Electro Mechanics Manager Bülent Özince provides the following information about the construction of Marmaray tunnel conducted by Taisei-Gama-Nurol consortium and the outstanding services offered by Mitsubishi Electric as an added value to the project:

“Taisei Corporation was responsible for opening bored tunnels between the stations, undertaking construction and assembly of immersed tube elements and construction of Sirkeci deep station as well as procurement and assembly of electromechanical components for tunnels and stations for Marmaray BC1 Bosphorus Sub-Sea Tunnel Project. We are especially proud of performing the assembly of the deepest immersed tubes in the world in the waters of Bosporus marked with counter-currents. Given the fact that the historic peninsula is densely constructed, undertaking deep excavations for Sirkeci station required significant expertise. We are quite pleased to ensure that highly safe electromechanical systems were successfully assembled and commissioned in line with international challenging standards for Marmaray stations and tunnels.”

Indicating that Mitsubishi Electric understood the requirements of Marmaray project as well as safety criteria quite satisfactorily, Bülent Özince explained the reasons for cooperating with Mitsubishi Electric for the project: “Since Marmaray BC1 tender was designed in the form of “design-perform” principle, first of all, it was necessary to conduct engineering analyses successfully. Mitsubishi Electric conducted those analyses as required.  During the next phase, we chose the most reliable products compatible with the requirements of the project. At that point, Mitsubishi Electric was chosen because of its outstanding reference projects.”

Contributions of Mitsubishi Electric to Marmaray 

Mitsubishi Electric Turkey Factory Automation Systems was in charge of “Station Information and Management System Project” for Marmaray as an infrastructure project. Mitsubishi Electric offered high tech automation equipment, engineering and design, project design, software programming, hardware assembly, commissioning, training and service support services for Marmaray BC1 Bosphorus Sub-Sea Tunnel Project. Conducting control and monitoring activities for electromechanical equipment in the tunnel, stations, ventilation buildings and generator buildings, Mitsubishi Electric realized the scenarios required for feeding the energy systems of Marmaray by means of two TEIAS and two generator groups at both sides. 

Designed with 100 percent back-up by Mitsubishi Electric, the control system is made up of 37 thousand hardware monitoring and check points, 107 thousand software monitoring and check points, 750 operator monitor control pages and 100 kilometres of communication cables. The control system which operates 24/7 basis enables operators to contact the train operator at the scene and determine the air flow direction for eviction of passengers and smoke in case of any fire in the tunnel. Thus, the system provides guidance to the operator to initiate the defined ventilation scenario easily by minimising the error probability.