Marmaray Railway Tunnel Project
This tunnel is the only one in the world connecting
two continents and has been designed to develop
important trading routes in the region.
Project
The Marmaray project has upgraded existing suburban train lines to create a direct link joining the southern part of the city across the Bosphorus Strait.
Need
Istanbul is one of the world’s biggest cities, with over 16 million people. Some two million, according to the AFP news agency, cross the Bosphorus every day via just two bridges, causing severe congestion.
Solution
• (30) 8 ft. diameter fans
• (18) 5.25 ft. diameter fans
• (9) Jet Fans
Stretching for over 8.5 miles across Istanbul and under the Bosphorus Strait, the tunnel is the only one in the world connecting two continents and has been designed to develop important trading routes in the region. The rail service will be capable of carrying 75,000 people per hour in either direction.
The tunnel ventilation fans consist of 30 double impeller fans with diameters of over 8 feet, as well as 18 single impeller units with diameters of 5.25 feet.
In addition to the supply of the ventilation systems, Woods was also integral to supervising their installation, commissioning and testing, with a permanent member of the Woods technical team based in the region for the duration of the project.
Total tunnel length
8.5 MilesNumber of fans
48
30 x Double impeller fans with diameters 2.5/2.8m. As well as 18 x single impeller units with diameters over 1.6m were supplied for this project.
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