The Last Project

The Last Project
Istanbul Strait Dream Project
In the project, whose foundations were laid in 2004 and the tube assembly process under the Bosphorus was carried out in recent years, rails were added and escalators were started to be tested, electrical installation and decorative processes continue rapidly ...
'Dream The project has come to the end in Marmaray.
The 9-year dream project, the construction of which started about 1 years ago and hundreds of personnel excavated 3 million m150 of area with state-of-the-art tools day and night, uniting two continents under the sea, has the title of 'World's Deepest Immersion Tunnel' with a depth of 58 meters. When it starts, it will shorten the transportation time of approximately 1 million people, by throwing the shoes of two bridges that were once vital for Istanbul, such as Fatih Sultan Mehmet and the Bosphorus Bridge, it will relieve Istanbul traffic considerably.
In the project, which started to be built in 2004, the bottom of the strait was excavated with the help of special graders, while water-resistant special concretes were poured into the ground of these ditches, each 11 meters long, 135 meters long, 8,75 meters, prepared using 15.5 thousand tons of steel in dry pools in Tuzla. 18-tube tunnels, with a width of 11 tons, were placed.
The tunnels, which were sunk into the ditch opened at the bottom of the Bosphorus using special techniques, were perfectly clamped with the help of GPS and divers, and when the clamping process took place, they were fixed with 30 cm water absorption seals against water intrusion. With this method, after all the tunnels were sunk, the tunnels placed in the trenches were covered with 4 meters of stone blocks and sand against external dangers. Thus, the tunnels were buried in the pits dug under the strait, and their contact with water was cut.
After the integration of the tunnels, the infrastructure part of the project was completely finished after the isolative operations, while the superstructure operations were reached to the end.
Into the tunnel tunnels under the sea, the rails are laid out to be integrated with the contours. The escalators were installed and tested. The electronic infrastructure required for the healthy operation of the train system in tube tunnels was created. Security measures to be taken against possible accidents began to be implemented. A certain progress was made in the decorative processes, which will reveal the clear picture of the project.
In the project, where 440 trains are planned to work on the system, the maximum speed of the trains is limited to 100 km, while the train services are planned to be between 2 and 10 minutes depending on the peak hours. In the project, where passenger trains will be allowed to pass between 06:00 - 09:00 and 16:00 - 19:00, intercity passenger trains will be allowed to pass during the remaining hours outside these hours. Freight trains are planned to use the system between 00:00 and 05:00 at night.
Planned to open on October 90, 29, the 2013th anniversary of the Republic, the Bosphorus crossing, which sometimes takes up to half an hour due to heavy traffic, will drop down to 2 minutes when it is implemented. Travel times on other lines that are also integrated into Marmara, Gebze-Halkalı 105 minutes, 37 minutes between Bostancı and Bakırköy, 12 minutes between Söğütlüçeşme-Yenikapı and 4 minutes between Üsküdar and Sirkeci.
Thanks to the Marmaray project, which will carry the traffic load outside the Historic Peninsula and contribute to the preservation of antiquities, since the European exit is in Yedikule, an annual income of 2013 million hours will be achieved as of 15, while this figure will increase to 2015 million hours by 25. When the system is used at full capacity, it is aimed to provide 36 million hours of annual gain.
In the excavation stages of the giant project, which cost about 5 billion TL, history literally gushed from underground. Underwater research aroused great excitement around the world. Within the scope of the project, on the Asian side; Üsküdar, Ayrilikcesme and KadıköyOn the European side; During the excavations carried out in Sirkeci, Yenikapı and Yedikule, 36 sunken ships, harbors, ramparts, tunnels, king's graves from centuries ago, nearly a thousand footprints from 8 years ago and a total of 500 thousand findings and artifacts were unearthed. While most of the artifacts will be exhibited in the museum to be built in Yenikapı, some of them will be displayed in areas designed to be seen by passengers at the exit of the station.
The first immersed tube tunnel built was built in North America in 1894 for sewage purposes. The first tunnels built using this technique for traffic purposes were also built in the United States. The first of these is the Michigan Central Railways tunnel built in 1906-1910. The Netherlands was the first country in Europe to apply this technique and the Maas Tunnel built in Rotterdam was put into service in 1942. Japan was the first country to apply this technique in Asia, and the two-tube highway tunnel (Aji River Tunnel) built in Osaka was put into service in 1944.
Total Line Length: 76.3 km
Minimum Turning Radius: 300 m.
Average Station Range: 1.9 km.
Gebze-Ayrılıkçeşme Halkalı-Kazlıçeşme Number of lines between: 3
Number of lines between Ayrılıkçeşme and Kazlıçeşme: 2
Tube Tunnel Length: 1.387 m.
Superficial Metro Section Length: 63 km.
Trains transfer between cities: 8
Links to local metro lines: 4
Number of Stations: 36
Underground tunnel length: 13.6 km
Drilling Tunnel Length: 9.8 km
Immersed Tube Tunnel Length: 1.4 km
Open Close Tunnel Length: 2.4 km
Number of Underground Stations: 3 units
Number of Stations on Ground: 37 units
Station Length: 225 m. (Least)
Number of passengers in one direction: 75 thousand passengers (satte / one way)
Maximum Slope:% 1.8
Maximum Speed: 100 km / h
Commercial Speed: 45 km / h
Train Trips: 2-10 minutes
Number of Vehicles: 440 pieces (as of 2014)

Source :



    Be the first to comment