Giant projects will merge with iron networks: The Third Bridge, 3rd Airport and Marmaray projects will be linked by a 62-kilometer railway. Köseköy of the Ministry of Transport, Maritime Affairs and Communications Halkalı The 152 kilometer part of the 3 kilometer high-speed train, which includes the 62 giant project, was initiated by TCDD.
TCDD, about 62 kilometers of 3. Bridge-3. Airport Halkalı It will hold a tender for the preparation of the railway's projects. Thanks to the railway to be built in accordance with high-speed trains, three giant projects will be linked together.
The project work is expected to take 1,5 years. Within the scope of the study, ground studies and expropriation plans will be prepared. According to the project, which offers the opportunity to reach the third airport by rail, the high-speed train will enter a 700-meter tunnel on the European Side after leaving the third bridge. Unlike the ring road, the train, which will continue on its route, will stop by the third airport. Then Odayeri, returning to Başakşehir via Damascus Halkalıwill go to. Railway, Halkalıwill be connected to the Marmaray project, which is undergoing improvement of suburban lines.
History of Marmaray Project
The first railway tunnel to be crossed by the Bosphorus was prepared as a draft in 1860. The figure shows the type of tunnel floating on the columns and floating in the sea and the proposed cross sections.
The idea about a railway tunnel under the Istanbul Strait was first proposed in 1860. But where the tunnel planned to pass under the Bosphorus would pass through the deepest parts of the Bosphorus, it would not be possible to build the tunnel above or under the seabed, using old techniques; and so this tunnel was planned as a tunnel over the columns built on the seabed in the design.
Such ideas and ideas were further evaluated in the following 20-30 year-round and a similar design was developed in 1902; in this design, a railway tunnel passing under the Bosphorus is envisaged; but in this design, a tunnel is placed on the seabed. Since then, many different ideas and ideas have been tried and new technologies have given more freedom to design.
Under the Marmaray Project, the technique to be used for crossing the Bosphorus (immersed tube tunnel technique) 19. was developed from the end of the century. The first immersed tube tunnel, built in 1894, was built in North America for sewage purposes. The first tunnels built for traffic purposes using this technique were also built in the United States. The first is the Michigan Central Railroad tunnel, built during the 1906-1910 years. In Europe, the Netherlands was the first to implement this technique; and the Maas Tunnel, which was built in Rotterdam, was opened in 1942. Japan was the first country to implement this technique in Asia, and the two-tube road tunnel (Aji River Tunnel) built in Osaka was commissioned in 1944. However, the number of these tunnels remained limited until a robust and proven industrial technique was developed in 1950; After the development of this technique, the construction of large-scale projects in many countries began.
The desire for the construction of a railway public transport link between the east and west of Istanbul and passing under the Bosporus has gradually increased in the early 1980 years, and as a result the first comprehensive feasibility study was conducted and reported. As a result of this study, it was determined that such a connection was technically feasible and cost effective and the route we saw in the project today was chosen as the best one among a number of routes.