The Marmaray Project, which is defined as a hundred-year project, was built to withstand an earthquake of magnitude 9. Istanbul is approximately 20 kilometers away from the North Anatolian Fault Line extending from the east to the southwest of the Islands in the Marmara Sea. Therefore, the project area is located in an area that requires a major earthquake risk consideration.
It is known that many similar types of tunnels are exposed to earthquakes similar to the expected magnitude in this region and they survived without major damage. Kobe Tunnel in Japan and Bart Tunnel in San Francisco, USA are examples of how robust these tunnels can be built.
In addition to the existing data, additional information and data were collected from the geological, geotechnical, geophysical, hydrographic and meteorological studies and surveys in the Marmaray Project, which was the basis for the design and construction of tunnels constructed using the latest and most modern civil engineering technologies.
Accordingly, the tunnels within the scope of this project have been designed to withstand the highest earthquake expected in the region.
The latest experiences from the seismic event in 1999 in the Izmit - Bolu region were analyzed and these experiences form part of the foundations on which the design of the Istanbul Railway Bosphorus Tube Crossing (Marmaray) Project is based.
Some of the best national and international experts participated in the studies and evaluations. the earthquake in Japan and the United States District was built previously in many similar tunnel and therefore especially Japanese and American experts, the specifications must be met in the design of the tunnel for the development of the series, the scientists worked in close cooperation with and specialists in Turkey.
Turkish scientists and experts have been working extensively on identifying the characteristics of potential seismic events; and so far, based on all the information collected and historical data Izmit in Turkey - Bolu obtained from 1999 events in the region, including the most recent data has been analyzed and used.
Japanese and American experts assisted in this data analysis study and supported relevant activities; these experts have also included all of their extensive knowledge and experience in the design and construction of seismic and flexible joints in tunnels and other structures and stations within the scope of the specifications to be met by the Contractors.
Large earthquakes can cause serious damage to large infrastructure projects if the effects of such earthquakes are not adequately considered within the scope of the design. Therefore Marmaray Project used the most advanced computer-based models and America, the best experts from Japan and Turkey, the design process katılmışd.
Thus, the team of experts, who form part of the Avrasyaconsult organization, will be assisted by contracted designers and experts to ensure that in the event of the worst-case scenario (ie, a very large earthquake in the Marmaray region) this event cannot be turned into a disaster for the people passing through or working in the tunnels. and provided his advice on this issue.
The upper blue part of this map is the Marmara Sea, which is connected to the Black Sea and the central part of the Bosphorus. The North Anatolian Fault will be the center of the next earthquake in the region; this fault line extends in the east / west direction and passes approximately 20 kilometers south of Istanbul.
As can be seen from this map, the southern parts of the Sea of Marmara and Istanbul (upper left corner), is located in one of Turkey's most active earthquake zones. Therefore, tunnels, structures and buildings are constructed in such a way that no destructive damage or damage occurs in case of an earthquake.