[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/marmaray-tunnel-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/marmaray-tunnel-wikipedia\/","headline":"Marmaray Tunnel – Wikipedia","name":"Marmaray Tunnel – Wikipedia","description":"From Wikipedia, the free encyclopedia Rail passage under the Bosporus This article is about the Marmaray tunnels themselves. For the","datePublished":"2016-10-20","dateModified":"2016-10-20","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/2\/2c\/Building_the_first_intercontinetal_subway_-_panoramio.jpg\/220px-Building_the_first_intercontinetal_subway_-_panoramio.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/2\/2c\/Building_the_first_intercontinetal_subway_-_panoramio.jpg\/220px-Building_the_first_intercontinetal_subway_-_panoramio.jpg","height":"145","width":"220"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/marmaray-tunnel-wikipedia\/","about":["Wiki"],"wordCount":1212,"articleBody":"From Wikipedia, the free encyclopediaRail passage under the BosporusThis article is about the Marmaray tunnels themselves. For the commuter railway service, see Marmaray.The Marmaray Tunnel (Turkish: Marmaray T\u00fcneli) is a 13.5\u00a0km (8.4\u00a0mi) long undersea railway tunnel in Istanbul, Turkey, beneath the Bosporus strait, linking Kazl\u0131\u00e7e\u015fme, Zeytinburnu in Europe with Ayr\u0131l\u0131k\u00e7e\u015fmesi in Asia. The tunnel consists of two single track tunnels with three underground railway stations: Yenikap\u0131, Sirkeci and \u00dcsk\u00fcdar.The Marmaray Tunnel was opened to passenger traffic on 29 October 2013. In March 2019 the overground part of the Marmaray project were completed and normal train traffic, including commuter (entire line), YHT and freight services started to run through the tunnel. The tunnel is the deepest immersed tube tunnel in the world.Table of ContentsHistory[edit]Operations[edit]Engineering[edit]References[edit]External links[edit]History[edit] A barge lowering segments of the tunnel, observed on the Bosporus in 2007.The construction of a railway tunnel beneath the Bosporus strait dates back to 1860, when Sultan Abdulmejid I first proposed an undersea crossing of the strait. The project was proposed again in 1892, under Abdul Hamid II, when French engineers planned such a tunnel. The plan was never realized.Plans to build a modern trans-Bosporus tunnel were proposed in 1997, based on a feasibility study ten years prior, and the necessary capital secured in 1999. Preparatory works on the project began in 2001. Construction began in May 2004. The tunnel was constructed by a Turkish-Japanese consortium led by the Taisei Corporation. Tunnel construction was completed on 20 October 2008, and rails were added in 2009. The completion of the project was delayed due to archeological discoveries near Sirkeci, with artifacts dating back 8,000 years.[1]Test runs began on 6 August 2013, and operations began 29 October, with a ceremony in \u00dcsk\u00fcdar.[2]Operations[edit] A Marmaray train at Yenikap\u0131 station.The Turkish State Railways own the tunnel, while trains are operated by TCDD Ta\u015f\u0131mac\u0131l\u0131k. Both tunnels are electrified with 25 kV AC 50 Hz overhead wire.The western portal to the tunnel is in Kazl\u0131\u00e7e\u015fme, Zeytinburnu on the European side of the city, just west of Fatih. Out of the three tracks that approach the west portal, two of them enter the tunnel, while the third track continues to Sirkeci station.The eastern portal to the tunnel is located in Ayr\u0131l\u0131k\u00e7e\u015fmesi, Kad\u0131k\u00f6y on the Asian side of the city. Ayr\u0131l\u0131k \u00c7e\u015fmesi station is located right outside the east portal. After Ayr\u0131l\u0131k \u00c7e\u015fmesi station, the two tracks connect to the Istanbul-Ankara railway, from Haydarpa\u015fa station, and continue towards Gebze and Anatolia.As of November 2017, TCDD Ta\u015f\u0131mac\u0131l\u0131k operates 164 round-trips between Kazl\u0131\u00e7e\u015fme and Ayr\u0131l\u0131k \u00c7e\u015fmesi at intervals from every 5 minutes during peak hours, to 10\/15 minutes during off-peak hours. In total, the Marmaray tunnels see 328 scheduled trains daily.Engineering[edit]The undersea section of the Marmaray tunnel is the deepest immersed tube tunnel in the world, with its deepest point being 60\u00a0m (200\u00a0ft) below sea level. This section of the tunnel is 1,387\u00a0m (4,551\u00a0ft) long and consists of 11 sections lowered via barges on the Bosporus. Eight of these sections have a length of 135\u00a0m (443\u00a0ft), two of them have a length of 98.5\u00a0m (323\u00a0ft) and one with a length of 100\u00a0m (330\u00a0ft). These immersed tube tunnels are connected via bored-tunnels on both sides.[3]Before the tunnel sections were lowered, a portion of the ground underneath the Bosporus needed to be strengthened. This was done by lowering concrete columns 4 to 10 meters long which stabilized the area. The tunnels were assembled on dry-docks in Tuzla and tested off B\u00fcy\u00fckada. After testing, they were dragged by tugboats to their positions at the southern end of the Bosporus.[3]Once the tunnels were lowered into place, they were covered with fill, de-watered and sealed.[4]Tunnel boring machines (TBMs) were used to drill the tunnels under land. The under land section of the tunnel consists of two tube tunnels, each with a single track. Walkways are present within each tube.References[edit]External links[edit]"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/marmaray-tunnel-wikipedia\/#breadcrumbitem","name":"Marmaray Tunnel – Wikipedia"}}]}]