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The Bosphorus Rail Tunnel Project


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Author V Tellioglu and A Unlutepe


The Bosphorus Rail Tunnel Project, located in Istanbul,
Turkey, aims to provide a Euro-Asian rail link, via an immersed tube tunnel
crossing the Bosphorus Strait, along which will run all commuter, freight and
intercity passenger trains of Turkish State Railways (TCDD), as well as the
future extension to the European rail network. The total length of upgrading and
new railway construction will be approximately 76 km. The main structures
include the immersed tube tunnel; mechanised shield tunnels; new Austrian
tunnelling method (NATM) tunnels; cut-and-cover, at-grade and retained-cut/fill
structures; and some service structures. This paper discusses Phase 1
implementation of the project, one of the major transportation infrastructure
projects in the world today, whose varied structures present stimulating
engineering and construction challenges.