Istanbul Strait Road Crossing Project

Republic of Turkey Ministry of Transportation

Design Services for Conventional Tunneling Structures:

The Istanbul Strait Road Crossing Project, also called the Eurasia Tunnel Project, will alleviate the traffic congestion in and around the city of Istanbul. With the total length of 14.6 kilometers (9.1 miles), the project will connect the cities of Kazlicesme and Goztepe on the European and Asian sides of Turkey, respectively. Construction will include Conventional Tunneling approach tunnels and cross passages, ventilation shafts, cut-and-cover structures, and a 5.4 kilometer (3.4 miles) TBM tunnel beneath the Bosphorus Strait. Once complete, the TBM tunnel will consist of a double-deck road tunnel with two lanes on each deck. Avrasya Tüneli İsletme İnşaat ve Yatırım A.Ş. (ATAŞ) was founded in 2010 by the joint venture of Yapı Merkezi A.S. from Turkey and SK E & C from Korea to fund, design and build the Eurasia Tunnel Project. Additional team members from Korea include the Kukdong Engineering & Construction Co. Ltd., Hanshin Engineering & Construction Co. Ltd., and Samwhan Corporation. Construction is projected to be completed by 2017.

Gall Zeidler Consultants (GZ) is working as a sub consultant for HNTB Corporation, the Independent Design Verifying Engineer (IDV), and provides independent design review services for the Istanbul Strait Road Crossing Project. The tunnel will be built under extreme water pressure and through a highly active seismic zone. The services include a detailed evaluation of the ground support of the Conventional Tunneling approach tunnels and cross passages.

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Kazlicesme to Goztepe, Istanbul, Turkey
2012 – Present
Approach Roads from the European and Asian sides; Two-Deck Road Tunnel
European Side Approach Road: 5.4 kilometers (3.4 miles); Istanbul Strait Crossing: 5.4 kilometers (3.4 miles); Asian Side Approach Road: 3.8 kilometers (2.4 miles)
TBM Tunnel: 147 square meters (1,582 square feet)
Quartz, quartz arenite, arkose, conglomerate, sandstone, dolomite, limestones, shale and mudstone; of the rock tunneling will be through the Trakya Formation
Approximately US $ 1.3 Billion
HNTB Corporation
Republic of Turkey Ministry of Transportation