Connecting Continents: Challenges of the Eurasia Tunnel in Istanbul

by Ray Castelli, P.E., (M.ASCE), Senior vice president and technical director for geotechnical engineering at WSP (formerly Parsons Brinckerhoff) in New York City.,,
David Smith, P.E., Assistant vice president at WSP, leading the Geotechnical and Tunnel Group in New York City.,,

Serial Information: Geo-Strata —Geo Institute of ASCE, 2019, Vol. 23, Issue 6, Pg. 54-59

Document Type: Feature article

Abstract: The Eurasia Tunnel, the first bored tunnel crossing of the Istanbul Strait (Bosphorus) in Istanbul, Turkey, is a site that presents many unique challenges, including very poor ground conditions, unusually high water pressures, and severe seismic demands. Although this historic waterway separating Europe from Asia has been spanned by three bridges and crossed by an immersed tube railway tunnel, the Eurasia Tunnel is the first bored tunnel across the strait, and the first roadway tunnel crossing.

Subject Headings: Water pressure | Tunnels | Railroad bridges | Developing countries | Water level | Water tunnels | Seismic tests | Seismic effects | Istanbul | Turkey | Europe | Asia | Middle East


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