[Korea.net] An underwater sea road has been newly opened to connect the Asian and European continents.
SK Engineering & Construction (SK E&C) announced on Dec. 20 that it had successfully opened an underwater tunnel that runs under the Bosphorus Strait which divides the Turkish capital city Istanbul into Asian and European sides.
The newly-built Eurasia Tunnel which measures 5.4 kilometers–long, is the first car-only, double-story, underwater tunnel of its kind on a 14.6 kilometer-long route. The firm used a huge tunnel-boring machine (TBM) which measures 13.7 meters in diameter, 120-meters in length and weighs 3,400 tons.
The two firms, SK E&C and Turkish firm Yapi Merkezi, began excavating in 2008 when they received the order. They worked over a span of two years to complete the construction, progressing seven meters every day by digging up to 25 tons of earth and sand despite the pressure being 11-times higher than that of air as they worked as deep as 110-meters underwater.