Herrenknecht
Bosporus underpass with about 15,000 tubbing segments
On August 22, 2015, in front of the eyes of the Turkish Prime Minister Ahmet Davutoglu, a mix-shield pierced the target shaft wall on the European side of Istanbul exactly according to schedule. The emergence of the drilling giant was a great success of engineering for the building contractors, the Turkish-South Korean joint venture Yapı Merkezi and SK Engineering & Construction, after 16 months of driving beneath the Bosporus Strait.
Starting with a slope of 5 % from the Asian side in April 2014, the 3.34 kilometer long underpass for the two-story Eurasia road tunnel that is 106 m below the...
