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A giant dives deep and brings Europe and Asia together at the Bosphorus

The following images, photographs, illustrations, videos and media or "A giant dives deep and brings Europe and Asia together at the Bosphorus" include visual details and information about this product or case study.

After 16 months of tunnelling, on August 22, 2015 a tunnel boring machine from Herrenknecht successfully crossed under the Bosphorus. Well-wishers on the breakthrough celebration included the Turkish Prime Minister Ahmet Davutoğlu (mid), vice chairman Erdem Arıoğlu from Turkish construction company Yapı Merkezi (right) and company founder and Chairman of the Board of Management from Herrenknecht, Dr.-Ing. E.h. Martin Herrenknecht.

The cutting wheel of the 13.66m diameter TBM briefly after the breakthrough in the target shaft on the European side of the Bosphorus. The different changeable excavation tools like disc cutters and scrapers placed on the 6 main spokes can be recognized easily.

The Mixshield type Herrenknecht TBM S-762 (Ø 13.66 m) was assembled and extensively tested at the Herrenknecht AG plant in Germany. One of the technical innovations is an accessible cutting wheel for safe replacement of the excavation tools under atmospheric conditions.

The technically extremely complex challenges make the construction of the 3.34 kilometer long tube for the Eurasia Tunnel one of the world's most demanding tunnelling projects. Thanks to the optimal cooperation of all project partners, tunnelling was completed on schedule on August 22, 2015.

Eurasia Tunnel

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