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Abstract: The Solbakk twin tube tunnel is currently the longest and deepest subsea road tunnel under excavation. The tunnel is excavated from Strand, and from Hundvåg, north of Stavanger, with a total length of 14.3 km and a maximum depth of 292 m. Marti IAV Solbakk DA has the 7.9 km tunnelling contract from Strand towards Stavanger. The excavation method is conventional drill and blast, with use of...