Work Resumes at Bolu

Work resumed on a major highway tunnel, which partially collapsed after a massive earthquake near the Turkish town of Bolu. Tunneling through the Bakacak Fault near the Turkish town of Bolu was halted after a massive earthquake occurred there in November 1999 and caused a 350-millimeter collapse at each face. This meant that the overall design strategy had to be reconsidered. Consultants Lombardi SA chose an articulated seismic lining design strategy as the most appropriate for the large cross-section of the Bolu tunnel, and for the excavation geometry that had already been defined. This strategy will help to mitigate the seismic risk induced to tunnels by ruptures of active faults along the alignment.


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  • Accession Number: 01011002
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 29 2005 10:02AM