Progress in the construction of the nineteen bridge crossing of the Seto inland sea between Honshu and Shikoku islands in Japan is reviewed. The bridges have been positioned in three separate routes across the sea in an earthquake susceptible area of typhoon winds. Of the bridge now under construction, nine of the structures are among the world's twenty longest spans. For the 10 km long central crossing over navigational channels five viaducts are used to carry six highway lanes and a twin track railway across intermediate islands. Undersea concrete filled hollow steel caissons bridge foundations are being constructed in 50 M deep water on a carefully levelled seabed generally of weathered granite. All bridge towers are formed of steel box sections erected by a self climbing crane. Cables for suspension bridges are prefabricated 127 wire strands which the Japanese claim are quicker and easier to erect than aerial spinning. However, environmental Anchorage restriction forced aerial spinning to be used on the bridge. Two of the suspension bridges share a common anchorage with two cables from each bridge crossing on the anchorage to balance opposing forces. (TRRL)

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 23-27
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00389245
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1984 12:00AM