The paper describes an innovative method for the construction of multispan cable-stayed bridges, the main feature of which is a large steel truss with a length of at least two spans. The truss is launched underneath the bridge deck, and the launching is aided by flotation tanks, which, when submerged, produce a constant uplift force at the end of the cantilevers. The tanks are withdrawn into the truss to bypass the piers. Installation of the stay cables occurs simultaneously with the production of the concrete deck. This requires temporary anchorage of the stay cables to the top chord of the steel truss. The method can also be used for the construction of long, multiple-span concrete box girder bridges if the geometry of piers and superstrucure is suitable for such a method.

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  • Accession Number: 00622579
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jun 30 1992 12:00AM