This paper presents aspects of the design and construction of the Bang Na to Chonburi expressway, which will be a 55km long inter-urban extension to Bangkok's existing expressway system. When completed, the expressway will be the world's longest viaduct. The design-and-build contract for the work was awarded in 1995, and was a tremendous challenge to all its participants. The complete structure had to be constructed within 42 months, so that on average 9700 square m of bridge deck had to be built every week. To achieve this extraordinary rate, it was decided to use a structural system based on externally post-tensioned precast box girder segments with dry joints. The expressway will be opened to traffic in eight stages, and a closed toll collection system will be used. The state-of-the-art design of the viaduct was shaped by restrictions, introduced by the working and operating environment, and by economic constraints. The structure will meet high aesthetic, economical, and technical expectations. It was especially difficult to coordinate the design in its early stages. This paper discusses: (1) the design of the viaduct as a whole and its foundation, columns, and superstructures; (2) the test of one span; (3) the casting yard; (4) construction; and (5) the advantages of the contract used. For the covering abstract see IRRD E104152.

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  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Publication Date: 1999


  • English

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  • Accession Number: 00788367
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2841-5
  • Files: ITRD
  • Created Date: Mar 3 2000 12:00AM