The 260 M Maalgat River Bridge, which carries the dual carriageway national route, is described as an example of how precast and in-situ concrete can be used to overcome difficult site conditions and to create a structure of simplicity and economy. The bridge consists of two separate structures 14.6 M wide. Due to the topography at this river crossing site, the western part of the structure is on a straight horizontal road alignment, while the eastern part is on a 650 M horizontal curve. The roadway level is some 25 M above the river bed level, well above the 1 in 50 year design flood level. From a number of schemes detailed the most economical solution was found to be a four span design using in-situ hammerhead piers at 54 M centres and 44 M long precast, prestressed fish-belly box beams for the drop-in spans. The article details the bridge design and construction methods used. (TRRL)

  • Corporate Authors:

    Pithead Press Proprietary Limited

    4th Floor, Wynrop House, 91 Mooi Street
    Johannesburg,   South Africa 
  • Publication Date: 1980-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00319635
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 21 1981 12:00AM