The bridge, consisting of three reinforced concrete spans crosses the river where the floodplain is 2.2 km wide. Auger bored piles were socketed into shale which was overlain by sandy clays. Piers were constructed in reinforced concrete on each side of the channelised river section where the permanent flow was diverted through large temporary pipes. Abutments were of reinforced concrete closed cantilever wall type with splayed wing walls. Three 21 m simply supported reinforced concrete, voided drum-type deck slabs formed the superstructure. As deck slabs were tied together over each support expansion joints were eliminated and spans could be constructed one at a time. The construction of reinforced deck slabs was found to be much quicker than would have been the case with prestressed concrete decks. An unprecedented major flood just after the completion of the decks caused the structure to be completely surrounded by water which rose 13 m to be within 300 mm of the road surface.

  • Availability:
  • Corporate Authors:

    Publications Division, Capricorn Communications

    PO Box 1111
    Halfway House,   South Africa 

    Publicaitons Division, Capricorn Communications

    PO Box 1111
    Halfway House,   South Africa 
  • Authors:
    • -
  • Publication Date: 1989-6


  • English

Media Info

  • Pagination: p. 63-5
  • Serial:
    • Publisher: Concrete Society of Southern Africa
    • ISSN: 0379-9824

Subject/Index Terms

Filing Info

  • Accession Number: 00498129
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM