oa Civil Engineering = Siviele Ingenieurswese - Lateral support for cuts and fills on National Route 1, Section 21, between Lynnwood Road and Rigel Avenue

Volume 17, Issue 3
  • ISSN : 1021-2000



The section of National Road Route 1, Section 21, between the Lynnwood Road (Scientia) and Rigel Avenue interchanges on the eastern outskirts of Pretoria is being widened as part of the Gauteng Freeway Improvement Project (GFIP) at present being implemented by the South African National Roads Agency Limited (SANRAL).

For the widening in cuts the options were to trim the existing slopes in a thin sliver to the top of the cut or to construct a small retaining structure at the base. Space constraints and environmental considerations precluded the sliver option and it was decided that reinforcement with soil nails would be the most cost-effective option.

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