oa Civil Engineer in South Africa - Design and construction of the Kowyn's Pass rockfall shelter

Volume 24, Issue 9
  • ISSN : 0009-7845



The site of the Kowyn's Pass shelter is situated on the road traversing the escarpment between Graskop and Bosbokrand in the north-eastern Transvaal. The area was subject to a major fall of rock in 1973. Further falls, however, continued after the suspect area was anchored. The Transvaal Provincial Roads Authority decided towards the end of 1977 to construct a reinforced concrete rockfall shelter as a permanent and fail-safe protective measure. The design of the structure, of which construction was completed in August 1980, is discussed in the paper. A brief review of the state of the art of designing rockfall shelters against impactive loading is also presented.

Die terrein van die Kowynspas skuiling is op die pad oor die platorand tussen Graskop en Bosbokrand in die noord-oos Transvaal. 'n Groot rotsstorting het in 1973 voorgekom. Verdere stortings het egter steeds voorgekom nadat die verdagte gebied met ankers bevestig is. Die Transvaalse Provinsiale Paaie Administrasie het teen die einde van 1977 besluit om 'n gewapende beton rotsskuiling as 'n permanente en heeltemal veilige maatreel op te rig. Die ontwerp van die struktuur, wat in Augustus 1980 voltooi is, word in die verhandeling uiteengesit. 'n Kort oorsig word ook gegee van die ontwikkelingstand ten opsigte van die ontwerp van rotsskuilings vir 'n impaktiewe belastingstoestand.

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