Design and construction of soil nail wall on the basis of unsaturated soil mechanics

The effective stress concept for unsaturated soils was applied to the design and construction of up to a 8.9m high soil nail wall excavation as part of an expressway construction project on the western side of Adelaide, South Australia. As the excavation depth is permanently above the water table, the long-term behaviour of the retained stiff clays are unsaturated and a component of the shear strength is governed by soil suction. Some of the design and construction challenges encountered for the subject soil nail walls are: (i) the effect of clay swelling on the design of nail head and shotcrete facing; (ii) the adverse impacts of sand lenses and the nearby existing sewer trenches on wall excavation; and (iii) the variability of soil nail bond stresses encountered in clays and sandy soils. This paper describes the design and construction aspects of the soil nail wall structure.


  • English

Media Info

  • Pagination: 1024-8
  • Monograph Title: Proceedings of the 13th Australia New Zealand Conference on Geomechanics Perth, Western Australia, 1-3 April, 2019

Subject/Index Terms

Filing Info

  • Accession Number: 01714797
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • ISBN: 9780994626103
  • Files: ITRD, ATRI
  • Created Date: Aug 26 2019 11:51AM