COLLAPSE SETTLEMENT IN COMPACTED SOILS

Research into collapse settlement in compacted soils is described, with special reference to recent cases in southern Africa where collapse settlement occurred in road embankments following wetting of the soil. The laboratory work described consisted largely of oedometer tests over a range of saturations, on soils from four of these road embankments, compacted in a mould especially designed for this purpose. The influence of variations in initial dry density, compaction moisture content, applied pressure and particle size distribution, is discussed. Examination of these four soils and two naturally occurring collapsing soils with the electron microscope showed fundamental differences in the structure of natural and recompacted soils. The Bulletin concludes with a brief review of the principles of soil compaction. /Author/

• Corporate Authors:

  National Institute for Transport & Rd Res, S Afr

  P.O. Box 395
  Pretoria, Transvaal,   South Africa 
• Authors:
  • Booth, A R
• Publication Date: 1977

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 34 p.

Subject/Index Terms

• TRT Terms: Collapsible soils; Dry density; Electron microscopes; Embankments; Ground settlement; Moisture content; Oedometers; Saturated soils; Soil compaction; Soil compaction test; Testing; Wetting
• Uncontrolled Terms: Particle size distribution
• Old TRIS Terms: Compaction tests
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00165530
• Record Type: Publication
• Report/Paper Numbers: CSIR Rsh Rept. 324, NITRR Bulletin 13
• Files: TRIS, ATRI
• Created Date: Jan 13 1978 12:00AM