SOIL COMPRESSIBILITY AS MEASURED IN THE OEDOMETER

The evaluation of oedometer tests and the calculation of settlements can be based on the linear plot of the constrained modulus D with the consolidation pressure P. This plot has a U shape and presents the following advantages: it reveals the minimum value of D and the pressure where it occurs; it shows the range of pressures where the soil is strain softening; it illustrates one of the causes of the variation of cv with p; it is applicable to a wide range of soil types. The D against p model is compared with other current models of the variation of compressibility with pressure. It is in agreement with the widely accepted e against log p model but inconsistent with the exponential and linear models. The value of D which is needed for a settlement calculation can be estimated roughly from the natural dry density or, in the case of saturated soil, from the natural water content. The value of D which enters this calculation is the specific constrained modulus ds which corresponds to a consolidation pressure somewhat higher than the natural overburden pressure.(a) /TRRL/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 363-375
  • Serial:
    • GEOTECHNIQUE
    • Volume: 28
    • Issue Number: 4
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00193933
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM