n Journal of the South African Institution of Civil Engineering = Joernaal van die Suid-Afrikaanse Instituut van Siviele Ingenieurswese - Modelling soil stratification and classification from piezocone data : technical paper

Volume 43, Issue 1
  • ISSN : 1021-2019



The piezocone (CPTU) has become one of the most popular site characterisation tools used by geotechnical engineers. Although limited by the hardness of the profile to be penetrated, the piezocone is unrivalled in its ability to define the in-situ seepage regime and is the only available routine technique, other than continuous sampling, that provides a continuous profile of soil stratification below the water table. In addition, piezocone data can be analysed empirically or theoretically to give soil parameters and direct correlations for geotechnical design. This paper demonstrates a numerical procedure for analysing piezocone data for the purposes of stratification and classification. The procedure employs polynomial curve fitting techniques to identify the principal layers of the profile, which are then refined and classified according to the classification chart proposed by Jones and Rust (1982). The procedure is evaluated against a field profile from continuous sampling and is shown to give an accurate representation of sub-surface stratigraphy with the advantages of speed, cost and operator independence.

Loading full text...

Full text loading...


Article metrics loading...


This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error