Journal Published Online: 11 September 2007
Volume 31, Issue 1

Oedometer Consolidation Test Analysis by Nonlinear Regression



A numerical method based on least squares nonlinear regression for the evaluation of the consolidation parameters of soils from consolidation tests is presented. A model which includes the initial compression, the primary consolidation, and the secondary compression is used in the regression. This approach allows the resulting regression curve to better fit the experimental data. The method takes the settlement-time readings from the oedometer step-loading consolidation test and calculates automatically the magnitudes of the coefficients of consolidation and of secondary compression. The performance of the proposed method is accessed through consolidation tests executed on four different clay soils, which are analyzed by nonlinear regression and by the usual graphical methods. It is concluded that the proposed method gives results that are close to those obtained by the standard methods of analysis.

Author Information

Barros, Pérsio
State University of Campinas
Pinto, Paulo
State University of Campinas
Pages: 8
Price: $25.00
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Stock #: GTJ101007
ISSN: 0149-6115
DOI: 10.1520/GTJ101007