Oedometer Consolidation Test Analysis by Nonlinear Regression

    Volume 31, Issue 1 (January 2008)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 11 September 2007

    Page Count: 8


    Barros, Pérsio L. A.
    Associate Professor, State University of Campinas,

    Pinto, Paulo R. O.
    Associate Professor, State University of Campinas,

    (Received 15 January 2007; accepted 16 July 2007)

    Abstract

    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.


    Paper ID: GTJ101007

    DOI: 10.1520/GTJ101007

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    Author
    Title Oedometer Consolidation Test Analysis by Nonlinear Regression
    Symposium , 0000-00-00
    Committee D18