Volume 36, Issue 1 (January 2013)

    Laboratory Evaluation of Coefficient of Radial Consolidation Based on Pore-Water-Pressure Dissipation and Settlement

    (Received 5 March 2012; accepted 19 September 2012)

    Published Online: 2012

    CODEN: GTJOAD

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    Abstract

    Modified and standard Rowe consolidation cells were employed to investigate the behaviour of soft clays during vacuum assisted radial consolidation. Degree of consolidation (DOC) and the back calculated value of coefficient of radial consolidation (ch) based on measured settlement and excess pore-water-pressure (uw) dissipation curves were compared. The DOC and (ch) based on pore water pressures are shown to be less than those based on settlements. The vacuum pressure-total surcharge ratio (VSR) is found to be an important parameter controlling the rate of the consolidation. Moreover, the coefficient of radial consolidation (ch) based on conventional oedometer testing could not accurately predict the consolidation behaviour of soft soils under varying VSR. Finally, a semi-empirical model incorporating the relationship between VSR and a modified coefficient of radial consolidation is introduced.


    Author Information:

    Indraratna, Buddhima
    Professor of Civil Engineering, Director, Centre for Geomechanics and Railway Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW

    ARC Centre of Excellence for Geotechnical Science and Engineering,

    Kianfar, Kourosh
    Candidate, Centre for Geomechanics and Railway Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW

    ARC Centre of Excellence for Geotechnical Science and Engineering,

    Rujikiatkamjorn, Cholachat
    Senior Lecturer, Centre for Geomechanics and Railway Engineering, Faculty of Engineering, Univ. of Wollongong, Wollongong City, NSW

    Centre of Excellence for Geotechnical Science and Engineering,


    Stock #: GTJ20120032

    ISSN: 0149-6115

    DOI: 10.1520/GTJ20120032

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    Author
    Title Laboratory Evaluation of Coefficient of Radial Consolidation Based on Pore-Water-Pressure Dissipation and Settlement
    Symposium , 0000-00-00
    Committee D18