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    Volume 41, Issue 1 (January 2018)

    A Framework for Interpretation of the Compressibility Behavior of Soils

    (Received 18 March 2017; accepted 6 July 2017)

    Published Online: 2018

    CODEN: GTJODJ

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    Abstract

    This paper aims at the development of a regression-aided analytical framework for modeling and analyzing the compressibility behavior of over-consolidated soils. A three-parameter rectangular hyperbola function (3P-RH) was proposed for describing the void ratio–effective stress relationship. Validation of the 3P-RH was carried out by a compiled database gathered from the literature. Simple analytical solutions were then proposed for determining the compressibility curve variables including the compression (Cc) and recompression (Cr) indices and the preconsolidation pressure (Pc), which are intended to replace the current subjective graphical method by providing consistent results. Equations for the preconsolidation pressure were derived in accordance with four common graphical constructions covering various levels of geometrical complexity (slightly to highly subjective). A probabilistic comparison among the graphical constructions was then carried out. Furthermore, a sensitivity analysis with respect to the proposed preconsolidation pressure functions was considered to evaluate the influence of the 3P-RH fitting parameters (α and β) on the preconsolidation pressure value. The proposed 3P-RH compressibility model accompanied by the suggested analytical solutions for solving the compressibility curve variables construct a unique framework for modeling the compressibility behavior of soils with an acceptable degree of accuracy and, more importantly, by a simple objective approach.

    Author Information:

    Soltani, Amin
    School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, SA

    Deng, An
    School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, SA

    Taheri, Abbas
    School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, SA

    Sridharan, Asuri
    Department of Civil Engineering, Indian Institute of Science, Bangalore560012

    Indian National Science Academy, New Delhi

    Estabragh, A. R.
    Faculty of Soil and Water Engineering, University of Tehran, Karaj


    Stock #: GTJ20170088

    ISSN:0149-6115

    DOI: 10.1520/GTJ20170088

    Author
    Title A Framework for Interpretation of the Compressibility Behavior of Soils
    Symposium ,
    Committee D18