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    Volume 38, Issue 3 (May 2015)

    Water-Retention Curves of Coarse Soils Without Organic Matter: Improved Data for Improved Predictions

    (Received 10 September 2013; accepted 25 February 2015)

    Published Online: 06 May 2015

    CODEN: GTJODJ

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    Abstract

    It is difficult to obtain a reliable water-retention curve (WRC) for coarse-grained soils without organic matter. As a result, the field behavior of draining layers in engineering problems may be poorly predicted. The main goal of this paper is to develop predictive methods for the WRC of coarse-grained soils based on long-column, long-duration drainage test data and available soil properties. The paper first shows that predictive models perform poorly for coarse-grained soils, but four descriptive models can correctly fit the test data. Second, it provides predictive equations for the air-entry value (AEV), residual suction ur, and residual water content θr as simple functions of the effective size d10 and void ratio e. Third, it provides new formulas that relate d10 and e to the parameters of descriptive models; thus, enabling them to become very simple to use predictive models for ed10 > 0.05 mm. The paper finally shows that small variations in d10 and e have more influence on the saturated permeability than on the WRC parameters.


    Author Information:

    Chapuis, Robert P.
    Dept. of Civil, Geological and Mining Engineering, École Polytechnique, Montreal, QC

    Masse, Isabelle
    Dept. of Civil, Geological and Mining Engineering, École Polytechnique, Montreal, QC

    Madinier, Bénédicte
    Dept. of Civil, Geological and Mining Engineering, École Polytechnique, Montreal, QC

    Duhaime, François
    Dept. of Civil, Geological and Mining Engineering, École Polytechnique, Montreal, QC


    Stock #: GTJ20130154

    ISSN:0149-6115

    DOI: 10.1520/GTJ20130154

    Author
    Title Water-Retention Curves of Coarse Soils Without Organic Matter: Improved Data for Improved Predictions
    Symposium ,
    Committee D18