Volume 34, Issue 5 (September 2011)

    A Flexible Wall Permeameter for the Determination of the Water Permeability Function in Unsaturated Soils

    (Received 17 November 2010; accepted 9 June 2011)

    Published Online: 2011

    CODEN: GTJOAD

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    Abstract

    This paper describes the development of a suction controlled flexible wall permeameter for the direct determination of the water permeability function in unsaturated soils. The new permeameter works with applied constant head or constant rate of flow, i.e., the common steady-state techniques. Total volume change of soil specimens during the test are monitored using a high resolution electronic scale. Numerical simulations were performed to evaluate the influence of factors such as flow velocity and matric suction distribution within the specimen and effects of sample height on such factors. Analyses of tests conducted on two tropical soil samples are used to evaluate conventional proposals for the determination of the water permeability function. It is shown that such proposals do not apply in the case of the materials tested and solutions to that are put forwards.


    Author Information:

    Moncada, M. P. H.
    Pontifical Catholic Univ. of Rio de Janeiro,

    de Campos, T. M. P.
    Pontifical Catholic Univ. of Rio de Janeiro,

    Steger, G.
    Graz Univ. of Technology,


    Stock #: GTJ103595

    ISSN: 0149-6115

    DOI: 10.1520/GTJ103595

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    Author
    Title A Flexible Wall Permeameter for the Determination of the Water Permeability Function in Unsaturated Soils
    Symposium , 0000-00-00
    Committee D18