STP623

    Experiences with Tests of Dispersibility of Fine-Grained Soils for Dams in Colombia

    Published: Jan 1977


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    Abstract

    The new methods of investigating colloidal erodibility (dispersion) of fine-grained soils for the impervious sections of earth dams have been used as part of the design studies for two important dams for hydroelectric projects in Colombia. The soils derived from weathering of diorite which form the surface materials over a large geographic area are highly erosion resistant, as evidenced by resistance to erosion of severe rainfall runoff (annual rainfall 3 to 5 m/year), and are shown to be nondispersive in laboratory tests. Laboratory tests of filter requirements confirm that sand filters are not needed to prevent piping.

    Keywords:

    clays, dams, laboratory tests, erosion


    Author Information:

    Villegas, F
    Associate, Integral Ltda., Medellin,


    Paper ID: STP27004S

    Committee/Subcommittee: D18.02

    DOI: 10.1520/STP27004S


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