Flume studies were conducted in which riprap embankments were subjected to overtopping flows. Embankment slopes of 1, 2, 8, 10, and 20% were protected with riprap containing median stone sizes of 1, 2, 4, 5, and/or 6 in. Riprap layer thickness ranged from 1.5 D50 to 4 D50. Riprap design criteria for overtopping flows were developed in terms of unit discharge at failure, interstitial velocities and discharges through the riprap layer, resistance to flow over the riprap surface, effects of riprap layer thickness and gradation on riprap stability, and potential impacts of integrating soil into the riprap layer for riprap stabilization. A riprap design procedure is presented for overtopping flow conditions.


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    Title :

    Development of Riprap Design Criteria by Riprap Testing in Flumes: Phase 2, Followup Investigations


    Contributors:
    S. R. Abt (author) / R. J. Wittler (author) / J. F. Ruff (author) / D. L. LaGrone (author) / M. S. Khattak (author)

    Publication date :

    1988


    Size :

    136 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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