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    Mechanical Methods of Undisturbed Soil Sampling

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    This paper discusses several methods used by the Bureau of Reclamation for the undisturbed sampling of soils including open-drive piston and double-tube core-barrel sampling. The paper describes in general terms how research studies have resulted in techniques now standardized. Included are recommendations for sampling saturated and unsaturated soils; expansive and nonexpansive materials; and loose, alluvial, and colian soils. An important consideration is the method by which the holes are stabilized with drilling mud.

    Author Information:

    Clark, K. R.
    Office of Chief Engineer, Bureau of Reclamation, Denver, Colo.

    Committee/Subcommittee: D18.02

    DOI: 10.1520/STP46184S