Vane Shear Testing for Staged Constructionby Willis L. Walker, Shive-Hattery Engineers, Iowa City, IA, USA,
Abstract: Staged construction was used for the earthfill embankment of Birch Dam in order to compensate for low strength clays in the foundation. Sampling and testing of foundation soils verified the expected strength gain obtained through consolidation. Vane shear testing of in situ foundation soils supplemented laboratory triaxial testing in evaluating this strength gain. Increased drilling depths to penetrate the embankment required that the vane shear tests be abandoned, but not before sufficient data was developed to provide evidence of the usefulness of vane shear tests regarding the evaluation of strength gain through consolidation.
Subject Headings: Shear tests | Soil strength | Shear strength | Soil tests | Vanes | Triaxial tests | Field tests | Embankment dams
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