Published Online: 2006
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Limited tests had indicated peak drained values of angle of internal friction Φ of gravelly sands measured in the cylindrical wedge shear test (cylwest) to be relatively closer to the Φ expected from plane strain tests than from triaxial tests. Such a difference was not obtained between the results of the prismatic wedge shear test (priswest) and the triaxial test on gravels and crushed rock. In this study, six sands with <3.35 mm particles were tested. It was seen that the main reason for the difference between the Φ values from cylwests and priswests was the difference in the angle δ between the shear plane and the bedding planes. Cylwests, in which δ was nearly the same as in triaxial tests, gave results close to those expected from plane strain tests, and almost identical results to those obtained from shear box tests on specimens so prepared as to make δ the same.
Professor of Civil Engineering, Middle East Technical University, Ankara,
Assistant Professor of Civil Engineering, Celal Bayar University, Manisa,
Stock #: GTJ100223