The foundation soil at the toe of a masonry dam has a porosity of 38% and a

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The foundation soil at the toe of a masonry dam has a porosity of 38% and a ρ s of 2.73 Mg/m3. To assure safety against piping, the specifications state that the upward gradient must not exceed 30% of the gradient at which a quick condition occurs. What is the maximum permissible upward gradient? (After Taylor, 1948)?

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An Introduction to Geotechnical Engineering

ISBN: 978-0132496346

2nd edition

Authors: Robert D. Holtz, William D. Kovacs, Thomas C. Sheahan

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