Research Article
Nov 1967
Embankment Drainage After Instantaneous Drawdown
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 93, Issue 6
Abstract
A method is presented for use in determining the position of the saturation line and the per cent drainage in the upstream portion of an earth dam following complete or partial drawdown of the reservoir based upon: (1) A dimensionless time factor which is a function of elapsed time, permeability, effective porosity, and boundary conditions, and (2) a drawdown ratio which expresses the drop in reservoir elevation as a function of the original height of water above the slope. Since an evaluation of slope stability under drawdown conditions is dependent upon pore pressures related to the position of the saturation line, a quick method of predicting its location is desirable. The drainage theory used in this method is similar to the approach proposed by Casagrande for evaluating base course drainage of airfield pavements and later adapted by Shannon for use in dams. Expressions are derived for predicting the effect of partial drawdown. Model studies indicate that hyperbolas related to a coordinate system, which is a function of the time factor and the drawdown ratio, can be used to define the saturation line.
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Information
Published In
Journal of the Soil Mechanics and Foundations Division
Volume 93 • Issue 6 • November 1967
Pages: 79 - 95
Copyright
© 1967 American Society of Civil Engineers.
History
Published in print: Nov 1967
Published online: Feb 12, 2021
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Authors
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Charles W. Newlin, M.ASCE
Prof. of Engrg., Arizona State Univ., Tempe, Ariz
Stanley C. Rossier, M.ASCE
Senior Proj. Engr., woodward-Clyde-Sherard & Associates, Philadelphia, Pa.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.