Mass Angle of Repose of Open-Graded Rock Riprap
Publication: Journal of Irrigation and Drainage Engineering
Volume 137, Issue 7
Abstract
Mass angle of repose (that is, the angle at which a mass of sliding particles will come to rest) is a fundamental material property that is needed to design drainage channel linings composed of open-graded riprap stone, also called dumped rock riprap, which protect earthen slopes from erosion by flowing water. Multiple regression analysis of measurements at 74 stockpiles of dumped natural and crushed rock shows the angle to depend primarily on rock particle angularity and, to lesser extents, on the gradation and the median particle diameter of the stone mixture, the angle increasing with angularity, mixture nonuniformity, and particle size. Uncomplicated expressions are developed from the data to calculate the expected mass angle of repose of open-graded rock riprap along with prediction intervals.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 137 • Issue 7 • July 2011
Pages: 454 - 461
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jul 12, 2010
Accepted: Oct 21, 2010
Published online: Jun 15, 2011
Published in print: Jul 1, 2011
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