Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52491#.VJodVcCAM4 Author(s) Hans Rönnqvist , Peter Viklander Affiliation(s) Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden . ABSTRACT This paper presents a database of glacial till gradations that are compiled from laboratory internal stability tests from the literature and from core soils of existing dams, some of which have experienced internal erosion. The potential internal instability of these gradations is assessed using empirical methods. Two approaches of evaluation are used: the Kenney-Lau method, which analyzes the shape of the gradation curve; and the Bure...
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