The Use and Performance of Seepage Reduction Measures

by Robert D. Powell, Gartner Lee Associates Ltd, Markham, Ont, Canada,
Norbert R. Morgenstern, Gartner Lee Associates Ltd, Markham, Ont, Canada,



Document Type: Proceeding Paper

Part of: Seepage and Leakage from Dams and Impoundments

Abstract:

The utilization and performance of various foundation seepage reduction measures from over 100 dams situated on pervious soils throughout the world has been reviewed. Summary discussions of the utilization of slurry trench cutoffs, concrete diaphragm walls, upstream impervious blankets and grout curtains are presented. Also presented is a compilation of acceptable and unacceptable seepage quantities beneath dams, situated on previous soil foundations, as represented in the literature. A criterion for permissible seepage emerges that is of value for preliminary design and in safety evaluation of embankment dams.

Subject Headings: Dam foundations | Embankment dams | Seepage | Diaphragm walls | Concrete dams | Foundation design | Trenches

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