Geotextiles in Embankment Dams - Association of State Dam Safety ...
Geotextiles in Embankment Dams - Association of State Dam Safety ...
Geotextiles in Embankment Dams - Association of State Dam Safety ...
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Use <strong>of</strong> <strong>Geotextiles</strong> <strong>in</strong> <strong>Embankment</strong> <strong><strong>Dam</strong>s</strong>GeotextileFunctionName andLocation<strong>of</strong> <strong>Embankment</strong><strong>Embankment</strong>Height(Meters)GeosyntheticInstalledDateInstalledInstallation DetailsReferencesFilterValcros <strong>Dam</strong>,France17 Nonwovengeotextile300 g/m 2(9 oz./yd 2 )with 0.15 mmopen<strong>in</strong>gs1970 Geotextile filter formed bywrapp<strong>in</strong>g the fabric around thegravel dra<strong>in</strong> located underneaththe downstream embankmentslope. <strong>Embankment</strong> is ahomogeneous fill <strong>of</strong> silty sandhav<strong>in</strong>g a d 85 <strong>of</strong> 7 mm and a d 28 <strong>of</strong>0.75 mm. The gravel dra<strong>in</strong> was 8to 13 mm (0.3 to 0.5 <strong>in</strong>ch) sizematerial.(Grioud and Gross, 1993),(Faure, and others 1999).FilterValcros <strong>Dam</strong>,France17 Nonwovengeotextile400 g/m 2(12 oz./yd 2 )1970 Geotextile filter placed onupstream dam slope betweenembankment material and ripraperosion protection layer.<strong>Embankment</strong> is a homogeneous fill<strong>of</strong> silty sand. Some m<strong>in</strong>or erosion<strong>of</strong> soil from under the geotextilewas experienced.(Grioud and Gross, 1993),Filter andDra<strong>in</strong>Brugnens <strong>Dam</strong>,France11 Needlepunchednonwovengeotextile1973 A thick geotextile was placed toact both as a filter and as a dra<strong>in</strong>to convey flow with<strong>in</strong> the pla<strong>in</strong> <strong>of</strong>the geotextile.(Giroud, 1992)
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