Record Display for the EPA National Library Catalog


Main Title Stability of Lined Slopes at Landfills and Surface Impoundments.
Author Mitchell, D. H. ; McLean, M. A. ; Gates, T. E. ;
CORP Author Battelle Pacific Northwest Labs., Richland, WA.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher Aug 90
Year Published 1990
Report Number EPA/600/2-89/057;
Stock Number PB90-251877
Additional Subjects Slope protection ; Embankments ; Earth fills ; Stability ; Slopes ; Landslides ; Soil erosion ; Soil mechanics ; Ponds ; Linings ; Shear properties ;
Library Call Number Additional Info Location Last
NTIS  PB90-251877 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 149p
The report describes the results of slope stability analyses, laboratory tests to measure the frictional properties of various interfaces that may be used in landfills and surface impoundments, and larger-scale tests to verify the data from laboratory tests. Several cases of sloughing of cover soils on FMLs in canals and tailings ponds have occurred. Sloughing at surface impoundments has occurred during heavy rainfalls, leading to the conclusion that the sloughing resulted from a buildup of pore-water pressure in the soil which reduced stability. This effect was demonstrated in tests on a 100-square-foot test stand. Stability analyses incorporating the effect of pore water was developed. Friction angles determined by direct-shear tests, the typical method used to measure interfacial properties, were compared with friction angles from larger-scale tests. The study determined that, in general, the direct-shear method produces friction angles that are less than those measured with a larger engineering-scale system. Therefore, friction angles determined by the direct-shear method are probably conservative for use in stability analyses.