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Limit equilibrium design of reinforced soil structures requires input of several material parameters. Properties required for design and status of standardized test methods and procedures by ASTM for definition of these properties are summarized. Results of a limited parametric study investigating effect of small variances (i.e., 10%) in material property values on design of reinforced soil structures are presented. Small variations in both soil friction angle and direct shear coefficient between soil and geosynthetic reinforcement have an economically significant impact on the design of reinforced walls and slopes, for the cases examined.
laboratory tests, reinforced soils, limit equilibrium analysis, soil shear strength
Consultant, Woodbury, MN
Vice President, Tensar Earth Technologies, Morrow, GA