Parametric study of the design of a solution of fine soil reinforcement with geosynthetics

Carlos, D.M., Pinho-Lopes, M. and Lopes, ML (2012) Parametric study of the design of a solution of fine soil reinforcement with geosynthetics. 5th European Geosynthetics Congress. 14 - 18 Sep 2012. pp. 74-84 .

Abstract

This paper presents a parametric study regarding the effect of several parameters used by the design method of British Standard BS8006-1: 2009 for the design of reinforced soil structures. The study consists in two parts. In the first part the design of a structure is performed using solutions which include one type of soil and five different geosynthetics. In the second part of the study a more extensive parametric study was conducted where relevant ranges of several properties were considered. These properties are: (1) the coefficient of friction and the adhesion coefficient between the soil and the geosynthetic; (2) the ultimate tensile strength of the geosynthetic; (3) the partial material factor for the reinforcement; and (4) the total horizontal width of the top and bottom faces of the reinforcing element at the layer (per meter). The external stability is verified with the same standard. Among other things, the results of this study allow to conclude that the use of different properties of interaction between the soil and the reinforcement is important only for the internal mechanism of failure by pullout; the pullout mechanism is more important for the design of solutions where reinforcements that have a higher tensile strength were considered. The total horizontal width of the top and bottom faces of the reinforcing element at the layer is important for the appearance or not of the pullout.

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Contributors

Author: M. Pinho-Lopes

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