Análise de desempenho de aterros reforçados com geossintéticos

Abstract

This work proposes the performance analysis of geosynthetic reinforced backfills by comparison of safety factors and material costs of the results gathered in the analysis with those obtained for gravity walls. To do so, standard situations with 5 and 10 meters high slopes were conceived and then the design of the retaining structures were made by using one method that uses deformation compatibility, Dantas e Ehrlich (1999), and another one that uses the limit equilibrium, proposed in “Manual Técnico de Encostas” Georio (2000). Another goal of this analysis is testing different sorts of soil and their influence on the design of retaining wall structures, by comprehending the effects of the friction angle and cohesion on the design, though the cohesion may not be recommended because of the negative effects that may result from using fine soils on backfills. The material costs were calculated by using the version 024 of the price tables of “Seinfra-CE” and the one from “DER-SP. Then, the results are exposed leading to the conclusion that the geosynthetic reinforced backfill is the best alternative for 5 and 10 meters high slopes apart of the design method used.