Análise de deslocamentos em projeto de solo reforçado com Geotêxtil

Abstract

The design of earth retaining structures is commonly based on limit equilibrium analyses, which do not take into account the strains resulting from constructive processes and those that occur throughout the structure life. The analysis of strains or displacements are important to reduce uncertainties related to geotechnical structure behavior and are currently facilitated due to the availability of commercial software able to make the calculations. This study presents the design and verification of stresses and displacements of a geosynthetic reinforced soil as a retaining structure. The geosynthetic selected is a needle punched nonwoven geotextile. The structure has 4.5 m height, 0.5 m embedded, and vertical face for simplification purposes. The soil parameters were taken from Alves (2017) and the geotextile parameters were from Pedroso (2000). The design was made in two steps: internal and external stability analyses, which led to a reinforcement length of 4.5 m and vertical spacing varying between 0.2 and 0.5 m. The verification of displacements in the structure was made through empirical methods from the literature and also by the finite element software RS², developed by Rocsience. In addition, some results obtained by other authors are presented and compared. From the numerical analysis, it can be concluded that the design was satisfactorily performed and the design methods used are somewhat conservative. This gives the engineer, the necessary security to guarantee the design life of the structure.