Análise do comportamento de contenções em solo grampeado com a utilização de diferentes fases de injeção da calda de cimento: comparativo de casos

Abstract

With the expansion of infrastructure projects and the growing occupation of areas with irregular topography, the demand for efficient solutions for slope stabilization and earth retaining systems has become increasingly relevant. In this context, soil nailing has been consolidated as a strategic technique, combining safety, construction efficiency, and cost-effectiveness. This study addresses the analysis of nailed soil retaining structures, focusing on the use of different phases of grout injection—a construction methodology that, although only recently standardized, has long been applied in geotechnical practice. The analysis was based on two case studies reported in the technical literature by Pinto et al (2022) and Silva (2019), aiming to understand how the bond resistance of soil nails behaves when subjected to grout re-injection in different soils and which factors influence this behavior. The results showed that reinforcement injection phases are not a universal solution, and in some cases, they may even reduce the performance of soil nails. Despite its limitations as a study based on secondary data from the literature, this work seeks to contribute to a better understanding of soil nail behavior in distinct geotechnical conditions. The conclusions emphasize the importance of a detailed analysis of construction procedures and design parameters to optimize the performance and safety of soil nailing techniques.