ANÁLISE TÉCNICA E DE CUSTOS DE CONTENÇÕES EM SOLO REFORÇADO: ESTUDO DE CASO

Abstract

Reinforced soil retaining systems have been widely employed in infrastructure projects due to their high stability, rapid construction, and versatility. This study aimed to perform a techno-economic analysis of three reinforced soil retaining solutions—Terra Armada, Muro Terrae, and Terramesh—applied to an underpass, comparing their structural performance and implementation costs. The design procedures were based on Brazilian technical standards and well-established geotechnical methodologies, including internal, external, and global stability analyses using limit equilibrium methods and specialized software. The economic assessment was carried out using the official cost databases of the Brazilian National Department of Transport Infrastructure (SICRO) and the Brazilian Federal Savings Bank (SINAPI), complemented by proprietary cost compositions when necessary. The results demonstrated that all three solutions satisfied the adopted stability and safety criteria. From an economic perspective, Muro Terrae presented the lowest implementation cost (R$ 406.59/m²), followed by Terramesh (R$ 588.24/m²) and Terra Armada (R$ 719.96/m²). It is concluded that all alternatives are technically feasible, and the selection of the most appropriate solution should consider the relationship between structural performance, implementation cost, and the specific characteristics of the project.