Geomechanical classification and stability analysis of road slopes in rock masses in stretches of the PE-160 and BR-104 roadways

• Autor(a) principal: Mineiro, Tallys Celso
• Data de Publicação: 2021
• Outros Autores: Calado, Gabriel Magno Cavalcante, Guimarães Filho, Wagner Leal, Souza, Ananda Barbosa de, Oliveira, Shirley Minnell Ferreira de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/23637
• topic: Rodovias; Estabilidade de talude; RMR; SMR; Geomecânica.; Roadways; Slope stability; RMR; SMR; Geomechanics.; Carreteras; Estabilidad de taludes; RMR; SMR; Geomecánica.

Infrastructure works such as roads play a vital role in the functioning and development of a society; in this case, being essential for the textile flow of the region. It is common in road works toc ut rock masses resulting in slopes, which fundamentally need stability for the full functioning of its generating routes. This study aims to analyze slopes descendant from the duplication of the PE-160 and BR-104 stretches between the municipalities of Santa Cruz do Capibaribe and Toritama, with the aim of verifying their stability using geomechanical classifications as tools for quantification and qualification. In the verification of stability, RMR (Rock Mass Rating) and SMR (Slope Mass Rating) were used. The RMR is based on preliminary intrinsic data to the rock mass such as rock quality, characterization of discontinuities and hydrogeological conditions; while the SMR adds another two features to RMR, which are the attitudes of the discontinuities of the embankment and its excavation methodology. With the data obtained in the field, the RMR of the massif was calculated and this value was used for the  determination of the SMR, that qualifies the global stability condition of the slope. The results obtained identified situations of global stability on the slopes; however, local instabilities were observed and for such minimum conditions, improvement and protection methodologies were suggested. Therefore, the use of slope stability studies like this one can assist in verifying the safety conditions of the roadway, ensuring them or anticipating incidents and accidents, and, helping with decision-making.