Análise de estabilidade de um talude no bairro do Roger na cidade de João Pessoa - PB

Abstract

Due to its geomorphological conditions, Brazil is a country that commonly faces the imminent risk of slope landslides. In addition to this, there is the predominantly tropical climate, with high rainfall indexes between the months of April and July, leading to a higher incidence of mass movements. Furthermore, the exacerbated urban population growth is a predominant factor in the dynamics of mass movements, promoting inadequate land occupation and use. As a result of the aforementioned factors, risk areas emerge in various parts of Brazil, contributing to the occurrence of issues regarding slope landslides. In the municipality of João Pessoa, in the state of Paraíba, the occurrence of mass movements can be evidenced from data provided by the Municipal Coordination of Protection and Civil Defense (COMPDEC-JP). Among the risk areas cataloged by Civil Defense in the city of João Pessoa, the Roger neighborhood stands out, with frequent records of landslide occurrences. Despite the frequent mass movements, situations are addressed in a corrective rather than preventive manner, as the cataloging of areas at risk is not yet comprehensive, which ultimately facilitates the recurrence of landslides. In light of the aforementioned, the present study aims to analyze the stability of a slope located in the Roger neighborhood, which has already experienced a landslide occurrence recorded by COMPDEC-JP. To achieve this, soil samples were collected from the chosen slope for laboratory testing, in order to determine the existing geotechnical parameters. By modeling the slope using GeoStudio software, it was possible to assess the safety factor for each of the proposed situations (natural soil and saturated soil). Conducting a comparative analysis with the guidelines of NBR 11682 (2009), which addresses slope stability, it was found that the soil is unstable with an imminent risk of landslide.