Modelagem tridimensional para análise da estabilidade de taludes.

Abstract

The analysis of slope stability is a widely studied scientific topic in geotechnics. Thus, studies in this area seek a better understanding of the subject to enable decision-making and preventive or corrective actions, as landslide occurrences can lead to significant environmental, social, and property damages. This study introduces a practical configuration developed to generate high-resolution images and three-dimensional (3D) models using drones for monitoring slopes and earth masses. The defined study area was the slope located in the João Lourenço street in the municipality of Areia-PB, identified as a high-risk area in research conducted by CPRM (2015). For mapping purposes, a Drone Harmony flight platform was employed to achieve greater accuracy and assist users in acquiring high-resolution images. These images were processed using photogrammetry software, Metashape, to generate models of the study area. The slope stability analysis was conducted by integrating the 3D model generated through photogrammetry with Rocscience's Slide3 software, enabling the efficient acquisition of data related to surface and topography, facilitating effective stability analysis. This approach yields several benefits, including practical and precise slope verification, favorable cost-benefit ratio, and increased efficiency in investigating slope stability. The three-dimensional analysis showed results similar to previous studies, with minimum safety factors (FS) ranging from 1.11 to 1.89. This innovative approach has the potential to enhance efficiency and accuracy in evaluations, contributing to safer and more sustainable geotechnical project planning. Based on the obtained results, it can be concluded that aerial surveying through photogrammetry and three-dimensional modeling are tools of great importance in surveys, data interpretation, and prompt effective decision-making.