Análise da estimativa de volumes de terraplenagem em obras rodoviárias a partir de informações provenientes de dados orbitais

Abstract

This work involves an analysis of earthwork volumes obtained from orbital images compared to earthwork volumes calculated with conventional topographic surveys. To carry out this study, the completed earthwork projects of an existing highway were used. Thus, this research aims to evaluate the technical feasibility of using orbital images to obtain topographic data that can serve as input for the development of highway projects, especially geometric and earthwork projects. A section of the CE-263 highway was then used, and its design was compared with the layouts obtained and analyzed from Copernicus DEM orbital images. It was found that the profile drawn on the surface created from the orbital image data is similar to the profile defined in the project provided for this research. However, a significant imbalance was observed between the distribution of cut and fill volumes between the projects. While the project used as a reference has a much larger fill volume than cut volume, in the project carried out the situation is reversed.

The project provided uses topographic data obtained through surveys following conventional methods. From this, it can be concluded that the methodology employed in this work presents limitations for application in road projects due to the altimetric differences found. Despite this, observing the digital terrain model through orbital image data can be a valid option, as in the case studied, the topology of the model is similar to the terrain surveyed in the provided project, demonstrating that orbital images can be used in preliminary project analysis. Therefore, it is suggested that future work study the use of datasets capable of offering smaller altimetric variations and analyze the behavior of altimetric variations in terrains with different known topographic characteristics.