AVALIAÇÃO DA PRECISÃO DOS MÉTODOS NÃO DESTRUTIVOS NAS INVESTIGAÇÕES SUB-SUPERFICIAIS

Abstract

A wide range of public services is buried under the surface of cities providing essential services for people's daily life, services such as the distribution of drinking water, natural gas, electricity, telecommunications, sewage collection... Visible targets of surface infrastructure, such as bridges, roads and buildings that do not require interventions for their registration, the existence and location of buried urban pipes remains a mystery in practically all cities, given the difficulty in registering them. The importance of registering it would not be obvious until dangers and problems arise, such as a gas explosion due to excavation without prior knowledge of the network or the collapse of projects conceived on existing services that need to be redone or cancelled. To locate these elements without the need for excavations, geophysical methods are being used, including georadar, which is presented as a non-invasive and non-destructive tool that has been successful in these applications. In this scenario, the objective of this article was to explore the techniques to obtain underground data using a georadar with an attached GNSS navigation device, comparing the results with a traditional total station georeferencing method.