Análise de fluxo no interior de barragens de terra a partir do método do potencial espontâneo (SP)

• Autor(a) principal: Guireli Netto, Leonides [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203217; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-12-11/000909641.pdf
• topic: Geologia de engenharia; Barragens de terra; Polarização induzida; São Paulo (Estado); Cordeirópolis (SP); Ipeúna (SP)

The application of geoeletric methods, such as induced polarization (IP), the electroresistance and the spontaneous potential (SP), presents an important indirect study methodology in several areas of geology, such as mining, geotechnics and environmental geology. The present work deals with the results of the application of the spontaneous potential method (SP) in small earth dams in the cities of Cordeirópolis and Ipeúna, both in the State of São Paulo. The studies of Engineering of Dams intensified in the end of century XX, due to alarming numbers of dam disruptions. In Brazil, small dams are still the majority, around 90% of the total. This work presents results of surveys of the spontaneous potential in two small dams, analyzing the influence of classical dams structures, such as spillways, on the method. Three lines of 78 meters each were made, with a spacing of 2 meters between the electrodes in the Cordeirópolis dam and three lines of 122 meters each, spaced 2 meters between the electrodes in the Ipeúna dam. In both collections the Potential Technique (or fixed base) was used. The collected data were worked on 2D maps of spontaneous potential and 3D profiles, which allowed to identify the zones with greater and smaller values of potential difference, preferential flow of the subsurface fluids in the areas and possible problems in the structure of the dam, that could affect the physical integrity of the structure