Estudo da erodibilidade de solos com cobertura de geossintéticos em laboratório

Abstract

The objective of this work was to analyze the erodibility of a soil in two situations: uncovered soil and with geosynthetic coverage, both using the Rainfall Simulator (SC) in the laboratory. To this end, tests were carried out with soil samples collected at the Itumbiara Hydroelectric Power Plant (Eletrobras Furnas), where research has already been completed and is in progress, for analysis of results regarding the effectiveness of covering the soil with the geosynthetic to be observed. . An acrylic box with dimensions of 0.50 m x 0.50 m x 0.30 m (0.25 m²) was used, with a portable sprinkling SC at a 5° inclination and a three-dimensional flexible geosynthetic with metallic reinforcement. It is concluded that, with the results obtained, it is possible to detect advantages and durability of the use of the geosynthetic, limited to the boundary conditions of the test carried out. It can also be concluded that the soil protected with adequate geosynthetic reduces the infiltration of rainwater into the soil and increases surface runoff, but reduces mass loss in the first 40 minutes, proving the efficiency of protection, as long as the geosynthetic is in contact with the soil surface throughout the rainy event.