VIABILIDADE NO USO DE BIOMANTA E GRAMA EM PLACAS NA PROTEÇÃO SUPERFICIAL DE TALUDES

Abstract

This work compared the use of geomats and grass mats on slope protection. As this approach is of great relevance like many landslides are currently being witnessed, they are directly affecting the population and bringing great damage to public coffers. A field experiment was carried out, because through the results it was possible to compare the methods and indicate the best cost benefit. The objective of this study was to relate the slope erosion with the possible control protection methods in order to better guide this choice process. In view of the various methods of slope stabilization, in this work the grass mats and geomats method were used. The purpose of surface protection of slopes is to protect the surface against erosive processes that disaggregate parts of the soil, in addition to avoiding surface saturation of the massif, preventing its resistance from being affected due to these factors, which could lead to slope to failure (ALHEIROS et al., 2003). For this, a study was necessary to know the properties of the soil where soil samples were used, duly characterized by the granulometry test carried out in the laboratory of the UNIS group in Varginha-MG, and later classified by the TRB method. The natural soil moisture was 10.7% and it was classified as soil A-1b (sand well graded sw). Then, the application of the geomat and grass mat materials was carried out. Among the methods of surface protection of slopes studied, the geomat obtained the best cost-benefit, because even the methods showing the same result in relation to efficiency in soil protection, the price of obtaining the m2 of the geomat was lower. In addition, the use of grass mats requires a greater need for maintenance compared to the geomat.