Avaliação da influência da compactação em escala reduzida na deformabilidade de solos arenosos

Abstract

Soil compaction is a process widely used nowadays, which basically consists of reducing the void rates of soil samples through the application of static or dynamic loads, and can be used in the field or in laboratory tests, in order to improve the mechanical properties of the soil, such as: Resistance, permeability and deformability. The evaluation of the aforementioned mechanical properties is normally carried out in the laboratory, through special tests. In situations where there is little amount of soil available, the tests can be carried out on samples compacted directly in the equipment apparatus, such as in the consolidation ring, or in the shear box and even in the permeameter itself. Normally, this compaction of the samples to be tested takes place through a density and

humidity control, but without a compaction energy control, and this non- standardized energy distribution can directly affect the geotechnical

parameters under analysis. This research has as main objective the study of the influence of the type of compaction as analysis of soil deformability, analyzing results of densification test comparing results of the Proctor test, conventionally used in laboratories, and the miniature compaction test, without compaction energy control. The study has focus on sandy soils taken from the states of Piauí and Rio Grande do Norte, in the year 2021, where we have a characterization of these soils that are later compacted, in their optimal maintenance of moisture, using the two characterized compaction methods. Then the densification tests will be concluded where results will be found that will allow reach the conclusion of the general research. These results were found and is made a comparison to analyze the influence of the miniature compaction teste in soil compressibility. The results indicate that there is an influence of miniature compaction in deformability of the sandy soils because it was possible to obtain an average variation of settlements of 24.53% for soils compacted on a reduced scale in relation to soils compacted by the Proctor method, reaching a percentage difference of 32.18%. In addition, very similar expansion results were obtained, with this percentage rising to 26.43%, with expansion differences reaching more than 50% in one of the samples.