Análise da calopsibilidade de solos : estudo de caso de um aterro no Campus de Russas - CE da UFC

Abstract

In recent years the study of unsaturated soils has been gaining more space in the scientific scene, so that a particular case would be the collapsible soils. This type of soil is formed by a macroporous structure, which has a metastable balance between the larger particles, causing the existence of structural elements responsible for an ephemeral resistance of the soil, which can cause the generation of a collapse. Thus, it is possible that the soil suffers high deformations when an additional load is present or not. The damage that this type of material can cause is of great proportions, so there is an incentive to study the soil in advance to prevent accidents and damage to the structure. There are reports of collapsible soils all over Brazil, and some regions of the Northeast are included in this list. Thus, this study sought to analyze the collapsibility of the soil used in the embankment of the construction of the University Restaurant of the Federal University of Ceará, located in Russas - CE. The motivation of the research occurred due to the pathology found at the site, which occurred shortly after a rainy period, with the unevenness of the blocks that form the floor of the walkway that gives access to the environment. In the development of the study a deformed soil sample was collected, and then a geotechnical characterization was performed. Furthermore, a simple edometric test was performed to classify its expansibility. With the development of the study the soil was classified by SUCS as SM - Silty Sand, and in the characterization tests results were obtained that, when compared to other studies of soils with similar characteristics, demonstrate that there would be a high probability that the soil studied has low potential for collapse. As a result of the simple edometric test, it was found that the structural collapse coefficient related to the soil would be 0.42%, a value that makes the soil not classified as collapsible. Finally, the study revealed that the damage caused to the local structure would not be related to the characteristic of the embankment being a collapsible soil, because it has no evidence of such a characteristic. For future work there were suggestions such as performing the test with an undertrained sample, using other stress ranges applied to the soil and more accurate tests to verify the soil suction.