Estudo do comportamento de geocompostos drenantes

Abstract

Often considered technologically delayed compared to other sectors, civil construction seeks to incorporate new technologies in traditional activities. In geotechnical engineering, we can highlight the use of geosynthetic materials as evidence. In this area, the applications of geosynthetics in the drainage functions deserve special attention. Often the reason for problems in construction, drainage requires special attention of the designer. The use of drainage geocomposites for the purpose of capturing and conducting water present in the soil has become increasingly frequent. Knowing and understanding the behavior of this type of material can represent a more precise dimensioning and consequently greater security in the application and reduction of costs for the implementation of these solutions. This research aimed to study the performance of a drainage geocomposite through laboratory tests to determine the physical, mechanical, hydraulic and durability characteristics of the geosynthetics in addition to the numerical modeling using the parameters obtained in the tests. Through the correlation between the compression, transmissivity and creep tests, it was possible to predict the reduction in the flow capacity of the material in the long term, establishing specific creep reduction factors for this type of material. In order to calibrate the model, numerical analyzes of the compression and transmissivity tests were performed. In the modeling of the compression test it was observed that the numerical model approached the results of the test. In the modeling of the transmissivity test it was found that the numerically predicted flow values find greater compatibility for lower stress. After this step, numerical analyzes of a field situation were performed and the results obtained were compared with the values resulting from the characterization tests of the draining geocomposite. The strain of the material in the numerical analysis proved to be compatible with the compression tests performed, in order to reproduce the material flow capacity, it was necessary to update the material permeability, in this way, a second analysis was performed and the results considered satisfactory.