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Evaluación en el nivel de resistencia de una subrasante, con el uso combinado de una geomalla y geotextil

Abstract:

In the present study was determined the resistance level that can provide simultaneously placing a geotextile and geogridwithinsubgrade-granular layer interface, as a reinforcing structure. Furthermore, a comparison with the resistance which can supply only application of a geotextile, a geogridand without any kind of reinforcement is established. Thus, the pavement structure that is being placed on the project of improving the Sigsig-Gualaquiza road,was evaluated on the Matanga-Gualaquiza section, in the province of Morona Santiago, which at this time the project is running and is being implemented this new construction technique. To achieve the objectives, laboratory tests that allowed to obtain stress / strain curves for each of the scenarios analyzed were made. Subsequently, the performance achieved in the laboratory was simulated through numerical models in the Software Plaxis 8.6 (Finite Elements), which resulted efforts granularlayer-subgrade interface and the consequent determination of strengthening factors. The findings of the study demonstrate a significant reduction in the thickness of the upper layer over subgrade, also they confirmed that there is no representative improvement when a geotextile and geogridare used simultaneously. Some recommendations and suggestions in a short and medium term to improve the performance of these materials in the construction are presented, including some design method that can be implemented in the Ecuadorian legislation that will support the use of these elements in road engineering.