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Desempeño de una vía no pavimentada reforzada con geomalla: construcción de un modelo físico en laboratorio y validación numérica
Performance of an unpaved roads reinforced with geogrid: construction of a physical model in laboratory and numerical validation
DOI:
https://doi.org/10.15446/dyna.v91n231.112274Palabras clave:
geosintéticos; vía no pavimentada; refuerzo (es)geosynthetics; unpaved; reinforcement (en)
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Este estudio evaluó el comportamiento mecánico de un modelo físico laboratorial de una vía no pavimentada reforzada con una geomalla biaxial GB. Para tal fin, se compactaron 0.15 m de material de mejoramiento y 0.20 m de subrasante en una caja cuadrada de 0.35 m. Se realizaron ensayos con y sin refuerzo, mediante la aplicación de 10000 ciclos de carga dinámica en una maquina universal. Se utilizo una frecuencia de 2.5 Hz y presión de 560 kPa mediante una placa circular de 0.10 m de diámetro, simulando la circulación de una llanta de un eje rueda simple. La validación numérica vía Métodos de los Elementos Finitos (MEF) definió parámetros usando el modelo Hardening Soil. Como gran conclusión, se pudo evidenciar que el refuerzo con una geomalla reduce aproximadamente 45% la magnitud del ahuellamiento, según el modelo, debido a que la geomalla reduce la concentración de esfuerzos cortantes (τ relativo) disminuyendo la deformación plástica.
This study evaluated the mechanical behavior of a physical laboratory model of an unpaved route reinforced with a BG biaxial geogrid. To this end, 0.15 m of improvement material and 0.20 m of subgrade were compacted in a square box of 0.35 m. Tests were carried out with and without reinforcement, by applying 10000 dynamic load cycles on a universal machine. A frequency of 2.5 Hz and pressure of 560 kPa was used by a circular plate of 0.10 m in diameter, simulating the circulation of a tire of a simple wheel axis. The numerical validation for the Finite Elements Methods (MEF) defined parameters using the Hardening Soil model. As a great conclusion, it could be evidenced that reinforcement with a geogrid reduces approximately 45% the magnitude of the rutting, depending on the model, because the geogrid reduces the concentration of cutting stresses (relative τ) decreasing plastic deformation.
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