Revisión de los coeficientes de equivalencia de los espesores de la NC 334:2004 mediante la modelación computacional
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Martínez León, Daniel
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Universidad Central “Marta Abreu” de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
En Cuba actualmente para el diseño de pavimentos flexibles se emplea la norma NC 334
cuya primera edición fue puesta en circulación en marzo de 2004, la cual está basada en
modelos netamente empíricos. Para el diseño de la estructura de pavimento, dicha norma
emplea diferentes coeficientes de equivalencia validados mediante cálculos analíticos
que correlacionan las tres capas componentes de la estructura de pavimento (superficie,
base, subbase) con una base granular de 500 MPa y tratadas como sistemas
independientes sin interrelación entre ellas. El objetivo de esta investigación es la revisión
de los coeficientes de equivalencia de espesores mediante un modelo numérico empírico
y apoyado en la estadística inferencial. En base a ello se pretende representar de forma
acertada el estado tenso-deformacional de las estructuras proyectadas a partir de un
análisis conjunto, asentado en los criterios de diseño racional de pavimentos flexibles,
todo esto con la finalidad de revisar parámetros como deformación y deflexión para
chequear que los resultados obtenidos se encuentren dentro de parámetros tolerables
para las estructuras diseñadas a lo largo de su vida útil. A raíz de los resultados de la
investigación, los cuales arrojaron que los mismos difieren de los valores normativos, se
procede a efectuar una propuesta de nuevos coeficientes de equivalencia de espesores
para dos estructuras de pavimento flexible que fueron diseñadas para dos viales
construidos en la región central, las cuales se emplearon en el análisis.
Nowadays in Cuba for flexible pavement design is employed the norm NC 334, which first edition was circulated in march of 2004 and it is based in empiric models. For pavement structure design, the norm employs different equivalency coefficients which have been certificated by means of analytical computations that interpret the three component capes of the pavement structure (surface, base, subbase) with a granular base of 500 MPa and treated as independent systems without compatibility. The objective of the present investigation is the revision of thickness equivalency coefficients by means of an empiricist numeric model and the inferential statistics. On the basis of it, it will be represented correctly the tenso-deformational state of the projected structures starting from a conjunct analysis established in rational designing criteria of flexible pavements, all this with the finality of revising parameters such as deformation and deflection to check that the obtained results be within tolerable parameters for the designed structures throughout its service life. In the wake of the investigation's results, where they show that they differ from the normative values, it proceeds to make a proposal of new thickness equivalency coefficients for two structures of flexible pavement which belong to two roads built in the central region, which were taken to perform the analysis.
Nowadays in Cuba for flexible pavement design is employed the norm NC 334, which first edition was circulated in march of 2004 and it is based in empiric models. For pavement structure design, the norm employs different equivalency coefficients which have been certificated by means of analytical computations that interpret the three component capes of the pavement structure (surface, base, subbase) with a granular base of 500 MPa and treated as independent systems without compatibility. The objective of the present investigation is the revision of thickness equivalency coefficients by means of an empiricist numeric model and the inferential statistics. On the basis of it, it will be represented correctly the tenso-deformational state of the projected structures starting from a conjunct analysis established in rational designing criteria of flexible pavements, all this with the finality of revising parameters such as deformation and deflection to check that the obtained results be within tolerable parameters for the designed structures throughout its service life. In the wake of the investigation's results, where they show that they differ from the normative values, it proceeds to make a proposal of new thickness equivalency coefficients for two structures of flexible pavement which belong to two roads built in the central region, which were taken to perform the analysis.