Análisis del dimensionamiento de estructuras de pavimento flexible empleando los métodos de Diseño racional (2002) y Aashto (1993). Caso de estudio TMAP 5°c, 10°c y 15°c

Abstract

The road infrastructure is directly related to the economic, social and technological development of any country, for this reason it is of vital importance to guarantee the construction and useful life of these, taking into account the environmental, climatic, geological and engineering variables of the study area. For the construction of road infrastructure, there are a variety of studies, as well as design methods. The present research – innovation describes two methods of designing flexible pavement structures, where each method is related to their respective variables such as objective and subjective, and the implications of these for designing a pavement structure. The structure of a flexible pavement is sized by specific design variables. The two methods to design this type of pavement object of this research are: the method of the American Association of State Highway and Transportation Officials - AASHTO (1993), where its design variables are CBR%, traffic, reliability, serviceability, drainage conditions, among others, and the Rational method, which evaluates the efforts to which the structure is subjected throughout its design period, variables such as traffic, CBR, the mechanical properties of materials and the probability of failure also influence. Both methods have similarities and differences when designing, making the structures have different dimensions. In general, the Rational method tends to generate greater layer thicknesses compared to those obtained by the AASHTO method (1993). To carry out the investigation, a sensitivity analysis of the objective and subjective variables that are part of the design of each method was carried out to determine which variables have the greatest influence on the oversizing between the structures of both methods. As a complement, a cost analysis was also made for the most important structures in the research. This study was conducted for structures exposed to average annual average temperatures (TMAP) of 5°C, 10°C and 15°C. Another working group will carry out the sensitivity analysis for the case of average annual average temperatures of 20, 25, 30 °C.