Optimización de la geometría de la vía desde el puente Yanayacu hasta Píllaro entre las abs 0+000 – 4+875 perteneciente a la provincia Tungurahua

Abstract

Given the transportation difficulties faced by the residents of the San Andrés parish, this project proposes to substantially improve the road infrastructure in this area. By optimizing the road that connects the Yanayacu bridge with Píllaro between sections 0+000 and 4+875, productive and tourist activities will be facilitated, generating new development opportunities for the Tungurahua sector. The project was structured into three main phases. The first phase corresponded to the preliminary studies, which included fieldwork such as topographic surveys and vehicle counts to determine the ADT of the road. Subsequently, in the second phase, soil studies were conducted, including destructive and non-destructive tests, to characterize the physical and mechanical properties of the soil, as well as the pavement deflections. Finally, in the third phase, using the data obtained in the previous phases, the geometry of the road was redesigned, taking into account the newly calculated TPDA, the soil characteristics, and the applicable technical standards. In this phase, the horizontal, vertical, and transverse design was defined, as well as the other geometric elements. Additionally, a budget was prepared that includes all the costs associated with the construction of the new road, thus ensuring the project's viability. The topographic analysis revealed a mountainous terrain with steep slopes, while the traffic study classified the road as class I. The soil tests indicated a sandy loam material with a CBR of 19.18 percent suitable for subgrade. The results of the deflection measurements with the Benkelman beam showed that 89 percent of the evaluated track length needs reconstruction. Based on these results, the pavement structure was redesigned, consisting of a 7.5 cm asphalt layer, a 15 cm base, and a 20 cm subbase. Finally, the estimated budget calculated for this project was $1´686,962.16