Study of the Permanent Deformation of Soil Used in Flexible Pavement Design

Abstract

The decreasing supply of soils with geotechnical parameters suitable for pavement designs is a visible problem in our environment. In order to establish more efficient designs and adequate construction criteria, it is essential to understand the performance of materials. This is a study of the permanent deformation (PD) of soil used in pavement layers, obtaining prediction models through the technique of artificial neural networks, in addition to the design of pavement structures using mechanistic-empirical and empirical methods. The multistage repeated load triaxial (RLT) test, as well as numerical analyses of stresses and displacements using the CAP3D program, was used. The results showed that both the test procedure and the prediction models performed satisfactorily in obtaining PD behavior. Moreover, designs using the methods adopted resulted in distinct structures, that is, thickness different from the granular pavement layers. It was concluded that the model and test procedure exhibit significant potential for characterizing and modeling the PD of granular materials.

Permanent Deformation Analysis of Three Tropical Soils at Different Humidities Using Multistage Loading

“…The EN 13826-7 standard recommends the application of 10,000 charge cycles, in four charging stages, with different and increasing values of deviation voltage, keeping the confining voltage fixed, adopting 0.5% of DP as a stop criterion, if it occurs. Among some studies in the literature that used this technique, the following stand out: Arulrajah et al, (2021); Bilodeau and Perez Gonzalez, (2021); Cabral et al, (2020) ;Khasawneh, (2020); Bilodeau et al, (2013); Gidel et al, (2001), as seen in Table 1. Gidel et al, (2001) claimed that the single-stage loading to determine the DP of a material and to know its mechanical behavior, uses only a single pair of stresses, making the study more time consuming.…”

“…The Brazilian authors, in the article written by Cabral et al (2020), obtained the permanent deformation (DP) of the materials tested using the multistage loading technique. They proposed prediction models using the technique of artificial neural networks and numerical analysis of stresses and displacements using the CAP3D program.…”

GIS mapping used as supplementary tool to experimentally investigated subgrade soil for robust pavement design in rural area of Ethiopia

“…Soils are highly inconstant and adaptable in nature that needs to be investigated and explored of their actual behavior before designing followed by construction (Wendel et al , 2020; Zhao et al , 2021). Soil which forms the subgrade for roads and highway projects performs like the foundation of a building to provide stability and durability to the construction (Hopkins et al , 2006; Lollo, 2016; Surendra and Sanjeev, 2017; Jean-Sebastien and Tom, 2020).…”