Application of Digital Close Range Photogrammetry in a Triaxial Test for Determining the Elastic Parameters of a Soil Sample

Abstract

This research was conducted with the purpose of creating letters of variation of the elastic parameters of artificial soil mixtures, which would be used for future research on physical models. For that purpose, digital close range photogrammetry was applied for measuring relative displacements in artificial soil samples subjected to a UU triaxial test. For the different effort conditions during the triaxial test stages, pictures were taken with a conventional digital camera, thus managing to recreate the tridimensional pictures; the relative displacements were measured in 3D with the help of specialized hardware and software, with which the elastic parameters were determined, such as: the ν Poisson ratio, E elasticity modulus and the ψ dilatancy angle. The results obtained with this new application were compared with the readings taken from the triaxial test