I Yaimara Chávez Pérez conducted an investigation in 2014 as a conclusion of my engineering entitled Validation of a numerical model of the balsa foundation system combined with piles, in the presence of defective piles, applying the Abaqus / CAE software. Then I started my Masters with specialization in the area of ​​structures where I conducted a research entitled numerical analysis of the behavior of masonry walls against subsidence, applying the pulldown technique. During my Master's Degree I collaborated with the tenth-semester students of the Civil Engineering degree at the Autonomous University of Aguascalientes, for the preparation of their final project.