STRUCTURAL COMPARISON BETWEEN THE DESIGN OF ROOT PILES OBTAINED BY NUMERICAL AND ANALYTICAL METHODS

Abstract

Deep foundations, especially root-type foundations, are characterized by having great lateral strength and edge strength, being molded in loco and being injected. This was the pile model used in this real case study, where 6 piles of a base were dimensioned to support a sugarcane shredder in a sugarcane mill. Through data obtained by the companies participating in the planning, projects and execution, the sizing and detailing of the piles was carried out using analytical and numerical methods, where the first is based on literature and standards described using the semi-empirical methods of Aoki Veloso and Decourt Quaresma, where the method chosen was that of Aoki Veloso because it has the least resistance. The second method is the numerical one, which is performed through computational software, the AltoQi Eberick®. The analyzes carried out indicate few differences in the values ​​of steel area and compressive stresses. The analytical method proposed by Aoki Veloso proved to be the most conservative, delivering a load capacity of 38 tf, while the computation methods of the Eberick® computational software are less conservative, delivering a load capacity of 33.87 tf. When performing the reinforcement design calculations, the results obtained by the two methods are identical because they have a tip voltage lower than the minimum provided by the standard, so the minimum reinforcement for both methods was used. A detailed study was carried out showing the advantages and disadvantages of both methods, the analytical method proved to be assertive mainly for small details, while the numerical method was more conservative and efficient in relation to working time and the possibility of calculation for larger structures. complex.