Estudo paramétrico sobre recalque de radiers estaqueados utilizando o método dos elementos finitos

Abstract

Economically profitable lands with good geotechnical characteristics to receive loads resulting from the increase in the number of constructions that aggregate more people in a smaller area are increasingly difficult components to be found in large cities. Considering this scenery, the work evidences the importance of knowing better the solution of foundation in radier staked, as its repressions occur, in order to rationalize the choice of the designer. The settling of stacked radiers, obtained from the combination of different factors, such as: the thickness and the geometric form of radiers, the number and diameter of cuttings and soil modulus of elasticity were evaluated, conferring to the implantation of the foundation studied in soils sandy, fluffy, medium-sized and compact. For the simulation of the 288 combinations of the above mentioned factors, three-dimensional (3D) analyzes were used by finite elements, through the ELPLA computational program. From the results are obtained estimated values of average and the coefficient of variation according to the parameters assigned to the combination. The effects indicated that the higher the modulus of elasticity of the soil, the lower the values obtained from the settlements; that the thickness of the radier is the geometric factor that exerts greater influence in the variation in the beliefs of the differential pressures; the diameters of the cuttings play an irrelevant influence on the variation of the amount of repression; the inclusion of cuttings may not mean that there will be a decrease in differential or total balances. In this study, for square radiers with L / B = 1 the ideal quantity was 20 stakes and for square radiers with L / B = 2, the ideal quantity was 40 stakes, being therefore fundamental a previous study to determine the optimal amount of stakes for each thickness and radier size.