Análise numérica do efeito de sobrecargas assimétricas em estacas: estudo de pontes nas obras do Arco Metropolitano.

Abstract

The current paper is on asymmetrical overloads effect on stakes, through the case study of Capivari River Bridge s encounters in Metropolitan Arch s works. In this particular case, the stakes were built before embankments were made on reinforced land and, the soil was reinforced with stone columns and to minimize the Tschebotarioff effect. Finite Element Method was analyzed based on the bibliographic review submitted. This analysis, carried out by the computer program Plaxis, had as the main focus to obtain the displacements and bending moments in the stake without stone columns and equivalent homogeneous soil (with stone columns). Verifying the influence of the introduction of stone columns to reduce bending moments and horizontal displacement in stakes encounters was possible. A simulation was carried out in which the stakes would be built after the completion of embankments on "reinforced land" where the asymmetrical overloads effect would be mitigated can be seen. Also, a comparison among displacements from data collected from the field instrumentation (inclinometer) and those obtained by numerical analysis was made, they are compatible among themselves, showing that the methodology used for simulation of stone columns in Finite Element Method was appropriate.