Análise da estabilidade de um piscinão para abastecimento

Abstract

Excavated tanks play a fundamental role as containment structures, especially for storing and supplying water, and are capable of retaining large volumes. However, the possibility of these structures collapsing poses serious environmental and economic risks for local communities, highlighting the urgent need to improve structural stability analyses. These analyses are intricate, as they involve the consideration of various factors during project development. Geotechnical parameters such as cohesive intercept and friction angle, along with geometries, play a crucial role in determining stability. From this perspective, numerical analysis software, such as Limit Equilibrium, has emerged as an essential tool for evaluating the stability of these structures more accurately, as well as providing a deeper understanding of the behavior of the massif. In light of this, the work aims to analyze the three-dimensional and two-dimensional stability of a water storage. To do this, the Rocscience software Slide3® and Slide2® were used, using established methods such as Bishop and Spencer, to obtain the minimum safety factors for the structure in different scenarios, such as without and with filling and rapid lowering. As a result, it was observed that, when compared with the current stability standard ABNT NBR 11682:2009, the reservoir presented factors higher than the minimum required and proved to be stable for all the scenarios analyzed.