Emprego de tirantes para diminuição dos deslocamentos em contenção executada em solo grampeado.

Abstract

This undergraduate thesis has the purpose of analyzing the displacement reduction of soil nailing retaining structures, by adding ground anchors. It is known that this type of retaining structure is largely used due to the fact of being economically viable and being easy to do. Another common type of retaining structure is anchored walls. Despite the fact that this kind of structure is harder to execute and more expensive as well, it shows smaller displacements. Therefore, this thesis’ idea is to add ground anchors (main elements of the anchored walls structures) to the soil nailing structure in order to reduce the displacements. Four cases were evaluated. The first one, ground anchors were introduced after finishing the soil nailing structure. The other three, ground anchors were introduced together with the nails while building the structure, varying the height of installation. The slope stability was also verified by numerical analyzes, according to the active Brazilian standard ABNT NBR 11682:2009. Thus, the conclusion was that adding ground anchors is a great way to reduce displacements and increase the security of the surrounding structures. In addition to that, it also increases the security factor related to global and local stability, decreasing even more the chances of failure.