Dimensionamento geotécnico e estrutural de cortina atirantada – estudo de caso

Abstract

The technique of stripping, developed in the 1950s in Europe, consists of a writers job to stabilize soil masses, making up a wide range of applications of the technique, where, as a result of the growing disordered urban centers, a rod for containment of slopes is in expansions, being denominated cable-stayed curtain. The principle of operation consists in the insertion of data - linear elements that transmit the external processes of traction to the mass of ground - anchored in the passive zone of the massif, a minimum safety company pre-defined by the anchor regulation standard ABNT NBR 5629 : 2006 - Execution of ropes anchored in the ground, in which the rods are pre-dimensioned, push the vertical facing against the ground, in order to guarantee their stabilization. A design of a reinforced curtain, commonly composed of unbarred reinforced concrete and steel anchoring rods, requiring prior soil parameters, in order to enable structural dimensioning as the characteristics required for containment of the slope. In this scenario, the objective of this work is the presentation of several methods of containment methods, with emphasis on the rope curtain technique, presenting proven methods of slope stability analysis, empirical methods to estimate the limit load capacity of anchors, besides the dimensioning reinforced curtain. In view of the studies carried out, the case study comprised the geotechnical and structural design of a wire mesh curtain in the central region of the city of Belo Horizonte / MG, in a problem situation presented by Vasconcelos (2016). The analysis of the slope safety factor, as well as the safety condition for the methods, methods of analysis of the load bearing capacity limit of anchorages was carried out from the software Geostudio 2012, module Slope / W by the method of Morgenstern and Price, Uma stress analysis of another edition of the use of Geostudio 2012 software, Sigma / W module, enabling the structural dimensioning of the embedded wall in formulations pre-defined by ABNT NBR 6118: 2014 - Design of concrete structures - Procedure.