Obtenção da resistência não drenada e coeficiente de adensamento horizontal através de ensaios de cptu e palheta

Abstract

The study in this paper is about the application of the method presented by Mantaras et al., (2014) for calculating the resistance undrained shear (Su) with the intention of comparing the values found through this geotechnical correlation values derived from vane tests made in the neighborhoods of Barra da Tijuca and Recreio, RJ. In parallel, they present the values of horizontal coefficient of consolidation, estimated based on the method proposed by Teh and Houlsby (1991). For both correlations were used the results of dissipation of excess pore-water pressure curves of CPTU tests. Eighteen different kind of deposits of soft clay were studied, where were made the Vane and CPTU tests. The results showed that there was a good correlation between the Su values obtained with the method proposed by Mantaras et al. (2014) and Su values obtained with the Vane test, this correlation can be recommended for use in pregeotechnical projects. However Ch values showed typical values of soft clay. Finally, the paper presents a collaboration to understand the importance of applying geotechnical correlations for prior knowledge of the geotechnical behavior of soils.