Adensamento unidimensional com fluxo radial considerando a viscosidade dos solos e a compressão secundária

Abstract

Over the years, several studies have been carried out to understand the phenomenon of secondary compression. The most consistent studies point to the viscosity of the adsorbed water as being responsible for secondary consolidation. The effective stress would be divided into two parts: the first one of a viscous nature and the other transmitted through the so-called solid-to-solid contact. In this thesis theories of radial flow consolidation were developed taking into account the viscous effect as a key part of the process. The cases of free strain and equal strain were considered. In the case of equal strain, two theories were developed, one for constant viscosity coefficient and another for variable viscosity coefficient. The results showed that the viscosity has a significant influence on the curves of the average degree of consolidation over time. The variable viscosity coefficient approach was able to reproduce the "double wave" effect observed in long-term laboratory tests and it can be related to the ratio between primary and total settlement.