Análise dos parâmetros de resistência de um solo melhorado quimicamente

Abstract

The guarantee of safety in geotechnical works is of utmost relevance, as collapses caused by their ruptures can result in material and human losses. Therefore, stability analysis of the slopes to be executed is crucial for road embankment works, for example. Many techniques can be applied to overcome instability situations, such as benching, geosynthetics, and retaining structures. One of the employed solutions is to improve the soil intended for the embankment body, in order to increase the shear strength parameters, corresponding to the angle of internal friction and cohesive intercept. Thus, in order to observe the influence that the chemical stabilizer dynabase transmits to the soil strength parameters, CU triaxial tests were performed with a mixture of clayey soil with 5% dynabase and 7 days of curing to determine the variation in angle of internal friction and cohesive intercept, comparing with the results available in the literature. A cementing behavior was observed in the stabilizer, providing the mixture with a 170% increase in the value of cohesive intercept and a slight increase in the value of angle of internal friction. Finally, when applying the acquired parameters in a slope section, an improvement of 65% was observed in the safety factor. It is concluded that the use of the tested chemical stabilizer with the soil used in the research promoted significant improvements in the cohesive strength component of the soil.