Reforço de fundações com solo cimento: dimensionamento e orçamento.

Abstract

The method of soil stabilization through the use of cement is one of the solutions to enable the construction of buildings in regions where the soil has low support capacity. This method is carried out by mixing natural soil with cement, dosed at a percentage of project and compacted, making it acquire a much higher resistance and allowing an increase in load capacity. In this work, a series of methods for predicting the carrying capacity for the use of cement soil were studied, in order to understand which would be the most suitable for the soil in the region of Cachoeirinha-RS. With the comparison of methods, it was found that the closest to the test load values of Sales (1998) was the method of Meyerhof (1976), after it, two fictitious columns loaded with 300 KN and 1400 KN, respectively, were used for the dimensioning of reinforced concrete shallow foundations. The objective was to analyze two distinct situations, submitted to natural soil and cement soil with 5% cement content and 60cm reinforcement layer thickness. With the design completed, 4 different shallow foundations were generated, Shoes 1 and 2 in natural soil, with dimensions of 70 x 70 x 45 x 10 cm and 180 x 140 x 55 x 15 cm, respectively. For the cement floor, Shoes 3 and 4, with dimensions 60 x 60 x 45 x 10 cm and 120 x 100 x 55 x 15 cm respectively. From these dimensions, budgets were generated using the TCPO method, using the SINAPI cost base for the month of June/2021 in the state of Paraíba. With the budget, the values of R$ 292,38 and R$ 255,86 were found for Shoes 1 and 3, with a reduction in the total value of 12% from the base in natural soil to the base in cement soil. For Shoes 2 and 4 the values were R$ 2.007,82 and R$ 1.056,58, representing a reduction in the total value of 47%. Thus, it was found that the use of the method enables constructions on soils with low load capacity, in addition to generating a satisfactory total economy, mainly on bigger loads, where it was found a much more significative reduce in total price than on smaller loads.