MARTINS, J. N.; http://lattes.cnpq.br/5061166483067780; MARTINS , Jessiane Nunes.
Resumo:
Shallow foundations are structural elements of widespread use in engineering. However, its use
is limited to the availability of land and the conditions in which this soil presents itself. In view
of these facts Thomé (1999) studied the use of carbide lime and heavy ash in the reinforcement
of soil for the base of shallow foundations through plate tests with 0.30m in diameter in landfills
with the material reinforced in layers of 0.15m, 0.30m and 0.60m. In order to evaluate the
applicability of the method, it is necessary to analyze these results by comparing the predictions
of the bearing capacity of these foundations using classical calculation methods such as those
by Terzaghi (1943), methods applied to stratified soils such as: Purushothamaraj, Ramiah and
Rao (1974) and Vesic (1975) Meyerhof and Hanna (1978) and the methods developed
specifically for shoes seated on stabilized soil reinforcement: Foppa (2016) and Caballero
(2019). This study allowed us to observe that the more the reinforcement increases its thickness,
the greater the bearing capacity of the foundation resting on it. However, for the parameters of
natural soil and reinforced soil studied by Thomé (1999), the predictions of load capacities
according to the methods used showed little variation in resistance gain with the increase in the
thickness of the reinforced layer. Even so, the methodologies of Vesic (1975) and Meyerhof
and Hanna (1978) proved to be acceptable to the bearing capacity forecast because they
presented lower values than the load tests of Thomé (1999) and predicted, although small, the
increase of resistance as the reinforcement gains thickness. However, the methodology of
Purushothamaraj, Ramiah and Rao presented values of 3.17, 1.58 and 1.30 times greater than
the load tests of Thomé (1999), making its use impracticable, as it overestimates the bearing
capacity of the soil reinforced. Likewise, the methods of Foppa (2016) and Caballero (2019)
also showed inconsistencies in the prediction of bearing capacity as they were developed for a
type of soil that does not fit the studied soil profile. Therefore, it is concluded that despite being
widely used and used, the bearing capacity forecasting methodologies are still insufficient in
considering all the factors that influence the increase in the resistance of soils that have been
reinforced with cementing materials. To this end, it is still necessary to study the topic further
and improve, as far as possible, the ways of predicting the bearing capacity in these soils.