Caracterização da resistência de um solo tropical a partir do ensaio de penetração dinâmica de cone com energia variável (panda)
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Data
2014-08-08
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Universidade Federal de Goiás
Resumo
Get soil resistance is critical to making any geotechnical design with confidence, thus,
laboratory tests are used to determine the strength and deformability of the ground in discrete
points involved in the volume of soil mass. Due to heterogeneity of soil formation is that field
trials are needed to supplement this determination and enrich the bank information. Field trials
were able to identify and estimate the mechanical parameters of the soil, an adequate prediction
of the behavior of retaining structures, excavation, foundation, floor sizing, etc., and determine
the characteristics of the soil profile, and have was used to estimate the mass of strength
parameters involved ground. In this sense a new tool for the characterization of the soil profile
from dynamic penetration of a metal cone with variable energy (PANDA) has been studied to
find a relationship with the strength parameters of a tropical soil obtained in a vertical slope of
about 4, 0 m high, located in Alexânia - GO with sandy visual tactile characteristics. Therefore,
we performed PANDA tests up to 4.0 meters and determining the moisture profile through a
survey to auger up to 3.70 meters and laboratory characterization tests were performed,
determining the strength parameters in natural moisture condition and flooded , deformation
parameters and determination of soil water characteristic curve (CCSA). PANDA the results
were compared with the laboratory tests for this ground and found a range of variation between
them always considering the trials of natural moisture condition. With the results it was possible
to see the influence of suction in the PANDA test. In terms of resistance parameters was
possible to find a friction angle of the relationship with the penetration of energy (qd) for this
soil. Overall the strength parameters showed the same trend as the qd values obtained by
PANDA compared with respect to depth. Finally, with the results it is recommended to carry
out further testing on different soil types in different humidity conditions to improve relations
found and increase the database.
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Citação
DIEMER, F. Caracterização da resistência de um solo tropical a partir do ensaio de penetração dinâmica de cone com energia variável (panda). 2014. 223 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2014.