Name
Shmidt Oleg Aleksandrovich
Scholastic degree
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Academic rank
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Honorary rank
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Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 3
The object of the study is bored piles and their joint
work with clay soils. The analysis of the field of static
tests of bored piles, arranged by continuous flight auger
technology (CFA), was carried out by repeated loading.
Curve of settlement and the rate of its development
from the applied force was obtained. Linear relationship
reducing the amount of settlement in the second cycle
from residual displacements after unloading pile on the
first cycle was found. There was a relationship
increment of settlements in the second cycle from the
involvement of the bottom end in the work
Hardening of clay soil manifests in the form of
increase of the resistance of sample to shear
deformation. The shear tests of normally compacted
and overcompacted soils give values of peak strength
at small strains and long-term strength at high. A shear
test with constant strain rate of deformation (CRD)
with continuous recording of resistance encounters
uneven resistance change and the cyclical rate of
change of resistance (RCR). The identification of
cycles of the SIS allowed us to divide the deformation
in each cycle for elastic and inelastic, corresponding to
the ascending and descending branches of cycle. On an
interval of the total resistance, the increases of the
increment of inelastic strain are positive up to some
critical value of the total deformation of the sample at
which their sum reaches a maximum. This maximum
is adopted as a measure of hardening. With further
shearing of the sample, inelastic increments are
negative, and their sum is monotonously decreases and
reaches negative values for the total destruction of the
sample. This value is taken as the softening. A
symptom of total failure of the sample is the decline of
absolute values of inelastic increments of resistance to
zero. In general, the trend of the increments of inelastic
and elastic increments of the resistance of the sample indicates the development of the destruction of the soil
sample on the sliding surfaces and, in particular,
yielding of the total surface. The sum of elastic
increments of the resistance monotonically increases
throughout the shear
The filling piles and their joint work with soil are the objects of research. The joint working of filling piles and soil has been researched with the constant rate of loading (CRL) and the continuous measuring of deformations of physical model. The experiment was realized at the physical model of filling pile in soil with the apparatus AKP-6NM. The hypothesis of mechanical working of near-pile soil was proposed as the result of the experiment