Volume 6, Issue 6 (Suppl)
J Geol Geophys, an open access journal
ISSN: 2381-8719
Soil Science 2017
December 04-05 2017
Page 19
conference
series
.com
December 04-05, 2017 | Madrid, Spain
Annual Congress on
SOIL SCIENCES
Vladimir L Andreev, J Geol Geophys 2017, 6:6(Suppl)
DOI: 10.4172/2381-8719-C1-013
Stress state of a soil array at break of the pipeline
T
he rupture of water and sewer pipes leads to numerous accidents (subsidence, swelling, etc.). This is especially characteristic
for clay, loess, peat and other soils. We consider the stress state of clay array at different models on fluid propagation
from a fracture site. Accordingly, the problems are solved in cylindrical and spherical coordinates. The problem is solved
by the methods of stationary and non-stationary moisture elasticity. The feature of the calculation is the accounting of the
inhomogeneity of the clay during moistening. Figure 1 shows the dependence of the clay deformation modulus on moisture.
Depending on the depth of the pipe where the fracture occurred, the ground pressure can be considered axisymmetric (large
depth) and non-axisymmetric (small depth). Accordingly, one-dimensional and two-dimensional problems of moisture
elasticity are considered. Analytical and numerical-analytical solutions are obtained. An analysis is made of the convergence
of the Fourier series as a function of the number of terms in the series. As a result of calculations, it was found that taking into
account the inhomogeneity caused by the change in the deformation properties of bodies leads to a significant change in the
stress state of bodies compared to the calculation of homogeneous bodies. In clay soils, against the background of a marked
reduction in the peaks of compressive stresses, the most dangerous maximum tensile stresses for a cylindrical model increase
by 53%, and for a spherical stress increase by 38%.
Recent Publications
1. Andreev V I and Avershyev A S (2013) Elastic-plastic equilibrium of a hollow cylinder
from inhomogeneous perfectly plastic material. Applied Mechanics and Materials
405-408:3182-3185.
2. Andreev V I and Avershyev A S (2013) About influence of moisture on stress state
of soil taking into account inhomogeneity. International Journal for Computational
Civil and Structural Engineering 9 3 14-20
3. Andreev V I and Avershyev A S (2014) Nonstationary problem moisture elasticity
for nonhomogeneous hollow thick-walled sphere. Advanced Materials Research 838-
841:254-258.
4. Andreev V I and Avershyev A S (2015) The Stress State in The Rock Mass Exposure to
Moisture and Temperature Fields. Procedia Engineering 111:30-35.
Biography
Vladimir I Andreev is a Head of Department Strength of materials at National University Moscow State University of Civil Engineering. He is also an Professor, Doctor of
Technical Sciences, full member of the Russian Academy of Architecture and Construction Sciences (RAASN), a member of UMO universities of Russia for education in
the field of construction. He is an Honored Worker of Higher School, member of the Russian National Committee on Theoretical and Applied Mechanics and Honorary
professor at the Warsaw University, honorary builder of Russia.
asv@mgsu.ruVladimir I Andreev
NRU MGSU, Russia
Figure 1: Dependence of the soil deformation
modulus on moisture:1-loam and clay; 2-sandy
loam.