Back Analysis Of Reinforced Soil Slopes
Author(s)
P. Procházka & J. Trckova
Abstract
Among the most popular reinforcement in soil mechanics of slopes is anchoring
and nailing. In our experiments nails are applied; they are penetrated into the
slope, it is loaded only by its volume weight. The material of the nails, as well as
that of the slopes, is known from laboratory tests. This circumstance influences
the distribution of stresses along the length of the body of the nail. Moreover, the
position of the nails to the stability of the reinforced slopes is observed. As the
experiments are carried out in scale models, similarity conditions have to be
obeyed. The technology of construction of experimental models is very
important. Similarity rules are applied, but in this case no additional tests on
physical equivalence of materials (real and that in the scale model) are necessary.
As is well known that slope stability is a phenomenon which underlies the
softening material behavior, i.e. the nonlinear behavior is concentrated along the
slip curve. All kinds of nails are fully active after their mobilization. A different
position of nails is considered to obtain the influence of this effect.
In numerical analysis and a priori integration method is fully used. Its
application enables one to decide relatively quickly if the slope is stable or the
measure of stability, the safety margin. Originally, the method was applied to
stability of both homogeneous and nonhomogeneous slopes, streaming water and
pore pressure influence on the slope stability. Here the influence of nails is
considered by additional slip force along the slip surface. The force is calculated
from comparison with the experimental data. The nails are introduced in such a
way that they are long enough to cross the most dangerous slip curve possible.
Keywords: nailed slopes, scale models, a priori integration method, back
analysis.
Keywords
nailed slopes, scale models, a priori integration method, back
analysis.
Related Book
Other papers in this volume
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