Geoscience Reference
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Figure 6 Normalized horizontal displacements versus average slope. (From Sembenelli
and Sembenelli, 1998.)
In order to better analyze the data collected at the Verrand Embankment, a
plot of the displacement velocity versus time has been drawn, as shown in Fig. 7 .
A typical curve connecting a series of points is also shown in the diagram. The
displacement velocity curve generally lays in the lower part of the cloud of
points. The sharp peaks indicate that a new load has been added. It is interesting
to note that generally the decay of the curve toward the prepeak values is quite
rapid. The prevailing displacement velocity is hence well represented by the
lower envelope of the data shown in the figure.
Data obtained from Verrand suggest that the displacement velocity falls
from 40mm/month, during the first month, to about 0.7mm/month, after 10
months (1 year), and to about 0.01mm/month, after 100 months (10 years). The
above values compare with typical results of rock-fills, for which displacement
velocities are 1 to 2mm/month, after 10 months, and 0.05 to 0.2mm/month, after
100 months (Parkin, 1991).
 
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