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Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
(a)
(b)
Figure 7. measured and computed displacement of unreinforced model
The comparison between the computed and observed
displacement both in the horizontal direction and in the vertical
direction for the reinforced embankment are shown in Fig.8.
The computed displacement is quite close to the observed
values for both lateral displacement and vertical displacement.
(a)
(b)
Figure 8. Measured and computed displacement of reinforced model
The behavior of reinforced embankment and unreinforced
embankment was successfully investigated using centrifuge
modeling and finite element analysis. The comparisons between
the centrifuge tests and computed results indicated the utility of
fibers can enhance overall stability of embankment. For the case
of reinforced embankments with fibers, it was found that the
deformation, the magnitude of stress, and their variation range
was considerably less than those for unreinforced case. Also,
the fiber reinforcement constrained the lateral displacement
effectively, and the distribution of stress and deformation was
harmonious comparing with the unreinforced.
When using geosynthetic fibers to reinforce embankment, it
also shows two advantages: (1) reinforced embankment can
resist cracks due to the network of intertwined fibers, and(2) the
fiber reinforced soil is closer to a homogeneous, isotropic
material than unreinforced soil.
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