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| Environmental solutions
> Confinement |
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Many factors are responsible for
embankment and slope instability. One of the reasons is that present construction space is
limited, requiring marked slope inclination. In other cases, vegetation removal, storms
and sub-surface water may create instability on previously immobile slopes. These
conditions usually lead to degradation on the slope surface or even deep instability.
There are various alternatives to stabilize such slopes, depending on the affected
material and the consequences of instability. The surface process and general instability
must be independently established to define an efficient corrective measure.
Surface instability involves sediment carriage by gravity in the form of soil, mud,
fragments or rocks. General slope instability involves the movement of material that has
separated along a weakness zone. |
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1. Slope showing general
instability with landslides, movement of material and general erosion.
2. Same slope after recovery and protection with nailed green soil and
anti-erosion biodegradable blankets.
3. Same site three months after slope recovery and protection,now fully
re-vegetated and with no erosion gullies. |
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1. Slope with geotechnical
instability, general erosion, slides and significant sediment carriage.
2. The nailed green soil technique was applied using the Fibrax Screen®
400BF bidimensional coconut fiber anti-erosion biodegradable blanket.
3. Same site after completion, demonstrating efficiency, visual
improvement and resolution of environmental factors such as water infiltration, excess
solar radiation and temperature. |
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1. Slope with rupture and sliding,
to be recovered and protected with the nailed soil technique.
2. After nail application on the slope, erosion is being corrected and
filled with Bermalonga® D20 type sediment retainer rip-raps.
3. Fibrax Screen® 400BF application after erosion treatment; also show
is the high strength metal mesh metal plate anchored to the nails. |
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