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Gabions with geotextiles

When gabions are used in a water environment, e,g,.as channel linings, the water flows through the voids in the gabion rock fill. The backfill to the gabion structure could then be washed away by the water flow. To limit this wash out, a geotextile should always be placed behind a gabion structure in this environment. The geotextile stops the fine soil particles from being washed through the gabion unit where they are lost downstream. It is also recommended on dry structures to stop fine particles from moving through the unit.
Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain. Typically made from polypropylene or polyester, geotextile fabrics come in three basic forms: woven (looks like mail bag sacking), needle punched (looks like felt), or heat bonded (looks like ironed felt).
Geotextiles required to be installed behind or underneath the gabion structures. Geotextiles gabion shall comply with the requirements of the project specification.
Geotextiles on gabion walls more effectively hold back the earth or filler. They might have well suited permeability or retentive qualities for gabions. Gabions are also used in dams, embankment and so on. In this case, geotxtiles might have good properties for being submerged in water and still retaining whats inside the gabions.



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