The reverse filter geotextile is the common geotextile, can permeate water, can not pass through the silt, plays the filtration function.

Reverse filtration means to keep the soil particles under osmotic pressure from losing while allowing the liquid to pass through.

As the direction of the filtered water is opposite, it is called reverse filtration.

To counter wrapped reinforced sand retaining wall provides the basis for design and construction, with iron wire netting and fiber screens of reinforced sand wrapped reinforced retaining wall for geotechnical centrifuge model test, the comparison and analysis the wall subsidence and metope level displacement and earth pressure inside the wall and reinforcement materials the changing law of strain with the increase of centrifugal acceleration, at the same time, should strengthen the connected to the upper geogrid geogrid, and to ensure that the buried in sand filling with enough length, avoid the failure in parts of the geogrids.

Lay a layer of anti-filter geotextile between the retaining wall filling sand and the anti-wrapping geotextile grille to avoid the anti-wrapping part being emptied.