... 2 river canal, seacoast, 3 concrete slope, 4retaining walls. geotextiles can be the filtration layer of the dykes ... , river canal, seacoast, concrete slope, retaining walls. At the same time of preventing the clay granule ... , backfill soil of retaining wall, slope protection, etc in which distributes the earth stress, prevents the side-displacement ... 9.9 Non-woven geofabric used in road construction