Filtration layer is used in civil application to remove moisture or fine particles from the system. A filter should prevent excessive migration of soil particles, while at the same time allowing liquid to flow freely through the filter layer. Filtration helps in the following ways :
Geo textile drains comprise of three key elements- a filter fabric, a free draining core and an impermeable membrane which act as a conduit for the movement of liquid or gases in surface of geotextile.
Typical application use:
The function of a geotextile separator is to maintain the integrity of the material and to allow the release of water pressure through and within the geotextile. It reduces maintenance, enables better compaction and thickness.
Role of a geotextile separator:
The total system strength is increased by the introduction of a geotextile into a soil and developed primarily through the following three mechanisms:
In this method, the structural stability of the soil is greatly improved by the tensile strength of the geotextile. Protection function allows embankments and roads to be built over very weak soils and allows for steeper embankments to be built.