Khadagzai Bridge Abutment Slope Protection, erosion protection structures or armor systems dissipate the hydraulic forces that cause erosion, and they preserve the subgrade soil or fill soil behind it. A typar is required between the subgrade soil and the rip-rap, gabions or pre-cast blocks to prevent piping and erosion of the soil while allowing the free passage of water.
The primary function of the Typar geotextile in erosion control is filtration to minimize erosion of the subgrade soil behind the armor system.
Erosion control: The erosion process is part of the geological cycle, a natural phenomenon, wherein water and wind are particularly aggressive factors causing soil erosion. A geotextile is used as part of an erosion-control system to protect the soil (marine embankment slopes, riverbanks, bed protection) from this influence. Depending on the water’s force (flow rate, wave action, tidal surges) and the characteristics of the soil, the effects can be devastating (e.g. landslides).
The main function of the geotextile in an erosion-control system is the retention of the base material without the generation of unacceptable excess pore-water pressure. The geotextile replaces a conventional well-graded filter between the soil to be retained
and gabions, rip-rap or concrete-slab revetments, which protect the filter geotextile. Its particular opening size retains the soil and so avoids erosion of the slope. Furthermore, the geotextile must satisfy strength requirements.