Behind the retaining walls we need drainage and filter layers to carry the water to the drainage holes or to the drainage pipes at the bottom.
In traditional methods we generally use gravel or sand as drainage layers.
Especially in residential areas the leakage water coming out off the holes of retaining wall doesn't wanted. It is not very good to see some muddy water and the stains of water.
Geocomposite drains are used behind the retaining walls to carry the water from the soil to the drainage pipe.
Geocomposite drainage products replaces the drainage and filter layers. So, it is better to transport to construction site a lightweight material and install it.
Geosynthetic drainage sheets should be manufactured by good quality filters to prevent clogging and also there should be a three dimensional drainage layer between the filters.