Drainage of underground water flows at the bases of cuttings and embankments.

INTERDRAIN (GMG) FUNCTIONS

1. Interception and drainage of water flows (rain infiltration and underground water flows)
2. Draining water off to the sides.
3. Anti-pollution layer of fines

VIADRAIN FUNCTIONS

1. Cuts off and drains flows of water from the sides (neighbouring slopes)
2. Collects the water from INTERDRAIN.
3. Drains all the water to the drain pipe fitted at the bottom.