Vertical drains are made up of a plastic core surrounded by a geotextile that acts as a filter to prevent clogging. There are various types of vertical drains (round and flat) and various sizes. Networks of drains are designed according to the type of ground and the degree of consolidation targeted.
Depending on the ground, static, dynamic or static-dynamic installation methods are employed. The machines used can conventionally install drains up to depths of about 50 meters. The mandrel is attached to a sliding mast, which is attached to the arm of an excavator or a crane.