The pile driving technique is powered by pneumatic or diesel pile drivers of which the dynamic weight is driven by hydraulics. By pulsating load on top of the sheet pile, the critical frequency is being passed and the sheet pile is driven into the soil. This technique is mainly used for the driving of piles and solid caissons, especially in cohesive soils and fine-grained soils including silts and clays. What pile driver to use, is depending on the soil conditon, working depth and strength of the sheet pile wall. For plastic and composed sheet pile walls, there are special pile drivers on the market with less impact pressure in order not to damage the elements. Pile driving can also be done by a conventional drop hammer, with or without steel framework.
(This article comes from PVE Piling & Vibro Equipment editor released)