Abstract: Method for construction of piles or caissons, which consists of drilling i.e. augering a borehole, deformating are carried by means of a neoprene or rubber hose or by means of a head unit for expansion. When connected with the pressure generator (27) which generates air or water under pressure, valve (26) opens, and pressure performs plastic deformations in the borehole. The hose, which is made of neoprene or rubber at the end of which there is a vulcanized cover (13), and which is of a suitable length and width, and has different stiffnesses of its walls are being accomplished by putting on bandages i.e. rings (11), is put on over a plastic or metal pipe (12), by means of which it provides supply of appropriate medium under pressure. The head unit for expansion consisted of a supply pipe and a rubber or neoprene gland reinforcement is inserted into the borehole and it is inflated causing deformations on the walls of the borehole.