DRILL HEAD FOR THE EXCAVATION IN THE GROUND OF A PIT, AND A FOUNDATION SYSTEM FOR THE FORMING OF A FOUNDATION PILE IN THE GROUND

摘要

A drill head for the excavating in the ground of a pit, in particular a pit to be filled with a hardenable mass, for the forming after hardening of a foundation pile, comprises a housing (31) having a drive shaft (35) which is rotatable with respect to the housing (31), a first drive unit (33) for the driving in rotation, by means of driving of the drive shaft (35), of at least one first digging member (36) positioned on one side of the drill head (30) being provided in the housing (31). Furthermore, a second drive unit (51) for the driving in rotation of at least one second digging member (50) positioned on the other side of the drill head (30) is provided in the housing (31).