SYSTEM FOR BORED PILES CONSTRUCTION Russian patent published in 2008 - IPC E02D5/56 

FIELD: constructional engineering.

SUBSTANCE: system for bored piles construction concerns mining industry and can be used for buildings, bridges, trestle works, overpasses and other specific structures. The system consists of drill column, which, in its turn, comprises hollow stems and blade stem bit containing casing, blades and tapered tip with pilot-operated cutter. At lower end face of the bit casing in blade clearances there are opposite grooves arranged to house protruding element of tapered tip provided at its upper end face and taking torque and axial thrust on bit casing. Elements of tapered tip fixation assembly are rigidly mounted on the lateral surface of bit casing to interwork with the bit casing in on-position. The said elements of tapered tip fixation assembly are shaped as holed bar for clamps. The upper end face of tapered tip contains collars attached to the bit casing by means of wire ropes.

EFFECT: wider range of application of bored piles construction method; improved productivity and performance; reduced cost of piles production.

3 cl, 3 dwg