METHOD FOR BORED PILE ERECTION Russian patent published in 2008 - IPC E02D5/56 

FIELD: construction, particularly to erect industrial and civil buildings and to reconstruct existent foundation, as well as to construct supports taking alternating loads in grounds of any type.

SUBSTANCE: method involves creating pilot pile in well by well drilling along with cut ground carrying to ground surface with the use of auger drilling assembly provided with rock-cutting tool to be removed from well and device with extendible rock-compacting member, which creates annular cavities in pilot well wall in load-bearing ground layers in accordance with geological section; connecting said sections with each other through vertical cavities arranged in planes transversal to pile axis, wherein the vertical cavities are arranged in staggered order in planes parallel to pile axis.

EFFECT: increased load-bearing ability of the pile in any ground surroundings and in confined space.

3 cl, 3 dwg