PILE Russian patent published in 2004 - IPC

FIELD: piles increasing in cross-section along their length, particularly for foundation building in stratified soil.

SUBSTANCE: pile has body with extensions arranged along pile length. Extensions have conical or pyramidal surfaces expanding towards pile body head. Distance h_i measured along pile body axis between projections of lower extension surfaces ends onto above axis is determined by a given correlations, wherein magnitude of taper angle of lower extension surface should be not less than that of inner soil friction angle.

EFFECT: increased pile bearing capacity along with reduced material consumption.

6 cl, 5 dwg