TUBULAR PILE Russian patent published in 2008 - IPC E02D5/28 

FIELD: construction, particularly pile foundations constructed of tubular piles having opened lower ends to be driven in ground.

SUBSTANCE: tubular pile has head with bulges on inner and outer sides thereof. Tube wall has perforation orifices formed so that spaces between the orifices decrease in direction away from head. The perforation orifices extend along tube and are in staggered order or tube wall has wedge-like depressions. Tubular pile may include pipe for liquid supply into head. Tube may have wedge-like bulges arranged from inner and outer sides thereof along the full tube length. The wedge-like bulges have pointed ends facing head. Bulge surfaces may be covered with antifriction material layer. Glowing members may be built in bulge interiors.

EFFECT: decreased power inputs necessary for tubular pile driving in ground and extended functional capabilities.

5 cl, 13 dwg