PRECAST PILE Russian patent published in 2005 - IPC

FIELD: building, particularly pile foundations built on weak and collapsible ground.

SUBSTANCE: precast pile has body composed of trapezoidal sheets twisted in longitudinal direction relative axis of symmetry and bent along screw line with the use of conical mandrel. The sheet width decreases in longitudinal direction. The sheet sides are connected one to another along pile body perimeter so that hollow screw convergent conical surface is created over the whole pile body length. The conical surface has screw lines arranged along outer perimeter thereof and conical screw grooves formed on inner surface over the full pile body length, as well as cutting edges.

EFFECT: increased load-bearing capacity of the pile and simplified driving thereof.

2 cl, 6 dwg