METHOD FOR SCREW PILE DRIVING IN GROUND AND SCREW PILE DRIVEN BY ABOVE METHOD Russian patent published in 2005 - IPC

FIELD: building, particularly for building load-bearing foundations and securing different mechanisms and devices in ground, including permafrost ones, for driving metal tubular piles, preferably having diameters of 168 - 219 mm.

SUBSTANCE: method involves pressing pile in ground along with simultaneous driving thereof with the use of inner inventory key. Torque is initially applied to screw blade by inventory key and then as pile driving resistance increases pile shaft is also involved in torque transfer process, wherein exceeding of predetermined torque value to inventory key or pile shaft is not allowed. Screw pile comprises cylindrical tubular shaft with guiding cone, screw blade and seat formed in lower shaft part for inner inventory key installation. Shaft is formed of metal and has means for taking torque transferred from above key.

EFFECT: reduced material consumption due to providing two-stage torque transfer scheme, increased reliability of pile driving process and pile as a whole.

7 cl, 8 dwg