VIBRATING-ROTATING PILE DRIVER AND VIBRATING-ROTATING PILE DRIVING METHOD

摘要

PROBLEM TO BE SOLVED: To drive a pile even into a hard stratum without pollution by improving a rotary spiral pile driver.;SOLUTION: An exciter 10 having a pile chuck 11 is installed on a turning base 4, and the turning base 4 is supported rotatively about a Z axis by a stationary base 2. When a pinion gear 18 is turned by driving a turning driving motor 17 installed on the stationary base 2, the turning gear 19 is turned about the Z axis to turn the turning base 4 and a turning arm 9 secured to the gear 19. Thus, the exciter 10 and the pile chuck 11 are turned with the arm 9 so that a building foundation pile 1 with the spiral-shaped tip section held by the chuck is turned about the Z axis and spirally driven into the ground. When the pile reaches the hard stratum and becomes hard to advance spirally, the exciter 10 is actuated to give the pile vibration for promoting rotary spiral advance.;COPYRIGHT: (C)2006,JPO&NCIPI