PILE EXTRACTION JIG AND PILE EXTRACTION METHOD

摘要

PROBLEM TO BE SOLVED: To enable extraction of the whole pile by using a cylindrical casing provided with a hollow part inserted down to the embedding lower end of the pile and a slinging work member locking tool provided on the outer peripheral face of the cylinder casing. ;SOLUTION: The length of a cylindrical casing 12 is longer than the embedded length of a pile, a cross section outside diameter is set larger than the pile, and a hollow part is formed. A slinging work wire 17 is wound around the lower end outer periphery of the casing 12, which is inserted from upward of the pile in a state locked on slinging work member locking tools 211-213 provided on the outer peripheral face of the lower end, and the pile is inserted while vertical vibration is applied. The easing 12 is settled while vibrating, friction force with peripheral soil is cut off, and the slinging work wire 17 follows up the easing 12 to reach the lower end of the pile. When the slinging work wire 17 is pulled upward after the easing 12 is pulled from the pile, the whole pile can be pulled easily. At the time, since the slinging work wire 17 has no friction with the pile and the easing 12, an attaching position for the pile does not change without wear and breakage.;COPYRIGHT: (C)1999,JPO