EXISTING PILE CRUSHING AND REMOVING METHOD AND ITS DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method capable of conveniently and easily removing the existing pile at a reduced working space and its device in work for rebuilding such as building or the like by destroying a footing structure. ;SOLUTION: The head end section of the existing pile P is crowned with a casing 2 connected to a kelly bar 8 to dig the circumference of the existing pile P with an excavation edge 13 wile rotating the casing, at the same time, the existing pile P is crushed with a drill head 25, crushed pieces are pushed upward of the inside of the casing 2 with spiral blades 28, and when a portion aside for an required depth is dug, cutting edges 16 and 16 of cutters 15 and 15 are pushed against vertical reinforcement inside of the existing pile P to cut off while continuing the rotation of the casing 2.;COPYRIGHT: (C)2001,JPO