METHOD FOR REMOVING UNDERGROUND BURIED PILE AND DEVICE FOR REMOVING UNDERGROUND BURIED PILE

摘要

PROBLEM TO BE SOLVED: To provide a technique for removing a columnar improvement pile buried in the ground surely and at a low cost.;SOLUTION: A method for removing an underground buried pile removes a columnar improvement pile P buried in the ground not including a reinforcement material or wire material by using a screw 11 fitted with a crushing bit 13. The method comprises a positioning step of setting the screw 11 housed inside a cylindrical casing 12 so as to be vertically movable and rotatable, in the upper position of the columnar improvement pile P, an excavation step of excavating the ground as the columnar improvement pile P is crushed by the crushing bit 13, by moving down the screw 11 together with the casing 12 while rotating the screw 11, and a discharge step of discharging a crushed material p of the columnar improvement pile P existing in the ground from the upper part of the casing 12, by injecting compressed-air from a base end side 11B of the screw 11 and jetting from a tip side 11A.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2016,JPO&INPIT