| 摘要 |
PROBLEM TO BE SOLVED: To provide a device and a method for crushing and removing an existing pile and a foot protection which facilitate crushing of a foot protection and which can reduce construction cost.SOLUTION: A pile 1 installed in a ground is removed by an auger method in which an auger screw 13 inside the device with an auger head 12 at the tip thereof and a casing 11 outside the device are rotated in the mutually opposite rotating directions to excavate the ground. The casing 11 has, on its inner peripheral surface, a plurality of lower stage internal cutters 22a and 22b and upper stage internal cutters 23a and 23b projecting toward a center axis of the casing so that the outer periphery of the pile 1 is cuttable when the casing is inserted into the ground around the pile 1. The casing 11 has, on its outer peripheral surface, a plurality of external cutters 24 projecting radially so that a foot protection 3 is cuttable when the casing is inserted into the foot protection 3 around the pile 1 while rotating and excavating.SELECTED DRAWING: Figure 1 |
