Milling removal device and grinding method of removing the existing pile of existing pile

摘要

The present invention can correspond to a single screw earth auger apparatus of the generic type, to provide a grinding method of removing grinding removal apparatus and the existing pile of the existing pile can be reduced equipment cost. A casing 11, so as to cover the periphery of the auger head 12 attached to the tip of the auger screw 13, is fixed to the distal end portion of the auger screw 13, to rotate with the auger screw 13. Casing 11 is to be cut the outer periphery of the pile 1 when it is inserted into the ground around the pile 1 while rotating the drilling, the inner peripheral surface of the front of the auger head 12, a plurality of inner projecting toward the central axis having a cutter 22. Auger head 12, when the casing 11 to cut the outer periphery of the pile 1, to rotate along with the auger screw 13, grinding the pile 1 from the head. Auger screw 13 is rotatably provided so as to carry-out the ground product pile 1 which has been crushed by the auger head 12 to the ground.FIELD 1