| 摘要 |
PROBLEM TO BE SOLVED: To provide a removal method for an existing pile, securing safety of work without loosening a ground around the removed existing pile, and leading a hole after the pile removal to application thereof conforming to a subsequent use purpose in a state that the hole is not collapsed.SOLUTION: In an existing pile removal auger method, drilling is performed by rotating an auger screw with an auger head attached to its tip and a casing on the outside thereof mutually in a normal direction and a reverse direction. A backfill material conforming to a purpose of subsequent utilization of a hole after the pile removal is prepared or a casing having a diameter conforming to the purpose of subsequent utilization is attached to the hole in advance, all of crushed materials are discharged to a ground by the auger screw, and the casing is left until back filling with the backfill material is completed. |
