| 摘要 |
PROBLEM TO BE SOLVED: To provide a pile head treatment method etc., that suppresses noise, vibration, dust, etc., and is high in operability.SOLUTION: Pressure is applied vertically by inserting a hydraulic crusher 20 into a lateral rock breaking hole 11 formed in a boundary surface 17 between reinforcement concrete 5 and structure concrete 7 so as to vertically part the reinforcement concrete 5 and structure concrete 7. Then pressure is applied inward and outward by inserting the hydraulic crusher 20 into a vertical rock breaking hole 13 formed in the reinforcement concrete 5 so as to part and remove cover concrete at a part outside a main reinforcement 9. Furthermore, the hydraulic crusher is inserted into a vertical rock breaking hole 15 formed in the reinforcement concrete 5 so as to part concrete inside the main reinforcement into a concrete piece 21 as mentioned above. Then a column part 25 of a crushing tool 23 is inserted into a vertical rock breaking hole 15 adjoining the concrete piece 21 and a cutting edge 47 of a crushing part 29 is rotated toward the column part 25 so as to crush the concrete piece 21 with the cutting edge 47. |
