PPROBLEM TO BE SOLVED: To provide a repairing method with good workability, capable of repairing a decrepit slope protection without operation for setting a new lock bolt. PSOLUTION: A head member 2 is screwed and connected to the head side of a lock bolt 1, and a fastening nut 6 is screwed to a female thread formed on the outer surface of the head member 2 to fasten and fix a structure 12 to be installed on the slope. In repairing, an extension bolt 4 is screwed and connected to a female thread formed inside the head member 2, a repairing structure 14 is constructed on the structure 12, and the fastening nut 16 is screwed to the extension bolt 4 to fasten and fix the repairing structure 14 through the extension bolt 4. PCOPYRIGHT: (C)2011,JPO&INPIT
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