| 摘要 |
PROBLEM TO BE SOLVED: To improve the adhesiveness of sprayed mortar to an existing sprayed material (to be repaired) by performing cleaning treatment of a surface of the existing sprayed material, driving a desired number of anchor pins from the surface of the sprayed material to a slope surface, and spraying repairing mortar to the surface of an adhesive film formed on the surface of the sprayed material so as to have a predetermined thickness. SOLUTION: An injection pipe 13 is driven from the surface of a sprayed material 11 to a cavity portion 12, and a predetermined kneaded grout 14 is fed as a filler from the injection pipe 13 to the cavity portion 12. Next, the surface of the existing sprayed material 11 is washed by splashing jet water or the like, and then a suitable number of anchor pins 16 are driven from the surface of the existing sprayed material 11 to a slope surface 15. At this time, a head edge of each anchor pin 16 is protruded from the surface of the existing sprayed material 11. Thereafter, an adhesive film 17 is applied onto the surface of the existing sprayed material 11 in order to impart the adhesiveness (stickiness) thereto. Then, mortar 18 or the repairing spraying material is sprayed on the surface of the existing sprayed material 11.
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