Injection apparatus for grouting using double packers

摘要

The present invention relates to a grouting injection device, which drills a grouting hole in four directions in a rectangular shape around an injection tube and inserts a rubber sleeve around the hole, and adheres both ends of the rubber sleeve to the injection tube with an adhesive, and is drilled in four directions. Cross marks are formed in the rubber sleeve at the position corresponding to the central portion of the hole.