Plastic micro packer and construction method using it

摘要

Disclosed are a plastic micro packer for repairing cracks of structure and a method for repairing middle or low pressure cracks using the plastic micro packer: The micro packer is connected to a hole formed in a crack to inject, repairing solution into the crack of a concrete structure, and includes: a hollow rubber sleeve having a screw portion formed on the inner surface thereof; a hollow packer body having a screw coupling portion screwed with the screw portion and a nozzle portion connected to a repairing solution injector; and a cove; member connected to the nozzle portion to prevent leakage of repairing solution. The screw portion of the rubber sleeve has a wide top and a narrow bottom, and thereby, is closely contacted to the hole while the lower portion of the screw portion is expanded in a radial direction when the screw: coupling portion is screwed with the screw portion. A flange portion is formed at the front end of the rubber sleeve to prevent excessive induction of the rubber sleeve into the hole.