Method for injecting repairing agent into concrete construction

A method for injecting a concrete repairing agent into a concrete construction comprising the steps of:

• forming an arcuate injection groove from an outer surface of the concrete construction, the arcuate groove having a first width and a depth;
• placing an injection plug device which injects the repairing agent into the concrete construction onto the outer surface of the concrete construction and over the injection groove;
• fixing the injection plug device to the arcuate injection groove while sealingly covering the arcuate injection groove;
• and
• pressurizingly injecting the repairing agent into the injection groove through the injection plug device, the injection plug device being provided with a base member for covering an open end of the arcuate injection groove ad engageable means engageable with the arcuate injection groove, the engageable means having a second width, which is smaller than the first width, before deformation thereof and a third width, which is larger than the first width, after deformation thereof, and
• the placing step comprising the steps of:
• inserting the engageable means into the arcuate injection groove,
• the fixing step comprising the steps of:
• deforming the engageable means after it has been inserted into the arcuate injection groove for engaging the engageable means with the arcuate injection groove;
• and
• mechanically urging the base member toward the outer surface of the concrete construction and around the open end of the arcuate injection groove and mechanically maintaining the urging to provide a hermetical seal between the base member and the injection groove.