Grout re- injection how to grout unfilled cavity of PC tendon within the insertion sheath

摘要

PROBLEM TO BE SOLVED: To provide a method for re-injecting grout by which the grout can be sufficiently re-injected even into a portion having a small gap such as a grout unfilled cavity generated in the vicinity of a fixing end portion of a PC tendon and filling status of re-injection grout can be easily checked from an outside thereof.;SOLUTION: When re-injecting re-injection grout into a grout unfilled cavity positioned at an inclined portion or a vertical portion of a PC tendon insertion sheath in an existing PC structure, a method for re-injecting the grout comprises the steps of: using a tube for exhaustion and a check on filling that is provided with a re-injection grout detection sensor at a leading end; inserting the tube for the exhaustion and the check on filling into the grout unfilled cavity; causing the leading end thereof to reach an upper end of the grout unfilled cavity; injecting the re-injection grout from a lower end side of the grout unfilled cavity by one-way injection by using the tube for the exhaustion and the check on filling as an exhaust hole; and checking grout filling at the upper end of the grout unfilled cavity by detection of the re-injection grout by the re-injection grout detection sensor.;COPYRIGHT: (C)2014,JPO&INPIT