METHOD FOR INJECTING RUST-PROOFING AGENT AQUEOUS SOLUTION INTO CAVITY INSIDE PC TENDON INSERTION SHEATH IN EXISTING PC STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a rust-proofing agent aqueous solution injection method by which a rust-proofing agent is supplied to an inside of a cavity unfilled with grout inside a PC tendon insertion sheath such as the cavity inside the sheath of a PC tendon fixing portion side in an appropriate state in response to status of the cavity.SOLUTION: A rust-proofing agent aqueous solution injection method comprises the steps of: measuring a degree of sealing of an upper end of a grout-unfilled cavity 12 prior to injection work of a rust-proofing agent aqueous solution when injecting the rust-proofing agent aqueous solution into the grout-unfilled cavity 12 of a PC tendon insertion sheath inclined portion of an existing PC structure; and selecting and using a method for injecting the rust-proofing agent aqueous solution in response to a case where the upper end of the grout-unfilled cavity 12 is in a sealed state and a case where the upper end thereof has air permeability.