THE POSTTENSIONING APPARATUS FOR REINFORCING CONCRETE STRUCTURE USING BORESCOPE AND UNBONDED STRAND HAVING THE SELF-PREVENTION FUNCTION OF CORROSION AND, METHODS FOR MAINTENANCE OF CONCRETE STRUCTURE USING THE SAME

摘要

PURPOSE: A post tensioning apparatus for reinforcing concrete structure and a maintenance method of a concrete structure using the same are provided to eliminate a filling proves with grease inside a duct using a tendon consisting of an unbonded strand. CONSTITUTION: A tendon(11) is arranged inside a sheath tube. The tendon is made of an unbonded strand(10) including an itself - corrosion preventing function. The unbonded strand is coated to an epoxy. A strand(50) for transferring a camera is arranged on a space between the tendon and the sheath tube. A debater(14) is arranged on a connection unit of the sheath tube and an anchor trumpet.