Patent KR-20060126200-A (KR)
Title: Fiber composite panel with tension head and concrete twofold strengthening method by post-tensioning using it
Inventor: PARK SANG TAE
IPC: E04G23/02
Filed: 2005-06-03
Abstract: A double reinforcement method of a concrete structure by external prestressing method using a tendon head and a fiberboard with the tension head is provided to promote strong anchorage by fixing a tension head to a concrete structure using an anchor bolt and sharing load bearing capacity with an anchorage column, and to minimize the damage of the existing concrete structure and to improve anchoring effect by laying a portion of an anchorage column under concrete and using as an anchorage. A double reinforcement method of a concrete structure by external prestressing method using a tension head and a fiberboard with the tension head comprises the steps of: perforating a hole for installing a column part of an anchorage column of a dead end anchorage zone to a concrete structure, and inserting an anchor hole to the hole; installing an anchor bolt to concrete corresponding to an anchor bolt insertion hole(501) of a tension head of the dead end anchorage zone; inserting an anchorage column to the insertion hole formed on the concrete through a rear round part(130) of the tension head; fixing a tension head of the dead end anchorage zone by coupling nuts with each anchor bolt; installing a tension device on the outside of a live end anchorage zone; inserting a guide bar of the tension device to a guide bar insertion hole(151) of the tension head of the live end anchorage zone and coupling with nuts; applying tensile force to the primary fiberboard by operating a hydraulic cylinder of the tension device; if the applied tensile force reaches the target, indicating the location of the tension head of the live end anchorage zone on the concrete surface; disconnecting the tension head and the tension device and forming an insertion hole of the anchorage column of the tension head on the marked concrete surface, forming an anchor bolt insertion hole in the insertion hole and forming a hole for an anchor bolt on the corresponding concrete to the anchor bolt insertion hole of a wing part(150) of the tension head; re-connecting the tension head and the anchorage column; applying tensile force to the primary fiberboard by operating a tension device; if the marked part of the concrete surface corresponds to the location of the tension head of the live end anchorage zone, inserting the column part of the anchorage column to the insertion hole formed on the concrete over the rear round part of the tension head, attaching an anchorage column support closely to the tension head, installing each anchor bolt and coupling with nuts; dismantling the tension device; forming anchor bolt insertion holes on various pots including both ends of a secondary fiberboard; applying adhesives on the facing side to the concrete of the secondary fiberboard; inserting secondary fiberboards to the dead end anchorage zone and the live end anchorage zone; and inserting anchor bolts to the corresponding concrete to the anchor bolt insertion holes of the secondary fiber board and fixing the secondary fiberboard with nuts.