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곽민구 ( Kwak Min-gu ),조성배 ( Cho Sung-bae ),곽병후 ( Kwak Byung-hu ),구엔닌투이 ( Ng Ninh Thuy ),박호완 ( Park Ho-wan ),권혁문 ( Kwon Hyug-moon ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
Researching is the development of auto lifting system in order to lift superstructure of in equal level. In other to reinforce girder or other bridge's part, those are lifting without unequal level of superstructure. For equivalent level lifting of superstructure, a number of E.D Jack connecting to the electric valve, installing distance sensor, controlling main-valve through measured displacement between superstructure and pier or abutment. Through testing two bridges, this system has a good effect on the lifting the bridge superstructure without any damage.