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배현웅(Hyun-Ung Bae),강태구(Tae-Ku Kang),최진유(Jin-Yu Choi),정원익(Won-Ik Jeong),임남형(Nam-Hyoung Lim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
The continuous welded rail(CWR) track without the rail expansion joint has many advantages over the conventional track in a variety of fields including the speed-up and the ride comport. However due to the excessive axial force in the CWR and the track-bridge interactive behavior inevitably the rail expansion joint must be installed at the vulnerable zone such as the bridge end zone etc. In this rail expansion joint zone the frequency of the maintenance work to repair the track irregularity is on the rise. This is because that the creep of the sleeper is occurred in the moveable zone of the rail expansion joint. In this study among the several options for reducing the track irregularity on the rail expansion joint zone the application and efficiency of the tied sleeper is investigated. Field test construction has been conducted then the progress of the track irregularity and the frequency of the maintenance work are analyzed before and after the filed test construction.