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고동춘(Go Dong-Chun),성덕룡(Sung Deok-Yong),공선용(Kong Sun-Yong),박용걸(Park Yong-Gul) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The main purposes of rail grinding are to improve the ride comfort, extend service life of rail, and reduce noise by preventing RCF(Rolling Contact Fatigue) defects. However, Kyung-Bu high-speed railway which has been applied to the rail grinding criteria of France high-speed railway has been used. In case of underground railway which has much passing frequency of train has been establishing the criteria of rail grinding based on experience. Therefore, this study performed metallographic structure, chemical component test, and micro-hardness test for specimens according to accumulated passing tonnage after rail grinding considering on the wheel rail interface condition of underground railway. As a result of this study, for new rail, it should be performed initial grinding about 0.3mm in order to remove de-carbonized layer and for used rail, when it performed preventive-cyclic grinding above 0.1mm/50MGT, RCF defects might be prevented.
레일 매립궤도의 특성과 노면철도에 적용 가능성에 관한 연구
이기승(Lee Ki-Seung),김성칠(Kim Sung-Chil),백진기(Baek Jin-Ki),고동춘(Go Dong-Chun) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
Embedded rail track can be described as a track structure that is completely covered within pavement. Rail supported continually on a concrete slab or concrete plinth. There are many kinds of types such as non-resilient track and resilient track, super resilient embedded track (floating slab). Embedded rail track is generally the standard for light rail transit routes because this track has many advantages such as reducing noise, maintenance cost and weight of track. In this paper, decision of track profile is restricted by the optimum levels of the flangeway and the gap between the rail head and the pavement surface of depressing tread zone. By result of this study, embedded rail track can reduce corrosion of rail, internal stress and rail deflection.