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김인재(Kim In Jae),김시철(Kim Si Chul),양신추(Yang Sin Choo),한상철(Han Sang Chul) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Lateral resistance on ballasted track acts on lateral force under train running conditions and axial force resulting from rail temperature changes in order to enhance track stability on lateral direction. Lateral ballast resistance can be varied by the shape and material quality of sleepers as well as the size and shape of gravel. It can significantly decline by loosening ballast or exposure of sleeper during construction and maintenance. Although there are many approaches to estimate the lateral ballast resistance, defining an accurate distribution of the resistance on each side of sleeper enables to design sleepers with higher lateral ballast resistance and determine maximum permissible exposure of sleeper and allowable temperature change. In this paper, we have analysed existing formulas, assessed friction coefficient on each of sleeper, compared the formulas with measured value from HSL track, and determined tolerance of those formulas. In particular, we have applied a formula that can infer the lateral resistance during design and maintenance stages to the Gyeongbu HSL track.