플로팅궤도에서 침목패드 스프링정수 변화추이 분석 연구

초록

Lines 5 ？ 8 of the Seoul Metropolitan Rapid Transit have their track in the form of STEDEF on the floating track, and it is the sleeper pads that determine the track support stiffness. The decrepitude of the sleeper pads in long-term use results in the decrease in their thickness and increase in the spring constant. They are the causes of the increment in the track support stiffness, which influences the damage of the track structure. This study has identified the loss in the function of the sleeping pads caused by their decrepitude by means of measuring their thickness and the spring constant. It has proven that there exists a correlation between the spring constant and the thickness of the spring pads, and thus by measuring the thickness of the sleeper pads on the spot, evaluating their spring constant is possible.