지하철 혼잡도를 고려한 콘크리트궤도의 탄성패드 스프링강성 평가 = Evaluation of Spring Stiffness of Resilience Pads for Concrete Track System Considering Subway Congestion

다국어 초록 (Multilingual Abstract)

In this study, three locations with different congestion levels for each section were selected as field measurement sections for evaluating the spring stiffness of resilience pads for direct-fixation concrete tracks considering subway congestion, and the performance evaluation technology of resilience pads that can measure the spring stiffness of rail supporting points at target locations was applied to evaluate the spring stiffness of the resilience pads considering subway congestion for each section. The main parameter was set as the congestion levels of cumulative passing tonnage for each section, and the changes in the spring stiffness of the resilience pads of the direct-fixation concrete track according to the congestion levels were compared and analyzed. As a result of the analysis, the spring stiffness of the resilience pads in section B to C, where the cumulative number of passengers is relatively high compared to section A, where the cumulative number of passengers is the lowest, increased by approximately 7% and 11%, respectively. Considering that the target track of this study has been in service for approximately 5 years and the cumulative passing tonnage is only approximately 9 million tons, it is judged that the cumulative number of passengers reflecting congestion levels for each section and the changes in the spring stiffness of the resilience pads are highly correlated. In addition, as a result of the correlation analysis between the cumulative passing tonnage and the spring stiffness of the resilience pads, it is estimated that the resilience pads in Section C will require replacement in approximately 20 years, in Section B in about 23 years, and in Section A in about 27 years.