Mechanized construction process of quick-hardening concrete track to renewal existing ballasted track

초록

A ballast track is a structure where deformation gradually progresses as a result of accumulated train operation, which necessitates continuous maintenance to secure the performance. To reduce maintenance costs and increase effective performance, in this study, a quick-hardening track system has been developed, which can convert the existing ballast track into a concrete track without interrupting the train operation. In order to verify the performance of quick-hardened concrete track, it was installed in Uiyeong Tunnel and carried out field measurement to analyze track behavior using acceleration, displacement, and strain, etc. In this paper, 4 types of trains (Mugunghwa, KTX, Electric Commuter train, Freight train) among 10 types of trains passing through Uiyeong Tunnel were compared and analyzed. As a result of the track behavior analysis on train operation, there is no significant difference between the measured values at the construction joints and the track connection with ballasted and concrete. Also, the measured values of all types of trains were within the criteria. It was confirmed that the railway linearity from the installed quick-hardened concrete track was well established.