REDUCTION EFFECTS ON GROUND VIBRATIONS BEFORE AND AFTER INSTALLING THE CONTINUOUS WELDED RAIL

초록

The vibration caused by the railway transportation is different from the vibration caused by the road transportation and it has an inherent characteristics. But the characteristics and the reduction effects of vibration on railway line have not been investigated in detail. To decrease the ground vibrations, the KNR (Korea National Railroad), has been applying the CWR (Continuous Welded Rail) in Kyung-Bu line since 1973. Based on the experience of the KNR, it has been proved that the CWR has advantages of the maintenance costs, noise level, and ground vibrations. The CWR track has been installed on 2,020 [km] of the total extensions of 6,706 [km] conventional lines in Korea. Especially, the CWR reaches 95 [%] to the Kyung-in line. In this paper, we investigated the reduction effects on ground vibration by comparing acceleration levels before and after installing the CWR at various sites of Kyung-in line