- Volume 17 Issue 6 Serial No. 79
According to continuous welded rails on a bridge, temperature changes bring about the expansion of the bridge deck,adding axial forces on the track. Moreover, the ballast on the bridge deck expansion joint is moved due to the bridge deck. The longer the bridge deck is, the greater the influence will be, loosening the ballast, causing track irregularities, and deteriorating passenger comfort. Considering the structure of the bridge itself and tolerance for track irregularities caused by the loosened ballast on the bridge, the maximum length of the deck should be less than 80 m, which is the same as the standard of French railways. In this study, the interaction between the expansion related to the bridge length and the irregularity in the longitudinal level, referring to measurements and maintenance work performed in high-speed railways, was analyzed. This research shows that the installation of a sliding plate or a vertical ballast stopper is not a good option, since it is difficult. On the other hand, the installation of a ZLR fastener or gluing is easy, but its influence is insignificant. In conclusion, switch tie tamping or manual tamping is more effective than other methods of what?
- 궤도검측자료, 철도청, 2000-2004
- High-speed Railway Bridge Design Manual, Systra, 1994
- Technical Analysis of Track Issues on Korea High Speed Line, 2002, Systra
- Setting Behavior of Ballast-Stabilized with Agribond under Traffic Conditions 2004, CST
- The 7th SITAC Meeting Minutes, 한국고속철도건설공 단, 2000