- Volume 7 Issue 3
According to continuos welded rails on a bridge, temperature changes bring about the expansion of the bridge deck adding axil forces on the track. Moreover, the ballast on the bridge deck expansion joint is moved due to the bridge deck. If bridge decks are longer, the influence is greater, loosening ballast, causing track irregularities, and deteriorating passengers' comfort. Considering structure of bridge itself and tolerance of track irregularities caused by the loosened ballast on bridges, the maximum length of a deck should be less than 80m, which is the same as the standard of the French railway. In this study, an interaction between the expansion related to the bridge length and irregularity in longitudinal level referring to measurements and maintenance works performed in the high-speed railways was analyzed. This research shows that installation of sliding plate or vertical ballast stopper is not a good option since it is difficult to install. On the other hand, installation of movable fastener or gluing is easy but its influence is insignificant. To conclude, switch tie tamping or manual tamping is more effective than others.
- The 7th SITAC meeting minutes, 한국고속철도건설공단, 2000
- 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
- 궤도검측자료, 철도청, 2000-2004