Numerical Evaluation of Roadbed Performance subject to the Operation of Korean High-speed Train

초록

In Korea, the speed-up of conventional lines is one of the main issues since high-speed train has been developed. It is a fact that the straightening of track alignment is one of the undoubted ways to improve the train speed on conventional lines, while that requires huge investment resources. Therefore, the operation of a high-speed train as well as the minimum improvement of track has been suggested as an effective and economical alternative way for the speed-up of conventional lines. In this study, the roadbed performance (roadbed pressure and settlement) induced by the high-speed train was numerically evaluated in order to make sure its operation safety on the conventional line. As a result of this study, the high-speed train which will be operated in combination with existing trains is expected to give no adverse impact on the conventional line even with its improved running speed.