In 2004, 300km/h speed of high-speed rail was introduced in Korea. In recent years, policies and
technologies are being developed with the goal of increased speed higher than 400km/h. HEMU-430X vehicles have been developed during the test, and technology-related infrastructure is under development. In addition, studies are underway for improving the speed of 500km/h or more. In more than 400km/h, track irregularity due to bearing force of track is increasing rapidly. In this study, applicability for the track structure with steel sleeper, to investigate alternatives that can reduce bearing force of track and maintenance costs.

• 윤희택(한국철도기술연구원 고속철도연구본부 책임연구원, 공학박사, 구조기술사) | Yoon, Hee Taek Corresponding Author
• 박영곤(한국철도기술연구원 고속철도연구본부 책임연구원, 공학박사) | Park, Young Kon
• 장세기(한국철도기술연구원 광역도시교통연구본부 책임연구원, 공학박사) | Jang, Seky