A Comparison of Behavior of the Roadbeds of Ballasted & Concrete Track with the Cyclic Loading

자갈궤도와 콘크리트궤도에서의 하중재하에 따른 노반거동 비교

  • 최찬용 (한국철도기술연구원 철도구조연구실) ;
  • 이성혁 (한국철도기술연구원 철도구조연구실) ;
  • 엄기영 (한국철도기술연구원 철도구조연구실)
  • Received : 2010.07.08
  • Accepted : 2010.08.11
  • Published : 2010.09.30

Abstract

The track systems installed in Korea railway consist of two types on ballasted track or ballastless track. In this study, it was compared with difference of the behaviors at roadbed with cyclic loading through full scale model test. From the results of model tests, loading distribution ratio of the concrete slab track become more widely distributed than ballasted track, and loading distribution ratio at concrete track was about 30:20:15. The concrete slab track is likely to behavior of the rigid plate, while ballasted track is such as flexible pavement. The vertical stresses of upper roadbed with traffic cyclic loading in concrete track were measured about 30 kPa or less. It was a scene very similar to the results of the field train running test. The vertical stress at concrete track was occurred approximately 4 times smaller than ballasted track. Also, the soil velocities with cyclic loading at the slab track were occurred about 0.3 cm/sec or less, its 8 times smaller than ballasted track.

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