Dynamic Analysis of Structure's Approaches through Field Tests in the Conventional Railway

현장계측을 통한 기존선 철도 구조물 접속부의 거동분석

  • 박준오 (한국철도시설산업㈜, 선로시설연구소 연구개발팀) ;
  • 이상배 (한국철도공사, 철도연구개발센터 기술연구팀) ;
  • 홍원표 (한국철도시설산업㈜, 선로시설연구소)
  • Published : 2007.05.17

Abstract

Korean trains pass many mountain areas, so the volume of structures like bridge and tunnel has large part of railway lines. Train speed-up naturally needs a straight line in railway, then structures are increasing, and the length of structure has more than 70% in Kyongbu high-speed railway. The stiffness of bridge and tunnel is higher than the soil in the roadbed in spite of dynamic difference in vibration and displacement. Differences in stiffness have more dynamic effects and increase the deformation and destruction in the track and roadbed. This influences passenger's comfort and the safety of operation, and it needs more track maintenance. This study selected tunnel with ballast track, tunnel with concrete track, and structure's approaches with short maintenance cycle in the roadbed and had track acceleration tests and track liner inspections using track master in the field. This study will measure periodically to structure's approaches which have very fast track irregularity and analyze dynamic differences and track irregularity near structure's approaches, so realize the cause of track irregularity of structure's approaches and use basic data for reasonably strengthening method of structure's approaches.

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