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열차 하중 작용 시 블록식 보강토 옹벽으로 지지된 철도 노반의 거동

Behavior Characteristics of Railway Roadbed Retained by Geosynthetic Reinforced Segmental Wall Under Train Load

  • Lee, Seong Hyeok (High speed Railway Research Division, Korea Railroad Research Institute) ;
  • Choi, Chan Yong (High speed Railway Research Division, Korea Railroad Research Institute) ;
  • Lee, Jin Wook (High speed Railway Research Division, Korea Railroad Research Institute)
  • 투고 : 2012.04.24
  • 심사 : 2012.10.05
  • 발행 : 2012.10.30

초록

지오그리드에 의해 부분 보강 및 전면 보강된 2가지 타입의 블록식 보강토 옹벽으로 지지된 철도노반의 열차하중 전달 메카니즘을 조사하기 위해 정 동적 열차하중 재하실험을 수행하였다. 실험 노반은 높이 2.6m, 폭 5m, 뒷 길이 6m로 구축하였으며, 소정의 위치에 토압계, 변위계 및 변형율계를 설치하였다. 실험결과, 2가지 타입의 블록식 보강토 옹벽으로 지지된 철도노반에서의 벽체 변위 양상 및 보강 정도에 따른 연직 토압의 차이를 확인하였다. 또한 동적 열차하중 재하시 벽체 상부에서 변형율이 감소하는 현상을 볼 수 있었으며, 열차하중 재하에 의한 잔류 변형율 및 변형율 증분은 현행 설계기준에 비해 매우 작은 값을 보이고 있었다.

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