The Journal of the Convergence on Culture Technology (문화기술의 융합)

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
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A Study on Estimation Method of Concrete Sleeper Strength for Sleeper Floating Track using Rebound Hardness Test Method

반발경도법을 이용한 침목플로팅 궤도의 콘크리트 침목 강도추정 기법 연구

  • 정지승 (동양대학교 건설공학과) ;
  • 이정숙 (서울교통공사 토목사업소) ;
  • 최정열 (동양대학교 건설공학과)
  • Received : 2022.04.21
  • Accepted : 2022.05.08
  • Published : 2022.05.31
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Abstract

The sleeper floating track (STEDEF) in this study was a track type in which a very soft resilience pad was installed under a relatively thin concrete sleeper (RC Block). Therefore it was expected that the resilience pad could affect the estimation results of the concrete strength. In this study, field applicability evaluation was performed to apply the rebound hardness test method, which was a general method for estimating the compressive strength of concrete in civil structures, to concrete sleepers of railway tracks. In order to analyze the strength estimation technique of concrete sleepers reflecting the characteristics of track structures different from those of civil structures, the parameter experiments that could affect the strength estimation results of concrete sleepers in a serviced line were performed. As a result of the study, the appropriate hitting position was suggested considering the shape of the concrete sleeper, and the difference in strength estimation results according to the condition of the concrete sleeper and supporting conditions was derived.

본 연구의 대상궤도구조인 침목플로팅궤도(STEDEF)는 상대적으로 얇은 콘크리트 침목(RC Block) 하부에 매우 소프트한 방진패드가 설치되어 있는 궤도형식으로서 방진패드가 콘크리트 강도 추정결과에 영향을 미칠 수 있을 것으로 예상되었다. 이에 본 연구에서는 일반적인 토목구조물의 콘크리트 압축강도 추정기법인 반발경도시험법을 철도 궤도의 콘크리트 침목에 적용하기 위한 현장 적용성 평가를 수행하였다. 본 연구에서는 일반적인 토목구조물과 다른 궤도구조의 특성이 반영된 콘크리트 침목의 강도추정기법을 분석하고자 공용중인 콘크리트 침목의 강도추정결과에 영향을 미칠 수 있는 매개변수 실험을 수행하였다. 연구결과, 콘크리트 침목의 단면형상을 고려한 적정 타격위치를 제시하였으며, 콘크리트 침목의 상태와 지지조건에 따른 강도추정결과의 차이를 도출하였다.

Keywords

References

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