Field Investigation of Bridge Scours in Small and Medium Streams(2)

우리나라 중.소 하천의 세굴특성 조사연구(2)

  • 여운광 (명지대학교 공과대학 토목·환경공학과) ;
  • 강준구 (명지대학교 공과대학 토목·환경공학과)
  • Published : 1999.02.01

Abstract

In order to understand the present situation of bridge scouring and to provide the fundamental information for bridge design, in-situ measured data is analyzed for bridge scours at small and medium streams in the heartland of Korea. The physical parameters affecting the bridge scouring such as flow depth, velocity, pier length and width, scouring depth, and the angle between flow and pier are extensively surveyed and measured. According to the locality and the pier type data are classified to analyze. With these data, some important factors for the scour depth such as flow depth, angle and Froude number are investigated and applied to existing formulas proposed by many researchers. In addition, the computational results are compared with the measured and some of the applicable formulas in this region are recommended.

우리 나라의 세굴현황을 파악하고 교량설계에 대한 기초자료를 제공하기 위하여 중부지방의 중·소하천에 위치한 교량에 대하여 실시한 세굴조사 자료를 분석하였다. 현장실측은 주로 세굴에 영향을 미치는 물리량들, 즉 수심, 유속, 교각폭, 및 길이, 세굴깊이, 접근각 등을 중심으로 이루어졌다. 지역적으로는 경기도 용인·광주지역, 홍천강의 서면지역, 청평·포천지역, 연천지역, 청주북일지역으로 구분하였으며 교각도 타원과 원형으로 구분하였다. 이들로부터 세굴깊이와 수심, 접근각 도는 Fuoude수 등주요 인자들과의 관계를 도출하였으며 또한 기존의 제안된 세굴공식에 이들을 적용시켜 세굴깊이를 산정하였다. 또한 실측된 세굴깊이와 비교하여 우리 나라에 적용가능한 세굴공식을 제안하였다.

Keywords

References

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