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2016 Vol.49, Issue 12
Experimental study on the discharge coefficient of slope-type and step-type weirs

경사형 및 계단형 보의 유량계수 산정을 위한 실험연구

Joon Gu Kanga
,
Jong Tae Kima*
강 준구a
,
김 종태a*
aRiver Experiment Center, Korea Institute of Civil Engineering and Building Technology
a한국건설기술연구원 하천실험센터
*교신저자. *Corresponding Author. 
31 December 2016. pp. 961-969
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Abstract

Due to the recent requirement of installing low-head structures considering environmental aspects, various types of fixed weir have been suggested. However, the design guideline of transverse structures for practical application is very limited. The purpose of the present study is to analyze the hydraulic properties of the fixed weirs installed at the small and middle sized rivers of Korea depending on the physical specifications to provide fundamental data that may be reflected to the design of a low-head fixed weir considering the relevant environmental aspects. The basic discharge coefficient of slope-type and step-type weirs depending on change of crest was estimated, and a stage-discharge curve was developed. In addition, the flow properties under free flow and submerged flow conditions were analyzed by varying the hydraulic conditions such as discharge and crest.

Keywords
Weir
Free Flow
Discharge Coefficient
Free Flow
Submerged Flow

최근 들어 보의 환경적인 측면을 고려한 저낙차형 구조물 설치가 요구되면서 고정보의 형태도 다양하게 제안되고 있다. 그러나 실무에 적용하기 위한 횡단구조물의 설계 가이드라인은 매우 한정적이다. 따라서 본 연구는 국내 중소하천에 설치된 고정보의 물리적 제원 변경에 의한 수리적 특성을 분석함으로써 환경적인 측면을 고려한 저낙차형 고정보의 유량계수 산정을 위한 기초자료를 제공하는데 목적이 있다. 이를 위해 경사형 및 계단형 보에 대해 crest 변화에 따른 기본적인 유량계수를 도출하였으며 수위-유량 관계 곡선을 개발하였다. 또한 유량과 crest 등과 같은 수리학적 조건을 변화시켜 자유 흐름 조건 및 잠긴 흐름 조건의 흐름특성을 분석하였다.

키워드
보
수리모형실험
유량계수
자유흐름
잠긴흐름
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 49
  • No :12
  • Pages :961-969
  • Received Date : 2016-08-30
  • Revised Date : 2016-10-25
  • Accepted Date : 2016-11-02
  • DOI :https://doi.org/10.3741/JKWRA.2016.49.12.961
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