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논문 기본 정보

자료유형
학술저널
저자정보
이경기 (도화엔지니어링) 임유성 (경북대학교 건설방재공학부) 최윤영 (경북대학교)
저널정보
한국수처리학회 한국수처리학회지 한국수처리학회지 제26권 제4호
발행연도
2018.1
수록면
81 - 97 (17page)

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초록· 키워드

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This hydraulic model experiment analyzed plunge pool of downstream and sulfur change of downstream depending on discharge flow in order to produce the optimal design plan of auxiliary spillway to be established. To that end, hydraulic characteristics of existing spillway were examined and hydraulic model experiment was conducted on design 1 and 2. First, the results of design 1 show that discharge ability is fine, approach velocity is within limits, but there is a need for improvement through a baffle wall shape change as a whirlpool occurs because of a baffle wall. In the case of sulfur of downstream water flow discharged from steep spillway is not sufficiently reduced and flows into downstream in super-critical flow condition. And as for PMF, near the spilling basin of the existing spillway and spilling basin of auxiliary spillway, unstable phenomena and whirlpool of water surface partially occur, but when considering that water level change is not significant at measuring points in the cross section of downstream as the main flow direction is concentrating into the center of downstream, the danger regarding downstream is limited as found in the analysis. Lastly, the analysis found that the factors risking original functions and safety of spillway structure occurring in the design 1 do not occur in the design 2, and show stable flow characteristics compared with the design 1. Therefore, detailed data regarding size and form of plunge pool and distribution characteristics of flow going into downstream are secured additionally through experiments, they will serve as very useful basic data for designing auxiliary spillway of similar dams.

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