• 한국농공학회지
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• 제45권1호
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• pp.91-101
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• 2003

Boryeong Seadike located at southwestern seashore of Korean peninsula completed in 1997. Sluice gate operation can be an important factor to maintain lake water quality and reduce retaining time of pollutants within lake. The lake water quality simulation model, WASPS was adopted and tested to find out proper gate operation timing and discharge amount. From the simulation of sluice gate operation, the results showed that the later the time of discharge for loosing 1 day successively to 6 days, the better the quality of water. Discharge amount showed relatively minor changes of water quality. This means that pollutants flowed into lake from watershed do not have enough time to mix up with deep water when the gate opened at early time. About 3 days delay of discharge caused the dilution effect to stabilize the lake water quality in case of Boryeong freshwater lake.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.306-312
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• 2005

Gates for the purpose of drainage are classified following the types of structure as: Radial Gate, Sluice Gate, Rolling Gate, Drum Gate. In many cases of the reclamation project the sluice type of gates are applied. Different from this general trend, however the radial type of gate was adopted in the Saemangeum project. In this case the discharge coefficients which are used for the sluice type of gate was applied. To estimate the correct amount of discharge which will be evacuated through the gates, therefore the proper discharge coefficients should be estimated before the operation of the gates. The discharge coefficients were estimated through the physical hydraulic modeling, and we got the results as: $0.72{\sim}0.84$ for the submerged condition on the both sides of upstream and downstream, $0.62{\sim}0.83$ for the free surface condition on the downtream side only, and $1.04{\sim}1.12$ for the free surface condition on the both sides of upstream and downstream. The discharge coefficients obtained from the experiments are greater than those of the sluice gates in the design criteria. From the results of the study we may expect that in the Saemangeum project the radial gates could evacuate larger amount of discharge than the originally designed discharge, so that we may sure that the Saemangeum gates have enough capability to control the evacuation of water not only in the usual period but also in the flooding season.

• 한국산학기술학회논문지
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• 제12권11호
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• pp.4738-4744
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• 2011

본 연구는 상부에 설치되는 콘크리트 구조물 없이 설치되어 작동하는 새로운 소형 수문 시스템을 제안하였다. 주요 메커니즘은 유압시스템, 수문 상하 이송 메커니즘, 수문 잠금 제어장치, 이물질이 감지되면 수문이 파손되지 않도록 하는 안전장치 등으로 구성하였다. 유압 펌프 및 제어 시스템은 수문 시스템의 위치에서 떨어진 장소에 설치하여 상부 구조물을 제거할 수 있도록 하여 제어 하였다. 수문 인양 장치는 유압 액추에이터가 달린 래크와 피니언이 측면에 설치되어 작동되며 그 결과 제품의 원가 절감, 작동시 안전성 확보 및 제품의 컴팩트화를 구현하였다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1225-1230
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• 2007

The turnover-type sluice gate is typically actuated by the hydrauic system. The hydraulic system may be a open circuit type or a closed circuit type. The open circuit type hydraulic system is composed of a uni-directional pump, a directional control valve, pilot operated check valves, flow control valves, single-rod cylinders. The closed circuit type hydraulic system is composed of a bi-directional pump, pilot operated check valves, check valves, a counter balance valve, single-rod cylinders. The energy efficiencies of two hydraulic systems for the turnover-type sluice gate are compared here.

• 한국생산제조학회지
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• 제26권3호
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• pp.299-305
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• 2017

Gate-lifting devices in small- to mid-sized sluice gates mostly employ the mechanical roller rack pinion (RRP) system. This RRP system, which consists of a rack-bar and a pinion, transforms a rotation motion into a linear one. The rack-bar has a series of roller trains that mesh with the pinion. In this study, we adopt an exact involute-trochoid tooth profile of the pinion to obtain a higher contact fatigue strength using the profile modification coefficient. Further, we determine the contact forces and investigate Hertz contact stresses to predict the pitting life of the pinion according to varying the shape design parameters. The results indicate that the design fatigue life of an RRP system for sluice gate can be achieved only when the design value of the profile modification coefficient reaches or exceeds a certain level.

• 한국농공학회논문집
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• 제47권6호
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• pp.15-24
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• 2005

The normalization on the characteristics of water level change at the upstream gauging station was attempted according to the operation of drainage sluice gate of the Geumgang estuary dam. The characteristics were normalized by the analysis of water level change and by the linear-regression of the water level data measured at the inner station of Geumgang estuary dam and upstream gauging station. The results of normalization may be referred to the management of Geumgang estuary lake, the operation of pumping and drainage stations in the shore of the lake. The mean response time of water level change on Ibpo, Ganggyeong and Gyuam water level station were 39,81 and 160 minutes, when sluice gate was opened respectively. The mean velocity of surface wave, the mean displacement of water level change, the mean time of water level change and the mean rate of water level change varied largely depending on the location of gauging station and the characteristics of stream section of the water level gauging station.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2005년도 창립60주년 기념 추계 학술대회
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• pp.221.1-221.1
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• 2005

• 한국관개배수논문집
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• 제18권1호
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• pp.44-57
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• 2011

The status of fishway installed in domestic dikes showed a cascade types and sluice gate types 36% (four sites) and 64% (seven sites), respectively. Fishway of cascade type was constructed four sites (Iweon, Busa, Geum river, Haenam) and only Geum river was one of them has operated much more effectively since remodeling in a fishway and fishways of the others was not operated because of several problems like a desalination, a shortage of inflow water and variation of management elevation. Fishway of sluice gate type was installed seven sites and three sites (Yeongsan, Yeongam, Geumho) one of them were continuously operated until now. This results has a interesting interpretations. Prolonged discharge of inductive water from fishway can positively affect not only ascending of fishes but also fish fauna of around of the sea. The others of a sluice gate fishway were not operated because of seawater circulation through sluice gate until now. The closed reasons of fishway in domestic dikes may be summarized as follows: impassibility of sluice gate open by shortage of inflow water, problem of proper operating by long distance of between fishway and management office, absence of operating manual, seawater circulation, lack of fishway operating awareness. It was takes a long time for solution of hardware part but software part can be to find the answer through making a fishway operation manual and development of education program for manager. In this paper we deal with fishway in domestic dikes. Proper fishway control by manager was essential for ascending of migration fishes especially at fishway installed in dikes. Thus it was necessary to make manual for fishway operation and effort of continuously maintenance.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2021년도 학술발표회
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• pp.238-238
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• 2021

토목 구조물에서 수문 (Gate)은 다양한 시설에서 설계되어 적용되고 있다. 이런 수문은 용도나규모, 사용재료, 구동방식에 의해 다양하게 분류되는데, 본 글에서 다룰 Girder 타입의 Sluice Gate 는 가장 많은 분야에서 포괄적으로 적용되는 수문 형식중 하나이다. 일반적으로 2m×2m 미만의 소규모 수문에서는 수문설계에 수리계산이나 응력검토를 요하지 않으나, 높이 5m 가 넘는 대형 수문의 경우 비체의 무게가 수십톤에 달하기 때문에 정수역학이나 동수역학과 같은 수리학적 설계가 반드시 필요하다. 수문설계는 크게 세 가지 해석을 다루는데, 첫 번째는 정수역학 또는 동수역학적 거동에 대한 수문 비체의 구조해석이고 두 번째는 수문의 상승 및 하강을 위한 권양장치 및 수문비체, 구동장치 등의 계산이며 마지막으로는 수문의 형상과 수류형상에 따른 수문의 진동해석 이다. 본 글에서는 두 번째에 해당하는 수문의 상승 및 하강에 영향을 미치는 수리학적 요소들을 통해 가장 합리적인 수문형상설계에 대해 논하고자 한다. 특히 국내에서는 Girder 타입의 수문설계에서 수문하단부 sill 부근의 형상을 쐐기 형태로 일률적으로 적용하고 있는데, 이를 개선하여 유체역학적으로나 경제적으로 보다 유리한 설계안을 본 글을 통해 제안하고자 한다.

• 한국관개배수논문집
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• 제6권1호
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• pp.9-19
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• 1999

Energy dissipation of inflow in the upstream channel of sluice gate in Sihwa tidal barrier dam was estimated by hydraulic model study for the preliminary step to examine the erodibility of channel. The sluice gates is operated not only during the ebb tide