• 한국수자원학회논문집
• /
• 제55권10호
• /
• pp.835-841
• /
• 2022

댐 저수지 수위는 댐 운영에 있어서 핵심적인 수문자료라고 할 수 있다. 댐 저수위를 이용하여 저수량을 산정하기도 하고 가뭄 및 홍수 등 재해에 대비하기도 한다. 그러나 저수위는 댐 부근에서만 계측되어 넓은 면적을 가지는 저수지를 대표하기 어렵고 댐 부근은 방류 등의 영향으로 수면이 왜곡될 가능성이 높다. 또한 조사 결과 저수지 수면은 일정하지 않고 불규칙하며 구간별로 하강과 상승을 반복하는 것으로 나타났다. 이렇게 복잡하고 불규칙한 지수지의 대표 저수위 산정을 위해서 저수지 수위 관측밀도를 높여야 하며 본 연구에서는 화천댐에 대하여 최적의 수위 관측밀도를 도출하고자 하였다. 종방향으로 조사된 저수지 수면 표고를 통계분석하여 저수위 계측 적정 개소수를 도출하였다. 저수지 규모 별로 관측 밀도가 다르게 나타날 수 있어 괴산댐과 보성강댐에 대해서 같은 분석을 실시하였다. 그 결과 화천댐은 4개소, 괴산댐은 3개소, 보성강댐은 7개소의 관측밀도가 필요한 것으로 분석되었다.

• Water Engineering Research
• /
• 제2권2호
• /
• pp.103-112
• /
• 2001

Issues and problems in formulating South Korea's water resources policy are discussed in terms of water quantity and quality. South Korean needs both water conservation and water supply capability for the growing population and economic activities. The government has attempted to build more large-scale dams to store and supply water for residential, farming and industrial uses, but the environmentalists who emphasize conservation and environmental protection oppose the government. The environmentalists are popular among the general public. Water quality has been deteriorating from point- ad non-point sources. urban and farm runoffs are serious pollutants. All want by preserve water quality. There is no dispute on this matter between the government and the environmentalists. Money is hard to come by to preserve water quality. Economic and financial crises and no self-sufficient local governments' revenue structure are pessimistic. Basic survey on water resources, hydrology and hydraulic is badly needed for the future water resources planning.

• 지질공학
• /
• 제16권1호
• /
• pp.97-107
• /
• 2006

콘크리트 표면차수벽형 석괴댐(CFRD; Concrete Faced Rockfill Dam)는 기존의 중심코어 형 락필댐(ECRD; Earth Cored Rockfill Dam)과 대별되는 우수한 구조적, 재료적 특성으로 현재 가장 널리 활용되는 댐 형식이다. 본 고에서는 불리한 조건에서의 CFRD의 설계와 시공에 있어 최근에 부각된 최신 기술들을 정리하여 향후 활용에 도움을 줄 수 있도록 하였다. 예를 들어, 연약한 암을 이용한 댐체 축조, sand-gravel fill, 연결 슬래브 공법, 충적층 기초의 처리 공법등에 대한 간략한 기술적 동향을 고찰하여 관련 기술자들의 이해를 돕고자 하였다.

• 한국콘크리트학회:학술대회논문집
• /
• 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
• /
• pp.333-336
• /
• 1999

The crack of concrete induced by the heat of hydration is a serious problem, particularly in concrete structures such as mat-slab of nuclear reactor buildings, dams or large footings, foundations of high rise buildings, etc.. As a result of the temperature rise and restriction condition of foundation, the thermal stress which may induce the cracks can occur. Therefore the various techniques of the thermal stress control in massive concrete have been widely used. One of them is prediction of the thermal stress, besides low-heat cement which mitigates the temperature rise, pre-cooling which lowers the initial temperature of fresh concrete with ice flake, pipe cooling which cools the temperature of concrete with flowing water, design change which considers steel bar reinforcement, operation control and so on. The Aim of this paper is to verify the effect of low heat blended cement in reducing thermal stress in slab type's mass concrete such as container harbor structures.

• 한국측량학회:학술대회논문집
• /
• 한국측량학회 2006년도 춘계학술발표회 논문집
• /
• pp.47-52
• /
• 2006

In recent years, there is a strong urge to introduce GPS systems which can role in reference points and measure global positions to the field of structural measurements. In this study, a new structural measurement system using low-cost L1 single frequency GPS receivers instead of conventional expensive RTK L1&L2 dual frequency GPS receiver. This system consists of GPS OEM board, GPS antenna, wireless access points, and monitoring program based on Lambda method and makes it possible to apply to monitor a static behavior of large scaled Infra-structures, such as dams, tall buildings, road slops.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2006년도 추계 학술발표회
• /
• pp.430-433
• /
• 2006

Damage to earth structures for roads, railways and residential areas, as well as dams and river levees, during the 2004 Niigata-ken Chuetsu earthquake in Japan, and their rehabilitation works are overviewed. Several influential factors are pointed out, such as a) heavy rainfall preceding the earthquake, b) large aftershocks, c) geological conditions for subsoil including existence of liquefiable layers, d) compaction degrees for embankment, and e) drainage capacity from subsoil/embankments. It is also reported that, in the reconstruction works of damaged roads and railways, preferred use of geogrid-reinforced soil retaining walls was implemented.

• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
• /
• pp.205.2-205.2
• /
• 2011

Micro hydraulic turbines take a growing interest because of its small and simple structure as well as high possibility of applying to micro and small hydropower resources. The differential pressure exiting within the city water pipelines can be used efficiently to generate electricity like the energy generated through gravitational potential energy in dams. In order to reduce water pressure at the inlet of water cleaning centers, pressure reducing valves are used widely. Therefore, pressure energy is wasted. Instead of using the pressure reduction valve, a micro counter-rotating hydraulic turbine can be replaced to get energy caused by the large differential pressure found in the city water pipelines. In this study, in order to acquire design data of counter-rotating tubular type micro-turbine, output power, head, and efficiency characteristics due to the diffuser.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2001년도 학술발표회 발표논문집
• /
• pp.344-350
• /
• 2001

Piping is a phenomenon where seeping water progressively erodes or washes away soil particles, leaving large voids (Pipes led to the development of channels) in the soil. Piping failure caused by heave can be expected to occur on the downstream side of a hydraulic structure such as fill dams when the uplift forces of seepage exceed the downward forces due to the submerged weight of the soil. The way to prevent erosion and piping and to reduce damaging uplift pressures is to use a protective filter or to construct cutoff wall/imperious blanket. Therefore, all the hydraulic structures faced/with soil materials should be taken the safety against piping into consideration.

• 물과 미래
• /
• 제16권3호
• /
• pp.181-185
• /
• 1983

물의 압축성을 무시했을 때, 지진중댐에 작용하는 동적압력 문제를 취급하였다. 표면파까지를 나타내는 Green 함수를 도입하여 수평 및 수직 지진 가속도가 있을 때, 댐에 작용하는 동적압력을 나타내는 식을 구하였으며, 이를 이용하여 표면파의 영향을 정량적으로 예측할 수 있었다. 또 댐이 깊을 때에는 표면파의 영향은 거의 무시할 만 하였다.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2006년도 춘계 학술발표회 논문집
• /
• pp.818-823
• /
• 2006

In this study, the suitability of CFGD(concrete faced gravefill dam) was investigated by examining the strength and deformation characteristics of a gravelfill material, a CFGD main fill material, and comparing them with those of several rockfill dam materials. The gravelfill material exhibited similar strength and deformation properties to those of the main fill materials of existing stable large rockfill dams. Since not only CFGD has environmental and economic advantages over CFRD, but its main fill material compares favorably with those of the existing stable CFRDs, CFGD may be the best choice when natural gravel materials are abundant in the vicinity of the dam construction location.