• 한국농공학회논문집
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• 제48권1호
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• pp.81-88
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• 2006

Numerical analyses were carried out for studying on seepage problems due to seawater intrusion through the embedded rock layers of the sea-dike. A seepage analysis model, SAMTLE was developed fur two-layer embankment system. The analyses by SAMTLE showed that the size of embedded rock layer had a significant effect on the seepage problems of sea-dike. If the embedded rock layer is longer and thicker, the seepage problems become more serious to water head, seepage rate and safety factor of piping in embankment. On the other hand, if the width of embedded rock layer is equivalent to the sea-dike's bottom width, the water head becomes lower and seepage rate and safety factor of piping are dramatically increasing. This makes another seepage problems such that the fresh water becomes saltier and higher seepage rates result in internal erosion of sea-dike.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.153-158
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• 2008

In this study, piping and slope stabilities of sea dike were analyzed through pore pressure-mechanic coupled analysis. Through decrement of sea dike inclination, to confirmed cross-section reduction possibility of multi-function sea dike.

• 한국해안해양공학회지
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• 제13권1호
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• pp.35-45
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• 2001

현재 군장국가공단 조성지역은 방조제 체절작업이 완료된 상태로 방조제 외측은 물론 내측 수역도 조석운동을 하는 특이한 형태의 거동을 보이고 있다. 본 연구에서는 방조제의 파이핑에 대한 위험 가능성을 조사하기 위하여 유한요소법을 이용한 침투해석을 실시하였다. 방조제의 경우 외측 수역의 조석운동으로 인하여 비포화 침투를 고려한 비정상 흐름해석이 필요하다. 특히 대상해역에서는 내측 수역도 외측 수위의 영향을 받아 조석운동을 하기 때문에 이에 대한 고려가 필요하다. 따라서 경계조건을 구하기 위하여 방조제 내외측에 조위계를 설치한 후 그 결과를 이용하였다. 또한 성토재의 재료를 조사하기 위하여 입도분석을 실시하였다. 얻어진 결과를 이용하여 방조제 전후면의 조위변화를 고려한 해석을 실시하였으며, 계산결과를 한계속도와 비교하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.60-68
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• 2010

In this study, the seepage flow monitoring method by hydaulic head loss rate graph was developed for the purpose of monitoring the seepage flow from the see side or from the lake on sea dike in which seepage force was varied periodically. The hydraulic head loss rate was defined in this method. The value of the rate is in the range from 0 to 1. the value of 0 means perfectly free flow of seepage. the value of 1 means perfect waterproofing. The value of coefficient of determination in the hydraulic head loss rate graph closer to 1 means that the seepage flow way is stable. The value of coefficient of determination in the hydraulic head loss rate graph closer to 0 means that the hole may exist or the piping may be in the progress. The pore water pressure data measured in Saemangeum sea dike was analyzed with the developed method The result showed that the variation of seepage flow state was detected sensitively by this method and the interception effect of sea dike could be estimated quantitatively.

• 한국농공학회지
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• 제40권4호
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• pp.94-102
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• 1998

This paper aims at developing the prediction technique of the deformation for the embankment such as sea dike and shore protection relevant to reclamation project along the southern coast of the Korean Peninsula. Generally total deformation of a sea dike over clayey foundation are composed of immediate settlement, plastic deformation and consolidation settlement. Plastic deformation occurs when the ultimate bearing capacity is less than overburden pressure containing the stress increment due to the construction of an embankment. The reliable prediction of total settlement is very important since deformed final geometry of sea dike is directly connected for analysing the safety of the long-term slope failure and piping. During this study, plastic deformation, major part of deformation was analysed using the program developed by authors, whereas immediate settlement and consolidation settlement were predicted by Mochinaka and Sena's method and Terzaghi's 1-dimensional theory of consolidation respectively. In order to validate the prediction technique for the deformation, a case study of Koheung Bay reclamation works was carried out. A good agreement was obtained between observation and prediction, which means the applicability of the technique.