• Proceedings of the Korea Concrete Institute Conference
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• 1999.04a
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• pp.821-824
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• 1999

콘크리트 케이슨 제작장(Casting Bed)내에 케이슨의 제작 및 이동경로가 되는 이동통로(Trough)를 형성하고 거푸집과 이동통로를 겸할 수 있도록 고안한 소핏폼(Soffit Form)을 설치함으로써, 제작된 케이슨 하부로 케이슨 부양용 에어로 고(Aero Go)가 양방향으로 자유로이 이동할수 있게 하여 제작에서 운반까지의 각 단계별 공정이 일직선상에서 공장식 연속 조립공정으로 진행되며, 또한 별도의 대차 및 회수시설이 불필요한 공장형 일관 제작 시스템에 의한 다단계 케이슨 제작, 운반 및 진수방법이다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.52-54
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• 2018

울산신항 북방파제(제3공구)축조공사에서는 국내 최초로 선박제조용 F/D(Floating Dock)선을 적용하여 케이슨 제작 및 거치공사를 실시하였으며, 공장형 슬립폼 제작장(IP-CCV)를 적용한 경우 보다 공기단축 및 원가절감의 효과가 있었다. F/D선 공법 순서는 작업부두에 F/D선 접안, 케이슨 제작, F/D선 진수장 이동, F/D선 및 케이슨 진수, 케이슨 예인 및 거치의 순서로 시행되었으며, 현재 턴키공사의 설계특화 내용으로 활용되어 시공안정성 향상 및 공기, 공사비 절감 방안으로 적용되고 있다. 향후 남북관계가 원만히 해결되어 동해안 항만개발이 가속화되면 국외특허공법(IP-CCV)에 의존없이 경쟁력있는 공법이라 판단된다.

• 한국방재학회:학술대회논문집
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• 2010.02a
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• pp.79.1-79.1
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• 2010

본 연구에서는 케이슨식 방파제 구조물에 대하여 기초마운드의 잠재적인 손상 모니터링에 관한 연구를 수행하였다. 이를 위해 첫째, 케이슨식 방파제 기초마운드의 이상 상태 여부를 판단하기 위하여 진동응답 분석기법을 선정하였다. 둘째, 선정된 기법에 의한 손상 예측 가능성의 검증을 위하여 케이슨식 방파제의 구조모형을 제작하였다. 셋째, 모형케이슨에 대한 유한요소 모델 생생하여 기초마운드의 손상에 따른 진동응답을 분석하였다. 마지막으로, 모형케이슨에 대한 진동실험을 통하여 기초마운드의 손상 예측을 수행하였다.

• 어항어장
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• s.47
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• pp.26-29
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• 1999

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.32 no.6
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• pp.396-410
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• 2020

The design and the construction are carried out by installation of new caissons on the back or the front of existing caissons to increase the stability of existing caisson breakwater. In this study, we use the eigenfunction expansion method to analyze the effects of wave structure interaction when new porous dual circular caissons are installed on the back or the front of existing breakwater. The porous dual circular caisson which consisting of a porous outer cylinder circumscribing an impermeable inner cylinder is one type of seawater exchanging breakwater. The comparison of numerical results between present method and Sankarbabu et al. is made, and the wave force and the wave run-up acting on each porous dual circular caisson are calculated for various parameters by considering the wave structure interaction.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.39 no.1
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• pp.195-201
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• 2019

Long caisson breakwaters can improve the structural safety of a caisson due to the wave dispersion effect which reduces the average wave force acting on one caisson. However, in order to make long caissons, there are many manufacturing and construction limitations. Recently, interlocking caisson systems, which are to form a long caisson by interlocking individual caissons with adjacent caissons, have been much attention. In the present study, a interlocking caisson system with shear-keys was proposed and the wave dispersion effect according to the shear-key was evaluated analytically. As a result, (1) Because of the asymmetric shape of the interlocking caisson, the structure behavior and the wave dispersion effect of one are also asymmetric. (2) The wave dispersion effect is more influenced by the distribution and characteristics of wave acting on each caisson rather than the shape of the shear-key such as shear angle, height, shear length ratio. (3) The interlocking caisson breakwater is almost the same behavior and wave dispersion effect as a fully integrated breakwater.

• Construction Engineering and Management
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• v.8 no.4
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• pp.20-26
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• 2007

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.11a
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• pp.45-50
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• 2004

The method of caisson typed bridge-foundation fabrication and installation applied in Ul-san newport breakwater project is throughly carried out to compact QRR mound vibro-hammer step by step to minimize settlement through stability check. Floating Dock was mobilized for caisson fabrication due to limited site area. fabricated caisson on the Floating Dock was towed to the deeper area of 8m water depth to be launched, and Floating Crane assisted launching and installation work of the caisson. finally water filling was done followed by surveying work to permanent installation.

• Computational Structural Engineering
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• v.7 no.4
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• pp.119-126
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• 1994

One of the most serious promblems in the concrete structures is cracking failure due to the several complicated reasons. These cracks are not only serious structural problems, but also lower the durability and deteriorate the structural shape, which cause the reinforcement rust in the open air and sea water. An analytical study was undertaken to investigate the cracking problems in the one of concrete caissons using Finite Element Method. This caisson is modelled with plate elements and truss elements for the walls and lifting cables respectively and analyzed in the every construction stages, such as lifting, moving, sinking, filling, towing, setting, and proposed reasonable construction methods for the concrete caisson structures.

• Journal of the Korean Society of Hazard Mitigation
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• v.11 no.3
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• pp.105-110
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• 2011

Recently, a deep mixture method as a soil improvement method of marine soft ground, which causes less noise and vibration than other methods, are widely used. In this study, for DCM(Deep Cement Mixing) method, one of the deep mixture method, optimum mixing ratio of clay-cement was suggested using uniaxial compression tests on specimens with various mixing ratio of claycement. In addition, the stability of a caisson on tangent circle-type and wall-type DCM treated ground was evaluated using centrifuge tests. As a result, optimum mixing ratio of clay-cement was 28.5% and the stability of the caisson on DCM treated ground was confirmed. However, the lateral displacement of the caisson on the wall-type DCM treated ground was 7% less and the settlement of that was 39% less than the case of the tangent-circle-type DCM method.