• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 한국해안해양공학회 2003년도 한국해안해양공학발표논문집
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• pp.185-193
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• 2003

준설, 매립 등의 해상공사가 해양환경에 영향을 미치는 주 요인은 공사중 발생하는 부유토사이다. 이러한 부유토사는 주변 해역으로 확산되어 여러 방식으로 해양생태계에 피해를 유발할 수 있으며, 발생 가능한 피해의 범위와 정도는 부유토사 발생율과 해저 죄적물 입도분포 및 주변 유속에 따라 결정된다. (중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 한국해안해양공학회 1998년도 정기학술강연회 발표논문 초록집 Annual Meeting of Korean Society of Coastal and Ocean Engineers
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• pp.17-19
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• 1998

우리나라의 연안역은 지금까지 선진국으로의 도약을 위한 경제개발 수행과정에서 임해공업단지 및 발전소 건설, 간척 ·매립사업의 추진 등 연안해역에서의 사회, 경제적 활동의 증가에 따른 해양오염과 생태계 파괴가 가중되고 있다. 이러한 문제를 해결하기 위해서 일반적으로 현장관측, 수리실험, 컴퓨터를 이용한 수치모델이 이용되고 있는데 경제적인 이유와 편리함 때문에 국내에서는 주로 수치모델에 의존하고있다. (중략)

• Journal of the Korean GEO-environmental Society
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• 제13권5호
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• pp.13-24
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• 2012

In this study, the in-situ model test has been conducted and used to estimate and analyze consolidation behavior of the ground by using the miniature test that reconstructs economically geotechnical behavior of in-situ full scale structure. To analogize the relation among effective stress, void ratio and coefficient of permeability at the self-weight consolidation stage, the low stress seepage consolidation test has been conducted and the involution function of constitutive equation had been obtained from the result of the curve fitted seepage consolidation test result. As a result of the numerical analysis that had been conducted on the representative section using a constitute equation, final settlement was similar with those of self-weight consolidation of the centrifugal model test. But, it was more or less smaller. It seems that these trends are caused by the difference between estimated values.

• Journal of Korean Society of Coastal and Ocean Engineers
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• 제22권5호
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• pp.333-343
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• 2010

In Mokpo coastal zone, the characteristics showing ebb-dominant tidal flow was confirmed by analysis of observed tide and tidal currents, Physical factors occurring ebb-dominant flow were reviewed. Influence of critical depth for drying, bottom shear stress, coastal reclamation, tidal amplitude, nonlinear tide, and eddy viscosity on the change of ebb-dominant flow was investigated by applying a two-dimensional circulation model. The simulation results for a variety of conditions showed that eddy viscosity and critical depth for drying does little or no impact on the generation of asymmetric flow. Strong bottom friction stress makes ebb-dominant flow clearly. Change of tidal flat into land swells ebb- dominant flow, and change of tidal flat into sea disappears ebb-dominant flow. Nonlinear tides play a decisive role in the generation of asymmetrical tidal flow. Non-linear tides should be included in the open boundary conditions of hydrodynamic modeling in the Mokpo coastal zone.

• Journal of the Korean Geosynthetics Society
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• 제14권4호
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• pp.59-77
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• 2015

In order to meet the new requirements for landfill materials, this study planned a study to apply mixed soil of mixing bottom ash and coastal dredged soil to the dredged ground. Coal ash generated from thermal power plant is divided into fly ash and bottom ash. In the case of fly ash, many studies have been conducted because small particles causes permeability coefficient to be small during recycling so no problem has been raised in the environmental area but the utilization of bottom ash has been limited because environmental problems have been raised during recycling due to its larger particle size and greater permeability coefficient. According to recently published studies, however, the results of the study that conducted the water analysis of leachate generated in the ground improvement section using bottom ash showed that heavy metal contamination levels were found to be within the reference value and no significant environmental problems were found so utilization of bottom ash is evaluated to increase significantly in the future. This bottom ash has the particle size of sand and only transportation costs need to be considered when providing materials because the majority has been disposed and it is judged as the most suitable material in dredging landfill in the economic aspect because most thermal power plants are located in the coast and transportation costs can be reduced by ship. Also, research on mixed soil that can maximize the effect of the construction period and construction cost savings than dredged soil is determined as needed because the demand for coastal dredging reclamation is increasing such as Saemangeum project etc. Therefore, we studied self-weight consolidation characteristics depending on sample processing and mixing method of mixed soil by carrying out interior self-weight consolidation experiments on mixed soil of mixing bottom ash and Kaolinite according to the new development needs of recent coastal reclaimed ground and these result findings are expected to be used as basic data when applying the large coastal dredged ground in the future.

• The Journal of the Korea Contents Association
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• 제9권8호
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• pp.384-391
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• 2009

The coastline area, which was the important to decide the shape of the national land, has the characteristics of changing its shapes and features. We have some trouble to make the appropriate use-plan, because of the huge land to be reclaimed from the sea and developing large and small coast areas. Of them the coastal sand dune plays a definite primary role in the side of tourism and ecology. But there is not enough study for that. Busan Songdo coast is decided as an object of this study. We would analyze transfer path of the coastal sand dune through the time series analysis with RTK-GPS survey for many years. In case of Song do coast, the mean coastline length is approximately 620m, the area is approximately $31,846m^2$. Breakwaters are set up in right and left sides in Song do coast. it can make the sand dune be a minimum. So the coastal sand dune is steadily deposited with a certain beach nourishment of every year. As a result of 7 times survey, both sides of the coastal sand dune are eroded. It turns out it is going ahead over all as the center of the coastal sand dune is deposited.

• Cement
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• 통권184호
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• pp.32-40
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• 2009

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 한국환경생태학회 2008년도 추계 학술대회
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• pp.33-35
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• 2008

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 한국환경생태학회 2009년 학술대회 논문집
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• pp.142-145
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• 2009

• Geotechnical Engineering
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• 제12권5호
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• pp.41-54
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• 1996

In this paper, the consolidation settlement of the landfill foundation during and after the period of disposal is analyzed using the program CONSOL which can include the influence of waste load and the leachate level into the analysis. the stability analysis of the embankment is also performed under the varied strength of foundation soil which results from the increase of effective stress due to consolidation of the clay under the landfill. The predicted settlement from CONSOL is compared with the field measured settlement. The results show that, when the leachate level increases with the increase of waste height, the increase of the effective stress of foundation clay is negligible and the stability of the slope of the landfill may not be secured as the disposal of the waste proceeds. Several complementary repairworks, e. g. the reduction of current slope of the fill, application of drain methods to stop or reduce !he leachate level are recommended. The predicted settlement consists moderately with the field measured settlement.