• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1995.10a
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• pp.110-112
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• 1995

현재 활발하게 사업구상이 진전되고 있는 경인운하의 계획은 해방후 부터 꾸준히 발상되어온 사업이지만 수리학적인 측면에서의 검토 및 예비신사는 상대적으로 철저하지 못한 수준에 있다. 조석간만의 차가 큰 김포매립지측과 한강의 신곡 수중보 상류측에 각기 갑문을 설치하여 운하를 형성하는 데 있어서는 양단의 수위변화, 즉 인천측의 조위변화와 한강감조구간에서의 동적수위변화 자료에 대한 정확한 이해가 필요한데 기존 타당성 검토 및 기본사업 보고서(경인운하 타당성 조사(해양조사) 보고서(1991.4, (주) 한국해양과학기술))； 경인운하 타당성 조사 및 굴포천 종합치수사업 기본계획 보고서(1991.12, 건설부, 한국수자원공사)； 경인운하 건설 및 부대사업 타당성 검토 및 기본계획 보고서(19994.12, (주) 대우건설)는 이를 정확하게 해석하고 있지 못하다. (중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1996.10a
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• pp.102-108
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• 1996

연안매립 및 신항만 건설, 해안선 정비사업 등과 같은 대규모 공사는 인근 해역에서의 해수유동의 변화와 해수의 혼탁도 증가 및 퇴적물의 침식과 퇴적에 의한 해저 지형의 변형을 초래하고, 이로 인해 기존 항로의 매몰과 해양생물 생태계 변화 등과 같은 문제점을 유발한다는 것은 잘 알려진 사실이다. 특히 한국의 서해연안 대부분과 남해연안 일부에 분포되어 있는 미세-점착성 퇴적물은 사질성 퇴적물과는 달리 퇴적물에서 부유된 토사 입자의 침강 속도가 아주 작아서, 파랑과 조류 등과 같은 해수유동에서 의해 쉽게 이동되어 현저한 해저 지형의 변형을 초래한다. (중략)

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.303-304
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• 2008

1970년부터 해운대 신시가지 조성 및 춘천의 복개공사, 해안 주변의 매립, 도로건설 등의 연안 관련 사업이 환경에 미치는 종합적인 영향에 대한 검토도 없이 시행되어, 해운대 백사장으로 유입되어야 할 토사가 주공급원인 육지로부터 잠정적으로 차단되었다. 해운대 해수욕장의 해빈이 갈수록 감소되고 있는 가운데, 유실된 토사가 퇴적되는 연안의 해저지형에 대한 조사를 통해 정량적인 분석과 기간별 침퇴적 경향을 알아보는 연구가 필요하다. 따라서 본 연구에서는 수심 측량 자료를 이용하여 GIS기법으로 해저지형도를 제작하였고, 해저지형을 등간격으로 나누어 각 구간별 침퇴적 경향을 분석해 보았다. 그 결과 계절별로 침퇴적을 반복하고 있었고, 여름에는 침식, 겨울은 퇴적되는 경향을 보였다.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.457-458
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• 2010

PHDC(Promoted High Durability Concrete) is developed for preventing the chlroide attack to concrete structure on the reclaimed ground. In this study, the basic characteristics and the field application of PHDC is examined through experiments, the durability standard of the company is suggested. the long-term monitoring experiment for measuring the chloride penetration is also performed.

• Proceedings of the KSR Conference
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• 2001.05a
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• pp.416-423
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• 2001

The object of this study is to determine the application of friction and ground stress type CGP(Compaction Grouting Pack)-anchor in retaining wall construction on the soft ground by executing in the fill deposit with abandoned coal. In this study the effect of CGP-anchors as retaining wall anchor on the soft ground anchor was evaluated through measuring displacement according to tensile strength by acting tensile strength after equipping CGP-anchors. From the field tests results, CGP-anchor was determined to be considerably effective as retaining wall anchor on the soft ground by showing that the maximum displacement was 60mm and the elastic displacement was within 50mm by 53ton tensile strength.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.2151-2155
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• 2008

In case of constructing final closure in sea having big tide variation, the velocity in gap and the seepage velocity under the revet are faster because of inner and outer water level difference of the revet. Thus, the rubbles for final closure lose and the original ground is scoured by piping. There are several difficulties from the view of construction efficiency and safety. This study finds hydraulic phenomena in final closing construction area, develops a program for final closing simulation, minimizes the error during design and construction, and supports the engineering capacity for efficient and safe construction. The existing design method for final closure only considers the flow in gap, but the developed program considers the seepage in revet and flow in closure gap. This developed program chooses the suitable rock size for final closing design and establishes the proper method for final closing construction.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.3 no.3
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• pp.103-111
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• 1998

This paper reports the sediment geochemistry and its relation to the grain size distribution in Kyeonggi Bay, Korea. Sediment samples were collected from 90 stations during the cruise crossing the bay in December 1995. Variables investigated were the sediment grain size, organic carbon content, and concentrations of AI, Fe, Mn, V, Co, Ni, Cr, Zn and Cu in the sediment. We followed the change in these variables by comparing the data obtained from this region in 1981. Distribution pattern of sediment grain size was modified from that in 1981 in some places. Near the Shihwa Dike which was completed in 1994, sediment had got finer grained. Sediment facies changed from fine to mixed facies near Youngjong Island where the tidal flat has been reclaimed for airport construction. Contents of organic matter and metals in the sediment were mostly dependent upon the sediment grain size, but an exception was found in the harbor area. The sediment in the Incheon North Harbor showed higher accumulation of organic matter and metals such as Ni, Cr, Zn and Cu.

• Journal of Environmental Health Sciences
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• v.35 no.4
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• pp.304-314
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• 2009

A new harbor as been constructing in Gadukdo. However, a lot of fugitive dust gas been often generated from construction site reclaiming sea sand, especially when the Northwester is blown strongly. It has resulted insome appeals of residents in Gadukdo. In this study, we estimated the amount of fugitive dust caused by new harbor construction using Fugitive dust formula. Also, the concentration of PM10 for recipient is predicted by AERMOD. The amount of fugitive dust is 26.56 ${\mu}g/sec{\cdot}m^2$ and 11.84 ${\mu}g/sec{\cdot}m^2$ respectively by the Fugitive dust formula. PM10 outlet concentration and the amount of fugitive dust increase according to wind velocity and directions. AERMOD is performed on the basis of weather data and the amount of fugitive dust generated with wind velocity. As a result of AERMOD, the PM10 concentration of Sunchang and Oinul are predicted over 100 ${\mu}g/m^3$. The PM10 concentration of Sunchang and Oinul are predicted over 130 ${\mu}g/m^3$ when wind velocity of northwester in winter is over 11 m/s (Air Quality for Particulate Matter (100 ${\mu}g/m^3$ for 24 hours)). Also, the measured error between AERMOD and actual measurement is lower than 5%.

• Geotechnical Engineering
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• v.14 no.1
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• pp.81-92
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• 1998

Coal ash from thermal power plants has been produced in large quantity and discarded uselessly, However, it is possible to supply construction material properly by utilizing the coal ash as construction material. In this study, the applicable model and its applicability for deformation analysis of coal ash fill and reclamation ground are studied. Camflay model gives complete constitutive law which illustrates deformation and pore water pressure while soil is loaded under the various stresses at drained and undrained conditions. The merit of proposed model which is acquired from laboratory tests is that only a few soil parameters are available. The whole parameters of Camflay model are obtained by typical mechanical test and CV triaxial test on the sample with optimum mixing ratio( i.e. fly ash : bottom ash=5:5) Then the results from proposed numerical analysis are compared with laboratory results. The differences between laboratory test and numerical analysis are negligible. Parameters deter mined from laboratory tests are useful as a basic data for deformation analysis of coal ash reclamation ground using Camflay model.

• The Journal of Engineering Geology
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• v.12 no.4
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• pp.379-394
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• 2002

This study was initiated to identify groundwater quality and contamination at present in the 'A' section of Seoul Metropolitan Subway. Groundwater samples were collected at 21 boreholes along the 'A' section and appeared to show mainly $Ca-HCO_3$ type. In 20 samples, concentration of $SO_4$, Cd, Pb, Fe, Mn, Al, F and $NO_3-N$ were higher than those of Korean drinking water quality standards. From chemical data and saturation Indices, contaminant sources of individual chemical elements were inferred to be buried wastes and surface sediments over the study area. The result of factor analysis suggested that the pollution factor should account for about 47% of data variation.