• 플랜트 저널
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• 제6권1호
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• pp.64-70
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• 2010

From 2000, the world plant market, especially plant developing business related to oil and gas, has been increasing. Domestic construction companies advance to overseas plant construction market actively, and proportioning to this, an importance of utility construction is increasing. However, the project becomes large and high-tech, and many companies experience difficulty of project management due to relatively high risk of overseas construction. In this study, we built the standard process with which domestic company can evaluate the risk of overseas plant utility construction. Primary factors for risk evaluation is derived, classification system is made out, primary factor is analyzed, and counter plan is suggested. And thorough management of risk is performed by risk management organization that manages the risks, risk control methods, reports and monitors through risk sheet and risk action log from the start of project to the end.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.125-126
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• 2012

Domestic architect office from a period of high growth from the 1970s to the '80s has been established as some of the large corporations or publicly traded corporation. 1997 IMF has pointed out there is a lot of need for improvement activities in accordance with the construction recession since the 2008 global financial crisis. In order to address these causes, the company's continuous efficient operation for accurate efficiency and competitiveness analysis was required. Leverage financial ratio indicators Study Using Data Envelopment Analysis Data Envelopment Analysis (DEA) model, how to find a benchmark for the improvement of the efficiency of inefficient enterprises in various sectors being. In this study, a comparison of the conventional DEA model and the DEA-AR model is used to analyze the efficiency and domestic architect office is to improve the management efficiency.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.146-147
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• 2013

The oyster shells of about 240,000 tons have been annually produced in south coast of South Korea. However, about 25% of the oyster shells (60,000tons) was recycled as oyster seeding and fertilizer due to the limited amount of consumption for such purposes. The stored amount of oyster shell in the fertilizer manufacturing company is overfilled, and thus cannot accept any more of the waste oyster shells. As a result, landfill and illegal dumping of waste oyster shells have become an increasingly serious issue since 2011. In this research, the problems generated by the oyster shells were investigated through surveying activities. One of the possible alternative solutions that can process large amount of waste economically was found to be the application of oyster shells as a construction materials.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.598-601
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• 2003

건축공사의 규모가 대형화, 복잡화, 다양화 되면서 여러 현장에서 공사수행에 따른 많은 정보가 발생하여 본사로 보고 되고 있다. 이러한 정보들 중에서 매개 현장 및 다중 현장을 동시에 관리하기 위해서는 필요정보만을 추출하여 경영진이 의사결정을 할 수 있는 지원체계의 필요성이 증가하고 있다. 하지만 중견건설업체의 경우 대기업과 비교할 때 본사 조직의 미비 및 관리업무 시스템이 취약하여 다중현장 관리가 어려운 실정이다. 특히 이러한 현장관리에 있어서 자원관리는 프로젝트 관리자의 중요한 관리대상이다. 그러나 자원계획을 일정정보와의 연계가 없이 주로 담당자의 경험과 판단에 근거하여 수립하기 때문에 일정이 변경될 때마다 계획을 수작업으로 수정해야하는 실정이며, 이로 인한 불필요한 공기지연이나 재고비용이 발생하고 있다. 본 연구에서는 중견건설업체가 다수 현장을 동시에 관리할 수 있도록 현장의 작업일보와 공정관리 소프트웨어의 연계를 통한 자재소요계획모델을 제시한다.

• 한국건설관리학회논문집
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• 제5권2호
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• pp.106-114
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• 2004

건축공사의 규모가 대형화, 복잡화, 다양화 되면서 개별 현장에서 공사수행에 따른 많은 정보가 발생하여 본사로 보고 되고있다. 이러한 정보들 중에서 개별 현장 및 다중 현장을 동시에 관리하기 위해서는 필요정보만을 추출하여 경영진이 의사결정을 할 수 있는 지원체계의 필요성이 증가하고 있다. 하지만 중견건설업체의 경우 대형건설업체와 비교할 때 본사 조직의 미비 및 관리업무 시스템이 취약하여 다중현장관리가 어려운 실정이다. 특히 이러한 현장관리에 있어서 자원관리의 대부분을 차지하는 자재관리는 프로젝트 관리자의 중요한 관리대상이다. 그러나 자재조달계획을 일정정보와의 연계가 없이 주로 담당자의 경험과 판단에 근거하여 수립하기 때문에 일정이 변경될 때마다 계획을 수작업으로 수정해야하는 실정이며, 이로 인한 불필요한 공기지연이나 재고비용이 발생하고 있다. 본 연구에서는 중견건설업체가 다수 현장을 동시에 관리할 수 있도록 현장의 작업 일보와 공정관리 소프트웨어의 연계를 가정한 자재조달계획 지원모델을 제시한다.

• 한국해양공학회지
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• 제34권5호
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• pp.361-370
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• 2020

We developed a heavy-duty work class ROV trencher named URI-T (Underwater robot it's trencher) that can conduct burial and maintenance tasks for underwater cables and small diameter pipelines. It requires various supporting systems, including a dynamic positioning (DP) vessel, launch and recovery system (LARS), A-frame, and winch in order to perform burial tasks because of its dimensions (6.5 m × 5.0 m × 4.5 m, 20 t) and the tough working environment. However, operating a DP vessel has disadvantages as it is expensive to rent and operate and it is difficult to adjust the working schedule for some domestic coast construction cases. In this paper, we propose a method using a barge instead of a DP vessel to avoid the above disadvantages. Although burying the cable and pipeline using a barge has lower working efficiency than a DP vessel, it can save construction expenses and does not require a large crew. The proposed method was applied over two months at the construction of the water supply in Yokji-do, and the results were verified.

• Structural Engineering and Mechanics
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• 제36권2호
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• pp.207-223
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• 2010

The aim of this study concerns with the construction stage analysis of highway bridges constructed with balanced cantilever method using time dependent material properties. K$\ddot{o}$m$\ddot{u}$rhan Highway Bridge constructed with balanced cantilever method and located on the 51st km of Elazi$\check{g}$-Malatya, Turkey, highway over Firat River is selected as an application. Finite element models of the bridge are modelled using SAP2000 program. Geometric nonlinearity is taken into consideration in the analysis using P-Delta plus large displacement criterion. The time dependent material strength variations and geometric variations are included in the analysis. Elasticity modulus, creep and shrinkage are computed for different stages of the construction process. The structural behaviour of the bridge at different construction stages has been examined. Two different finite element analyses with and without construction stages are carried out and results are compared with each other. As analyses result, variation of internal forces such as bending moment, axial forces and shear forces for bridge deck and column are given with detail. It is seen that construction stage analysis has remarkable effect on the structural behaviour of the bridge.

• 한국주거학회논문집
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• 제12권3호
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• pp.85-95
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• 2001

This study was conducted to develop the Apartment Information System. This integrated information system is designed to provide a large number of users with the convenient, economical, and safe life in the apartment complex. The characteristics of this system are as follows; 1) The system was developed by CAD technology using 2D and 3D methods with Web base. 2) This system has 2-Tire structures which are able to embody the geographic information on the Web base without special Spatial Engine. 3) Since the spatial data applied to this system is a vector file format, the speed of electrical transmission is fast and it makes possible to search spatially for the client method. The results of this study may contribute to make use of the information system for apartment complex as follows; 1) This system can be used together by the communities of apartment residence, maintenance company and construction company. 2) Also this system can help residence to communicate sharing information and can support the apartment management with open information and clarity. Expecially, the practical data gathering was made for this study only.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.699-703
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• 2007

최근 국내 건설업체들의 해외 플랜트 수주는 2003년 이후 지속적인 성장세를 보이고 있다. 2006년에는 254억 달러를 기록하였고, 산업자원부에서 발표한 2007년 1/4분기까지의 집계가 벌써 90억 달러에 육박하고 있다. 향후 세계시장에서의 플랜트 산업은 지속적인 성장을 할 것으로 전망하고 있다. 그러나 이러한 해외 플랜트 수주에 있어 국내 대형건설업체들을 비롯한 중소건설업체들이 중동지역을 중심으로 세계 곳곳으로 뻗어나가는 현 시점에서 플랜트 전문인력 부족이라는 난관에 부딪혀있다. 플랜트 건설산업의 발전속도는 빠르게 증가하고 있으나, 이에 반해 전문기술인력의 충원이 잘 이루어지지 않고, 충원되는 신규인력의 경우에도 세부화된 전공 이수자이기에 그에 따른 새로운 교육이 필요하고 빠른 현장 투입이 불가능한 실정이다. 또한 사업관리, 파이낸싱 분야의 인력도 크게 부족하다. 따라서 본 연구에서는 플랜트 산업의 경쟁력 강화를 위하여 전문 인력양성을 위한 효율적인 방안에 대해 알아보고, 현실적인 대안을 제시하고자 한다.

• 한국시스템다이내믹스연구
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• 제2권2호
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• pp.25-40
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• 2001

This paper describes the forecast of power plant construction in a competitive korean electricity market. In Korea, KEPCO (Korea Electric Power Corporation, fully controlled by government) was responsible for from the production of the electricity to the sale of electricity to customer. However, the generation part is separated from KEPCO and six generation companies were established for whole sale competition from April 1st, 2001. The generation companies consist of five fossil power companies and one nuclear power company in Korea at present time. Fossil power companies are scheduled to be sold to private companies including foreign investors. Nuclear power company is owned and controlled by government. The competition in generation market will start from 2003. ISO (Independence System Operator will purchase the electricity from the power exchange market. The market price is determined by the SMP(System Marginal Price) which is decided by the balance between demand and supply of electricity in power exchange market. Under this uncertain circumstance, the energy policy planners such as government are interested to the construction of the power plant in the future. These interests are accelerated due to the recent shortage of electricity supply in California. In the competitive market, investors are no longer interested in the investment for the capital intensive, long lead time generating technologies such as nuclear and coal plants. Large unclear and coal plants were no longer the top choices. Instead, investors in the competitive market are interested in smaller, more efficient, cheaper, cleaner technologies such as CCGT(Combined Cycle Gas Turbine). Electricity is treated as commodity in the competitive market. The investors behavior in the commodity market shows that the new investment decision is made when the market price exceeds the sum of capital cost and variable cost of the new facility and the existing facility utilization depends on the marginal cost of the facility. This investors behavior can be applied to the new investments for the power plant. Under these postulations, there is the potential for power plant construction to appear in waves causing alternating periods of over and under supply of electricity like commodity production or real estate production. A computer model was developed to sturdy the possibility that construction will appear in waves of boom and bust in Korean electricity market. This model was constructed using System Dynamics method pioneered by Forrester(MIT, 1961) and explained in recent text by Sternman (Business Dynamics, MIT, 2000) and the recent work by Andrew Ford(Energy Policy, 1999). This model was designed based on the Energy Policy results(Ford, 1999) with parameters for loads and resources in Korea. This Korea Market Model was developed and tested in a small scale project to demonstrate the usefulness of the System Dynamics approach. Korea electricity market is isolated and not allowed to import electricity from outsides. In this model, the base load such as unclear and large coal power plant are assumed to be user specified investment and only CCGT is selected for new investment by investors in the market. This model may be used to learn if government investment in new unclear plants could compensate for the unstable actions of private developers. This model can be used to test the policy focused on the role of unclear investments over time. This model also can be used to test whether the future power plant construction can meet the government targets for the mix of generating resources and to test whether to maintain stable price in the spot market.