• 한국수소및신에너지학회논문집
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• 제27권3호
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• pp.256-263
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• 2016

As the hydrogen era comes near future, hydrogen fuel cell vehicles are core of hydrogen economy. Until now, Korea has 17 hydrogen refueling stations but 9 hydrogen refueling stations have been retired already and 8 hydrogen refueling stations are still running. With a limited number of hydrogen refueling stations, it is very difficult to get scientific data for the economy of hydrogen refueling stations in Korea. Thus, based on NREL(National Renewable Energy Laboratory) study, we analyzed most recent data for the construction of hydrogen refueling stations in one specific site in Korea. The cost comparison data between Korea and USA shows 14% difference, saying higher costs of Korea. Korea looks 5 years delay compared to USA. This data will be an important tool for the investment from every industrial parties.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.61-62
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• 2011

Construction plans for large construction projects are problems such as Incompatibility of information, omissions due to technical limitations of 2D CAD. In addition to, Plan established for the validation such as process, cost and construction technology plan is difficult. By occurring Frequent changes in the course of business, Inefficiency of management has occurred. In the construction process, there is occurred costs and construction delays due to reconstruction or communication error. In this study, It was deemed BIM will complement Existing 2D CAD problem. And, BIM case studies in the construction phase of domestic construction were analyzed, How to apply BIM in the construction phase investigated.

• Journal of Construction Engineering and Project Management
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• 제4권4호
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• pp.33-40
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• 2014

Maximizing the profitability and minimizing the duration of construction projects in extreme weather regions is a challenging objective that is essential for project success. An optimization model is presented herein for the time-profit trade-off analysis of construction projects under extreme weather conditions. The model generates optimal/near optimal schedules that maximize profit and minimize the duration of construction projects in extreme weather regions. The computations in the model are organized into: (1) a scheduling module that develops practical schedules for construction projects, (2) a profit module that computes project costs (direct, indirect, and total) and project profit, and (3) a multi-objective module that determines optimal/near optimal trade-offs between project duration and profit. One example is used to show the impact of extreme weather on construction time and profit. Another example is used to show the model's ability to generate optimal trade-offs between the time and profit of construction projects under extreme weather conditions.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.643-648
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• 2005

The planning process for roadway construction involves a large amount of information on design, construction methods, quantities, unit costs, production rates, and site conditions. Therefore, it is very important to acquire, manage, and process the necessary information efficiently to produce a rigorous construction plan. GIS (Geographic Information System) is a very effective tool for integrating and managing various types of information including spatial and non-spatial data required for roadway construction planning. This paper proposes a GIS-based system for improving roadway construction planning with its 'Interactive Space Scheduling' and 'Operation Level Planning' functions. The proposed system can assist construction planners in a unique way by integrating design and construction information and creating modularized design elements for space scheduling in real time. It is expected that the proposed system could improve the efficiency of roadway construction planning.

• 한국건설관리학회논문집
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• 제19권2호
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• pp.61-72
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• 2018

공공 건설사업에서 발생하는 갈등은 공사비 증가, 공기 지연뿐만 아니라 사회적 비용의 낭비를 초래하며 성공적이지 못한 사업으로 이어진다. 따라서 갈등의 유형을 진단하여 선행사례를 통해 적절한 해결방안을 모색하는 것이 중요하다. 본 연구에서는 국내외 많은 문헌들을 고찰하여 갈등의 원인이 되는 갈등 요인을 도출하고 평가할 수 있도록 평가 기준을 수립하여 갈등을 유형화하였다. 30개의 사례에 대해 갈등 요인을 평가를 받고 군집분석을 통해 유사한 사례들을 군집화 하였다. 3개의 군집으로 구성되었으며, 각 군집의 특성에 따라 사례를 분석하여 '유해성 및 님비 시설물 갈등 군집', '환경 및 공해 갈등 군집', '핌피 및 소형 갈등'이라고 명명하였다. 추후 공공 건설사업에서 갈등 발생 시 본 유형화 기준에 따라 갈등을 평가하고 어떤 유형의 갈등인지 파악한 후 해당 군집의 선행 사례를 통한 효과적인 선행사례를 모색하여 빠르고 효과적인 갈등 해결에 도움이 되고자 한다.

• 한국건축시공학회지
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• 제16권5호
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• pp.463-470
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• 2016

건설회사들이 실제 발생한 공사손실을 감추기 위해 사실과 다른 공사진행률을 적용함에 따라 공사진행기준에 의한 건설업의 순이익이 부정확하다는 평가를 받고 있다. 따라서 본 연구는 공사진행기준을 통해 산출되는 건설업 순이익정보의 질적 수준이 다른 산업에 비해 실제로 낮은 지에 대하여 정보적 유용성 측면에서 검증하였다. 연구 결과 공사진행기준을 적용하여 산출된 건설회사 순이익의 정보적 가치를 낮게 평가하여 투자의사결정에 적극적으로 이용하지 않고 있으며, 순이익정보와 주식가격 사이의 연관성이 떨어지는 것으로 확인되었다. 이러한 결과는 실무적으로 신뢰성 있는 공사진행기준의 적용과 감독기관의 엄정한 관리감독이 필요함을 제시하고 있다.

• 한국건설관리학회논문집
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• 제19권5호
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• pp.111-120
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• 2018

국내 공공 공사는 최근 공기연장 추가간접비 산정에 대한 기준의 불명확성에 따른 논란이 가중되면서 분쟁이 다대하게 발생하고 있다. 또한 연구자들도 이러한 제도의 불명확성 및 분쟁의 발생을 저감시키기 위한 노력으로 여러 제도 및 적정 실비산정을 위한 연구를 진행해 왔으나 아직 사회적 합의를 이끌어낸 기준이 부재한 실정이다. 한편 회계의 인식기준에 따른 분류체계에 대한 연구는 체계적으로 이루어져 발생주의와 현금주의에 대한 개념을 구분하여 정의하였다. 본 연구는 '발생주의'의 개념이 공기연장 추가간접비 산정기준에 적용될 수 있는 가능성을 확인하는 것을 목적으로 하였다. 이에 현장관리비 발생패턴을 분석 결과 현금주의 방식으로는 적정한 산정기준으로 산정하기 어려운 실비가 있는 것으로 확인하였으며, 특히 간접노무비 및 복리후생비와 같이 현장관리비에서 비중이 큰 항목의 경우에는 발생주의 방식의 요구가 더욱 엄정하게 제시되어야 한다는 시사점을 알 수 있었다. 또한 시공사의 청구보고서와 법원의 감정보고서를 조사하였다. 결과는 현재 공기연장 추가간접비 산정 실무는 현금주의 산정방식으로 편중되어있다는 점을 확인하였으며, 발생주의 관점으로부터 실비산정기준을 보완하여야 할 것을 대안으로 제시하였다.

• 대한건축학회논문집:계획계
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• 제34권3호
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• pp.23-34
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• 2018

Due to a waste of energy in korea, about 525,000 which are 75 percent of total buildings are at least 15 years old buildings that need remodeling. There are two current remodeling systems. One is a remodeling system to reduce a waste of resources from the reconstruction. The other is a green-remodeling system aimed to energy savings and reducing environmental costs. This study is to analyze quantitatively these current systems with respect to the cost-benefit caused by the life cycle and suggests the political and institutional implications through the interpretation of the results. For a quantitative analysis, we analyzed reducing maintenance costs and rent benefits with simulation by using opportunity costs, construction costs, plan costs and supervision costs as expense variables and using the reduced floor area ratio, institutional incentives, energy, water resources and certified emission reduction(CER) as benefit variables. As a result of the empirical study, the green-modeling was more beneficial in the field of environment such as the energy savings, however, the final benefits of remodeling which has no green building certification costs but more floor area ratio incentives were more economical. The green-remodeling system focused on reducing environmental costs and energy savings needs a equatable institutional incentive system.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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• pp.189-190
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• 2017

The development and utilization performance of the construction new technology was introduced in 2014 according to the detailed evaluation criteria of the construction project of Ministry of Land, Infrastructure and Transport. In the case of the construction new technology, the current standard is give 3 points in the "technology development and investment performance" evaluation item. However, construction engineering companies is difficult for to invest the capital required for new technology development. Therefore, in this study, we try to extract the difficult factor that occur in the process of construction new technology development in terms of construction engineering companies. The research results are expected to provide with the support policy guideline for new technology development costs to policy makers.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.98-99
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• 2014

Construction equipment cost is critical to estimate the total construction costs, particularly in large and complicated projects. Despite its importance, the construction equipment cost may not reflect the current market value since the equipment database is being updated every 6 years at most. To keep construction equipment cost up to date, it is highly recommended to use the standard market price that is reported each year by the Ministry of Security and Public Administration (MOSPA). However, there is still a gap to adopt the standard market price system for the construction equipment cost computing system. Therefore, this paper suggests an effective way to develop a construction equipment cost estimation system.