• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.181-186
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• 2006

Estimation based on current data of construction performances have become one of the critical subjects which many researchers have been interested in for the past decades. In order to accomplish accurate measurement and estimation of construction performances, the method of data collection stands the highest priority. However, there are many difficulties in data collection from construction jobsite due to the characteristics of the construction industry. With developments of new technologies in other industries, several technologies has recently initiated to be applied to construction field. Electronic tags based on the identification technology, automatic volume measurement based on laser scanning technology, and Global Positioning System (GPS) have been represented the technologies which show the high opportunity for being used in construction. This study reviews specific aspects of these technologies focused on the utilization in construction jobsite. Also, the challenges which these technologies need to overcome are discussed.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.235-236
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• 2016

The importance of construction management has been increasing due to the fact that complex construction projects blend several different industries depending on the traits of the construction. This research was conducted to search for a method to enhance efficiency in cost management of construction project and meet the need for reusability of accumulated construction information. The process of detailed estimation and methodology for using standard unit price information has been developed to strengthen the interoperability in cost information by utilizing a standard classification system. The concept of ontology is proposed as a method of connecting construction information based on a standard breakdown structure to increasing the connectivity of the cost information in the construction project. Therefore, construction information knowledge framework is developed in order to improve the efficiency of the detailed estimation work process.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.196-197
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• 2022

This study aims to come up with the revision of construction standard unit price for concrete pavement works to improve its applicability and availability by a construction site survey. Construction site survey was conducted from March to November 2021 with 36 construction sites. This results of the revision are expected to support to public construction project owner or estimator in construction cost estimation works.

• 한국건축시공학회지
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• 제13권1호
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• pp.66-74
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• 2013

In the early stages of a construction project, the most important thing is to predict construction costs in a rational way. For this reason, many studies have been performed on the estimation of construction costs for apartment housing and office buildings at early stage using artificial intelligence, statistics, and the like. In this study, cost data held by a provincial Office of Education on elementary schools constructed from 2004 to 2007 were used to compare the multiple regression model with an artificial neural network model. A total of 96 historical data were classified into 76 historical data for constructing models and 20 historical data for comparing the constructed regression model with the artificial neural network model. The results of an analysis of predicted construction costs were that the error rate of the artificial neural network model is lower than that of the multiple regression model.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.222-229
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• 2022

Although stochastic programming and feedback control approaches could efficiently mitigate the overdue risks caused by inherent uncertainties in ground conditions, the lack of formal representations of planners' rationales for resource allocation still prevents planners from applying these approaches due to the inability to consider comprehensive resource allocation policies for hard rock tunnel projects. To overcome the limitations, the authors developed an ontology that represents the project duration estimation rationales, considering the impacts of ground conditions, excavation methods, project states, resources (i.e., given equipment fleet), and resource allocation policies (RAPs). This ontology consists of 5 main classes with 22 subclasses. It enables planners to explicitly and comprehensively represent the necessary information to rapidly and consistently estimate the excavation durations during construction. 10 rule sets (i.e., policies) are considered and categorized into two types: non-progress-related and progress-related policies. In order to provide simplified information about the remaining durations of phases for progress-related policies, the ontology also represents encoding principles. The estimation of excavation schedules is carried out based on a hypothetical example considering two types of policies. The estimation results reveal the feasibility, potential for flexibility, and comprehensiveness of the developed ontology. Further research to improve the duration estimation methodology is warranted.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2004년도 제5회 정기학술발표대회 논문집
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• pp.256-260
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• 2004

군 시설공사비는 국방예산의 많은 부분을 차지하고 있으며, 사업예산의 합리적인 편성은 군 시설업무 관련자의 중요한 관심사이다. 그러나 시설예산 편성시 기준으로 제시되는 시설물 단가를 실제 공사의 집행금액과 비교하면 항상 부족예산이 발생되므로, 이를 보정하여 적정한 공사비를 산정하는데 어려움을 겪고 있다. 이러한 문제를 해결하기 위해 과거의 실적공사비를 현재의 가치로 환산할 수 있는 공사비지수를 개발하여 적용함으로써 예산편성 업무의 효율성을 높이고 합리적인 의사결정을 지원하고자 한다. 본 연구는 실적공사비를 분석하여 공사비 결정에 중요한 영향을 끼치는 요소들을 도출하였다. 도출된 영향요소를 재료비, 노무비, 경비의 비목으로 구분하고 각 요소들이 공사비에서 차지하는 영향도를 기준으로 가중치를 산정한 후, 가중평균산식에 의한 공사비지수를 개발하였다.

• 한국건축시공학회지
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• 제12권3호
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• pp.266-274
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• 2012

The annual expenditure on diesel oil and heavy oil in the construction sector is the second largest among all industrial sectors. To meet the government's greenhouse gas reduction targets, the construction sector has until 2020 to cut its emissions by 7.1%. Unlike other high-tech industrial sectors, the construction sector has a fairly limited scope for technological improvements, which hampers its capacity to achieve the reduction target. To reduce emissions, it is necessary to establish an energy and emissions strategy at the project planning stage, and energy use and the resulting emissions must be estimated. This research aims to establish an estimation methodology for greenhouse gas emissions at the planning stage of construction projects. To estimate the project-related emissions, this research indentified the relationship among the types of emissions in a cross-sectional matrix form, and then provided a set of calculation methods for total project related emissions.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.198-199
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• 2022

Reinforced concrete is the most widely used construction method for constructing structures. There is a lot of process for constructing Reinforced concrete structures such as installing rebars, molds and support, mixing and placing concrete, and curing. So the reinforced concrete work accounts for a large part of the total construction cost for constructing structure. For this reason a reasonable standard for estimating the cost of reinforced concrete construction has to be established and it will be possible to secure appropriate costs for construction work. In this study, we analyze the revision factors of the standard for estimating the cost of reinforced concrete construction and present them to secure reasonable construction costs.

• 한국산학기술학회논문지
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• 제19권12호
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• pp.702-708
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• 2018

3D 프린팅 기술은 기존 산업계의 생산 패러다임을 변화할 수 있는 4차 산업혁명의 주요기술로 큰 관심을 받고 있다. 건설분야의 특성으로 인해 3D 프린팅의 기술 도입이 타 산업분야에 비해 느리지만, 향후 생산인구의 감소와 생산성 및 안전도 향상 등을 위해 3D 프린팅을 활용한 건설 자동화가 필요하다. 본 연구에서는 3D 프린팅을 건설에 도입하기 위한 사전준비로서 건설 3D 프린팅 공종분류체계와 기존 표준품셈체계와의 연계방안을 제시 한다. 이를 위해 건설 및 3D 프린팅 관련 전문가 자문을 바탕으로 기존 건설 3D 프린팅 기술을 바탕으로 가상의 시나리오를 작성하였다. 시나리오에 따라 3D 프린팅 공사 수행에 필요한 16개의 공종을 도출하였다. 기존 공종분류체계와 표준품셈을 분석하고 도출된 3D 프린팅 공종을 연계하였다. 기존 분류체계와 동일한 3D 프린팅 공종도 있었으며 기존에 존재하지 않는 공종은 유사한 분류체계 하위에 추가하는 등 4가지 타입으로 구분하였다. 본 연구의 결과는 향후 3D 프린팅 공사관리 및 원가산정에 도움이 될 수 있을 것으로 기대된다. 향후 3D 프린팅 공사 수행을 통해 실질적인 품셈 산출이 필요하다.

• 한국건축시공학회지
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• 제1권2호
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• pp.179-184
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• 2001

The most recent building trend is going large, high rise, high strength as overlarge project is developing in domestic construction business. Belite cement has properties like low heat, excellent long term strength, and durability without admixture(fly ash, silica fume). so, Beilte cement is suitable for mass structure which is needed high strength, high fluidity and low heat property. This study is to examine the possibility if site adoption microwave-use early strength estimation method. Based on the existed study related the portland cement, the interrelation between Belite cement and microwave-use early strength estimation method is required. In this study, interrelation between mortar and Evaluating strength estimation method is investigated before the concrete experiment.