• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.639-640
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• 2015

Traditional construction planning based on historical data and heuristic adjustment can no longer incorporate all the operational details and guarantee the expected performance. The variation between the expected and the actual production leads to cost overruns or delay. Although predicting reliable productivity on construction site is getting more important, the difficulty of this increases. In this regard, this paper suggested to develop BIM-integrated simulation framework. This framework could predict productivity dynamics by considering factors affecting on construction productivity at operational phase. We developed the following processes; 1) enabling a BIM model to produce input data for simulation; 2) developing the construction operation simulation; 3) running simulation using BIM data and obtaining productivity results. The BIM-integrated simulation framework was tested with structural steel erection model because steel erection work is one of the most critical process influencing on the whole construction budget and duration. We could improve to predict more dynamic productivity from this framework, and this reliable productivity helps construction managers to optimize resource allocation, increase schedule reliability, save storage cost, and reduce material loss.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1237-1241
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• 2009

With the average life expectancy increasing thanks to better standards of living and medical technology, the number of elderly construction workers in construction sites rises every year to surpass the 450 thousand people in the construction industry (24.7% of all employees in the construction industry). Similarly, the percentage of fatal accidents involving elderly workers has stood at 41~46 percent for the past five years; note that this is significantly higher than the other age groups, making safety measures for dealing with this issue a matter of urgency. This study sought to propose appropriate safety guidelines for elderly construction workers aged 50 years and over by examining the changes in their physical and psychological functions and through the subsequent analysis of the current status and causes of fatal accidents involving them. The guidelines targeted ferroconcrete construction where accidents occur quite often; construction was classified into mold construction, reinforcing rod construction, and concrete construction. Mold construction was further classified into preparation, carry-in, processing, assembly, and disassembly, and reinforcing rod construction, into preparation/transport and processing/assembly. Safety guidelines for each process were presented by dividing them into three aspects considering the changes in the physical and psychological functions according to their ages and type of accident causes: work environment improvement, machinery and equipment improvement, and work method improvement.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.566-572
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• 2009

Turn-key and CMF(CM for Fee) have been selected as procurement paths of large public projects in Korea. However, recently, researches and discussions on CMR(CM at Risk) have been popular as the Korean government seeks for alternative procurement paths to enhance the performance. In the CMR projects, the part who is responsible for construction management should predict and control the potential risks for guaranteeing benefits. In this paper, CMR projects in which a general contractor plays the role as CMr is mainly analyzed. We give attentions to risk management during construction process given that subcontractors, main parts in this phase, work in various ways and thus more chances for faults exist. In this case, for the general contractor, to recognize potential risks in previous to start construction works of subcontractor by means of virtual design and construction (VDC) must be essential to this end. The case study of practices on VDC in U.S in which CMR has been introduced can provide considerable aspects to implement it in Korea.

• 건축역사연구
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• 제29권5호
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• pp.17-28
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• 2020

The general contractor business in South Korea settled in the railway construction during the Daehan Empire, but depending on the construction intention and circumstances of the railroad, relationship among employer-contractor-subcontractor and their roles under the system of the construction process had changed. At the time of laying the Gyeongin and Gyeongbu-rail, the Empire, which had no capital and technology, passed all the power and responsibility of the rail laying to the contractor, who was involved in most of the process. After this, the empire tried to lay Gyeongui-railroad without the help of other countries. Japan prepared for the Russo-Japanese War and decided to construct the railway rapidly, and completed the railway in parallel with direct management work and contract work. From that time on, the general contractor would only do the work. During the construction of railroad in Daehan empire, the general contract business system was established. The ambiguous process was sorted out and divided. At this time, subjects in charge of design and construction has been divided. The internal organization of the project owner and the contractor were organaized and specialized.

• 한국건설관리학회논문집
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• 제23권5호
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• pp.77-86
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• 2022

건설현장에서의 안전사고는 근로자의 생명을 앗아가는 중대한 사고로 이어질 수 있고, 정부차원에서 산업재해 감소를 위해 많은 노력을 기울이고 있는 만큼 건설현장에서 재해발생과 밀접한 관련이 있는 안전관리자의 역할이 중요해지고 있다. 하지만 현행 건설업 안전관리에 있어 안전관리자가 담당하는 업무량이 과도하게 많고, 효율적이지 못한 업무들로 인해 직무 스트레스가 많이 발생하고 있다. 따라서 업무내용의 개선 및 간소화가 필요한 실정이다. 본 연구의 주된 목적은 안전관리자 안전관리 단계의 업무들을 난이도와 예방효과에 대해 전문가 의견과 설문조사를 통해 2×2 Matrix 분석 기법을 활용해 비효율적인 업무의 간략화 및 개선이 필요한 업무들을 파악하고 개선방향을 제시함으로써, 궁극적으로 건설현장의 안전사고 발생을 줄이는 데 기여하고자 한다.

• 대한건축학회연합논문집
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• 제21권6호
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• pp.65-71
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• 2019

In Korea, there is a lack of adequate safety management for small-scale construction work, particularly when compared to large-scale construction projects. The number of construction disasters is also higher on small-scale construction sites. In this regard, this study aimed to develop the application prototype to support the safety management of small-scale construction projects. The major findings of the research are as follows. 1) About 60% of construction disasters and death occurred on small-scale construction sites over the last two years. In addition, institutional support and costs for safety management were found to be insufficient. 2) The items of the application for the small-scale construction safety management were constructed on the basis of the safety management of large-scale construction work. The contents of the application were confirmed based on a survey of small-scale construction project managers. 3) The application algorithm was developed with a focus on the roles of management subjects and information exchange. For transition from the application prototype presented in this study to a commercial product, further research needs to be conducted regarding the reflection of user requirements and application management subjects.

• 한국안전학회지
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• 제30권4호
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• pp.128-134
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• 2015

The number of schools which have passed 30 years after the construction takes up 30% (5% falling to class D and E) in Korea. So, the offices of education across the nation conduct large works for the expansion, improvement and renovation of the school. But as the work takes a lot of time, the work is also conducted while the students are studying at the schools. The work at the school causes the noise, dust, vibration as the school often has the reinforced concrete structure. So, as the windows are closed to prevent the nuisance from hampering the education, the problems related to the illumination, ventilation, and control of humidity and temperature are give damages to students studying the school buildings. Actually, as the current renovation or expansion is conducted across the nation due to the implementation of the new education system and the resulting integration and construction of hub school, specialized school, meister school and it causes a lot of nuisance to the learning students and others, there are a lot of complaints from concerned people. Accordingly this study suggests the method of evaluating the factors which affect the learning environment such as the noise, dust or fine dust and reducing the nuisances to the level proper for the learning environment when the existing school is expanded, improved or renovated.

• 대한건축학회연합논문집
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• 제20권6호
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• pp.97-104
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• 2018

Recently, as the shape and function of high-rise buildings have become more complex, engineering for reflecting the constructability in the design phase has the increasing importance. However, engineering tasks are not performed at the appropriate level and timing in most projects, which leads to inefficient work such as design changes and reworks. Hence, this study investigated the constructability knowledge, design elements, and supporting tools required to conduct engineering tasks related to temporary work at the design phase, and also analyzed the relationship between these factors using the correlation analysis. As a result, when the engineering tasks are applied in the design phase, constructability knowledge related to 'construction method and process' is the most important and the design factor related to 'layout/arrangement' should be considered as the most important factor. Based on the results of this study, the project participants can efficiently use necessary constructability knowledge during the design phase and facilitate effective decision-making and design alternatives for enhancing constructability.

• 한국건축시공학회지
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• 제11권2호
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• pp.136-144
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• 2011

콘크리트 구조물의 골조공사에서의 주요 공정 중 하나인 거푸집 공사는 전체 건축공사의 공사기간 및 공사비 측면에서 상당 부분을 차지하고 있다. 하지만 공사현장의 조건을 고려한 거푸집의 적정시스템 선정은 현재까지 현장실무자의 경험에만 의존하고 있는 실정이다. 본 논문에서는 거푸집 공법 선정 요인에 대한 정량화된 분석을 바탕으로 슬래브 거푸집 중 신공법과 기존 공법을 선정하여 각 공법의 성능을 정량화된 분석데이터를 바탕으로 평가했다. 이를 통하여 각 공법들의 정성적 항목에 대한 정량화된 평가점수를 산출하여 슬래브 거푸집의 현장 적용성에 대한 평가 방안을 제시하였다. 따라서 본 논문에서 사용된 델파이 기법의 방법론은 다른 공법들의 선정, 평가에도 사용될 것이라 사료된다.

• 한국건설관리학회논문집
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• 제21권1호
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• pp.61-69
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• 2020

건설 프로젝트d의 대형화, 복잡화, 다양화로 인해 건설공사에서 발생되는 정보의 양이 기하급수적으로 증가하고 있다. 이에 설계 및 시공 검토가 현장 성공 여부에 치명적인 영향을 미치고 있다는 사실을 인지하고, 이를 위한 다양한 노력들이 학계와 산업에서 활발하게 이뤄져 왔다. 설계, 계획 및 유지관리 등 건설 전 단계에서 BIM의 활용은 늘어나고 있는 추세이고, 현재 건설 산업에서 사용되는 표준 중의 하나로 받아들여지고 있다. 하지만 가시설물을 위한 전문화된 소프트웨어가 없을 뿐만 아니라 전문적인 기술자가 절대적으로 부족하여 BIM기반 가설공사 설계는 2D 설계를 완료한 후 3D로 형상화하여 보조수단으로 활용된다. 이에 본 연구에서는 BIM기반 가시설물 설계 및 물량산출, 현장점검 업무의 인간적인 실수(Human error)를 최소화하고 업무시간을 단축할 수 있도록 하여 업무 효율을 높일 수 있는 BIM기반 업무지원시스템을 개발하고자 한다.