• 한국기계가공학회지
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• 제14권6호
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• pp.49-56
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• 2015

For designing working devices of construction equipment, it is necessary to consider not only sufficient working ability but also available working range. Therefore, it is important to select the appropriate pivot positions of links. This paper presents a study on selection of pivot points of links used in construction equipment. To analyze the effect of each pivot point, a design program for pivot selection is developed. A conventional pivot design method requires a complicated process because it needs to create a certain working position manually to evaluate its performance. However, the developed program includes an automatic link assembly algorithm; thus, the working device can easily be analyzed by using pivot information of links. The developed program also included a kinematic/static analysis module and characteristic analysis algorithms. Therefore, it is possible to easily analyze a working device model created through the automatic assembly algorithm, whereby users can easily analyze the effect of each link pivot point for the actual product design.

• KIEAE Journal
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• 제14권2호
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• pp.69-75
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• 2014

Building has been deteriorated over the year after construction. The deterioration has caused to hinder the living condition and to decrease the building value. Thus, it is important to prevent or delay the building deterioration as well as to proceed the maintenance. The long-term repair program for the apartment in Korea plays a key role to make the repair plan after construction and to assure the function decent. This is not flexible to the change of the material and component because the program is provided by the Korean-law. Many items are omitted in the long-term program so that the maintenance experts face many difficulties to make a repair plan. In this paper, it aimed at providing the repair cycle and repair ratio according to the repair scope, which are not provided in the current program. This study shows that the repair ratio is presented with quartile range in 25%, 50%, 75% and 100%. This has an advantage to take an overall look in repair items. Under this presentation of the repair ratio, each item has a unique repair value. Second, the repair scope is divided into partly repair, fully repair, partly alteration and fully alteration. If a fully repair has a repair ratio close to 100%, it would mean that a fully repair is a fully alteration. Third, the short repair cycle means that it requires to maintain the function or performance of the components in a short term.

• 한국건축시공학회지
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• 제11권1호
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• pp.9-17
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• 2011

건설프로젝트에서 공기지연은 공정 및 공사비 관리 측면에서 핵심 관리사항에 해당된다. 본 연구는 아파트 건설공사에서 직접비의 상당부분을 차지하는 골조공사를 대상으로 공사부위별 공기지연 수준을 분석하고 대책을 제시한 실증연구로 10개 현장의 공사비 비중분석 결과에 기반하여 골조공사에서 지연이 발생하는 부위의 순위, 원인 등을 분석하였다. 분석결과 1층 골조공사에서 가장 큰 지연이 발생하는 것으로 나타났으며 지연원인을 다양한 분류에 의거하여 분석하고 대책을 제시하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1196-1202
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• 2007

In construction of high speed railway, the fan shape is limited to achieve reduction of required travel time and concrete railway which has structural stability and induces small maintenance cost with allowable ground settlement is recently applied. So construction of concrete railway on soft ground in which considerable ground settlement occurs increases and settlement management in soft ground section is required. Field monitoring on ground movement and integrated geotechnical information system which manages construction, design, and field monitoring data are essential for settlement management of concrete railway subgrade. Site investigation data are also required due to future repair work. Therefore in this study, integrated geotechnical information system for construction and maintenance of concrete railway is developed. The developed system consists of a database and an application program. The database contains site investigation, construction, design, and field monitoring data throughout a railway. Application program performs various functions on managing and utilizing information in the database with graphic visualization of output. And by providing integrating information with comprehensible visual displays, the applicability and effectiveness of the developed system for construction and maintenance management were confirmed.

• 한국건설관리학회논문집
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• 제21권2호
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• pp.70-78
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• 2020

건설 프로그램 관리는 프로젝트의 복잡성과 다양한 이해관계자로 인해 기존의 관리 방식에 비해 좀 더 체계적인 관리가 요구된다. 특히, 최근 종결단계로 갈수록 발주자의 기대와 시공자의 결과물 사이에 차이가 발생하여 인수인계 지연, 갈등과 마찰, 법적 분쟁 증가되고 있어 종결단계 프로세스의 체계화는 절실한 실정이다. 본 연구는 건설프로그램의 성공적인 종결을 위해 국내외 문헌 및 사례조사를 통해 종결단계 프로세스와 업무활동을 제안하였다. 또한 제안된 프로세스와 업무활동을 전문가 검증을 통해서 프로세스 분류의 적정성과 현장 적용가능성에 대해 검증을 하였다. 본 연구에서 제안된 종결단계의 프로세스와 업무활동을 프로그램뿐만 아니라 건설프로젝트 현장에 활용하여 종결단계 업무 한계를 극복하고 발주자의 만족도 향상은 물론 국내 기업의 글로벌 경쟁력 강화에 일조 하고자 한다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2001년도 정보화시공 학술발표회
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• pp.103-122
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• 2001

For prediction of ground movement per the excavation step, observational results of ground movement during the construction was very different with prediction during the analysis of design. step because of the uncertainty of the numerical analysis modelling, the soil parameter, and the condition of a construction field, etc. however accuratly numerical analysis method was applied. Therefore, the management system through the construction field measurement should be achieved for grasping the situation during the excavation. Until present, the measurement system restricted by ‘Absolute Value Management system’only analyzing the stability of present step was executed. So, it was difficult situation to expect the prediction of ground movement for the next excavation step. In this situation, it was developed that ‘The Management system TOMAS-EXCAV’ consisted of ‘Absolute value management system’ analyzing the stability of present step and ‘Prediction management system’ expecting the ground movement of next excavation step and analyzing the stability of next excavation step by‘Back Analysis’. TOMAS-EXCAV could be applied to all uncertainty of earth retaining structures analysis by connecting ‘Forward analysis program’ and ‘Back analysis program’ and optimizing the main design variables using SQP-MMFD optimization method through measurement results. The application of TOMAS-EXCAV was confirmed that verifed the three earth retaing construction field by back analysis.

• 한국건설관리학회논문집
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• 제6권2호
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• pp.69-79
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• 2005

The Purpose of cost Planning at the early Phase of construction Projects is to provide the clients with the appropriate cost information during the design decision-making process. Therefore, the cost planning process is expected not only to predict projects' cost accurately but also closely to coordinate with the design decision-making activities. This paper proposes a new cost planning method for the effective and efficient directions relating a design decision-making process. Strategies for this method are i ) to utilize elemental cost breakdown system, and ii ) to apply probabilistic distribution theories. Based on these strategic direction, this paper proposed a probabilistic cost planning model for high-rise office building projects. The suggested model provides appropriate cost information to meet clients limited budget and various project' requirements during the design decision-making process. This study is based on probabilistic distribution variables theories and the range estimating technique. This study also develops a web-based software program in order to apply the proposed cost planning model effectively in high-rise of office building construction practices.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.332-337
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• 2006

플랜트 기술은 산업의 종합기술로서 관련 산업으로의 파급효과가 큰 반면, 기술력을 갖추기 위해서는 장기간에 걸친 투자가 필요하며, 업계공동 혹은 국가적인 차원에서 플랜트 산업의 장기 발전전략을 수립하여 지속적으로 추진할 필요가 있다. 또한 플랜트분야 고급기술자의 노하우를 축적하고 교육할 수 있는 플랜트 교육프로그램을 서둘러 구축할 필요가 있다. 이를 위해 플랜트 교육 프로그램을 구축하여 정부기관과의 정책에 적극 부응하는 플랜트 정보제공, 기술개발 지원 등 전문적인 교육을 제공할 수 있는 교육 프로그램 개발이 필요할 것이다. 이러한 현실에서 본 연구는 건설 분야에서의 플랜트 교육 프로그램을 조사하여 국내와 국외의 플랜트 교육 현실을 파악하고 향후 국내 플랜트 기술력의 향상을 위해 필요한 교육 프로그램 개발을 위한 기초 조사로써 연구를 수행하고자 한다.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.576-582
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• 2013

Typical highway infrastructure systems include roadway pavement, drainage systems, tunneling, and other hardware components such as guardrails, traffic signs, and lighting. Tunnels in a highway system have provided significant advantages to overcoming various natural challenges including crossing underneath bodies of water or through mountainous areas. While only a few tunnel failure cases have been reported, the failure rate is likely to increase as these assets age and because agencies have not emphasized tunneling asset management. A tunnel system undergoes a deterioration life cycle pattern that is similar to other infrastructure systems. There are very few agencies in the United States implementing comprehensive tunnel asset management programs. While current tunnel asset management programs focus on inspection, maintenance, and operation safety, there is an increasing need for the development of a comprehensive life cycle tunnel asset management program. This paper describes a conceptual framework for a comprehensive tunnel asset management program. The framework consists of three basic phases including a strategic plan, a tactical plan, and an operational plan to provide better information to the decision makers. The strategic plan is a basic long term approach of tunnel asset management. The tactical plan determines specific objectives and the operational plan actually applies asset management objectives in practice. The information includes operational condition, structural condition, efficiency of the system, emergency response, and life cycle cost analysis for tunnel capital improvement project planning.

• 대한토목학회논문집
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• 제30권4D호
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• pp.413-421
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• 2010

공정관리는 건설 프로젝트의 효율적인 수행을 위한 핵심 역량 중의 하나이다. 공정관리를 수행하기 위한 지원 도구로서 많은 상용 공정관리 솔루션이 개발되었지만, 건설 현장에서는 사용법을 잘 알지 못하고 있는 등 여러 가지 이유로 인해 활용도가 높지 않은 것이 현실이다. 본 연구에서는 설문조사를 통해 공정관리 및 관련 솔루션 사용에 관한 현황 및 문제점을 파악하고, 이를 기반으로 상용 공정관리 솔루션 활용도를 높이기 위한 공정표 작성 지원 프로그램을 개발하였다. 개발된 프로그램을 통하여 현장에서의 상용 공정관리 솔루션의 활용성을 높이고, 결과적으로 효율적인 공정관리를 기대할 수 있을 것이다.