• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.302-305
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• 2007

현재 통신용 강관전주는 상, 하로 2 분할된 강관을 조립하여 대부분 사용하고 있다. 콘크리트전주에 비해 가볍고, 길이가 짧기 때문에 도심지 등 협소한 지역에서도 시공이 가능하며 특히 소규모 인력으로 시공이 가능하다. 하지만 전주의 단면이 작아 별도의 기초 보강을 하지 않고서는 지반의 지지력이 부족하여 전주가 기울어지거나 전도되는 현상이 빈번히 발생하고 있으며, 또한 운반을 용이하게 하기 위하여 2 분할한 강관의 조립 부분에서의 꺽임 현상이 발생하여 도시 미관을 해치고 있는 실정이다. 통신전주의 안정성을 확보하기 위해서는 전주 자체가 보유한 강도를 발휘할 수 있도록 충분한 지반지지력이 확보되어 있어야 한다. 강관전주의 휨강도 실험 및 현장 지반지지력 실험을 통해 충분한 지반지지력을 확보할 수 있는 공법을 도출해 내고, 현재 강관전주의 지반지지력 보강을 위해 사용하는 콘크리트블록 설치 방식이 아닌 시공 편리성 및 안정성을 개선한 기초콘크리트 방식을 제시하고자 한다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.523-526
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• 2002

In the bearing wall systems, a form work has a lot of room that saves cost because it takes a substantial proportion of construction cost. Therefore the systemic and efficient methods are required in the form work. This study focuses on methods that enhance the quality and the productivity of form work and presents the kicker form as an alternative plan to simplify the form work through being modular and automatical it. Work sampling method is used for productivity measurement. It is expected that it will reduce the work process and improve the Qualify and the podructivity of construction.

• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.3-11
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• 2016

CM at Risk has been introduced in Korea to keep up with the global standards of construction management and provide a higher quality of cm service in line with a rapid change of the construction industry recently. However, it is widely considered that more time would required to settle down the system due to a lack of understanding towards CM at Risk, shortage of reliability and low capability to manage and undertake CM at Risk. Therefore, this research is analyzed problems of contract types, open book policies, and contract conditions of 33 numbers of projects undertaken by a bespoke domestic construction management firm in this research. Moreover, this research is suggested a method to establish an open book policy of CM at Risk aiming a better customers satisfaction through staff training, simplifying and improving a payment system, and a way to settle down an open book policy by improving a performance management system on site. It's expected that this research will contribute to a more competitive system with more dominating the market and a differentiation of the service so as clients to rely more on the CM at Risk.

• Korean Journal of Construction Engineering and Management
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• v.23 no.2
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• pp.24-32
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• 2022

In Korea, the productivity of the construction industry is evaluated at a very low level, and the utilization of the elemental technology of the Fourth Industrial Revolution is also very low compared to other industries. In order to solve this problematic situation, it is necessary to identify the demand for technology improvement in the specialty construction industry that is directly in charge of construction in projects. Therefore, this study aims to investigate improving construction competitiveness and the demand for technology improvement in Korea's specialty construction industry. First, the concept and status of classification of the specialized construction industry were identified, and a questionnaire was organized. Second, a survey was conducted on experts construction experts, and the demand for technical improvement of the specialty construction industry was derived by applying AHP and cluster analysis. The results of this study will serve as a practical reference for policy development, R&D direction, and technology development roadmap to enhance construction competitiveness in the future, and ultimately will help to present directions to improve the construction competitiveness of the construction industry.

• Magazine of korean Tunnelling and Underground Space Association
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• v.13 no.5
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• pp.50-59
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• 2011

• Journal of the Korean GEO-environmental Society
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• v.5 no.3
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• pp.5-15
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• 2004

SIP has been widely used as a low noise and vibration piling method in Korea. But the quality control of SIP was not properly settled down and field workers did not fully understand the principle of SIP method. So not a less troubles were raised at construction site and bearing capacity was not fully mobilized. To settle these problems, Korea National Housing Corporation amended the construction and load test criteria of SIP in 2002. After load tests on the SIPs installed in field according to the new criteria, we found that the bearing capacity in field vs the design load ratio increased and bearing characteristics was enhanced than that installed by the former criteria. To consider the enhanced bearing characteristics in the pile design and determine the adequate design criteria, this paper analyzed the accuracy of design criterion which were commonly used in Korea comparing with the load test results. Analysis result shows that Meyerhof criteria(1976) properly simulates the bearing capacity of SIP installed by the new construction and load test criteria.

• Korean Journal of Construction Engineering and Management
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• v.11 no.4
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• pp.3-11
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• 2010

Currently the quality of construction drawings is deteriorated due to restrictions on time costs allowed to the design phase. Moreover shop drawings are arbitrarily produced without the standard criteria, and cleared off after the completion of construction. As a result, the information of produced shop drawings is not feedback to the design phase, and the quality of the construction drawings become worse. This study proposes checklists that include information requested at construction sites and the shop drawings as well as the existing checklists for the construction drawings. The checklists integrate designer's check-items according to breakdown of drawings and contractor's check-items base don construction process. Index matrices of the integrated checklists is developed for practical application of the checklists, and validated through intensive interview with design and construction practitioners.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2011.04a
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• pp.95-98
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• 2011

건설공사 프로젝트는 사전 기획 단계, 설계, 계약, 시공, 운영 및 유지관리 등 각 단계의 다양한 참여 주체에 의해 프로젝트가 진행되고 각 분야 간의 원활한 의사소통을 통한 협력 작업으로 일을 진행한다. 그러나 각 단계별 참여주체간의 협업이 어렵고 정보교류가 원활하지 못한 문제점들이 있다. 또한 건설공정은 현장여건의 변화와 불확실성으로 인해 예측이 어렵고, 보다 신뢰성이 있는 계획의 부재로 인하여 각종 세부 공정들 간의 간섭을 유발하고 계획된 일정을 준수하기 어려워 불필요한 비용의 낭비와 공사기간의 증가를 야기한다. 이러한 낭비요인을 최소화하고 건축 프로젝트를 진행하는데 있어서 효율성을 높이기 위해서는 시공계획 단계의 신뢰성을 높여야 한다. 따라서 시공전의 계획 단계에서부터 4D 시뮬레이션을 통하여 이러한 문제점들을 파악하고 개선하는 것이 중요하다. 본 연구에서는 BIM기반의 시뮬레이션 프로그램의 기능분석을 통하여 효율적인 적용과 발전과정을 알아보고자 한다.

• Korean Journal of Construction Engineering and Management
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• v.19 no.3
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• pp.79-88
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• 2018

Construction business VE is classified into design stage VE and construction stage VE. The faster the application, the better the effect. Therefore, the design stage VE was legislated in 2000 and actively applied. However, it is urgent to activate the construction VE, which is complementary to the design VE system. In the meantime, we have made a lot of efforts to activate construction VE by suggesting the necessity of construction VE system, improvement of technology development compensation system, concrete implementation method of construction VE, but it was not effective due to lack of related laws. This study compares and analyzes construction VE system in Korea and abroad for the activation of construction VE after recognizing such domestic reality. A survey of experts in each field of the construction industry was conducted and suggestions for improvement of construction VE system suitable for domestic construction industry were suggested.

• Proceedings of the Korea Concrete Institute Conference
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• 1992.10a
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• pp.119-124
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• 1992

최근들어 고속도로, 고속철도,지하철 등의 건설이 급격히 증가함에 따라 터널의 건설이 늘어나고 있다. 이러한 터널등의 건설에서 필수적으로 따르는 것이 숏크리트의 시공이며 이러한 숏크리트의 시공은 앞으로 더욱 증가할 추세에 있다. 그러나 숏크리트의 광범위한 시공에도 불구하고 현재 여러 가지 문제점을 내포하고 있는 것이 사실이다. 따라서 본 연구에서는 우리나라 현행 숏크리트의 현황과 문제점을 도출하여 성능개선을 위한 최적 배합을 도출하고 고품질의 숏크리트 시공을 위하여 실리카퓸 숏크리트의 개발 및 적용과 인성(Toughness)과 연성(Ductility)을 대폭 증가시키고 시공속도를 빠르게 하여 안전성과 함께 경제성을 확보할 수 있는 강섬유보강 숏크리트의 개발 및 적용에 대한 연구를 집중적을 수행하였다. 본 연구로부터 숏크리트의 최적 배합을 도출하였고 강도와 내구성을 함께 증가시키고 리바운드율을 대폭 감소시킬 수 있는 실리카퓸 숏크리트를 개발하였다. 또한 wiremesh를 대체할 수 있는 강섬유보강 숏크리트를 개발하여 실내시험 및 현장 적용성 시험을 수행하였다.