• Journal of the Korea Institute of Building Construction
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• v.10 no.1
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• pp.181-191
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• 2010

Lightweight panels are currently used in many ways, such as inner walls of the skyscrapers and residential buildings in Korea. Moreover there has been an increasing of interest in developing construction method and quality improvement as many buildings became higher, because there are more advantages like constructability, finishability, and economic efficiency, etc. than previous heavy weight concrete wall. It is necessary to analyze the characteristics and evaluate the performance of lightweight panels when selecting proper methods and materials to building characteristics and builder's demand. However, there doesn't exist systematic data with a classification of lightweight panels' type and performance. The purpose of this study is to classify domestic lightweight panels by both type of exterior board and construction method, and also to evaluate each performance by surveying user's opinion.

• Korean Journal of Construction Engineering and Management
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• v.23 no.5
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• pp.56-64
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• 2022

Although pilot projects have been actively carried out from 2017 to present to institutionalize CM at Risk, one of the major tasks for innovation in the construction industry, standards and processes related to Design VE, a key tool for determining GMP in the pre-construction phase, have not yet been established. Therefore, through research and operation status related to CM at Risk and Design VE, and survey on project participants' perception, the problem of the existing design VE process was derived, and the design VE process suitable for the CM at Risk project was proposed. The application plan was proposed in three aspects: Schedule, Cycle, and Process, and the appropriateness and applicability were verified through FGI. The results of this study are expected to be used as basic data on the establishment and legislation of order standards to be made in the future.

• Journal of the Korean GEO-environmental Society
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• v.9 no.7
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• pp.25-35
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• 2008

In domestic cases, the standard support pattern of 2-lanes road tunnels is presented because construction experience and high degree various data was abundant. But, it is not desirable to apply standard for 2-Arch tunnels that the precedent and measuring data is insufficient existing support pattern blasting plan and interpretation of separate way concerning specific terrain and rock quality. In this study, behavior according to load distribution ratio and Unsymmetrical Pressure about standard support pattern which is applied in design and construction of 2-arch tunnels was analysed and the examination of blasting vibration has influence on the center wall is conducted as a consequence reasonableness of support whether or not with presumed support pressure and ground reaction curve method. In result appropriateness of standard support pattern, support quantity is proper but considers specific terrain and rock quality condition when design and construction of further step 2-arch tunnel standard support pattern must be decided by considering terrains, soil properties and construction condition of the objective tunnel.

• Proceedings of the KSEG Conference
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• 2002.04a
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• pp.211-218
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• 2002

TBM 터널굴진시 공법적합성을 평가하기 위한 현장조사 및 물리탐사와 세부지질조사를 수행하였다. 해당지역은 부산시 진구 가야동과 동구 수정동이며 인근 수원지인 덕정정수장에서 생산하는 수돗물을 수정산 배수지까지 확대 공급함으로서 송수공급 계통의 이원화로 안정적인 수돗물공급을 수행하기 위한 배수지터널이다. 이론적으로 굴착속도는 암반의 반발경도, 일축압축강도, 석영함량 및 각종 지질특성에 의하여 좌우되는데, 실지 시공에 있어서는 현장여건상 지질조건이나 일축압축강도등 한정된 자료들을 토대로 시공에 임할 수밖에 없다. 이러한 한계를 극복하기 위한 모형개발을 목표로 본 연구에서는 다양한 현장시험을 토대로 한 TBM 굴진 적합성을 검토하고자 하였다. 국내 시공경험상 및 지질특성만을 고려 할 때 본 과업구간의 TBM 적용성은 양호할 것으로 판단하였으나, 뚜렷한 근거에 의거하지 않은 설계는 시공단계에서 엄청난 손실을 야기하게 되므로 보다 상세한 검토를 수행하게 되었다. 본 연구에서는 TBM 공법선정의 적합성을 검토하기 각종 조사 자료들을 정리하였고, 국내시험의 한계점들을 극복하기 위한 적합한 모형개발의 필요성을 제시하고자 하였다.

• The Journal of Engineering Geology
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• v.25 no.3
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• pp.395-401
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• 2015

An investigation of the tunnel face, as well as related measurement data collected during tunneling, is necessary for rock classification and to determine tunnel stability and the cost efficiency of tunneling. However, systematic management and efficient use of such data have yet to be successfully implemented domestically, and the number of experts in this field in Korea is limited. Thus, measures to develop and implement systematic management and effective use of data and expertise are urgently needed. This study aimed to develop measures to efficiently provide online tunnel design and construction data using a building information model (BIM)-based data visualization approach, based on an integrated 3D tunnel model generation module and a web viewer module. The development technology was verified through ○○ tunnel design and construction. Directions for future study and system improvement are proposed.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 1996.03a
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• pp.83-94
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• 1996

지하 암반구조물의 안정적 설계 및 효율적 시공을 위해서는 공동설계 및 거동예측에 필요한 지질공학적 자료의 획득이 가장 중요하다. 현재 절리 등의 불연속면을 포함한 현장암반의 역학적 특성계수 및 응력 상태에 대한 조사기법들이 다양하게 개발되어 신뢰성 있는 분석결과를 제공하고 있다. (중략)

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.194-201
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• 2003

대공간 구조시스템은 일반적으로 자중을 최소화하고 부재내력의 효과적인 사용이 매우중요하다. 따라서 준공후의 외력에 대한 구조적 거동에 대한 파악도 중요하지만 시공중의 거동에 대한 파악도 매우 중요하다. 특히 케이블 막구조의 경우 시각초기에 구조물이 불안정하지만 케이블에 장력이 도입되면서 점차적으로 구조물의 강성이 높아져 구조물이 안정화를 이루게 피므로 시공과정 해석 즉 안정화 이행과정해석이 시공계획을 설정하는 부분에서 매우 중요한 요소가 된다. 본고에서는 케이블 막구조의 실례로써 최근 완공된 인천문학 경기장 지붕구조를 대상으로 시공과정과 안정화 이행과정해석에 대한 소개를 한다. 인천문학경기장 지붕구조는 케이블에 장력을 도입하는 과정에서 발생되는 변형과 내력을 흡수하고 하부구조에 대한 영향을 최소화하기 위하여 마스크 지점의 회전과 이동이 가능한 특수공법을 채택하였으며 시공과정해석(안정화이행과정해석)을 통하여 제시된 단계별 목표장력 및 변위에 따라 시공과정이 계획되고 제어되었다. 특히 외국의 기술로 설계된 자료를 근거로 일방적으로 공사를 수행한 다른 구조물과는 다르게 국내의 기술력에 바탕한 구조 해석 등을 통하여 검증하여 최종 시공방법을 결정하였고 이러한 과정을 통하여 대공간 구조에 대한 기술력을 확보하고 확인할 수 있었으며, 그 결과 향후에는 국내의 기술력으로 이와 같은 대규모의 케이블 막구조의 설계와 시공이 가능할 것이라고 판단된다.

• Journal of the Korean Geotechnical Society
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• v.35 no.8
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• pp.17-30
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• 2019

Based on pile load test results for various pile types that were constructed in-situ and pile design data of prebored PHC piles, the ratio of skin friction to total capacity (SRF) was analyzed. A SRF distribution range from the pile load test results for pilot test prebored PHC piles was 42~99% regardless of relative penetration lengths, soil types, and pile load test types. However, a SRF distribution range from the pile design data for prebored PHC piles was 20~53% regardless of relative penetration lengths and pile diameters. Also, a SRF distribution range from the restrike dynamic pile load test results for pretest working prebored PHC piles was a scattered range of 4~83% regardless of pile diameters, relative penetration lengths and soil types. The scattered SRF of pretest working piles was caused to the quality control issue on the filling of cement milk around piles and this quality control issue should be improved. The average SRF calculated by the current design method was estimated to be 2.2 times lower than the average SRF of the pilot test piles. It is because skin friction resistance is calculated at a very low level. Therefore, a new design method for skin friction will be proposed based on this study.

• The Transactions of the Korea Information Processing Society
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• v.2 no.2
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• pp.137-147
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• 1995

In the construction project, the design and the construction have been divided strictly. Because the design files of CAD library cannot be used directly in project quantity survey, we depend on manual handling.. It's because there has no interface between the system of the design and that of the construction. In this paper, by using the sizes and quantites of project design, we construct database model for automation of project quantity survey, and analyze the interface among the structure design files stored in design library of CAD system and the information of quantity survey, build a system which can survey the project quantity efficiently and evalulate the performance of this system.

• Journal of the Korea Institute of Building Construction
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• v.17 no.5
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• pp.453-463
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• 2017

Due to the increase in the size of buildings and scale, the importance of construction engineering that reflects the constructability from the design stage of the project is increasing. Especially, engineering efforts related to facilities, equipment and construction methods for temporary work at the design stage can significantly contribute to improvement of constructability and project performance. The purpose of this study is to derive construction engineering tasks on temporary work at the design phase of the high-rise building projects. 27 preliminary tasks were firstly investigated through literature review and experts' group interview, and the necessity and importance analysis of each tasks were then performed based on questionnaire survey. Most of the tasks related to plans on structural framework and lifting equipment were analyzed as relatively more important ones. Lastly, 21 engineering tasks, which are classified into 5 factors, were proposed through factor analysis. The factors were determined as 1) structural framework, measurement and circulation, 2) lifting equipment and pumping, 3) space zoning, 4) water supply, 5) temporary facility, electric power supply and lighting. The results of this study can be used as basic data for establishing efficient work process of construction engineering on temporary work at the design phase.