• Journal of Korean Tunnelling and Underground Space Association
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• v.7 no.1
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• pp.73-88
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• 2005

Three approaches presently used for the design of underground structures in rock mass are quantitative rock mass classification system, classification systems based on the behavior of the rock mass during excavation and general qualitative procedures for the design process. In this study their characteristics and shortcomings are discussed, and Austrian guideline for tunnel design/construction, that was proposed to solve the problems with these methods, are introduced and compared. For technically sound and economic tunnel construction, a flexible design and construction procedure is needed to cope with uncertain ground and boundary condition, and also actual ground condition should be predicted through feedback of geotechnical information obtained during construction.

• Fire Science and Engineering
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• v.25 no.4
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• pp.22-27
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• 2011

Fire resistance ceiling system is the structure of which the ceiling installed under the slave of the structure has the fire resistance performance. Because of having the fire resistance performance, fire resistive coatings on steel beams can be reduced and large span structures can be constructed. So, it have advantages of convenience for construction, shorten for construction time and cost reducing. In foreign country, it is general that one system consisting of slave and ceiling is constructed as a fire resistance system. But in Korea, there are no fire resistance ceiling systems thus economical efficiency due to being high-rise and light-weight of structures is not secured. Therefore research and development of nominal fire resistance ceiling systems is necessary. On this study, fire resistances of standard non-loadbearing ceiling systems were assessed and basic informations for developing the fire resistance non-loadbearing ceiling systems were presented.

• Journal of the Korea Institute of Building Construction
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• v.19 no.3
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• pp.247-254
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• 2019

The number of construction accident deaths in Korea is increasing and most causes of construction accidents are human factors. Voluntary participation of construction workers in safety activities is likely to improve these human factors and increase the prevention effect of construction accidents. Therefore, there is a need to study the motivation of workers to meet the voluntary participation of construction workers. In this respect, the purpose of this study is to compare the importance of construction field engineers and construction managers about the safety motivation factors of construction workers. This study analyzed the results of the questionnaire survey about safety motivation factors and conducted a T-test for these factors. The results of this study can be used as managing method to effective on-site safety management by minimizing the difference between the two groups according to motivation factors of construction workers.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.27 no.5
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• pp.403-412
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• 2014

This paper presents special-purpose design program and plastic design results for hollow RC bridge columns with reinforcement details for material quantity reduction. The developed reinforcement details has economic feasibility and rationality and makes construction periods shorter. This study documents the economic evaluation of hollow reinforced concrete bridge column systems with reinforcement details for material quantity reduction and presents conclusions based on the application findings. As a result, the proposed reinforcement details for material quantity reduction were designed prior to the existing reinforcement details in terms of structural rationality, constructability, and economic.

• 월간 기계설비
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• no.11 s.220
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• pp.86-88
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• 2008

초고층건물은 랜드마크로서 그 도시를 대표해 정치, 경제, 사회적으로 엄청난 파급효과 창출이 입증되면서 세계 유수 도시가 경쟁적으로 추진하고 있다. 대전광역시와 충청남도는 대전 충남을 상징하는 초고층 건물 건립을 진행하고 있으며 현재 시공 중이거나 시공 예정인 고층 건물은 $\triangle$계룡건설 아산 배방 복합단지(51층) $\triangle$삼성 탕정 트라팰리스(39층) $\triangle$현대산업개발 I-Park(31층) $\triangle$남광토건 하우스토리(30층) 등이다. 대전 충남 지역에 건립될 고층건물에 대해 알아본다. 본지는 지난 6월 서울특별시에 이어 전국에 건설 중이거나 건설 예정인 고층건물에 대한 정보를 수록할 예정이다.

• 월간 기계설비
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• no.10 s.219
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• pp.86-88
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• 2008

고층건물은 랜드마크로서 그 도시를 대표해 정치, 경제, 사회적으로 엄청난 파급효과 창출이 입증되면서 세계 유수 도시가 경쟁적으로 추진하고 있다. 광주광역시와 전라남도는 광주·전남을 상징하는 고층 건물 건립을 진행하고 있으며 현재 시공 중이거나 시공 예정인 고층 건물은 $\Delta$금호생명 광주사옥(30층) $\Delta$대우 디오빌(24층) $\Delta$광주은행 본사(20층) 등이다. 광주·전남 지역에 건립된 고층건물에 대해 알아본다. 본지는 지난 6월 서울특별시에 이어 전국에 건설 중이거나 건설 예정인 고층건물에 대한 정보를 수록할 예정이다.

• 월간 기계설비
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• no.12 s.221
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• pp.84-86
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• 2008

초고층건물은 랜드마크로서 그 도시를 대표해 정치, 경제, 사회적으로 엄청난 파급효과 창출이 입증되면서 세계 유수 도시가 경쟁적으로 추진하고 있다. 울산광역시와 경상남도는 울산 경남을 상징하는 초고층 건물 건립을 진행하고 있으며 현재 시공 중이거나 시공 예정인 고층 건물은 $\triangle$태화강 이안 엑소디움 (54층) $\triangle$두산 위브더 제니스(48층) $\triangle$풍림 엑슬루타워(43층) $\triangle$코오롱 파크폴리스(39층) 등이다. 울산 경남 지역에 건립됐거나 건립 예정인 고층건물에 대해 알아본다. 본지는 지난 6월 서울특별시에 이어 전국에 건설 중이거나 건설 예정인 고층건물에 대한 정보를 수록할 예정이다.

• 월간 기계설비
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• s.223
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• pp.91-92
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• 2009

초고층건물은 랜드마크로서 그 도시를 대표해 정치, 경제, 사회적으로 엄청난 파급효과 창출이 입증되면서 세계 유수 도시가 경쟁적으로 추진하고 있다. 강원 경북 제주는 지역을 상징하는 초고층 건물 건립을 진행하고 있으며 현재 시공 중이거나 시공 예정인 고층 건물은 ${\triangle}$세계무역센터 춘천(38층) ${\triangle}$경북 현진 에버빌 엠파이어(37층) ${\triangle}$제주 월드타원(150m)등 이다. 강원 경북 제주지역에 건립됐거나 건립 예정인 고층건물에 대해 알아본다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.05a
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• pp.168-173
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• 1998

정부의 시설원예 분야에 대한 계속적인 온실 신축자금 지원으로 유리온실, 자동화비닐하우스가 약 3,800㏊('96)가 보급되어 시공. 작물재배, 경제적 측면에서 최근 시설원예에 사용되는 난방용 연료와 자재의 가격상승으로 시설재배 농가의 어려움이 매우 크나 시설원예 분야가 비약적으로 발전한 것은 부정할 수 없는 사실이다. (중략)

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.5C
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• pp.187-202
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• 2011

In this Application Study based on the result of the Basic Study, the field test was performed to compare the quality of Ready-mixed shotcrete with that of the existing field mix shotcrete, and the long-term durability was evaluated as tunnel supporting. The plant manufacturing system was also designed to produce standardization materials, and the prototype products were produced with that system. The All-in-one silo mixer was designed and the field construction system using the All-in-one silo mixer was proposed to be most effectively applied Ready-mixed Shotcrete in construction fields. And the application of Ready-mixed Shotcrete was confirmed that more superior to the field mix Shotcrete by evaluating the Constructability and Economics.