• Journal of Korean Tunnelling and Underground Space Association
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• v.20 no.6
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• pp.931-946
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• 2018

In line with the increased usability of utility pipe conduits in urban areas, construction and R&D activities of utility tunnel, incorporated with the shield TBM method, are actively under way. The utility tunnels are installed through underground excavation, and thus are relatively weak in terms of construction safety. However, hazards associated with the utility tunnel construction have not been properly identified, despite the introduction of a policy to the 'Design for Safety' for the purpose of reducing accident rates in the construction industry. Therefore, in this study, following the derivation of hazards associated with utility tunnel, these hazards were then used as the basis to uncover key safety hazards requiring extensive management in a field, which were then used to conduct a risk assessment having applied the matrix method so that the results can be utilized in risk assessment during the stages of utility tunnel planning, design, and construction, while also serving as a data reference.

• Journal of Korean Tunnelling and Underground Space Association
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• v.10 no.2
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• pp.193-205
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• 2008

The construction of underground structures such as oil and food storage caverns are recently increasing in our country. The stability of those underground caverns are greatly influenced by their shape and size. In this study therefore, the effect that the shape of an underground cavern have on its stability were analyzed in terms of safety factor. To this end, caverns with 5 different shapes were investigated and sensitivity analyses were performed based on rock class, overburden, and lateral earth pressure coefficient. The proper amount of shotcrete and rockbolt as supports of a cavern was also assumed based on the shape and site of the cavern and rock conditions. This study is expected to be helpful in designing and evaluating the stability of caverns in future.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.10a
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• pp.45-46
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• 2011

2009년 4월에 신월성원전 건설현장의 차수벽이 파손되면서 해수가 유입되는 사고가 발생한적이 있다. 이때 주민의 요구에 따라 사업자와 주민이 참여하는 공동조사위원회가 구성되어 침수구조물에 대한 안전성을 공동으로 평가하였다. 최근에는 주민이 참여하는 지역공동협의회를 구성하여 방폐장 안전성을 확인하였고, 삼중수소 방사능에 대한 역학조사를 진행하고 있다. 본 논문에서는 경주 지역에 원자력현안 발생 시 지역주민이 해결과정에 참여하여 성공적으로 해결했던 사례를 살펴봄으로써, 현재 사회적 해결 과제로 떠오른 사용후핵연료 공론화 과정에서 고려해야 하는 시사점을 도출하고자 하였다.

• Nuclear industry
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• v.15 no.2 s.144
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• pp.36-41
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• 1995

원자력 안전관리의 중요성은 아무리 강조해도 지나치지 않는다. 원자력 재해로부터 국민과 환경을 보호하는 것이 원자력계의 지상과제임을 인식하여 안전성 확보를 원자력계 모두가 추구해야 할 공동의 목표로 정하고 `보다 더 안전`을 위하여 안전문화의 확산을 향해 나가야 할 것이다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2003.11a
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• pp.393-407
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• 2003

공동구매는 ‘가격절감’, ‘위험감소’, ‘거래비용 절감’, ‘참여의식’등의 장점을 가지고 있다. 이러한 장점은 소비자들로 하여금 구매형태에 직ㆍ간접적인 영향을 미치는 것으로 나타났다. 반면 ‘시간지연’, ‘제품다양성 부족’, ‘결제수단’, ‘상품디스플레이’등의 단점을 가지고 있다. 이러한 단점들 역시 소비자들로 하여금 구매형태에 직ㆍ간접적인 영향을 미치는 것으로 나타났으나 반면 한번 거래를 하게 되면 계속해서 거래를 한다는 의견과 앞으로도 거래를 할 생각을 가지고 있으며 주변의 다른 이들에게도 추천하겠다는 생각을 가지고 있었다. 장ㆍ단점과 관련하여 공동구매를 ‘재수용 하는가’와 ‘주변사람들에게 권유할 것인가’를 연구하였다. 본 연구의 목적은 공동구매 특성이 공동구매를 수용함에 있어서 지속적인 수용을 할 것인가와 더불어 주변의 사람들에게 권장을 하는가를 파악하는데 있다. 본 연구에 대한 자료 수집방법은 D대학교의 재학생들을 대상으로 총 100부를 설문 조사하였으며, 수집된 설문지 중에서 불성실하게 응답한 설문지 8부를 제외한 총 92부를 유효한 설문으로 확보하였다. SPSS_WIN 10.0 패키지를 이용하였으며, 대상을 통하여 제품별(종류별) 선호도와 구매시(저가격, 안전성, 배송, 시간절감, 결제편리, 기타) 우선순위를 빈도분석 하였다. 또한 요인분석통한 타당도와 신뢰도 분석하고, 연구변수로 선정한 각 요소들을 이용하여 공동구매의 특성(가격대비 성능, 편리성, 결제안전, 다양한 제품 제공)에 따라 공동구매 재수용도와 주변사람 들에게 권유할 것인가에 영향력 정도를 파악하기 위해 회귀분석을 실시하였다. 조사결과 제품 선호도의 측면에서는 서적&음반, 의류&신발, 컴퓨터&주변기기 가장 선호하는 품목으로서 전자상거래와 거의 흡사하게 나타났으며, 구매시 가장 중요하게 느끼는 요소는 저렴한 가격과 안전&안정성으로 나타났다. 또한, 공동구매 특성에 대한 요인분석 결과로는 하나의 독립요인으로 존재하지만 결재안전, 다양한 제품제공의 요인들이 편리성 요인의 하부요인으로 존재하는 것으로 나타났다. 공동구매 특성이 재수용과 주변사람 권유에 대한 결과로는 재수용적인 측면에서는 ‘가격대비 성능’과 ‘다양한 제품 제공’이 유의한 영향을 미칠 것으로 나타났으며, 주변사람 권유적인 측면에서는 ‘가격대비 성능’이 유의한 영향을 미칠 것으로 나타났고 재수용성과 다르게 ‘다양한 제품 제공’측면에서는 영향을 미치지 않는 것으로 나타났다.

• Korean Journal of Construction Engineering and Management
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• v.13 no.1
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• pp.53-66
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• 2012

Gangform compared with conventional wood and steel form is systemized form which has a capability to install and dismantle form at a time without repeating to assembly and disassembly small members. Gangform compared with ACS has some problems such as 1) Tower Crane load increase, 2) increase in safety incidence during climbing Gangform, 3) decrease in detachment operation productivity, 4) stop work due to climate impacts, and 5) decrease in labor cost, productivity, quality. A conceptual design model of automated Gangform climbing system is suggested for apartment housing construction to show its technical/economic feasibility and workers' safety while increasing operation productivity and concrete quality.

• Journal of the Korea Convergence Society
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• v.10 no.4
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• pp.25-32
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• 2019

From the viewpoint of fire-fighting activities, public building have structural and management problems in fire, so evacuation disturbance and risk of expanding combustion are high. As a result of analyzing various fire fragile factors of public building, The evaluation areas were derived from safety systems, fire-fighting facility, structure safety, general safety and the evaluation factors were presented. Also, the characteristics of domestic and foreign certification systems were analyzed by comparing and analyzing the status of fire safety performance certification system for 6 domestic and overseas apartment houses. In conclusion, the 5 convergence directions of certification system and 22 evaluation items by 4 evaluation fields were derived, and based on this, we have established 3 convergence introduction plans of fire safety performance certification system of public building.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.34 no.6
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• pp.1937-1944
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• 2014

In recent years, common ducts have been installed and operated in the sidewalls of tunnels to prepare for emergencies in tunnel construction and maintenance. The installation of common ducts is done mainly by humans. Problems with cost increases are inherent in tunnel construction by humans due to the safety risks and the economic inefficiency of humans performing construction activities. Among the problems that arise are poor illumination due to the use of temporarily installed electricity, the risk of accidents due to the confined workspaces, and workers avoiding work tasks because of the poor environment in tunnel. Ideas for solving these problems were developed using a value engineering (VE) process, and mechanized construction was identified as a promising solution. To verify the effectiveness of mechanized construction of a common duct in tunnels, experimental construction work was carried out, and mechanized construction was proven to directly improve the constructability and economic efficiency of common duct construction. In addition, reducing human involvement in common duct construction in tunnels is expected to improve safety, and because of the continuous concrete placement technique used, the finish and appearance of the ductwork are improved.

• Journal of Korean Tunnelling and Underground Space Association
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• v.11 no.2
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• pp.189-198
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• 2009

Recently the concern about the construction of underground structures such as oil and food storage caverns is increasing in Korea and abroad. The stability of those underground caverns is greatly influenced by shape factor and the size of excavation area as well as the joint conditions. In this study, therefore, the effect of the shape factor of an underground cavern on its stability was analyzed in terms of safety factor. To this end, four different shape factors of a cavern excavated in good rock conditions were investigated and sensitivity analyses were performed based on overburden, lateral earth pressure coefficient, joint spacing, properties, and orientation. The stability of a cavern is evaluated in terms of safety factor estimated numerically based on the shear strength reduction technique. In future, this study is expected to be helpful in designing and evaluating the stability of caverns excavated in discontinuous rock masses.

• Journal of Digital Contents Society
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• v.16 no.1
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• pp.79-83
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• 2015

This paper suggested a cyber collaboration platform based on web for food safety service. We implemented the cyber collaboration platform for food safety service so that the users participated in collaborative work may refer shared media objects as the same view to others. In this paper, we discussed a model for increasing reliability of food safety data through N screen server and client model. This paper explained a performance analysis of a system with function comparison running on multimedia collaboration work based on web and N screen techniques.