• Journal of the Korean Geotechnical Society
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• v.17 no.5
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• pp.181-196
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• 2001

지하구조물에 있어서 누수사고의 빈번한 발생 및 상습화 경향에도 불구하고 현재 국내에서 사용되고 있는 누수보수방법은 누수유형에 관계없이 일괄적으로 동일한 처리방식으로 보수하는 상황으로서 지하구조물 누수에 대하여 누수 유형별로 보수방법을 달리하는 적극적인 해결방안의 모색이 필요하다. 따라서, 본 연구에서는 지하구조물의 누수보수에 있어서 방수 그라우트재의 공학적 특성을 파악하고 현장상황에 적합한 방수그라우팅 기법을 수립하여 누수유형별로 적용한 사례를 중심으로 적용성을 고찰하였다. 방수그라우팅 적용사례를 분석한 결과 지하구조물의 누수방지를 위하여 누수상황 및 누수유형에 따라 주입재의 배합비를 적절히 변화시켜 주입재와 현장상황에 적합한 방수그라우팅 기법을 병행 적용하는 것이 확실한 방수효과를 얻을 수 있으며, 주입목표구간에 대해 단계적으로 수회로 나누어 순차적인 그라우팅과 가능한 한 저압, 소량, 장시간에 걸쳐 주입하는 것이 방수그라우팅 효과를 증대시킬 수 있는 것으로 판단된다. 또한, 현장 적용결과로부터 기존 방수이론의 영향요소에 추가하여 물시멘트비, 주입재의 입경, 주입시간 및 주입량, 혼화재 사용여부, 주입차수 등에 대한 다양한 영향요소의 검토가 필요한 것으로 판단된다.

• Journal of Korean Tunnelling and Underground Space Association
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• v.7 no.2
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• pp.153-163
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• 2005

This paper presents two case studies for tunnelling in Bangkok: a subway tunnel site and a flood diversion tunnel site. The first case study is related to ground displacement response for dual tunnel Bangkok MRT subway. The MRT subway project of Bangkok city consists of dual tunnels about 20 km long with 18 subway stations. The tunnels are seated in the firm first stiff silty clay layer between 15-22 m in depth below ground surface. The behavior of ground deformation response based on instrumentation is presented. The back analysis based on plain strain FEM analysis is also presented and agrees with field performance. The shear strain of FEM analysis is in the range of 0.1-1% and in accordance with the results of self boring pressuremeter tests. Meanwhile, the second case study is related to the EPB tunnelling bored underneath through underground obstruction. The Premprachakorn flood diversion tunnel is the shortcut tunnel to divert the flood water in rainy season into the Choapraya river. The tunnel was bored by means of EPB shield tunnelling in very stiff silty clay layer at about 20-24 m in depth. During flood diversion tunnel bored underneath the existing Bangkok main water supply tunnel and pile foundation of the bridge, instrumentation was monitored and compared with predicted FEM analysis. The prevention risk potential by means of predicting damage assessment is also presented and discussed.

• Water for future
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• v.53 no.12
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• pp.58-63
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• 2020

• Proceedings of the Safety Management and Science Conference
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• 2012.04a
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• pp.181-188
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• 2012

본 연구는 Supply Chain Process 측면에서 MFCA를 활용할 수 있는 방안으로 현장의 7대 낭비 요소를 물류 기능에 접목하여 MFCA를 도입할 수 있는 요소들을 알아보고 다양한 연구 사례를 들어 도입 가능성을 검토하였다. 7대 현장 낭비인 과잉 생산, 대기, 운반, 가공, 재고, 동작, 불량의 낭비에 물류 기능으로 정의된 저장, 하역, 운송, 포장, 정보, 유통가공 등의 측면을 대상으로 각 기능에 적용가능한 요소들을 재정립하고, GCM(Green Chain Management) 측면에서 여러 사례들을 조사하여 물류 분야에서 $CO_2$를 저감할 수 있는 방안들을 사례로 제시하였다. 이를 통해 낭비에 대한 층별화, 가시화, 효율화 접근이 가능하며 실질적 성과를 창출하여 제조원가의 경쟁력을 확보할 수 있으며, 공해 및 폐기물 저감을 통한 환경 보전에 기여할 수 있을 것으로 기대된다.

• Journal of Korean Institute of Fire Investigation
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• v.11 no.1
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• pp.91-109
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• 2007

조립식 건축물의 화재는 건축자재의 종류에 따라 다양한 화재 특징을 나타내게 되는데 금번 연구과제로 선정한 화재는 지난 2006년 12월에 발생한 조립식 샌드위치패널 숙소 화재사례로서 이번 연구를 통해 조립식 샌드위치패널 건축물의 화재원인분석과 감식방법을 고찰해 보고 아울러 발표된 연구논문자료와 실제 화재재현실험을 통한 감식능력 향상을 도모하고자 한다.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.125-126
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• 2012

최근 몇 년 사이 공사현장의 미관 개선을 위하여 단순 기능적인 요소로 인식되었던 공사장 펜스에 공공디자인을 통한 환경그래픽을 적용 하는 사례가 빈번해지고 있다. 따라서 본 연구는 2010년 동서대 퍼블릭디자인 앤 라이팅연구소가 싱가포르 도시철도 공사현장의 펜스에 적용한 디자인프로젝트에 관한 연구이다.

• Journal of the Korea Institute of Construction Safety
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• v.2 no.2
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• pp.50-55
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• 2019

Currently, safety management is becoming important at domestic construction sites. Despite the importance of safety management, accidents at construction sites are steadily increasing. Fire accidents among safety accidents cause not only negative effects on schedule delay or work plans at construction sites, but also huge casualties. Therefore, the purpose of this research is to extract the causes of fire at the construction site through the case of fire at the construction site, and to prioritize prevention through the analysis of the factors to contribute to the prevention of fire. As a research method, we select fire factors through case, conduct surveys through expert group, and analyze survey through AHP technique. The results of the AHP analysis of the survey of expert groups showed that the workers and their sub-item ranked high. Therefore, the priority for fire prevention was given, and this research is believed to help prevent fire.

• Journal of Practical Engineering Education
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• v.12 no.1
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• pp.93-100
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• 2020

To qualitative improvement in addition to the quantitative growth of field placement, efforts to reduce short-term (4 weeks) and mid-term professional practice (8 weeks) and to increase the proportion of long-term term professional practice (12 weeks or more) are increasing at university sites. There are the problems: the absence of systematic and specialized field placement curriculum of the short-term and mid-term professional practice, the participation of university field placement increases, companies do not prefer to participate in its program and students hesitate to apply to long-term practice due to their major. In order to solve these problems, this paper proposes the IPBP(Industry Problem Based professional Practice) based on Gyeongbuk K University which the students solve the company's difficulties during the field placement with their professor if need. In order to build a win-win field practice culture with participating companies, we suggest that the IPBP solution field practice presented in this paper is one of the good models.

• The Journal of Engineering Geology
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• v.24 no.1
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• pp.81-89
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• 2014

Stress measurements of shotcrete lining were performed to evaluate the stability of the primary lining and to determine the thickness and the construction timing of the secondary lining. The current situation of stress measurements of shotcrete and problems related to judging the safety of shotcrete linings are presented, based on the results of several case studies. An improved method of performing stress measurements on shotcrete lining is also presented. In evaluating the safety of shotcrete lining, the use of absolute values of measured stresses would improve the reliability of the measurements.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.23 no.1
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• pp.113-129
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• 2012

This study focuses on two analysis: direct cognition of effectiveness of internship practicum, difference of career attitude maturity. The purpose of this experimental case study is to find out the practical problems of Internship education as a field-study of LIS by applying Job-Shadowing Internship methods. The results reveal that 71% of interns responded the positive effects of Job-Shadowing, but the effects to the career attitude maturity was not statistically significant. The implications of the case study are as follows; (1) systematic pre-instruction and orientation from the department are the critical factor of internship, (2) practicum guidelines(PEP), which is provided by the person in charge of tasks in internship institutions is the another important factor, and finally, (3) tools for measuring the effectiveness of internship is required for LIS practicum major course development.