• 한국지반공학회논문집
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• 제31권3호
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• pp.39-50
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• 2015

터널 내 콘크리트 라이닝 및 공동구에는 일반적으로 구조물의 형상 및 강성이 변화하는 위치, 부등침하의 우려가 있는 위치, 온도변화가 심한 곳 등에 신축이음을 설치하여 균열발생을 최소화시키고 있다. 하지만, 설치되는 신축이음의 소요간격은 터널내의 온도변화, 구조물의 시공 및 환경조건, 구조물과 배면지반과의 인터라킹 등에 의해서 영향을 받아 그 간격을 정량적으로 제시하기에는 한계가 있다. 그럼에도 불구하고 고속도로 전문시방서(Korea Expressway Corporation, 2012)나 도로설계편람(Ministry of Land, Transport and Maritime Affairs, 2010)에 의하면 콘크리트 라이닝의 신축이음은 터널 입출구부 50m 이내에서는 25m 이하 간격으로 터널 내부에서는 20-60m 간격으로 일률적으로 설치하도록 되어 있어(공동구는 별도기준이 없어 라이닝 기준 준용) 터널건설과 관련하여 여러 가지 시공 및 경제적 문제점을 야기하고 있다. 따라서 본 연구에서는 이와 같은 문제점을 해소하기 위하여 신축이음 관련 국내 외 설계기준 및 시방서 기준들을 분석함과 더불어 터널내의 신축이음 관련 현장시험시공과 이론 및 수치해석적 검토 등을 수행하여 터널내의 콘크리트 라이닝 및 공동구의 신축이음 설치방안에 대한 기준을 재정립하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 추계 학술논문 발표대회
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• pp.87-88
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• 2011

Construction projects that should be under the construction supervision regulation were decreased in 2008 and new supervision projects in 2010 were significantly reduced by 60% comparing to the ones as of 2009. On the contrast, the volume of world construction projects including Middle·South Asia and Africa is forecasting to be increased by 46% in 2018. However, although the needs of oversea expansion of domestic construction supervision firms are appeared more and more, their preparations to the strategically important areas in the world are insufficient. Thus, this paper aims to suggest directions of strategics and plans for domestic construction supervision industry to expand the market to the world through questionnaire surveys and expert investigation.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.51-56
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• 2005

It does not find for solution by limitation of technological mechanism of existent of leakage maintenance material. So, it is paid for huge expense because continuous repeat maintenance work is consisting. Furthermore, it is indicated by big problem in construction work that is constructed by field experience that thing by definite and systematic theory is not with proper performance test and analysis up to now. Therefore, wish to measure physical performance change by various environment condition maintenance of structure and performance construction work aspect in that apply to water leakage maintenance material using of acrylic resin system water expansion, leakage maintenance material in this research, and present suitable form of construction work under these environment. also, wish to ready diversified remedy by oversea market opening.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 추계 학술논문 발표대회
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• pp.85-88
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• 2008

As super-high-strength concrete uses a large amount of binder, there is an autogenous shrinkage strain larger than dry shrinkage and it degrades the quality of structures. Thus, we need a technology to minimize the shrinkage strain of super-high-strength concrete. Accordingly, the present study prepared super-high-strength concrete with design strength of over 100MPa and, using an embedded gauge, measured the shrinkage strain of free shrinkage specimens for super-high-strength concrete containing expansion agent. According to the results of this study, the expansion rate of concrete increased in the early stage due to the admixture of expansion agent, but the shrinkage rate went down with the lapse of time. The effect of the admixture of expansion agent on compressive strength appeared insignificant. Further research shall be made on different kinds of expansion agents and various mixture ratios for basic analysis to reduce autogenous shrinkage of super-high-strength concrete.

• 한국안전학회지
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• 제19권1호
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• pp.108-116
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• 2004

After the IMF financial crisis, a lot of risks in construction industry have been increased gradually with the expansion of construction industry widely, higher stories of building, and the expansion of the underground space and excavation work. These risks are bringing out construction accidents such as the death, the injury of worker and so on, not so much as it would be effected the corporation's image. In spite of these situations, many construction industries still maintain the wrong methods and not try to decrease construction accidents. Recently, we should focus on the fact that management system of the larger construction also is being good, on the other hand, the condition of the work in the case of smaller construction industries is very poor, construction company have a particular safety management system but it has a difference according to the construction magnitude, construction companies have a particular safety management system but it has a difference depending on the construction according to the construction magnitude. Therefore, this study will suggest the developed way of construction safety management by the comparison and analysis from the difference between the higher and the smaller construction industries.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 추계 학술논문 발표대회
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• pp.79-83
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• 2005

In the reinforced concrete structure, Even if speak that water leakage occurrence is no problem to material, there is a lot of reasons construction factor, material damage by behavior structure, properties of matter change by years and water leakage part by environment condition. so, waterproofing technological consideration should be gone ahead. In this research, we will study about stick performance, concrete surface adhesive, damage and blow. we will check all things and test it. The stick expansion type complex of flexible material passed on result of standard. It is conducive to concrete of durability by waterproofing layer performance demobilitation technology on the water leakage structure for solution of problem and repair

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.953-956
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• 2006

Sulfate resistance of mortar specimens with or without alkali-free accelerator exposed to sulfate solutions for 360 days was investigated. Test results confirms a negative effect of alkali-free accelerator on the sulfate deterioration, irrespective of attacking sources. Based on the ASTM C1012 expansion test, the experimental findings demonstrated that higher $C_3A$ content in cement led to the higher expansion, especially in the mortar specimens with alkali-free accelerator.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.135-136
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• 2023

The Vocational Rehabilitation Center Expansion Project, with a budget of 15.3 billion KRW, transformed an existing facility into a more eco-friendly, user-friendly, and publicly accessible space. The project involved expanding the building from a basement and two above-ground floors to a basement and six above-ground floors, addressing the shortage of facilities for people with disabilities while promoting eco-friendliness. Design concepts included eco-friendly MASS, improvements to the existing building, social adaptability, and user-centric evacuation measures. Value Engineering (VE) and technical reviews led to proposals for cost reduction and functionality enhancement. Completed in September 2019, the project, renamed "Se-um Center," now hosts seven disability welfare facilities, serving as a vital infrastructure improving the lives of individuals with disabilities in the local community.

• 정보보호학회논문지
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• 제14권2호
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• pp.57-68
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• 2004

본 논문에서는 UOWHF의 도메인을 확장하기 위한 새로운 병렬 처리 알고리즘을 제안한다. 제시되는 알고리즘은 non-complete l-ary tree 에 기반을 두고 있으며 현재까지 최적의 키 길이를 가진 유일한 알고리즘인 Shoup 의 알고리즘과 동일한 최적의 키 길이를 가진다. 또한 Sarkar의 결과를 이용하여 본 논문에서 제시되는 알고리즘이 Shoup의 알고리즘과 함께 Sarkar가 제시한 도메인 확장 알고리즘들의 커다란 집합 중에서 가장 최적화된 키 길이를 가짐을 증명한다. 그러나 제안 알고리즘의 병렬처리능력은 complete tree에 기반 한 구성 방법들 보다 약간 비효율적이다. 그러나 만약 l이 점점 커진다면 알고리즘의 병렬처리능력도 complete tree 에 기반 한 방법들에 가까워진다.

• 한국건설관리학회논문집
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• 제7권4호
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• pp.109-117
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• 2006

외환위기 이후 서서히 회복하던 국내 건설시장은 정부의 지속적인 부동산 규제 정책으로 최근 들어 급속히 위축되어 가고 있다. 반면 해외건설시장은 세계경제의 성장과 더불어 WTO(World Trade Organization)체제 출범이후 시장개방이 가속화되어 지속적인 성장을 하고 있고, 또한 최근의 고유가로 인한 중동을 중심으로 한 산유국들의 발주량 증가는 국내건설업체들에게 해외 진출의 좋은 기회가 되고 있다. 그러나 우리나라 건설업체들은 해외시장에서 선진국의 기술력과 중국 등 후발국의 추격으로 입지가 줄어들고 있는 실정이다. 이 연구에서는 1970년대부터 지금까지 우리나라 해외건설 수주실적 자료를 분석하여 우리나라 건설산업이 지나온 흔적들을 하나씩 살펴보고, 분석한 결과를 바탕으로 우리나라 건설업체들의 문제점들을 찾아보고자 한다. 이를 통해 나타난 현재 우리나라 해외건설시장의 문제점들에 대한 해결방안을 제시함으로써 향후 해외건설시장 확대에 도움이 되는 분석적인 자료를 제공하고자 한다.