• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.12 no.1
• /
• pp.107-113
• /
• 1992

This paper is the part of fundamental study considering whether the unprocessed water cooled blastfurnace slag, by-product of iron works, can be useful for some fine aggregate of mortar and concrete. The acquired results in this study show that the qualities of the water cooled blastfurnace slag produced in the state of raw material in the country in not good for using as a fine aggregate of mortar and concrete. To be used as a fine aggregate of concrete the qualities need to be improved in the process of manufacture.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2010.04a
• /
• pp.521-524
• /
• 2010

현재 국내에서는 상품 생산을 위한 각 공정의 업무를 통합관리 해 줄 수 있는 PLM(Product Life-cycle Management)시스템을 건설업에 도입하려는 움직임이 있으며 실제 건설 구조물에 대한 통합환경 시스템인 CPLM(Construction Product Lifecycle Management) 관련 연구를 진행 중에 있다. 통합 시스템 내에서 건설 구조물 생산을 위한 각 업무분야에서는 시스템이 추구하는 업무진행의 흐름에 맞추어 작업을 수행 할 수 있도록 하는 각자의 프로세스를 개발해야 한다. 이 연구에서는 토목구조물을 대상으로 협업환경 내에서 활용 가능한 3D 정보모델인 BIM기반의 해석 및 설계 프로세스를 구축하고 국내외 토목건설산업 분야에서 차세대 설계프로세스로 유력한 BIM기반의 구조해석 및 설계 프로세스의 실용화를 위한 기초자료를 제공함을 목적으로 하며 해석 및 설계 대상 구조물로 아치교량을 선정하여 연구를 진행하였다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2016.05a
• /
• pp.309-314
• /
• 2016

본 연구에서는 확률강우량 산정을 위한 빈도해석 시 보다 타당하고, 신뢰도 높은 강우자료를 선정하여 수공구조물 설계 및 재난방재계획에 합리적인 기준을 제시하고자 이상치 적용에 따른 확률강우량을 산정 비교하였다. 이상치검정의 비교를 위하여 Grubbs and Beck 방법과 미국 수자원평의회 방법을 적용하였으며, 적용결과에 따라 강우자료를 조정하여 확률강우량을 산정 비교하여 타당성을 검토하였다. 본 연구의 수행으로 이상치검정에 따라 강우자료 년수에 변화가 있었으며, 기존의 방법과 확률강우량을 비교하였을 때, 증감이 나타났다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2021.06a
• /
• pp.160-160
• /
• 2021

과거 대규모 댐 건설 등 물 개발 중심에서 벗어나 효율적이고, 균형 잡힌 물관리 중심으로 '물관리 패러다임'이 변화되고 있다. 물관리 일부인 수질은 생활하수, 산업폐수, 농·축산 폐수에 의해 하천 및 호소 오염의 심각성이 대두되어, 수질 개선에 관한 연구가 진행되고 있다. 한강 유역은 한강, 남한강, 북한강 등 여러 수계로 구성되어 있으며, 서울을 포함한 주요 도시지역을 포함하고 있다. 한강 유역은 도시 및 농촌지역이 혼재되어 있으며, 도시지역의 경우 수변구역이 주민생활과 밀접한 유역이 많다. 한강대권역관리계획, 지자체별 총량제도를 통하여 관리를 하고 있으나, 각각의 유역별 특성이 다양하여 여러 이슈와 환경적 문제점이 발생하고 있어 유역에 적합한 수질개선 방안이 필요한 실정이다. 국내에서는 수질오염총량제도를 통해 수계의 수질을 관리하고 있지만, 오염물질의 부하량을 기준으로 수립하여 데이터의 다양성을 나타내기에 한계가 있다. 본 연구에서는 하천의 수계를 단위유역 단위가 아닌 중권역 단위로 구분하여 수질 인자의 농도를 활용하여 인자 간의 관계가 하천에 주는 영향을 보고자 한다. 수질 측정망에서 수집된 수질 데이터를 활용하여 여러 기법의 데이터 분석을 통해 한강 유역 수질의 특성과 경향을 시각화 그래프로 나타낸 결과를 토대로 유역특성을 반영한 수질 개선방안을 도출하고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.39 no.5
• /
• pp.657-665
• /
• 2019

The domestic railway parts and equipment manufacturing industry is mainly focused on SMEs, and the majority of them are suffering from profitability because they cannot build economies of scale. Besides, they have survived in the form of importing technology products from overseas advanced countries and delivering them to domestic railway operators rather than having in-house technology. Therefore it is necessary to study whether the problems of the current railway industry can be identified and improved and at the same time, whether the government's railway industry development policy is properly reflected. literature studies related to technology commercialization, and conduct surveys of AHP questionnaires on the experts of the manufacturing industry of SMEs, academics / research institutes of the railway industry. After that, the Level 3 activation method AHP analysis was additionally performed on the important factors of Level 2 that have the highest importance and priority in Level 1. As a result of the AHP analysis, 'Technical Connectivity' was the most important method in the technical factor, and SME experts and academic and research institute experts were highly evaluated for 'commercialization ability' Competence in terms of importance. As for external support factors, it was analyzed that SME experts "support for manpower development" was important, while the other two group experts research and development support was important. In this study, the priority of the government support and policy priorities are suggested according to the capabilities of the railway manufacturing SMEs before the future R&D support.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.33 no.6
• /
• pp.2583-2591
• /
• 2013

A number of cities have been constantly decreasing their residents by the low quality of life and environment. A creative industry is being noticed for not only securing the competitiveness of the city but also increasing the number of population. Thus, the urban structure for inducing creative industry population becomes to major issue to the most of local governments. This study aims to suggest the relationships between urban structure and creative industry population based on different urban sizes. To measure the population of creative industry, this study used the 'National Business Survey' by the National Statistical Office, which classified the statistical data of industrial places on a basis of city, district, and borough. Based on the results of expert questionnaire surveys, it conducted an analysis on the importance of urban structure and drew some critical factors that have an important effect on attracting the population of creative industry. The relationships between creative industry population and urban structure evaluated by multiple regression analysis. This study found out that the cultural factors like cultural space or culture events were drawn as very significant factors that have a positive effect on the population of creative industry population. It is judged that the creation of culture environment, which can enrich the creative industry, is needed to strengthen the competitiveness of the cities.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.28 no.5D
• /
• pp.695-703
• /
• 2008

China water market has huge potential for increased use of BOT mode and one of the most attractive markets of doing business. However, the current China water BOT market shows that many foreign companies are retreating from the market while Chinese water companies fast growing. From the view no domestic companies have track records in China BOT water market, the research identified twenty market access barriers in terms of construction laws, regulations, BOT-related policy and the recent market situation. These are evaluated based on interview results with 10 professionals direct or indirect having a China water BOT experience. All the factors are found to be highly influential to foreign company's decision on the market participation. Among those, no fixed return policy and low water price, difficulty in water price adjustment and approval, and no government guarantees, all directly related to the project viability and under the control of government, were the most critical factors, implying government's role is the key in increasing the market competition by attracting more foreign participation on the market. In addition, new construction law regulating foreign EPC contractor's construction work, namely Decree 113, and requirement of applying competitive bidding in selecting EPC contractor in a BOT project are also considered signigicant barriers on foreign participation, which contradicts international norm and therefore necessitates an adjustment on current decision process in domestic companies.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.3D
• /
• pp.231-237
• /
• 2012

The interrelation of integrity degree and country competitive power was known as high. But, according to the CPI announcement of Transparency International, the domestic Corruption Perceptions Index ranked 5 points, as being corrupt. It was investigated that the corruption level of Korea was getting worse most in the construction sector. In this way, it is emergent and inevitable to improve the transparency in the construction industry, accounting for 25-54% of the total corruption cases in our society. Transparency International has opened to the public the source data, utilized in the CPI measures in 2010. In the case of Korea, the 9 data of 6 organizations were utilized. According to the PERC, the corruption level of the private sector in Korea has been estimated as the worst among the 16 countries. In this context, this paper analyses the corruption level of Korea by utilizing the source data of the Transparency International CPI. And it aims to comprehend structural problems in the construction industry and to suggest implicative countermeasures through out the anti-corruption activities in the world. It propose finally an improvement of the structural causes in the construction industry, a promotion of effective punishment against corrupt practices, a reinforcement of the transparency management in the construction sector, etc.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.26 no.6D
• /
• pp.969-974
• /
• 2006

Labor shortages are a serious problem for Korea's construction industry. The problem is both quantitative and qualitative. There is a shortage in supply as due to a decrease in the influx of new labor, and existing workers are less productive as they age. The problem will only get worse as more and more major public projects are being planned. Options for increasing the labor supply are somewhat limited, and thus efforts need to be made to adopt new technologies that can improve the productivity and efficiency of field work and their processes. This paper introduces seven innovation technologies that have the best potential to increase productivity and thus reduce the burden of labor shortage problems. These include 1) Substitution by use of robotics and automation, 2) development and applications of Innovative materials to reduce on site field work, 3) increase in productivity through the implementation of Information Technology, 4) improved productivity through the application of modules, and prefabrication, 5) prevention of rework and redesign, 6) diversification of labor by integrating labor skills, and 7) improved productivity by standardizing site processes.

• Journal of the Korean Geotechnical Society
• /
• v.24 no.8
• /
• pp.61-79
• /
• 2008

Consolidation settlements on marine dredged clays are often greatly and potentially damaging to structures. Currently, large-scale projects are in planning or progressing in Korea. These projects have been performed on thick and soft clay layers. So, the evaluation of consolidation characteristics for dredged and reclaimed ground is very important in design and construction. Therefore, in this study, a series of conventional consolidation tests were performed to investigate the consolidation characteristics of marine dredged clays near Gwang-yang Port. Preconsolidation pressures were evaluated by applying previously proposed 8 methods for the conventional tests results in order to evaluate the legitimacy of these methods. In these methods, when estimating maximum past pressures for dredged and reclaimed ground, it was proved that Becker (1987), Silva (1970), Sridharan (1991)'s methods are excellent in legitimacy.