• The Safety technology
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• no.190
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• pp.18-20
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• 2013

최근 근로자들과 함께하는 자율안전관리로 유명세를 떨치고 있는 현장이 있어 업계의 주목을 받고 있다. 그 주인공은 바로 중견건설사인 (주)대건이 시공을 하고 있는 '삼척고 이전 진입도로 개설공사 현장'이다. 이곳 현장은 안전보건공단이 인정한 '위험성평가 우수사업장'으로, 임직원과 근로자들이 하나가 되어 적극적인 재해예방활동에 나서고 있다. 즉 정부가 최근 강조하고 있는 '상생 안전'을 모범적으로 실천하고 있는 것이다. 이처럼 이곳이 안전을 최우선 가치로 내세우는 배경에는 근로자의 생명을 보호하고 건강을 지키기 위함도 있지만, 가장 큰 이유는 해당 현장이 '학교'와 관련이 있기 때문이다. 만약 소홀한 안전관리와 부실공사로 인해 사고 등의 문제가 발생할 경우 소중한 미래 인적자원인 학생들에게 해가 될 것이라 판단, 안전에 각별한 주의를 기울이고 있는 것이다. 근로자는 물론 학생들의 생명과 꿈을 지키기 위해 철저하게 안전관리를 펼치고 있다는 이곳 현장을 찾아가봤다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.1322-1325
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• 2012

국토해양부는 건설공사 부실방지를 위해 시공감리제도를 도입하고 이를 민간 감리전문회사가 수행하도록 하였다. 당초 감리전문회사의 등록 관리를 국토해양부에서 처리하였으나, 2005년 서울특별시 등 16개 광역자치단체로 이관하였다. 이에 따라 행정구역을 달리하는 주소지 이전, 양수 양도 및 합병 등 광역자치단체간 상호 업무협의와 관련서류의 이관이 지연되고, 관련 정보의 분석 및 통계관리 등을 수작업으로 시행함에 따라 업무효율성이 저하되고 있는 실정이다. 이에 본 논문에서는 16개 광역자치단체에서 분산 관리하고 있는 감리전문회사 등록관리 업무를 전산화하여 통합관리할 수 있는 방안을 제시하고, 프로토타입 시스템을 개발함으로써 행정업무의 투명성 확보와 행정 편익비용을 절감하는 등 감리전문회사 등록 업무의 효율성 제고를 도모하고자 한다.

• Journal of the Korean Geosynthetics Society
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• v.17 no.1
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• pp.95-109
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• 2018

Recently, GRS (Geosynthetic Retaining Segmental) wall has been widely used as a method to replace concrete retaining wall because of its excellent structural stability and economic efficiency. It has been variously applied for foundation, slope, road as well as retaining wall. The GRS wall system, however, has a weak point that is serious crack of wall due to stress concentration at curved part of it. In this study, therefore, behaviour of GRS wall according to shape of it, shich has convex and concave, are analysed and compared using Finite Element analysis as the fundamental study for design optimization. Results including lateral deflection, settlements of ground surface and wall obtained from 2D FE analysis are compared between straight and curved parts from 3D FE analysis.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.548-553
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• 2006

Activity-based productivity data can be used as an significant reference in many areas of project management such as performance evaluation and project planning. However, the existence of various factors influencing construction productivity makes it difficult to collect and analyze the productivity data. In the most of the domestic construction sites, there is no systematic method to collect and analyze the productivity data along with information on influencing factors; it is common to heavily rely on experience and intuition of field managers when dealing with construction productivity data. Therefore it is necessary to develop a management system for collecting and utilizing the productivity data as well as the factors influencing construction productivity. The main objective of this research is to define the construction productivity and its influencing factors at the activity level. In addition, methodologies on how to analyze the productivity data and to estimate productivity of future projects are proposed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.5D
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• pp.463-472
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• 2012

Exemplary contracts of construction management (CM) including highway projects have been carried out in the civil engineering area over the past ten years. However, practical and administrative challenges as transitional circumstances have been revealed in the different participants of supervision, inspection and construction management. Thus, it is important to internally overcome problems and negative perception encountered in civil engineering, and to promote the efficiencies in construction cost and quality. In addition, external efforts should be put to market opening, globalization, and technology development for competitiveness and high value industry. While it is critical to establish the concrete CM system by collaborating with various participants, proven architecture and system have not been provided because of incorrect measurement of CM accomplishment, overlap of responsibility between CM and supervision, and slow deployment in construction field. This paper analyzed the current CM practices and business environments, and presented the possible solutions for strategy improvement of CM in the owner's view point.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.473-478
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• 2007

The construction industry is huge-there are lots of project organizations and many different people who work on them. Conflict will occur in any long - term relationship and it happens in personal, professional, family, and social relationships. Disputes between parties to construction projects are of great concern to the industry. The study of construction industry disputes, and the causes of those disputes, is essential. The purpose of this study is to identify the root causes of conflicts in construction industry. A questionnaire field survey was conducted to investigate the root causes of construction conflicts. The professionals working for owner, contractor and consultants were targeted for the collection of data. Descriptive analysis such as mean score and standard deviation as well as factor analysis was employed to find underlying factors related to conflicts in construction field. Student's t-test and ANOVA test tools were used to compare the perceptions of various categories of population and project. Factor analysis was used to group the numbers of conflict causes. This study reveals four root causes of construction conflict. They are: (i) weak project leadership (ii) weak contractor selection (iii) weak project management, and (iv) project participants' attitude.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.455-458
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• 2007

With the government plan to introduce a post-sale system to the Korean real estate market quickly becoming a reality, reformation of the supervision policy under the current pre-sale system is expected. The current supervision policy, designed to enhance the quality of houses and to prevent improper construction, was reinforced through the 'residential construction promotion act' and has been further revised as the 'residential law'. At this current time, the introduction of a post-sale system is expected to affect all aspects of residential construction, from the planning stages to overall conditions regarding the actual construction. Therefore, this research will illustrate several changes in the supervision policy that are expected to arise from the introduction of the post-sale system, focusing on areas of the policy that are presumed to be the most affected. The research will highlight problems under the current system, analyze any domestic supervision restrictions that have been regulated for post-sales that are currently effective, and suggestion methods of improvement in construction supervision system through SWOT analysis.

• Journal of the Korea Institute of Building Construction
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• v.21 no.5
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• pp.469-481
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• 2021

Under Korean law, small-to-medium-sized construction projects with budgets of more than 100 million won and less than 12 billion won must receive technical guidance by a visiting technician belonging to a specialized institution. This study proposed a method for calculating the technical guidance fee to prevent the potential inadequacy of technical guidance when the responsibility providing the technical guidance fee is changed from a contractor to a client. The method simplified the construction works which should receive technical guidance into four sections according to the construction amount. For each section, the number of instances of technical guidance per day provided by the visiting technician and the minimum technical grade of the visiting technician were limited, and the guideline for estimating engineering services fees was applied to calculate the fee per instance of technical guidance. The results show that the proposed method can be applied to the establishment of a technical guidance fee guideline since it well reflects the current fee distribution and K2B analysis results.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.7
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• pp.66-71
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• 2019

In this paper, a study was conducted on the method of using GPR data to predict rebar thickness inside a facility. As shown in the cases of poor construction, such as the use of rebars below the domestic standard and the construction of reinforcement, information on rebar thickness can be found to be essential for precision safety diagnosis of structures. For this purpose, the B-scan data of GPR was obtained by gradually increasing the diameter of rebars by making specimen. Because the B-scan data of GPR is less visible, the data was converted into the heatmap image data through migration to increase the intuition of the data. In order to compare the results of application of commonly used B-scan data and heatmap data to CNN, this study extracted areas for rebars from B-scan and heatmap data respectively to build training and validation data, and applied CNN to the deployed data. As a result, better results were obtained for the heatmap data when compared with the B-scan data. This confirms that if GPR heatmap data are used, rebar thickness can be predicted with higher accuracy than when B-scan data is used, and the possibility of predicting rebar thickness inside a facility is verified.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.388-400
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• 2018

Small houses are continuously supplied after the alleviated housing act enacted in 2009. This study aimed to conduct a survey among an expert group associated with small house construction, propose problems by discovering difficulties and vulnerable points small and medium-sized construction companies experience while launching construction works as well as factors that impede the safety and housing environment of small houses. Furthermore, it ultimately intends to propose improvements. First, low-priced order is a major cause of unreasonable contract. Most companies were found to have low-priced orders in order to manage order performance. Low bidding and low-priced order are implemented to maintain construction businesses, ultimately threatening the safety environment of buildings. In addition, it is assumed that moderate bid periods and construction periods should be guaranteed. Second, work standardization for small and medium-sized companies is needed due to numerous cases that failed to meet order process. Additionally, regular instruction is required as many employees are not fully aware of relevant contents. Third, the most urgent policy direction turned out avoidance of low-priced bidding and removing insolvent enterprises from the market. Small and medium-sized construction companies that primarily build small houses undergo poor work condition. Therefore, the safety environment of small houses should be enhanced through work standardization and avoiding low-priced order.