• Journal of the Korea Institute of Building Construction
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• v.14 no.6
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• pp.551-559
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• 2014

Fast-tracking was developed as an optimizing method to shorten the duration of construction project in 1960's, and it introduced to Korea in 1999. Since then, many Korean companies have been used fast-tracking for getting economical benefit from shorten duration. However, there were some problems(dispute, delay and cost overrun) because of using inappropriate subcontractor management system. For this reason, previous studies suggested some management models to solve these problems. Unfortunately, however, the models have been had some doubts about reliability, objectivity and possibility of using them on real construction site. Therefore, this study suggests 3 steps of strategic subcontracting method and apply it on real fast-tracking practice(L company) to secure reliability and objectivity. Through this, the method is expected to make up the doubts of previous studies.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.38 no.10
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• pp.5-11
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• 2009

본 내용은 당사가 Turn-key방식으로 설계시공일괄입찰방식으로 시공후 현재 운영중인 C시 광역소각시설의 설계 시공 및 운영을 중심으로 개요와 특징에 대해서 소개하고자 한다. 본 프로젝트는 현재 시공이 완료되어 정상가동중에 있으며 사업의 배경 및 목적 개요, 그리고 이 프로젝트에서 국내 최초 적용한 병행류식 스토커 타입 소각로 및 처리프로세스를 소개하고자 한다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.210-211
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• 2013

The purpose of this research is to perform a case study for verifying problems of BIM application to the building construction project using Fast Track method. The object of case study is an actual construction project completed in 2013. As a result, some problems and solutions for those were extracted. The result of this study will contribute revitalization to the BIM application in the project using Fast Track method.

• Journal of Korean Tunnelling and Underground Space Association
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• v.17 no.4
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• pp.499-511
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• 2015

A room-and-pillar underground structure is characterized by its grid-type array of galleries. As a result, its construction and economical efficiency can be governed by excavation sequence of galleries. Therefore, this study aims to study the optimum excavation scheme of a room-and-pillar underground structure by considering its various design factors such as ground conditions and excavation sequences. Drill-and-blast method is assumed as a excavation method for a room-and-pillar underground structure. In addition, two kinds of excavation patterns corresponding to a concurrent and a sequential excavation patterns are considered in this study. For the assumed conditions, the structural stability and the construction efficiency based on the number of faces and the travel distance of a jumbo drilling machine are analyzed for the two excavation patterns. Even though the two kinds of excavation patterns show almost the same structural stability as each other, the concurrent excavation pattern is relatively preferable to the sequential excavation pattern in terms of the number of faces in operation and travel distance of a drilling jumbo.

• Journal of Korean Association for Spatial Structures
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• v.7 no.2 s.24
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• pp.97-104
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• 2007

Recently, the demand of the large span structures has been increasing. The large span structures include such a large scaled structures such as: the shell structure, the space frame structure, the membrane structure and the cable structure, etc. The large span structures are supposed to be confirmed and issued carefully at the initial process of the design besides the construction engineering aspects because of the structural specific cause that should solve and accomodate those large and wide space without columns. In the field of the large span structure construction, the erection construction method has been regarded as a major affected aspects on the construction cost, construction term, and stability. In the field of the large span structure construction, there are various construction method and system could be applied depends on the condition of the construction site and other circumstances such a major construction method as: the element method, the block method, the sliding method, the lift-up method and complexed method, etc. In this study, as the case study of the erection construction method of the large span structures, after survey and study that those existing large span structures construction cases which had applied and adopted the election construction method and analysis and classify into the Uoups by the size, span, ceiling height, structural system in odor to supply and suggest the data for the enhancement and development in the field of the erection construction method as a efficient structural solution of the large span structure construction.

• Journal of the Korean Geosynthetics Society
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• v.22 no.1
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• pp.9-23
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• 2023

In this study, the design methods of self-supported retaining wall with cement treated soil constructed by vertical mixing method (trencher mixing method, V-DCM), which are using in domestic and foreign field, are investigated, and the characteristics of it are presented with comparing the results of numerical analysis with the drainage and construction conditions. The results indicated that the method 1 (total stress analysis) is the most aggressive, and method 2 (effective stress analysis) and method 3 are similar in the internal stress, and the stress and the horizontal displacement are effected on the soil type and drainage conditions in backfill of the wall. Also, in the case of the design combined with numerical analysis the method 1 can be applied, in that of the traditional design without the analysis the method 2 or the method 3 can be used. Finally, if the numerical analysis is only conduct, the tensile stress in excavation base and in boundary of the wall and the original ground have to be considered in the numerical analysis method.

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