• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.37-40
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• 2007

As a demand for underground structure is increasing with more parking and retail spaces required. Various construction methods are reviewed and selected for each specific site for economical and fast construction. In this study, factors for selecting construction methods were categorized for substructure construction. Construction processes of substructure are consisted of methods for excavation, earth retaining systems, and placement of slabs. Factors for the selection of substructure construction method are the condition of surrounding, geotechnical, information and constraint by comfortness for others nearby. After survey for the construction data of 5 different sites, analysis about reliable substructure construction selection method was suggested.

• Journal of Construction Engineering and Project Management
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• 제6권2호
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• pp.16-23
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• 2016

The use of inappropriate procurement methods to deliver construction projects has long been acknowledged as a major source of poor project performance and is particularly problematic for the Libyan Construction Industry. Poor procurement method selection has been recognised as a major contributory factor to frequent time and cost overruns. This paper offers a way of selecting specific procurement methods to maximize successful project performance. The methodology involves an intensive review of relevant literature, followed by a semi-structured questionnaire survey. The key findings of the study reveal that 11 out of its 12 common selection criteria exhibit a significant contribution to one or more project performance criteria (time, cost and quality). Project clients should therefore prioritise these criteria when selecting a design-bid-build method. Knowledge of the criteria that contribute positively to project performance will also enable clients to work out, prior to and during construction, the best measures and provisions for successful project outcomes.

• 한국컴퓨터정보학회논문지
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• 제8권4호
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• pp.1-6
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• 2003

도로의 노선 선정은 기본적이면서도 중요한 과정이다. 하지만 노선 선정 과정은 기술적, 교통적, 환경적 요인 등을 동시에 고려해야 한다. 여러 대안노선을 검토하여 이용가치를 극대화하고 공사비를 절감할 수 있는 최적노선을 선정해야 한다. 본 연구는 도로건설공사의 기본설계단계에서 GIS와 연계될 수 있는 방법들을 분류하고 주관적 평가를 통해 합리적인 노선 선정 방안을 제시하고자 하였다.

• 한국건축시공학회지
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• 제18권5호
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• pp.489-498
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• 2018

본 연구는 대공간 지붕철골공사의 양중공법 선정을 위한 의사결정지원모델 제안을 목적으로 한다. 이를 위해 이론적 고찰 및 전문가자문을 통해 6개의 상위요인과 19개의 하위요인으로 구성된 양중공법 선정 영향요인을 도출하였다. 이후 AHP분석을 통해 요인별 상대적 중요도를 산정한 결과, 6개의 상위요인 중 현장조건(0.237), 19개의 하위요인 중 여유공지의 유무(0.118)가 양중공법 선정에 있어 가장 중요한 영향요인으로 도출되었다. 이를 바탕으로 현장관리자가 공법대안을 평가할 수 있는 방법 및 절차를 수립하고 최종적으로 현장적합도지수를 제시해줌으로써 의사결정지원모델을 구축을 완료하였다. 구축모델의 검증을 위해 대공간 현장경험자를 대상으로 사례분석을 수행한 결과, 제시된 모델이 공법선정에 있어 유용하게 활용될 수 있을 것으로 판단되었다. 본 연구의 결과는 프로젝트 초기 공법선정 과정에서 현장관리자의 의사결정을 지원하는데 활용될 것으로 기대된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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• pp.197-199
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• 2011

To utilize the Top-Down construction method, it is required to analyse building area, floors, and soil conditions to choose the three basic elements of retaining wall, base column, and floor structure. The purpose of this research is to compare the methods of Top-Down with other construction methods. The research method is to analyse the project conditions of Top-Down project cases. The aim is to develop a method of selecting alternatives, considering construction characteristics, work schedule, supporting methods, foundation types.

• 한국측량학회지
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• 제26권6호
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• pp.591-598
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• 2008

최근 정부에서는 도로의 기하구조 불량으로 인해 사고 발생률이 높은 대상지에 대해 위험도로개선사업을 추진 중에 있다. 비록, 도로의 노선을 선택하는 것이 기본적이고 중요한 과정이지만 노선 선정의 과정은 기술적, 안전적, 환경적인 요소들을 모두 고려해야 한다. 또한, 3차원 지형모델 기술은 대체 노선선정에 대한 설계와 계획에서 중요한 요소로 사용될 수 있다. 수치지도와 노선도의 조합에 의해 생성된 3차원 지형도를 조합한 실험의 경우, 주요 간선 도로 건설현장에서 다차원적인 접근 방법을 제공하기 위해 개발되었다. 3차원 수치표고 모형은 개발계획과 시공계획에 대해 설계 시공 현장에서 실시간 가상 접근을 제공하는 GIS기반으로 다양한 지표 분석을 가능하게 한다. 따라서 본 연구에서는 수치지도에 GPS측량과 토털스테이션(Total Station)측량을 이용하여 취득한 현황 측량 정보를 결합하여 노선 선정에 따른 3차원 공간 정보를 비교 검토하고 토공량 산정시 보다 정확한 양을 산정하여 도로선형개선에 활용할 수 있도록 하고, 주관적인 평가를 통하여 대체 노선에서 노선선정에 대한 합리적인 방법을 제시하고자 한다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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• pp.298-299
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• 2014

As a governmental plan for real estate revitalization, remodeling vertical extension has been permitted. Thus, the Ministry of Land, Infrastructure and Transport preannounced proclaiming the revised Housing Act and establishing the remodeling basic plan, and it is anticipated that the remodeling market will be revitalized in earnest after the enforcement of remodeling vertical extension(April 25th. 2014). As vertical extension is applicable up to 3 stories, the safety of building for remodeling is becoming important, so most remodeling construction works use various methods for structural reinforcement. In this process, the selection of structural reinforcement method has depended on structural engineer's experience and knowledge and there has been a limitation in selecting the optimum structural reinforcement method which considers remodeling project characteristics. Therefore, this study analyzed the factors to determine the kinds of structural reinforcement method in a remodeling project and suggested a process to select the best structural reinforcement method of remodeling construction.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.101-104
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• 2007

As the proportion of underground construction increases, the impact of inappropriate selection of a underground construction method for a construction size increases. The purpose of this study is to develop an objective way of selecting an excavation method. There have been several attempts to achieve the same goal using various data mining methods such as the artificial neural network, the support vector machine, and the case-based reasoning. However, they focused only on the selection of a retaining wall construction method out of six types of retaining walls. When we categorized an underground construction work into four groups and added more number of independent variables (i.e., more number of construction methods), the predictability decreased. As an alternative, we developed a decision tree by analyzing 25 earthwork cases with detailed information. We implemented the developed decision tree as a computer-supported program called Dr. underground and are still in the process of validating and revising the decision tree. This study is still in a preliminary stage and will be improved by collecting and analyzing more cases.

• Journal of Construction Engineering and Project Management
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• 제6권3호
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• pp.1-7
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• 2016

The purpose of this paper is to develop a model for selecting the best contractor in the Gaza Strip using the Artificial Neural Network (ANN). The contractor's selection methods and criteria were identified using a field survey. Fifty four engineers were asked to fill a questionnaire that covers factors related to the selection criteria of contractors practiced in Gaza Strip. The results shows that the dominant part of respondents (91%) confirmed that the current awarding method "the lowest bid price" is considered one of the major problems of the construction sector, "award the bid to the highest weight after combination of the technical and financial scores" represented 50% of the respondents. The criteria weights were determined based on Relative Importance Index (RII. Ninety-one tenders(13 projects) were used to train and test the ANN model after re-evaluating the contractors depend on the weights of factors to select the best contractor who achieves the highest score. Neurosolution software was used to train the models. The results of the trained models indicated that neural network reasonably succeeded in selection the best contractor with 95.96% accuracy. The performed sensitivity analysis showed that the profitability and capital of company are the most influential parameters in selection contractors. This model gives chance to the owner to be more accurate in selecting the most appropriate contractor.

• Computers and Concrete
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• 제22권3호
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• pp.327-336
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• 2018

Increase in population and its daily increasing in our today society results in an increase in housing demand while traditional methods are not applicable. The project preparation and realization processes, based on theoretical and empirical studies, a creation of goods, services, and technologies, are the most important human activities. Selection of effective technological systems in construction is a complex multi-criteria decision-making task. Many decision-makers refuse innovations once faced with similar difficulties. Therefore, using modern materials and methods in this industry is necessary. Modern methods increase quality and construction speed in addition to decrease energy consumption and costs. One of the problems in the way of any project is selecting construction system compatible with the project needs and characteristics. In the present research, different concrete structures such as common reinforced concrete (RC) structure, prefabricated, Insulating Concrete Formwork (ICF), 3D Panel and Tunnel Concrete Formwork (TCF) for buildings with limited floors in Iran are studied and compared from the viewpoint of different criteria like cost, time, applicability and technical characteristics with industrialization approach. Therefore, some questionnaires filled out by construction industry experts in order to compare criteria and sub-criteria in addition to evaluation of optimized structural systems. Then, results of the questionnaires ranked by Analytic Hierarchy Process (AHP) and the most effective alternative selected. The AHP results show that 3D Panel system 36.5%, ICF 21.7%, TCF 19.03%, prefabricated system 13.3% and common RC system 9.3% are the most and the least efficient systems respectively.