• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.147-149
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• 2015

A nuclear power plant construction project normally involves a large construction work of which the total project cost is over 5 trillion Won, Such a large-scale construction project has the risks of schedule delay and quality degradation due to increase in project cost, because designs are changed due to design errors. The reasons for design changes during installation are 1) insufficient engineering capability of the owner, 2) information discontinuance due to the multiple package method, and 3) inefficient constructability review processes. Accordingly, this study proposes, through problem analysis, a method of developing a constructability review system that utilizes constructability review processes and a data-based technology (3D modeling) that are optimized for nuclear power plant construction projects. It also presents a method of establishing a system for reviewing constructability in which constructability review processes and a Database (3D model, Schedule, Design change Items) are linked each other.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 추계 학술논문 발표대회
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• pp.69-70
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• 2016

The constructability of formwork has a significantly influence on the duration and cost in tall building construction. However, current installation and dismantling process are conducted with heuristic approaches due to the absence of reasonable constructability review method. This study proposes a new method to review the constructability of formwork by utilizing 3D printing technology. It is expected that the suggested review method could reduce formwork duration and cost with subjective, but rational manner.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1154-1157
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• 2005

This report is to do design management for constructability review of high quality exposed concrete, which is used increasingly in recent. To secure systematic management at design phase, we reviewed each definition and work at each design phase, we define high quality exposed concrete, a part of architectural concrete, as "an exposed concrete which has well ordered joint & is in pursuit of smooth surface." We reviewed requirements and influential factor to obtain High quality finishing surface and compared construction process of high quality exposed concrete with that of other finishing method. Management method at each design phase for constructability review to meet additional works and requirements is presented.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1150-1153
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• 2005

The orders of Design-Build Delivery System (DBDS) in a large and public construction project have been increasing. Single Source Responsibility (SSR) for design and construction, which contributes to quality improvement of design and construction, has been performed. The DBDS performs SSR for design and construction, but, it has not maximized effect because of the dissatisfied alternative analysis procedures which are based on constructability evaluation and the information system in the design step. In this research, Constructability Evaluation Factors (CEFs) that must be evaluated, investigated, and reflected in the basic design step for design-build projects. The CEF proposed and the business process of each conductor has been systematized. To propose constructability evaluation factors, first classify drawing information by the constructability evaluation sphere. CEFs must be proposed to evaluate factors according to interference among work items. Second, applicable CEFs must be classified by preference ranking and weight. Third, the values of constructability factors in accordance with building elements and work items, need to be calculated. Finally, the CEFs proposal will support rational decision making, design cost reduction, and quality improvement through the values for constructability of building elements and work items.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.1-8
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• 2007

Construction designs are often produced with insufficient considerations on the constructability aspects. Poor constructability has resulted in delay, cost increase, disputes, safety hazards and inconvenience to the public. Increasingly, there has been a call for more systematic input of construction knowledge in the planning and design processes of modern day's infrastructure development. In some countries, notably the US, the practice of constructability reviews is on the rise, with concomitant benefits. It is advocated that construction plans and designs be subject to constructability reviews as early as possible. It should be made part of the project management strategy driven by the client. This paper outlines the constructability review process and benefits, whilst drawing lessons from a number of case studies.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.149-150
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• 2019

Recently, major public owner and general contractors in Korea are actively preparing and improving BIM manuals and guidelines to effectively apply BIM technology in construction projects. These guideline has a purpose to define the scope of the applying BIM technology to each construction phase and to explain the minimum technology guidance required for the initial stage. In situations where BIM data are to be submitted within a limited time and cost at the design stage, a BIM data preparing process should be carried out in advance to meet the BIM interoperability between the pre and post of construction precess. In this research, we propose the scope of the BIM guidelines to meet and to be considered for the BIM based review of constructability and economic evaluation of Apartment.

• 대한토목학회논문집
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• 제35권4호
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• pp.941-951
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• 2015

국내 건설기업들은 해외건설 시장에서 6천 8백억 불 수주를 달성하는 등 양적성장을 지속해 왔으나, 원천기술과 사업관리 역량이 선진기업에 비해 상대적으로 뒤지고 있으며 최근 무리한 저가수주로 인해 대규모 적자가 발생하는 등 어려움을 겪고 있다. 따라서 이러한 원천기술과 사업관리역량을 극복하기 위한 대안이 필요한 실정이며 시공성 개념은 이러한 대안의 하나이며 해외 선진국에서 다양한 연구결과가 실무에 적용되고 있다. 국내기업이 해외 EPC건설공사에서 경쟁력을 확보하기 위해서는 시공성 개념의 실무적용이 필요하다. 시공성이란 건설공사에서 전체 프로세스에 영향을 미치는 요인들의 범위를 의미하며, 시공용이성과 프로젝트의 품질을 확보하는 것을 의미한다. 따라서 본 연구에서는 국내 건설기업의 해외건설공사에 대한 시공성을 적용하기 위하여, 설계단계 및 시공단계에서 시공성에 영향을 주는 요소로 연구의 범위를 한정하고 구조 방정식 모델을 활용한 시공성 평가모델을 구축하고자 한다. 여러 변수들 간에 복잡하게 연결된 인과관계를 분석하는데 구조방정식을 활용하였으며 직 간접효과를 동시에 도출하여 해외건설 프로젝트 시공성에 미치는 영향과 상호관계를 파악하고자 하였다. 해외건설공사의 시공성에 영향을 미치는 영향요소는 문헌고찰, 기업보고서 및 전문가 자문, 설문조사를 통하여 8개의 잠재변수와 34개의 측정변수를 도출하였다. 본 연구에서 제시한 모델은 해외건설공사의 시공성을 가장 효과적으로 향상 시킬 수 있으며 비용절감, 공기단축, 품질향상 측면에서 전략적 대응방안을 수립함으로써 사업의 최종 목표를 성공적으로 달성하는데 기여 할 것으로 판단된다.

• 한국건설관리학회논문집
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• 제11권5호
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• pp.65-74
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• 2010

시공단계의 경험 및 지식을 반영한 설계 결과물은 시공 효율성을 향상시키고 설계변경을 최소화하여 프로젝트의 낭비요인 제거와 전체적인 생산성 향상을 가능하게 해준다. 설계자가 설계단계에서 시공단계의 경험 및 지식을 효과적으로 활용하기 위해서는, 설계과정에서 필요한 시공성 지식을 필요한 시점에 활용할 수 있어야 한다. 설계단계에서 시공성 지식의 효과적인 활용을 위한 기존의 접근방법은 체크리스트와 같이 설계단계 별로 활용되는 시공성 지식의 구조화에 초점을 맞추고, 설계의 사결정과정의 기본단위가 되는 액티비티 수준에서 시공성 지식의 활용시점에 대한 고려가 부족하다. 하지만 적절하지 않은 시점에서 고려된 시공성 지식은 설계자에게 불필요한 재작업을 야기해 설계생산성을 저하시키는 문제를 발생시킬 수 있다. 이러한 비효율적인 정보교환을 최소화하기 위해서는, 설계 프로세스 상에서 정보흐름에 중점을 둔 설계관리를 통해 각 시공성 지식들을 요구하는 설계 액티비티가 무엇인지를 파악해야 한다. 이에 본 연구는 Dependency Structure Matrix(DSM)를 이용하여 설계의사결정과정의 기본단위가 되는 설계 익티비티와 설계과정에서 고려해야 하는 시공성 지식간의 상호관계를 고려한 정보흐름기반의 설계프로세스관리를 제안한다. 이는 설계프로세스관리를 설계단계에서의 단순한 설계검토보다 한 단계 높은, 건설프로젝트 전 과정과 연계된 포괄적인 관리활동으로 발전시켜 건설생산합리화에 크게 기여할 수 있으리라 예상된다.

• 한국건축시공학회지
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• 제23권3호
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• pp.315-326
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• 2023

The design principles and implementation of rebar lap splice in architectural structures are governed by building regulations. Nevertheless, the minimization of rebar-cutting waste (RCW) is often impeded by the mandatory requirements pertaining to the rebar lapping zone as prescribed in design codes. In real-world construction scenarios, compliance with these rules often falls short due to hurdles concerning productivity, quality, safety, time, and cost. This discrepancy between code stipulations and on-the-ground construction practices necessitates an academic exploration. The goal of this research was to delve into the effect of rebar lap splice placement on the robustness and constructability of building edifices. The study initially took on a review of the computation of rebar lapping length and the rules revolving around the lapping zone. Following this, a structural robustness and constructability examination was undertaken, focusing on adherence to the lap splice zone. The interpretations and deductions of the research led to the following insights: (1) the efficacy of rebar lap splice is not solely contingent on the moment, and (2) the implementation of rebar lap splice beyond the specified zone can match the structural integrity and robustness of those confined within the designated area. As a result, the constraints on the rebar lapping zone ought to be revisited and possibly relaxed. The conclusions drawn from this research are anticipated to reconcile the disconnect between building codes and practical construction conditions, furnishing invaluable academic substantiation to further the endeavor of achieving near-zero RCW.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 추계 학술논문 발표대회
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• pp.187-188
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• 2017

Korean government is trying to adopt 'CM at Risk(CMR)' method to solve some problems of traditional project delivery method such as cost increase, delay, low quality. Pre-construction service(PCS) is a project management methodology of CMR and BIM is the best tool for efficient PCS execution. PCS is consisted of several main items such as Target costing, Cost trending, GMP, Design optimization, Constructability review and Productivity. The purpose of this research is to analyse contractor's PCS application case result and to find improvement items.