• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.479-487
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• 2013

State Highway Agencies (SHAs) have started utilizing cost-plus-time bidding (A+B bidding) since Federal Highway Agency (FHWA) declared it operational on May 4, 1995. Although this technique has successfully accelerated many projects by incorporating construction time in the bidding competition, a framework to illustrate the interactions of incentive/disincentive (I/D) rates on the competitiveness of contractors participating in the bid competition is yet to be developed. In a previous research, authors indicated that for each bid competition there is an efficient cap for I/D rates which are dictated by the capabilities of contractors in project acceleration. However, the results of previous study were based on the assumption that there is a statistically significant relationship between cost and time. In this study, the entire cost-plus-time projects implemented by the Oklahoma Department of Transportation (ODOT) were investigated. Then the significance of relationship between cost and time were analyzed for each contractor utilizing Analysis of Variance (ANOVA) technique, and the price-time function of each contractor was determined by regression analysis. The results of the analysis indicate that there is a significant relationship between cost and time for the majority of contractors. However, a quadratic relationship is not always significant and for some contractors a linear price-time relationship is significant. The results of this project can be used not only by ODOT to optimize the incentive/disincentive rates but also by contractors to determine the most competitive strategies of other bid participants.

• 한국건설관리학회논문집
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• 제19권1호
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• pp.3-11
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• 2018

본 연구에서는 효율적인 도로 유지관리를 위한 적극적인 민간의 참여방안을 위해 도로시설 개량사업 추진현황 및 현 추진 중인 민간자본 활용 개량사업의 개선사항을 검토하고, 이를 바탕으로 새로운 사업방식이 적용된 사례조사, 재무적 타당성 분석 업무 등을 수행하여 적용 가능한 사업방식을 선정하였다. 분석 결과, 현 추진 중인 민간자본 활용 개량사업의 민간방식보다 크라우드 펀딩을 활용한 방식이 비용측면에서 가장 유리한 것으로 분석되었으며, 고속도로 이용자, 특히 개량공사 구간 이용자로부터 자금을 조달 한다는 점에서 활용효과가 높을 것으로 판단된다. 또한 공사로 인해 불편을 겪는 도로이용객에게 도로공사가 얻는 통행료 이익을 사용자에게 환원한다는 의미도 부여할 수 있다.

• 산업기술연구
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• 제27권B호
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• pp.177-184
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• 2007

Project Financing(PF) was introduced from the way of banks' conditional financing that take buried oil as security and offer required money to oil explores which have weak loaning ability in the U.S. 1930s. After that PF has developed with financial market and it has been activated in the market of Korea since 'An Institution about Private Financing Invitation Promotion' was established. Started with I-Hwa Ryoung tunnel project, PF has been used in the Metropolitan Area Airport Highway and etc. But because of the risk that occurred by PF's complexity and uncertainty, PF has not been used fully and there are only few practical examples. The purpose of the present study is to investigate how to decrease, identify and extract the risky factors of project that being planned by PF.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.563-572
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• 2007

Transportation infrastructure is critical to economic growth of a country such as China. Careful evaluation of investments in traffic infrastructure projects is therefore pertinent. As traditional evaluation methods do not consider the uncertainty of future cash flows and mobility during project execution, the real option approach is gradually gaining recognition in the context of valuing construction and infrastructure projects. However, many of the cases only evaluate individual options separately although multiple options often exist in a typical large infrastructure project. Using a highway project in China as a case study, this paper first evaluates a deferment option and a growth option embedded in the project. Subsequently, the values are combined using the fuzzy analytical hierarchy process. It is found that the combined value is less than the sum of the two option values. This finding is consistent with the theoretical observations given in past real option literature despite the use of a different approach.

• 한국건설관리학회논문집
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• 제7권3호
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• pp.138-148
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• 2006

건설공사 현장에서 공공 발주처의 감독자는 공정관리, 품질관리, 안전관리 뿐만 아니라 공사 현장에서 발생하는 다양한 업무를 수행하고 있다. 특히, 한국도로공사 등 4개 공사는 공사특성에 맞게 전문화된 공사현장의 공사관리 업무를 추진하여 왔다. 그러나, 최근 민자사업의 물량 증가와 건설사업관리제도의 도입 등 건설환경의 변화_글 공공 발주처의 감독자는 보다 효율적인 공사관리방식을 도입하여 사업관리의 내실이 필요하게 되었다. 따라서, 본 연구는 국내 공공 발주처의 감독 운영시스템과 선진외국의 공사감독 제도를 조사 분석하여 국내 실정에 맞는 합리적인 공사감독 체계 개선방안을 마련하였다 특히, 본 연구는 고속도로 건설공시 공사감독자의 공사관리방안으로, 검측원의 육성방안과 건설공사 감독업무 매뉴얼, 교육프로그램 로드 맵 구축방안을 제시하였다.

• 기술사
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• 제43권4호
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• pp.44-49
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• 2010

Th Rach Gia Bypass Project, to be implemented under EDCF Loan VNM-12, constitutes a strategically important part of the Greater Mekong Sub-region Southern Coastal Corridor Project(the GMS-SCCP). The main goal of the GMS strategy is to promote sustainable economic growth, improve employment, and achieve poverty reduction by tapping the comparative advantages of Vietnam, Cambodia and Thailand. As a project manager who once took a responsible position for the completion of RGBP's detailed design, I would like to briefly introduce what our design team including the local sub-contractors had performed for the D/Design of this Project last year, especially in the field of highway, bridge and soft soil treatment method widely used in Mekong Delta area. With the performance of nearly two Projects due to the V.O. in one year on the prescribed time, it was a hard year but a rewarding one. To expand our horizon more about overseas projects, several recommendations for the brighter future of overseas projects are shown herein this paper.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1574-1586
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• 2008

Railway is the most effective transportation than any other traffic. But due to the its expensive maintenance fee and various components like roadbed, rail, rollingstock, electric and signal etc, the construction cost of the railway is usually higher than highway. Such a reason, a lot of cost and period are needed to complete the railway project. In addition that considering the decreasing of the SOC budget, the investment in the railway industry is getting hard than ever. This study analyzed the cost, term of work, freight & passenger transportation demand of the wide area railway electrification project and main line improvement project. And it compared the estimation value and real value of the projects like cost and period etc. And this study surveyed the economic feasibility including factors which are not considered in the feasibility study guide. With those results, This study suggest the project management and evaluation method to enlarge the efficiency of the railway construction project.

• 한국멀티미디어학회논문지
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• 제16권2호
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• pp.180-189
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• 2013

SMART Highway 사업은 첨단 IT통신과 자동차 및 도로 기술이 접목된 세계 최고수준의 빠르고 편안한 지능형 녹색도로 실현을 목표로 하고 있다. SMART Highway의 도로-자동차 기반 교통운영의 핵심기술인 VANET(Vehicular Ad-hoc Network)은 다수의 차량들이 무선통신을 이용하여 차량 간 통신 또는 차량과 RSU(Road Side Unit)사이의 통신을 제공하는 차세대 네트워킹 기술이다. 특히, 운전자의 안전에 직접적인 영향을 끼칠 수 있는 V2V 통신의 경우 차량 간의 안전한 통신을 위해 안전한 키 교환이 반드시 고려되어야 한다. 이처럼 빠른 속도로 이동하는 차량 간 안전한 키 교환이 원활이 이루어지기 위해서는 기존의 네트워크에서 사용된 방식은 그대로 적용시키기 어렵다. 따라서 본 논문에서는 다수의 차량 간 통신 시에 보다 효율적이고 안전한 키 교환을 위해 사인크립션을 이용한 차량 간 그룹키 교환기법을 제안한다.

• Computers and Concrete
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• 제11권1호
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• pp.51-61
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• 2013

This paper describes earthquake response of the Arhavi Highway Tunnel its geometrical properties, 3D finite element model and the linear time history analyses under a huge ground motion considering soil-structure interaction. The Arhavi Highway Tunnel is one of the tallest tunnels constructed in the Black Sea region of Turkey as part of the Coast Road Project. The tunnel has two tubes and each of them is about 1000 m tall. In the study, lineartime history analyses of the tunnel are performed applying north-south, east-west and up accelerations components of 1992 Erzincan, Turkey ground motion. In the time history analyses, Rayleigh damping coefficients are calculated using main natural frequency obtained from modal analysis. Element matrices are computed using the Gauss numerical integration technique. The Newmark method is used in the solution of the equation of motion. Because of needed too much memory for the analyses, the first 10 second of the ground motions, which is the most effective duration, is taken into account in calculations. The results obtained 3D finite element model are presented. In addition, the displacement and stress results are observed to be allowable level of the concrete material during the earthquakes.

• 대한토목학회논문집
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• 제29권1D호
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• pp.63-72
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• 2009

본 연구에서는 우리나라 실정에 맞는 도로포장의 장기 공용성 추정 및 자산가치 평가를 위한 의사결정지원시스템을 구축하여, 도로 포장의 공용성 평가와 생애주기분석을 통한 예방적 유지보수를 위한 최적 타이밍의 결정 등에 대한 방안을 제시하고자 한다. 또한 현재 일정한 금액의 예산으로 예산수준에 맞게 유지보수의 장소를 선정하는 근시안적인 예산관리시스템의 문제점을 보완하기 위해 도로관리자가 필요한 예산의 수준을 예측할 수 있도록 장기 소요예산 예측시스템 및 경제성원리를 도입하여 최소 비용으로 도로의 공용성을 유지하기 위한 도로포장자산평가시스템의 구축방안을 제시하고자 한다. 도로포장자산평가시스템 활용에 있어서, 적정수준의 포장평가지수를 유지하기 위해 대상구간의 당해년도 필요유지예산을 참고하여 효율적으로 예산을 편성할 경우, 가장 합리적인 도로포장 유지보수 예산을 분석할 수 있었다. 이러한 결과로, 불필요한 예산의 낭비를 미연에 방지할 수 있을 것으로 판단되고, 도로포장의 장기 공용성 추정 및 자산가치 평가를 위한 의사결정 시스템 개발을 통해 최적 유지보수 기준의 제시 및 새로운 도로포장의 공법 도입을 위한 사전 평가 및 타당성 분석에도 응용할 수 있을 것으로 기대된다.