• 한국도로학회논문집
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• 제9권2호
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• pp.115-127
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• 2007

최근 도로선진국이라 할 수 있는 나라들에서는 다양한 도로사업의 발굴 및 장려정책이 도입되고 있다. 본 논문에서는 새로운 도로사업의 발굴을 위한 대안모형을 제시하였다. 새로운 도로사업 발굴을 위한 절차로는 근거법령의 모색 신개념 도로사업의 발굴, 평가 모형구축 및 운영지침 개발, 관련행정체계 개선 등 크게 4가지의 주요 절차가 필요한 것으로 제시되었다. 근거법령의 모색은 도로법 및 도로법 시행령, 시행규칙 등이 우선 고려되어야 할 것으로 분석되었으며 신개념의 도로사업 발굴절차는 크게 국가적 차원의 유일성 확보 도로, 다양한 가치기준에 의해 선정되는 도로 및 단일시설, 기술(설계 우수VE 및 LCCA사례 포함) 및 구조물 형태로서 발굴될 수 있는 사례로 세분류하였다. 평가모형 구축 및 운영지침 개발절차에서는 미국 NSBP프로그램의 절차 혹은 지속가능한 도시대상의 절차를 사례로 할 수 있으며 분석적 계층화법(AHP) 및 다지역산업연관모형(MRIO)의 적용가능성도 제시하였다. 또한, 관련 행정체계의 개선에서는 건설교통부의 도로기획관실 업무내역 분석을 통해 도로정책팀과 도로환경팀의 역할을 제시하였으며 평가위원회의 구성, 평가과정과 일체화된 예산지원절차를 추진방안으로 제시하였다.

• 콘크리트학회지
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• 제28권3호
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• pp.46-49
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• 2016

• 콘크리트학회지
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• 제21권1호
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• pp.33-37
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• 2009

• 한국건설관리학회논문집
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• 제19권4호
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• pp.52-60
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• 2018

건설산업에서 LCA (Life Cycle Assessment)를 활용하여 환경영향을 평가하려는 시도가 점차 증가하고 있다. 그러나 제한된 사업예산과 일정으로 인해 신속한 의사결정을 수행해야 하는 국내 건설산업에서 모든 자재와 에너지를 대상으로 환경부하량에 대한 검토를 수행하는 것은 곤란하다. 따라서 친환경성 확보를 위한 의사결정과정에서 환경부하 저감을 위해 중점적으로 검토가 수행되어야 하는 주요 영향인자와 이를 환경영향평가로 연계할 수 있는 정량화된 정보의 제공이 요구된다. 이 연구에서는 이러한 정보의 제공을 위해 도로건설공사 사례의 LCA결과를 분석하였다. 분석결과 경유, 레미콘, 우레탄계도료, 골재, 아스팔트콘크리트가 도로 토공작업부에서 환경부하량의 93.17%를 발생시키는 주요 영향인자로 조사되었다. 도로 토공작업부 1km를 시공할 때 이들 영향인자에 의해 발생하는 총환경비용은 약 242백만원이며 레미콘과 아스팔트콘크리트의 작업물량 10%를 절감함에 따라 5.02%와 2.28%의 탄소배출량 감축효과를 얻을 수 있다. 두 자원의 탄소배출량 감축을 통해 1km당 약 11백만원의 환경비용을 절감할 수 있는 것으로 분석되었다. 도로 토공작업부의 탄소배출량 감축을 위해서는 레미콘과 아스팔트콘크리트의 사용량을 감소시키기 위한 신공법이나 친환경자재의 적극적인 개발과 도입이 필요할 것으로 판단된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.197-203
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• 2003

Korea Highway Corporation(KHC) began the ambitious KHC Test Road construction project from 1997. It is 7.7km long two-lane highway next to the mainline of Jungbu Inland Expressway. The KHC Test Road construction was completed at the December 2002. It is composed of twenty-five PCC test pavement sections. Section design parameters are (1) concrete slab thickness, (2) base type, (3) base thickness (12, 15, and 18cm), and (4) pavement type. Twenty-five PCC test pavement sections contain 1241 sensors to evaluate the behavior of pavement system under traffic load and environmental change. The behavior of pavement systems will be identified by the observation of sensor measurement and pavement distress survey from test pavement sections. The Test Road research outcome will validate the Korean Pavement Design Guide which is develop by on-going funded research from the Ministry of Construction and Transportation.

• 환경영향평가
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• 제13권6호
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• pp.295-305
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• 2004

After the Rio declaration on environment and development in 1992, developed countries are undertaking "environmentally sustainable transportation (EST)" projects. To meet the needs for EST, current transportation policies in Korea are rapidly reforming and one of its concerns is modernizing and upgrading railway freight system. Planning new railroad construction projects is increasing and subsequent environmental impact assessment (EIA) demands improvements, especially in both the EIA and decision making systems. In this paper, we discuss the present status of EIA for railroad construction projects, especially, by analyzing the EIA documents for the last six years. The EIA for railroad construction projects accounts for only 4.9% of total 918 project EIAs during 1998-2003, and the portion is gradually increasing. Major environmental concerns for EIA in railroad construction projects were geomorphological and ecological changes, protection of rare organisms, air pollution, water pollution, waste management, and noise, etc. We compared characteristics of environmental impacts of railroad construction with those of vehicle road construction, based on environmental and construction-planning indicators appeared in Environmental Impact Statements. Railroad construction usually requires longer tunnels and bridges for a given length than those for vehicle road construction. In addition, the amounts of geomorphological and ecological changes (road-cutting, embankment, devegetation, etc.) in railroad construction were generally less than 50% of those in vehicle road construction. To develop environmentally friendly railway systems, monitoring studies for environmental impacts of railroads such as habitat fragmentation and road kills, dispersal of alien plants, tunnelling effects on groundwater and vegetation, and noise impacts are highly recommended.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.800-807
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• 2009

The limited public funds available for infrastructure projects have led governments to consider private entities' participation in long-term contracts for finance, construction, and operation of these projects to share risks and rewards between the public and the private. Because these projects have complicated risk evolutions, diverse contractual forms for each project member to hedge risks involved in a project are necessary. In light of this, Build-Operate-Transfer(BOT) model is considered as effective to accomplish Public Private Partnerships(PPPs) with a characteristic of an ownership-reversion. In BOT projects, the government has used such an incentive system as minimum revenue guarantee(MRG) agreement to attract the private's participation. Although this agreement turns out critical in success of BOT project, there still exist problematic issues in a financial feasibility analysis since the traditional capital budgeting theory, Net Present Value(NPV) analysis, has failed to evaluate the contingent characteristic of MRG agreement. The purpose of this research is to develop real option model based on option pricing theory so as to provide a theoretical framework in valuing MRG agreement in BOT projects. To understand the applicability of the model, the model is applied to the example of the BOT toll road project and the results are compared with that by NPV analysis. Finally, we found that the impact of the MRG agreement is significant on the project value. Hence, the real option model can help the government establish better BOT policies and the developer make appropriate bidding strategies.

• 한국도로학회논문집
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• 제20권4호
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• pp.21-26
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• 2018

PURPOSES : The objective of this study is to evaluate the application of soil stabilization method for soft shoulder construction in the iRoad Project of Sri Lanka. METHODS : Firstly, the quantitative analysis of soil strength improvement due to soil stabilization was done for soil samples collected from iRoad construction sites. Two types of soils were selected from iRoad Project sites and prepared for soil stabilization testing by the Road Development Authority. Secondly, the appropriate stabilizer was selected at given soil type based on test results. Two different stabilizers, ST-1 and ST-2, produced in Korea were used for estimating soil strength improvements. Finally, the optimum stabilizer content was determined for improving shoulder performance. The uniaxial compressive strength (UCS) test was conducted to evaluate the strength of stabilized soil samples in accordance with ASTM D 1633. The use of bottom ash as a stabilizer produced from power plant in Sri Lanka was also reviewed in this task. RESULTS : It is found from the UCS testing that a 3% use of soil stabilizer can improve the strength up to 2~5 times in stabilized soft shoulder soils with respect to unstabilized soils. It is also observed from UCS testing that the ST-1 shows high strength improvement in 3% of stabilizer content but the strength improvement rate with increase of stabilizer content is relatively low compared with ST-2. The ST-2 shows a low UCS value at 3% of content but the UCS values increase significantly with increase of stabilizer content. When using the ST-2 as stabilizing agent, the 5% is recommended as minimum content based on UCS testing results. Based on the testing results for bottom ash replacement, the stabilized sample with bottom ash shows the low strength value. CONCLUSIONS : This paper is intended to check the feasibility for use the soil stabilization technique for shoulder construction in Sri Lanka. The use of soil stabilizer enables to improve the durability and strength in soft shoulder materials. When applying the bottom ash as a soil stabilizer, various testings should be conducted to satisfy the specification criteria.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 봄 학술논문 발표대회
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• pp.155-156
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• 2020

Unlike new construction projects, road paving maintenance work shows large productivity discrepancies depending on the conditions of the worksite. The current construction cost calculation scheme, however, only provides daily construction volume categorized by work scope and scale: There are no detailed standards that can be implemented on various types of worksites. To develop standards that enable the calculation of appropriate construction costs by taking into account worksite conditions, the current study conducted on-site surveys and interviews. The on-site research and analysis revealed that location, construction width, the day's worksite lot, work scope, and construction objectives were found to cause differences in construction volume. In addition to the existing work scope and work scape variables, the current study added weight constants reflecting the daily work volume based on movement conditions at site and the size of the worksite lot. In this process, the current study found that even one type of construction project can have fifteen different levels of daily construction volume. Such detailed classification was deemed to enable the proper calculation of construction costs based on worksite conditions.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.153-161
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• 2022

Among all industries, the construction industry still remains a traditional one with low productivity due to its labor-intensive and field-dependent production system, its supplier-oriented industrial structure, and the disruption of the information flow between participants. In addition, the construction industry in South Korea has recently been required to transform itself according to social trends such as aging, the reduction of skilled workers, and the shortening of working hours, and the disaster and death rates in the industry, which are more than twice as high as those in other industries, are making it more necessary to solve chronic safety problems. Therefore, the purpose of this study is to grasp the actual condition of safety management on construction sites in South Korea and analyze cases of K-smart technology utilization for preventing safety accidents on construction sites. The study investigated and analyzed the following. First, construction sites in South Korea were analyzed by type of safety accident, by type of construction, and by construction contract amount. Second, the current status of accidents on small-sized construction sites with a high fatal accident rate and cases of safety accidents on construction sites were investigated. The results of the study are expected to contribute to the dissemination and spread of smart safety technology for not only identifying major factors in safety accidents that occur on construction sites but also preventing workers from suffering accidents.