• 대한토목학회논문집
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• 제37권1호
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• pp.143-151
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• 2017

최근 기후변화에 대응하기 위해 새롭게 체결된 파리협정에 따라 우리나라는 2030년까지 기준대비 37%의 탄소배출량 감축목표를 제시하였다. 이를 위해 28개 산업분류에서 3번째로 많은 이산화탄소를 배출하는 건설산업에서 보다 적극적인 연구가 필요하다. 본 연구에서는 기존의 완공된 국도건설사례들 중 터널과 교량을 제외한 도로분야만을 이용하여 전과정평가(LCA)를 실시하여 환경부하량을 산출 하였다. 산출된 환경부 하량을 기반으로 대공종의 대표공종을 선정한 결과 토공, 배수공, 포장공이 전체의 84%를 차지하였으며, 세부공종별 대표공종을 선정하여 각 세부공종별 환경부하량 특성을 분석하였다. 국도건설공사 시 환경부하량 공종별 배출특성을 이용한다면 환경부하량을 기반으로 하는 친환경적인 국도건설공사 의사결정에 도움이 될 것이다.

• 한국도로학회논문집
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• 제10권3호
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• pp.109-118
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• 2008

본 연구에서는 현재 실존하는 제방을 대상으로 제방겸용도로 건설에 따른 안정성의 변화를 살펴보기 위해 건설단계별로 도로건설을 위한 성토 후, 겸용도로 건설 후 도로를 주행하는 차량에 의한 교통하중이 재하될 경우로 구분하여 안정성 변화를 분석하였다. 연구결과 겸용도로 건설을 위한 성토 후와 교통하중(DB-24)을 적용하였을 경우 모두 일반적인 안전율 기준인 1.3을 상회하고 있어 겸용도로 건설에 따른 제방의 안전은 확보되는 것으로 분석되어 제방겸용도로의 건설은 부지 확보 비용 절감을 위해 건설이 가능할 것으로 판단된다. 그러나 겸용도로의 건설로 인해 제방의 안전율 감소 현상이 발생하기 때문에 안정성에 대한 사전 검토가 충분히 이루어져야 할 것이다. 특히 안전율 감소가 가장 큰 경우는 비정상류 상태의 수위상승의 경우로 분석되어 하천제방과 같이 수위변화가 빈번한 경우에는 비정상류 해석으로 설계하는 것이 바람직하며 제내지의 사면경사는 기존제방과 동일한 1:2의 경사를 유지하도록 설계하는 것이 필요할 것으로 판단된다. 또한, 교통하중에 의한 안전율 감소현상도 발생하는 것으로 분석되어 겸용도로 건설 후 주행차량의 하중제한 등 유지 관리에도 지속적인 관심을 기울여야 할 것으로 판단된다.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.493-502
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• 2020

Traditionally, road projects are initiated based on an assessment of their economic benefit, after which the environmental, social and governance effects are addressed discretely for the project according to a set of predetermined alternatives. Sustainable road infrastructure planning is vital as issues like diminishing access to road construction supplies, water scarcity, Greenhouse Gas emissions, road-related fatalities and congestion pricing etc., have imposed severe economic, social, and environmental damages to the society. In the process of addressing these sustainability factors in the operational phase of the project, the dynamics of these factors are generally ignored. This paper argues that effective delivery of sustainable roads should consider such dynamics and highlights how different aspects of sustainability have the potential to affect project sustainability. The paper initially presents the different sustainability-assessment tools that have been developed to determine the sustainability performance of road projects and discuss the inability of these tools to model the interrelationships among sustainability-related factors. The paper then argues the need for a new assessment framework that facilitates modelling these dynamics at the macro-level (system level) and helping policymakers for sustainable infrastructure planning through evaluating regulatory policies.

• 한국측량학회지
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• 제39권2호
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• pp.103-111
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• 2021

MMS (Mobile Mapping System) is being used for HD (High Definition) map construction because it enables fast and accurate data construction, and it is receiving a lot of attention. However, research on the use of MMS in the construction field is insufficient. In this study, road surveying and inspection of construction structures were performed using MMS. Through data acquisition and processing using MMS, point cloud data for the study site was created, and the accuracy was evaluated by comparing with traditional surveying methods. The accuracy analysis results showed a maximum of 0.096m, 0.091m, and 0.093m in the X, Y, and H directions, respectively. Each RMSE was 0.012m, 0.015m, and 0.006m. These result satisfy the accuracy of topographic surveying in the general survey work regulation, indicating that construction surveying using MMS is possible. In addition, a 3D model was created using the design data for the underpass road, and the inspection was performed by comparing it with the MMS data. Through inspection results, deviations in construction can be visually confirmed for the entire underground roadway. The traditional method takes 6 hours for the 4.5km section of the target area, but MMS can significantly shorten the data acquisition time to 0.5 hours. Accurate 3D data is essential data as basic data for future smart construction. With MMS, you can increase the efficiency of construction sites with fast data collection and accuracy.

• 대한토목학회논문집
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• 제36권2호
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• pp.269-276
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• 2016

최근 책임감리제도가 CM제도로 전환되고 ICEC 등급체계가 도입되는 과정에 건설관련 단체들은 국토교통부에 수시로 의견을 제시하고 있다. 그러나 그 정책 변화에 대하여 도로건설기술자들이 어떻게 인식하고 있는지 조사된 자료가 없다. 본 연구에서는 건설기술교육원에서 직무교육을 받고 있는 도로건설기술자들을 대상으로 CM과 ICEC 등급체계에 대하여 2차례 설문조사를 실시하고 분석하였다. 도로건설기술자들의 응답 추세는 외부 기관에 별도로 의뢰한 설문조사를 통하여 검증하였다. 그 결과를 토대로 하여 엔지니어링업계의 국제경쟁력을 높일 수 있는 건설정책 개선안을 도출하였다.

• 한국물환경학회지
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• 제20권5호
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• pp.494-499
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• 2004

Growth in population and urbanization has progressively increased the loadings of pollutants from non-point sources as well as point sources. Therefore, it is necessary to manage both point and non-point sources contaminations for protecting water environment and improving water quality. This study investigated the characteristics of pollutant release over a wide range of rainfall intensities as a requisite to control road runoff that accounts for the largest portion of non-point source contamination in urban areas. Samples of runoff rainwater collected from real road surfaces were analyzed for physicochemical parameters such as pH, suspended solids, and heavy metals. A experimental model road ($30cm{\times}30cm$) was also used to evaluate wash-off properties of pollutants deposited on the surface as functions of time and rainfall intensity. Analysis of runoff samples on rain events showed that the pollutant wash-off patterns for heavy metal and suspended solids were similar. This implies that the particles in rainwater adsorb heavy metals. Experiments using the model road made of impervious asphalt demonstrate a strong first flush phenomenon. At high rainfall intensity, approximately 80% of total pollutants were released within 15 min. The pollutant wash-off rates rapidly increase from 9 mm/hr to 12 mm/hr of rainfall intensity and decrease over 12 mm/hr of rainfall intensity.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.296-302
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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 accumulated for last six years. The EIA for railroad construction projects .accounts for only $4.9\%$ of total project EIAs during 1998-2003. However, 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 quality, wast management, noise, etc. We also compared the characteristics of environmental impacts of railroad construction with those of vehicle road construction. The result shows that railroad construction usually requires 3${\~}$4 times longer tunnels and bridges for a given length than vehicle road construction. In addition, the amounts of geomorphological and ecological changes (road-cutting, embankment, devegetation, etc.) in railroad construction were generally less than $40\%$ of those in vehicle road construction. In order 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 required.

• 한국환경복원기술학회지
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• 제2권3호
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• pp.83-92
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• 1999

To investigate the influence of forest road characteristics and site conditions on the stability of forest-road in granite area, four forest roads had been selected in Kyongbuk regions. The total of 13 road characteristic variables were evaluated by the discriminant analysis. The factors influencing the stability of forest road were bed rock, slope length, coverage, hardness, side-ditch erosion and road width. But aspect and soil texture were not significant for the stability in this area. In the correlation between forest environment and road structure, hardness and bed rock was highly significant in stability group, and coverage and side-ditch erosion was highly significant in instability group. 75 of 175 segments were instable whereas the others were stable. The centroids value by discriminant function in the stability and instability were estimated to 3.0585 and -1.9116, respectively. The stability criterion of forest road was discriminated from the centroids value of the each group. The main factors contributing the stability of forest road were significant in order of side-ditch erosion, coverage, soil texture, elevation, gradient, slope length and construction year. The prediction rate of discriminant function for stability evaluation of forest road was as high as 97.44%. In conclusion, the forest road structure factors such as length, coverage and slope gradient were controlled by construction techniques. If the factors like those should be considered in design, construction and forest road management, the stability of forest road may increase more. And also, it is necessary to take slope protection measures like small terraces and retaining walls for stability of cut slope.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.286-291
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• 2011

Onsite usage of construction equipment accounts for a 6.8% of air pollution in Korea. The high concentration of carbon dioxide in such emissions impact not only climate change, but also people's health. However, greenhouse gas emissions from onsite equipment usage have not yet been fully investigated. This study presents a comparative analysis on how much greenhouse gas is generated by various equipment types used in different construction activities. Two ongoing cases which involve a typical road construction project in Korea were selected for the comparison purpose. Greenhouse gas emissions from each onsite equipment usage of the different activities were estimated on the ground of design documents. The estimates were compared and analyzed to derive the main sources of greenhouse gas emissions. The result showed that earthwork constituted the largest part-more than 90%-among work types. Dump truck, bulldozer, and loader were major sources for such emissions. The study results are expected to be used as a basis for reduction of greenhouse gas emission from onsite equipment usage.

• 대한환경공학회지
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• 제37권2호
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• pp.107-112
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• 2015

도로는 건설 시 많은 건설자재와 장비를 사용하여 시공단계에서의 탄소배출량이 매우 높다. 도로분야에서의 온실가스 감축을 위하여 도로의 전과정에 걸친 탄소배출량 산정 방법에 대한 연구를 수행하여 탄소배출량 산정방법을 정립하였으나, 수집해야 하는 자료 확보와 산정 절차가 복잡해 탄소배출량 산정에 어려움을 겪고 있다. 이에 따라 본 연구에서는 도로시설 물의 시공단계에서 발생하는 탄소의 정량적 산정을 쉽게 할 수 있도록 탄소배출원단위를 개발하여 제시하고, 이를 활용하여 2012년 기준으로 고속국도 및 일반국도의 탄소배출량을 정량적으로 산정 후 활용방안을 제시하였다.