KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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LCA-based Environmental Impact Analysis for Prestressed Concrete Girders

프리스트레스 콘크리트 거더의 LCA기반 환경영향 분석

  • 최경찬 (경북대학교 토목공학과) ;
  • 김도훈 (경북대학교 토목공학과) ;
  • 박진영 (경북대학교 지능형건설자동화연구센터) ;
  • 김병수 (경북대학교 토목공학과)
  • Received : 2019.10.23
  • Accepted : 2019.11.06
  • Published : 2020.02.01
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Abstract

Bridges which are components of road network consume large amounts of resources such as concrete and steel materials, which have large environmental impacts during construction. This causes a great environmental burden. In order to reduce the environmental impact caused by the construction of the bridge, the environmental impact should be reviewed based on reasonable data in the early design stage. The purpose of this study is to provide basic data for LCA-based environmental impact assessment in the process of selecting bridge type in the early design stage. For this purpose, design data for four types of PSC bridges (general PSC girder, IPC girder, e-Beam, DR girder) were collected and LCA was performed to analyze the basic unit value and impact factors of environmental load. The results of the analysis showed that the environmental impact of IPC girder was the smallest, and the environmental impact of e-Beam was 133.7% higher than that of IPC girder. In addition, concrete, reinforcement, PC strand, square timber, sheath pipe, and steel plate were derived as the main factors that generate 98.5% of the overall environmental impact of PSC girder.

도로의 부속시설인 교량은 시공과정에서 콘크리트 및 강재와 같이 환경영향이 큰 자원을 다량 소비하며 이로 인해 큰 환경적 부담을 발생시킨다. 교량의 시공으로 인해 발생하는 환경영향을 줄이기 위해서는 초기 설계단계에서 합리적인 자료를 토대로 환경영향에 대한 검토가 수행되어야 한다. 이 연구는 초기 설계단계의 교량형식 선정과정에서 LCA (Life Cycle Assessment) 기반의 환경영향평가가 가능한 기초자료를 제공하고자 하였다. 이를 위해 기 시공된 4가지 형식(일반 PSC거더, IPC거더, e-Beam, DR거더)의 PSC교량에 대한 설계자료를 수집하고 LCA를 수행하여 환경부하 원단위값과 영향요인을 분석하였다. 분석결과 IPC거더의 환경영향이 가장 작게 나타났고, e-Beam의 환경영향은 IPC거더 보다 133.7% 크게 평가되었다. 또한 콘크리트, 철근, PC강연선, 각재, 쉬즈관, 강판이 PSC거더 전체 환경영향의 약 98.5%를 발생시키는 주요인자로 도출되었다.

Keywords

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