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Fundamental study on enlargement method of existing subway tunnel during operation for sidetrack construction

부본선 건설을 위한 기존 지하철 터널의 운영 중 확폭 방안에 대한 기초연구

  • Lee, Hyobum (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Koh, Sung-Yil (Seoha Engineering Co., Ltd.) ;
  • Jun, Jonghun (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Yoon, Hee Taek (Advanced Railroad Civil Engineering Division, Korea Railroad Research Institute) ;
  • Yi, Na Hyun (Advanced Railroad Civil Engineering Division, Korea Railroad Research Institute) ;
  • Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 이효범 (고려대학교 건축사회환경공학부) ;
  • 고성일 ((주)서하기술단) ;
  • 전종훈 (고려대학교 건축사회환경공학부) ;
  • 윤희택 (한국철도기술연구원 첨단궤도토목본부) ;
  • 이나현 (한국철도기술연구원 첨단궤도토목본부) ;
  • 최항석 (고려대학교 건축사회환경공학부)
  • Received : 2019.11.20
  • Accepted : 2019.12.20
  • Published : 2020.01.31

Abstract

As a continuous increase in demand for the transportation infrastructure in the metropolitan area, the renovation of existing metropolitan and urban railway lines for the rapid transport system requires the construction of sidetrack that can operate local and express trains simultaneously. However, the construction of sidetrack after stopping the operation of the existing subway line causes a lot of economic losses, therefore it is essential to study the tunnel enlargement scheme during the operation of the existing subway tunnel. Accordingly, in this paper, basic research on the enlargement plan of the existing subway tunnel was carried out for the renovation of the existing subway line. In order to investigate the method for the sidetrack construction, the Government Complex Gwacheon station on the Gwacheon line of subway line 4 was selected as a virtual research station. Subsequently, four construction plans including tunnel cross-sectional plan for each section were reviewed and constructability and economic feasibility were compared. Finally, the stability assessment was conducted for the selected construction plan which was considered to be relatively unstable by 3-D full numerical analysis considering the sidetrack construction process.

지속적인 수도권 교통 인프라 수요의 증가에 따른 광역·도시철도 노선의 급행화를 위해서는 완행과 급행철도를 동시에 운영할 수 있도록 하는 부본선의 건설이 요구된다. 그러나 기존 지하철 노선의 운행을 중단한 후 부본선을 건설하는 것은 많은 경제적 손실을 발생시키므로 기존 지하철 터널의 운영 중 확폭 방안에 대한 연구가 필수적이다. 따라서 본 논문에서는 기존 노선 급행화에 필요한 부본선 건설을 위해 기존 지하철 터널의 운영 중 확폭 방안에 대한 기초연구를 수행하였다. 기존선 운영 중 부본선 건설방안 모색을 위해 지하철 4호선 과천선의 정부과천청사역을 부본선 건설 가상 역사로 선정하고, 4가지 방안의 구간별 단면 및 공법계획을 검토하였으며, 해당 역사에 대하여 부본선을 시공하였을 경우 시공성·경제성에 비해 상대적으로 안정성이 우려된다고 판단되는 방안을 선정하여 부본선 시공과정을 고려한 3차원 수치해석을 통한 안정성 검토를 수행하였다.

Keywords

References

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