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Study on the optimal construction of a concrete lining in a weathered rock

풍화암지반에 시공되는 콘크리트라이닝의 적정시공에 관한 연구

  • 김형건 (서울시 도시기반시설본부 도시철도설계부 경전철설계전문관) ;
  • 이철 (서울시 기술심사담당관 심사총괄팀) ;
  • 이선우 (서울시 도시기반시설본부 도시철도설계부 경전철설계전문관) ;
  • 박준우 (서울시 도시기반시설본부 도시철도설계부 경전철설계전문관)
  • Received : 2015.01.05
  • Accepted : 2015.01.23
  • Published : 2015.01.31

Abstract

Concrete lining in tunnel construction is used as secondary support for downward loads when primary support decays. The use of concrete lining varies greatly depending on the intentions of engineer and/or client. An engineer uses much smaller deformation modulus which determines the concrete lining thickness than of a pattern 3, when supporting patterns 4 and 5 are used in a weathered rock and soil. Considering these conditions, this study intends to suggest optimal construction procedures through a back analysis using a computer program(MIDAS-civil). Cases of Seoul Subway System line${\bigcirc}{\bigcirc}$ zone${\bigcirc}{\bigcirc}$ were selected to be examined for this study. The results show that it is possible to reduce the thickness of concrete lining. When results from this study were applied to Seoul Metropolitan subway construction projects, it is expected to bring economic benefits.

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