Stability Analysis of Concrete Liner installed in a Compressed Air Storage Tunnel

압축공기 저장용 터널에 설치된 콘크리트 라이닝의 안정성 해석

  • 이연규 (군산대학교 해양건설공학과) ;
  • 박경순 (군산대학교 대학원 해양산업공학과) ;
  • 송원경 (한국지질자원연구원 지구환경연구본부) ;
  • 박철환 (한국지질자원연구원 지구환경연구본부) ;
  • 최병희 (한국지질자원연구원 지구환경연구본부)
  • Published : 2009.12.31

Abstract

The stability assessment of a concrete liner of a compressed air storage tunnel should be performed by an approach which is different from that commonly used for the liners of road tunnels, since the liner is exposed to high air pressure. In this study, the stability analysis method for the liner of compressed air storage tunnel is proposed based on the elastic and elasto-plastic solutions of the thick-walled cylinder problem. In case of elastic analysis, the yield initiation condition at the inner boundary is considered as the failure condition of the liner, while the condition which results in the extension of yielding zone to a certain depth is taken as a failure indicator of the liner in the elasto-plastic analysis taking Mohr-Coulomb criterion. The application of the proposed method revealed that the influence of the relative magnitude of boundary loads on the stability of liner is considerable. In particular, noting that the estimation of the outer boundary load may be relatively difficult, it is thought that the precise prediction of outer boundary load is very important in the analysis. Accordingly, the emphasis is put on the selection of the liner installation time, which may govern the magnitude of outer boundary load.

Keywords

Compressed air storage;Concrete liner;Elasto-plastic analysis;Mohr-Coulomb yield condition

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