Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Estimation of subsea tunnel stability considering ground and lining stiffness degradation measurements

지반 및 라이닝 열화 계측 정보를 반영한 해저 터널의 안정성 평가

  • An, Joon-Sang (INHA University, Dept. of Civil Engineering) ;
  • Kim, Byung-Chan (HANYANG University, Dept. of Natural Resources and Environmental Engineering) ;
  • Moon, Hyun-Koo (HANYANG University, Dept. of Natural Resources and Environmental Engineering) ;
  • Song, Ki-Il (INHA University, Dept. of Civil Engineering)
  • 안준상 (인하대학교 토목공학과) ;
  • 김병찬 (한양대학교 자원환경공학과) ;
  • 문현구 (한양대학교 자원환경공학과) ;
  • 송기일 (인하대학교 토목공학과)
  • Received : 2016.08.12
  • Accepted : 2016.09.02
  • Published : 2016.09.30
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Abstract

Efficiency for estimation of subsea tunnel safety can be increased through reflecting back analysis algorithm to displacement measurements besides other measurement information such as stress, water pressure and ground stiffness degradation. In this study, the finite difference code FLAC3D built-in FISH language is used. In addition, the stability of the tunnel lining will be evaluated from the development of displacement-based algorithm and its expanded algorithm with conformity of several parameters such as stress measurements, water pressure measurements, tunnel lining degradation measurements and ground stiffness degradation measurements. By using additional measurement information to assess the stability of subsea tunnel, it was confirmed that the error rate is reduced to the tunnel back analysis.

해저 터널의 안정성 평가는 계측 변위 이외에도 응력, 수압 그리고 지반강성(열화) 등 다른 계측 정보를 사용해서 역해석 알고리즘에 반영하면, 그 효율성이 증대될 수 있다. 본 연구에서는 FLAC3D 프로그램에 내장된 FISH 언어를 사용해서, 기 구축된 변위-응력 기반의 차분진화 알고리즘을 수정 및 확장하였다. 확장된 차분진화 알고리즘에는 변위, 응력 정보 외에도 수압 및 지반 및 라이닝 열화 정보도 입력 인자로 사용되었다. 해저 터널 안정성 평가에 추가적인 계측 정보를 활용하면, 터널 역해석에 대한 오차율이 감소함을 확인할 수 있었다.

Keywords

References

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