한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제28권5호
  • /
  • Pages.1-9
  • /
  • 2024
  • /
  • 2234-6937(pISSN)
  • /
  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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공용 중인 TBM(Tunnel Boring Machine) 터널의 비선형 내진성능 평가

Nonlinear Seismic Performance Evaluation of an Operating TBM(Tunnel Boring Machine) Tunnel

  • 최병일 (국토안전관리원 강원지역본부 기반시설안전실 ) ;
  • 이동하 (국토안전관리원 충청지역본부 기반시설안전실 ) ;
  • 정진우 (국토안전관리원 영남지역본부 기반시설안전실) ;
  • 박시현 (국토안전관리원 상생협력실 )
  • 투고 : 2024.07.08
  • 심사 : 2024.08.12
  • 발행 : 2024.10.31
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초록

최근 수도권 광역급행철도(GTX) 등 도심지 하부 터널굴착이 활발히 진행됨에 따라 TBM 터널 시공법이 각광받게 되었다. TBM 터널은 공사비가 비싼 반면 NATM터널 공법에 비해 상대적으로 소음, 진동에 자유롭기 때문에 기존 도심 하부에 적용하기에 적합한 공법으로 알려져 있다. 특히 지층이 얕은 구간을 통과시 기존 구축된 상부 구조물 및 지장물에 큰 영향을 미칠 수 있으므로 TBM 터널 설계시 다양한 변수를 고려한 정확한 수치해석이 필요하다. TBM터널은 다른 터널 시공공법과 달리 공장에서 제작된 세그먼트를 조립해 라이닝을 구축한다. 세그먼트라이닝은 NATM 터널과 달리 세그먼트간 연결부위가 존재하므로 세그먼크 간의 연결 상태를 어떻게 반영하는지가 해석결과의 신뢰성 확보에 큰 영향을 미칠 수 있다. 따라서 본 논문에서는 도심지 토사지반에 건설된 TBM 터널의 내진해석을 위해 라이닝은 세그먼트 조인트 모델(Janssen Model)을 적용하고, 지반은 도시철도 내진설계기준에 따라 비선형모델을 일부 활용해 수치해석을 수행 후 터널의 거동특성을 분석하였다.

Recently, the TBM tunnel construction method has been in the spotlight as tunnel excavation under urban areas such as the Metropolitan Rapid Transit (GTX) has been actively carried out. Although the construction cost of the TBM tunnel is high, it is relatively free from noise and vibration compared to the NATM tunnel method, so it is well known to be a suitable construction method for application to the lower part of urban areas. In particular, when the stratum passes through the shallow section, it can have a great impact on existing upper structures and obstacles, so accurate numerical analysis considering various variables is required when designing the TBM tunnel. Unlike other tunnel construction methods, TBM tunnels build linings by assembling factory-made segments. Unlike NATM tunnels, segment lining has connections between segments, so how to the connection status between segments is reflected can have a significant impact on securing the reliability of analysis results. Therefore, in this paper, a segment joint model(Janssen Model) was applied to the lining for seismic analysis of the TBM tunnel, and the tunnel's behavioral characteristics were analyzed after numerical analysis using nonlinear models according to urban railway seismic design standards.

키워드

과제정보

본 연구는 '2024년 분당선 선릉~수서간 분당터널 정밀안전진단 및 성능평가' 용역의 지원으로 작성하였습니다.

참고문헌

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