공용 중인 TBM(Tunnel Boring Machine) 터널의 비선형 내진성능 평가
Nonlinear Seismic Performance Evaluation of an Operating TBM(Tunnel Boring Machine) Tunnel
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
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 변수를고려한 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.
Abstract
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.
참고문헌 (15)
- Choi, W. Y., "Influence of the joint stiffness on the segment design", Journal of the Korean Tunneling and Underground Space Association, 16(1), pp.61~72 (2014)
- Gharehdash, S., "Numerical Modeling of the Dynamic Behaviour of Tunnel Lining in Shield Tunneling", KSCE Journal of Civil Engineering, 19(6), pp.1626~1636 (2014)
- vKim, D. S., "Dynamic Deformation Characteristics of Cohesionless Soils in Korea Using Resonant Column Tests", Journal of Korean Geotechnical Society, 17(5), pp.115~128 (2001)
- Seismic Performance Evaluation Guideline for Existing Sturctures(Foundation and Geotechnical Structures), "KISTEC", ~ (2020)
- Seismic Performance Evaluation Guideline for Existing Sturctures(Tunnel), "KISTEC", ~ (2020)
- Advanced TBM tunnelling : theory and practice, "Korean Tunneling and Underground Space Association", ~ (2022)
- Earthquake Resistance Design Regulations for Subway Structures, "Ministry of Land, Infrastructure and Transport", ~ (2018)
- "Ministry of Land, Infrastructure and Transport KDS 14 2020", ~ (2022)
- Pariseau, W. G., "User-friendly finite element design of main entries, barrier pillars, and bleeder entries", ELSEVIER International Journal of Mining Science and Technology, 28(1), pp.3~10 (2018)
- The Hardening Soil Model with small strain stiffness, "Rafal OBRZUD", ~ (2011)
- Yi, G. J., "Deformation of segment lining and behavior characteristics of inner steel lining under external loads", Journal of the Korean Tunneling and Underground Space Association, 26(3), pp.255~280 (2024)
- Z-Soil, "DATA PREPARATION MANUAL", ~ (2020)
- Z-Soil, "THE HARDENING SOIL MODEL – A PRACTICAL GUIDEBOOK", ~ (2020)
- Z-soil, "v20.07 x64", ~ (2020)