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Title |
Risk Assessment on TBM(Tunnel Boring Machine) Tunnel Lining Backside Cavity Size
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Authors |
최병일(Byoung-Il Choi) ; 이상영(Sang-Young Lee) ; 송건호(Keon-Ho Song) ; 심윤태(Yun-Tae Sim) ; 박세준(Se-Jun Park) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.6.153 |
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Keywords |
TBM 터널; 공동; 회전각; 세그먼트라이닝 TBM Tunnel; Cavity; Rotation Angle; Segment Lining |
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Abstract |
In Korea, ground subsidence accidents are occurring in the upper layers during tunnel construction. Such as the Bujeon-Masan double-track railway and the Shinansan Line in the metropolitan area. For various reasons, The initial collapse occurred inside the tunnel due to the internal lining being unable to withstand the load, and ground subsidence occurred as a result of the failure to support the upper stratum. As a result of domestic and foreign tunnel accidents analysis, it was found that most accidents occur during tunnel construction and the main reason is the load acting on the back of the tunnel lining. In general, when designing for urban tunnel construction, the design should be carried out a properly considering the load on the tunnel, and construction will be necessary considering high-quality materials and construction procedures. In this paper, risk assessment was conducted according to the cavity size at the back of the segment lining for TBM tunnel which is mainly applied when constructing tunnels under the metropolitan area passing of the city.
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