• Magazine of korean Tunnelling and Underground Space Association
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• v.9 no.4
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• pp.33-36
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• 2007

• Magazine of korean Tunnelling and Underground Space Association
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• v.13 no.5
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• pp.50-59
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• 2011

• Magazine of korean Tunnelling and Underground Space Association
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• v.25 no.1
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• pp.36-44
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• 2023

• Tunnel and Underground Space
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• v.27 no.4
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• pp.195-204
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• 2017

This case study introduces the construction of large cross section tunnel for underground ventilation system in Sillim-Bongcheon Tunnel Project. In order to grant the safety and efficiency in connecting the ventilation shaft (7.8 m of width, and 6.6 m of height) to a tunnel for axial fan facility (20.8 m of width, and 12.3 m of height), gradual enlargement of tunnel cross section was employed between those and temporary support method was determined based on Q system. In addition, some original designs were revised during construction stage to improve the efficiency of excavation in large cross section tunnel. The advance length was optimized and top heading of the tunnel was excavated without partition in accordance with ground condition and numerical stability analysis results. It is believed that some experiences and considerations in this case study will be useful for the future design and construction in similar large cross section tunnel such as large underground ventilation system or road tunnel with four lanes.

• Magazine of korean Tunnelling and Underground Space Association
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• v.1 no.2
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• pp.161-170
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• 1999

본고에서는 $1986.8\~1988.7$월중에 시공된 부산지하철 1호선 3단계 건설구간 중 서대신동 로타리에서 괴정국민학교 앞까지 연${\cdot}$경암지역에서의 TBM(Tunnel Boring Machine)으로 시행된 단선터널(7.0m)과 NATM으로 시행한 복선터널의 근접시공에 따른 간벽부 보강설계 내용과 근접부 시공시 계측결과 분석, 지보 Pattern조정 및 시공 실적 등을 제시하였다. 원설계 내용 분석 결과 지보 Pattern이 현장 지반조건에 비해 과다하였고 TBM 굴진시 Thrust 2500kN(본 기계 기준) 이상인 연암이상의 지반에서는 TBM 굴착으로의 효율성이 있었고, 경암구간에서 병행터널의 간섭영향을 배제하려면 터널간의 중심거리가 터널직경의 2배 이상이 되어야 하며, TBM 단선터널(7.0m)의 일 평균 굴진 길이는 4.6m로 분석되었다. 앞으로 이와 유사한 암층에서의 터널근접 시공 및 TBM 굴착시 본 분석내용이 참고가 되기를 기대하여 본고를 작성하였다.

• Magazine of korean Tunnelling and Underground Space Association
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• v.12 no.2
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• pp.84-90
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• 2010

• Magazine of korean Tunnelling and Underground Space Association
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• v.3 no.2
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• pp.63-67
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• 2001

최근 구조물의 안전과 관련하여 계측기술에 대한 관심이 고조되고 있으며, 시공중 계측 뿐 아니라 시공후 유지관리를 위한 구조물의 계측 사례가 증대되고 있다. 본 고에서는 영구계측을 위하여 고속철도용 터널에 적용된 유지관리 계측시스템을 소개함으로써 추후 터널의 유지관리 계측시스템을 구축하는데에 기초적인 자료를 제시하고자한다.

• Magazine of korean Tunnelling and Underground Space Association
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• v.9 no.2
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• pp.28-34
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• 2007

• Journal of Korean Tunnelling and Underground Space Association
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• v.24 no.6
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• pp.725-744
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• 2022

As the construction of infrastructure using the underground tunnel in urban area have been rapidly increased, various accidents and collapses of tunnel including structure have been occurred in deep urban tunnelling. The concern and worry relating to the risk and safety of the tunnel during excavation is becoming the key issues in deep urban tunnelling. In this study, it was conducted for deep urban tunnel at GTX (Great Train Express) line which was located in Seoul metropolitan area to determine the risk characteristics for tunnel according to urban tunnelling. Also, it was reviewed the risk analysis and evaluation of the tunnel, shaft and station. And after a review of risk analysis and evaluation for risk register and hazard identification by using a risk matrix method, safety management of the tunnel according to excavation was evaluated to be secured. This study is expected to be applied as useful approach in deep urban tunnelling if you need to review the risk and safety management system of tunnel according to mitigation measures in complex urban tunnelling.

• Journal of Korean Tunnelling and Underground Space Association
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• v.8 no.4
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• pp.307-324
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• 2006

Effects of new tunnel construction on an existing tunnel are investigated in this paper. A parametric study was conducted on a number of conditions in terms of relative location of the new tunnel to the existing tunnel using 2D and 3D finite element models. The results indicated that the new tunnel construction imposes most severe effect on the existing tunnel's lining when located below the existing tunnel's springline for cases in which the new tunnel is constructed parallel to the existing tunnel. It is also revealed that the effect to the new tunnel construction is larger when the new tunnel is constructed under the existing tunnel than above for cases in which the new tunnel is crossed with the existing tunnel. Practical implications of the finding are discussed.