• Magazine of korean Tunnelling and Underground Space Association
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• v.3 no.4
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• pp.24-28
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• 2001

• Magazine of korean Tunnelling and Underground Space Association
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• v.23 no.2
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• pp.63-78
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• 2021

• The Safety technology
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• no.160
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• pp.12-14
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• 2011

대전 서남부 지역 주거환경 개선을 위해 도안신도시가 한창 개발주인 가운데 일부 아파트는 벌써 입주가 완료되면서 신도시로서의 면모가 차츰 갖춰지고 있다. 이 시기에 맞춰 교통의 흐름을 원활히 하기 위한 터널공사와 교야 공사도 함께 분주히 진행되고 있다. 오늘 찾은 현장이 바로 터널공사와 교량고사를 담당하고 있는 계룡건설 대전도안지구 동서대로 건설현장(현장소장 이기욱)이다. 총 연장 1.82km의 편도 4차선터널과 3백여미터의 교량 건설이 한창인 이 곳은 중장비가 연신 들락거리는 가운데 각종 차량과 인력이 유기적으로 들어가며 안전시공, 무재해 시공에 연염이 없다. "신바람 나게 즐기면서 재미있게" 일을 하고 있는 계룡건설 대전도안지구 동서대로 건설현장(이하 동서대로 현장)을 찾아 이들만의 안전 이야기를 들어 봤다.

• Journal of Korean Tunnelling and Underground Space Association
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• v.11 no.4
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• pp.411-417
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• 2009

The thermo-flow field in road tunnel is influenced by some facts such as piston effect of vehicle's move, operation of ventilation facilities, natural wind and buoyancy effect of fire plume. Among those, piston effect is one of primary causes for formation of air flow in road tunnel and has an effect on initial direction of smoke flow in tunnel fire. In this study to analyze the unsteady flow in the tunnel caused by the run of vehicle, the experimental study of vehicle-induced unsteady flow on a reduced-scale model tunnel is presented. While the three types of vehicle shape such as basic type of rectangular shape, diamond-head type and stair-tail type are changed, the pressure and air velocity variations with time are measured. The rising ratio of pressure and velocity are in order of "basic type of rectangular shape > stair-tail type > diamond-head type". The experimental results would be good data for development of a numerical method on the vehicle-induced unsteady tunnel flow.

• Journal of Korean Tunnelling and Underground Space Association
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• v.25 no.6
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• pp.525-540
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• 2023

Because of a new seismic design code has been enacted in 2023, there is a need to evaluate whether the road tunnels in operation satisfies the requirements of the new code. Four tunnels that are considered to be most susceptible to damage. Time history analyses are performed to quantify their seismic performances. The input ground motions generated to fit both 2007 and 2023 codes are used to evaluate the effect of the motions on the calculated responses. The analyses show that all tunnels perform favorably and satisfies the requirements successfully. Therefore, retrofit or reinforcement are deemed as unnecessary.

• Proceedings of the KSEG Conference
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• 2002.04a
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• pp.137-146
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• 2002

수락산 터널구간 기반암의 평균투수계수는 $2.64{\times}10^{-6}cm/sec$, 평균RQD는 78%, 평균공극율 은 0.51% 이다. 지하수위와 표고간의 상관성분석을 이용하여 수락산 정상부에서 지하수위를 추정한 결과, 터널구간의 전체 평균수리경사는 0.267로서 산출되었다. 수리분석에 의한 수락산 터널구간에서의 지하수 유출량은 약 $66,378~121,574\textrm{m}^3/yr$, 함양량은 $863,500\textrm{m}^3/yr$로 산정 되었다. 3차원 지하수유동모델링 소프트웨어 MODFLOW를 이용하여 터널건설에 의한 지하수위 변동을 분석한 결과, 1년 후에는 터널 중심부에서의 지하수위 강하가 각각 40~45m로 나타났으며 터널구간의 지하수위는 3년 후에, 그리고 모델 영역 전체 지하수위는 4,5년 후에 완전하게 정류상태로 회복되었다.

• Tunnel and Underground Space
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• v.33 no.6
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• pp.445-471
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• 2023

Long-term safety over millennia is the top priority consideration in the construction of disposal sites. However, ensuring the mechanical stability of deep geological repositories for spent fuel, a.k.a. radwaste, disposal during construction and operation is also crucial for safe operation of the repository. Imposing restrictions or limitations on tunnel support and lining materials such as shotcrete, concrete, grouting, which might compromise the sealing performance of backfill and buffer materials which are essential elements for the long-term safety of disposal sites, presents a highly challenging task for rock engineers and tunnelling experts. In this study, as part of an extensive exploration to aid in the proper selection of disposal sites, the anticipation of constructing a deep geological repository at a depth of 500 meters in an unknown state has been carried out. Through a review of 2D and 3D numerical analyses, the study aimed to explore the range of properties that ensure stability. Preliminary findings identified the potential range of rock properties that secure the stability of central and disposal tunnels, while the stability of the vertical tunnel network was confirmed through 3D analysis, outlining fundamental rock conditions necessary for the construction of disposal sites.

• Magazine of korean Tunnelling and Underground Space Association
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• v.23 no.1
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• pp.14-25
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• 2021

• Magazine of korean Tunnelling and Underground Space Association
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• v.24 no.1
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• pp.22-28
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• 2022

• 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