• Magazine of korean Tunnelling and Underground Space Association
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• v.19 no.3
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• pp.23-27
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• 2017

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1998.05a
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• pp.215-220
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• 1998

터널공사에서는 지산의 강도에 따라 선정된 굴착공법을 이용하여 굴착 된 단면에는 굴삭된 터널의 안전과 시공상 능률을 증진시키고, 장기간에 걸친 터널의 사용에 대한 충분한 신뢰성을 갖추기 위하여 지지공$\cdot$라이닝콘크리트 등이 설치된다. (중략)

• Journal of Korean Tunnelling and Underground Space Association
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• v.20 no.1
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• pp.197-209
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• 2018

This paper presents a study on the reduction of concrete lining re-bar according to the tunnel design factors. The design of the concrete lining increases the reinforcing re-bar according to the application of excessive load, and the economical efficiency is reduced. In order to improve the economical efficiency of tunnel construction, rational standards are required for the design factors of concrete lining. Therefore, this research analyzed the characteristics and problems of the design factors applied to the design of concrete lining. Also, the economical review of the concrete lining for design factor application was compared with the amount of reinforcing re-bar calculated from the section design using numerical analysis. The results show that the amount of re-bar is varied according to the design factors. That is, the required amount for re-bar in the tunnel concrete lining could be reduced in the design stage. The results of this study may be useful for economic design of concrete lining in the future.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2009.04a
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• pp.506-512
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• 2009

최근 건설 중인 금정터널(총 연장 20.3km)이나 부산-거제간 침매터널은 화재 발생시 구조체의 강도저하로 인한 붕괴 및 사회기반시설인 교통망을 장시간 끊어놓은 등 큰 피해를 야기시킬 수 있다. 이러한 초장대터널이나 침매터널은 다른 터널보다 밀폐된 공간이므로 화재 시 단시간에 급격하게 온도상승이 일어날 수 있으며 이로 인해 구조물의 주재료인 콘크리트의 폭렬이 발생하고 구조물 내부까지 고온이 전달되어 경우에 따라 구조체의 붕괴의 원인이 되기도 한다. 따라서 본 연구에서는 콘크리트 구조체의 내화성능을 확보하기 위해 유럽에서 사용되고 있는 터널내화용 보드와 모르타르를 적용한 콘크리트의 내화성능 확보방안을 위한 시험을 수행하였다. 실험에 대한 내화성능 평가는 ITA(International Tunneling Association)에서 정한 화재 손상범위를 평가기준으로 하였고 터널화재 시나리오는 네덜란드의 TNO에 의해 실행된 실험결과를 따른 RWS 화재곡선을 이용하여 수행하였다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.3 s.55
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• pp.110-118
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• 2009

The tunnel structure is widely used for transportation in the mountain area. To reduce the duration of construction and thus the expense, a tunnel excavation is often performed simultaneously with a tunnel lining in in-situ. However, cracking of the tunnel lining may occur arising from the vibrating impact in the excavation process. The present study concerns the role of steel fiber and nylon fibers in tunnel lining concrete to reduce the vibrating impact. As a result it was found that both the nylon fiber and steel fiber improved the durability and physical properties of concrete.

• Journal of Korean Tunnelling and Underground Space Association
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• v.25 no.2
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• pp.121-139
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• 2023

Various tunnels such as road, subway, and railway are under construction and operation. Various types of linings are used for structural stability of tunnel structures, and concrete segment linings are mainly installed in TBM tunnel construction. In this paper, when a fire occurs in a tunnel, the impact on the concrete segment lining, which is the structure in the tunnel, and related standards, fire resistance evaluation and fire resistance method are investigated through literature review and related contents are presented. Through this, it is intended to provide an information for practitioners to secure the safety of concrete segment linings against tunnel fires.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.485-488
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• 2008

Fire intensity in tunnel fire is very severe, which might cause the spalling on the surface of shotcrete and concrete lining exposed to the heat as well as rapidly-reducing stress due to heat transfer by steel material such as anchor embedded in tunnel which plays the critical role in securing the stability of the tunnel. In this study, a fire test to identity the heat intensity(Modifired Hydrocarbon Curve) and the fire resistance of steel materials embedded as parameters, was carried out. And the evaluation to identify the thermal damage, which was based on critical temperature range for thermal damage of steel materials determined according to the road tunnel fire resistance standard established by ITA(International Tunneling Association).

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.201-206
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• 2011

최근 국내에서는 대심도 터널 시공계획이 발표되면서 터널 구조물에 대한 방재 및 내화설계에 대한 관심이 높아지고 있다. 화재 발생 시 문제가 발생할 수 있는 콘크리트 라이닝의 내화설계를 위해서는 보다 구체적인 내화성능을 측정하기 위한 내화실험이 실시되어야 한다. 현재 국내에서는 건축물의 내화성능을 평가하기 위한 시험평가 방법이 제시되어 있는 상태이나 터널 구조물에 대한 시험법이나 성능평가는 거의 전무한 상황이다. 따라서 본 연구에서는 콘크리트 구조물의 화재손상 정도를 평가하기 위해 현장에서 사용되고 있는 터널 라이닝을 대상으로 화재 시 콘크리트 라이닝의 손상정도를 평가하였다. 실험은 대표적인 터널 화재시나리오 곡선인 RABT 화재 시나리오를 적용하였으며 폭렬방지에 효과적인 것으로 알려져있는 fiber cocktail(강섬유+폴리프로필렌섬유)의 혼입여부에 따른 성능평가도 함께 실시하였다.

• Journal of the Korean Society for Railway
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• v.17 no.6
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• pp.410-414
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• 2014

In this study, the behavior of urban subway tunnels is measured using instrumentation sensors installed in the lining concrete inside subway tunnels in order to analyze their behavior according to temperature variations. It is observed that the stresses of the concrete lining, tunnel convergence, and cracks change according to the temperature variations. However, the crack deformation differs depending on the size and status of the crack. In addition, this study proposes a correction formula for the lining stress and tunnel convergence through numerical analyses of the concrete lining according to the temperature variations. The results of this research can be used in the tunnel maintenance considering the tunnel behavior depending on the temperature variations in the tunnel.

• Tunnel and Underground Space
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• v.11 no.2
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• pp.96-108
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• 2001

A concrete lining of NATM tunnel is the final product of a process that involves planning and evaluation of user needs, geotechnical investigations, analysis of ground-lining interaction, construction, and observations and modifications during construction. The designer must consider the lining in context of the many function, construction, and geotechnical requirements. Also, the loss of supporting capacity of shotcrete lining due to poor rock qualities and shotcrete erosion must be considered. The values, shapes, and estimating methods of rock load and water pressure are very different with every designers. Estimating methods of rock loads used in the design of NATM tunnel concrete lining are investigated. Structural analyses are done in various load combinations, and the member forces(moment, axial force and shear force) are compared. The adequate load combination of rock load and water pressure is proposed.