• Title/Summary/Keyword: 피난연결통로

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Installation Standards of Urban Deep Road Tunnel Fire Safety Facilities (도심부 대심도 터널의 방재시설 설치 기준에 관한 연구(부산 승학터널 사례를 중심으로))

  • Lee, Soobeom;Kim, JeongHyun;Kim, Jungsik;Kim, Dohoon;Lim, Joonbum
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.41 no.6
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    • pp.727-736
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    • 2021
  • Road tunnel lengths are increasing. Some 1,300 tunnels with 1,102 km in length had been increased till 2019 from 2010. There are 64 tunnels over 3,000 m in length, with their total length adding up to 276.7 km. Safety facilities in the event of a tunnel fire are critical so as to prevent large-scale casualties. Standards for installing disaster prevention facilities are being proposed based on the guidelines of the Ministry of Land, Infrastructure and Transport, but they may be limited to deep underground tunnels. This study was undertaken to provide guidelines for the spacing of evacuation connection passages and the widths of evacuation connection doors. Evacuation with various spacing and widths was simulated in regards to evacuation time, which is the measure of safety, using the evacuation analysis simulation software EXODUS Ver.6.3 and the fire/smoke analysis software SMARTFIRE Ver.4.1. Evacuation connection gates with widths of 0.9 m and 1.2 m, and spacings of 150 m to 250 m, were set to every 20 m. In addition, longitudinal slopes of 6 % and 0 % were considered. It was determined to be safe when the evacuation completion time was shorter than the delay diffusion time. According to the simulation results, all occupants could complete evacuation before smoke spread regardless of the width of the evacuation connection door when the longitudinal slope was 6 % and the interval of evacuation connection passage was 150 m. When the evacuation connection passage spacing was 200 m and the evacuation connection gate width was 1.2 m, all occupants could evacuate when the longitudinal slope was 0 %. Due to difference in evacuation speed according to the longitudinal slope, the evacuation time with a 6 % slope was 114 seconds shorter (with the 190 m connection passage) than with a 0 % slope. A shorter spacing of evacuation connection passages may reduce the evacuation time, but this is difficult to implement in practice because of economic and structural limitations. If the width of the evacuation junction is 1.2 m, occupants could evacuate faster than with a 0.9 m width. When the width of a connection door is 1.2 m with appropriate connection passage spacing, it might provide a means to increase economic efficiency and resolve structural limitations while securing evacuation safety.

Research on the support system and reinforcement range of cross passage tunnel (피난연결통로터널의 지보패턴 및 보강범위 연구)

  • Jung, Min;Han, Ki-Hwan;Park, Jin-Won;Baek, Kyung-Min;Moon, Hoon-Ki
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.12 no.3
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    • pp.201-213
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    • 2010
  • Recently, plans of tunnel and construction have increased. Unfortunately, the more we have tunnels, the more we have accidents in there. Because an accident or a fire in the tunnel is fatal to user safety, social concerns are focusing on the disaster prevention facilities. Cross passage tunnel is regarded as one of the useful disaster prevention facilities, which is increasing, while there were only few studies about the support system. This study tried to verify whether the support system is appropriate or not with empirical methods-theoretical methods and back analysis using measurement data. Additionally, we also looked into the range of reinforcement in accordance with strength/stress ratio of rock mass.

The study on interval calculation of cross passage in undersea tunnel by quantitative risk assesment method (해저철도터널(목포-제주간) 화재시 정량적 위험도 평가기법에 의한 피난연결통로 적정간격산정에 관한 연구)

  • Yoo, Ji-Oh;Kim, Jin-Su;Rie, Dong-Ho;Shin, Hyun-Jun
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.17 no.3
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    • pp.249-256
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    • 2015
  • Quantitative Mokpo-Jeju undersea tunnel is currently on the basis plan for reviewing validation. As for the cross section shape for express boat of 105 km line, sing track two tube is being reviewed as the Euro tunnel equipped with service tunnel. Also, 10 carriage trains have been planned to operate 76 times for one way a day. So, in this study, quantitative risk assessment method is settled, which is intended to review the optimal space between evacuation connection hall of tunnel by quantitative risk analysis method. In addition to this, optimal evacuation connection hall space is calculated by the types of cross section, which are Type 3 (double track single tube), Type 1 (sing track two tube), and Type 2 (separating double track on tube with partition). As a result, cross section of Type 2 is most efficient for securing evacuation safety, and the evacuation connection space is required for 350 m in Type 1, 400 m in Type 2, and 1,500 m in Type3 to satisfy current domestic social risk assessment standard.

A Study on the Excavation of the Center Wall for the Evacuation Passageway in the Operating 2-Arch Tunnel (운행 중인 2-Arch 터널의 피난연결통로 신설을 위한 중앙벽체 굴착에 관한 연구)

  • Lee, Jong-Hyun
    • Journal of the Society of Disaster Information
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    • v.17 no.3
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    • pp.454-464
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    • 2021
  • Purpose: There is a need to construct an evacuation passageway for the 2-Arch tunnel, which has been constructed and is in operation. Therefore, it aims to analyze tunnel and center wall behaviour and stability due to excavation of the center wall. Method: We describe the theoretical background of 2-Arch tunnel and evacuation passageway, and focused on analyzing the behaviour of tunnel and wall using 3-dimensional finite element analysis. Parametric analysis according to rock rating was performed with various ground conditions, and the displacement and stress of the center wall were intensively analyzed. Result: With the center wall excavation, the largest amount of settlement was shown in the center of the opening, and the stress was greatest during the first excavation. In addition, it was shown that stress concentration occurred at the top of both openings, and stability reviews considering the concept of allowable stress showed that it exceeded the allowable stress. Conclusion: Although the displacement of the tunnel has secured stability within the allowable standard, the generated stress is found to exceed the allowable standard, so it is necessary to prevent sudden stress release by applying appropriate reinforcement methods during construction.

Effects of evacuation delay time and fire growth curve on quantitative risk for railway tunnel fire (철도터널 화재 시 피난개시시간지연 및 화재성장곡선이 정량적 위험도에 미치는 영향)

  • Ryu, Ji-Oh;Kim, Hyo-Gyu;Lee, Hoo-Young
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.20 no.5
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    • pp.809-822
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    • 2018
  • A quantitative risk assessment has been introduced to quantitatively evaluate fire risk as a means of performance based fire protection design in the design of railway tunnel disaster prevention facilities. However, there are insufficient studies to examine the effect of various risk factors on the risk. Therefore, in this study, the risk assessment was conducted on the model tunnel in order to examine the effects of the evacuation start time delay and the fire growth curve on the quantitative risk assessment. As a result of the analysis of the scenario, the fatalities occurred mainly when escapes in the same direction as the direction of the fire smoke movement. In addition, after the FED exceeded 0.3, the maximum fatalities occurred within 10 minutes. In the range of relatively low risk, distance between cross passages, evacuation delay time and fire growth curve were found to affect the risk, but they were found to have little effect on the condition that the risk reached the limit. Especially, in this study, it was evaluated that the evacuation delay time reduction, fire intensity and duration reduction effect were not observed when the distance between cross passages was more than 1500 m.

A study on the development and applicability of fire risk assessment method for small road tunnels passing only small cars (소형차 전용 도로터널의 화재 위험도 평가기법개발 및 적용성에 관한 연구)

  • Ryu, Ji-Oh;Choi, Pan-Gyu
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.20 no.6
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    • pp.917-930
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    • 2018
  • A quantitative risk assessment method for quantitatively evaluating the fire risk in designing a road tunnel disaster prevention facilities has been introduced to evaluate the appropriateness of a disaster prevention facility in a large tunnel through which all vehicle types pass. However, since the quantitative risk assessment method of the developed can be applied only to the large sectional area tunnels (large tunnels), it is necessary to develop a quantitative risk assessment method for road tunnels passing only small cars which has recently been constructed or planned. In this study, fire accidents scenarios and quantitative risk assesment method for small road tunnels through small cars only which is based on the methods for existing road tunnels (large tunnels). And the risk according to the distance between cross passage is evaluated. As a result, in order to satisfy the societal risk assessment criteria, the distance of the appropriate distance between cross passages was estimated to be 200 m, and the effect of the ventilation system of the large port exhaust ventilation system was quantitatively analyzed by comparing the longitudinal ventilation system.

A study on design and performance test of fire door with high endurance performance in submarine tunnel (고내구성능을 갖는 해저터널 방화문 설계방안 및 성능시험 연구)

  • Park, Sang-Heon;Hwang, Ju-Hwan;Choi, Young-Hwan;An, Sung-Joo;Yoo, Yong-Ho
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.20 no.2
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    • pp.331-346
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    • 2018
  • In the tunnel of domestic high - speed railway, the main fire - fighting facility, fire - extinguishing passageway, is installed. However, due to the high pressure of the high - speed train, frequent breakage and maintenance are caused by strong shock and long - term vibration. In order to solve these problems, it is necessary to improve the fire door, but in Korea, it is installed by submitting a certificate by simple KS F 2296 performance test. At present, it is developed as a simple test certification by producing a real scale fireproof door without the theoretical examination in advance, so that a high cost for improvement is occurring in Korea. Therefore, through this study, structural analysis study which can preliminary structure review was carried out in order to design the refuge connection passage fire door and to improve the performance improvement. In order to secure the reliability of the result value, the official authentication test (KS F 2296) were compared.

A study on the architectural planning of intelligent tall buildings (인텔리전트 초고층 빌딩의 건축환경계획)

  • 김일권
    • The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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    • v.28 no.3
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    • pp.186-195
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    • 1999
  • 필자가 재작년 초고층 건축견학을 위해 동경을 방문한 적이 있었다. 오페라 시티를 견학하던 중 갑자기 지진이 일어나 방송이 나오고 있었는데 "지금 일어난 지진의 강도가 얼마이고 빌딩이 견딜 수 있는 범위 안에서 지진이 일어난 것이기 때문에 대피할 필요가 없으니 안심하라"는 내용이었다. 그리고 "엘리베이터는 운행 중 지진이 일어날 때 가장 가까운 층에 이용자를 내릴 수 있도록 하며 지진이 끝날 때까지 완벽하게 통제되어 멈춰있다"고 했다. 지진이 지나간 이후 장내는 전과 다름없이 평온하였다. 그리고 포디움 부분의 연결통로를 지날 때 벽면 사이에서 나는 각종 새소리는 마치 숲속에서 거닐고 있는 것처럼 느낌이 들게 하였다. 이와 같이 완벽한 피난과 방재에 대한 시스템에서부터 보행자를 위한 어메니티 확보 등 거주자의 안전에서 쾌적함에 이르기까지 세심한 배려가 건물곳곳에 배어 있었다.

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