# 논문 취소: 터널형 구조물의 방재시설 가동에 따른 화재연기 거동에 관한 수치 해석적 연구

• Accepted : 2018.12.28
• Published : 2019.01.31

#### Abstract

In this study, behaviors of fire smoke in the operation of disaster prevention facilities (smoke damper, jet fan) in a tunnel-type structure (soundproof tunnel) were investigated numerically and results of the investigation were compared and analyzed. Through the simulation and analysis, it was found that there was a significant change in the patterns of fire smoke between the opening of the ceiling of a fire vehicle and the closing, and it was shown that the critical temperatures of PC and PMMA, main materials of a soundproof tunnel were not exceeded. In addition, the simulation of installation intervals of smoke dampers showed that the maximum temperature of a soundproof tunnel without smoke dampers was $552^{\circ}C$ while it reached $405^{\circ}C$ when smoke dampers were installed at the installation interval of 50 m. The simulation of the operation of a jet fan showed that the maximum temperature of a soundproof tunnel without a jet fan was $549^{\circ}C$ while it reached only $86^{\circ}C$ when a jet fan was operating. Therefore, it is highly expected that they could create a favorable environment for evacuation and protection of soundproofing materials, and it would be necessary to promote basic studies on tunnels serving various functions and purposes.

#### File

Fig. 1. Grade distribution of expressway tunnels and soundproof tunnels

Fig. 2. Simulation case domain

Fig. 3. Temperature distribution by opening the ceiling to material

Fig. 4. Results of simulation - Effect of opening of the ceiling of a soundproof tunnels

Fig. 5. Results of simulation - Effect of exhaust damper installation

Fig. 6. Results of simulation - Effect of exhaust damper installation

Fig. 7. Results of simulation - Effect of smoke control system (jet-fan) operation

Fig. 8. Temperature distribution to smoke control system (jet-fan) operation

Table 1. Grade distribution of expressway tunnels and soundproof tunnels

Table 2. Boundary condition

Table 3. Simulation case

Table 4. Maximum diffusion distance of CO

#### Acknowledgement

Grant : 대심도 복층터널 설계 및 시공 기술개발

Supported by : 국토교통과학기술진흥원

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