为探究四车道特大断面隧道横向多火源火灾下拱顶最高温度变化特性,以龙泉山一号四车道特大断面隧道为研究对象,开展隧道火灾模型试验,研究横向多火源火灾场景下火源数量及总功率对隧道拱顶最高温度的影响。结果表明:在多火源火灾条件下,隧道拱顶最大温升速率显著高于单火源火灾场景;拱顶最高温度随火源数量递增而显著增长,但其增幅逐步减小;与现有单火源火灾拱顶最大温升计算模型相比,横向多火源火灾拱顶最大温升实测值明显更高;根据试验数据,提出了四车道特大断面隧道横向多火源火灾拱顶最大温升计算模型。
To investigate the variation regularities of maximum temperature in transverse multi-source fire scenarios within four-lane mega-section tunnels, taking the Longquan Mountain No. 1 four-lane mega-section tunnel as the research object, tunnel model tests are conducted, and the influences of the number and total power of fire sources on the maximum temperature of tunnel arches in horizontal multi-fire scenarios are studied. The results indicate that: the maximum temperature rise rate of the tunnel arch is significantly higher than that of a single fire source fire scenario; The maximum temperature of the arch increases significantly with the increase of the number of fire sources, while the increasement gradually decreases; Compared with the existing calculation model for the maximum temperature rise of the vault in single fire source fires, the measured maximum temperature rise of the vault in horizontal multi-source fires is significantly higher; Based on experimental data, a calculation model for the maximum temperature rise of the transverse multi-source fires vault in a four-lane mega-section tunnel was proposed.
[1] 赖金星,周慧,程飞,等.公路隧道火灾事故统计分析及防灾减灾对策[J].隧道建设,2017,37(4):409-415.
[2] 韩颖,李靖.2014年重特大事故写真[J].劳动保护,2015(2):54-55.
[3] Li Y Z,Ingason H.The maximum ceiling gas temperature in a large tunnel fire[J].Fire Safety Journal,2012,48:38-48.
[4] 陶亮亮,张逸敏,刘振撼,等.无纵向风下环境压强对拱顶最高温度影响数值研究[J].隧道建设(中英文),2020,40(6):827-832.
[5] 郭庆华,闫治国,张耀,等.自然通风下公路隧道火灾拱顶温度分布研究[J].现代隧道技术,2020,57(增1):667-675.
[6] 胡嘉伟,毛军,刘斌,等.隧道内横向偏置火源火灾烟气温度特性全尺寸试验研究[J].中国公路学报,2020,33(11):205-214.
[7] 高子鹤.隧道内受限火羽流行为特征及竖井自然排烟机理研究[D].合肥:中国科学技术大学,2016.
[8] 陈长坤,王玮玉,康恒,等.不同火源面积下隧道火灾温度场试验与数值模拟分析[J].中国公路学报,2018,31(6):235-243.
[9] He K,Cheng X,Yao Y,et al.Characteristics of multiple pool fires in a tunnel with natural ventilation[J].Journal of Hazardous Materials,2019,369:261-267.
[10] 孟娜,杜晓燕.隧道内非对称双火源火焰特性及顶棚烟气最高温度研究[J].安全与环境学报,2024:1-9.
[11] Zhang Y,Xing S,Chen R,et al.Experimental study on maximum temperature beneath tunnel ceiling under the condition of double fire sources[J].Tunnelling and Underground Space Technology,2020,106:103624.
[12] 陈荣芳,郭志国,刘祖文,等.隧道不同横向偏距的双火源燃烧行为与温度分布[J].清华大学学报(自然科学版),2024,64(9):1608-1616.
[13] Li L,Du F,Yang Y,et al.Research on the smoke mass flow rate in one-dimensional spreading stage in tunnel with multiple fire sources[J].Case Studies in Thermal Engineering,2022,31:101801.
[14] 蒋星润,刘红兵,李文睿,等.岩后隧道火灾内部特征温度影响范围研究[J].消防科学与技术,2022,41(5):594-598.
[15] PIARC Committee on Road Tunnels.Fire and smoke control in road tunnels[R].Paris,1999.
[16] 上海市政工程设计研究总院有限公司.城市地下道路工程设计规范(CJJ 221-2015)[S].北京:中国建筑工业出版社,2015.
[17] 中华人民共和国交通运输部.公路隧道通风设计细则(JTG/T D70/2-02—2014)[S].北京:人民交通出版社,2014.
[18] Hu L H,Huo R,Peng W,et al.On the maximum smoke temperature under the ceiling in tunnel fires[J].Tunnelling and Underground Space Technology,2006,21(6):650-655.
[19] 王明年,于丽,赵勇,等.铁路隧道防灾救援技术[M].北京:科学出版社,2017.
[20] 王峰,黄玉冰,朱磊,等.超高海拔隧道火灾燃烧与烟气温度现场模型试验研究[J].土木工程学报,2020,53(3):114-120.
[21] Wang F,Dai K,Liang S,et al.Experimental field study on smoke characteristics and CO concentration of high-altitude tunnel fires induced using gasoline and diesel[J].International Journal of Thermal Sciences,2023,194:108559.
[22] Li Y Z,Lei B,Ingason H.The maximum temperature of buoyancy-driven smoke flow beneath the ceiling in tunnel fires[J].Fire Safety Journal,2011,46(4):204-210.
[23] He K,Li Y Z,Ingason H,et al.Experimental study on the maximum ceiling gas temperature driven by double fires in a tunnel with natural ventilation[J].Tunnelling and Underground Space Technology,2024,144:105550.
[24] Zhao J,Cui X,Yao Y,et al.The burning process and temperature profile of double fires in a tunnel:An experimental study[J].Tunnelling and Underground Space Technology,2022,125:104500.
[25] Experimental study on ceiling gas temperature and flame performances of two buoyancy-controlled propane burners located in a tunnel[J].Applied Energy,2017,185:573-581.
