首页|钢壳沉管隧道耐火极限标准与防火保护技术研究——以深中通道沉管隧道为例

钢壳沉管隧道耐火极限标准与防火保护技术研究——以深中通道沉管隧道为例

Fire Resistance Limit Standard and Fire Protection Technology of Steel Shell Immersed Tunnel:A Case Study of Shenzhen-Zhongshan Link Immersed Tunnel

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为提高我国超大断面钢壳沉管隧道火灾防控水平,以深中通道海底沉管隧道为例,采用热力耦合模拟和材性试验等方法开展钢壳沉管隧道耐火极限标准研究,考虑到龙骨、拼缝等防火构造薄弱环节,进行管节结构和管节接头耐火试验,并提出相应的防火保护技术方案.主要结论如下:1)管节结构的耐火极限标准为火灾时,应将结构内侧钢壳最高温度控制在 300℃以内;2)OMEGA橡胶管节接头的耐火极限标准为OMEGA橡胶超过70℃的时间小于2 h,超过100℃的时间小于1 h,且最高温度不得超过150℃;3)GINA橡胶管节接头的耐火极限标准为GINA橡胶超过 100℃的时间小于 1 h,且最高温度不得超过 150℃;4)管节结构可采用 35 mm单层防火板L型拼缝,对接面涂热膨胀胶;5)管节接头可采用 35 mm防火板+50 mm陶瓷纤维毯双层防火保护体系,龙骨自由端取 500 mm,拼缝处采用防火胶封堵.
To improve the fire prevention and control level of super-large section steel shell immersed tunnels in China,a case study is conducted on the Shenzhen-Zhongshan link immersed tunnel and the fire resistance limit standard of the tunnel is studied using thermal-mechanical coupling simulation and material property test.When conducting the fire resistance test of the pipe joint structure and pipe joint,the weak links of the fire prevention structures,such as keel and seam,are considered and the corresponding fire protection technical scheme is introduced.The main conclusions are as follows:(1)The maximum temperature of the inner steel shell of the structure should be controlled within 300℃ in case of a fire.(2)The time for OMEGA rubber under 70℃ and 100℃ shall not exceed 2 and 1 h,respectively,and the maximum temperature shall not exceed 150℃.(3)The time for GINA rubber under 100℃ shall not exceed 1 h,and the maximum temperature shall not exceed 150℃.(4)The pipe joint structure can use a 35-mm-thick single-layer fireproof board and an L-shaped joint,and the joint surface is coated with a thermal expansion adhesive.(5)The pipe joint can adopt a double-layer fire protection system with a 35-mm-thick fireproof board and a 50-mm-thick ceramic fiber blanket.The free end of the keel is 500 mm,and the joints are sealed using fireproof glue.

Shenzhen-Zhongshan linkimmersed tunnelsteel shell-concrete structurefire resistance limitfire resistance testfire protection scheme

吴梦军、吴庆良、宋神友、曹鹏

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招商局重庆交通科研设计院有限公司,重庆 400067

公路隧道国家工程研究中心,重庆 400067

西南大学工程技术学院,重庆 400715

深中通道管理中心,广东 中山 528400

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深中通道 沉管隧道 钢壳混凝土结构 耐火极限 耐火试验 防火保护

国家重点研发计划项目国家重点研发计划项目重庆市自然科学基金

2018YFC08096002018YFC0809603CSTB2022NSCQ-MSX1656

2024

10.3973/j.issn.2096-4498.2024.02.004

隧道建设(中英文)
中铁隧道集团有限公司洛阳科学技术研究所

隧道建设(中英文)

CSTPCD北大核心
影响因子：0.785
ISSN：2096-4498
年,卷(期)：2024.44(2)
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