沉管隧道结构耐火保护技术数值模拟研究

Numerical simulation study on fire protection technology for immersed tunnel structure

沉管隧道由于其结构特殊性,空间密闭,存在管节及节段接头,一旦发生火灾,给人员安全带来威胁的同时也会对隧道结构造成严重破坏。本文从数值模拟方面,分别针对沉管隧道局部1∶1结构、管节接头,在RABT升温曲线下,不同厚度防火板保护下模拟受火2h,进行了模拟计算,并对计算结果分析,通过分析可为以后相关科研及实际应用提供参考。

Due to its structure feature in pipe joint and segment joint and space confined, in tile event of fire, it poses a threat to the safety of the people and causes serious damage on the tunnel structure. In this paper, the calculation model for immersed tunnel structure of refractoriness protection is designed. Then the simulation results are analyzed for the local 1 ： 1 structure and the joints of the pipe joints under the RABT curve with the protection of different thickness fireproof board for 2 hours. This article puts forward some practical suggestions for the practical project and also can provide a references for the related the research and the application.