钢壳结构沉管隧道防火保护技术

Fire protection technology of caisson tunnel with steel shell structure

介绍沉管隧道防火保护需求及国内外有关技术规范标准。通过RABT升温曲线耐火测试,发现现有隧道防火涂料、隧道防火板产品在钢壳结构沉管隧道防火保护应用过程中的适应性及其问题。采用表面涂覆有氟碳漆的铝板与岩棉板基板复合,开发出一种隧道防火保护装饰系统,其实用性强、技术条件满足标准要求,耐火性能测试RABT升温曲线耐火2 h。

The fire protection requirement of caisson tunnel was introduced,as well as related standard and rules in China and other countries.Through the fire test of RABT heating curve,this paper finds out the adaptability and problems of existing tunnel fire protection coatings and tunnel fire board products in the fire protection application process of steel shell structure caisson tunnel.By combining the aluminum coated with fluorocarbon paint on the surface and rock wool board substrate,developed a tunnel fire protection and decoration system with strong practicability and technical conditions.Refractory performance test of RABT warming curve showed the fire resistant time is 2 h.