The fire prevention methods of the thermal insulation layer of the tunnel concrete structure mainly include spraying fire-proof coating and laying fire-proof board. Due to the deformation and leakage of tunnel structure and other factors, the fire-proof coating is easy to crack and the material performance is reduced, which not only affects the fire-proof effect, but also affects the service life; while the scheme of laying the fire-proof plate, although it adapts to certain deformation requirements, its joints and metal fasteners transfer part of the heat to the structure surface, causing damage to the surface layer structure, inconvenient construction and subsequent maintenance.

　　隧道复合防火设计是一种系统水下隧道混凝土结构防火措施,有特殊吊挂金属龙骨灵活的方式,有效吸收由于管道的扩张,结算、变形和其他有害因素,因此附加火结构不会被破坏;同时，具有优异的冲击强度和抗断裂能力的面板能有效吸收高速车辆进出时的正、负压冲击波。

　　Tunnel composite fire protection design is a fire protection measure for underwater tunnel concrete structure. It has a special flexible way of hanging metal keel, which can effectively absorb expansion, settlement, deformation and other harmful factors of the pipeline, so the additional fire structure will not be damaged; At the same time, the panel with excellent impact strength and fracture resistance can effectively absorb the positive and negative pressure shock wave when high-speed vehicles enter and leave.

　　防火材料有牛仔蓝防火板做哈密瓜防火板多种类型，防火板，内衬防火混凝土，添加防火纤维防火灰纸防火板尺寸结构混凝土保护层，防火涂料等。

　　There are many types of fire-proof materials, such as cowboy blue fire-proof board, Hami melon fire-proof board, fire-proof board, lining fire-proof concrete, adding fire-proof fiber fire-proof ash paper fire-proof board size structure concrete protective layer, fire-proof coating, etc.

　　防火板硅酸盐防火板的主要成分一般是特级水泥、硅酸盐、珍珠盐和石英砂。板材厚度与防火性能成正比，施工方便。例如，荷兰Vlake隧道、宁波长虹隧道、上海外环隧道、南京玄武湖隧道采用比利时安防公司生产的Promat隧道防火板系列。

　　The main components of silicate fire-proof board are super grade cement, silicate, pearl salt and quartz sand. The thickness of the board is directly proportional to the fire performance, and the construction is convenient. For example, the Dutch vlake tunnel, Ningbo Changhong tunnel, Shanghai outer ring tunnel and Nanjing Xuanwu Lake Tunnel adopt the ProMat tunnel fire-proof board series produced by Belgium security company.

　　隧道复合防火系统的性能特点不同于传统的防火措施。隧道复合防火系统具有以下特点。

　　The performance of the tunnel composite fire protection system is different from the traditional fire protection measures. The tunnel composite fire protection system has the following characteristics.

　　在防火性能方面，结构背温在200咖啡橡木防火板℃范围内，因此采用粉煤灰防火板可以有效地保护混凝土层，解决混凝土耐火石墨防火板爆破黑核桃防火板裂缝的问题。容易导热的部分整个防火成员和管之间,挂片,只占总数的4.55%的管道区域块(每个挂片之间的接触面积和管道块只是管部分,其余部分是岩棉与极低的导热系数;相对较少的延长螺钉的使用，这意味着有较低的可能性直接传热到钢管钢和相对改善的安全性。

　　In terms of fire performance, the back temperature of the structure is within the range of 200 ℃ of coffee oak fire-proof board, so the use of fly ash fire-proof board can effectively protect the concrete layer and solve the problem of cracks in the black walnut fire-proof board caused by the explosion of concrete fire-resistant graphite fire-proof board. The part easy to conduct heat is only 4.55% of the total pipe area block (the contact area between each hanging piece and the pipe block is only the pipe part, and the rest part is rock wool and extremely low thermal conductivity; relatively less use of extension screws means that there is a low possibility of direct heat transfer to the steel pipe and relatively improved safety).

　　在结构方面,通过刚性和柔性材料,防火结构并不容易被吊挂金属龙骨的灵活的方式,可以有效地吸收由于管道的扩张和收缩,结算、变形和其他有害因素,所以附加火结构不会被破坏;表面板具有优异的冲击强度和抗断裂能力，能有效吸收高速车辆进出时的正负压冲击波。面板接缝处填充无机耐℃胶，使整个防火构件无任何薄弱环节。在现有的基础上，易于提高隧道的火灾等级。

　　In terms of structure, through rigid and flexible materials, the fire-proof structure is not easy to be hanged with metal keel in a flexible way, which can effectively absorb expansion and contraction of pipes, settlement, deformation and other harmful factors, so the additional fire structure will not be damaged; The surface plate has excellent impact strength and fracture resistance, and can effectively absorb the positive and negative pressure shock wave when high-speed vehicles enter and leave. The joints of the panel are filled with inorganic temperature resistant adhesive, so that the whole fire-proof component has no weak links. On the existing basis, it is easy to improve the fire level of the tunnel.

　　在其他用途上，只使用了2.5个钳子，这意味着可以减少对隧道内壁的破坏。表盘由无机材料组成，防水不会发霉，防火性能不会受潮或发霉的材料;易于装配和后续维护;整个防火板的安装高度可调的防火板黄金洞,和其他辅助网络编织银防火板设施等各种管道和伸缩缝在隧道的保护范围应当包括隧道的防火保护系统与羊毛防火板,以便节省这部分的消防费用。此外，其悬挂能力强，可安装在隧道内的各种附属设施的防火层上，不影响现有的消防效率。

　　In other applications, only 2.5 pliers are used, which means that the damage to the inner wall of the tunnel can be reduced. The dial is made of inorganic materials, which are waterproof and mildew free, and whose fireproof performance is not affected by damp or mildew; it is easy to assemble and maintain; the installation height of the whole fireproof board is adjustable, and the protection scope of various pipes and expansion joints in the tunnel, such as the golden hole of the fireproof board, and other auxiliary network woven silver fireproof board facilities, shall include the fire protection system and wool fireproof board of the tunnel, In order to save this part of the fire costs. In addition, it has strong hanging capacity and can be installed on the fireproof layer of various auxiliary facilities in the tunnel without affecting the existing fire efficiency.

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