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合兴钢结构浅谈几种不同钢结构的防火保护措施

发布时间:2015-9-14 9:45:52 浏览次数:507
1、屏蔽。钢结构设置在耐火材料组成的墙体或顶棚内,或将构件包藏在两片墙之间的空隙里,只要增加少许耐火材料或不增加即能达到防火的目的。这是一种最为经济的防火方法。四、膨胀材料。采用钢结构防火涂料保护构件,这种方法具有防火隔热性能好、施工不受钢结构几何形体限制等优点,一般不需要添加辅助设施,且涂层质量轻,还有一定的美观装饰作用,属于现代的先进防火技术措施。

2、外包层。就是在钢结构外表添加外包层,可以现浇成型,也可以采用喷涂法。现浇成型的实体混凝土外包层通常用钢丝网或钢筋来加强,以限制收缩裂缝,并保证外壳的强度。喷涂法可以在施工现场对钢结构表面涂抹砂泵以形成保护层,砂泵可以是石灰水泥或是石膏砂浆,也可以掺入珍珠岩或石棉。同时外包层也可以用珍珠岩、石棉、石膏或石棉水泥、轻混凝土做成预制板,采用胶粘剂、钉子、螺栓固定在钢结构上。

3、充水(水套)。空心型钢结构内充水是抵御火灾最有效的防护措施。这种方法能使钢结构在火灾中保持较低的温度,水在钢结构内循环,吸收材料本身受热的热量。受热的水经冷却后可以进行再循环,或由管道引入凉水来取代受热的水。


1, shielding. Steel structure is set within the refractory material of the wall or ceiling, or component parcel in the space between the two pieces of wall, as long as can increase a few refractory or not achieve the purpose of fire prevention. This is one of the most economic way to fire. Fourth, expand material. Steel structure fire-retardant coating protection component, this method has good fireproof and heat insulation performance, construction steel structure geometry form without limit etc, and generally do not need to add auxiliary facilities, and the coating quality is light, there are some beautiful adornment effect, belongs to the modern advanced fire prevention technology measures.

2, outsourcing layer. Layer is added in the steel structure appearance outsourcing, can cast-in-situ molding, spraying method can also be adopted. Cast-in-situ molding outsourcing entities concrete layer usually use steel wire or steel to strengthen, to limit the shrinkage crack, and ensure the strength of the shell. Spraying method in the construction site daub sand pump to form a protective layer on the surface of a steel structure, sand pump can be cement or lime plaster mortar, can be mixed with perlite or asbestos. While outsourcing layer can also use pearlite, asbestos cement, gypsum, or asbestos, light concrete precast slab, using adhesives, nail, bolt is fixed on the steel structure.

3, water filling (jacket). Filling water in the hollow steel structure is the most effective protective measures against fire. This method can keep the steel structure in the fire at a low temperature, water circulate in the steel structure, the quantity of heat of heat absorption material itself. The heated water can be recycled after cooling, or introduced by the pipe cold water to replace the heated water.



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