彩钢屋面渗漏原因分析
天物彩板专注彩涂卷行业17年——彩钢屋面渗漏原因分析_彩涂卷屋面板生产厂家_天物集团请拨打网站上方电话咨询
1.设计原因
《门式刚架灯箱钢结构技术规范》规定，门式刚架灯箱屋面坡度宜为1/8~1/20，且多雨区
应在区域中取较大的值。在实际设计工程中，为了节约资金或其他要求，施工单位应尽量减少屋面坡度
工程屋面坡度太小，房屋区积水无法及时排至天沟。
由于缺乏节点设计，施工单位随意选择节点方式，屋脊处女儿墙高度不够，伸出屋面的管道和排气管位置不当或
高度不足以影响防水施工。
板类型选择不当。对于暗扣、暗咬的板式，只要现场安装得当，一般不会有大问题。如果它们是直接安装的
对于用自攻螺钉连接的板式，即使现场处理良好，可以制作防水胶，也会因面板损坏而导致热膨胀和冷缩性能泄漏
水
外壳彩板太薄，刚度不符合要求。使用一段时间后，外板在温度的影响下腐蚀或变形，板之间的间隙增大
遇大风时，彩板将被掀开。
2.施工原因
建筑工程中随意践踏屋面，破坏屋面平整度，甚至产生裂缝。部分施工单位的天沟防腐仅刷防锈漆或防锈漆
使用沥青漆一段时间后，排水沟严重腐蚀。
由于钢结构厂房的屋面板跨度较大，尽管在搭接点使用聚氨酯密封剂，但在许多情况下，屋面板需要进行搭接
然而，经过一段时间后，由于冷热变形，板表面端口开裂，导致雨水泄漏。
关键节点的构造比较粗糙。女儿墙内角及其他根部泛水锚固点少，密封不严，异型件变形，管道根部伸出屋面
孔洞封堵不严，管道周围防水层泛水高度不够。
3.使用理由
在使用过程中，主体外部设施任意设置在屋面上，导致荷载增加，屋面板变形。特别是，屋顶檩条上的荷载可任意增加
条状变形，导致房屋区域积水。或在不可接近的屋顶上被人损坏，防水胶、密封胶老化，在使用工程中没有定期检查
维修保养：顶板长期受阳光、雨雪侵蚀，内部保温材料风化，失去刚度变形。
1. Design reasons
Technical specification for steel structure of portal frame light house stipulates that the roof slope of portal frame light house should be 1 / 8 ~ 1 / 20, and in areas with more rain
The larger value should be taken in the region. In the actual
design project, in order to save money or other requirements, the construction unit shall minimize the roof slope
The slope of the project roof is too small, so that the water in the house area cannot be discharged to the gutter in time.
Due
to the lack of node design, the construction unit randomly selects the node method, the parapet height at the ridge is not enough, and the position of the pipeline and exhaust duct extending out of the roof is inappropriate or
The height is not enough to affect the waterproof construction.
Improper plate type selection. For the plate types of concealed buckle and bite, as long as they are properly installed on site, there will generally be no big problem. If they
are directly installed
For the plate type connected with self tapping screws, even if the site treatment is good and the waterproof glue can be made, the performance of thermal expansion and cold contraction will leak due to the damage of the panel
Water.
The color plate of the enclosure is too thin and the stiffness does not meet the requirements. After a period of use, the outer plate corrodes or deforms under the influence of temperature, and the gap between the plates increases
In case
of strong wind, the color plate will be lifted off.
2. Construction reasons
Trampling on the roof at will in the construction project destroys the flatness of the roof and even cracks. The gutter anticorrosion of some construction units is
only painted with antirust paint or
After using asphalt paint for a period of time, the gutter is seriously corroded.
Due to the large span of the house panels in the steel structure plant, there is a lapping process of the roof panels in
many cases, although polyurethane sealant is used at the lapping points
However, after a period of time, the plate surface port is cracked due to cold and hot deformation, resulting in rain leakage.
The construction of key nodes is rough.
There are few flashing anchor points at the internal corners of the parapet and other roots, the sealing is not tight, the profiled parts are deformed, and the root of the pipe extending out of the roof
The hole is not blocked tightly, and the flashing
height of the waterproof layer around the pipeline is not enough.
3. Use reason
During use, the external facilities of the main body are arbitrarily set on the roof, resulting in the increase of load and the deformation of roof slab. In particular,
the load is arbitrarily increased on the roof purlin
Strip deformation, resulting in water in the house area. Or the board is damaged by people on the non accessible roof, the waterproof glue and sealant are aging, and there is no regular inspection
in the use project
Repair and maintenance: the roof plate is eroded by sunlight, rain and snow for a long time, and the internal thermal insulation material is weathered, loses its stiffness and deforms.
