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问一下什么情况下要设平屋面内天沟？有谁了解？

问一下什么情况下要设平屋面内天沟？有谁了解？

浏览：67次 | 提问时间： 07-16 05:51

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脚踏俩只船你划得真漂亮 07-16 05:51

题主好，以下请自行核实施工因素(l)施工过程中对屋面围护不关注保护，随意踩踏屋面，破坏了屋面的平整甚至出现裂纹;
(2)天沟不进行防腐。
(3)钢结构厂房屋面板因跨度过大，很多情况下屋面板存在搭接过程，虽然在搭接处采用了聚氨醋密封胶和138gco缝合钉等处理，安装往往很难达到设计理论标准，导致漏水;
(4)天沟横向没有坡度，制作时应留一定坡度，至少0.5%。
(5)关键节点部位施工马虎。如：女儿墙等根部阴角没有按规定作成圆弧或圆弧太小，卷材端边收头密封不严，上口白铁皮变形，固定点偏少，加之密封材料局部封口脱离;伸出屋面的管道的根部堵塞不严，管道四周找平层没有高出附近找平层，防水层泛水高度不够;保温层施工遇雨，排气槽堵塞，排气孔设置不合理，造成保温层长期浸水;刚性屋面产生裂缝，分割缝处防水密封膏与侧壁粘结不牢等。
(6)轻钢结构假如有设置维护砖墙，钢结构施工单位一定要与土建施工单位配合好，由于这涉及到土建和钢结构两个方面的问题，假如女儿墙面粉刷层垂直度与平整度较差，墙上预留嵌槽与屋面坡度不一致，泛水板嵌人女儿墙的深度不一，结果因热胀冷缩等原因使泛水板与粉刷层局部脱离而产生渗水。
(7)天沟滴檐板省略不设，泛水板宽度偏小。使用因素(l)钢结构厂房在使用过程当中随意增加荷载，导致屋面板变形;严重的导致钢梁挠度过大或坍塌;特别是在屋面檩条上随意增加荷载。如:原设计未考量吊顶或设备管道等，增加了悬挂荷载，檩条变形，导致屋面积水;严重的会导致钢梁挠度过大或坍塌;任何单位均不得擅自增加设计范围以外的荷载。
(2)防水胶、密封胶老化，使用过程中缺少必要的维护。

陈年白 07-16 06:00

坡屋面的坡度变化比较大。坡屋面框架结构坡度大于等于10°且小于75°的建筑屋面。平屋面规定有这些。屋面工程技术规范坡屋面的坡度变化比较大。坡屋面框架结构坡度大于等于10°且小于75°的建筑屋面。平屋面规定有这些。屋面工程技术规范TechnicalcodeforroofengineeringGB50345-20044．2．2单坡跨度大于9m的屋面宜作结构找坡，坡度不应小于3％。4．2．3当材料找坡时，可用轻质材料或保温层找坡，坡度宜为2％。4．2．4天沟、檐沟纵向坡度不应小于1％，沟底水落差不得超过200mm；天沟、檐沟排水不得流经变形缝和防火墙。

友人离尽 07-16 06:08

1、用于各种水利工程及地铁、隧道、桥梁、地下建工程的防水，防渗漏和密封堵漏。
2、工业与民用建筑的斜平屋面、雨棚、天沟及各种不规则的屋面，特别是要求美观的屋面、过街夭桥通道运动场。

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问一下什么情况下要设平屋面内天沟？有谁了解？

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问一下什么情况下要设平屋面内天沟？有谁了解？