简析柔性铸铁排水管在高层住宅建筑中的应用

Brief Analysis of the Application of Flexible Cast Iron Drainage Pipes in High-Rise Residential Buildings

论文总结了住宅项目中铸铁排水管的安装及使用注意示项。具体如下:(1)排水立管采用铸铁排水管、卫生间支管采用PVC-U排水管,铸铁排水立管与PVC-U支管接口处改为法兰机械式连接能保证不被破坏;(2)各生产厂的铸铁排水管件尺寸各不相同,管件对空间占用尺寸有影响,在施工前一定要确定好产品,复核其尺寸并按此预留孔洞;(3)在一些特殊部位由于空间限制时,需采用定制加长型铸铁管件;为减少对标准长度管道切割造成余料的浪费,可在标准层按层高扣除管件长度后定制铸铁排水立管;(4)在交工前,使用草酸进行清洗会对安装外墙的铸铁排水管防腐层造成酸蚀,这需加强管道的成品保护;(5)卫生间内和出屋顶的铸铁排水管道应作等电位联结。室外埋地铸铁排水管道由于管径较大和地面承受汽车荷载,设计上应根据规范进行所要求的相关计算。铸铁排水管道自重和满管水重量较大,应按规范设置支架。在铸铁排水管穿越结构处,因预留孔洞和套管封堵质量而导致渗水。

The paper summarizes the installation and usage precautions of cast iron drainage pipes in residential projects,as follows:①general drainage risers use cast iron drainage pipes,and toilet branch pipes use PVC-U drainage pipes,the interface between the cast iron drainage riser,and there is corrosion of the steel band clamp or water seepage at the interface.The interface at this location is changed to a flanged mechanical connection to ensure that it will not be damaged;②the size of drainage ductile iron pipe fittings in each production plant is different,and the pipe fittings have an impact on the size of the space occupied.Before construction,the product must be determined,its size should be reviewed,and holes should be reserved accordingly;③in some Special parts,it is necessary to use Customized extended cast iron pipe fittings;In order to reduce the waste of excess material caused by cutting standard length pipes,the standard layer can deduct the length of the pipe fittings according to the layer height to customize the cast iron drainage riser;④before delivery,cleaning with oxalic acid will cause acid to the anti-corrosion layer of the cast iron drainage pipe installed on the outer wall.Corrosion,it is necessary to strengthen the protection of the finished product of the pipeline;⑤The cast iron drainage pipes in the toilet and out of the roof should be equipotential bonding.Due to the large diameter of the outdoor buried cast iron drainage pipeline and the load of the vehicle on the ground,the relevant calculations required by the specification should be carried out in the design.The weight of the cast iron drainage pipe and the weight of the full pipe water are relatively large,so the bracket should be set according to the specification.Where the cast iron drainage pipe passes through the structure,water seepage is caused by the quality of the reserved holes and casing plugging.