从水力学观点看,聚氯乙烯排水管的特点是壁表面光滑,管段较长,接口数量减少;此外构件为刚性体,管道和管件很好定中。聚氯乙烯排水管网的水力计算按曼宁-斯特利克列尔公式完成Q=kSR~(2/3)J~(1/2)(1)具有水流系数k=120。这时公式(1)将有如下形式:Q=120SR~(2/3)J~(1/2)(2)式中 Q—流量(米~3/秒); From a hydraulic point of view, PVC drainage pipes are characterized by a smooth wall surface, a long pipe section, and a reduced number of interfaces; in addition, the components are rigid bodies and the pipes and fittings are well centered. The hydraulic calculation of PVC drainage network is completed according to the Manning-Stolikler formula. Q=kSR~(2/3)J~(1/2)(1) has a flow coefficient of k=120. At this time formula (1) will have the following form: Q = 120SR ~ (2/3) J ~ (1/2) (2) where Q - flow (m ~ 3 / sec);