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污水管道设计流速一般是多少？有没有什么标准？

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污水管道设计流速一般是多少？有没有什么标准？

浏览：168次 | 提问时间： 07-24 09:48

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笑容凉薄 07-24 09:49

《室外排水设计规范》中规定，雨水管渠(满流时)的最小设计流速为0.75m/s。由于明渠内发生淤积后易于清除、疏通，所以可采用较低的设计流速，一般明渠内最小设计流速为0.4m/s。为防止管壁及渠壁因冲刷而损坏，雨水管道最大设计流速为：金属管道为10m/s，非金属管道为4m/s，明渠最大设计流速则根据其内壁材料的抗冲刷性质，按设计规范选用。

半度岁月 07-24 09:57

排水管道的最小管径与相应最小设计坡度的规定取值是：污水管最小管径d300mm/相应最小设计坡度塑料管0.002、其他管0.003。雨水管最小管径d300mm/相应最小设计坡度塑料管0.002、其他管0.003。如果地形较平坦，一般设计可参见《室外排水设计规范》（GB50014-2006）条文说明第4.2.10条规定：在不同条件下管道的最小管径和相应的最小设计坡度。随着城镇建设发展，街道楼房增多，排水量增大，应适当增大最小管径，并调整最小设计坡度。常用管径的最小设计坡度，可按设计充满度下不淤流速控制，当管道坡度不能满足不淤流速要求时，应有防淤、清淤措施

想咬我你必须有牙 07-24 10:06

你好，最小设计流速为0.75m/s。由于明渠内发生淤积后易于清除、疏通，所以可采用较低的设计流速，一般明渠内最小设计流速为0.4m/s。为防止管壁及渠壁因冲刷而损坏，雨水管道最大设计流速为：金属管道为10m/s，非金属管道为4m/s。具体要看你的实际情况而定，以上情况给你个参考，你看着弄吧，实在不行找专业人员就好。希望可以帮到你。

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