[1]朱智伟,邵新正,于军.球墨铸铁管摩阻系数取值敏感性研究[J].中国给水排水,2021,37(10):147-153.
　ZHU Zhi-wei,SHAO Xin-zheng,YU Jun.Sensitivity Study on Friction Coefficient of Ductile Iron Pipe[J].China Water & Wastewater,2021,37(10):147-153.
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球墨铸铁管摩阻系数取值敏感性研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期数: 2021年第10期 页码: 147-153 栏目: 出版日期: 2021-05-17
Title:
Sensitivity Study on Friction Coefficient of Ductile Iron Pipe
作者:
朱智伟，邵新正，于军
(河南省水利勘测设计研究有限公司，河南郑州450000)
Author(s):
ZHU Zhi-wei,SHAO Xin-zheng,YU Jun
(Henan Water & Power Engineering Consulting Co. Ltd., Zhengzhou 450000, China)
关键词:
球墨铸铁管; 摩阻系数; 现场检测; 敏感性分析
Keywords:
ductile iron pipe; friction coefficient; field test; sensitivity analysis
摘要:
基于不确定度评价理论对大口径球墨铸铁管的水力摩阻系数进行了现场检测。对水力摩阻系数的影响因素，包括管径（D）、流速（v）、水温（T）、当量粗糙度（k），进行敏感性分析。检测及分析结果表明，管径的变化范围较大，由此引起的摩阻系数变化也最大，在DN80~DN2 600的管径范围内，曼宁糙率系数（n）从0.008 5增至0.010 8；海澄-威廉系数（Ch）从142增至150。工程设计若不考虑管径的影响，取固定的摩阻系数值，沿程水头损失计算误差最大可分别达到54%（谢才-曼宁公式）和10%（海澄-威廉公式）。建议工程设计优先采用达西公式和柯尔勃洛克–怀特公式进行水力计算，采用k=0.10 mm 作为水泥砂浆内衬球墨铸铁管的设计值。
Abstract:
Based on the uncertainty evaluation theory, the hydraulic friction coefficient of large diameter ductile iron pipe was measured in situ. The influence factors of hydraulic friction coefficient, including pipe diameter D, velocity v, water temperature T and equivalent roughness k, were analyzed. The results show that the pipe diameter D varied widely, and the resulting friction coefficient changed the most. In the range of DN80-DN2 600, Manning roughness coefficient n increases from 0.008 5 to 0.010 8, and Hazen-Williams coefficient Ch increases from 142 to 150. If the influence of pipe diameter D is not considered in engineering design, the maximum calculation error of head loss along the pipeline can reach 54% (Chezy-Manning formula) and 10% (Hazen-Williams formula) respectively with fixed friction coefficient. It is suggested that Darcy’s formula and Colebrook-White formula should be used in engineering design for hydraulic calculation, and the equivalent roughness k=0.10 mm should be used as the design value of ductile iron pipelined with cement mortar.

相似文献/References:

[1]施凯,陈志伟,彭秀华,等.冰浆清洗技术对小口径球墨铸铁给水管道的清洗效果[J].中国给水排水,2021,37(3):69.
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[2]杨贺,黄跃明,胡金财,等.大口径球墨铸铁管在沉管施工中的创新性应用[J].中国给水排水,2023,39(16):135.
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更新日期/Last Update: 2021-05-17