三个泉倒虹吸预应力钢筒混凝土管沿程水头损失计算分析  

Calculation Analysis of Fricition Head Loss for PCCP Pipe in Sangequan Invert Siphon

作　　者：常胜[1,2] 牧振伟[1] 万连宾[3] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000 [3]新疆额尔齐斯河流域开发工程建设管理局,新疆乌鲁木齐830000

出　　处：《水电能源科学》2015年第9期95-98,共4页Water Resources and Power

基　　金：新疆高等学校科研计划重点项目(XJEDU2011I19);新疆维吾尔自治区自然科学基金资助项目(2012211A059)

摘　　要：针对三个泉倒虹吸过流量富余的问题,基于工程特点及其水力设计方法,借鉴大口径钢管和预应力钢筒混凝土管(PCCP管)当量粗糙度的取值,根据雷诺数与相对粗糙度,结合莫迪图判别分析了大流量工况下倒虹吸管道水流流态,在此基础上,利用齐恩公式、海曾—威廉公式、谢才公式分别计算了三个泉倒虹吸水头损失值,并与实测资料进行对比分析。结果表明,随着管径增大,管壁光滑程度增加,使得PCCP管内水流处于紊流过渡区而非阻力平方区,因此不应选用谢才公式,而这正是导致三个泉倒虹吸过流能力与设计标准不符的主要原因。此外,发现齐恩公式、海曾—威廉公式适用于大口径有压PCCP管沿程水头损失计算。Aiming at the problem of the additional excess flow of Sangequan invert siphon, the paper chooses Sangequan invert siphon as case study based on the engineering characteristics and hydraulic design method. Referring to the previous information on the equivalent roughness value of large-diameter steel pipe and PCCP pipe, based on Reynolds number and relative roughness, combined with Moody diagram, this paper discriminated the pipe flow pattern under conditions of large flow rate. On the basis, different formulas were used to calculate head loss of Sangequan invert siphon. And then, the calculation results were comparative analysis with the measured data. The results show that with the increasing diameter and smooth wall pipe, the flow of PCCP pipe is in the turbulent transition region and it is not the region of quadratic resistance law. Therefore, Chezy formula should not be used, and this is the main cause that the flow capacity of Sangequan inverted siphon does not conform to the design standard. In addition, it is found that Jain A K formula and Hazen-William formula can be suitable for calculating the frictional head loss of the large-diameter pressure PCCP pipe.

关 键 词：倒虹吸 预应力钢筒混凝土管 大口径管道 沿程水头损失 流态判别 齐恩公式 海曾—威廉公式 

分 类 号：TV131.22[水利工程—水力学及河流动力学]