黄河下游引黄灌区管道输水临界不淤流速试验  

Study on Non-Silting Velocity of Water Conveyance Pipelines in the Yellow River Downstream Irrigation Area

作　　者：姜金利[1] 张庆华[1] 程明[1] 李福军[2] 

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271018 [2]黄河水利委员会山东水文水资源局,山东济南251000

出　　处：《人民黄河》2014年第8期137-140,共4页Yellow River

基　　金：水利部公益性行业科研专项(201201115)

摘　　要：为了研究黄河下游引黄灌区管道输水临界不淤流速的计算方法,在室内用U-PVC管道,以黄河泥沙为沙样,进行了90、110、125 mm三种管径、两种泥沙颗粒级配条件下,不同含沙量浑水管道输水临界不淤流速试验。结果表明:试验条件下,在含沙量、管径相同时,浑水中泥沙粒径越大,临界不淤流速越大;在管径、泥沙粒径相同时,含沙量越大,临界不淤流速越大;在泥沙粒径、含沙量相同时,管径越大,临界不淤流速越小。依据试验成果,利用回归分析方法建立了黄河下游引黄灌区管道输水临界不淤流速计算公式。A series of experiments on non-silting velocity of muddy water conveyance pipelines with different sediment concentration were carried out to study the calculation method of water conveyance pipelines of irrigation area in the Yellow River downstream. We used U-PVC pipe indoors with the Yellow River sediment as the sand sample and 90 mm, 110 mm and 125 mm three pipe diameters and two sediment particle gradations. The results show that the bigger sediment particle in muddy water is, the greater non-silting velocity will be; the higher sediment concentration is, the greater the non-silting velocity will be under the same conditions of sediment concentration and pipe diameter. The bigger pipe diameter is, the smaller the non-silting velocity will be in case of the same sand sample. It has established the calculating formula of non-silting velocity of water conveyance pipelines in the Yellow River downstream irrigation area by using regression analysis on the basis of results.

关 键 词：管道输水 不淤流速 引黄灌区 

分 类 号：S274.2[农业科学—农业水土工程]