小浪底水库泥沙管道高效输送的合理参数分析

发布时间：2018-05-12 16:54

本文选题：水库泥沙 + 管道输送　；参考：《南水北调与水利科技》2017年05期

【摘要】：针对管路中沿程实时变化的含沙量和颗粒级配情况,借鉴以往的研究成果,从管路中泥沙的冲淤变化、悬浮特性等多角度分析确定了管道输送泥沙的临界不淤流速;并采用实测值与模型计算值对比拟合的方法,确定了用费祥俊的临界不淤流速计算模型来分析本次管道输送的临界不淤流速;最后,以理论与实践结合提出小浪底水库泥沙管道高效输送的管径和含沙量,为今后试验或生产实践提供参考依据。提出了管径为0.325m和0.63m两种不同工况的高效输送参数:含沙量均为620kg/m~3,中值粒径范围0.051 2~0.062 9mm,D90为0.14mm,输送流速分别可在1.75~2.08m/s和2.08~2.2m/s之间进行调节。对应最大月排沙量分别为8.95万t和34.72万t。
[Abstract]:In view of the real-time variation of sediment content and particle gradation along the pipeline, the critical non-silt velocity is determined from the aspects of sediment scour and siltation change and suspension characteristics of pipeline sediment, based on the previous research results. By using the method of comparing the measured value with the calculated value of the model, the critical non-silt velocity calculation model of Fei Xiangjun is determined to analyze the critical non-silt velocity of the pipeline transportation. Based on the combination of theory and practice, the pipe diameter and sediment content of Xiaolangdi reservoir sediment pipeline are put forward in order to provide reference for future test or production practice. The high efficiency transport parameters with diameter of 0.325 m and 0.63 m were put forward: the sediment content was 620kg / m ~ (-3), the median particle size was 0.051 ~ 0.062 ~ (9) mm / d _ (90) was 0.14 mm, and the flow rate could be adjusted between 1.75~2.08m/s and 2.08~2.2m/s respectively. The corresponding maximum monthly sediment discharge is 89500 t and 347200 t respectively.
【作者单位】：西安理工大学水利水电学院;
【基金】：水利部公益性行业科研专项经费项目(201301063)~~
【分类号】：TV145

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