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小浪底水利枢纽工程运行后,库区淤积物以细泥沙为主,而通过现有技术很难将其排出库外,对小浪底水库长期有效库容的损失影响极大,因此研究高含沙水流远距离管道输配技术尤为重要,而抽沙输沙试验工程位置的布设是研究高含沙水流远距离管道输配技术的重要组成部分。对此,提出邻近三角洲淤积顶点,淤积相对稳定河段、库区上游三个试验方案,采用现场观测及收集资料的方法对三个方案条件下小浪底水库不同位置泥沙淤积分布特点及河道特点进行对比分析。结果表明,三个方案均满足抽沙试验的要求,综合比较后最终选取方案2确定的位置为试验区域。
After the operation of Xiaolangdi Hydro Project, the sediment in the reservoir area is dominated by fine sediment. However, it is difficult to discharge it through the existing technology and greatly affect the loss of long-term effective storage capacity of the Xiaolangdi Reservoir. Therefore, It is very important for the technology of pipeline transportation and distribution, and the layout of the location of the pumping and sediment transport test is an important part of the research on long distance pipeline transportation and distribution technology of high silt water flow. In this connection, three experimental schemes are proposed, including the apexes of siltation in the adjacent delta, the relatively stable deposition of silt and the upper reaches of the reservoir area. The distribution of sediment and distribution of sediment at different positions in Xiaolangdi Reservoir under the three schemes are analyzed by on-site observation and data collection Comparative analysis. The results show that the three schemes all meet the requirements of sand pumping experiment. After the comprehensive comparison, the final selection scheme 2 determines the location as the test area.