山区多沙河流上大库盘水库冲淤排沙技术研究

发布时间：2018-03-31 04:12

本文选题：克孜尔水库　切入点：大库盘水库　出处：《新疆农业大学》2014年硕士论文

【摘要】：水库淤积,是泥沙研究的一个重要分支。水库泥沙淤积会造成水库库容损失,致使水库本身相应效益有所降低,严重者甚至会导致水库工程报废。因此,人们如何进行水库淤积处理,保持和恢复在役水库的相应功能,已经成为当前水利工作者关注的热点问题之一。克孜尔水库是一座位于新疆多沙河流上典型的大型山区控制性水库,而且是大库盘水库。首先,本文通过探究克孜尔水库的来水来沙特征、泥沙淤积物运动规律、淤积现状以及水库排沙运用方式,分析了水库淤积原因及其变化趋势。然后,通过支流黑孜河库段水工模型试验,研究克孜河入库段泥沙冲淤规律,提出导流堤与排沙渠联合排沙方式,将支流段大部分泥沙通过溯源冲刷或异重流等方式排除库外,以此来缓解克孜尔水库的泥沙淤积问题。再者,通过水库溯源冲刷的纵剖面形状及其对应关系建立了溯源冲刷过程纵剖面方程,又结合沙量平衡方程得出山区多沙河流上大库盘水库溯源冲刷排沙量和溯源冲刷长度估算公式,并且选用克孜尔水库实测资料进行了相关验证。最后,对相关研究成果进行归纳、概括,并对今后水库冲淤排沙方面的研究提出了几点展望。
[Abstract]:Reservoir siltation is an important branch of sediment research.The siltation of the reservoir will result in the loss of the reservoir capacity, which will reduce the corresponding benefit of the reservoir itself, or even lead to the abandonment of the reservoir project.Therefore, how to deal with reservoir sedimentation and maintain and restore the corresponding functions of existing reservoirs has become one of the hot issues concerned by water conservancy workers.Kizil reservoir is a typical large mountain area control reservoir located on the sandy rivers in Xinjiang, and it is also a large reservoir.First of all, this paper analyzes the reasons and trends of sediment accumulation in Kizil reservoir by exploring the characteristics of water and sediment, the law of sediment movement, the current situation of sediment deposition and the application mode of sediment discharge in the reservoir.Then, through the hydraulic model test of Heizi River reservoir section, the rules of sediment scouring and silting in Kezi River reservoir section are studied, and the combined sediment discharge method of diversion embankment and sediment drainage channel is put forward, and most of the sediment in the tributary section is excluded from the reservoir by means of traceability scour or heavy current, etc.In order to alleviate the problem of sediment deposition in Kizil reservoir.Furthermore, the longitudinal profile equation of traceability erosion process is established through the profile of the longitudinal section and its corresponding relationship.Based on the balance equation of sediment volume, the estimation formulas of traceability and scour length of Dakupan reservoir in mountainous area are obtained, and the experimental data of Kizil reservoir are used to verify the equation.Finally, the related research results are summarized, and some prospects for future research on scour and sediment discharge in reservoirs are put forward.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV145;TV697.31

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