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路莅枫, 乾东岳, 宋 辉.顺直分汊河段枢纽施工及运行初期河床变形规律分析水资源与水工程学报[J].,2018,29(6):151-156
顺直分汊河段枢纽施工及运行初期河床变形规律分析
Riverbed deformation analysis of straight branching channel in project construction and initial operation period
  
DOI:10.11705/j.issn.1672-643X.2018.06.23
中文关键词:  分汊河段  河床变形  施工期  运行初期  人工采砂  桃园水利枢纽
英文关键词:branching river  riverbed deformation  construction period  initial operation period  artificial sand mining  Taoyuan hydro-junction
基金项目:国家自然科学基金项目(51509118);湖南省交通运输厅科技进步与创新计划项目(201717);中央级公益性科研院所基本科研业务费专项资金项目(TKS180301)
作者单位
路莅枫1, 乾东岳2, 宋 辉1 (1.湖南省水运建设投资集团有限公司 湖南 长沙 4100112.交通运输部天津水运工程科学研究所 工程泥沙交通行业重点实验室 天津 300456) 
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中文摘要:
      针对顺直分汊河段坝下河床在枢纽运行初期河床变形剧烈影响通航的问题,本文以沅水末级梯级桃源枢纽为例,在搜集施工期及运行初期水文资料、遥感图像以及实测地形资料的基础上,进行了河床演变分析。分析结果表明,坝下河床粗化后以推移质运动为主,且河床粗化始于枢纽施工期;运行期同期来流空间分布变化、施工导流束窄或封堵支汊、无序人工采砂对坝下河床重塑有较大影响,其中施工导流、人工采砂对河床的影响随机性较强,可预测难度较大。
英文摘要:
      Aiming at solving the problem that the river bed in the dam downstream of the straight branching reach is deformed severely in the initial stage of the operation of the project, which affects navigation, this paper takes the last cascade Taoyuan Project of Yuanshui as an example to analyze the river bed evolution on the basis of collecting hydrological data, remote sensing images and topographic data during the construction period and the initial operation stage. The analysis results showed that the bed coarsening under the dam was dominated by bed load movement, and the bed coarsening began during the construction period of the project. During the same period of operation, the variation of spatial distribution of incoming flow, narrow construction diversion bundle, blocking branch and disorderly artificial sand mining had great influence on the remodeling of river bed under dam. Among them, the influence of construction diversion and artificial sand mining on river bed was very random, and difficult to predict.
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