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DOI:
工程科学与技术:2009,41(2):58-63
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正挑桩式丁坝壅水特性及其冲刷深度计算模式理论
(1.武汉大学水资源与水电工程科学国家重点实验室;2.武汉大学 水资源与水电工程科学国家重点实验室,湖北 武汉 430072)
Theoretical study on calculation of scouring depth and backwater height associated with permeable pile spur dike
(1..State Key Lab of Water Resources and Hydropower Engineering Science,Wuhan University;2.State Key Lab. of Water Resources and Hydropower Eng. Sci.,Wuhan Univ.,Wuhan 430072,China)
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投稿时间:2008-03-04    修订日期:2008-06-11
中文摘要: 作为一种新型河工建筑物,桩式丁坝对水流及河床的影响亟需可靠的定量研究。为此,在前人研究的基础上,结合室内试验,分析了正挑桩式丁坝区域水流特性及其冲坑特征。采用叠加水头损失的方法并以此建立能量方程式,得出桩式丁坝壅水高度的计算公式。在此基础上,通过进一步理论分析,结合试验验证,对桩式丁坝局部冲刷深度进行了探讨。首先建立了坝头水流叠加模式,进而得出了坝轴断面的流速分布式,并推导出了正挑桩式丁坝局部最大冲刷深度的理论计算公式。所建立的壅水高度和最大冲刷深度计算公式具有清晰的数学模式和明确的物理意义,并得到了室内试验的验证,可为工程设计提供技术依据。
中文关键词: 桩式丁坝  壅水高度  冲刷深度  透水率
Abstract:As a new fashion river regulation building, the effect of pile permeable spur dike to flow and bed needed dependable quantitative research. Based on previous research, and combined indoor experiment, the characteristics of flow nearby pile permeable spur dike and the local scour were analyzed. The local water head loss of permeable spur was considered of superposition which included the water head loss of the current through spur like a water screen and the water head loss of main current cross section extending suddenly. The energy equation was built up based this, and the calculation formula for backwater height of the permeable spur was obtained. Based on this research, through the association theory analysis and experiment, this problem of scour depth was discussed in this paper. Superposed model of flow nearby spur was built firstly, and then the formula of spur head flow velocity distribution is derived. At last, a theory formula of scouring depth around 900 pile permeable spur dike was built. These formulas had explicit mathematical modes and physical conception, and the calculated result fitted the experiment data well. All the researches above could supply technical grounds to the design.
文章编号:200800033     中图分类号:    文献标志码:
基金项目:国家自然科学基金
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引用文本:
周银军,陈立,桂波.正挑桩式丁坝壅水特性及其冲刷深度计算模式理论[J].工程科学与技术,2009,41(2):58-63.
Zhou Yin-Jun,chenli,桂波.Theoretical study on calculation of scouring depth and backwater height associated with permeable pile spur dike[J].Advanced Engineering Sciences,2009,41(2):58-63.