| 黏性土均质坝“陡坎”移动速度试验研究 |
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| 引用本文： | 王晓刚,李云,王小东,沈登乐. 黏性土均质坝“陡坎”移动速度试验研究[J]. 中国农村水利水电, 2010, 0(2): 102-104 |
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| 作者姓名： | 王晓刚 李云 王小东 沈登乐 |
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| 作者单位： | 1. 南京水利科学研究院,南京,210029;水文水资源与水利工程科学国家重点实验室,南京,210029
2. 安徽省滁州市水利勘测设计院,安徽,滁州,239000 |
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| 基金项目： | “十一五”国家科技支撑计划项目“水库大坝安全保障关键技术研究”(2006BAC14B00); 江苏省博士后科研资助项目“均质黏性土坝漫顶溃决机理试验研究”(0802074C) |
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| 摘 要： | "陡坎"式发展是黏性土均质坝漫顶溃决的重要机理。开展了7组黏性土均质坝"陡坎"移动速度室内实体物理模型试验,旨在揭示黏性土均质坝"陡坎"式发展的基本规律。试验结果显示,相同压实度条件下,含水量越大,陡坎移动速度越慢,当含水量达到最优含水量后,陡坎移动速度非常缓慢(本文试验含水量范围为10%~18%)。压实度越小,陡坎移动速度越快。基于土石坝"陡坎"式冲蚀力学机理,建立了坝体土"起动摩阻流速"U*c与坝体材料抗冲能力综合系数C之间的关系,实例验证显示,提出的预报模型能够明显提高"陡坎"移动速度的预测准确度。
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| 关 键 词： | 陡坎 材料综合系数 起动摩阻流速 |
The Rate of Headcut Migration of Cohesive Homogeneous Embankment |
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| WANG Xiao-gang , LI Yu , WANG Xiao-dong , SHEN Deng-Le. The Rate of Headcut Migration of Cohesive Homogeneous Embankment[J]. China Rural Water and Hydropower, 2010, 0(2): 102-104 |
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| Authors: | WANG Xiao-gang LI Yu WANG Xiao-dong SHEN Deng-Le |
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| Affiliation: | WANG Xiao-gang1,2,LI Yu1,WANG Xiao-dong1,SHEN Deng-Le3(1.Nanjing Hydraulic Research Institute,Nanjing 210029,China,2.State Key Laboratory of Hydrology-Water Resources , Hydraulic Engineering,3.Chuzhou Survey , Design Institute of Water Conservancy , Hydropower,Anhui Province,Chuzhou 239000,China) |
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| Abstract: | The headcut is an important mechanism of cohesive homogeneous embankment failed by overtopping.7 physical model tests of the headcut migration rate were conducted to study the rules of the process of the headcut.According to the result that the larger the water content is,the more slowly the headcut migration rate is when the degree of compaction is the same.As the water content exceeds the optimum moisture content,the rate is very low(the water content of embankment is 10%~18% in this paper).The smaller th... |
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| Keywords: | headcut material rate parameters threshold friction velocity |
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