堰塞坝溯源冲刷规律研究
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摘要
为了进一步认识堰塞湖泄流过程中的溯源冲刷规律,参考唐家山堰塞湖设计了室内水槽试验。结合试验结果进行纵剖面形态演变模拟,得到的冲刷初期形态与实际情况吻合较好。对比分析了入库流量和坝体级配对溯源冲刷速度和累计溯源冲刷量的影响。结果表明:溯源冲刷速度和累计溯源冲刷量与入库流量正相关,与坝体粗沙含量反相关;冲刷速度随着时间的推进而减小;入库流量和坝体级配影响溃口形成的过程,总的累计溯源冲刷量在各种条件下相差不大。
For further comprehension of the retrogressive erosion regulation in the landslide dam-leakage-period,an indoor flume experiment was formulated based on the Tangjiashan barrier lake.Combing with the test results,the longitudinal profile simulation was carried out.The conclusion was drawn that the initial scour morphology was in good compliance with the actual situations.The comparison analysis on the inflow and dam gradation influencing the scour velocity and accumulative erosion was also carried out.The conclusion was drawn that: retrogressive erosion velocity and accumulative erosion were positively correlated with the inflow,negatively correlated with the coarse content in dam;scour velocity decreased with time;the process of breach-forming was affected by inflow and dam gradation;the final accumulative erosions in various conditions differed a bit.
For further comprehension of the retrogressive erosion regulation in the landslide dam-leakage-period,an indoor flume experiment was formulated based on the Tangjiashan barrier lake.Combing with the test results,the longitudinal profile simulation was carried out.The conclusion was drawn that the initial scour morphology was in good compliance with the actual situations.The comparison analysis on the inflow and dam gradation influencing the scour velocity and accumulative erosion was also carried out.The conclusion was drawn that: retrogressive erosion velocity and accumulative erosion were positively correlated with the inflow,negatively correlated with the coarse content in dam;scour velocity decreased with time;the process of breach-forming was affected by inflow and dam gradation;the final accumulative erosions in various conditions differed a bit.
引文
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[7]曹叔尤.细沙淤积的溯源冲刷试验研究[C]//水利水电科学研究院.中国水利水电科学研究院科学研究论文集:第11集.北京:水利电力出版社,1983:168-183.Cao Shuyou.The Study of Head-Cutting Experiment on Sand De-posit[C]//The 11th Proceedings of China Institute of Water Re-sources and Hydropower Research.Beijing:Hydraulic and ElectricPress,1983:168-183.
[8]巨江.溯源冲刷的计算方法及其应用[J].泥沙研究,1990,12(1):30-39.Ju Jiang.The calculation method and apply of head-cutting[J].Sediment Research,1990,12(1):30-39.
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[2]罗利环,黄尔,张文江.堰塞坝冲刷泄流平衡形态的影响因素[J].人民黄河,2010,32(11):126-127.Luo Lihuan,Huang Er,Zhang Wenjiang.The factors influence theequilibrium form in the scour and drainage of landslide dam[J].Yellow River,2010,32(11):126-127.
[3]陈树群,陈联光.溯源冲刷实验观测分析[J].水土保持研究,1999,6(3):120-129.Chen Shuqun,Chen Lianguang.Observation and analysis of head-cutting experiment[J].Research of Soil and Water Conservation,1999,6(3):120-129.
[4]彭润泽,常德礼,白荣隆,等.推移质三角洲溯源冲刷计算公式[J].泥沙研究,1981,3(1):14-24.Peng Runze,Chang Deli,Bai Ronglong,et al.Formulas for cal-culating headward erosion on a bed load-delta[J].Journal of Sed-iment Research,1981,3(1):14-24.
[5]彭润泽,张振秋.水库溯源冲刷的控制利用[J].水利学报,1985,1(1):11-21.Peng Runze,Zhang Zhenqiu.Control and utilize of reservoir head-cutting[J].Chinese Journal of Water Conservancy,1985,1(1):11-21.
[6]彭润泽,牛景辉.推移质溯源冲刷的数值计算[J].泥沙研究,1987,9(3):71-80.Peng Runze,Niu Jinghui.Numerical calculation of bed load-head-cutting[J].Journal of Sediment Research,1987,9(3):71-80.
[7]曹叔尤.细沙淤积的溯源冲刷试验研究[C]//水利水电科学研究院.中国水利水电科学研究院科学研究论文集:第11集.北京:水利电力出版社,1983:168-183.Cao Shuyou.The Study of Head-Cutting Experiment on Sand De-posit[C]//The 11th Proceedings of China Institute of Water Re-sources and Hydropower Research.Beijing:Hydraulic and ElectricPress,1983:168-183.
[8]巨江.溯源冲刷的计算方法及其应用[J].泥沙研究,1990,12(1):30-39.Ju Jiang.The calculation method and apply of head-cutting[J].Sediment Research,1990,12(1):30-39.
[9]Begin Ze’ev B,Schumm S A,Meyer D F.Knickpoint migrationdue to base level lowering[J].Journal of the Waterway PortCoastal and Ocean Division,1980,106(3):369-388.
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