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堰塞坝溯源冲刷规律研究

DOI: 10.3969/j.issn.1674-0696.2013.02.23, PP. 280-284

Keywords: 堰塞坝,溯源冲刷,纵剖面形态,冲刷速度,累计冲刷,landslidedam,retrogressiveerosion,longitudinalprofile,scourvelocity,accumulativeerosion

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Abstract:

:?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。

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