EXPERIMENTAL STUDY ON PIPING FAILURE OF NATURAL DAM
EXPERIMENTAL STUDY ON PIPING FAILURE OF NATURAL DAM
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DOI：
10.2208/jscejhe.67.i_157
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发表时间：
2011
影响因子：
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通讯作者：
R. Awal;H. Nakagawa;K. Kawaike;Y. Baba;Hao Zhang
中科院分区：
文献类型：
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作者：
R. Awal;H. Nakagawa;K. Kawaike;Y. Baba;Hao Zhang
天然大坝的破坏可能会发生多种破坏模式，包括漫顶、渗流或管涌、突然滑动等。天然大坝可能会因渗流或管涌而破坏，因为它们没有经过系统的压实，而且可能具有很高的孔隙率。目前，对渗流或管涌溃坝的机理和实测资料缺乏深入的认识。进行了广泛的实验室实验，以研究扩大的管道由于内部侵蚀和由此产生的流出过程线通过不同的大小的初始管，湖水位，湖水量，坡度和管道的位置。本文根据试验结果，指出了用于预测管涌过程线的简化模型的局限性，并为数值模型的验证提供了数据。试验结果表明，管道的初始尺寸、坡度和位置对洪峰流量的大小和出现时间有显著影响。
The failure of natural dam may occur with a variety of failure modes which includes overtopping, seepage or piping, sudden sliding etc. Natural dams may fail due to seepage or piping because they have not undergone systematic compaction and they may have high porosities. In-depth knowledge of the mechanism of the dam failures by seepage or piping and measured data are still lacking. Extensive laboratory experiments are carried out to study enlargement of the pipe due to internal erosion and resulting outflow hydrographs by varying size of initial pipe, lake water level, lake water volume, slope and location of the pipe. This paper highlights limitations of simplified models used to predict outflow hydrograph due to piping failure of the dam based on experimental results and provides data set for the validation of numerical model. Experimental results show that the initial size, slope and location of pipes have significant effects on magnitude and occurrence time of peak discharge.