摘要
通过对新疆某水库工程上游围堰进行二维平面渗流分析计算,得出在不同悬挂式防渗墙深度下,围堰下游出逸点比降、单宽渗流量。计算成果表明:对于深厚覆盖层上的土石围堰,增加悬挂式防渗墙的深度,对减少渗流量、下游出逸点比降有一定的作用,但效果不明显。在满足围堰结构安全的前提下,适当的缩短了悬挂式防渗墙的深度,最终确定了悬挂式防渗墙合理深度为22m,对工程起到了节省投资、缩短工期的作用,为类似工程围堰防渗设计提供参考。
Through the two-dimensional plane seepage analysis and calculation of the upstream cofferdam of a certain reservoir project in Xinjiang,It is concluded that under the different depth of the concrete cutoff wall,the ratio of the outlet and the outlet of the cofferdam and the single width seepage flow.The calculation results show that For earth-rock cofferdams on deep overburden,increasing the depth of the concrete cutoff wall can reduce the seepage flow and the down-stream escape point ratio,but the effect is not obvious.On the premise of meeting the safety of cofferdam structure,the depth of concrete cutoff wall is shortened properly,and the reasonable depth of the concrete cutoff wall is determined to be 22 m,which can save investment and shorten the construction period.It provides reference for seepage control design of cofferdam in similar projects.
出处
《吉林水利》
2018年第11期25-28,共4页
Jilin Water Resources
关键词
深厚覆盖层
围堰
渗流量
稳定性分析
deep overburden
cofferdam
seepage discharge
stability analysis
