摘要
为了进一步研究插板透水丁坝拦沙作用,通过数值模拟计算分析不同因素(流量、粒径、有效坝长)下插板透水丁坝坝前河道断面含沙量变化分布规律.结果表明:粗颗粒泥沙含沙量表现为先增大后减小,细颗粒泥沙含沙量先减小后增大;随着流量增大,泥沙含沙量减小,拦沙比减小;随着插板透水丁坝有效坝长增加,丁坝阻水缓流作用增强,拦沙量升高;插板透水丁坝具有拦粗排细的分选作用和良好的拦沙作用效果.插板透水丁坝拦沙作用效果显著,同时也是解决干旱区内陆河水沙治理的一种有效方法.
In order to study the sediment retention effect of permeable sheet piling spur dike with inserted plates,the influence of different factors(flow,particle size,effective dam length)on the distribution of sediment content in the river section in front of the permeable sheet piling spur dike is analyzed by numerical simulation.The result shows that the sediment concentration of coarse-grained sediment increases first and then decreases,and that of fine-grained sediment decreases first and then increases.With the increase of flow,the sediment concentration decreases and the sediment retention ratio decreases.With the increase of effective dam length,the water blocking and slow flow effect of spur dike increases,and the sediment retention capacity increases.The permeable sheet piling spur dike has the separation function of retaining coarse particles and discharging fine particles and good sand retention effect.The permeable sheet piling spur dike has a significant effect on sediment control,and it is also an effective method to solve the problem of inland river sediment control in arid area.
作者
毛亮
李玉建
李鹤
耿义鑫
MAO Liang;LI Yujian;LI He;GENG Yixin(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Survey and Design Institute of Water Resources and Hydropower,Urumqi 830000,China)
出处
《河南科学》
2021年第7期1099-1105,共7页
Henan Science
基金
国家自然科学基金资助项目(51469032)。
关键词
插板透水丁坝
拦沙作用
含沙量
数值模拟
permeable sheet piling spur dike
sediment retaining effect
sediment concentration
numerical simulation
