泥沙浓缩旋管清液排放口布置形式

摘要

In this paper, it is proposed a new type of water-sediment separation device named sediment concentrated spiral tube ( SCST) , which is used in hydraulic fill. To confirm layout form of clear liquid discharge port—key components of the device, several tentative of clear liquid discharge port of SCST were investigated by numerical simulation and physical experiment. Considering the engineering applicability and efficiency of concentration, this paper selected the outside discharge port, whose discharge pipe was perpendicular to the main pipe, as the recommended clear liquid discharge port for SCST. Overall, the results showed:SCST, with the selected layout form, not only could improve sediment concentration for hydraulic fill, but also reduced the content of fine particles, as well as improved the engineering properties of fill sediment.%为确定一种新型水力吹填用水沙分离装置———泥沙浓缩旋管关键部件清液排放口的布置形式，使用数值模拟与物理模型试验相结合的方法对初步拟定的几种清液排放口形式进行了研究，并综合考虑工程适用性与浓缩效率，选取垂直主管布置排放管的外排放口作为该装置清液排放口。结果表明，该排放口形式的泥沙浓缩旋管不但可以提高吹填造陆入场泥沙浓度，同时还会降低入场泥沙细颗粒含量，从而改善吹填泥沙的工程性质。