多沙河流岸边式泵站优化布置方案试验研究

Experimental study on optimal layout of pumping stations on bank of sediment-laden rivers

对黄河干流某宽浅多沙河段拟建泵站规划布置方案进行了泵站选址、取水头部布置、浮冰进闸模拟等的试验研究,试验结果表明:宽浅多沙河流岸边式取水泵站站址宜选在弯道顶冲点下游的送溜段;取水头部按迎水面与主流线平行的形式布置流态较为理想,采用叠梁闸形式可使洪枯水季节的取水安全及取水防沙得到最大限度的保证;岸边式取水泵站的进水流道会有浮冰进入,但数量远小于河道内的浮冰疏密度;站址区的岸坡防护与加固,应以不影响取水头部最佳水流条件为前提。

An experimental study was performed on the layout scheme of a pumping station to be built on the bank of a broad and shallow sediment-laden reach of the mainstream of the Yellow River,including the site selection,layout of water intake,simulation of floating ice flowing into the gate.The results show that: the station should be located on the downstream cross-over reach of bend vertex;the flow pattern at water intake is satisfactory if the upstream face is parallel to the main streamline;the adoption of stop log gates can ensure the safety of water intake and prevent sediment to the greatest extent in flood and low water seasons;some floating ice will flow into the inflow channel of the pumping station,but the quantity is far lower than ice density in the river course;the bank slope stabilization should be performed without affecting the optimal flow pattern at water intake.