深溪沟水电站泥沙模型试验研究

Experimental Research on the Sediment Model of the Shenxigou Hydropower Station

针对深溪沟水电站泥沙淤积问题进行了相应的物理模型试验研究。在验证厂前导沙坎拦沙效果的基础上,分别研究了在电站正常运行结合泄洪冲沙以及关闭电站敞泄拉沙2种枢纽调度方式下的库区泥沙淤积物的冲刷效果。试验结果表明:关闭电站敞泄拉沙时库区泥沙淤积物被大量冲刷,河床高程明显降低,尤以来流量6 290 m3/s和3 300m3/s 2个级别的冲刷效果最好。

The sediment accumulation of the Shenxigou Hydropower Station is studied and relevant physical modeling experiments are carried out.Based on the validation of the detention effect on sediment of the sand-guide sill before the power station,this paper is an attempt to study the scouring effect on sediment situation of the reservoir with two scheduling modes： sand sluicing with normal operation of the power station,and sand sluicing with closure of the power station.The experimental results show that on the latter scheduling mode,more sediments are scoured,especially with discharge scales Q=6 290 m3/s and Q=3 300 m3/s and the elevation of the river bed becomes noticeably lower.