金沟河引水枢纽分水排沙试验研究

Experimental Research of Diving Water and Desilting in Jingou River Water Diversion Project

对金沟河引水枢纽设计方案进行了系列模型输沙试验,观察了泥沙在上游河段、泄洪闸、冲沙闸及进水闸前后的淤积情况及泄洪闸、冲沙闸的闸门运行方式。结果表明:金沟河引水枢纽总体布置基本合理,主要存在闸墩、上游冲沙槽及导流堤高程不够,进水闸和冲沙闸底板相对高差偏大,上游冲沙槽内淤积严重,下游冲沙槽边墙高度不够等问题。经过分析,对模型进行了相应修改,取得了满意的效果,满足了引水、防沙及泄洪的要求。

A series of desihing experiment in model aiming at design ahernatives on Jingou River diversion project were carried out to observe the sediment deposition in the upstream, floodgate, flushing sluice, and intake before and after, and analyzed gate operational mode of floodgate and flushing sluice, the results show that： the general arrangement of Jingou River water diversion project is reasonable, but still exists ome problems, which arc the insufficient elevation of gate piers, sediment flushing tank in upstream and diversion dyke, relative height comparatively bigger in base plate of intake and flushing slui6e, serious siltation in sediment flushing groove in upstream, and insufficient height in side wall of sediment flushing groove in downstream. After the analysis, the model has been modified accordingly, and achieved satisfactory results, which meet the requirements of water diversion, sand protection and flood discharge.