某取水工程防沙设计及试验验证

Sediment control design and experimental verification for a water intake project

通过河工模型试验,为伊拉克萨拉哈丁燃油气电站选取最佳的取水口位置,并为取水工程进行防沙设计。试验在两个模型平台上进行,根据全河段变态模型试验各工况下的试验结果,选择最佳的取水口位置;通过局部河段正态模型试验,确定取水口防沙具体细部设计,并对防沙效果进行验证。试验表明,取水口位置确定后,选择合理的侧向取水角,通过明渠口门处的一次性疏浚及两层次拦沙坎等防沙措施,能够有效防止推移质及悬移质进入取水明渠,并取得明渠口门前主河道"门前清"的效果。

Making use of model tests of river engineering, a most reasonable location of the water intake is determined for Iraqi Salah A1-Din Oil-Gas Fired Power Plant and some sediment control measures are designed as well. The model tests are carried out on two model platforms. According to the results of the whole-reach abnormal tests, the best location of the water intake is selected. Through the local normal model tests, the detailed structure of the sediment control measures is designed and the effects are verified. The model test results show that after determining the location of the water intake and the reasonable diversion angle, disposable riverbed dredging near the entrance of the water intake and taking sediment control measures as the sand traps can effectively prevent both the bed load and the suspended load entering into the diversion open channel and ensure that there has no sediment deposit at the entrance of the water intake. Such sediment control structures can protect the intake from erosion damage and keep it in a good condition of safety operation for a long time. This design experience can be taken as the reference for the similar works of the basin and for other intake structures.