潮汐河口闸下淤积及减淤措施试验研究

Sediment Deposition under Tidal Estuary Lock and Experimental Study on Deposition Reduction

结合盐灌船闸泥沙模型试验 ,研究闸下泥沙淤积规律 ,探讨减少闸下泥沙淤积的工程措施 .试验研究表明 :盐灌船闸修建后 ,下游引航道内的淤积是严重的 ;利用汛期部分水量由船闸集中放水冲沙 ,对清除下游引航道的泥沙淤积是有效的 ;在泄水冲沙同时采用机船拖耙等搅沙措施 ,能大幅度提高冲沙效率 ;改斜坡式断面为直立式断面 ,缩小下游引航道的过水面积 ,不仅能减少淤积量 ,而且有利于提高冲沙效率 .

In combination with model experiments for the Yanguan Lock, sediment deposition is studied and engineering measures for deposition reduction are discussed. The research shows that the construction of the Yanguan Lock results in serious sediment deposition,that the use of part of discharge during the flood season to scour deposition in the access channel is effective,and that the combination of flow scouring with machine agitating may help improve sediment scouring efficiency greatly.The change of the slope section to vertical section and the reduction of wetted cross-section may not only decrease deposition but also improve sediment scouring efficiency.