新沂河海口控制工程排沙设施对泥沙淤积影响分析  

Analysis on the influence of sediment discharge facilities of Haikou Control Project of Xinyi River on sediment deposition

作　　者：柳豹 LIU Bao(Jiangsu Huaishuxinhe Management Office,Huai’an 213000,China)

机构地区：[1]江苏省淮沭新河管理处,江苏淮安223001

出　　处：《江苏水利》2022年第7期11-15,共5页Jiangsu Water Resources

摘　　要：为研究新沂河海口控制工程排沙渠道工程清淤降沙影响因素,设计开展水流因素与结构因素影响下水沙特征。流量参数与含沙量具有负相关关系,流量每增大1.5 L/s,深泓闸下游、排沙设施末端处含沙量可降低6.2%、9.3%;控制入海口处流量,才可防护泥沙淤积影响。泥沙粒径愈大,则含沙量愈高;控制泥沙粒径有助于影响泥沙运动作用,改变其悬浮沉降关系。水位与流速具有正相关关系,但深泓闸下游处流速水平高于排沙渠中部,两者差幅为27.5%~47.6%;排沙板设计高度越大,流速愈高,闸下游处流速受设计高度影响敏感度高于渠道末端处。研究成果可为排沙清淤工程设计优化及影响性分析提供一定参考。In order to study the influencing factors of dredging and sedimentation of the Xinyi River Haikou Control Engineering Sediment Discharge Channel Project,the characteristics of water and sediment under the influence of flow factors and structural factors are designed and carried out.There is a negative correlation between discharge parameters and sediment concentration.For every 1.5 L/s increase in flow rate,the sediment concentration at the downstream of Shenhong Sluice and at the end of the sediment discharge facilities can be reduced by 6.2%and 9.3%;Only by controlling the flow at the sea inlet can the impact of sediment deposition be prevented.The larger the particle size of the sediment,the higher the sediment concentration;the control of the particle size of the sediment will help to affect the movement of the sediment and change its suspension-settling relationship.There is a positive correlation between water level and velocity,but the velocity level at the downstream of Shenhong sluice is higher than that in the middle of the sediment discharge channel,and the difference between them is 27.5%~47.6%.The higher the design height of the sand discharge plate,the higher the flow velocity.The sensitivity of the flow velocity at the downstream of the gate is higher than that at the end of the channel.The results can provide some reference for the design optimization and impact analysis of sediment discharge and dredging engineering.

关 键 词：新沂河 排沙设施 含沙量 流速 

分 类 号：TV697.1[水利工程—水利水电工程]