引江济淮工程派河口船闸通航水流条件及改善措施

派河口船闸是引江济淮派河口枢纽重要组成部分,位于派河入巢湖口门段,建设条件复杂。综合已有工程、河道边界和相关规划,提出了复线船闸平面布置初拟方案。采用定床河工模型试验的技术手段对船闸下游引航道与口门区通航水流条件开展了详尽研究,探明了节制闸泄洪时下游通航水域纵向和横向表面流速、流态特征,分析了通航水流条件不满足规范要求的原因,指出可通过岸线平顺、新开泄洪分流通道和控制临界安全泄洪流量等措施进行改善。优化后的方案可满足设计要求,为工程设计和今后运行管理提供技术支撑。

Navigation flow condition and improvement measures of the Paihekou ship lock in water diversion project from the Yangzi River to the Huaihe River

The Paihekou ship lock is an important part of the Paihekou hub for diversion project from the Yangtze River to the Huaihe River.It is located at the entrance of the Paihe River into the Chaohu Lake and has complex construction conditions.Based on the existing engineering,river boundary,and related planning,a preliminary plan for the layout of the double-track ship lock is proposed.A detailed study of the navigable flow conditions in the downstream approach channel and the entrance area of the ship lock is carried out using the technical means of the fixed-bed river engineering model test.The longitudinal and transverse surface velocity and flow pattern characteristics of the downstream navigable water area when the check-gate releases flood water are analyzed.The reasons why the conditions do not meet the requirements of the specification are pointed out,and they could be improved by measures such as smoothing coastline,newly opened flood diversion channels,and control of critical and safe flood discharge.The optimized scheme can help meet the design requirements and provide technical support for engineering design and operation and management in the future.