宽浅河道低水头水电枢纽口门区通航水流条件研究  

Navigable flow conditions in gate area of low water head hydropower project in wide shallow riverway

作　　者：刘圣凡 童中山[1] LIU Sheng-fan;TONG Zhong-shan(Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing 210029,China)

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029

出　　处：《水运工程》2018年第9期124-127,160,共5页Port & Waterway Engineering

摘　　要：根据重力相似准则,采用比尺为1∶100的整体模型,进行某宽浅河道低水头水电枢纽口门区的通航安全性研究。采用ADV三维流速测量系统进行流速测量;采用标准矩形量水堰控制模型流量;采用差动式尾门调节模型水位。由于河道地形及枢纽布置的原因,上游口门区流速过大,下游口门区形成大范围回流。通过扩大河道过流面积,移除下游河道中心连续小岛,增加闸孔等措施,减小下泄水流流速,改善河道整体水流状态;通过加长导航墙,改变导航墙透水面积,优化口门区域地形等措施极大地改善了船闸上下游引航道及口门区通航水流条件,确保过闸船舶的安全。According to the criterion of gravity similarity,we study the navigation safety of the gate area of a low water head hydropower project in a wide shallow riverway by using the overall model with a scale of 1 100.We use the ADV velocity measurement system to measure the flow velocity,control the flow rate by a standard water weir,and adjust the water level of the model by a differential tail gate.Because of the layout of the river terrain and the hydropower project,the flow velocity in the entrance area of the upstream channel is too large and the downstream forms a large range reflux.In the experiment,discharge velocity is reduced,and the overall water flow in the river is improved by the measures,such as expanding the dredging area,removing two downstream islands and increasing sluice gates.The navigation flow condition of the up and downstream channel and its entrance area of the ship lock are greatly improved by prolonging the navigation wall,changing the water permeability of the navigation wall and optimizing the topography of the channel area,which can ensure the safety of the ship.

关 键 词：宽浅河道 低水头 水电枢纽 通航 优化 

分 类 号：U641.1[交通运输工程—船舶及航道工程]