沙溪口水电站下游通航明渠布置原则研究  

Research on layout principles of open channel downstream the Shaxikou dam

作　　者：张明[1] 王义安 郑伟 ZHANG Ming;WANG Yi-an;ZHENG Wei(Tianjin Research Institute of Water Transport Engineering,Key Laboratory of Engineering Sediment,Ministry of Transport,Tianjin 300456,China;Fujian Port ＆ Waterway Investigation ＆ Design Institute,Fuzhou 350002,China)

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456 [2]福建省港航勘察设计研究院,福州350002

出　　处：《水道港口》2018年第3期324-329,共6页Journal of Waterway and Harbor

摘　　要：明渠平面布置型式对流速、水位等水流特性具有重要影响,关系到航道整治的效果。以沙溪口坝下航道整治工程为例,研究了明渠边坡、出口型式、外接丁顺坝、明渠宽度、明渠长度等因素对明渠内水流特性的影响,提出了作为雍水方案条件下通航明渠的布置原则:(1)通航明渠距离雍水目标区域不宜太远,且一般适用于枯水河宽可缩窄河段;(2)应沿主流方向布置,明渠内外地形应有利于水流的平顺;(3)出口应采用对称型式,出口两侧地形应避免大的起伏。通过合理布置明渠和对明渠附近河槽形态进行整治,可将沙溪口船闸下游近坝段水位抬高至设计最低通航水位。The navigable open channel layout has an important impact on the flow characteristics such as water level and current velocity,which relate to the effect of waterway regulation engineering.Taking the waterway regulation engineering downstream the Shaxikou dam as an example,this paper studied the influences on flow characteristics of open channel resulted from various factors including the open channel slope,export type,external spur-dike and longitudinal dike,width,and length,and proposed the layout principles of navigable open channel under the condition of hammed water.（1） The distance between the navigable open channel and hammed water target should not be too far away,and is generally suitable for the narrowed low-water channel.（2） The axis of the navigable open channel should be along the mainstream direction,the channel topography is conducive to the smooth flow;（3） The symmetrical form should be adopted for the export,and great topographic inequality should be avoided on both sides of the outlet.The water level downstream Shaxikou shiplock could be raised to the design lowest navigable stage by waterway regulation engineering.

关 键 词：沙溪 明渠 布置原则 水流特性 航道整治 

分 类 号：U617[交通运输工程—船舶及航道工程]