滨海山丘区挡潮排涝水闸设计规模论证

Design Scale Demonstration of Tidal Retaining and Drainage Gate in the Coastal Hilly Area

沿海地区的排涝水闸受潮汐影响,水闸规模与流域面积、地形地貌、河网槽蓄容量、消能防冲条件、潮型等因素密切相关,须综合分析确定闸室宽度、闸底高程和单宽流量,发挥最佳经济效益。通过洋屿港水闸工程的应用实例,分析闽江下游滨海山丘区挡潮排涝水闸的设计条件,采用滑动调蓄演算方法,比选了多种水闸规模,对过闸单宽流量、闸宽与河道宽度比例、闸宽与流域面积比例等指标进行分析,选取合适的水闸宽度,并与类似工程进行对比,总结该类型水闸的设计特点。

The drainage gate in coastal areas is affected by tide. The scale of gate is closely related to such factors as basin area,landform,river channel storage capacity,energy dissipation and erosion prevention conditions and tidal pattern. It is necessary to comprehensively analyze and determine the width of gate chamber,sluice bottom elevation and unit width flow so as to maximize economic benefits. Through the application example of Yangyu Port Gate Project,this paper analyzes the design conditions of tide retaining and drainage gate in the coastal hilly area of the lower reaches of the Minjiang River,uses the sliding storage calculus method,conducts comparison among a variety of gate scales,analyzes the indexes such as the discharge per unit width,the ratio of gate width to river width,and the ratio of gate width to watershed area,selects the appropriate gate width,and compares it with similar projects. The design characteristics of this type of gate are summarized.