平板闸门启闭力的设计中,往往发现闭门时光靠门叶自重不足以克服摩擦力,必须靠加重块、水柱重、自动抓梁、机械加压(或油压)等四种办法,作为压载强迫闸门下降。据资料介绍:上述四种强迫下门的措施,除水柱重可利用外,其它三种措施尽量不宜采用,因为它们结构复杂、启闭机容量加大,因而成本昂贵。因此,设计闸门时应优先考虑“自重下门”或“自重加水柱重下门”。为此,我们从闭门力、持住力、启门力分析入手,研究各项因素互相联系与制约,提出了二种确定门页底缘尺寸的计算公式,以此来实现“自重下门”或“自重加水 Flat gate opening and closing force of the design, often found that the time of closing the doors by leaf weight is not enough to overcome the friction, must rely on weight, water column weight, automatic grasping beam, mechanical pressure (or hydraulic) and other four methods, as Ballast forced gate down. According to the introduction of information, the above four measures for forcing the door down, except that the water column can be reused, are not suitable for the other three measures because of their complex structure and increased capacity of the hoist, so the cost is high. Therefore, the design gate should give priority to “self-weight under the door” or “weight plus water column weight under the door.” To this end, we start from the door-to-door, holding power, opening the door to analyze the relationship between the various factors and constraints, proposed two kinds of doors and leaves to determine the bottom edge of the size of the formula, in order to achieve “self- ”Or" self-respect and water