介决高壩通航问题采用的通航建筑物不外是船闸和升船机两种。从建筑结构的施工难易,坚固耐久,安全程度及钢材的消耗等方面来谈,应以多级船闸(两级以上)作为通航建筑物的主要比较方案。多级船闸的线数可根据该河段的货物运输频繁程度定为单线、双线,甚至三线。多级船闸的级数划分或各级水头的大小,应根 Navigational structures to solve the problem of navigating the dam are nothing more than shiplocks and liftcrafts. From the construction of the building is difficult, durable, the degree of safety and the consumption of steel, etc., should be multi-stage ship lock (more than two) as the main comparison of navigable buildings. The number of multi-stage locks can be set according to the frequency of the river section of the frequency of single-lane, two-lane, or even three lines. Multi-level ship lock division or the level of head size, should be root