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在研究三峡水利枢纽通航建筑物的时候,曾提出一种半水力式垂直升船机。这种升船机的主要特点是承船厢可以直接下水,无需修建下游闸首。因此,它对于下游水位变幅很大的枢纽,具有特殊的意义。三峡水利枢纽的通航建筑物需要解决枢纽施工期间和建成以后的通航问题。无论前者或是后者,都要克服上下游巨大的水位变化。在施工通航期
When studying the navigation structures of the Three Gorges Project, a semi-hydraulic vertical shiplift was proposed. The main feature of this lift ship is the direct entry of water into the hull without the need to construct a downstream brake head. Therefore, it has a special significance for the hub with large amplitude of downstream water level. The navigation structures of the Three Gorges Project need to solve the navigation problems during and after completion of the hub. Both the former and the latter must overcome the huge water level changes upstream and downstream. In the construction of navigation period