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根据不同比尺的系列缝隙模型试验探讨了模型比尺问题；在１∶２０的模型上观测了水流撞击边墙的起始点位置及水翅（包括缝隙流）的飞溅高度；指出了闸门局部开启时水流顶部扩散用增大的原因及其计算公式；观测计算了水流对边墙的冲击荷载及水翅对门铰支承梁的冲击荷载；同时还指出了在水流对边墙的冲击荷载中，缝隙流所占的比重较小，另外，在缝隙模型试验中还论证了增设辅助止水的必要性。
The model scale problem was discussed according to the series of slit model tests with different scales. The starting point of water striking the side wall and the splash height of the water fin (including the slit flow) were observed on 1:20 model. The reason for the increase of the flow at the top of the water flow and its calculation formula were calculated. The impact load of water flow on the side wall and the impact load of the water-wing on the hinged support beam were observed and calculated. At the same time, it was pointed out that in the impact load of water flow on the side wall, The proportion of flow is small. In addition, the necessity of adding auxiliary water stop is demonstrated in the crack model test.