通过水工模型试验得出，在消能戽斗内设置掺气窄缝墩，调节水流结构，形成掺气窄缝戽流，对低堰消能是很有利的，并进而得出计算公式。试验结果表明掺气窄缝戽流具有消能效果显著，下淤冲刷深度与没有窄缝墩的戽斗消能相比，可减少冲恻深度６０％以上，可减少尾水的波度高度和长度１．２倍，降低下游的界限水深等优点，并适合在砂质软基河流上应用。 Through the hydraulic model test, it is concluded that it is advantageous to set up aerated narrow-gap pier in energy dissipation bucket to regulate the water flow structure and form aerated narrow slot slip stream, which is very beneficial to the energy dissipation of low weir. Then the formula is derived. The experimental results show that aeration narrow slot flow has a significant energy dissipation effect. The depth of scouring can be reduced by more than 60% compared with the scoop elimination without narrow pier, which can reduce the wave height and length 1.2 times, reducing the downstream limit of depth and other advantages, and suitable for use on sandy soft-based river.