水电站的弧形闸门为焊接结构，在施焊过程中容易产生变形。通过对门叶变形量的分析，计算了门叶沿中性轴的总体变形趋势及理论近似应变值，确定了门叶施焊前其转动半径的修正量。在闸门门叶备料时，以修正后的转动半径为实际放样尺寸，并在实际组焊时进行焊接变形控制和监测，从而确保了弧形闸门的制作 The arc gate of a hydropower station is a welded structure, which is prone to deformation during the welding process. Through the analysis of door leaf deformation, the overall deformation trend along the neutral axis of the door leaf and the theoretical approximate strain value are calculated, and the correction amount of the rotation radius before door leaf welding is determined. In the gate leaf preparation, with the revised radius of rotation as the actual size of the loft, and in the actual welding welding deformation control and monitoring, thus ensuring the production of the arc gate