考虑出流与下游的连接,溢流堰的尾部常设反弧段。不论采用哪种消能方式,溢流堰堰面曲线与反弧段的连接只出现有斜直段和无斜直段两种情况。当溢流堰较低,下游水位较高(采用底流消能不经济)而需要设置较高的挑 Considering the outflow and the downstream connection, the tail of the weir is provided with an anti-arc section. No matter what kind of energy dissipation mode is adopted, the connection between the curve of the weir weir surface and the anti-arc section shows only two cases of inclined straight section and non-inclined straight section. When the weir is lower, the downstream water level is higher (using underflow energy dissipation is not economical), and the need to set a higher pick