薄拱坝坝身泄洪布置及消能效果的研究

The study of the thin-arch-dam layout for flood spillway and the effect of energy dissipation

薄拱坝坝身泄洪方式,一般采用表、中、深孔单独泄洪或联合泄洪等方式,故有单层、双层和多层射流流态,水舌竖向冲击消能方式是一种较好的新型消能工,并已被试验和工程实践运行证明,具有很好的消能效果。运用新型消能工使加大薄拱坝坝身泄洪能力成为可能。

For the thin-arch-dam flood spilling, general- ly surface-hole, medium-hole or deep-hole flood spilling are individually or jointly used. Then there are single- layer, double-layer and multiple-layer jet flow patterns. Water-tone-vertical-impact energy dissipation is a very good new energy dissipator and has been experimental- ly and Engineering-practically proved to provide signifi- cant effect of energy dissipation. The use of new energy dissipator makes it possible for increased flood dis- charge by a thin-arch-dam.