楼庄子水库溢洪洞体型优化试验研究

针对楼庄子水库工程溢洪洞原方案存在的问题,采用物理水工模型试验方法,对原挑流鼻坎提出了横向扩散和竖向扩散两种消能方案,通过对比分析挑坎水舌形态和下游河道冲淤形态,最终认为横向扩散消能方案优于竖向扩散方案。进一步分析了挑坎横向扩散方案的扩散角、挑距、冲淤形态等特性规律,确定适度扩散角舌形鼻坎方案为推荐方案。试验结果表明:舌形挑流鼻坎形成的水舌连续光滑、扩散充分,入水范围增大而单宽流量减小,下游河道冲淤明显减轻。试验结果可为同类工程优化结构形式及设计应用提供参考。

Experimental study on spillway hole shape optimization of Louzhuangzi Reservoir

To solve the problem of original discharge tunnel of Louzhuangzi Reservoir Project, the lateral energy dissipation and vertical energy dissipation schemes were proposed for the original picking nose scheme, using the physical hydraulic model test method. By comparing the water tongue morphology and downstream river channel scouring and silting form, the lateral diffusion energy dissipation scheme was found better than the vertical diffusion scheme. Furthering analysis the characteristics of the diffusion angle, the pitch, the scouring and silting morphology of the lateral diffusion scheme resulted the recommended scheme is the moderate diffusion angle tongue-shaped nasal ridge scheme. The results showed that the tongue-type jet buckets can form a water tongue that is continuous and smooth, and the diffusion is sufficient. In addition, it increased the water inlet area and reduced the single width flow and the downstream river channel erosion. The results can provide reference for the optimization of structural forms and design applications of similar projects.