洞式溢洪道与自然冲沟组合的泄洪消能结构设计优化研究

Design and Optimization of Flood Discharge and Energy Dissipation Structure Combined with Cave Spillway and Natural Gully

通过水力学计算和水工模型试验,研究了竹寿水库扩建工程侧堰洞式溢洪道与自然冲沟内设台阶的泄洪消能结构水力特性。研究发现:泄大流量时,洞式溢洪道侧堰泄流能力略小于理论计算值,理论计算拟定的消力池结构尺寸较合理,冲沟内消能台阶转弯段的反超坡度需大于设计初拟值,优化调整后的洞式溢洪道与消能台阶组合泄洪消能结构对流态的控制较好。

Through hydraulic calculations and hydraulic model tests,the hydraulic characteristics of the flood discharge and energy dissipation structure combined by side weir cave spillway and steps in the natural gully of the Zhushou Reservoir Expansion Project are studied.It is found that the discharge capacity of the side weir of the cave spillway is slightly less than the theoretical calculation value,the size of the proposed stilling basin is reasonable,the reverse slope of the turning section of the energy dissipation step in the gully needs to be greater than the initial design value,and the optimized and adjusted cave spillway and energy dissipation steps has a better control of the flow regime.