保证生态流量下乐昌峡弧形工作闸门稳定性研究

Study on stability of radial service gate of Lechangxia Water Control Project under condition of guaranteeing eco-flow

为保护乐昌峡水利枢纽下游丰富的动、植物资源以及满足社会、经济对水量的需求,基于模型试验并结合数值模拟研究了保证该水利枢纽下游生态流量时的弧形工作闸门与两侧闸墩的水动力特性。结果表明,溢洪道与放空底孔弧形工作闸门在下泄生态流量时动位移都可以忽略不计,两侧闸墩的振幅也很小,可以满足稳定性的要求。研究成果为保障枢纽下泄生态流量并同时保证大坝乃至水利枢纽的安全性提供了科学依据。

In order to protect abundant flora and fauna at the downstream of Lechangxia Water Control Project and satisfy the water demand from the social and economic development therein,the hydrodynamic characteristics at the radial service gate and both the side gate piers under the condition of guaranteeing eco-flow at the downstream of the project are studied on the basis of the relevant model test combined with numerical simulation. The result shows that the dynamic displacements of the radial service gates for both the spillway and the bottom discharge outlet during discharging the eco-flow can be neglected along with small amplitudes of both the side piers,and then can meet the requirement of stability concerned as well. The study result can lay a scientific basis for guaranteeing the eco-flow at the downstream of the project and the safety of the whole water control project.