针对围堰防护方式对上游围堰过流稳定性影响问题,以猴子岩水电站过水围堰为例,采用子堰防护和自溃式子堰两种围堰防护方式进行对比试验,量测了上游围堰范围内水力学特性指标,检验了不同的围堰防护方式对围堰过流稳定性的影响。结果表明,采用自溃式子堰方式可降低上游围堰上下游水位差、减小水跃跃首最大流速、减缓堰后冲坑坡度,更有效维持上游围堰的过流稳定,并能安全渡汛。 Aiming at the influence of the cofferdam protection mode on the overcurrent stability of the upstream cofferdam, taking the cofferdam of the Monkey Rock Hydropower Station as an example, the cofferdam protection and self-rupture type weir cofferdam are adopted to conduct the comparative tests. The influence of different cofferdam protection methods on overcurrent stability of cofferdam was tested on the hydraulic characteristics of upstream cofferdam. The results show that the self-rupture type weir can reduce the upstream and downstream upstream cofferdam water level difference, reduce the maximum velocity of water jump, reduce the slope of the weir, and more effectively maintain the upstream cofferdam overcurrent stability and safety Flooding.