滩坑水电站工程施工导流采用一次围堰断流、隧洞导流的方式,上下游围堰均采用土石过水围堰型式,为进一步掌握施工导流各阶段的水流条件,确保围堰和坝体度汛安全,进行了过水围堰导流模型试验研究.通过模型试验,测试了导流隧洞和过水围堰的泄洪能力,测试了围堰、大坝过水流速、流态和导流隧洞的水流流态,验证了堰体和坝体过流保护措施.根据模型试验成果,进一步优化了围堰结构布置和上游围堰堰面保护措施,为工程导截流设计与施工组织提供了重要的指导作用. In order to further grasp the flow conditions at various stages of construction diversion, ensure the cofferdam and dam (dam) and the dam The study of diversion model test of overcadding weir has been carried out.Through the model test, the discharge capacity of the diversion tunnel and overcadding cofferdam is tested, the cofferdam, dam flow rate, flow regime and guide Flow tunnel, and verified the over-current protection measures of weir body and dam body.According to the results of model test, the structure arrangement of cofferdam and the protection measures of cofferdam of upstream cofferdam were further optimized, which provided the design and construction organization for engineering diversion and closure flow Important guiding role.