论文部分内容阅读
杨房沟水电站工程施工导流采用围堰断流、隧洞导流方式,为进一步掌握施工初期导流阶段的水流条件,确定围堰和坝体的施工安全,进行了初期导流模型试验研究。通过模型试验,测试了导流隧洞的泄洪能力、水流流态、空化数及下游流速与河床的冲刷情况,验证导流隧洞过流安全。根据模型试验结果,进一步优化了围堰堰顶高程与导流隧洞进口的进水条件,为工程初期导流设计与施工组织提供了重要的指导作用。
In order to further understand the flow conditions at the diversion stage and determine the construction safety of the cofferdam and the dam, the diversion model of the diversion tunnel and diversion tunnel were adopted for the construction diversion of the Yangfanggou Hydropower Station. Through the model test, the discharge capacity, flow pattern, cavitation number and the downstream flow velocity of the diversion tunnel and the erosion of the riverbed were tested to verify the over-flow safety of the diversion tunnel. According to the results of the model test, the crest elevation of cofferdam and influent conditions at the inlet of diversion tunnel are further optimized, which provides an important guiding role for the design and construction of diversion at the initial stage of the project.