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三峡工程大江截流是目前世界上截流流量最大，水深最大的截流工程。其中，有许多技术难题需要解决。由于大江截流的特殊性及重要性，施工期河势边界、水流流态异常复杂，致使常规数学模型计算分析受到限制。为此，物理模型试验研究成为解决大江截流设计及施工中有关问题的主要手段。研究成果为大江胜利实现截流打下了坚实基础。
The closure of the Three Gorges Project is the largest river closure flow in the world, the largest water depth closure project. Among them, there are many technical problems to be solved. Due to the particularity and importance of the river closure, the river flow boundary during the construction period has an extremely complicated water flow pattern, which limits the calculation and analysis of conventional mathematical models. Therefore, the physical model test has become the main method to solve the problems in the design and construction of the main river closure. The research results laid a solid foundation for the victory of the Grand River to achieve closure.