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针对某电站二期大江截流具有戗堤龙口落差大、水流流速高、河床抗冲能力低、地质条件复杂等特点,利用水工模型试验获得了采用不同抛投料截流时的最大流速、单宽流量、单宽功率和上下游落差等龙口水力特性,提出结合当地材料同时配合一定比例大粒径材料进行截流合龙的较为经济合理的抛投方式,确定了不同抛投料投放位置、强度、次序等截流施工参数,解决了实际工程截流面临的难题。
Aiming at the characteristics of the second-stage river closure of a hydropower station, such as the large drop-length at the embankment, high flow velocity, low riverbed impact resistance and complex geological conditions, the maximum flow velocity, single-wide flow rate , Single-width power and the upper and lower reaches of the gap, such as the Longkou hydraulic characteristics of the proposed local materials combined with a certain proportion of large-size materials to cut off the closure of a more economical and reasonable throwing way to determine the different throwing material delivery position, intensity, order, such as closure Construction parameters to solve the practical engineering problems facing the closure.