Sanbanxi Hydropower Station Flood Discharge Building is abraded due to high-speed water erosion,thereby causing local over-flow surface concrete defects.New materials and new technology are successfully applied in Sanbanxi Hydropower Station Flood Discharge Building Defect Repair Construction. In the paper, defect repair construction technology and flows of concrete over-flow surface corrosion damage,concrete crack,etc.are summarized aiming at providing certain reference for similar projects in the future.%三板溪水电站泄洪建筑物在运行过程中受高速水流冲刷磨损，造成局部过流面混凝土缺陷。本文通过新材料、新工艺在三板溪水电站泄洪建筑物修补中的成功应用，总结了混凝土过流面冲蚀破坏、混凝土裂缝等缺陷修补施工工艺及流程，旨在为以后类似工程提供一定的参考。
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