糯扎渡水电站溢洪道底板抗冲磨防空蚀混凝土表面平整度施工经验

Experience in smoothing concrete surface of spillway floor against erosion and cavitation for Nuozhadu hydropower station

糯扎渡水电站溢洪道工程具有泄量大、水头高、高流速等特点,泄槽段底板抹面面积大,底板平整度质量要求高。结合糯扎渡溢洪道工程特点,采取针对性的施工方案,从滑模、抹面以及保护工艺入手加强管理,其平整度满足了设计要求,为同类工程积累了经验。

For Nuozhadu hydropower station, its spillway is characterized by large discharge, high head and high velocity flow, the finish area of chute section floor is large, and high quality is required for floor smoothness. Based on the above features, specific construction scheme is adopted and management is strengthened in respect of slip form, surface finishing and protection technique so that the smooth- ness meets the design requirements, which provides references for similar projects.