关键词: 涂层减糙技术, SK单组分聚脲涂层, 糙率

Abstract: Most of the irrigation projects in China were built between 1950s and 1970s. Since the concrete structures are aging and out of repair, the safety of irrigation area is threatened and the irrigation and drainage capacity is seriously reduced, which has resulted in a poorer benefit of irrigation areas. This paper presents a new roughness reduction technology for aqueduct based on SK single-component polyurea coating. By indoor experimental study of the roughness characteristics of the materials, combined with in-situ hydraulic observation and calculation simulation of application, various fluid dynamics changes and flow increase of aqueduct after roughness reduction by coating are comprehensively evaluated. The application has improved the operation benefits significantly, which provides scientific and technological support as well as good reference for the upgrading and innovation of water conveyance projects in large-scale irrigation areas in China.

Key words: coating roughness reduction technology, SK single-component polyurea, roughness