关键词: 混凝土面板堆石坝, 柔性测斜仪, 挠度变形, 安全监测, 数据分析

Abstract: In order to solve the problems of large composite error and discontinuous spatiotemporal data in the  slab  deflection  monitoring  of concrete face rockfill  dam, the flexible  inclinometer is  applied, which can accurately obtain the data of high-density monitoring points on the concrete slab, and can bet ⁃ ter reflect the overall deflection status of the concrete slab. This paper mainly introduces the principle and characteristics of flexible inclinometer, monitoring layout, installation of the instrument and monitor ⁃ ing data analysis. Based on the monitoring results, the spatiotemporal distribution of slab deflection is continuous during the impounding period, the measurement accuracy is high, and the change and distri ⁃ bution law of deflection are reasonable. The results have well reflected the deflection status of dam slab during the impounding period, indicating that the flexible inclinometer is suitable for slab deflection monitoring, and providing a new method for accurately monitoring slab deflection.

Key words: concrete face rockfill dam, flexible inclinometer, deflection, safety monitoring, data analysis