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

摘要： 针对现阶段混凝土面板堆石坝面板挠度变形监测存在系统综合误差大、时空数据不连续的问题，提出了 将柔性测斜仪应用到面板挠度变形监测中的方法。该方法可准确得到混凝土面板高密度监测点的结果数据，能 更好地反映混凝土面板整体挠度变形状况。笔者主要介绍了柔性测斜仪的原理及特点、监测布置与仪器设备安 装埋设情况、主要监测数据分析等。由监测结果可见，蓄水期面板挠度时空分布连续性好，测值准确度高，挠度变 化及分布规律合理，较好地反映了蓄水期大坝面板挠度变形状况，说明柔性测斜仪适用于面板挠度变形监测，为 准确监测面板挠度提供了一种新手段。

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