某高面板坝光纤陀螺仪监测成果可信度评判  

Reliability Evaluation of Fiber-optic Gyroscope Monitoring Results in a High CFRD

作　　者：吕高峰 朱锦杰 LU Gaofeng;ZHU Jinjie(Hangzhou National Hydro Dam Safety and Emergency Tech Cente Co.,Ltd.,Hangzhou 311122,Zhejiang,China)

机构地区：[1]杭州国家水电站大坝安全和应急工程技术中心有限公司

出　　处：《水力发电》2020年第2期119-122,共4页Water Power

摘　　要：某高面板堆石坝面板挠度采用光纤陀螺仪进行监测,在坝体内部也埋设光纤陀螺仪配合水管式沉降仪进行辅助坝体沉降监测。通过光纤陀螺仪数据处理、同类工程类比及与大坝其他监测仪器进行对比分析,对光纤陀螺仪数据可信度进行综合评判,得出以下结论:光纤陀螺仪获取的面板挠度量值上大于其他同类工程,大于经验公式,也大于邻近面板垫层料内水管式沉降仪和引张线水平位移计矢量计算得到的成果;光纤陀螺仪获取的2015年的沉降速率大于同时段同位置的水管式沉降仪、坝顶表面变形的沉降速率,不符合一般规律。因此,该工程的光纤陀螺仪测值可信度不高。The deflection of a high CFRD is monitored by fiber-optic gyroscope.In the interior of the dam,the fiber-optic gyroscope is also embedded with the water tube settlement gauge to monitor the settlement of dam.Through the data processing of fiber-optic gyroscope,similar engineering analogy and comparison with other monitoring instruments of the dam,the data reliability of the fiber-optic gyroscope is evaluated synthetically,and the following conclusions are obtained:(a)the deflection of the panel obtained by the fiber-optic gyroscope is larger than that of other similar projects,is larger than the calculation results of empirical formula,and is also larger than the results of vector calculation of cushion material internal water tube settlement gauge and tension line horizontal displacement;and(b)the settlement rate of the fiber-optic gyroscope in 2015 is greater than that of the same position of the water tube settlement gauge and the deformation of dam top,which is not in accordance with general rule.Therefore,the reliability of the fiber-optic gyroscope measurement in this project is not high.

关 键 词：高面板坝 光纤陀螺仪 监测 挠度 沉降 水管式沉降仪 可信度 

分 类 号：TV698.1[水利工程—水利水电工程]