水布垭水电站面板挠度监测方法比较

Comparison and Analysis of Face Slab Deflection Monitoring Methods in Shuibuya Dam

水布垭水电站堆石坝面板采用固定式电解液倾斜仪与光纤陀螺仪两种方式监测其挠度变化。从监测结果来看,两种方式相关性低,陀螺仪测值变化稳定,而倾斜仪测值波动大。电解液倾斜仪能克服高水压的影响,但在高压环境下耐久性差,测点间隔大且不连续;光纤陀螺仪灵敏度高,抗干扰性强,数据精度高,为高面板堆石坝挠度监测提供了发展前景。

The fixed electrolyte inclinometer and fiber optic gyroscope are used in the face slab deflection monitoring of Shuibuya CFRD respectively. The analyze of monitoring results show that the correlation of monitoring data of two kind of instruments is lower, and the monitoring data of fiber optic gyroscope are stable while a larger fluctuation for the fixed electrolyte inclinometer. The electrolyte incfinometer can overcome the impact of high water pressure, but has a poor durability and a large-interval and non-continuous measurement in high-pressure environment. The fiber optic gyroscope has higher sensitivity, stronger anti-interference and higher accuracy, and is more appropriate for the deflection monitoring of high CFRDs.