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Development and In Situ Application of Deformation Monitoring System for Concrete-Face Rockfill Dam Using Fiber Optic Gyroscope

机译:光纤陀螺混凝土面板堆石坝变形监测系统的开发与现场应用

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摘要

Deformation monitoring is of importance to ensure the operation status of concrete-face rockfill dams (CFRD). This paper reported a novel fiber optic gyroscope (FOG) monitoring system for continuously monitoring face slab deformation of CFRD, which consisted of a permanent monitoring pipeline and a sensing vehicle. The monitoring pipeline was made of steel pipes and polyvinyl chloride polymer connectors, which was embedded in a slot of the crushing-type sidewall beneath the concrete face slab of CFRD, forming a permanent monitoring channel. The sensing vehicle was equipped with a high-precision FOG sensor. A low-pass filter was designed to eliminate the vibration noise of the angular velocities of the sensing vehicle during the monitoring process. An in situ test was carried out on the Shuibuya dam, the highest CFRD in the world. The measurements of the FOG monitoring system agreed well with traditional instrument measurements, serving as validation of the system. The FOG monitoring system has the advantages of excellent repeatability, long service life, distributed monitoring, and automatic measurement.
机译:变形监测对于确保混凝土面板堆石坝(CFRD)的运行状态至关重要。本文报道了一种新颖的光纤陀螺仪(FOG)监测系统,用于连续监测CFRD的面板变形,该系统由永久性监测管道和传感车辆组成。监测管道由钢管和聚氯乙烯聚合物连接器组成,埋入在CFRD混凝土面板下方的破碎型侧壁的缝隙中,形成永久的监测通道。传感车辆配备了高精度FOG传感器。设计了一个低通滤波器,以消除监测过程中传感车辆角速度的振动噪声。在世界最高CFRD的Shuibuya大坝上进行了现场测试。 FOG监控系统的测量与传统仪器测量非常吻合,可作为系统的验证。 FOG监控系统具有可重复性极佳,使用寿命长,分布式监控和自动测量的优点。

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