基于光纤陀螺的堆石坝内部沉降分布式监测技术研究  

Study on distributed monitoring technology for internal settlement of rockfill dam using fiber optic gyroscope

作　　者：廖铖 蔡德所[2] 李苗 林金城 Liao Cheng;Cai Desuo;Li Miao;Lin Jincheng(Jiangxi Academy of Water Science and Engineering,Nanchang,Nanchang 330029,China;China Three Gorges University,Yichang 443002,China;Jiangxi Water Resources Insti-tute,Nanchang 330013,China;Power China Guiyang Engineering Corporation Limited,Guiyang 550081,China)

机构地区：[1]江西省水利科学院,江西南昌330029 [2]三峡大学,湖北宜昌443002 [3]江西水利职业学院,江西南昌330013 [4]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《土木工程学报》2024年第2期77-86,共10页China Civil Engineering Journal

基　　金：江西省水利厅科技项目(202123YBKT26)。

摘　　要：针对传统堆石坝内部沉降监测技术已难于满足超高堆石坝内部沉降监测需求。文章开发了基于光纤陀螺仪(FOG)的堆石坝内部沉降分布式监测系统,该系统主要由监测管道、监测小车和牵引装置组成。推导FOG监测系统测量坝体内部沉降的原理,考虑监测小车不匀速问题,建立监测小车运行速度函数关系,引进经验模态(EMD)-小波混合降噪方法滤除监测小车运行过程中的振动噪声和FOG漂移误差。该监测系统成功应用于猴子岩面板堆石坝。现场监测结果表明,FOG2次独立测量结果的相关系数为0.986,说明FOG监测系统工作性能稳定,与水管式沉降仪测量结果基本一致,验证了该系统的可行性和准确性。Due to the fact that the traditional internal settlement monitoring technology of rockfill dam is difficult to meet the internal settlement monitoring requirements of very high rockfill dams,an advanced monitoring system using fiber-optic gyroscope(FOG)for continuously measuring the internal settlement of rockfill dams was developed.This system mainly consists of a pipeline,an intelligent vehicle,and a power unit.The principle of the mo-nitoring system measuring settlement was derived.Furthermore,a function relationship about ve-locity considering the sensing vehicle non-uniform velocity is established.The empirical mode(EMD)-wavelet hybrid noise reduction method was employed to eliminate the vibration noise and FOG drift error of the sensing vehicle.This system was applied to measuring the in-situ in-ternal settlement of the Houziyan rockfill dam,the results of two independent measurements show that the correlation coefficient is 0.986,indicating that the performance of the FOG moni-toring system is stable.Meanwhile,the feasibility and accuracy of the system were verified by comparing its results with the measured results of the hydraulic overflow settlement gage.

关 键 词：堆石坝 内部沉降 光纤陀螺 分布式监测 经验模态-小波 

分 类 号：TV698[水利工程—水利水电工程]