基于分布式光纤测温的拱坝施工期温度突变识别  

Identification of abnormal temperature data of arch dam during construction based on distributed optical fiber temperature measuring

作　　者：秦华康[1] 赵春菊[1,2] 周宜红[1,2] QIN Huakang ZHAO Chunju ZHOU Yihong(College of Hydraulic ＆ Environmental Engineering, China Three Gorges University, Yichang 443002, China Hubei Key Laboratory of Construction and Management in Hydropower Engineering, China Three Gorges University, Yichang 443002, China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡大学湖北省水电工程施工与管理重点实验室,湖北宜昌443002

出　　处：《人民长江》2017年第9期61-64,共4页Yangtze River

基　　金：国家自然科学基金面上项目(51479103)

摘　　要：针对溪洛渡特高拱坝施工期混凝土光纤测温出现的温度突变情况,结合光纤测温数据特征,采用循环探测检验法对温度突变值进行识别,并在建立的施工期混凝土温度统计模型基础上,通过回归分析对实测通水温度、环境气温等各温度分量引起的温度变化量进行定量分析。该识别方法可在混凝土温度发生突变时准确定量解析异常成因,以便修正实测温度数据。同时,基于光纤测温数据构建了坝体温度场,可更直观反映坝体温度场变化,为大坝温度场状态判断提供了依据。Aiming at the abnormal temperature data measured by optical fiber during construction period of Xiluodu high arch dam, we use cyclic detection test to identify the abnormal data in combination with the characteristics of measured data. A statis- tical model of concrete temperature is established, and the temperature variation caused by various temperature components, i. e. , the water temperature, the ambient temperature etc. , are analyzed quantitatively by regression analysis. The genesis of ab- normal data can be analyzed accurately and quantitatively by using this method when the concrete temperature changes abruptly, so the temperature data could be corrected. Furthermore, the temperature field of the dam is constructed based on the measured data, which provides the basis for judging the state of dam＇s temperature field.

关 键 词：光纤测温 温度统计模型 温度分量 循环探测检验法 溪洛渡高拱坝 

分 类 号：TV431[水利工程—水工结构工程]