基于植入式分布式光纤传感技术的引黄涵闸混凝土温度监测方法及其应用  

Method and application of concrete temperature monitoring for the Yellow River diversion sluice gates based on embedded distributed fiber optic sensing technology

作　　者：渠继凯 綦跃强 渠帅 QU Jikai;QI Yueqiang;QU Shuai(Shandong Yellow River Water Conservancy Bureau Engineering Construction Center,Jinan 250011,China;Shandong Yellow River Shuncheng Water Conservancy and Hydropower Engineering Co.,Ltd.,Jinan 250032,China;Laser Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250104,China)

机构地区：[1]山东黄河河务局工程建设中心,山东济南250011 [2]山东黄河顺成水利水电工程有限公司,山东济南250032 [3]齐鲁工业大学(山东省科学院)山东省科学院激光研究所,山东济南250104

出　　处：《山东科学》2024年第5期54-61,共8页Shandong Science

基　　金：齐鲁工业大学科教产融合试点工程基础研究类项目(2023PX064);山东省自然科学基金(ZR2021LLZ014)。

摘　　要：准确获取混凝土浇筑及固化过程中的温度特征参量变化对于了解及掌握黄河流域引黄涵闸工程建设中混凝土开裂产生原因具有重要意义。目前黄河流域引黄涵闸建设工程中主要采用热成像方式测量其表面温度,难以实时获取混凝土的整体温度特征。采用植入式分布式光纤传感技术在对引黄涵闸工程山东段混凝土温度进行监测,在混凝土浇筑前,将传感光缆预先布设于结构钢筋两侧,从而实时有效地监测混凝土浇筑和固化过程中的内部温度特征。实验结果表明,采用植入式分布式光纤传感技术,可以实时监测混凝土各个点位的温度变化及固化过程中的温度异常点,同时,该方案可以有效分析混凝土固化过程中温度特征及整体变化情况。依托分布式光纤传感技术实现引黄涵闸混凝土温度监测,对黄河流域同类工程建设具有重要的借鉴意义。Accurate measurement of temperature variations during the pouring and curing of concrete is of great importance for investigating concrete cracking during the construction of the Yellow River Diversion Project in the Yellow River Basin.Notably,the current construction projects involved in the Yellow River Diversion Project in the Yellow River Basin primarily use thermal imaging methods for surface temperature measurement,making it difficult to obtain real-time overall temperature characteristics of concrete.Therefore,to improve the ecological system of the Yellow River Basin and ensure high-quality development in the region,this research proposes a concrete-temperature monitoring method for the Yellow River Diversion Project based on implantable distributed fiber optic sensing;this method has been successfully used in the Yellow River Diversion Project in Shandong Province.Before concrete is poured,the sensing fiber opthic cable is prelaid on both sides of the involved structural-steel bars,enabling real-time and effective monitoring of the internal temperatures during the pouring and curing of concrete.This method is of great value for ensuring real-time analysis of the temperature of concrete throughout its lifecycle.Experimental results show that the use of implantable distributed fiber optic sensing allows real-time monitoring of temperature changes at various points in concrete and temperature anomalies during curing.Moreover,this method can be used to effectively analyze the overall temperature variation during curing.Using implantable distributed fiber optic sensing to monitor the concrete temperature for the Yellow River Diversion Project is of considerable reference value for similar engineering projects in the Yellow River Basin.

关 键 词：引黄涵闸工程 分布式光纤传感技术 混凝土 温度监测 

分 类 号：TN247[电子电信—物理电子学]