基于分布式光纤传感器的地下原水管道(廊)沉降监测研究  

Research on Settlement Monitoring Method of Underground Pipe Gallery Segment Based on Distributed Optical Fiber Sensor

作　　者：王蕾 徐云涛 毛哲凯 WANG Lei;XU Yuntao;MAO Zhekai(Hangzhou Water Digital Technology Co.,Ltd.,Hangzhou Zhejiang 310013,China)

机构地区：[1]杭州水务数智科技股份有限公司,浙江杭州310013

出　　处：《传感技术学报》2023年第5期833-838,共6页Chinese Journal of Sensors and Actuators

摘　　要：地下管廊、原水管道沿途地质情况复杂,地基承载力低、承载后变形量大,易发生不均匀沉降事件,致使敷设在其上的供水管道遭受破坏。为减轻巡查工作,节约沉降测量成本,研究基于分布式光纤传感的管道监测系统,将传感光纤铺设在管片上,对管廊进行实时监测。基于应变-沉降机理模型,对监测系统进行了实验验证,根据实验数据得到应变-沉降曲线的平均绝对误差约为1.23 mm。研究结果表明,该系统对于管道(廊)不均匀沉降事件具有监测距离长、响应及时和误报率低等特点。The geological conditions along the underground pipe gallery are complex.It is easy for uneven settlement event to occur because of the low bearing capacity and large deformation after bearing of the foundation,resulting in the damage of the water supply pipeline laid on it.In order to reduce the patrol work and save the cost of settlement measurement,a pipeline monitoring system based on distributed optical fiber sensing is studied,the sensing optical fiber is laid on the segment to monitor the pipe gallery in real time.Based on the strain settlement mechanism model,an experiment is conducted on the monitoring system.The average absolute error of the strain-settlement curve calculated from the experimental data is about 1.23 mm.The experimental results show that the system has the characteristics of long monitoring distance,timely response and low false alarm rate for uneven settlement of pipe rack.

关 键 词：光纤传感技术 智慧管廊 沉降模型 应变监测 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TU990.3[自动化与计算机技术—控制科学与工程]