摘要
光纤光栅传感器具有抗电磁干扰、无需供电、耐腐蚀、灵敏度高等特点,已广泛应用于土木水利工程领域。引水隧洞作为水利行业一种常见的建筑结构,受隧洞本身结构、工程及环境等特点影响,其部分特殊洞段结构存在安全隐患,需对其进行长期有效的稳定性监测。以甘肃省引洮供水一期工程7号隧洞为例,介绍光纤传感技术在引水隧洞结构安全监测中的应用情况,传感器分别采用不同的封装结构对隧洞的应力、位移、温度和沉降状况进行了有效监测,并通过实测数据验证了光纤传感技术在隧洞中应用的可靠性。
Fiber Bragg grating(FBG)sensors have the characteristics of anti-electromagnetic interference,no power supply,corrosion resistance and high sensitivity.As a common construction structure in water conservancy industry,diversion tunnel has some hidden safety problems due to its structure,engineering and environment.Therefore,it is necessary to carry out long-term effective stability monitoring.Based on the water supply engineering of 7#tunnel in Gansu province as an example,the optical fiber sensing technology was introduced in the safety monitoring of the diversion tunnel structure.FBG sensors were used in different encapsulation structure to monitor the stress,the displacement,the temperature,and the settlement of the tunnel effectively.The measured data also verified the reliability of the application of optical fiber sensing technology in tunnels.
作者
欧阳宏
夏天
OUYANG Hong;XIA Tian(Gansu Design Institute of Water Conservancy and Hydro-electric Power,Lanzhou 730030,China;Yintao Engineering Construction Administration Bureau of Gansu Province,Lanzhou 730000,China)
出处
《中国农村水利水电》
北大核心
2022年第2期206-209,共4页
China Rural Water and Hydropower
基金
国家重点研发计划重点专项(2017YFB0405505)。
关键词
光纤传感
光纤光栅
引水隧洞
结构监测
fiber sensing
Fiber Bragg grating
diversion tunnel
structural monitoring
