一种基于法布里-珀罗原理的测缝计在坝体监测中的应用  

Application of a Crack Gauge Based on Fabry-Perot Interference Principle in Dam Monitoring

作　　者：陈静 向芸芸 赵刚 马畅 王一燚 CHEN Jing;XIANG Yunyun;ZHAO Gang;MA Chang;WANG Yiyi(Xinjiang Fukang Pumped Storage Co.Ltd.,Fukang 831500,China)

机构地区：[1]新疆阜康抽水蓄能有限公司,新疆维吾尔自治区阜康市831500

出　　处：《水电与抽水蓄能》2023年第5期87-90,97,共5页Hydropower and Pumped Storage

摘　　要：在坝体结构监测中,为防止坝体由于应力和热膨胀等原因导致应力过大、破坏结构,在坝体内设置预留缝。本文使用全新的光纤法布里-珀罗干涉原理测缝计,该传感器具有直接测量、无零漂、精度高、自动化测量、抗电磁干扰和防雷击等优点。通过对某混凝土拱坝7号坝段405m高程横缝的水平错动、垂直错动和开合度进行实时观测,再结合监测数据,综合分析横缝宽度的变化过程,证实了坝体的横缝宽度在安全范围内。In the monitoring of the dam body structure,reserved cracks are set in the dam body to prevent the dam body from being overstressed and damaging structure due to stress and thermal expansion.In this paper,a brand-new crack gauge based on optical fiber Fabry-Perot interference is used to detect the crack width.The sensor has the advantages of direct measurement,no zero drift,high precision,automatic measurement,antielectromagnetic interference and lightening protection.Through the real-time observation of the horizontal displacement,vertical displacement,and opening and closing degree of the 405-meter transverse crack of the No.7 dam body,it is proved that the crack width is within the safe range.

关 键 词：横缝 测缝计 光纤 法布里-珀罗干涉 安全监测 

分 类 号：TV698.1[水利工程—水利水电工程]