摘要
为解决城市轨道交通盾构隧道施工期及运营期长距离沉降监测的难题,基于布里渊(BOFDA)技术提出了一种长距离分布式沉降监测方法。建立了相应的应变–位移算法,并通过室内试验进行验证。将该方法应用至南京地铁2号线工程中,实现了1 km长度上的分布式沉降变形监测。结合人工水准测量数据,对光纤监测结果进行验证,研究结果表明:监测段隧道经过注浆修复后,达到了较为显著的稳固效果,3个月时间内整体变形量在±1 mm以内,变形规律与修复前基本一致。所提出的分布式光纤沉降监测技术可以实现隧道长距离、精准沉降监测。
In order to solve the problem of long–distance settlement monitoring of shield tunnel in urban rail transit during construction and operation,based on the BOFDA technology,a method of long-distance distributed settlement monitoring was proposed in this paper,and the corresponding strain displacement algorithm is established.The method was applied to the construction of Nanjing metro line 2,and the distributed settlement monitoring of 1 km length was realized.Combined with the artificial leveling data,the results of optical fiber monitoring are verified.The monitoring results show that the tunnel in the monitoring section has achieved a significant stable effect after grouting repair.The overall deformation within three months is within±1 mm,and the deformation law is basically the same as that before repair.The distributed optical fiber settlement monitoring technology proposed in this paper can realize long-distance and accurate settlement monitoring of tunnel.
作者
殷瑞忠
岳荣花
徐东风
祝运
贾立翔
王宇
YIN Rui-zhong;YUE Rong-hua;XU Dong-feng;ZHU Yun;JIA Li-xiang;WANG Yu(Nanjing Metro Operation Co.,Ltd.,211121,Nanjing,China;Suzhou Nanzee Sensing Technology Co.,Ltd.,215123,Suzhou,Jiangsu,China)
出处
《建筑技术》
2023年第21期2613-2616,共4页
Architecture Technology
关键词
轨道交通
盾构隧道
分布式光纤
沉降监测
rail transit
shield tunnel
distributed optical fiber
settlement monitoring
