分布式光纤监测技术在基坑监测中的应用  

Application of distributed optical fiber monitoring technology in monitoring of excavation

作　　者：吉晓朋[1] 张志创 李克[3] 张驰 钱坤 JI Xiaopeng;ZHANG Zhichuang;LI Ke;ZHANG Chi;QIAN Kun(AVIC Institute of Geotechnical Engineering Co.,Ltd.,Beijing 100098,China;Henan Huasha Architectural Design Co.,Ltd.,Zhengzhou 450000,China;Department of Civil and Environmental Engineering,Shantou University,Shantou 515063,China;School of Architecture and Civil Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中航勘察设计研究院有限公司,北京100098 [2]河南华厦建筑设计有限公司,河南郑州450000 [3]汕头大学土木与环境工程系,广东汕头515063 [4]中原工学院建筑工程学院,河南郑州450007

出　　处：《中原工学院学报》2022年第6期49-53,共5页Journal of Zhongyuan University of Technology

摘　　要：以北京市某基坑工程为例,采用分布式光纤传感技术对基坑锚杆应变进行了监测,分析了监测过程中锚杆轴力分布及变化规律,反算了锚固体与土体之间的粘结强度。结果表明:通过分布式光纤应变监测计算的锚杆轴力与锚杆测力计实测的结果保持较高的一致性,分布式光纤监测技术应用于基坑锚杆轴力监测是可靠的。通过分布式光纤应变监测结果,可以反算锚固体与土体之间的粘结强度,为类似工程监测及设计提供参考。Taking a foundation pit project in Beijing as an example,this paper used the distributed optical fiber sensing technology is used to monitor the strain of the foundation pit anchor,analyzed the distribution and variation law of the axial force of the anchor during the monitoring process,and back-calculated the bond strength between the anchor and the soil.The results show that the axial force of anchor rod calculated by distributed optical fiber strain monitoring is consistent with the actual monitoring results of axial force meter,and the application of distributed optical fiber monitoring technology to the monitoring of axial force of anchor rod in foundation pit is reliable.Through the distributed optical fiber strain monitoring results,the bond strength between the anchor and the soil can be back-calculated,which provides a reference for the monitoring and design of similar projects.

关 键 词：锚杆 分布式光纤 基坑监测 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]