%0 Journal Article
%T 分布式光纤传感监测盾构隧道收敛变形研究<br>Study of shield tunnel convergence deformation motoring using distributed optical fiber sensing technology
%A 钟东
%A 唐永圣&lt
%A br&gt
%A ZONG Dong
%A TANG Yongsheng
%J 铁道科学与工程学报
%D 2016
%X 收敛变形是表征盾构隧道结构健康、安全的重要指标,利用现有技术对其实施大规模监测存在困难。为此,引入先进的分布式光纤传感技术,建立盾构隧道收敛变形的监测方法。首先,基于传感技术特点和隧道监测特征,提出长标距光纤传感器的封装结构,试验验证了其优良的应变传感性能。然后,建立应变反演收敛变形的理论方法。最后,通过室内足尺模型试验对提出的方法进行了验证。结果表明:文中提出的方法可准确评估盾构隧道的收敛变形,其精度满足工程管养的需求;同时还表明:管片接缝变化对收敛变形的影响大,在实际监测中应优先满足接缝处变形的监测。考虑到分布式光纤传感在传感距离、稳定性和耐久性等方面的优势,本方法具有广阔的应用前景。<br>Convergence deformation is a key indicator which can indicate the health and safety of shield tunnel. However, it is difficult to implement the monitoring especially in large-scale with the traditional methods. In this paper, a new method is proposed based on the distributed optical fiber sensing technology. By considering the features of the sensing technology and shield tunnel, a long-gauge sensor was proposed and verified with some experiments. The results show a good strain sensing performance. Then, the method of assessing convergence deformation from strain measurement is proposed. Lastly, the proposed method is verified with a full size specimen of shield tunnel. Based on the static experiment, the convergence deformation could be evaluated with a good accuracy satisfying the demands of tunnel management. At the same time, the seam change show a large influence on convergence deformation. Therefore, the seam monitoring should be arranged at first in actual project. Considering the additional advantage of the distributed sensing, such as sensing distance, stability and durability, the proposed system has broad application prospects
%K 盾构隧道
%K 收敛变形
%K 分布式光纤传感技术
%K 结构健康监测&lt
%K br&gt
%K shield tunnel
%K convergence deformation
%K distributed optical fiber sensing technology
%K structural health monitoring
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311838