隧道结构健康监测系统与光纤传感技术

隧道安全关系到人类生命安全和社会经济活动,及时掌握隧道结构健康状态是确保隧道安全的重要前提。在详细分析结构健康监测的概念、系统组成和发展现状的基础上,结合隧道结构的具体特点,提出了隧道结构健康监测的定义,构建了一个集监测、诊断和状态评价为一体的隧道结构健康监测系统,重点介绍了光纤结构监测(SO-FO)、布拉格光纤光栅(FBG)和分布式光纤传感器(BOTDR)等3种光纤传感技术的基本原理、功能及其在隧道结构健康监测系统中的作用。有理由相信,以光纤传感技术为代表的新一代工程监测技术将为隧道结构健康监测系统的建立提供厚实的技术基础。

Tunnel Structural Health Monitoring System and Fiber Optic Sensing Technology

Tunnel security is a key problem that concerns the human′s life and property.Monitoring the state of tunnel structural health in time is the precondition of ensuring tunnel security.Therefore,the definition of Tunnel Structural Health Monitoring was presented in this paper,by combining the definition of Structural Health Monitoring(SHM) and characteristics of tunnel structures.According to the definition of Tunnel Structural Health Monitoring,a Tunnel Structural Health Monitoring System(TSHMS) was established with three functions of monitoring,diagnosis and state evaluation.The principle and application of three fiber optic sensors,especially their effect on the TSHMS,were also presented in details.We can believe that as the representative of new sensing technology in Tunnel Structural Health Monitoring,fiber optic sensing technology will provide a lasting technical foundation for building up the Tunnel Structural Health Monitoring System.