基于FBG的有压引水隧洞安全监测技术研究

发布时间：2018-03-21 00:41

本文选题：FBG传感器　切入点：安全监测　出处：《南京理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：有压引水隧洞,因其工程的复杂性及重要性,迫切需要包含施工期和运营期的全生命周期安全监测。但是,受限于有压引水隧洞的长线结构物特征,传统监测仪器很难满足数百公里长线监测要求。而近年来出现的FBG传感器,已经在隧道、桥梁、大坝等诸多领域得到成功应用,本研究试图将FBG技术应用在有压引水隧洞安全监测中,以保障隧洞在施工期与运营期的安全。本文主要开展以下研究内容：(1)对国内三家大型光纤光栅传感器供货商的传感器进行抽样率定,将率定结果与水工行业相关规范与标准进行对比,指出目前FBG传感器工艺的不足,并提出FBG传感器在有压引水隧洞安全监测现场率定的建议标准。(2)结合某有压引水隧洞工程,采用ABAQUS有限元分析软件对有压引水隧洞进行数值模拟分析,模拟隧洞施工期与运营期的应力状态,找出有压引水隧洞安全监测断面的重点区域,作为传感器布设方案的依据。(3)研究了有压引水隧洞内各型FBG传感器的布设方案以及尾缆保护措施,并结合实际工程以成熟的J2EE技术为安全监测系统的技术架构,构建了有压引水隧洞安全监测系统。(4)根据监测数据的采集、处理与分析,研究有压引水隧洞施工期的应力状态和长期使用的安全性,构建以现场巡视检查、时空分布为评判依据的安全评价体系,基于前人对隧道安全评价的研究,提出适用于课题的安全评价算法,并与前者的安全评价作对比。
[Abstract]:Because of the complexity and importance of the pressure diversion tunnel, it is urgent to include the whole life cycle safety monitoring during the construction and operation period. However, it is limited by the characteristics of the long line structure of the pressure diversion tunnel. Traditional monitoring instruments are difficult to meet the requirements of hundreds of kilometers of long line monitoring. However, in recent years, FBG sensors have been successfully applied in many fields, such as tunnels, bridges, dams, etc. This study attempts to apply FBG technology to the safety monitoring of pressurized diversion tunnels. In order to ensure the safety of the tunnel during the construction and operation period, the following research contents are mainly carried out in this paper: the sampling rate of the sensors of three large fiber grating sensor suppliers in China is determined. By comparing the results of rate determination with the relevant specifications and standards of hydraulic engineering industry, this paper points out the shortcomings of the current FBG sensor technology, and puts forward the suggested standard of FBG sensor for safety monitoring of pressurized diversion tunnel combined with a certain pressure diversion tunnel project. The finite element analysis software ABAQUS is used to simulate the stress state of the pressurized diversion tunnel during construction and operation, and to find out the key area of the safety monitoring section of the pressure diversion tunnel. As the basis of sensor layout scheme, the layout scheme of various types of FBG sensors and the protection measures of the tail cable in the pressurized diversion tunnel are studied, and the technical framework of the security monitoring system based on the mature J2EE technology is combined with the actual project. According to the collection, treatment and analysis of monitoring data, the stress state and long-term safety of pressure diversion tunnel during construction are studied, and the site inspection is constructed. Based on the previous research on tunnel safety evaluation, a safety evaluation algorithm suitable for the project is put forward and compared with that of the former.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TV554

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