A Distributed Tunnel Strengthening Steel Ring Failure Monitoring Device and Method

Abstract

The invention discloses a distributed tunnel reinforcement steel ring failure monitoring device and method, belonging to the field of distributed optical fiber sensing. The device includes a light source module, a sensing module and a reinforced steel ring failure diagnosis module; wherein, the reinforced steel ring failure detection module is based on the fact that the phase of the reflected light in the sensing fiber changes with the resonant frequency of the cavity between the tunnel wall and the steel ring The principle is to convert the resonance state of the cavity between the tunnel wall and the steel ring into the phase change information of the reflected light to collect the failure state signal of the steel ring with resonance information. The invention processes the collected resonance signal and compares the amplitude-frequency signal measured in real time with the standard signal when it does not fail to determine whether the steel ring fails. The invention realizes all-weather, real-time and online monitoring of the failure state of the reinforced steel ring through distributed optical fiber vibration sensing, and solves the problem that the state of the reinforced steel ring cannot be monitored in real time in the prior art.

Description

technical field [0001] The invention belongs to the field of distributed optical fiber sensing, and more specifically relates to a failure monitoring device and method for a tunnel reinforcement steel ring. Background technique [0002] Tunnels are buildings that lay railways or roads for the passage of motor vehicles, and are important connection hubs for world traffic and transportation. With the development and aging of the world's tunnel infrastructure, the monitoring requirements for the safe and reliable operation of tunnels are also increasing. [0003] At present, most of the tunnel repair methods are to install reinforcement steel rings at the cracks or water seepage of the tunnel. For example, the Chinese patent application CN108386213A proposes the use of variable thickness steel rings, and determines the appropriate thickness of the steel rings according to the force characteristics of the tunnel segments to improve the reinforcement effect. China Patent CN20397...

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Problems solved by technology

[0005] In view of the defects of the prior art, the purpose of the present invention is to provide a distributed tunnel reinforcement steel ring failure monitoring device and method, aiming to solve the problem that the failure state of the reinforcement steel ring cannot be monitored in real time in the prior art

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