Health-monitoring system of distributed sensing fiber tunnel

A technology of health monitoring system and sensing optical fiber, which is applied in the direction of measuring device, adopting optical device, and measuring the change force of optical properties of the material when it is stressed, can solve the problem of short time

Inactive Publication Date: 2010-05-26
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, it has been used in civil engineering for a relatively short time, the optimal design of the optical fiber monitoring network, the fast and non-destructive laying of distributed sensing optica...

Method used

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  • Health-monitoring system of distributed sensing fiber tunnel
  • Health-monitoring system of distributed sensing fiber tunnel
  • Health-monitoring system of distributed sensing fiber tunnel

Examples

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Embodiment Construction

[0032] The distributed sensing optical fiber tunnel health monitoring system of the present invention includes sensing optical fibers arranged in the tunnel and a processing system for collecting and processing sensing optical fiber data.

[0033] Treatment systems include:

[0034] a) The data acquisition system has the function of real-time acquisition of strain and temperature;

[0035] b) BOTDA fiber analyzer (DITEST STA-R type BOTDA of Omnisens Company), which is used to emit laser signals, acquire optical signals and obtain structural strain and temperature information.

[0036] c) Data processing and health diagnosis system for real-time analysis and storage of strain data and diagnosis of tunnel health;

[0037] According to the geological survey report, the length of the V-level surrounding rock of the tunnel in this embodiment is about 150m. In order to realize the comprehensive monitoring of the overall deformation of the tunnel, the longitudinal sensing fiber and t...

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Abstract

The invention discloses a health-monitoring system of a distributed sensing fiber tunnel, comprising sensing fibers arranged in a tunnel and a processing system for collecting and processing the data of the sensing fibers which are distributed in the secondary lining concrete of the tunnel. The invention reasonably designs the health-monitoring detection network of the fibers, utilizes a fiber air-blowing technology and a tunnel vacuum aided grouting technology to embed the distributed sensing fibers in the secondary lining concrete and paste the distributed sensing fibers on the surface of the tunnel structure in a mode of reserving pre-buried grooves. The invention acquires an initial stress field by embedding sensing elements in the construction period and realizes the online, dynamic and real-time health monitoring of the tunnel structure.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a distributed sensing optical fiber health monitoring system. Background technique [0002] The tunnel structure is affected by complex surrounding rock and geological and hydrological conditions, and the safety of its structure has always been a very important issue in project construction, operation and maintenance. Nowadays, there is a consensus in the engineering circles at home and abroad that any major project has the risk of accidents or even accidents. So how to find the problem as early as possible before the accident and take necessary measures to reduce the occurrence of the accident and reduce the loss has become the primary problem that the engineering community needs to consider and solve. The purpose of highway tunnel health monitoring is to detect the damage and degradation of the tunnel and evaluate its safety status. It can effectively predict the performance c...

Claims

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Application Information

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IPC IPC(8): G01L1/24G01B11/16
Inventor 金伟良何勇毛江鸿
Owner ZHEJIANG UNIV
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