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: 2012-01-04
ZHEJIANG UNIV
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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 optical fibers, the judgment of the health status of the tunnel structure during operation, and the real-time collection and analysis of detection data still exist. Some technical problems that need to be resolved

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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

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Embodiment Construction

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

[0033] The processing system includes:

[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), used to emit laser signals, obtain optical signals and obtain structural strain and temperature information.

[0036] c) Data processing and health diagnosis system, used 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-class surrounding rock of the tunnel in this embodiment is about 150m. In order to realize the overall monitoring of the overall deformation of the tunnel, longitudinal sensing fibers and hoop sensing fibers are arranged inside th...

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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 rocks 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, the engineering circles at home and abroad have reached a consensus that any major project has the risk of accidents or even crashes. So how to find problems as early as possible before the accident and take necessary measures to reduce the occurrence of accidents and reduce losses has become the primary problem that the engineering community needs to consider and solve. The purpose of road tunnel health monitoring is to detect the damage and degradation of the tunnel and assess its safety status. It can effectively predict the performance changes of the tunn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24G01B11/16
Inventor 金伟良何勇毛江鸿
Owner ZHEJIANG UNIV
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