Tunnel structure monitoring system and tunnel structure monitoring method based on distributed long-gauge fiber bragg grating

A fiber grating and tunnel structure technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as short time, and achieve the effects of disaster prevention, simple layout, and low monitoring cost
CN104374433AInactive Publication Date: 2015-02-25SOUTHEAST UNIV +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2015-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a tunnel structure monitoring system and a tunnel structure monitoring method based on a distributed long-gauge fiber bragg grating. The system comprises distributed long-gauge fiber bragg grating sensors which are comprehensively distributed in a monitored range along the axial direction and the cross section of a tunnel; and longitudinal sedimentation of the tunnel and change conditions of various ring joints of the shield tunnel are monitored. The method comprises the following steps of arranging the distributed long-gauge fiber bragg grating sensors; and acquiring, transmitting and processing data. By the tunnel structure monitoring system and the tunnel structure monitoring method based on the distributed long-gauge fiber bragg grating, full-life monitoring on a tunnel structure in a construction period and a running period can be carried out, and longitudinal sedimentation, convergence deformation, joint deformation, duct piece internal force, strain and the like of the tunnel structure are dynamically monitored in real time.
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Description

technical field

[0001] The invention relates to a tunnel monitoring system, in particular to a method for monitoring the health of a tunnel lining structure by using a distributed long gauge optical fiber grating sensor, and belongs to the technical field of civil engineering monitoring. Background technique

[0002] Compared with other projects, tunnel engineering has the characteristics of concealment, complexity, and uncertainty. The tunnel structure and its force deformation process are more complicated, which increases the difficulty and risk in the construction process. At the same time, due to the influence of geological conditions, external environment, train vibration and many other factors, the health of the tunnel structure is gradually deteriorating with the increase of operation time. Therefore, strengthening the daily monitoring measures of the tunnel structure, early detection of various damage characteristics of the tunnel during the daily operation period, a...

Claims

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