Subway tunnel deformation displacement early warning acquisition system and analysis method

A collection system and tunnel technology, applied in the direction of using optical devices, measuring devices, instruments, etc., to prevent the local and overall deformation, displacement and diffusion of the tunnel

Pending Publication Date: 2021-03-26
青岛益群地下城开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a lack of a comprehensive acquisition and analysis method for the subway tunnel environment to solve the problem of pipeline safety early warning is an important means to ensure the safe operation of the subway

Method used

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  • Subway tunnel deformation displacement early warning acquisition system and analysis method
  • Subway tunnel deformation displacement early warning acquisition system and analysis method

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Embodiment 1

[0032] Such as Figure 1 to Figure 2 As shown, the subway tunnel deformation and displacement early warning collection system of the present invention, the subway tunnel deformation and displacement early warning collection system includes a comprehensive safety early warning server 6 arranged on the ground 7, and is connected to the comprehensive safety early warning server by a collection demodulator The optical fiber 2 of 6, the optical fiber 2 is laid along the direction of the subway tunnel 1, and the optical fiber 2 is connected to the early warning acquisition module for detecting the deformation and displacement of the subway tunnel 1. The early warning acquisition module includes the following units: the optical fiber acoustic wave sensor 3 is laid in the subway tunnel by distributed wiring 1, the distributed optical fiber acoustic wave sensor 3 transmits the acoustic wave signal to the comprehensive safety early warning server 6; the grating strain sensor 4 includes a...

Embodiment 2

[0039] The analysis method of the subway tunnel deformation and displacement early warning acquisition system described in the present invention comprises the following steps:

[0040] Step 1: The integrated safety early warning server 6 controls the acquisition demodulator to emit light pulses into the optical fiber 2;

[0041] Step 2: The optical fiber acoustic wave sensor 3 detects the sound wave signal of the subway tunnel 1 to be warned, the grating strain sensor 4 detects the stress change information of the subway tunnel 1 to be warned, and the grating static level 5 detects the information of the inclination angle of the subway tunnel 1, three kinds of information Return to the integrated security early warning server 6 with backscattered signals;

[0042] Step 3: the integrated security warning server 6 makes the following judgments according to the scattered signal:

[0043] If the vibration intensity of the fiber optic acoustic wave sensor 3 exceeds the upper limit...

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PUM

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Abstract

The invention relates to a subway tunnel deformation displacement early warning acquisition system and an analysis method, and belongs to the technical field of tunnel safety early warning. The systemcomprises a comprehensive safety early warning server, a distributed optical fiber demodulation module, an optical fiber and early warning acquisition module and the like. The optical fiber is laid in the direction of a subway tunnel and connected with the early warning collection module for detecting deformation and displacement of the subway tunnel, and the early warning collection module comprises an optical fiber acoustic wave sensor, an optical fiber grating strain sensor and an optical fiber grating static leveling instrument. After the comprehensive safety early warning server receivesinformation of the optical fiber acoustic wave sensor, the grating strain sensor or the grating static force level gauge, the alarm is controlled to act through comprehensive analysis and judgment. Vibration, deformation and displacement automatic early warning is carried out on the subway tunnel operating within the construction influence range, damage caused by non-subway tunnel construction isprevented in time, and therefore targeted prevention measures can be taken to prevent local and overall deformation, displacement and diffusion of the tunnel. The system can be widely applied to tunnel safety early warning occasions.

Description

technical field [0001] The invention relates to a subway tunnel deformation and displacement early warning acquisition system and analysis method, belonging to the technical field of tunnel safety early warning. Background technique [0002] In cities where subways have been built or are under construction, more and more non-metro projects are being constructed near or above the subway line. There are construction procedures or factors such as drilling, piling, unloading and loading, pumping, precipitation or vibration in the project, which may have a certain impact on the tunnel structure, such as drilling through the tunnel, deformation, inclination, displacement, uplift or settlement, etc. There is still a lack of a comprehensive acquisition and analysis method for the subway tunnel environment to solve the problem of pipeline safety early warning, which is an important means to ensure the safe operation of the subway. Contents of the invention [0003] In view of the ...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01H9/00G01C9/00
CPCG01B11/18G01C9/00G01H9/004
Inventor 郭福成潘同斌邱丙水孙溥声孙宽堃孙正义张欣冉冯雨
Owner 青岛益群地下城开发有限公司
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