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
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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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