Tunnel surrounding rock block collapse monitoring method and system based on natural vibration frequency

A technology of natural vibration frequency and monitoring system, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of inability to effectively identify or accurately identify the precursors of the collapse of surrounding rock blocks, time-consuming and labor-intensive costs, etc. Avoid collapse disasters, achieve safe construction, save time and construction costs

Active Publication Date: 2021-11-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the correlation and combined analysis of various physical information, the reliability of the identification of the precursors of the collapse of the surrounding rock blocks can be improved, and the problem that traditional monitoring methods cannot effectively or accurately identify the precursors of the collapse of the surrounding rock blocks can be solved.
[0005] The "point-domain" monitoring in the prior art is a monitoring mode for the collapse disaster of the entire block, and different simple monitoring modes are proposed for key blocks and collapse areas respectively. In the "point-domain" monitoring method, Only wireless sensor monitoring is used, which is time-consuming, laborious and costly

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  • Tunnel surrounding rock block collapse monitoring method and system based on natural vibration frequency

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Embodiment 1

[0038] This embodiment discloses a tunnel surrounding rock block collapse monitoring system based on the natural vibration frequency, including a tunnel laser vibration measurement system, a wireless vibration monitoring system and a block collapse disaster prediction system. In the tunnel surrounding rock 3, for tunnel excavation For the exposed dangerous block 1, the natural vibration frequency of the dangerous block is collected by the laser vibration measurement system, and the stable state of the dangerous block is quickly judged, which provides a scientific basis for taking corresponding support measures. Body 2, the natural vibration frequency of the dangerous block is monitored in real time through the wireless vibration monitoring system, and the monitoring data is transmitted to the block collapse disaster prediction system in real time. Collapse monitoring and early warning.

[0039] Predict the collapse risk of the surrounding rock block of the tunnel, specifically...

Embodiment 2

[0056] The purpose of this embodiment is to provide the above-mentioned method for monitoring the collapse of tunnel surrounding rock blocks based on natural vibration frequency, which includes the following steps:

[0057] A. Identify the dangerous surrounding rock blocks exposed in the excavated section according to the preliminary survey and drilling data of the tunnel, the advanced geological forecast data and the face construction data.

[0058] B. For the identified dangerous surrounding rock blocks in the tunnel, spray reflective paint on the blocks, and then set up the host of the laser vibrometer in a place with less vibration and a wide field of vision, and measure the reflective paint through the host of the laser vibrometer data, and then analyze the stable state of dangerous blocks based on data analysis software. For unstable and low-risk blocks, mechanical exclusion can be adopted. For unstable and high-risk blocks, the The dangerous blocks are supported by mean...

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Abstract

The invention provides a tunnel surrounding rock block collapse monitoring system based on natural vibration frequency. The tunnel surrounding rock block collapse monitoring system comprises a tunnel laser vibration measurement system, a wireless vibration monitoring system and a block collapse disaster prediction system, the laser vibration measurement system is used for collecting the natural vibration frequency of a dangerous block body for the dangerous block body disclosed by tunnel excavation, and is used for quickly judging the stable state of the dangerous block body; the wireless vibration monitoring system is used for monitoring the natural vibration frequency of the dangerous block body in real time aiming at the supported dangerous block body, and transmitting the monitoring data to the block body collapse disaster prediction system in real time; and the block collapse disaster prediction system is used for predicting the collapse risk of tunnel surrounding rock blocks.

Description

technical field [0001] The disclosure belongs to the technical field of geotechnical engineering disaster monitoring and early warning, and in particular relates to a method and system for monitoring the collapse of tunnel surrounding rock blocks based on natural vibration frequencies. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The tunnel surrounding rock block collapse disaster is the isolated or semi-isolated structure formed by the combination of the existing structural plane in the rock mass and the free surface formed by the excavation, and the rock mass that deviates from the original position due to the breaking of the original equilibrium state and causes engineering accidents. Local instability accident. For a long time, the collapse of surrounding rock blocks has seriously threatened the tunnel construction and personnel s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01H17/00G01D21/02
CPCG01H9/00G01H17/00G01D21/02
Inventor 刘洪亮杨光宇李术才李利平范宏运成帅李尚安冀笑瑀刘洋
Owner SHANDONG UNIV
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