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

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...

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

Images