A monitoring system and monitoring method for real-time measurement of tunnel vault settlement

Abstract

The invention discloses a monitoring system and monitoring method for real-time measurement of tunnel vault settlement, comprising: a laser range finder, a movable target window and a processing system; the laser range finder is horizontally arranged on the inner wall of the stable surrounding rock of the tunnel, and the movable target The window can be vertically lifted and lowered at a constant speed and set on the inner wall of the unstable surrounding rock of the tunnel. The movable target window can block the laser line of the laser rangefinder when it is vertically lifted; Calculate the target window elevation of the movable target window according to the time difference between the last two passes of the laser rangefinder; the processing system is connected with the laser rangefinder to receive the target window elevation of the movable target window, and measure the tunnel arch in real time according to the target window elevation top settlement.

Description

technical field [0001] The invention belongs to the technical field of laser measurement, and relates to a monitoring system and monitoring method for real-time measurement of tunnel vault settlement, in particular to a monitoring system and monitoring method for real-time measurement of tunnel vault settlement based on a laser range finder capable of backsight correction . Background technique [0002] Tunnel construction technology has been greatly developed with the improvement of construction machines, but deformation caused by excavation is still inevitable. During the tunnel excavation process, the safety of its own structure and the temperature of the environment along the line are very important, and long-term deformation measurement is very necessary. The tunnel vault settlement monitoring is an important content of underground tunnel deformation monitoring. [0003] There are two types of existing arch settlement monitoring methods: contact measurement and non-co...

AI Technical Summary

Problems solved by technology

[0004] When contact measurement is used, when measuring the points of the side wall and on the super large working surface, it is inconvenient to operate because of the difficulty of vertical level or hanging steel ruler; the light in the tunnel is weak, and it is difficult to perform operations such as alignment; The monitoring can only measure one section at a time, and the efficiency is relatively low; during the measurement, the personnel or transportation lists in the tunnel are constantly entering and exiting, which will also bring inconvenience to the measurement

[0005] When non-contact measurement is used, the light in the tunnel is weak during measurement, and it is difficult to perform operations such as alignment; the entry and exit of trains or personnel brings inconvenience to the measurement, the efficiency is not high, and the hardware cost is relatively high

When the automatic deformation monitoring system is adopted, the hardware cost is very high

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