Peripheral displacement monitoring and measuring system during tunnel construction

Abstract

The invention discloses a peripheral displacement monitoring and measuring system during tunnel construction. According to the system, one end of a tunnel vault measuring point hook is provided with a thread head, a plastic sleeve can be put in a surrounding rock borehole during embedding, and the plastic sleeve is extruded by screwing the thread head, so that the plastic sleeve is fixed in the tunnel vault surrounding rock; one end of a side wall measuring point hook is fixed in the tunnel side wall surrounding rock, and the other end of the side wall measuring point hook is provided with a hook; a convergence meter measuring hook can be fed to the tunnel vault measuring point hook through a supporting telescopic rod with an electromagnetic plate, the ruler hanging process is finished, similarly the convergence meter measuring hook can be detached from the vault measuring point hook, and the ruler folding process is finished; a steel rope is tightened by employing a clockwork roller and is fixed through a positioning pin, the tension of the steel rope is controlled by adjusting an adjusting nut, and when the window reading of a tension sensor is a pre-tensioning value, the convergence value suspended between two measuring points can be read. The peripheral displacement monitoring and measuring system has the advantages of convenience in ruler hanging, accurate measurement, reliable data, backlight display and repeated utilization, the measured data can be automatically stored, and the side wall hook is prevented from being damaged.

Description

technical field [0001] The invention relates to a geotechnical engineering monitoring and measuring system, in particular to a peripheral displacement measuring system in on-site monitoring of stability of tunnels and underground engineering and mine roadways. Background technique [0002] According to the basic principles of the new Austrian method of tunnel construction, smooth blasting, anchor shotcrete support and monitoring and measurement are often called the three major elements of the new Austrian method of construction. Tunnel monitoring and measurement can dynamically monitor the force of surrounding rock and support system and the mechanical relationship between them during tunnel construction, and judge the stability of surrounding rock and tunnel by analyzing the results of monitoring measurement data stability and stress-strain state, and thus to ensure construction safety, guide the construction sequence, conduct construction management, provide design informa...

AI Technical Summary

Problems solved by technology

[0004] At present, the instruments and equipment used to test the displacement around the tunnel are mainly convergent gauges, but the current convergent gauges are prone to rust, cracking, bending, etc.

In addition, when the scale line on the inner guide rod of the convergent gauge coincides with the scale line on the sleeve, different operators will have different readings, and even the same operator will have different readings before and after, resulting in large measurement errors

In order to overcome the defects of difficulty in hanging ruler, large reading error, low measurement reliability and easy damage of the existing extensometer, the patent of the present invention is designed.

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