Tunnel engineering monitoring measurement point protecting device and mounting method

Abstract

The invention relates to a tunnel engineering monitoring measurement point protecting device and a mounting method. The device comprises a protective cover, support nuts, fixing supports, a measurement point, a center shaft fixing nut and LED lights. Before embedding of the measurement point, the center shaft fixing nut sleeves a measurement point connection rod, and then the measurement point isput in a preserved drill hole and fixed in a tunnel vault or a side wall; after fixing, the measurement point is exposed, and a reflective plate is adhered to the measurement point; the protective cover is connected with the measurement point through the fixing supports and fixed to the side wall through the center shaft fixing nut. Due to annular encircling of the measurement point, the measurement point can be effectively protected from being damaged by blasting flyrock or tunnel construction machinery while measurement requirements of the measurement point can be well met. In addition, thetunnel engineering monitoring measurement point protecting device has advantages of simple structure, simplicity in operation and the like.

Description

Technical field [0001] The invention relates to the field of tunnel engineering monitoring and measurement, in particular to an anti-damage protection device and an installation method for monitoring and measurement monitoring points. Background technique [0002] The tunnel construction process often causes the redistribution of surrounding rock stress and the release of ground stress. Therefore, after the tunnel is excavated, the dome of the tunnel will settle and the radial convergent deformation will occur. Monitoring and measurement is one of the important links in the tunnel construction process. Through the analysis of the measurement data, it can be tested whether the initial support is safe and reasonable, can effectively evaluate the stability and stress and strain state of the surrounding rock support, and can be reasonably determined Construction time of secondary lining. Rely on effective construction monitoring and measurement, and thus to correct, modify the desi...

AI Technical Summary

Problems solved by technology

The gravel from the blasting on the face of the tunnel may hit the measuring point. Because large-scale machinery construction, slag removal trucks and forklifts will hit the measuring point, the measuring point hook will be deformed; (2) the traditional convergent measuring point hook, only Able to measure the convergence measuring point with the convergence meter

For large-section tunnels, although the accuracy of the extensometer detection is high, the settlement of the vault cannot be measured smoothly, and it needs to be operated on a platform truck, which is relatively inconvenient

However, the convergence auxiliary device of the total station has the function of convergence meter and is easy to operate, but in the dark and dusty tunnel environment, the visibility is low, resulting in low measurement accuracy

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