A tunnel lining vault void monitoring device and monitoring method

Abstract

The invention discloses a tunnel lining vault void monitoring device and a monitoring method, belonging to the technical field of tunnel engineering construction. The tunnel lining vault void monitoring device includes electrical connection monitoring main equipment, signal transmission equipment, and signal receiving and processing equipment, wherein the main monitoring equipment includes a hollow rock shell with a built-in attitude sensor. It has the same shape and structure, and can be placed in the concrete slurry and flow with the concrete slurry during the lining pouring process. During the pouring process, by observing and monitoring the movement trajectory of the main equipment in the lining structure, the flow direction and final arrival position of the grout in the concrete pouring can be accurately restored, which overcomes the blindness of the existing judgment based on empirical methods; In concrete, real-time monitoring can be carried out on the concrete before it reaches its age, and local voids can be found in time, so that grout can be replenished in time, creating conditions for the reinforcement of the lining structure.

Description

technical field [0001] The invention relates to a monitoring device and a monitoring method for the hollowing out of a tunnel lining vault, belonging to the technical field of tunnel engineering construction. Background technique [0002] For a long time, tunnel construction has been plagued by the problem of lining voids. There are frequent reports of engineering disasters caused by tunnel lining voids. The tunnel engineering problems caused by lining void are as follows: (1) aggravating the corrosion of the lining and internal steel bars, reducing the supporting capacity; (2) loosening and falling off of the lining, endangering driving safety; (3) causing freezing damage to the tunnel in severe cold areas, etc. The monitoring and prevention of lining voids are directly related to the operational safety and service life of the tunnel. [0003] The main reasons for lining voids are: (1) poor concrete fluidity or insufficient pumping pressure, which makes the concrete unabl...

AI Technical Summary

Problems solved by technology

However, the monitoring accuracy of ground radar is greatly disturbed by the environment, and it is easily affected by the density of steel mesh and the fit degree of radar antenna.

In addition, ground radar can only be carried out after the concrete has reached its age. Even if holes are detected, it is difficult to reinforce the lining structure, and the integrity of the lining structure is damaged.

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