Device for reducing spring rate of backfilled and sprayed concrete

Abstract

The invention relates to a device for reducing the spring rate of backfilled and sprayed concrete. The device comprises a PVC endurant plate, three rails and six powerful electromagnets all arranged on a steel arch frame; the rails are connected with the powerful electromagnets; and the PVC endurant plate, the three rails and the six powerful electromagnets are cooperated to form a sealing cavity.According to the device, through additionally arranging the combined structure of the PVC endurant plate, the three rails and the six powerful electromagnets, and through the cooperative action of the PVC endurant plate, the three rails and the six powerful electromagnets, the sealing cavity is formed, so that during specific construction, a relatively closed environment is created for the ejected concrete mixture, ejecting rebound material is automatically collected in the sealing environment, and ejection forming is carried out on the concrete mixture in the sealing environment to effectively reduce the spring rate of the backfilled and sprayed concrete.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering equipment, in particular to a device for reducing the rebound rate of backfilled sprayed concrete. Background technique [0002] Tunnel engineering is a common engineering project in various infrastructure projects. Under adverse geological conditions, the combined support method of steel arch frame + steel mesh + anchor rod + sprayed concrete is a common support method. It is widely used in various tunnel projects. [0003] As a support technology for tunnel construction, sprayed concrete is one of the three major elements of the new Austrian method. It uses compressed air as the power to combine the concrete mixture mixed with accelerator and water into a slurry, and spray it onto the rock wall. The fine-grained concrete formed on the ground and quickly condensed has the functions of supporting the surrounding rock, filling and strengthening the surrounding rock, covering the surroun...

AI Technical Summary

Problems solved by technology

In the actual construction on site, when the compressed air sprays the mixture of concrete mixture and water to the surrounding rock at a certain distance and angle at a certain speed, part of the mixture rebounds when it encounters the surrounding rock, and the concrete mixture is scattered in the tunnel. , not only causes waste, but also requires more manpower to clean up, which aggravates the increase in the construction cost of sprayed concrete

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