Method and device for solidifying water-filling cracking surrounding rocks of tunnel by adopting high-pressure air water-dispelling grouting

Abstract

The invention particularly relates to a method and a device for solidifying water-filling cracking surrounding rocks of a tunnel by adopting high-pressure air water-dispelling grouting, solving the problems of high cost and complex process during the solidification of the water-filling cracking surrounding rocks of the tunnel in the prior art. The method adopts the following processes: a. drilling horizontal geology after ascertaining the range and the water filling condition of the water-filling cracking surrounding rocks, and then inserting a pressure-withstand pipe and sealing the periphery of the pressure-withstand pipe; b. sealing an excavation working surface to form a pump stop wall; c. guiding high-pressure air into the pressure-withstand pipe to replace and drain water filled in clearances among the cranking surrounding rocks; and d. after the pressure of the air is kept balanced, guiding cement slurry into the pressure-withstand pipe to fill the cracking surrounding rocks with the water filled in the clearance being replaced by the air. In the invention, by pressing the high-pressure air into the water-filling cracking surrounding rocks, pressing and delivering sealing material which has light weight and expanses when meeting water, quickly condensing the slurry to drain water by pressurizing, and sealing a clearance water supplement passage of the surrounding rocks,the original water-filling cracking belt grouting is changed into the water-free cracking belt grouting, thereby realizing the comprehensive effects of improving the process, simplifying the construction, improving the work efficiency and reducing the cost.

Description

technical field [0001] The invention relates to a reinforcement method and a device for water-filled and broken surrounding rock of a tunnel, in particular to a method and a device for reinforcing the water-filled and broken surrounding rock of a tunnel by high-pressure air flooding and grouting. Background technique [0002] In the process of tunnel construction, the surrounding rock is often broken, which poses certain safety hazards to the construction and future operation, and reinforcement must be carried out. The commonly used method is pressure grouting consolidation. Generally, according to the scope of the broken surrounding rock, the degree of looseness and other factors, high-pressure injection of ordinary cement slurry, ultra-fine cement slurry, HSC slurry, TGRM slurry, etc. The surrounding rock is consolidated into a whole to improve the self-stabilizing ability of the surrounding rock. After grouting, the surrounding rock has a certain strength before excavatio...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of high cost and complex process of adopting special grout to reinforce existing tunnels with water-filled and broken surrounding rocks, the present invention provides a high-pressure air-driven water-driven grouting reinforcement method for water-filled and broken surrounding rocks and device

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