Method used for filling or semi-filling karst to expand grouting reinforcement range

Abstract

The invention provides a method used for filling or semi-filling karst to expand a grouting reinforcement range. The method comprises the following steps: punching assembled grouting equipment into the bottom of a punched grouting hole, and enabling a grouting tube and the upper part of a grouting barrel to be higher than an earth surface; grouting, injecting slurry into a slurry accommodating cavity of the grouting barrel through a rigid grouting tube, pressing a grouting valve by the slurry to extend out and penetrate into a stratum, enabling the first end of an outer sleeve to be close to the inner wall of the grouting barrel, extruding a hole-sealing slide plate by the inner wall of the grouting barrel, overcoming spring elastic force to generate relative sliding with the outer wall ofthe outer sleeve until a through hole of the hole-sealing slide plate, an outer sleeve slurry circulating hole I, an outer sleeve slurry circulating hole II, a sandwich sleeve slurry circulating holeI, a sandwich sleeve slurry circulating hole II, an inner drilled core slurry circulating hole and a grouting dispersing hole are in communication, and enabling the slurry to flow into a to-be-grouted to-be-reinforced stratum. The method greatly reduces drilling workload of a constructor, also expands the grouting reinforcement range, can realize extension and retraction of the grouting valve byonly needing to control grouting pressure, and is simple and convenient in operation.

Description

technical field [0001] The invention relates to the technical field of stratum grouting reinforcement, in particular to a method for expanding the grouting reinforcement range for filling and semi-filling karst. Background technique [0002] Karst, also known as karst, is characterized by the chemical corrosion of water on soluble rocks (calcium carbonate, sulfate, halogen rock, etc.), and includes the mechanical erosion and collapse of water, as well as the carrying out, transfer and redeposition of substances. A collective term for comprehensive geological processes and the phenomena that result from such processes. [0003] The karst area is a geological disaster area, and there are a large number of dissolved soil caves underground. For the excavation of pile foundations, foundation pits, and underground tunnels, it is necessary to pre-treat the dissolved soil caves to ensure construction and operation safety and avoid dissolved soils. Caves induce safety accidents such...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for expanding the scope of grouting reinforcement for filling and semi-filling karst, so as to solve the problem of reducing high-density drilling and expanding the scope of grouting reinforcement

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