Series mold bag retrusive type subsection slip casting device and slip casting method

Abstract

The invention relates to a series mold bag retrusive type subsection slip casting device and slip casting method. The series mold bag retrusive type subsection slip casting device comprises a series mold bag device, a retrusive type slip casting pipe and the like; the series mold bag device is composed of three different-length mold bag slip casting steel pipes outside galvanized steel sleeves, an upper mold bag, a middle mold bag and a lower mold bag; slurry outlet holes are distributed in non-mold-bag zones of the galvanized steel sleeves, the mold bag slip casting steel pipes are bundled to the galvanized steel sleeves through iron wires, each slip casting steel pipe corresponds to one corresponding mold bag, the mold bags include the upper mold bag, the middle mold bag and the lower mold bag, and the mold bags are bundled to the galvanized steel sleeves through iron wires; and the retrusive type slip casting pipe is composed of a slip casting pipe, a slurry stopping plug and the like. The invention further discloses a using method of the device. According to the characteristics of retrusive type subsection slip casting, after the mold bags are supported through slip casting, a stratum is naturally divided into three slip casting sections, and conditions are provided for retrusive type subsection slip casting slurry diffusion; and meanwhile, the stratum is extruded in the mold bag supporting process, and subsection slip casting is facilitated.

Description

technical field [0001] The invention relates to the field of grouting, in particular to a device and method for segmented grouting of a series of retreating mold bags. Background technique [0002] Grouting has always been an effective method to deal with bad geology, and has achieved good treatment effects. At present, the commonly used methods of segmental grouting are: (1) Sleeve valve grouting, the process is complicated, the operation is troublesome, and the casing material of the sleeve valve sleeve cannot be constructed when the hole is at an elevation angle; (2) Mold bag grouting, the current The mold bag grouting process has a certain effect in the segmental grouting, but it can only form a layer of shielding wall, the reinforcement range is small, and the reinforcement strength is low. A single mold bag is firm and the grouting pipe can be squeezed and reinforced for the ground , control of grout diffusion, etc. are poor, and direct segmental grouting cannot be pe...

AI Technical Summary

Problems solved by technology

At present, the commonly used methods of segmental grouting are: (1) Sleeve valve grouting, the process is complicated, the operation is troublesome, and the casing material of the sleeve valve sleeve cannot be constructed when the hole is at an elevation angle; (2) Mold bag grouting, the current The mold bag grouting process has a certain effect in the segmental grouting, but it can only form a layer of shielding wall, the reinforcement range is small, and the reinforcement strength is low. A single mold bag is firm and the grouting pipe can be squeezed and reinforced for the ground , The effect of controlling the spread of grout is poor, and it is impossible to directly inject grout in sections

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