Multi-point bag type grouting device for controlling soil deformation and method thereof

Abstract

The invention discloses a multi-point bag type grouting device for controlling soil deformation. The grouting device comprises a sleeve valve pipe, wherein the sleeve valve pipe comprises an outer sleeve pipe and a grouting pipe, a plurality of first rubber rings are arranged between the outer wall of the lower portion of the grouting pipe and the outer sleeve pipe, a plurality of first overflow holes are formed in the pipe body of the outer sleeve pipe, and the outer sides of the first overflow holes are provided with one-way rubber films; and annular grouting bags are tightly and firmly connected with the peripheries of the one-way rubber films of the first overflow hole on the outer pipe sleeve and in the same height of outer pipe sleeve, and protective bag sleeves with cutting marks are arranged on the outer peripheral surfaces of the grouting bags. According to the grouting device, in the grouting process, grout is directly pressurized and injected into the high-elasticity high-strength grouting bags, the size, the position and the shape of the grouting body can be accurately controlled, so that the grout is prevented from being in contact with underground water and a soil body in a liquid state, the influence on the adjacent environment is prevented, and meanwhile, the one-way rubber films are adopted to prevent the grout from flowing back so that fine control and directional deviation rectification of soil body deformation can be realized.

Description

technical field [0001] The invention relates to the technical field of foundation and foundation engineering construction, in particular to a multi-point capsule grouting method for controlling soil deformation. Background technique [0002] With the rapid development of my country's social economy, the progress of modern city construction is accelerating, large-scale comprehensive multi-functional buildings are emerging, and infrastructure construction is also improving day by day. During the excavation of the foundation pit, the unloading effect of the adjacent soil causes the corresponding deformation of the foundation pit enclosure, which causes the corresponding displacement and deformation of the adjacent building foundation or the tunnel outside the pit along with the soil. For example, most of the existing subway tunnels in operation are shield tunnels connected by prefabricated concrete segments and high-strength bolts, which are sensitive to deformation. Excessive...

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Problems solved by technology

[0008] The present invention aims to solve the technical problem that the conventional sleeve valve pipe grouting technology cannot satisfy the technical problem of controlling the deformation of the soil and the position and shape of the grouting body, and provides a multi-point capsule grouting method for controlling the deformation of the soil, that is, the grout is directly pressurized It is injected into the high-elasticity and high-strength grouting bag, so that the grouting can be expanded in a fixed area, and the accurate control of the volume of the grout can be realized. Because the grouting bag is used, the shape of the grout can be controlled, so in this technology, the grouting can be set The length of the bladder along the direction of deviation correction is relatively large, the grouting pressure is concentrated, and the directionality of the force applied to the target structure is increased

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