Repeated grouting device for controlling soil deformation and method thereof

Abstract

The invention discloses repeated grouting device for controlling soil deformation. The device comprises a grouting core pipe and an outer sleeve, wherein the outer sleeve comprises two to six arc-shaped pipe pieces which are mutually engaged, a plurality of geotechnical cloth bags are arranged in the outer sleeve, the tops of the plurality of geotechnical cloth bags are flush, the top of each geotechnical cloth bag is higher than the top of the outer sleeve by 0.3-0.5 m, the lengths of the plurality of geotechnical cloth bags can be different, according to the mode that the geotechnical clothbags are sequentially reduced outwards in the radial direction from the center in the outer sleeve, the geotechnical cloth bags with the different lengths are distinguished by different colors. By adopting the device for grouting, the slurry is directly pressurized and injected into the geotechnical cloth bags, so that the size of the slurry is accurately controlled, due to the fact that the plurality of grouting geotechnical cloth bags are adopted, fine control on the soil deformation can be realized by injecting the slurry for many times, meanwhile, deformation control of different soil depths can also be realized by changing the lengths of different geotechnical cloth bags, therefore, in the technology, the grouting times, the grouting depth and the concentrated grouting pressure can beset, and the orientation of force application to the target structure is increased.

Description

technical field [0001] The invention relates to the technical field of foundation and foundation engineering construction, in particular to a multiple grouting device and 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 multiple grouting device and method for controlling the deformation of the soil. Pressure injection into the geotextile bag to achieve accurate control of the volume of the grout. Due to the use of multiple grouting geotextile bags, the fine control of the soil deformation can be achieved by injecting the grout multiple times. At the same time, changing the length of different geotextile bags can also achieve different soil volumes. Depth Warp Control

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