Method for dynamically controlling soil deformation from side in real time by repeatable reversible grouting

Abstract

The invention discloses a method for dynamically controlling soil deformation from the side in real time by repeatable reversible grouting. A grouting device is put into a grouting hole, the grouting device comprises a grouting pipe and an outer sleeve which are coaxially arranged and are fixedly connected together, the upper end of the grouting pipe is connected with a slurry pipe, an inner bag which is connected with the grouting pipe in a sealing mode is arranged on the lower part of the grouting pipe, an outer bag wraps the inner bag, a water inlet and outlet which is located in the outer bag is formed in the lower end of the outer sleeve, the upper end of the outer sleeve is connected with a water pipe, and a water discharge valve is connected to the water pipe. The deformation of the outer bag is dynamically controlled in real time by controlling the water supply amount of the water pipe and the water discharge amount of the water discharge valve according to soil deformation data which are monitored in real time by a control system, after the soil deformation control process is finished and the soil deformation is stable, grouting is conducted on the inner bag through the slurry pipe and the grouting pipe, water is discharged through the water discharge valve, and slurry is adopted to replace water in the outer bag in an equal-pressure and equal-volume mode. According to the method, the soil deformation can be dynamically, repeatedly and reversely adjusted in real time.

Description

technical field [0001] The invention relates to the technical field of foundation, foundation engineering and underground engineering construction, in particular to a real-time dynamic repeatable reversible grouting method for controlling soil deformation from the side. Background technique [0002] Underground engineering construction will generally have a certain impact on the surrounding environment. For example, precipitation and earthwork excavation in deep foundation pit engineering will cause uplift of the soil at the bottom of the foundation pit, horizontal and vertical displacement of the surrounding soil, and even affect the surrounding subway. Tunnel and building safety, so in the process of underground engineering construction, it is necessary not only to ensure the stability of the underground engineering structure itself, but also to strictly control the deformation of the underground engineering structure itself and the surrounding soil. [0003] At present, t...

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Problems solved by technology

[0003] At present, the control effect of sleeve valve pipe grouting technology and single-point capsule grouting method on soil deformation cannot meet expectations well, and the main defects are as follows:

Sleeve valve grouting and single-point capsule grouting are used to control soil deformation, only one grouting can be performed, and it is difficult to adjust the grouting amount in real time according to soil deformation during the grouting process

[0005] 2) There is no repeatability of sleeve valve grouting and single-point capsule grouting

With sleeve valve pipe grouting and single-point capsule grouting, only multiple rows of grouting holes can be drilled, and one grouting hole cannot be reused. When the site conditions are limited, it may be difficult to drill multiple rows of grouting holes. Poor construction convenience and high cost

[0006] 3) There is no reversibility for sleeve valve grouting and single-point capsule grouting

After the soil deformation is controlled by grouting, further engineering construction may cause the soil deformation to change in the opposite direction. Using sleeve valve pipe grouting and single-point capsule grouting, new grouting can only be installed on the opposite side of the control area. holes instead of reusing existing grout holes

[0007] In summary, sleeve valve grouting and single-point capsule grouting are difficult to adjust the grouting volume in real time, the deformation can not be adjusted multiple times, and the soil deformation can not be reversed.

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