CN209941662U

CN209941662U - Soil body slip casting reinforcing apparatus that can dynamic control slip casting volume and hardening opportunity

Info

Publication number: CN209941662U
Application number: CN201920137577.5U
Authority: CN
Inventors: 郑刚; 王若展; 程雪松; 潘军; 刁钰
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-01-25
Filing date: 2019-01-25
Publication date: 2020-01-14
Anticipated expiration: 2029-01-25

Abstract

The utility model discloses a soil body slip casting reinforcing apparatus at dynamic control slip casting volume and hardening opportunity, including the slip casting pipe the top of slip casting pipe is equipped with the slip casting valve the bottom of slip casting pipe is equipped with one-way rubber membrane the intraductal dress of wearing of slip casting is fixed with the water injection pipe, wear out at the top of water injection pipe the slip casting valve, wear out the bottom of water injection pipe one-way rubber membrane the bottom of slip casting pipe is connected with slip casting bag and pipe cap, before the filling, the slip casting bag quilt the pipe cap is protected inside it, the filling back, the slip casting bag is washed out the pipe cap gets into the soil body, and the filling is accomplished the back, the slip casting pipe with the separation of slip casting bag. The utility model discloses can be according to volume, position, shape and the size of the accurate control slip casting of corresponding existing structure deformation control volume, but the existing structure of accurate control slip casting liquid sclerosis opportunity, effective control deformation makes it be in the safety range. And the cost can be reduced.

Description

Soil body slip casting reinforcing apparatus that can dynamic control slip casting volume and hardening opportunity

Technical Field

The utility model belongs to the technical field of foundation and foundation engineering construction, especially, relate to a soil body slip casting reinforcing apparatus that can dynamic control slip casting volume and hardening opportunity.

Background

In recent years, with the continuous development of cities, the demand of urban traffic is increasing, and the development of underground traffic is rising. The unloading of the soil body caused by excavation of the foundation pit can drive the existing structure outside the adjacent pit to displace. The soil body grouting reinforcement method is used as a mature deformation control technology and is widely applied to the aspect of controlling the environmental influence caused by foundation pit excavation. At present, the most widely adopted grouting method is a sleeve valve pipe grouting method, compared with other methods, the method does not need large-scale drilling machinery for hole forming, realizes segmented grouting, can pour any grouting section according to needs, can carry out repeated grouting, and can adopt different grouting materials in one grouting pipe. However, the traditional sleeve valve pipe soil body grouting reinforcement method is not efficient and economical in soil body reinforcement effect, and mainly has the following defects:

first, the conventional sleeve valve grouting method is to directly inject grout into the ground through the sleeve valve, and it is difficult to control the volume, position and shape of the grout. In addition, in water-rich formations, the slurry is easily diluted and even washed away, and is difficult to solidify in a fixed area as a whole.

Secondly, when the sleeve valve pipe is grouted, the time for setting the grout is generally set within 10 s-90 s, and the curing time cannot be controlled.

Thirdly, in general, as the excavation of the foundation pit proceeds, the deformation of the soil body is a dynamic increasing process, and the reinforcement prevention and control needs to be performed by real-time grouting or multiple times of grouting in the excavation process of the foundation pit lasting for several months. The traditional sleeve valve pipe grouting technology cannot perform dynamic grouting adjustment on deformation of a soil body, once grouting is completed, the sleeve valve pipe is difficult to utilize for supplementary grouting of slurry to perform continuous reinforcement control on soil body deformation, and the sleeve valve pipe needs to be newly arranged for grouting, so that the cost is high.

Therefore, the invention provides a soil mass grouting reinforcement device capable of dynamically controlling grouting amount and hardening time, so as to solve the main defects of soil mass grouting reinforcement in the prior art.

Disclosure of Invention

The utility model discloses a solve the technical problem that exists among the well-known technology and provide a soil body slip casting reinforcing apparatus when can dynamic control slip casting volume and sclerosis, adopt the device to carry out the slip casting to the soil body and consolidate with low costs, effectual, can realize the meticulous control to existing structural deformation.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: the utility model provides a soil body slip casting reinforcing apparatus that can dynamic control slip casting volume and hardening opportunity, includes the slip casting pipe the top of slip casting pipe is equipped with the slip casting valve the bottom of slip casting pipe is equipped with one-way rubber membrane the intraductal dress of wearing of slip casting is fixed with the water injection pipe, the top of water injection pipe is worn out the slip casting valve, the bottom of water injection pipe is worn out one-way rubber membrane the bottom of slip casting pipe is connected with slip casting bag and pipe cap, before the filling, the slip casting bag by the pipe cap is inside, after the filling, the slip casting bag washes out the pipe cap gets into the soil body, after the filling, the slip casting pipe with the slip casting bag separation.

On the basis of the above scheme, the utility model discloses following improvement has still been made:

the diameter of slip casting pipe is 80 ~ 100mm, the diameter of water injection pipe is 10 ~ 20 mm.

The grouting pipe is made of a PVC pipe; the water injection pipe is made of a rubber pipe.

The grouting capsule is made of high-strength and high-elasticity rubber.

The utility model has the advantages and positive effects that:

one) can accurately control the grouting amount according to the deformation control amount of the corresponding existing structure: firstly, water is pressurized and injected into the grouting bag, the existing structure is monitored in real time to ensure that the deformation of the existing structure is in a safety range in real time until the engineering is finished, and accurate control on the needed grouting liquid is realized.

Secondly) the hardening time of grouting liquid can be accurately controlled, because the deformation of the existing structure is a dynamic process during foundation pit excavation, the device firstly enables the deformation of the existing structure to be in a safe range by continuously adjusting the volume of water in the grouting bag until the engineering is finished, and then replaces the water body in the bag with the equal volume of grouting liquid, so that the grouting liquid is quickly solidified within 10-90 s, and the accurate control of the hardening time is realized.

Thirdly), the volume, the shape, the position and the size of the grouting body are determined by the deformation of the water body along with the soil body (the existing structure), so that the volume, the position, the shape and the size of the grouting body can be accurately controlled, and the deformation of the existing structure is effectively controlled.

Fourthly) the grouting pipe and the water injection pipe can be used for multiple times, and the construction cost is low.

Drawings

Fig. 1 is a schematic structural view of the initial state of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural view of the utility model after water injection;

FIG. 4 is a schematic structural view of the present invention during grouting;

fig. 5 is a schematic structural view after the grouting of the utility model is completed;

fig. 6 is the utility model discloses the slip casting is accomplished the back and is proposed the structural schematic diagram when slip casting pipe.

In the figure: 1-grouting valve, 2-water injection valve, 3-grouting pipe, 4-water injection pipe, 5-pipe cap, 6-one-way rubber membrane, 7-grouting bag, 8-water, 9-grout.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:

referring to fig. 1 to 6, a soil mass grouting reinforcement device capable of dynamically controlling grouting amount and hardening time comprises a grouting pipe 3, a grouting valve 1 is arranged at the top end of the grouting pipe 3, a one-way rubber membrane 6 is arranged at the bottom end of the grouting pipe 3, a water injection pipe 4 is fixedly arranged in the grouting pipe 3 in a penetrating manner, the top of the water injection pipe 4 penetrates through the grouting valve 1, the bottom end of the water injection pipe 4 penetrates through the one-way rubber membrane 6, a grouting bag 7 and a pipe cap 5 are connected to the bottom end of the grouting pipe 4, the grouting bag 7 is sealed and protected inside the pipe cap 5 before grouting, the grouting bag 7 is flushed away from the pipe cap 5 to enter a soil mass after grouting, and the grouting pipe 3 is separated from the grouting bag 7 after grouting.

Above-mentioned slip casting valve 1 and water injection valve 2 are used for preventing during slip casting or the water injection liquid spill over, and one-way rubber membrane 6 is used for sealed, only allows the material from last one-way passing down, and the thick liquid is gone up back when rivers flow into slip casting pipe 3 and slip casting during can preventing the water injection.

In this embodiment, the diameter of the grouting pipe 3 is 80-100 mm, and the diameter of the water injection pipe 4 is 10-20 mm. The grouting pipe 3 is made of a PVC pipe; the water injection pipe 4 is made of a rubber pipe. The grouting bag 7 is made of high-strength and high-elasticity rubber, and the shape and the size of the grouting bag are determined according to the deformation of a soil body (an existing structure) to be controlled.

The utility model discloses a use method:

one) mounting

And drilling a hole at a set position, and then putting the soil body grouting reinforcement device into the hole.

II) water injection

The water injection valve is opened, the water injection gun injects water, and the grouting bag 3 can burst the pipe cap 5 to enter the soil body along with the injection of water 8 due to the good elasticity and strength of the grouting bag 7. The deformation of the protected existing structure needs to be monitored in real time during water injection, the water injection amount is adjusted according to the deformation of the existing structure, when the deformation of the existing structure is increased, the water injection amount is increased, otherwise, the water injection amount is reduced, the deformation of the existing structure is always in a safety range, and the water injection is stopped after the engineering is finished and the deformation of the existing structure is stable.

Thirdly) grouting and draining

And opening the grouting valve 1, injecting grout 9 by using a grouting gun, and enabling the grout 9 to break the one-way rubber film 6 and enter the grouting bag 7. While grouting, the water 8 is discharged through the water injection valve 2 until the equal volume of the grout displaces all the water in the grouting bag 7. And grouting pressure is detected while grouting, and once the grouting pressure is abnormal, the grouting pressure is immediately adjusted, so that the soil body is prevented from being greatly disturbed by improper grouting speed. The slurry adopts a double-liquid mixed solution of cement and water glass, and specific preparation parameters are finally determined by a full-time experimenter through multiple tests and by combining actual conditions. And during grouting, corresponding grouting pressure, grouting time and grouting amount are adopted according to actual conditions. When the water 8 in the grouting capsule 7 is completely replaced and monitoring shows that the deformation of the existing structure is within a safe range, grouting is stopped.

Fourthly) realizing soil body reinforcement

And the grouting pipe 3 and the water injection pipe 4 are pulled out, and the grouting bag is permanently remained in the soil body along with the grout, so that reinforcement is realized.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.

Claims

1. A soil body grouting reinforcement device capable of dynamically controlling grouting amount and hardening time comprises a grouting pipe and is characterized in that a grouting valve is arranged at the top end of the grouting pipe, a one-way rubber membrane is arranged at the bottom end of the grouting pipe, a water injection pipe is fixedly arranged in the grouting pipe in a penetrating mode, the top of the water injection pipe penetrates out of the grouting valve, the bottom end of the water injection pipe penetrates out of the one-way rubber membrane, a grouting bag and a pipe cap are connected to the bottom end of the grouting pipe, the grouting bag is sealed and protected inside the grouting pipe by the pipe cap before grouting, the grouting bag is flushed out of the pipe cap to enter a soil body after grouting, and the grouting pipe is separated from the grouting bag after grouting is completed.

2. A soil body grouting reinforcement device capable of dynamically controlling grouting amount and hardening time according to claim 1, characterized in that the diameter of the grouting pipe is 80-100 mm, and the diameter of the water injection pipe is 10-20 mm.

3. A soil body grouting reinforcement device capable of dynamically controlling grouting amount and hardening time according to claim 1 or 2, characterized in that the grouting pipe is made of PVC pipe; the water injection pipe is made of a rubber pipe.

4. A soil mass grouting reinforcement device capable of dynamically controlling grouting amount and hardening time as claimed in claim 1, wherein the grouting bag is made of high-strength and high-elasticity rubber.