AU2019101696A4 - A Circulating Layered Injection Device - Google Patents
A Circulating Layered Injection Device Download PDFInfo
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- AU2019101696A4 AU2019101696A4 AU2019101696A AU2019101696A AU2019101696A4 AU 2019101696 A4 AU2019101696 A4 AU 2019101696A4 AU 2019101696 A AU2019101696 A AU 2019101696A AU 2019101696 A AU2019101696 A AU 2019101696A AU 2019101696 A4 AU2019101696 A4 AU 2019101696A4
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- AU
- Australia
- Prior art keywords
- pipe
- grout
- injection
- injection pipe
- stopper
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Abstract
The invention discloses a circulating layered injection device, comprising an inner injection pipe, an outer injection pipe and a grout inlet pipe, a storage tank connected to the mixing tank and a control cabinet connected to the storage tank. One end of the mixing tank is connected to the inner injection pipe through the grout inlet pipe. The outer injection pipe is arranged outside the inner injection pipe, and a one-way check valve is arranged between the inner injection pipe and the outer injection pipe. The outer injection pipe is connected to the grout separator through a return pipe. The benefits of the invention are to realize circulating injection by means of the return pipe and grout separator, and layered injection by means of the external airbag, which has a good injection reinforcement effect on the crushed surrounding rock under complicated geological conditions, and can effectively reduce cost and improve work efficiency. 11-2 15 1-1-31-3 -H I 1 1 2-4 8\ Figure 1
Description
The invention relates to an injection device, in particular to a circulating layered injection device, belonging to the technical field of construction equipment.
Background Technology
In the construction process of tunnel or roadway, the stress of surrounding rock is often redistributed due to excavation, which results in the crushing of surrounding rock within the range of excavation and large deformation or collapse, endangering the safety of construction personnel and equipment. In order to ensure the construction safety and reduce the unnecessary loss of manpower and material resources, the injection method is usually used to reinforce the broken surrounding rock.
After the excavation of the tunnel or roadway, the surrounding rock consists of the porous crack wall layer composed of shotcrete, that is, the shotcrete bolting support layer; gravel layer filled with gravel behind the wall, referred to as backwall layer; fractured rock medium, that is, surrounding rock layer from the outside to the inside. Traditionally, the surrounding rock is usually reinforced by one-time injection, that is, the injection pipe is inserted into the surrounding rock for grouting. An obvious disadvantage of this method is that the grout flows back to the gravel layer through the fissure channel. As the fissure channel into the surrounding rock is small, it has a large resistance to grouting. However, as the space of the gravel layer is relatively large, the injection pressure does not rise for a long time due to the existence of the pressure relief channel. The injection pressure begins to rise after filling a large number of voids in the gravel layer with grout in the later stage. However, the grout at the front of the fracture space injected in the early stage has blocked the fissure channel due to consolidation, and
2019101696 24 Dec 2019 the grout cannot diffuse to the deep part of the surrounding rock along the fissure channel, which results in the poor diffusion effect of the grout injected by the first grouting into the deep part of the surrounding rock.
Traditionally, pure pressure grouting is adopted, that is, the grout is pressed into the borehole at one time and diffused into the surrounding rock crevices. During grouting, the grout flows unidirectionally from the grouting machine to the borehole without the grout backflow. This method increases the consumption of grout, reduces the utilization rate of grout and increases the cost of injection.
Summary of the Invention
An object of the present invention is to provide a circulating layered injection device in order to solve the above problems.
The invention achieves the above purpose through the following technical scheme: it is a circulating layered injection device comprising an inner injection pipe, an outer injection pipe and a grout inlet pipe. The grout inlet pipe is connected to the inner injection pipe and the first control valve; the inner injection pipe is provided with injection holes; the other end of the first control valve is connected to the mixing cylinder; the mixing cylinder is connected to the feed pipe; the other end of the feed pipe is connected to the storage tank; the storage tank is connected to the control cabinet; the outer injection pipe is connected to the grout return pipe; the outer injection pipe is distributed with injection holes. The grout of the return pipe flows into the grout separator for recycling. The grout separator separates waste residue from raw material through the centrifuge; the raw material enters the storage tank through the feed delivery pipe; the grout stopper is arranged on the top of the outer injection pipe, and the inn injection pipe passes through the top stopper. The top grout stopper has its outer side against the inner wall of the outer injection pipe; the one-way check valve is arranged in the middle of the outer injection pipe;
2019101696 24 Dec 2019 the one-way check valve only allows the grout to flow from the bottom to the top; the external airbag is arranged at the same height as the one-way check valve, which is connected to the air delivery pipe.
As a further aspect of the present invention, the grout inlet pipe is provided with the first pressure gauge and the second control valve at the grout inlet.
As a further aspect of the present invention, the top grout stopper has its outer side against the inner wall of the outer injection pipe and blocks the grout inlet.
As a further aspect of the present invention, the one-way check valve is closely fitted to the inner wall of the outer injection pipe.
As a further aspect of the present invention, the one-way check valve is composed of a spring, a grout return passage, a rubber washer, a stopper, an inner pipe passage and an outer injection pipe. The spring is placed above the stopper, and the stopper is arranged inside the grout return passage (8-2), the inner pipe passage is arranged inside the external airbag, and the rubber washer is arranged between the inner pipe passage and the external airbag.
As a further aspect of the present invention, the grout return pipe is connected with the third control valve and the second pressure gauge.
The invention has the advantages of reasonable design, automatic and accurate control of feeding, material saving and labor saving. The grouting method is divided into shallow grouting and deep grouting, realizing the layered grouting. After grouting, the broken surrounding rock can be recombined to improve the strength of surrounding rock and the grouting effect. Recycling is achieved through grout recovery and separation of the raw materials, further reducing costs.
2019101696 24 Dec 2019
Brief Description of the Drawings
FIG. 1 is the structure diagram of the invention;
FIG. 2 is the structure diagram of the one-way valve of the invention;
FIG. 3 is the structure diagram of the first injection of the present invention;
FIG. 4 is the structure diagram of the second injection of the present invention.
In the figure: 1-1, first control valve, 1-2, second control valve, 1-3, third control valve, 2-1, feed delivery pipe, 2-2, feed pipe, 3, mixing cylinder, 4, storage tank, 5, grout separator, 6, control cabinet, 7, inner injection pipe, 8, one-way check valve, 8-1, spring, 8-2, grout return passage, 8-3, rubber washer, 8-4, inner pipe passage, 8-5, stopper, 8-6, external airbag, 9, outer injection pipe, 10, top grout stopper, 111, first pressure gauge, 11-2, second pressure gauge, 12, grout inlet pipe, 13, grout return pipe, 14, injection hole and 15, air delivery pipe.
Detailed Description of the Presently Preferred Embodiments
The technical scheme in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the embodiments described are only a part of the invention and not all of the embodiments. Embodiments based on the invention and all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of the present invention.
Please refer to figures 1 ~ 4. It is a circulating layered injection device comprising an inner injection pipe 7, an outer injection pipe 9, and a grout inlet pipe 12. It is characterized in the fact that the grout inlet pipe 12 is connected with the inner injection pipe 7 and the first control valve 1-1; the inner injection pipe 7 is
2019101696 24 Dec 2019 provided with injection holes 14; the mixing cylinder 3 is connected to the other end of the first control valve 1-1; the mixing cylinder 3 is connected to the feed pipe 2-2, the other end of the feed pipe 2-2 is connected to the storage tank 4; the storage tank 4 is connected to the control cabinet 6; the outer injection pipe 9 is connected to the grout return pipe 13; the outer injection pipe 9 is distributed with injection holes 14; the grout of the return pipe 13 flows into the grout separator 5 for recycling; the grout separator 5 separates waste residue from raw material through the centrifuge, and the raw material enters the storage tank 4 through the feed delivery pipe 2-1; the grout stopper 10 is arranged on the top of the outer injection pipe 9; the inner injection pipe 7 passes through the top grout stopper 10, and the top grout stopper 10 has its outer side against the inner wall of the outer injection pipe 9; the one-way check valve 8 is provided in the middle of the outer injection pipe 9, the one-way check valve 8 only allows the grout to flow from the bottom to the top; the external airbag 8-6 is arranged at the same height as the oneway check valve 8, which is connected to the air delivery pipe 15.
Further, in the embodiment of the present invention, the grout inlet pipe 12 is provided with the first pressure gauge 11-1 and the second control valve 1-2 at the grout inlet for reading the injection pressure and controlling the injection.
Further, in the embodiment of the present invention, the top stopper 10 has its outer side against the inner wall of the outer injection pipe 9 for blocking the grout inlet.
Further, in the embodiment of the present invention, the one-way check valve 8 is closely fitted to the inner wall of the outer injection pipe 9 to prevent the grout from flowing from the shallow injection surface into the deep injection surface.
Further, in the embodiment of the present invention, the one-way check valve 8 is
2019101696 24 Dec 2019 composed of a spring 8-1, a grout return passage 8-2, a rubber washer 8-3, a stopper 8-5, an inner pipe passage 8-4 and an outer injection pipe 9. The spring 8-1 is placed above the stopper 8-5, and the stopper 8-5 is arranged inside the grout return passage 8-2, the inner pipe passage 8-4 is arranged inside the external airbag 8-6, and the rubber washer 8-3 is arranged between the inner pipe passage 8-4 and the external airbag 8-6.
Further, in the embodiment of the present invention, the grout return pipe 13 is connected to the third control valve 1 -3 and the second pressure gauge 11-2 for reading the grout return pressure and controlling the injection.
Specifically, the external airbag 8-6 is arranged along the outer wall of the outer injection pipe 9. When the external airbag 8-6 is aerated through the air delivery pipe 15, the airbag expands and blocks the connection between the shallow injection area and the deep injection area;
During deep injection, the inner injection pipe 7 reaches the deep injection area through the inner pipe passage 8-4, the pressure forces the spring 8-1 to compress, the stopper 8-5 moves upward, and the grout flows into the superstructure through the grout return pipe 8-2;
During shallow injection, the inner injection pipe 7 is inserted into the inner pipe passage 8-4 in the check valve 8, and the rubber washer 8-3 is pressed to form a sealing layer, so that the shallow injection area at the upper part of the pipe is completely isolated from the lower part;
During deep injection, the inner injection pipe 7 passes through the inner pipe passage 8-4 to reach the deep injection area, so that grout inlet is completely in the deep injection area of the pipe.
2019101696 24 Dec 2019
Working principle: when the circulating layered injection device is used:
First, injection in the shallow area:
The first step: fill the external airbag 8-6 through the air delivery pipe 15, the airbag expands and blocks the connection between the shallow injection area and the deep injection area;
The second step: input to control cabinet 6 data on the relationship between grout ratio and dosage, and the storage tank 4 feeds the grout to the mixing cylinder 3 through the feed pipe 2-2, and grout is prepared in the mixing cylinder 3;
The third step: open the control valves 1-1 and 1-2, and the grout is delivered to the inner injection pipe 7 through the grout delivery pipe 12.
The fourth step: the inner injection pipe 7 is inserted into the inner pipe passage 84 in the check valve 8 to start injection in the shallow area, and the grout flows out through the grout inlet 14.
The fifth step: the excess grout flows into the grout separator 5 through the grout return pipe, and the raw material is separated and enters into the storage tank 4 through the feed delivery pipe 2-1;
Repeat the second step;
After the initial setting of the grout in the shallow area, start injection in the deep area:
2019101696 24 Dec 2019
The first step: the inner injection pipe 7 enters the lower deep area through the inner pipe passage 8-4 for injection, and the grout flows out through the grout inlet 14;
The second step: excess grout enters the upper portion through the grout return passage 8-2 in the one-way check valve 8;
Repeat the fifth step of injection in the shallow area.
It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be embodied in other specific forms without departing from the spirit or essential features of the invention. Thus, in any respect, the embodiments should be regarded as exemplary and nonrestrictive, the scope of the invention being defined by the appended claims and not by the above description. It is therefore intended that all variations falling within the meaning and scope of the equivalents of the claims be encompassed within the present invention. Any reference numerals in the claims should not be taken as limiting the claims involved.
In addition, it should be understood that while the present description is described in terms of embodiment, not each embodiment includes only a separate technical solution, and that such description of the description is for the sake of clarity only. Those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be combined as appropriate to form other embodiments that can be understood by those skilled in the art.
Claims (6)
1. A circulating layered injection device comprises an inner injection pipe (7), an outer injection pipe (9) and a grout inlet pipe (12). It is characterized in the fact that the grout inlet pipe (12) is connected with the inner injection pipe (7) and the first control valve (1-1); the inner injection pipe (7) is provided with injection holes (14); the mixing cylinder (3) is connected to the other end of the first control valve (1-1); the mixing cylinder (3) is connected to the feed pipe (2-2), the other end of the feed pipe (2-2) is connected to the storage tank (4); the storage tank (4) is connected to the control cabinet (6); the outer injection pipe (9) is connected to the grout return pipe (13); the outer injection pipe (9) is distributed with injection holes (14); the grout of the return pipe (13) flows into the grout separator (5) for recycling; the grout separator (5) separates waste residue from raw material through the centrifuge, and the raw material enters the storage tank (4) through the feed delivery pipe (2-1); the grout stopper (10) is arranged on the top of the outer injection pipe (9); the inner injection pipe (7) passes through the top grout stopper (10), and the top grout stopper (10) has its outer side against the inner wall of the outer injection pipe (9); the one-way check valve (8) is provided in the middle of the outer injection pipe (9), the one-way check valve (8) only allows the grout to flow from the bottom to the top; the external airbag (8-6) is arranged at the same height as the one-way check valve (8), which is connected to the air delivery pipe (15).
2. The circulating layered injection device according to claim 1 is characterized in the fact that the grout inlet pipe (12) is provided with the first pressure gauge (11-1) and the second control valve (1-2) at the grout inlet.
3. The circulating layered injection device according to claim 1 is characterized in the fact that the top stopper (10) has its outer side against the inner wall of the outer injection pipe (9) and blocks the grout inlet.
2019101696 24 Dec 2019
4. The circulating layered injection device according to claim 1 is characterized in the fact that the one-way check valve (8) is tightly fitted to the inner wall of the outer injection pipe (9).
5. The circulating layered injection device according to claim 1 is characterized in the fact that the one-way check valve (8) is composed of a spring (8-1), a grout return passage (8-2), a rubber washer (8-3), a stopper (8-5), an inner pipe passage (8-4) and an outer injection pipe (9). The spring (8-1) is placed above the stopper (8-5), and the stopper (8-5) is arranged inside the grout return passage (8-2), the inner pipe passage (8-4) is arranged inside the external airbag (8-6), and the rubber washer (8-3) is arranged between the inner pipe passage (8-4) and the external airbag (8-6).
6. The circulating layered injection device according to claim 1 is characterized in the fact that the grout return pipe (13) is connected to the third control valve (1-3) and the second pressure gauge (11-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019101696A AU2019101696A4 (en) | 2019-12-24 | 2019-12-24 | A Circulating Layered Injection Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019101696A AU2019101696A4 (en) | 2019-12-24 | 2019-12-24 | A Circulating Layered Injection Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019101696A4 true AU2019101696A4 (en) | 2020-02-06 |
Family
ID=69284249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019101696A Ceased AU2019101696A4 (en) | 2019-12-24 | 2019-12-24 | A Circulating Layered Injection Device |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019101696A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704276A (en) * | 2022-06-06 | 2022-07-05 | 中铁四局集团第三建设有限公司 | Water-rich powder fine sand layer tunnel combined grouting reinforcement method and slurry |
-
2019
- 2019-12-24 AU AU2019101696A patent/AU2019101696A4/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704276A (en) * | 2022-06-06 | 2022-07-05 | 中铁四局集团第三建设有限公司 | Water-rich powder fine sand layer tunnel combined grouting reinforcement method and slurry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |