Advanced grouting device

Abstract

The utility model discloses an advanced grouting device which comprises a grout stop bag, an upper grout inlet system, a lower grout inlet system and a grout return system, and the upper grout inlet system is composed of a steel pipe, a hose, a pressure gauge, a flow meter, a grouting pipe and a tee joint; the lower slurry inlet system is composed of a thin steel pipe, a thin hose, a tee joint, a hose, a pressure gauge, a flow meter and a grouting pipe. The slurry return system comprises a hose, a flow meter, a grouting pipe, a right-angle two-way joint and a steel pipe with a bent pipe; the ends of the steel pipes and the thin steel pipes are wrapped and fixed through the grout stopping bags, and a closed system with upper and lower channels for grout feeding and returning is formed. Wherein the steel pipe is connected with the upper slurry inlet hose and the slurry return hose, the thin steel pipe is connected with the lower slurry inlet hose, pressure gauges and flow meters are arranged for monitoring real-time parameters, and redundant slurry flows back to the slurry pool through the steel pipe with the bent pipe. The grouting device is compact in structure and easy and convenient to operate, grouting efficiency and quality are improved, cracks can be effectively plugged, the stability of surrounding rock is improved, and the grouting device has good adaptability and economic benefits in advance support and anti-seepage reinforcement.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel engineering construction technology, specifically relating to an advanced grouting device. Background Technology

[0002] Tunnel construction often encounters adverse geological conditions such as mudslides, water inrushes, faults, and soft rock. In sections with these challenging geological conditions, pre-grouting is used to achieve pre-blocking of water and pre-consolidation of the surrounding rock. To meet the pressure requirements for grouting, concrete grout-stopping walls are commonly poured. However, the pouring and removal of these walls are time-consuming, labor-intensive, and costly. Furthermore, pure pressure grouting lacks effective verification of grouting results. Therefore, there is an urgent need for a pre-grouting device to improve the efficiency of pre-grouting, reduce costs, and enhance grouting effectiveness. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an advanced grouting device that is compact in structure, easy to operate, can improve grouting efficiency and quality, can effectively seal cracks and enhance the stability of surrounding rock, and has good adaptability and economic benefits in advanced support and seepage prevention reinforcement.

[0004] The technical solution of this utility model is as follows:

[0005] An advanced grouting device includes: a grout-stopping bag, an upper grouting system, a lower grouting system, and a grout return system. The upper grouting system includes: a steel pipe, a flexible hose, a pressure gauge, a flow meter, a grouting pipe, and a tee. The lower grouting system includes: a thin steel pipe, a thin flexible hose, another tee, a flexible hose, a pressure gauge, a flow meter, and another grouting pipe. The grout return system includes: a flexible hose, a flow meter, a grouting pipe, a right-angle tee, and a steel pipe with a bend. One end of the steel pipe extends into the grouting hole, and the other end of the steel pipe is connected to the flexible hose of the upper grouting system and the flexible hose of the grout return system via the tee. The flexible hose of the upper grouting system is equipped with a pressure gauge and a flow meter, and the flexible hose of the upper grouting system is connected to the grouting pipe. One end of the hose of the grout return system is connected to the steel pipe through a tee of the upper grout inlet system. The other end of the hose of the grout return system is connected to one end of the steel pipe with a bend through a right-angle tee. The other end of the steel pipe with a bend is connected to the grout return pool through another hose of the grout return system. One end of the thin steel pipe extends into the grouting hole. The other end of the thin steel pipe is fixedly connected to one end of the thin hose. The other end of the thin hose is connected to one end of the hose of the lower grout inlet system through another tee. The hose of the lower grout inlet system is also equipped with a pressure gauge and a flow meter. The other end of the hose of the lower grout inlet system is fixedly connected to another grouting pipe. The grout stop bag wraps and fixes the ends of the steel pipe and the thin steel pipe.

[0006] Furthermore, the grout-stopping bag is filled with cement grout, which covers the ends of the steel pipe and the thin steel pipe. The grout-stopping bag is made of geotextile, and steel wire or binding wire is tied to the outside of the grout-stopping bag.

[0007] Furthermore, the other end of the steel pipe is fixedly connected to the tee of the upper slurry inlet system via a straight connector, and a gate valve is installed on the straight connector.

[0008] Furthermore, the hose of the upper grouting system is fixedly connected to the grouting pipe of the upper grouting system via another straight connector.

[0009] Furthermore, a gate valve is provided on the right-angle two-way valve.

[0010] Furthermore, a gate valve is installed on the tee of the lower slurry inlet system.

[0011] Furthermore, the lower grouting system includes two hoses. One end of the first hose is fixedly connected to the tee of the lower grouting system, and the other end of the first hose is connected to the second hose through another straight connector. A pressure gauge and a flow meter are installed on the other straight connector. The second hose is fixedly connected to the grouting pipe of the lower grouting system through another straight connector.

[0012] The beneficial effects of this utility model are:

[0013] 1. Dual-channel grouting improves grouting efficiency: This utility model combines an upper grouting system and a lower grouting system to achieve simultaneous or layered grouting through dual channels, resulting in more uniform grout penetration, effectively improving grouting efficiency and quality, and reducing blind spots and grout leakage.

[0014] 2. The grout-stopping bag is tightly sealed to prevent grout leakage: The grout-stopping bag of this utility model is filled with cement grout and reinforced by geotextile and external steel wire. It can effectively wrap the ends of steel pipes and thin steel pipes, forming a good sealing environment to prevent grout leakage or impurities from entering.

[0015] 3. Multiple valves and pressure / flow monitoring ensure safety and controllability: Each system pipeline in this utility model is equipped with a gate valve, which can promptly shut off or adjust the grouting channel; pressure gauges and flow meters are provided for real-time detection and control to avoid pipeline blockage or safety hazards caused by overpressure or uncontrolled flow.

[0016] 4. Improved slurry return system, reducing waste and preventing pipe blockage: This utility model uses a right-angle T-junction and a steel pipe with a bend to return excess slurry to the slurry return tank, which can be recycled and save costs; at the same time, it avoids sedimentation or blockage caused by excessive slurry residue in the pipe.

[0017] 5. Compact structure, convenient installation and operation: The entire device of this utility model is connected by tees, straight sections, right-angle tees, and various hoses and steel pipes, with a simple layout and clear functional zoning; the grout-stopping bag can be quickly tied and fixed on site, which is convenient for field construction and subsequent disassembly and maintenance;

[0018] 6. High adaptability and suitable for various complex geological conditions: This utility model flexibly combines the upper and lower grouting channels and the grouting return channels, which can carry out precise grouting according to the distribution of surrounding rock fissures and seepage requirements, significantly improving the density; and can effectively seal the seepage channels, enhance the stability of the strata, and is suitable for various engineering fields such as advanced support and curtain anti-seepage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an advanced grouting device according to this utility model.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the grout-stopping bag of an advanced grouting device according to this utility model before grouting.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the grout-stopping bag of an advanced grouting device according to this utility model after grouting.

[0022] Figure 4 This is a schematic diagram of the planar structure of the steel pipe of an advanced grouting device according to this utility model.

[0023] In the diagram: 1-grouting hole, 2-steel pipe, 3-grout stop bag, 4-thin steel pipe, 5-thin flexible hose, 6-straight pipe, 7-gate valve, 8-flexible hose, 9-pressure gauge, 10-flow meter, 11-grouting pipe, 12-tee, 13-right-angle tee, 14-steel pipe with bend, 15-cement grout. Detailed Implementation

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1-4As shown, an advanced grouting device includes: a grout stop bag 3, an upper grouting system, a lower grouting system, and a return grouting system. The upper grouting system includes: a steel pipe 2 (DN25), a flexible hose 8 (DN25), a pressure gauge 9, a flow meter 10, an injection pipe 11, and a tee 12. The lower grouting system includes: a thin steel pipe 4 (DN10), a thin flexible hose 5 (DN10), another tee 12, a flexible hose 8, a pressure gauge 9, a flow meter 10, and another injection pipe 11. The return grouting system includes: a flexible hose 8, a flow meter 10, an injection pipe 11, a right-angle tee 13, and a steel pipe 14 with a bend. One end of the steel pipe 2 extends into the grouting hole 1, and the other end of the steel pipe 2 is connected to the flexible hose 8 of the upper grouting system and the flexible hose 8 of the return grouting system via the tee 12. The flexible hose 8 of the upper grouting system is equipped with a pressure gauge 9 and a flow meter 10. The hose 8 of the grout inlet system is connected to the grouting pipe 11; one end of the hose 8 of the grout return system is connected to the steel pipe 2 through the tee 12 of the upper grout inlet system, and the other end of the hose 8 of the grout return system is connected to one end of the steel pipe 14 (DN25) with a bend through the right-angle tee 13. The other end of the steel pipe 14 with a bend is connected to the grout return pool through another hose 8 of the grout return system; one end of the thin steel pipe 4 extends into the grouting hole 1, and the other end of the thin steel pipe 4 is fixedly connected to one end of the thin hose 5. The other end of the thin hose 5 is connected to one end of the hose 8 of the lower grout inlet system through another tee 12. The hose 8 of the lower grout inlet system is also equipped with a pressure gauge 9 and a flow meter 10. The other end of the hose 8 of the lower grout inlet system is fixedly connected to another grouting pipe 11. The grout stop bag 3 wraps and fixes the ends of the steel pipe 2 and the thin steel pipe 4.

[0026] Preferably, the grout-stopping bag 3 contains cement grout 15, which wraps around the ends of the steel pipe 2 and the thin steel pipe 4. The grout-stopping bag 3 is made of geotextile, and steel wire or binding wire is tied to the outside of the grout-stopping bag 3.

[0027] Preferably, the other end of the steel pipe 2 is fixedly connected to the tee 12 of the upper slurry inlet system via a straight pipe 6, and a gate valve 7 is provided on the straight pipe 6.

[0028] Preferably, the hose 8 of the upper grouting system is fixedly connected to the grouting pipe 11 of the upper grouting system via another straight pipe 6.

[0029] Preferably, a gate valve 7 is provided on the right-angle two-way valve 13.

[0030] Preferably, a gate valve 7 is provided on the tee 12 of the lower slurry inlet system.

[0031] Preferably, the lower grouting system includes two hoses 8. One end of the first hose 8 is fixedly connected to the tee 12 of the lower grouting system, and the other end of the first hose 8 is connected to the second hose 8 through another straight connector 6. The other straight connector 6 is equipped with a pressure gauge 9 and a flow meter 10. The second hose 8 is fixedly connected to the grouting pipe 11 of the lower grouting system through another straight connector 6.

[0032] During use, a tracked pipe roof machine is used to create grouting hole 1. The surrounding rock conditions inside the hole are observed to determine the length of steel pipe 2 and the length of grout stop bag 3 extending into the hole. The length of grout stop bag 3 is determined based on the water pressure. Grout stop bag 3 is wrapped with high-density geotextile around steel pipe 2. The geotextile is cut according to the diameter of the grouting hole. The geotextile wraps and fixes steel pipe 2 and thin steel pipe 4 together. The geotextile is fixed to steel pipe 2 and thin steel pipe 4 with tape, and the two ends are tied with wire. The thin steel pipe 4 is connected to the flexible hose 5 and extends into the hole through a tee 12 to connect with the lower grouting system. A gate valve 7 is installed at tee 12 to prevent abnormal grouting and hole blockage. After checking that all connections are secure, grouting begins. The cement grout supports grout stop bag 3 and makes it contact the rock wall of the grouting hole.

[0033] After the grout stop bag 3 reaches its strength, it is connected to the upper grouting system and the grout return system. The grout return system is connected to the upper grouting system hose 8 and steel pipe 2 at the grouting hole 1 opening using a tee 12. If there is any abnormality in the grouting process, the grout can be returned through the grout return system to avoid pipe blockage, and at the same time, stable pressure grout return is achieved to ensure the grouting effect.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. An advanced grouting device, characterized by, The invention relates to a cement grouting device, which comprises a grouting stopper (3), an upper grouting system, a lower grouting system and a grouting return system, wherein the upper grouting system comprises a steel pipe (2), a hose (8), a pressure gauge (9), a flow meter (10), a grouting pipe (11) and a tee joint (12), the lower grouting system comprises a thin steel pipe (4), a thin hose (5), another tee joint (12), a hose (8), a pressure gauge (9), a flow meter (10) and another grouting pipe (11), and the grouting return system comprises a hose (8), a flow meter (10), a grouting pipe (11), a right-angle two-way joint (13) and a steel pipe with a bend (14); one end of the steel pipe (2) extends into a grouting hole (1), the other end of the steel pipe (2) is connected with the hose (8) of the upper grouting system and the hose (8) of the grouting return system through the tee joint (12) respectively, the hose (8) of the upper grouting system is provided with the pressure gauge (9) and the flow meter (10), and the hose (8) of the upper grouting system is connected with the grouting pipe (11); one end of the hose (8) of the grouting return system is connected with the steel pipe (2) through the tee joint (12) of the upper grouting system, the other end of the hose (8) of the grouting return system is connected with one end of the steel pipe with a bend (14) through the right-angle two-way joint (13), and the other end of the steel pipe with a bend (14) is connected with a grouting return tank through another hose (8) of the grouting return system; one end of the thin steel pipe (4) extends into the grouting hole (1), the other end of the thin steel pipe (4) is fixedly connected with one end of the thin hose (5), the other end of the thin hose (5) is connected with one end of the hose (8) of the lower grouting system through another tee joint (12), the hose (8) of the lower grouting system is also provided with the pressure gauge (9) and the flow meter (10), and the other end of the hose (8) of the lower grouting system is fixedly connected with the other grouting pipe (11), and the grouting stopper (3) wraps and fixes the end of the steel pipe (2) and the thin steel pipe (4). The grouting stopper (3) is filled with cement grout (15), the cement grout (15) wraps the end of the steel pipe (2) and the thin steel pipe (4), the grouting stopper (3) is made of geotextile, and the outer side of the grouting stopper (3) is bound with steel wire or binding wire.

2. A device for advance grouting according to claim 1, characterized in that The other end of the steel pipe (2) is fixedly connected with the tee joint (12) of the upper grouting system through a straight-through joint (6), and the straight-through joint (6) is provided with a gate valve (7).

3. The device of claim 1, wherein, The hose (8) of the upper grouting system is fixedly connected with the grouting pipe (11) of the upper grouting system through another straight-through joint (6).

4. The device of claim 1, wherein, The right-angle two-way joint (13) is provided with a gate valve (7).

5. The device of claim 1, wherein, The tee joint (12) of the lower grouting system is provided with a gate valve (7).

6. The device of claim 1, wherein, The lower grouting system comprises two hoses (8), one end of a first hose (8) is fixedly connected with the tee joint (12) of the lower grouting system, the other end of the first hose (8) is connected with a second hose (8) through another straight-through joint (6), the other straight-through joint (6) is provided with a pressure gauge (9) and a flow meter (10), and the second hose (8) is fixedly connected with the grouting pipe (11) of the lower grouting system through another straight-through joint (6).

7. The device of claim 1, wherein, ​

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