A tunnel curtain grouting device for strong water pressure state

Abstract

The utility model discloses a kind of tunnel curtain grouting devices for high water pressure state, comprising: double liquid inlet pipe;Slurry valve, slurry valve is connected in double liquid inlet pipe one end;First three-way pipe, first three-way pipe is connected in double liquid inlet pipe other end, and first three-way pipe's other two ends are connected with first inlet pipe and second inlet pipe respectively;Grouting pipe, grouting pipe is connected in slurry valve other end, and flange is fixedly connected on grouting pipe close to slurry valve end;Valve, valve is detachably installed on flange;Barb device, barb device is detachably installed on valve.The utility model safe and reliable tunnel curtain grouting device can solve orifice water interception, slurry leakage control and double liquid slurry mixing and other problems, to realize the safety, efficiency and quality of promotion grouting construction.

Description

Technical Field

[0001] This utility model relates to a grouting device, specifically a tunnel curtain grouting device for use under high water pressure, belonging to the field of tunnel construction technology. Background Technology

[0002] During tunnel construction, groundwater is often encountered in the surrounding rock ahead of the tunnel face, especially when the groundwater pressure is high, which can seriously affect construction safety. To address this issue, curtain grouting is typically used. Curtain grouting technology involves injecting grout into the surrounding rock after drilling to achieve water isolation and reinforce the rock strata, thereby ensuring the smooth progress of tunnel construction. However, grouting under high water pressure still faces several technical challenges:

[0003] 1. Difficulty in water interception at the borehole opening: After drilling, especially under high water pressure, a large amount of water often gushes out from the borehole opening. However, traditional borehole sealing methods are often unable to withstand the huge water pressure, resulting in poor water interception effect. Effective water interception to control the water flow and prevent the water flow from interfering with subsequent grouting has become a technical challenge.

[0004] 2. Grout leakage at the orifice: The grouting process needs to be carried out under high water pressure, so it is necessary to ensure the sealing of the orifice to prevent grout leakage. However, traditional grouting equipment and methods often cannot effectively prevent grout leakage at the orifice under such high water pressure, resulting in grout overflow, wasting materials, and potentially affecting the grouting effect.

[0005] 3. Problem of mixing two-component grouts: Some grouting processes require mixing two-component grouts at the orifice to enhance the grout's effectiveness. However, traditional mixing methods may be difficult to meet the requirements due to water pressure interference or equipment limitations, affecting the grout's consolidation performance and water-stopping effect, making it difficult to control the grouting quality, and even affecting the stability of construction.

[0006] Therefore, the key to solving the above-mentioned technical problems lies in developing an efficient and reliable tunnel curtain grouting device for use under high water pressure. Summary of the Invention

[0007] In view of the many defects and shortcomings existing in the above-mentioned background technology, this utility model has made improvements and innovations, with the aim of providing a safe and reliable tunnel curtain grouting device that can solve problems such as orifice water interception, grout leakage control and two-liquid grout mixing, thereby improving the safety, efficiency and quality of grouting construction.

[0008] To solve the above problems and achieve the above-mentioned invention objectives, this utility model provides a tunnel curtain grouting device under high water pressure conditions, which is achieved by adopting the following design structure and the following technical solution:

[0009] A tunnel curtain grouting device for use under high water pressure conditions, comprising:

[0010] Dual-liquid slurry inlet pipe;

[0011] The slurry stop valve is connected to one end of the dual-liquid slurry inlet pipe.

[0012] The first three-way pipe is connected to the other end of the dual liquid slurry inlet pipe, and the other two ends of the first three-way pipe are respectively connected to the first slurry inlet pipe and the second slurry inlet pipe.

[0013] The grouting pipe is connected to the other end of the grout stop valve, and a flange is fixedly connected to the grouting pipe near the grout stop valve.

[0014] Valves, which can be detachably mounted on flanges;

[0015] The barb device is detachably mounted on the valve.

[0016] Preferably, it also includes a slurry discharge valve, which is connected to the inlet of the dual-liquid slurry inlet pipe via a second tee pipe.

[0017] Preferably, it also includes geotextile disposed on the outside of the barb device.

[0018] Preferably, the connection end of the dual-liquid slurry inlet pipe and the slurry stop valve is connected to a dual-liquid slurry inlet pipe connecting flange;

[0019] The connection end between the grouting pipe and the grout stop valve is connected to a grouting pipe connecting flange.

[0020] Preferably, the two ends of the grout stop valve are connected between the dual-liquid grout inlet pipe connecting flange and the grouting pipe connecting flange by bolt assembly.

[0021] Preferably, the valve is fitted onto the outside of the grouting pipe and connected to the flange by a bolt assembly, wherein a sealing gasket is provided between the valve and the flange.

[0022] Preferably, the barb device includes:

[0023] Fixed tube;

[0024] Fixed pipe flange: The fixed pipe flange is connected to one end of the fixed pipe and is used to connect to the valve.

[0025] Barbs are attached to the outer wall of the fixed tube at equal or unequal intervals.

[0026] Preferably, the inner diameter of the fixing pipe is larger than the outer diameter of the grouting pipe;

[0027] A sealing ring is also provided between the fixed pipe flange and the valve.

[0028] Preferably, the opening of the barb is oriented towards the fixed pipe flange.

[0029] Preferably, the non-connecting ends of the first grout inlet pipe and the second grout inlet pipe are also provided with connectors for connecting to external grouting equipment.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] 1. This utility model integrates the grouting pipe with valves, grout stop valves, dual-liquid grout inlet pipes, grout discharge valves, tees, and other components into a single device. This design effectively prevents water leakage from the orifice and enables operations such as grout stop, grout discharge, and grout mixing during the dual-liquid grout injection process. This ensures the high efficiency and stability of the grouting process and significantly improves the safety, efficiency, and quality of grouting construction.

[0032] 2. The grouting pipe of this utility model is equipped with a barb device, which effectively prevents the grouting pipe from being pushed out during high-pressure grouting, thus ensuring the stability and safety of the grouting operation.

[0033] 3. This utility model, by wrapping geotextile around the barbed device, can effectively seal the gap between the fixing pipe and the surrounding rock hole, thereby achieving a reliable anti-leakage effect during the grouting process;

[0034] 4. This utility model has a valve at the end of the grouting pipe, which can quickly and effectively cut off the flow of high-pressure water in the hole, creating favorable conditions for subsequent grouting operations.

[0035] 5. This utility model provides a rubber sealing gasket between the flange and the valve, ensuring the sealing of the connection under high-pressure grouting conditions and preventing grout leakage;

[0036] 6. This utility model is equipped with a grout stop valve on the dual-liquid grout inlet pipe, which can be quickly closed after grouting is completed, effectively preventing grout backflow and ensuring the grouting effect;

[0037] 7. This utility model is equipped with a grout discharge valve at the inlet of the dual-liquid grout inlet pipe. When used in conjunction with the grout stop valve, it can quickly discharge the residual grout from the grouting machine to the grout stop valve after grouting is completed, effectively preventing the grout from solidifying in the pipe, extending the service life of the equipment and reducing cleaning and maintenance work.

[0038] 8. This utility model sets a first three-way pipe at the end of the dual-liquid grout inlet pipe, which realizes the instant mixing of cement grout and water glass grout before grouting, avoids the problem of premature solidification caused by premature mixing, and ensures the effective consolidation and water-stopping effect of the dual-liquid grout. Attached Figure Description

[0039] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0040] Figure 1 This is one of the usage state diagrams of this utility model;

[0041] Figure 2 This is the second diagram showing the usage state of this utility model;

[0042] Figure 3 This is the third diagram showing the usage state of this utility model;

[0043] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0044] Figure 5 This is a cross-sectional view of the present invention;

[0045] Figure 6 This is an exploded view of this utility model;

[0046] Figure 7 This is the fourth schematic diagram of the usage state of this utility model;

[0047] In the figure, the numbers are as follows: 1—Dual liquid inlet pipe, 2—Stop grout valve, 3—First tee pipe, 4—First inlet pipe, 5—Second inlet pipe, 6—Grouting pipe, 7—Flange, 8—Valve, 9—Barb device, 91—Fixing pipe, 92—Fixing pipe flange, 93—Barb, 10—Grouting drain valve, 11—Second tee pipe, 12—Geotextile, 13—Sealing gasket, 14—Sealing ring. Detailed Implementation

[0048] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Example 1

[0050] As per the instruction manual Figures 1 to 7 As shown, a tunnel curtain grouting device for use under high water pressure includes:

[0051] Dual-liquid slurry inlet pipe 1;

[0052] Slurry stop valve 2 is connected to one end of the dual liquid slurry inlet pipe 1;

[0053] The first three-way pipe 3 is connected to the other end of the double liquid slurry inlet pipe 1, and the other two ends of the first three-way pipe 3 are respectively connected to the first slurry inlet pipe 4 and the second slurry inlet pipe 5.

[0054] Grouting pipe 6 is connected to the other end of grout stop valve 2. A flange 7 is fixedly connected to the grouting pipe 6 near the end of grout stop valve 2.

[0055] Valve 8 is detachably mounted on flange 7;

[0056] The barb device 9 is detachably mounted on the valve 8.

[0057] This invention installs a valve 8 on the flange 7 of the grouting pipe, which enables rapid and effective interception of high-pressure water in the hole, creating favorable conditions for subsequent grouting operations.

[0058] Furthermore, the connection end between the dual-liquid slurry inlet pipe 1 and the slurry stop valve 2 is connected to a dual-liquid slurry inlet pipe connecting flange;

[0059] The grouting pipe 6 is connected to the grout stop valve 2 by a grouting pipe connecting flange.

[0060] Specifically, the two ends of the grout stop valve 2 are connected between the dual liquid grout inlet pipe connecting flange and the grouting pipe connecting flange by bolt assembly.

[0061] In this invention, the bolt assembly includes a bolt and a nut.

[0062] Furthermore, the valve 8 is sleeved on the outside of the grouting pipe 6 and connected to the flange 7 by a bolt assembly, wherein a sealing gasket 13 is provided between the valve 8 and the flange 7.

[0063] In this utility model, the sealing gasket 13 is a rubber sealing gasket, which is ring-shaped, and has several connection holes through it that are adapted to the flange 7.

[0064] Furthermore, the barb device 9 includes:

[0065] Fixed tube 91;

[0066] Fixed pipe flange 92 and fixed pipe flange 82 are connected to one end of fixed pipe 81 and are used to connect to valve 8;

[0067] Barbs 93 are connected to the outer wall of the fixed tube 91 at equal or unequal intervals.

[0068] Specifically, the inner diameter of the fixing pipe 91 is larger than the outer diameter of the grouting pipe 6;

[0069] A sealing ring 14 is also provided between the fixed pipe flange 92 and the valve 8.

[0070] In this utility model, the sealing ring 14 is a rubber sealing ring, which is ring-shaped, and has several connecting holes adapted to the valve 8 through it.

[0071] Furthermore, the opening of the barb 93 is positioned towards the fixed pipe flange 92.

[0072] The grouting pipe of this invention is equipped with a barb device, which can effectively prevent the grouting pipe from being pushed out during high-pressure grouting, thus ensuring the stability and safety of the grouting operation.

[0073] Furthermore, the non-connecting ends of the first grout inlet pipe 4 and the second grout inlet pipe 5 are also provided with connectors for connecting to external grouting equipment.

[0074] In this invention, the first grout inlet pipe 4 is connected to the cement grout injection equipment, and the second grout inlet pipe 5 is connected to the water glass grout injection equipment.

[0075] Example 2

[0076] like Figure 1 and Figure 2 As shown, this embodiment is basically the same as embodiment 1, except that it also includes a slurry discharge valve 10, which is connected to the inlet of the dual liquid slurry inlet pipe 1 through a second three-way pipe 11.

[0077] This invention features a grout discharge valve 10 installed at the inlet of the dual-liquid grout inlet pipe, which works in conjunction with the grout stop valve 2. This allows for the rapid discharge of residual grout from the grouting machine to the grout stop valve 2 after grouting is completed, effectively preventing the grout from solidifying inside the pipe, extending the service life of the equipment, and reducing cleaning and maintenance work.

[0078] Example 3

[0079] like Figure 2 and Figure 3 As shown, this embodiment is basically the same as embodiment 2, except that it also includes geotextile 12 disposed on the outside of the barb device 9.

[0080] This invention effectively seals the gap between the fixing pipe 91 and the surrounding rock hole by wrapping geotextile around the barbed device, thereby achieving a reliable anti-leakage effect during the grouting process.

[0081] In summary, a more specific embodiment of this utility model is as follows:

[0082] Before using the tunnel curtain grouting device with the above-mentioned design structure under high water pressure, it needs to be manufactured and assembled as a backup.

[0083] During assembly:

[0084] The operator first connects the second three-way pipe 11 to the middle of the double liquid slurry inlet pipe 1, and then connects the slurry discharge valve 10 to the non-connection end of the second three-way pipe 11 through the connecting pipe;

[0085] Then, the operator connects the middle end of the first tee pipe 3 to the non-dual liquid slurry inlet pipe flange end of the dual liquid slurry inlet pipe 1. Subsequently, the first slurry inlet pipe 4 and the second slurry inlet pipe 5 are respectively connected to the other two ends of the first tee pipe 3.

[0086] Next, the operator connects the flange end of the dual liquid grout inlet pipe 1 to one end of the grout stop valve 2 using a bolt assembly, and then connects the flange end of the grout injection pipe 6 to the other end of the grout stop valve 2 using a bolt assembly.

[0087] Then, the operator passes the gasket 13 and valve 8 through the grouting pipe 6 in sequence, and connects the gasket 13 and valve 8 to the flange 7 by bolt assembly;

[0088] Finally, the operator passes the sealing ring 14 and the barbed device 9 through the grouting pipe 6 in sequence, and connects the sealing ring 14 and the barbed device 9 to the flange of the valve 8 by means of bolt assembly, thus completing the assembly of the device.

[0089] During the above assembly process, when connecting the flange end of the dual-liquid grout inlet pipe and the flange end of the grout injection pipe to the grout stop valve 2, a rubber gasket can be added for sealing to further ensure the sealing performance.

[0090] When using:

[0091] The operator first assembles valve 8 and barbed device 9 for later use, at which time valve 8 is in the open position;

[0092] Then, the operator drills a hole at a designated location in the surrounding rock using a drilling device, so that the diameter of the hole matches the outer diameter of the fixed pipe 91. The length of the hole is less than the thickness of the surrounding rock, meaning that the hole does not penetrate the surrounding rock. This hole is used to install the barbed device 9.

[0093] Next, the operator surrounds the barbed device 9 with geotextile 12, so that the geotextile 12 is tightly wrapped around the barbed device 9.

[0094] Then, the barbed device 9 is installed inside the surrounding rock hole, so that the assembly consisting of valve 8 and barbed device 9 is firmly connected to the surrounding rock hole;

[0095] Subsequently, the operator drills a hole in the surrounding rock through the fixed pipe 91 using drilling equipment until the surrounding rock is penetrated; at this point, the hole drilled is smaller than the surrounding rock hole through which the barb device 9 is installed.

[0096] Then, after assembling the other components, first put the sealing gasket 13 onto the grouting pipe 6, then pass it through the valve 8 and the fixing pipe 91, and finally connect the sealing gasket 13 and the valve 8 to the flange 7 by bolt assembly, thus completing the installation of the device.

[0097] Next, the operator connected the first grout inlet pipe 4 to the cement grout injection equipment and the second grout inlet pipe 5 to the water glass grout injection equipment.

[0098] Finally, the operator closes valve 8 and grout discharge valve 10, and opens the valves of grout stop valve 2, cement grout injection equipment and water glass injection equipment. The cement grout supplied by the cement grout injection equipment and the water glass supplied by the water glass injection equipment are mixed in the dual-liquid inlet pipe 1 and then injected into the surrounding rock through the grouting pipe 6 until the work of the grouting pipe 6 is completed, so as to achieve the effect of water isolation and rock layer reinforcement, thereby ensuring the smooth progress of tunnel construction.

[0099] After grouting is completed, the operator first closes the stop valve 2, then closes the valves of the cement grouting equipment and the water glass grouting equipment to stop the mixing and injection of the two-component grout. By opening the drain valve 10 in conjunction with closing the stop valve 2, residual grout from the grouting machine to the stop valve 2 can be quickly discharged after grouting, effectively preventing the grout from solidifying inside the pipe, extending the service life of the equipment and reducing cleaning and maintenance work. Preferably, after disassembling the cement grouting equipment and the water glass grouting equipment, the first grout inlet pipe 4 and the second grout inlet pipe 5 can be connected through connecting pipes, and then the pipes can be cleaned by injecting clean water.

[0100] If water gushes into the surrounding rock during the drilling process, the drilling equipment should be removed and valve 8 immediately closed. Then, a drain pipe should be connected to the other end of valve 8 to drain the water inside the surrounding rock before grouting is carried out to further ensure the quality of grouting.

[0101] During the grouting process, the geotextile 12 effectively seals the gap between the fixing pipe 91 and the borehole wall, ensuring the sealing of the borehole opening and thus achieving a reliable anti-leakage effect during the grouting process. At the same time, the barbs 93 of the barb device 9 can better contact the borehole wall, effectively preventing the grouting pipe from being pushed out during high-pressure grouting, ensuring the stability and safety of the grouting operation, and solving the problem of difficult water interception at the borehole opening.

[0102] During the grouting process described above, the first grout inlet pipe 4 is connected to the cement grouting equipment, and the second grout inlet pipe 5 is connected to the water glass grouting equipment. Finally, the grout is mixed in the dual-liquid grout inlet pipe 1, which further enhances the mixing effect of the grout, greatly satisfies the consolidation performance and water-stopping effect of the grout, and enables the grouting quality to be controlled, ensuring the stability of the construction.

[0103] Finally, it should be noted that the concept, specific structure, and technical effects of this utility model have been clearly and completely described above in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections and connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

Claims

1. A tunnel curtain grouting device for use under high water pressure, characterized in that: It includes: Dual-liquid slurry inlet pipe (1); The slurry stop valve (2) is connected to one end of the double liquid slurry inlet pipe (1); The first three-way pipe (3) is connected to the other end of the double liquid inlet pipe (1), and the other two ends of the first three-way pipe (3) are respectively connected to the first inlet pipe (4) and the second inlet pipe (5). Grouting pipe (6) is connected to the other end of grout stop valve (2). A flange (7) is fixedly connected to the grouting pipe (6) near the end of grout stop valve (2). Valve (8), which is detachably mounted on flange (7); The barb device (9) is detachably mounted on the valve (8).

2. The tunnel curtain grouting device according to claim 1, characterized in that: It also includes a slurry discharge valve (10), which is connected to the inlet of the double liquid slurry inlet pipe (1) via a second three-way pipe (11).

3. The tunnel curtain grouting device according to claim 1 or 2, characterized in that: It also includes geotextile (12) placed on the outside of the barbed device (9).

4. The tunnel curtain grouting device according to claim 1, characterized in that: The connection end of the dual liquid slurry inlet pipe (1) and the stop valve (2) is connected to a dual liquid slurry inlet pipe connecting flange; The grouting pipe (6) and the grout stop valve (2) are connected by a grouting pipe connecting flange.

5. The tunnel curtain grouting device according to claim 4, characterized in that: The two ends of the grout stop valve (2) are connected between the double liquid grout inlet pipe connecting flange and the grouting pipe connecting flange by bolt assembly.

6. The tunnel curtain grouting device according to claim 1, characterized in that: The valve (8) is sleeved on the outside of the grouting pipe (6) and connected to the flange (7) by bolt assembly. A sealing gasket (13) is also provided between the valve (8) and the flange (7).

7. The tunnel curtain grouting device according to claim 1, characterized in that: The barb device (9) includes: Fixed tube (91); Fixed pipe flange (92) is connected to one end of fixed pipe (91) and is used to connect to valve (8); The barbs (93) are connected to the outer wall of the fixed tube (91) at equal or unequal intervals.

8. The tunnel curtain grouting device according to claim 7, characterized in that: The inner diameter of the fixed pipe (91) is larger than the outer diameter of the grouting pipe (6); Among them, a sealing ring (14) is provided between the fixed pipe flange (92) and the valve (8).

9. The tunnel curtain grouting device according to claim 8, characterized in that: The opening of the barb (93) is positioned toward the fixed pipe flange (92).

10. The tunnel curtain grouting device according to claim 1, characterized in that: The non-connecting ends of the first grout inlet pipe (4) and the second grout inlet pipe (5) are also provided with connectors for connecting to external grouting equipment.

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