Curtain grouting device for water stopping of water-rich tunnel

Abstract

The invention relates to the technical field of water-rich tunnel engineering, in particular to a curtain grouting device for water stop of a water-rich tunnel, which comprises a flange plate, the flange plate is mounted on a grouting machine through bolts, a plurality of conveying pipes are mounted on one side of the flange plate, and a grouting pipe is mounted at the tail end of the conveying pipe farthest from the flange plate; splicing structures are installed between every two adjacent conveying pipes and between the conveying pipes and the grouting pipes, plugs are installed at the tail ends of the grouting pipes, and annular bags are fixed to the outer sides of the splicing structures at the ends of the grouting pipes through installation structures. By means of the installation structure, the annular bag body is convenient to replace, the front check ring and the rear check ring have a guiding effect on deformation of the annular bag body, the annular bag body can abut against the inner wall of a grouting hole more quickly under the condition that the inflation amount is reduced, the position of the annular bag body can be independently controlled by people through the electric walking wheels so that the grouting area can be changed, and the grouting efficiency can be improved. The practicability and the applicability are better, and the grouting efficiency and the curtain quality can be improved.

Description

Technical Field

[0001] This invention relates to the field of water-rich tunnel engineering technology, specifically to a curtain grouting device for water-rich tunnel water-stopping. Background Technology

[0002] In the curtain grouting construction of water-rich tunnels, traditional grout-stopping techniques are insufficient to meet the precise control requirements of segmented grouting in long holes. Conventional single-hole grouting relies on a single grout-stopping plug, which easily causes grout to flow back along the gaps in the hole wall, resulting in a large waste of grout at the hole opening. Furthermore, the pressure decays rapidly during long-hole grouting, leading to "over-grouting at the near end and under-grouting at the far end," resulting in insufficient filling of deep fissures.

[0003] In segmented grouting operations, existing grout-stopping devices are mostly fixed structures, unable to flexibly adjust the segment positions, and lack an effective control mechanism for sealing pressure. When the grouting pressure exceeds the grout-stopping capacity, it is very easy to cause grout leakage, contaminating non-grouting areas and increasing subsequent cleaning costs. At the same time, they cannot cope with fluctuations in grouting pressure, making it difficult to ensure a continuous tight seal between the grout-stopping device and the borehole wall.

[0004] In addition, in traditional construction, grouting and drilling equipment are separated. After drilling is completed, the drilling equipment needs to be disassembled and the grouting device needs to be installed. The switching process is time-consuming and the grouting accuracy is easily affected by equipment docking deviation.

[0005] The aforementioned problems severely restrict grouting efficiency and curtain quality, necessitating the design of a curtain grouting device for water-rich tunnels. Summary of the Invention

[0006] The purpose of this invention is to provide a curtain grouting device for water-rich tunnels, addressing the aforementioned issues raised in the background art. Traditional grouting techniques struggle to meet the precise control requirements of segmented grouting in long-hole tunnels. Conventional single-hole grouting relies on a single grout plug, leading to grout backflow along the borehole wall, resulting in significant grout waste at the borehole opening. Furthermore, rapid pressure decay during long-hole grouting causes over-grouting at the near end and under-grouting at the far end, resulting in insufficient filling of deep fissures. In segmented grouting operations, existing grouting devices are mostly fixed structures, unable to flexibly adjust segment positions, and lack effective pressure control mechanisms. When grouting pressure exceeds the grouting capacity, cross-contamination of grout can easily occur, contaminating non-grouting areas and increasing subsequent cleaning costs. Simultaneously, they cannot cope with grouting pressure fluctuations, making it difficult to ensure continuous tight contact between the grouting device and the borehole wall. Moreover, traditional construction separates grouting and drilling equipment; after drilling, the drilling equipment must be disassembled and the grouting device reinstalled, a time-consuming switching process that is prone to affecting grouting accuracy due to equipment misalignment.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A curtain grouting device for water-rich tunnel sealing includes: a flange bolted to a grouting machine; multiple delivery pipes installed on one side of the flange; a grouting pipe installed at the end of the delivery pipe furthest from the flange; an assembly structure installed between adjacent delivery pipes and between the delivery pipe and the grouting pipe; a plug installed at the end of the grouting pipe; the outer surfaces of the delivery pipe, assembly structure, grouting pipe, and plug aligned; an annular bladder fixed to the outer side of the assembly structure at the end of the grouting pipe via an installation structure; a pressure pipe connected to the annular bladder; a pressure sensor installed on the pressure pipe; the other end of the pressure pipe connected to a booster pump; the booster pump installed on the grouting machine; and the pressure sensor electrically connected to a PLC controller on the grouting machine. The PLC controller can monitor the hydraulic pressure of the grouting fluid through a probe and can control the pressure provided by the grouting machine and the pressure provided by the booster pump.

[0009] By adopting the above technical solution, the PLC controller can control the pressure value inside the annular bladder and the grouting hydraulic pressure, ensuring that the pressure value inside the annular bladder is more than 1.2 times the grouting hydraulic pressure, thus avoiding the problem of grout leakage from the borehole wall during high-pressure grouting, which would contaminate non-grouting areas and increase subsequent cleaning costs.

[0010] The assembly structure includes an outer ring and an outer ring. Both ends of the conveying pipe and the grouting pipe are fixedly connected to the outer ring. The outer ring is threaded onto the outside of the outer ring. The conveying pipe and the grouting pipe, as well as two adjacent conveying pipes, are spliced ​​together through the threaded engagement between the outer ring and the outer ring. The plug is installed on the outside of the outer ring at the tail end of the grouting pipe through the threaded engagement.

[0011] By adopting the above technical solution, people can adjust the total splicing length of the delivery pipe and the grouting pipe according to the depth of the grouting hole and the grouting position, which improves applicability and practicality.

[0012] The plug includes a sealing disc and an annular groove. The annular groove is formed on the side of the sealing disc near the grouting pipe. The outer ring at the tail end of the grouting pipe is inserted into the annular groove. The outer wall of the inner cavity of the annular groove is threadedly engaged with the outer side of the outer ring.

[0013] By adopting the above technical solution, the end of the grouting pipe is blocked to prevent grout from leaking from the non-grouting end.

[0014] The inner side of the annular bladder is fixedly bonded to the outer side of the outer ring with adhesive, and the adhesive curing structure is the installation structure.

[0015] By adopting the above technical solution, it is convenient to install the annular capsule.

[0016] The mounting structure includes a bearing ring, which is threaded onto the outside of the outer ring, and the inner side of the annular bladder is bonded to the outer side of the bearing ring with adhesive.

[0017] By adopting the above technical solution, it is convenient to replace the annular capsule.

[0018] The annular bladder is movably sleeved on the outside of the bearing ring. The bearing ring is threaded with a front retaining ring and a rear retaining ring, which are located at both ends of the bearing ring, respectively. The annular bladder is located between the front retaining ring and the rear retaining ring.

[0019] By adopting the above technical solution, it is convenient to replace the annular bladder. At the same time, the front and rear retaining rings guide the deformation of the annular bladder, which can make the annular bladder press against the inner wall of the grouting hole more quickly under the condition of reducing the inflation volume.

[0020] The front retaining ring and the rear retaining ring are directly threaded onto the outside of the outer ring.

[0021] By adopting the above technical solution, it is convenient to replace the annular bladder. At the same time, the front and rear retaining rings guide the deformation of the annular bladder, which can make the annular bladder press against the inner wall of the grouting hole more quickly under the condition of reducing the inflation volume.

[0022] The bearing ring is slidably sleeved on the outer side of the outer ring. Four electric walking wheels are installed on the side of the front retaining ring away from the annular bladder. The wheels on the electric walking wheels are covered with anti-slip rubber rings, which abut against the surface of the outer ring. The electric walking wheels are controlled by a PLC controller.

[0023] By adopting the above technical solution, the position of the annular bladder can be controlled individually, so as to change the grouting area, which improves its practicality and applicability.

[0024] A second annular bladder is installed at the other end of the grouting pipe. This annular bladder is fixed to the outer surface of the sealing disc by an installation structure. The two annular bladders are connected by a constant pressure air pipe.

[0025] By adopting the above technical solution, the grouting pipe can be grouted in sections by gradually pulling it out of the grouting hole, or it can be grouted in sections by gradually inserting it into the grouting hole, which makes it more applicable.

[0026] A drilling structure is installed at the end of the grouting pipe away from the delivery pipe. The sealing plate is a hollow ring, and the drilling structure is inserted into the sealing plate.

[0027] Both the conveying pipe and the grouting pipe are equipped with inner conveying pipes. Both ends of the inner conveying pipe have inner connecting rings, with inner rings threaded onto the inner connecting rings. Adjacent inner conveying pipes are connected together via the threaded engagement between the inner connecting rings and the inner rings. The left end of the inner conveying pipe inside the grouting pipe is inserted into an annular groove. The inner wall of the corresponding inner connecting ring is threaded into the inner wall of the annular groove. Three mounting grooves are provided on the inner wall of the inner connecting ring. Mounting arms are movably inserted into the mounting grooves, and the inner rings press the mounting arms into the mounting grooves. A bearing seat is fixedly connected to the end of the mounting arm. A transmission rod is rotatably mounted inside the bearing seat. One end of the transmission rod has a protrusion, and the other end has a groove. Adjacent transmission rods are connected together via the threaded engagement between the protrusion and the groove.

[0028] By adopting the above technical solution, the inner conveying tube and the transmission rod are made coaxial, providing a stable foundation for the rotation of the transmission rod.

[0029] An inner ring is fitted around the outer side of the inner ring. The two ends of the inner ring are respectively connected to the two adjacent end faces of the conveying inner pipes. A pin bar is fixedly connected to the outer side of the inner ring. The other end of the pin bar is connected to the outer ring. The outer ring is slidably inserted into the inner side of the outer ring. The two ends of the outer ring are respectively connected to the two adjacent end faces of the conveying pipes. A grouting channel is formed between the surface of the conveying inner pipe and the inner wall of the conveying pipe.

[0030] By adopting the above technical solution, the conveying pipe and the inner conveying pipe are made coaxial, providing a stable channel for the conveying of slurry.

[0031] An isolation rod is fixedly connected to the flange, and a fixing block is fixedly connected to the end of the isolation rod. A buffer cavity is opened inside the fixing block, and an injection pipe is fixedly connected to the top surface of the fixing block. One end of the injection pipe is connected to the buffer cavity, and the other end of the injection pipe is connected to the grouting port on the grouting machine. Distribution channels are opened on the inner wall of the buffer cavity. A butt joint is connected to the end face of the fixing block away from the flange. The butt joint consists of an outer ring and an inner ring. The annular cavity between the outer ring and the inner ring is connected to the distribution channels.

[0032] By adopting the above technical solution, the injection pipe is connected to the grouting channel, providing a stable channel for the delivery of grout.

[0033] The drilling structure includes an extension rod and a rear auger plate. One end of the extension rod has a protrusion and the other end has a groove. A drill bit is bolted onto the protrusion. A front auger plate is fixedly connected to the outside of the extension rod and inserted into the sealing plate. The rear auger plate is fixedly connected to the surface of the transmission rod inside the grouting pipe. A tapered tube is sleeved on the outside of the front auger plate and fixedly connected to the end face of the sealing plate.

[0034] By adopting the above technical solution, grouting holes can be drilled and the broken soil layer can be pushed outward.

[0035] A transmission rod is inserted inside the fixed block. One end of the transmission rod has a protrusion. The transmission rod is connected to the transmission rod through the cooperation of the protrusion and the groove. A drive motor is bolted to the side of the fixed block. A gear set is driven and connected to the output shaft of the drive motor. A fixed cavity is opened inside the fixed block. The gear set is located inside the fixed cavity and is driven and connected to the transmission rod. A material drop groove is opened on the bottom surface of the fixed block. The material drop groove is connected to the corresponding inner ring.

[0036] By adopting the above technical solution, the drilling and grouting operations can be combined, which saves more time and effort and increases grouting efficiency.

[0037] A protective shell is fitted around the constant pressure air pipe. One end of the protective shell is fixedly connected to the front retaining ring of one end of the grouting pipe, and the other end of the protective shell is fixedly connected to the rear retaining ring of the other end of the grouting pipe.

[0038] By adopting the above technical solution, the constant pressure air tube is shielded and protected, so that the slurry will not contaminate the constant pressure air tube, ensuring that the constant pressure air tube is unobstructed, and at the same time, the two annular bladders can move synchronously.

[0039] The mounting arm has a rhomboid cross-section.

[0040] By adopting the above technical solution, the resistance generated by the installation arm on the movement of soil particles can be reduced, allowing the soil particles to move smoothly inside the inner conveying pipe without accumulating inside the inner conveying pipe.

[0041] A rotary joint is fixedly installed on the end face of the fixed block near the flange. The extension rod, transmission rod, and transmission bar are all hollow. The rotatable end of the rotary joint is connected to the end of the transmission bar. A transfer water channel is opened inside the drill bit, which is connected to the extension rod. A water spray hole is opened on the surface of the drill bit, which is connected to the transfer water channel.

[0042] By adopting the above technical solution, water can be sprayed onto the drilling face to cool it down and protect the drill bit.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] The modular structure allows for adjustment of the total splicing length of the delivery pipe and grouting pipe according to the depth and position of the grouting hole, improving applicability and practicality. A plug prevents grout leakage from non-grouting ends by sealing the grouting pipe end. The installation structure facilitates easy replacement of the annular bladder. Front and rear retaining rings guide the deformation of the annular bladder, allowing it to press against the inner wall of the grouting hole more quickly with reduced inflation. Electric wheels allow for individual control of the annular bladder's position, enabling adjustments to the grouting area. This improved practicality and applicability contributes to increased grouting efficiency and curtain wall quality.

[0045] By using a pressure sensor and probe, the PLC controller can control the pressure value inside the annular bladder and the grouting hydraulic pressure, ensuring that the pressure value inside the annular bladder is more than 1.2 times the grouting hydraulic pressure. This avoids the problem of grout leakage from the borehole wall during high-pressure grouting, which could contaminate non-grouting areas and increase subsequent cleaning costs. This addresses the issue of grouting pressure fluctuations, ensuring a continuous tight fit between the annular bladder and the borehole wall, thus increasing grouting efficiency and curtain quality. The annular bladder design makes this curtain grouting device for water-rich tunnels suitable for gradually pulling the grouting pipe out of the grouting hole and performing segmented grouting, improving the practicality of the curtain grouting device for water-rich tunnels.

[0046] By using two annular bladders, the grouting pipe can be used for grouting in sections by gradually pulling it out of the grouting hole or by gradually inserting it into the grouting hole. This improves its applicability and allows residual grout between the two annular bladders to be moved forward for use in the next grouting section. It also prevents grout from contaminating other areas, thus improving grouting efficiency and curtain quality. Through the drilling structure, this curtain grouting device for water-rich tunnels has both drilling and grouting functions. The drilling and grouting processes can be performed alternately without the need to switch equipment, saving time and labor, and further improving grouting efficiency and curtain quality. Attached Figure Description

[0047] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0048] Figure 2 This is a three-dimensional structural diagram of the fifth embodiment of the present invention;

[0049] Figure 3 This is a three-dimensional structural diagram of the sixth embodiment of the present invention;

[0050] Figure 4 This is a three-dimensional structural diagram of the seventh embodiment of the present invention;

[0051] Figure 5 This is a three-dimensional structural diagram of the eighth embodiment of the present invention;

[0052] Figure 6 This is a three-dimensional structural diagram of the ninth embodiment of the present invention;

[0053] Figure 7 For the present invention Figure 6 A three-dimensional structural diagram of a medium-pressure gas pipe;

[0054] Figure 8 This is a three-dimensional structural schematic diagram of the twelfth embodiment of the present invention;

[0055] Figure 9 For the present invention Figure 8A schematic diagram of the three-dimensional structure cut along the middle plane;

[0056] Figure 10 For the present invention Figure 8 A schematic diagram of the split structure;

[0057] Figure 11 For the present invention Figure 6 A schematic diagram of the disassembled structure of the central conveying pipe;

[0058] Figure 12 For the present invention Figure 6 A three-dimensional structural diagram of the middle flange;

[0059] Figure 13 For the present invention Figure 12 A schematic diagram of the three-dimensional structure cut along the middle plane.

[0060] In the picture:

[0061] 1. Flange; 101. Isolation bar; 102. Fixing block; 103. Buffer chamber; 104. Injection pipe; 105. Distribution channel; 106. Butt joint;

[0062] 2. Conveying pipe; 201. Inner conveying pipe; 202. Mounting groove; 203. Mounting arm; 204. Bearing seat; 205. Transmission rod;

[0063] 3. Assembly structure; 301. Outer ring; 302. Inner ring; 303. Outer ring; 304. Inner ring; 305. Inner ring; 306. Lead bar; 307. Outer ring;

[0064] 4. Grouting pipe;

[0065] 5. Plug; 501. Sealing disc; 502. Annular groove;

[0066] 6. Annular bladder; 601. Bearing ring; 602. Front retaining ring; 603. Rear retaining ring; 604. Electric driving wheel; 605. Constant pressure air tube; 606. Protective shell;

[0067] 7. Air pressure hose;

[0068] 8. Barometric pressure sensor;

[0069] 9. Drilling structure; 901. Extension rod; 902. Drill bit; 903. Front auger plate; 904. Rear auger plate; 905. Converging tube; 906. Transmission rod; 907. Drive motor; 908. Gear set; 909. Fixed chamber; 910. Rotary joint; 911. Transfer waterway; 912. Water spray hole; 913. Material drop chute. Detailed Implementation

[0070] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0071] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0072] like Figures 1-13 As shown, this application provides a curtain grouting device for water-rich tunnel water-stopping, including: a flange 1, the flange 1 is bolted on the grouting machine, a plurality of conveying pipes 2 are installed on one side of the flange 1, a grouting pipe 4 is installed at the tail end of the conveying pipe 2 farthest from the flange 1, an assembly structure 3 is installed between two adjacent conveying pipes 2 and between the conveying pipe 2 and the grouting pipe 4, and a plug 5 is installed at the tail end of the grouting pipe 4.

[0073] For the first embodiment, please refer to... Figure 1 The outer sides of the conveying pipe 2, the assembly structure 3, the grouting pipe 4, and the plug 5 are aligned. An annular bladder 6 is fixed to the outer side of the assembly structure 3 at the end of the grouting pipe 4 through the installation structure. The annular bladder 6 adopts a two-layer rubber composite structure. An air pressure pipe 7 is connected to the annular bladder 6. An air pressure sensor 8 is installed on the air pressure pipe 7. The other end of the air pressure pipe 7 is connected to the booster pump. The booster pump is installed on the grouting machine. The air pressure sensor 8 is electrically connected to the PLC controller on the grouting machine. The PLC controller can monitor the hydraulic pressure of the grouting fluid through the probe. The PLC controller can control the pressure provided by the grouting machine and the pressure provided by the booster pump.

[0074] During operation, the grouting machine inserts the grouting pipe 4 into the grouting hole via the delivery pipe 2. When the grouting pipe 4 reaches the designed depth in the grouting hole, it stops moving. Then, the PLC controller controls the booster pump to operate. The booster pump then fills the annular bladder 6 with high-pressure gas or liquid through the air pressure pipe 7. The annular bladder 6 expands under the pressure difference, and its surface adheres to the inner wall of the grouting hole. Next, the PLC controller controls the grouting machine to operate, and the grout enters the grouting pipe 4 through the delivery pipe 2. Grouting pipe 4 injects grout into the grouting hole. Under pressure, the grout enters the formation along the gaps in the hole wall, achieving the purpose of grouting. At the same time, the PLC controller detects the internal pressure of the annular bladder 6 in real time through the air pressure sensor 8 and monitors the grouting pressure in real time through the probe. Then, the PLC controller dynamically balances the pressure value inside the annular bladder 6 to be more than 1.2 times the grouting pressure, avoiding the problem of grout leakage from the hole wall during high-pressure grouting, which would contaminate non-grouting areas and increase subsequent cleaning costs.

[0075] The setting of an annular bladder 6 is suitable for gradually pulling the grouting pipe 4 out of the grouting hole and grouting in sections.

[0076] Second embodiment, please refer to Figure 10 and Figure 11 The assembly structure 3 includes an outer ring 301 and an outer ring 303. Both ends of the conveying pipe 2 and both ends of the grouting pipe 4 are fixedly connected to the outer ring 301. The outer ring 303 is threaded onto the outside of the outer ring 301. The conveying pipe 2 and the grouting pipe 4, as well as two adjacent conveying pipes 2, are spliced ​​together by the threaded engagement between the outer ring 301 and the outer ring 303. The plug 5 is installed on the outside of the outer ring 301 at the tail end of the grouting pipe 4 by the threaded engagement.

[0077] During assembly, the outer ring 303 is first installed on the outer ring 301 on one of the conveying pipes 2, and then the outer ring 301 on another conveying pipe 2 is installed in this outer ring 303. This assembly allows people to adjust the total splicing length of the conveying pipe 2 and the grouting pipe 4 according to the depth of the grouting hole and the grouting position, which improves applicability and practicality.

[0078] Third embodiment, please refer to Figure 9 The plug 5 includes a sealing disc 501 and an annular groove 502. The annular groove 502 is formed on the side of the sealing disc 501 near the grouting pipe 4. The outer ring 301 at the tail end of the grouting pipe 4 is inserted into the annular groove 502. The outer wall of the inner cavity of the annular groove 502 is threadedly engaged with the outer side of the outer ring 301.

[0079] For the fourth embodiment, please refer to [link / reference]. Figure 2 The inner side of the annular bladder 6 is fixedly bonded to the outer side of the outer ring 303 with glue, and the glue curing structure is the installation structure.

[0080] For the fifth embodiment, please refer to... Figure 2 The installation structure includes a bearing ring 601, which is threaded onto the outside of the outer ring 303. The inner side of the annular bladder 6 is bonded to the outer side of the bearing ring 601 with adhesive.

[0081] When replacing, the entire assembly consisting of the bearing ring 601 and the annular bladder 6 is disassembled and replaced.

[0082] For the sixth embodiment, please refer to... Figure 3 The annular bladder 6 is movably sleeved on the outside of the bearing ring 601. The bearing ring 601 is threaded with a front retaining ring 602 and a rear retaining ring 603. The front retaining ring 602 and the rear retaining ring 603 are located at both ends of the bearing ring 601, and the annular bladder 6 is located between the front retaining ring 602 and the rear retaining ring 603.

[0083] When replacing, simply remove either the front retaining ring 602 or the rear retaining ring 603 to remove and replace the annular bladder 6.

[0084] For the seventh embodiment, please refer to... Figure 5 The front retaining ring 602 and the rear retaining ring 603 are directly threaded onto the outside of the outer ring 303.

[0085] When replacing, simply remove either the front retaining ring 602 or the rear retaining ring 603 to remove and replace the annular bladder 6.

[0086] Eighth embodiment, please refer to Figure 5 The bearing ring 601 is slidably sleeved on the outer side of the outer ring 303. The front retaining ring 602 is equipped with four electric walking wheels 604 on the side away from the annular bladder 6. The wheels on the electric walking wheels 604 are covered with anti-slip rubber rings, which abut against the surface of the outer ring 303. The electric walking wheels 604 are controlled by a PLC controller.

[0087] During operation, the PLC controller controls the electric walking wheel 604 to move deeper into the grouting hole. Then, the electric walking wheel 604 carries the annular bladder 6 deeper into the grouting hole through the bearing ring 601 to change the grouting area.

[0088] Ninth embodiment, please refer to Figure 6 The other end of the grouting pipe 4 is equipped with a second annular bladder 6, which is fixed to the outer surface of the sealing disc 501 by an installation structure. The two annular bladders 6 are connected by a constant pressure air pipe 605.

[0089] When grouting is carried out in stages by gradually pulling out the grouting hole, the grouting pipe 4 is first inserted into the deepest part of the grouting hole. Then, the annular bladder 6 is expanded until an independent chamber is formed between the two annular bladders 6. Grouting then begins. The PLC controller determines the grouting end by stabilizing the pressure for three minutes without any pressure drop, based on the pressure curve. The internal air pressure of the annular bladder 6 is then reduced, but the annular bladder 6 is still lightly pressed against the inner wall of the grouting hole. Next, the grouting pipe 4 is moved out of the grouting hole. Then, the annular bladder 6 at the end of the grouting pipe 4 pushes the grout remaining between the two annular bladders 6 forward, so that it can be used for the next grouting section. The annular bladder 6 at the front end of the grouting pipe 4 is used to block the grout, so that the grout will not contaminate other areas.

[0090] When grouting is performed by gradually inserting the grouting pipe 4 into the opening of the grouting hole, the annular bladder 6 is first inserted into the opening of the grouting hole. Then, the annular bladder 6 is expanded until an independent chamber is formed between the two annular bladder 6. Grouting then begins. The PLC controller determines the pressure curve and stops the grouting after three minutes of pressure stabilization without any attenuation. The internal air pressure of the annular bladder 6 is then reduced, but the annular bladder 6 is still lightly pressed against the inner wall of the grouting hole. Next, the grouting pipe 4 is moved deeper into the grouting hole. Then, the annular bladder 6 at the front end of the grouting pipe 4 pushes the grout remaining between the two annular bladder 6 forward, so that it can be used for the next grouting section. The annular bladder 6 at the tail end of the grouting pipe 4 is used to block the grout, so that the grout will not contaminate other areas.

[0091] In the tenth embodiment, a drilling structure 9 is installed at the end of the grouting pipe 4 away from the delivery pipe 2, and the sealing plate 501 is a hollow ring, with the drilling structure 9 inserted in the sealing plate 501.

[0092] Eleventh embodiment, please refer to Figure 9 , Figure 10 and Figure 11 Both the conveying pipe 2 and the grouting pipe 4 are equipped with inner conveying pipes 201. Both ends of the inner conveying pipe 201 have inner connecting rings 302, with inner rings 304 threadedly fitted inside the inner connecting rings 302. Adjacent inner conveying pipes 201 are connected together via the threaded engagement between the inner connecting rings 302 and the inner rings 304. The left end of the inner conveying pipe 201 inside the grouting pipe 4 is inserted into an annular groove 502, and the inner wall of the corresponding inner connecting ring 302 is threadedly engaged with the inner wall of the annular groove 502. The inner wall of the connecting ring 302 has three mounting grooves 202. The mounting arm 203 is movably inserted into the mounting groove 202. The inner ring 304 presses the mounting arm 203 into the mounting groove 202. The end of the mounting arm 203 is fixedly connected to the bearing seat 204. The transmission rod 205 is rotatably installed inside the bearing seat 204. One end of the transmission rod 205 has a protrusion and the other end has a groove. Two adjacent transmission rods 205 are installed together by the threaded engagement of the protrusion and the groove.

[0093] An inner ring 305 is fitted around the inner ring 304. The two ends of the inner ring 305 are respectively in contact with the two adjacent end faces of the conveying inner pipe 201. A lead strip 306 is fixedly connected to the outer side of the inner ring 305. The other end of the lead strip 306 is connected to an outer ring 307. The outer ring 307 is slidably inserted into the inner side of the outer ring 303. The two ends of the outer ring 307 are respectively in contact with the two adjacent end faces of the conveying pipe 2. A grouting channel is formed between the surface of the conveying inner pipe 201 and the inner wall of the conveying pipe 2.

[0094] Please see Figure 12 and Figure 13 An isolation rod 101 is fixedly connected to the flange 1. A fixing block 102 is fixedly connected to the end of the isolation rod 101. A buffer cavity 103 is opened inside the fixing block 102. An injection pipe 104 is fixedly connected to the top surface of the fixing block 102. One end of the injection pipe 104 is connected to the buffer cavity 103, and the other end of the injection pipe 104 is connected to the grouting port on the grouting machine. A distribution channel 105 is opened on the inner wall of the buffer cavity 103. A butt joint 106 is connected to the end face of the fixing block 102 away from the flange 1. The butt joint 106 is composed of an outer ring 303 and an inner ring 304. The annular cavity between the outer ring 303 and the inner ring 304 is connected to the distribution channel 105.

[0095] During grouting, the grout, driven by the grouting machine, enters the grouting pipe 4 through the injection pipe 104, buffer chamber 103, distribution channel 105, the annular groove inside the connector 106, the grouting channel between the inner conveying pipe 201 and the conveying pipe 2, and the grouting pipe 4 injects the grout into the grouting hole to achieve grouting.

[0096] Please see Figure 9 The drilling structure 9 includes an extension rod 901 and a rear auger plate 904. One end of the extension rod 901 has a protrusion and the other end has a groove. A drill bit 902 is bolted onto the protrusion. A front auger plate 903 is fixedly connected to the outside of the extension rod 901. The front auger plate 903 is inserted into the sealing disc 501. The rear auger plate 904 is fixedly connected to the surface of the transmission rod 205 inside the grouting pipe 4. A tapered tube 905 is sleeved on the outside of the front auger plate 903. The tapered tube 905 is fixedly connected to the end face of the sealing disc 501.

[0097] During operation, the rotating drill bit 902 drills holes and breaks up the strata. Then, the grouting pipe 4 moves forward with the tapered pipe 905 through the plug 5. The strata particles then enter the tapered pipe 905, which delivers them to the vicinity of the front auger plate 903. The rotating front auger plate 903 and rear auger plate 904 then push the strata particles outward along the inner cavity of the conveying inner pipe 201, thus achieving the slag discharge function.

[0098] Please see Figure 13A transmission rod 906 is inserted inside the fixing block 102. One end of the transmission rod 906 has a protrusion. The transmission rod 906 is connected to the transmission rod 205 through the cooperation of the protrusion and the groove. A drive motor 907 is bolted to the side of the fixing block 102. The drive motor 907 is controlled by a PLC controller. A gear set 908 is driven and connected to the output shaft of the drive motor 907. A fixing chamber 909 is opened inside the fixing block 102. The gear set 908 is located inside the fixing chamber 909 and is driven and connected to the transmission rod 906. A material drop groove 913 is opened on the bottom surface of the fixing block 102. The material drop groove 913 is connected to the corresponding inner ring 304.

[0099] During operation, the drive motor 907 drives the transmission rod 906 to rotate via the gear set 908. Then, the transmission rod 906 drives the transmission rod 205 to rotate. Next, the transmission rod 205 drives the extension rod 901, drill bit 902, front auger plate 903, and rear auger plate 904 to rotate. After that, the discharged slag particles are discharged through the discharge chute 913.

[0100] For the twelfth embodiment, please refer to... Figure 8 A protective shell 606 is fitted on the outside of the constant pressure air pipe 605. One end of the protective shell 606 is fixedly connected to the front retaining ring 602 at one end of the grouting pipe 4, and the other end of the protective shell 606 is fixedly connected to the rear retaining ring 603 at the other end of the grouting pipe 4. There are multiple protective shells 606.

[0101] For the thirteenth embodiment, please refer to... Figure 11 The cross-section of mounting arm 203 is rhomboid.

[0102] The fourteenth embodiment, please refer to Figure 9 , Figure 13 A rotary joint 910 is fixedly installed on the end face of the fixed block 102 near the flange 1. The extension rod 901, transmission rod 205, and transmission bar 906 are all hollow. The rotatable end of the rotary joint 910 is connected to the end of the transmission bar 906. A transfer water channel 911 is opened inside the drill bit 902, which is connected to the extension rod 901. A water spray hole 912 is opened on the surface of the drill bit 902, which is connected to the transfer water channel 911.

[0103] During operation, the water pump on the grouting machine drives cooling water to spray onto the drilling face through the rotary joint 910, transmission rod 906, transmission rod 205, extension rod 901, transfer water channel 911, and water spray hole 912 for cooling and to protect the drill bit 902.

[0104] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0105] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A curtain grouting device for water-rich tunnel sealing, comprising: A flange (1) is bolted to a grouting machine. Multiple conveying pipes (2) are installed on one side of the flange (1). A grouting pipe (4) is installed at the tail end of the conveying pipe (2) furthest from the flange (1). An assembly structure (3) is installed between two adjacent conveying pipes (2) and between the conveying pipe (2) and the grouting pipe (4). A plug (5) is installed at the tail end of the grouting pipe (4). The outer surfaces of the conveying pipe (2), the assembly structure (3), the grouting pipe (4), and the plug (5) are aligned. An annular bladder (6) is fixed to the outside of the assembly structure (3) at the end of the grouting pipe (4) by an installation structure. An air pressure pipe (7) is connected to the annular bladder (6). An air pressure sensor (8) is installed on the air pressure pipe (7). The other end of the air pressure pipe (7) is connected to a booster pump. The booster pump is installed on the grouting machine. The air pressure sensor (8) is electrically connected to the PLC controller on the grouting machine. The PLC controller can monitor the hydraulic pressure of the grouting fluid through a probe. The PLC controller can control the pressure provided by the grouting machine and the pressure provided by the booster pump. The assembly structure (3) includes an outer ring (301) and an outer ring (303). The outer ring (301) is fixedly connected to both ends of the conveying pipe (2) and both ends of the grouting pipe (4). The outer ring (303) is threaded onto the outside of the outer ring (301). The conveying pipe (2) and the grouting pipe (4) and two adjacent conveying pipes (2) are spliced ​​together by the threaded engagement between the outer ring (301) and the outer ring (303). The plug (5) is installed outside the outer ring (301) at the tail end of the grouting pipe (4) by the threaded engagement. The plug (5) includes a sealing disc (501) and an annular groove (502). The annular groove (502) is formed on the side of the sealing disc (501) near the grouting pipe (4). The outer ring (301) at the tail end of the grouting pipe (4) is inserted into the annular groove (502). The outer wall of the inner cavity of the annular groove (502) is threadedly engaged with the outer side of the outer ring (301).

2. The curtain grouting device for water-rich tunnel water-stopping according to claim 1, characterized in that, The inner side of the annular bladder (6) is fixedly bonded to the outer side of the outer ring (303) by adhesive, and the adhesive curing structure is the installation structure.

3. The curtain grouting device for water-rich tunnel water-stopping according to claim 1, characterized in that, The mounting structure includes a support ring (601), which is threaded onto the outside of the outer ring (303), and the inner side of the annular bladder (6) is bonded to the outer side of the support ring (601) with adhesive.

4. A curtain grouting device for water-rich tunnel water-stopping according to claim 3, characterized in that, The annular bladder (6) is movably sleeved on the outside of the bearing ring (601). The bearing ring (601) is threaded with a front retaining ring (602) and a rear retaining ring (603). The front retaining ring (602) and the rear retaining ring (603) are located at both ends of the bearing ring (601), and the annular bladder (6) is located between the front retaining ring (602) and the rear retaining ring (603).

5. A curtain grouting device for water-rich tunnel water-stopping according to claim 4, characterized in that, The front retaining ring (602) and the rear retaining ring (603) are directly threaded onto the outside of the outer ring (303).

6. A curtain grouting device for water-rich tunnel water-stopping according to claim 4, characterized in that, The bearing ring (601) is slidably sleeved on the outer side of the outer ring (303). Four electric walking wheels (604) are installed on the side of the front retaining ring (602) away from the annular bladder (6). The wheels of the electric walking wheels (604) are covered with anti-slip rubber rings, which abut against the surface of the outer ring (303). The electric walking wheels (604) are controlled by the PLC controller.

7. A curtain grouting device for water-rich tunnel water-stopping according to any one of claims 2-6, characterized in that, The other end of the grouting pipe (4) is equipped with a second annular bladder (6), which is fixed to the outer surface of the sealing disc (501) by the mounting structure. The two annular bladders (6) are connected by a constant pressure air pipe (605). The grouting pipe (4) is equipped with a drilling structure (9) at one end away from the delivery pipe (2), and the sealing plate (501) is a hollow ring, with the drilling structure (9) inserted in the sealing plate (501); Both the conveying pipe (2) and the grouting pipe (4) are equipped with inner conveying pipes (201). Both ends of the inner conveying pipe (201) are provided with inner connecting rings (302). An inner ring (304) is threaded into the inner connecting ring (302). Two adjacent inner conveying pipes (201) are connected together by the threaded engagement between the inner connecting ring (302) and the inner ring (304). The left end of the inner conveying pipe (201) inside the grouting pipe (4) is inserted into the annular groove (502). The inner wall of the corresponding inner connecting ring (302) is aligned with the inner wall of the annular groove (502). The inner ring (302) has three mounting grooves (202) on its inner wall. A mounting arm (203) is movably inserted into the mounting groove (202). The inner ring (304) presses the mounting arm (203) into the mounting groove (202). A bearing seat (204) is fixedly connected to the end of the mounting arm (203). A transmission rod (205) is rotatably installed inside the bearing seat (204). One end of the transmission rod (205) has a protrusion and the other end has a groove. Two adjacent transmission rods (205) are installed together by the threaded engagement of the protrusion and the groove. An inner ring (305) is sleeved on the outside of the inner ring (304). The two ends of the inner ring (305) are respectively connected to the two end faces of two adjacent inner conveying pipes (201) that are close to each other. A pin strip (306) is fixedly connected to the outer side of the inner ring (305). The other end of the pin strip (306) is connected to an outer ring (307). The outer ring (307) is slidably inserted into the inner side of the outer ring (303). The two ends of the outer ring (307) are respectively connected to the two end faces of two adjacent conveying pipes (2) that are close to each other. A grouting channel is formed between the surface of the inner conveying pipe (201) and the inner wall of the conveying pipe (2). An isolation rod (101) is fixedly connected to the flange (1). A fixing block (102) is fixedly connected to the end of the isolation rod (101). A buffer cavity (103) is opened inside the fixing block (102). An injection pipe (104) is fixedly connected to the top surface of the fixing block (102). One end of the injection pipe (104) is connected to the buffer cavity (103), and the other end of the injection pipe (104) is connected to the grouting port on the grouting machine. A distribution channel (105) is opened on the inner wall of the buffer cavity (103). A connector (106) is connected to the end face of the fixing block (102) away from the flange (1). The connector (106) is composed of an outer ring (303) and an inner ring (304). The annular cavity between the outer ring (303) and the inner ring (304) is connected to the distribution channel (105). The drilling structure (9) includes an extension rod (901) and a rear auger plate (904). One end of the extension rod (901) has a protrusion and the other end has a groove. A drill bit (902) is bolted onto the protrusion. A front auger plate (903) is fixedly connected to the outside of the extension rod (901). The front auger plate (903) is inserted into the sealing disc (501). The rear auger plate (904) is fixedly connected to the surface of the transmission rod (205) inside the grouting pipe (4). A tapered tube (905) is sleeved on the outside of the front auger plate (903). The tapered tube (905) is fixedly connected to the end face of the sealing disc (501). A transmission rod (906) is inserted inside the fixed block (102). One end of the transmission rod (906) has a protrusion. The transmission rod (906) is connected to the transmission rod (205) through the cooperation of the protrusion and the groove. A drive motor (907) is bolted to the side of the fixed block (102). A gear set (908) is driven and connected to the output shaft of the drive motor (907). A fixed chamber (909) is opened inside the fixed block (102). The gear set (908) is located inside the fixed chamber (909). The gear set (908) is driven and connected to the transmission rod (906). A material drop groove (913) is opened on the bottom surface of the fixed block (102). The material drop groove (913) is connected to the corresponding inner ring (304).

8. A curtain grouting device for water-rich tunnel water-stopping according to claim 7, characterized in that, The constant pressure air pipe (605) is fitted with a protective shell (606) on the outside. One end of the protective shell (606) is fixedly connected to the front retaining ring (602) of one end of the grouting pipe (4), and the other end of the protective shell (606) is fixedly connected to the rear retaining ring (603) of the other end of the grouting pipe (4).

9. A curtain grouting device for water-rich tunnel water-stopping according to claim 7, characterized in that, The mounting arm (203) has a rhomboid cross-section.

10. A curtain grouting device for water-rich tunnel water-stopping according to claim 7, characterized in that, A rotary joint (910) is fixedly installed on the end face of the fixed block (102) near the flange (1). The extension rod (901), transmission rod (205), and transmission rod (906) are all hollow. The rotatable end of the rotary joint (910) is connected to the end of the transmission rod (906). A transfer water channel (911) is opened inside the drill bit (902), and the transfer water channel (911) is connected to the extension rod (901). A water spray hole (912) is opened on the surface of the drill bit (902), and the water spray hole (912) is connected to the transfer water channel (911).

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