Tunnel grouting device and full-section deep hole pre-grouting method

Abstract

The invention discloses a tunnel grouting device and a full-section deep hole pre-grouting method. The tunnel grouting device comprises a mounting seat, grouting pipes; the sealing assembly comprises a sealing plug arranged in the grouting pipe in a sliding mode and a branch pipe arranged at one end of the sealing plug, one end of the branch pipe extends out of the open end of the grouting pipe, the extending end of the branch pipe is erected on the mounting base, and the other end of the branch pipe communicates with the grouting section; the thickness of the sealing plug is larger than the diameter of a grout outlet in the grouting pipe. And the slurry storage assembly communicates with the end, away from the sealing plug, of the branch pipe so as to press the grouting liquid into the grouting pipe. The grouting device has the beneficial effects that when the grouting pipe retreats, the situation that the grouting pipe retreats to the position, located outside the grouting hole, of the grouting pipe to continuously jet grouting liquid is avoided as much as possible, the construction environment is improved, and the situation that existing grouting liquid is wasted is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel grouting, and more specifically to a tunnel grouting device and a full-section deep hole pre-grouting method. Background Art

[0002] In water-rich strata, tunnel excavation often faces the situation of sudden water inrush. In order to avoid this situation as much as possible, construction workers usually use full-section curtain pre-grouting to pre-reinforce the rock and soil layer in front of the excavated tunnel to facilitate the smooth excavation of subsequent tunnels. When using the full-section curtain pre-grouting method to pre-reinforce the excavated rock and soil layer, grouting holes are often drilled on the heading face first, and then grouting pipes are installed in the grouting holes. Grouting liquid is introduced into the grouting pipes by a grouting machine. The grouting liquid flows out through the small holes on the grouting pipes and enters the rock and soil layer to reinforce the gaps in the rock and soil layer. In the prior art, the grouting pipe is taken out after the grouting is completed, but the volume of the grouting pipe itself will cause gaps in the grouting liquid inside the grouting hole. In order to avoid the above situation, backward grouting is often used in the prior art, that is, the grouting pipe is gradually retreated, such as a tunnel grouting device disclosed in the patent with application number 202010704065.X, which is provided with a grouting pipe, a driving gear, a gear plate, and a first motor. During the grouting process, the grouting pipe can be gradually retracted by the driving gear control to avoid the volume of the grouting pipe itself causing gaps in the cement slurry inside the pre-drilled hole after the grouting pipe is withdrawn. However, in the above design, since the grouting pipe itself has many slurry outlet holes arranged along its axial direction, the grouting pipe located outside after being separated from the grouting hole, while the grouting liquid is continuously passed through, the slurry outlet holes thereon are also continuously discharging slurry, which is not only easy to form splashing, affecting the operating environment and operators, but also causing waste of grouting liquid.

[0003] Therefore, a new type of grouting equipment is urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0004] An object of the present invention is to solve at least the above-mentioned problems and to provide a tunnel grouting device which can avoid continuously spraying grouting liquid to the outlet holes on the grouting pipe outside the grouting hole when the grouting pipe is retracted, thereby improving the construction environment and avoiding the existing waste of grouting liquid.

[0005] In order to achieve these purposes and other advantages according to the present invention, there is provided a tunnel grouting device, comprising:

[0006] Mounting seat;

[0007] A grouting pipe, which is arranged above the mounting seat;

[0008] A sealing assembly, which includes a sealing plug and a branch pipe slidably arranged in the grouting pipe. The sealing plug divides the grouting pipe into a grouting section and an installation section. The installation section is the grouting pipe between the sealing plug and the open end of the grouting pipe. One end of the branch pipe penetrates through the sealing plug and communicates with the grouting section, and the other end is erected on the mounting seat. The thickness of the sealing plug is greater than the diameter of the slurry outlet hole on the grouting pipe;

[0009] A slurry storage assembly, which communicates with the end of the branch pipe away from the sealing plug to press the grouting liquid into the grouting pipe;

[0010] A first driving member, which drives the grouting pipe to move along the branch pipe.

[0011] Preferably, it further includes a cleaning ring and a water supply assembly. The cleaning ring is erected on the mounting seat. The cleaning ring is coaxially sleeved on the grouting pipe, and the inside of the cleaning ring is hollow. A plurality of water outlet spray holes are arranged on the side wall of the cleaning ring close to the grouting pipe; the water supply assembly communicates with the plurality of water outlet spray holes to make the plurality of water outlet spray holes spray water towards the outer wall of the grouting pipe.

[0012] Preferably, it further includes a brush assembly. The brush assembly includes a mounting pipe coaxially fixed on the branch pipe. The mounting pipe is provided with bristles, and the mounting pipe is located in the installation section; wherein, the cleaning ring is located on the side of the brush assembly close to the open end of the grouting pipe.

[0013] Preferably, the sealing plug includes a mounting block coaxially fixed on the branch pipe and a rubber layer sleeved on the mounting block.

[0014] Preferably, the rubber layer is a hollow annular layer. The inner ring of the annular layer is fixed on the mounting block, and the annular layer is provided with a first inflation port.

[0015] Preferably, the mounting pipe is coaxially provided with an annular elastic cavity. The outer wall of the elastic cavity is provided with the bristles, and the elastic cavity is provided with a second inflation port.

[0016] Preferably, both the first inflation port and the second inflation port are connected with an extraction hose, and a sealing cap is provided at the free end of the extraction hose.

[0017] Preferably, the branch pipe includes a first pipe, a second pipe and a connecting pipe. The mounting pipe and the sealing plug are both arranged on the first pipe. The diameter of the first pipe is smaller than the inner diameter of the grouting pipe. The diameter of the second pipe is slightly smaller than the inner diameter of the grouting pipe. One end of the connecting pipe is detachably connected to the first pipe, and the other end is detachably connected to the second pipe.

[0018] Preferably, it further includes a vehicle body, the mounting seat is arranged above the vehicle body, and an angle adjusting mechanism is connected between the mounting seat and the vehicle body to adjust the angle of the mounting seat; the mounting seat includes a first seat and a second seat arranged in sequence from top to bottom, a lifting mechanism is arranged between the first seat and the second seat, and the second seat is connected to the angle connection mechanism.

[0019] Full-section deep-hole pre-grouting method, using the tunnel grouting device for pre-grouting construction, specifically including the following steps:

[0020] S1. Drill grouting holes on the heading face to be constructed; among them, the distribution of the grouting holes is: 22 first grouting holes are drilled at 0.5 m along the excavation boundary, and 24 second grouting holes are drilled at 1.0 m away from the excavation boundary; the outward inclination angle of the first grouting holes is 9.2 - 9.4 degrees, and the outward inclination angle of the second grouting holes is 9.6 - 9.8 degrees;

[0021] S2. Start the vehicle body, move the tunnel grouting device to be close to the first grouting hole, then start the lifting mechanism and the angle adjusting mechanism to make the angle of the grouting pipe adapt to the first grouting hole. At this time, the sealing plug is located close to the first grouting hole, and then start the first driving member to drive the grouting pipe into the first grouting hole; start the slurry storage assembly to press the grouting liquid into the grouting pipe; when the grouting is completed, start the first driving member again to drive the grouting pipe to move along the branch pipe until the grouting pipe disengages from the first grouting hole. During this process, the grouting pipe where the grouting section is located continues to grout the first grouting hole;

[0022] S3. After all the first grouting holes are grouted, after an interval of 2 - 3 hours, grout the second grouting holes according to step S2.

[0023] The present invention has at least the following beneficial effects:

[0024] By designing the mounting seat, grouting pipe, sealing plug, branch pipe, slurry storage assembly, and first driving member, when the grouting is completed, start the first driving member to drive the grouting pipe to retreat along the grouting hole. At this time, the grouting section of the grouting pipe still grouts the grouting hole, and during the retreat process of the grouting pipe, the inner wall of the grouting pipe slides past the sealing plug in sequence, and the sealing plug guides all the grouting liquid into the grouting section. Therefore, the slurry outlet holes on the retreated grouting pipe will no longer spray grouting liquid, thereby improving the construction environment and avoiding the waste of existing grouting liquid.

[0025] Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0026] Figure 1Structural schematic diagram of the tunnel grouting device according to one of the technical solutions of the present invention;

[0027] Figure 2 is Figure 1 Enlarged structural diagram at A in;

[0028] Figure 3 Structural schematic diagram of the cleaning ring according to one of the technical solutions of the present invention.

[0029] Reference numerals: 1 - vehicle body; 2 - bottom column; 3 - first mounting table; 4 - second mounting table; 5 - first seat; 6 - second seat; 7 - feeding and stirring tank; 8 - water storage tank; 9 - first power pump; 10 - second power pump; 11 - support column; 12 - branch pipe, 1201 - first pipe; 1202 - connecting pipe; 1203 - second pipe; 13 - support rod; 14 - vertical rod; 15 - cleaning ring; 16 - grouting pipe; 17 - mounting block; 18 - rubber layer; 19 - brush bristles; 20 - mounting pipe; 21 - elastic cavity; 22 - leading hose; 23 - water outlet spray hole; 24 - clamping member; 25 - base; 26 - grouting hole. Detailed implementation manners

[0030] The following further describes the present invention in detail with reference to embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0031] It should be understood that terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0032] As Figures 1-3 shown, the present invention provides a tunnel grouting device, including:

[0033] Mounting seat;

[0034] Grouting pipe 16, which is arranged above the mounting seat;

[0035] Sealing assembly, which includes a sealing plug slidably arranged in the grouting pipe 16 and a branch pipe 12. The sealing plug divides the grouting pipe 16 into a grouting section and an installation section. The installation section is the grouting pipe 16 between the sealing plug and the open end of the grouting pipe. One end of the branch pipe 12 penetrates through the sealing plug and communicates with the grouting section, and the other end is erected on the mounting seat. The thickness of the sealing plug is greater than the diameter of the slurry outlet hole on the grouting pipe 16;

[0036] Slurry storage assembly, which communicates with the end of the branch pipe 12 away from the sealing plug to press the grouting liquid into the grouting pipe 16;

[0037] First driving member, which drives the grouting pipe 16 to move along the branch pipe 12;

[0038] In the above technical solution, the mounting base is horizontally arranged, and a vertical support column 11 is provided on the mounting base. One end of the branch pipe 12 is arranged on the support column 11, and a sealing plug is provided at the other end of the branch pipe 12. The sealing plug is coaxially arranged in the grouting pipe 16 to achieve a sliding sealing connection between the grouting pipe 16 and the sealing plug. The grouting pipe 16 is an existing grouting pipe 16 (the existing grouting pipe 16 is usually a pipe body with one end open and the other end pointed, and multiple rows of slurry outlet hole groups are provided on the pipe body. Each row of slurry outlet hole groups includes multiple slurry outlet holes arranged along the axial direction of the pipe body). The sealing plug divides the grouting pipe 16 into two sections. The grouting pipe 16 on the side where the branch pipe 12 is provided with the sealing plug is the installation section, and the other section is the grouting section. The axial length of the sealing plug is greater than the diameter of the slurry outlet holes on the grouting pipe 16, so as to ensure the partition effect between the installation section and the grouting section and prevent the grouting liquid in the grouting section from moving into the installation section. A perforation is provided on the sealing plug, and the branch pipe 12 is coaxially and hermetically fixed on the perforation to communicate the branch pipe 12 with the grouting section.

[0039] The slurry storage assembly includes a feeding and stirring tank 7 and a first power pump 9. A feeding port is provided on the feeding and stirring tank 7 to add grouting liquid into the feeding and stirring tank 7. A stirring shaft is provided in the feeding and stirring tank 7 to stir the grouting liquid (the stirring shaft is driven to rotate by a motor, and the above structure is very mature and not shown in the drawings). A discharge port is provided on the feeding and stirring tank 7, and the discharge port is connected to the inlet of the first power pump 9 through a hose. The outlet of the first power pump 9 is connected to the end of the branch pipe 12 far from the sealing plug through a hose, so that when the first power pump 9 is started, the grouting liquid in the feeding and stirring tank 7 is introduced into the branch pipe 12 and finally pressed into the grouting pipe 16.

[0040] The first driving member is used to drive the grouting pipe 16 to move. The first driving member is a common structure in the art. For example, the first driving member includes a base 25 slidably arranged on the mounting base, a clamping member 24 arranged on the base 25, and a power member. The clamping member 24 is used to clamp the pipe body of the grouting pipe 16 near its open end. The structure of the clamping member 24 is also a common structure. For example, it can be a clamp or a pair of clamping plates driven to move relative to each other by a cylinder. The power member can be a hydraulic rod (the telescopic end of the hydraulic rod is fixedly connected to the base 25, and the fixed end is arranged on the mounting base to pull the mounting base to move). The length of the branch pipe 12 and the initial position of the sealing plug are designed according to the actual situation. The basic design principle is that when the grouting section of the grouting pipe 16 is inserted into the corresponding grouting hole 26, the sealing plug is located near the open end of the grouting pipe 16 and near the grouting hole 26 on the heading face. When the grouting pipe 16 completely withdraws from the grouting hole 26, the sealing plug is located near the tip of the grouting pipe 16. It should be noted that the drawings of the present invention are all schematic diagrams of principles.

[0041] In this technical solution, during use, initially, the sealing plug is inserted into the grouting pipe 16, and then the clamping member 24 clamps the grouting pipe 16. The power member drives the grouting pipe 16 to move, so that the grouting pipe 16 enters the grouting hole 26 (the sealing plug is located at a position close to the grouting hole 26); when the grouting pipe 16 needs to be retracted, the power member is started again to drive the grouting pipe 16 to retract. During the retraction of the grouting pipe 16, the grouting pipe 16 moves along the branch pipe 12 (relative sliding occurs between the sealing plug and the grouting pipe 16). Due to the action of the sealing plug and the branch pipe 12, the grouting liquid only leads to the grouting section. Therefore, during the retraction of the grouting pipe 16, no grouting liquid flows out (the pipe body of the grouting pipe 16 between the sealing plug and the grouting hole 26 is short, and this influence can be ignored, or the sealing plug is pre-installed at the corresponding position of the grouting pipe 16 so that there is no slurry outlet hole on the pipe body between the sealing plug and the grouting hole 26 after the grouting pipe 16 enters the grouting hole 26);

[0042] Adopting this technical solution, the beneficial effect obtained is that by designing the mounting seat, the grouting pipe 16, the sealing plug, the branch pipe 12, the slurry storage assembly, and the first driving member, the slurry outlet hole on the retracted grouting pipe 16 will no longer spray grouting liquid, thereby improving the construction environment and avoiding the existing situation of waste of grouting liquid.

[0043] In another technical solution, it further includes a cleaning ring 15 and a water supply assembly. The cleaning ring 15 is mounted on the mounting base. The cleaning ring 15 is coaxially sleeved on the grouting pipe 16, and the interior of the cleaning ring 15 is hollow. A plurality of water outlet spray holes 23 are annularly arranged on the side wall of the cleaning ring 15 close to the grouting pipe 16. The water supply assembly is communicated with the plurality of water outlet spray holes 23 so that the plurality of water outlet spray holes 23 spray water towards the outer wall of the grouting pipe 16. Specifically, a support rod 13 is provided on the upper part of the support column 11. One end of the support rod 13 away from the support column 11 is provided with a vertically hollow rod 14. The bottom of the vertically hollow rod 14 is connected with a cleaning ring 15 with a hollow interior. The diameter of the cleaning ring 15 is larger than the outer diameter of the grouting pipe 16 so that the grouting pipe 16 can pass through the cleaning ring 15, and the cleaning ring 15 is coaxially sleeved outside the grouting pipe 16. The interior of the vertically hollow rod 14 is communicated with the interior of the cleaning ring 15. The vertically hollow rod 14 and the cleaning ring 15 are preferably integrally formed. A plurality of water outlet spray holes 23 are annularly arranged on the inner wall (the side wall where the inner circle is located) of the cleaning ring 15. The water supply assembly includes a water storage tank 8 and a second power pump 10. The water storage tank 8 is provided with a water inlet for adding water into the water storage tank 8. The water storage tank 8 is provided with a water outlet. The water outlet is communicated with the inlet of the second power pump 10 through a water pipe. The outlet of the second power pump 10 is communicated with the vertically hollow rod 14 through a water pipe. When the second power pump 10 is started, the water pressure in the water storage tank 8 is pressed into the cleaning ring 15, and the outer wall of the grouting pipe 16 is sprayed and cleaned through the water outlet spray holes 23. The relative position of the cleaning ring 15 and the sealing plug is: the cleaning ring 15 is arranged on the side of the sealing plug where the branch pipe 12 is provided. In this way, after the grouting pipe 16 completely disengages from the grouting hole and during the cleaning process of the grouting pipe 16, when the first driving member is started and the grouting pipe 16 is driven to move away from the support column 11, part of the water sprayed during the cleaning of the cleaning ring 15 will enter the installation section through the slurry outlet hole. On the one hand, with the assistance of water, the sealing plug can also better clean the inner wall of the grouting pipe 16. On the other hand, when the sealing plug moves relative to the grouting pipe 16, it can push the water that enters to the open end of the grouting pipe 16 to flow out, avoiding the residual water flow in the grouting pipe 16.

[0044] In this technical solution, further details further include: a cleaning layer is laid on the inner wall of the cleaning ring 15. The material of the cleaning layer can be sponge or brush bristles (the brush bristles are not shown in the figure here), which helps to better clean the outer wall of the grouting pipe 16.

[0045] In this technical solution, during use, when the grouting pipe 16 is completely disengaged from the grouting hole 26 and the grouting pipe 16 needs to be cleaned, the first driving member is activated to drive the grouting pipe 16 to move forward to a set point and then retreat back to its original position. During this process, the sealing plug can clean the inner wall of the grouting pipe 16, and the cleaning ring 15 can clean the outer wall of the grouting pipe 16. The two cooperate with each other to clean most of the grouting pipe 16. For the parts that are difficult to clean (such as the tip of the grouting pipe 16), manual cleaning can be carried out, which can reduce the cleaning workload as a whole.

[0046] In another technical solution, it further includes a brush assembly. The brush assembly includes a mounting pipe 20 coaxially and fixedly connected to the branch pipe 12. The mounting pipe 20 is provided with bristles 19, and the mounting pipe 20 is located within the installation section; wherein, the cleaning ring 15 is located on one side of the brush assembly close to the open end of the grouting pipe 16.

[0047] In the above technical solution, a mounting pipe 20 is coaxially and fixedly connected to the branch pipe 12. The mounting pipe 20 is provided with bristles 19, and the bristles 19 are in contact with the inner wall of the grouting pipe 16 in the installation section. When the first driving member drives the grouting pipe 16 to move away from its open end, the bristles 19 can further clean the inner wall of the grouting pipe 16, and have a good cleaning effect on some slurry adhered to the inner wall of the grouting pipe 16.

[0048] In another technical solution, the sealing plug includes a mounting block 17 coaxially and fixedly connected to the branch pipe 12, and a rubber layer 18 sleeved on the mounting block 17; adopting this technical solution, the beneficial effect obtained is that by providing the mounting block 17 and the rubber layer 18, a structure of the sealing plug is provided, and the processing and material selection are relatively extensive and simple.

[0049] In another technical solution, the rubber layer 18 is an internally hollow annular layer. The inner circle of the annular layer is fixedly connected to the mounting block 17, and the annular layer is provided with a first inflation port; specifically, the rubber layer 18 is an inflatable internally hollow ring shape. The rubber layer 18 is sleeved on the mounting block 17, and the rubber layer 18 is provided with an inflation port, which is the first inflation port. Through an external air injection device, the rubber layer 18 can be inflated. The main purpose of such a design is that when the grouting pipe 16 needs to be cleaned, the rubber layer 18 is deflated through the first inflation port to make the rubber layer 18 collapse, avoiding serious wear caused by the continuous contact between the rubber layer 18 and the inner wall of the grouting pipe 16 during the cleaning process. During use, the rubber layer 18 is inflated through the first inflation port to make the volume of the rubber layer 18 expand to a suitable size and abut against the inner wall of the grouting pipe 16 for convenient subsequent operations.

[0050] In another technical solution, an annular elastic cavity 21 is coaxially provided on the mounting pipe 20, the outer wall of the elastic cavity 21 is provided with the bristles 19, and a second inflation port is provided on the elastic cavity 21; specifically, an elastic cavity 21 is coaxially provided on the mounting pipe 20. The elastic cavity 21 can be fixedly arranged on the mounting pipe 20 or clamped on the mounting pipe 20. The outer wall of the elastic cavity 21 is provided with bristles 19 (which can be bonded). The material of the elastic cavity 21 can be rubber, silica gel, etc. A second inflation port is provided on the elastic cavity 21. Through an external inflation device, the elastic cavity 21 can be inflated to change its volume. It can not only adapt to grouting pipes 16 with different inner diameters, but also adjust the abutting force between the bristles 19 and the inner wall of the grouting pipe 16. By adaptively adjusting the abutting force, the cleaning effect of the bristles 19 can be improved.

[0051] In another technical solution, both the first inflation port and the second inflation port are connected with a lead-out hose 22, and a sealing cap is provided at the free end of the lead-out hose 22; the sealing cap can be clamped at the free port of the lead-out hose 22. During use, by adjusting the relative displacement between the grouting pipe 16 and the sealing plug, the lead-out hose 22 can be exposed, facilitating the operator to perform the inflation operation.

[0052] In another technical solution, the branch pipe 12 includes a first pipe 1201, a second pipe 1203 and a connecting pipe 1202. The mounting pipe 20 and the sealing plug are both arranged on the first pipe 1201. The diameter of the first pipe 1201 is smaller than the inner diameter of the grouting pipe 16, the diameter of the second pipe 1203 is slightly smaller than the inner diameter of the grouting pipe 16, and one end of the connecting pipe 1202 is detachably connected to the first pipe 1201 and the other end is detachably connected to the second pipe 1203; specifically, the branch pipe 12 includes a connecting pipe 1202, a first pipe 1201 and a second pipe 1203. The length of the first pipe 1201 is smaller than that of the second pipe 1203. The length of the first pipe 1201 is designed to be convenient for manual operation. The connecting pipe 1202 includes an integrally formed large-diameter section and a small-diameter section. The small-diameter section is threadedly connected to the first pipe 1201, and the large-diameter section is threadedly connected to the second pipe 1203. The diameter of the second pipe 1203 is slightly smaller than the inner diameter of the grouting pipe 16 (such as 1 - 3 mm smaller). In this way, when the grouting pipe 16 retracts and moves forward, the second pipe 1203 can play a guiding role. The diameter of the first pipe 1201 is smaller than the inner diameter of the grouting pipe 16 and is also smaller than the diameter of the second pipe 1203, facilitating the arrangement of structures such as the mounting block 17, the rubber layer 18, the mounting pipe 20, and the elastic cavity 21 on the first pipe 1201.

[0053] In this technical solution, during use, when connecting the branch pipe 12 to the grouting pipe 16, the sealing plug on the first pipe 1201 can be first inserted into the grouting pipe 16, then the connecting pipe 1202 is connected to the first pipe 1201, and then the second pipe 1203 is connected to the connecting pipe 1202, which facilitates the installation of the branch pipe 12 and is convenient for operation.

[0054] In another technical solution, it further includes a vehicle body 1. The mounting seat is arranged above the vehicle body 1, and an angle adjustment mechanism is connected between the mounting seat and the vehicle body 1 to adjust the angle of the mounting seat; the mounting seat includes a first seat 5 and a second seat 6 arranged in sequence from top to bottom. A lifting mechanism is arranged between the first seat 5 and the second seat 6, and the second seat 6 is connected to the angle connection mechanism;

[0055] In this technical solution, specifically, the vehicle body 1 is preferably a crawler vehicle body 1, and the crawler vehicle body 1 is convenient for walking stably at the construction site; an angle adjustment mechanism is arranged on the vehicle body 1, and the angle adjustment mechanism is a common structure in the art. For example, it may include: the angle adjustment mechanism includes a bottom column 2 that drives rotation (the bottom column 2 is rotatably arranged on the vehicle body 1 and can be driven to rotate by a motor). A first mounting platform 3 is arranged on the bottom column 2, and a second mounting platform 4 is hinged on the first mounting platform 3. The second mounting platform 4 is connected to the mounting seat. The second mounting platform 4 rotates in the vertical plane, and the second mounting platform 4 is driven to rotate by a hydraulic cylinder (the structure diagram of the hydraulic cylinder is not shown in the figure. The structure in which the hydraulic cylinder drives the second mounting platform 4 to rotate can be that the driving end (retractable end) of the hydraulic cylinder is hinged to the second mounting platform 4 and the fixed end is hinged to the first mounting platform 3. When the driving end of the hydraulic cylinder extends, it can drive the second mounting platform 4 to rotate in the vertical plane, and thus the angle of the second mounting platform 4 can be adjusted. This driving structure is very mature here and can refer to the above implementation method or other existing technologies);

[0056] An installation seat is arranged at the adjustment end of the angle adjustment mechanism. The installation seat includes a first seat 5 located in the upper part and a second seat 6 located in the lower part. The second seat 6 is arranged at the adjustment end of the angle adjustment mechanism. A lifting mechanism is connected between the first seat 5 and the second seat 6. The fixed end of the lifting mechanism is connected to the second seat 6, and the telescopic end is connected to the first seat 5 to drive the first seat 5 to lift. The lifting mechanism is also a common structure in the art, such as a scissor lift mechanism or a hydraulic cylinder, etc. Select an existing lifting mechanism according to the actual situation;

[0057] In this technical solution, during use, the vehicle body 1 is moved to the corresponding position, and the lifting mechanism and the angle adjustment mechanism are adjusted in cooperation to align the grouting pipe 16 with the grouting hole 26. Then, the first driving member is started to drive the grouting pipe 16 into the grouting hole 26. By adopting this technical solution, the beneficial effect obtained is that by designing the vehicle body 1, the angle adjustment mechanism, the first seat 5, the second seat 6, and the lifting mechanism, a structure that can adjust the angle and height of the grouting pipe 16 is provided, which is convenient for quickly adjusting the grouting pipe 16 to be aligned with the grouting hole 26 according to the construction site situation and facilitating the insertion of the grouting pipe 16 into the grouting hole 26.

[0058] The present invention also provides a full-section deep-hole pre-grouting method, which uses the above tunnel grouting device for pre-grouting construction, and specifically includes the following steps:

[0059] S1. Drill grouting holes on the heading face to be constructed. Among them, the distribution of the grouting holes is as follows: 22 first grouting holes are drilled at a distance of 0.5 m from the excavation boundary, and 24 second grouting holes are drilled at a distance of 1.0 m from the excavation boundary. The outward inclination angle of the first grouting holes is 9.2 - 9.4 degrees, and the outward inclination angle of the second grouting holes is 9.6 - 9.8 degrees. Specifically, the outward inclination angle (outward insertion angle) of the first grouting holes is preferably 9.3 degrees, and the outward inclination angle (outward insertion angle) of the second grouting holes is preferably 9.7 degrees.

[0060] S2. Start the vehicle body 1, move the tunnel grouting device to a position close to the first grouting hole, then start the lifting mechanism and the angle adjustment mechanism to make the angle of the grouting pipe 16 adapt to the first grouting hole (align the grouting pipe 16 with the first grouting hole). At this time, the sealing plug is located close to the first grouting hole. Then, start the first driving member to drive the grouting pipe 16 into the first grouting hole. Start the slurry storage assembly to press the grouting liquid into the grouting pipe 16. When the grouting is completed, start the first driving member again to drive the grouting pipe 16 to move along the branch pipe 12 until the grouting pipe 16 disengages from the first grouting hole. During this process, the grouting pipe 16 where the grouting section is located continues to grout the first grouting hole.

[0061] S3. After all the first grouting holes are grouted, after an interval of 2 - 3 hours, grout the second grouting holes according to the steps of S2. Specifically, when it is necessary to grout the second grouting holes, start the lifting mechanism and the angle adjustment mechanism to make the angle of the grouting pipe 16 adapt to the second grouting hole (align the grouting pipe 16 with the second grouting hole). At this time, the sealing plug is located close to the second grouting hole. Then, start the first driving member to drive the grouting pipe 16 into the second grouting hole, start the slurry storage assembly to press the grouting liquid into the grouting pipe 16. When the grouting is completed, start the first driving member again to drive the grouting pipe 16 to move along the branch pipe 12 until the grouting pipe 16 disengages from the second grouting hole. During this process, the grouting pipe 16 where the grouting section is located continues to grout the second grouting hole.

[0062] In the above technical solution, the purpose of grouting in two stages is that through the first grouting, a stable rock and soil layer can be pre-formed, which is convenient for the subsequent second grouting to better reinforce the rock and soil layer. Refer to the existing solutions for the problems encountered during the grouting process. For example, when the grouting pressure suddenly increases, only cement slurry or clear water should be injected. When the grouting volume is too large and the pressure does not increase for a long time, the grouting concentration and mix ratio should be adjusted; to prevent slurry cross-flow, it is advisable to separate the first grouting and the second grouting by 2 to 3 hours.

[0063] The equipment quantities and treatment scales described here are used to simplify the description of the present invention. The application, modification, and variation of the tunnel grouting device and the full-face deep-hole pre-grouting method of the present invention will be obvious to those skilled in the art.

[0064] Although the embodiments of the present invention have been disclosed as above, they are not limited to only the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples described herein.

Claims

1. Tunnel grouting device, characterized in that: include: Mounting seat; A grouting pipe, which is arranged above the mounting seat; A sealing assembly, comprising a sealing plug and a branch pipe slidably arranged in the grouting pipe, wherein the sealing plug divides the grouting pipe into a grouting section and an installation section, wherein the installation section is the grouting pipe between the sealing plug and the open end of the grouting pipe, wherein one end of the branch pipe passes through the sealing plug and is connected with the grouting section, and the other end of the branch pipe is mounted on the mounting seat, and the thickness of the sealing plug is greater than the diameter of the grouting hole on the grouting pipe; A grout storage assembly, which is in communication with one end of the branch pipe away from the sealing plug, so as to press grouting fluid into the grouting pipe; A first driving member drives the grouting pipe to move along the branch pipe.

2. The tunnel grouting device according to claim 1, characterized in that: It also includes a cleaning ring and a water supply assembly, wherein the cleaning ring is mounted on the mounting seat and coaxially sleeved on the grouting pipe, the cleaning ring is hollow inside, and a plurality of water outlet holes are arranged on the side wall of the cleaning ring close to the grouting pipe, and the water supply assembly is connected to the plurality of water outlet holes so that the plurality of water outlet holes spray water toward the outer wall of the grouting pipe.

3. The tunnel grouting device according to claim 2, characterized in that: It also includes a brush assembly, which includes a mounting tube coaxially fixed to the branch pipe, the mounting tube is provided with bristles, and the mounting tube is located in the installation section; wherein the cleaning ring is located on a side of the brush assembly close to the open end of the grouting pipe.

4. The tunnel grouting device according to claim 3, characterized in that: The sealing plug comprises a mounting block coaxially fixed on the branch pipe and a rubber layer sleeved on the mounting block.

5. The tunnel grouting device according to claim 4, characterized in that: The rubber layer is an annular layer with a hollow interior, the inner ring of the annular layer is fixedly connected to the mounting block, and the annular layer is provided with a first inflation port.

6. The tunnel grouting device according to claim 5, characterized in that: An annular elastic cavity is coaxially arranged on the installation tube, the bristles are arranged on the outer wall of the elastic cavity, and a second inflation port is arranged on the elastic cavity.

7. The tunnel grouting device according to claim 6, characterized in that: The first inflation port and the second inflation port are both connected with an outlet hose, and a sealing cover is provided at the free end of the outlet hose.

8. The tunnel grouting device according to claim 1, characterized in that: The branch pipe includes a first pipe, a second pipe and a connecting pipe. The mounting pipe and the sealing plug are both installed on the first pipe. The diameter of the first pipe is smaller than the inner diameter of the grouting pipe. The diameter of the second pipe is slightly smaller than the inner diameter of the grouting pipe. One end of the connecting pipe is detachably connected to the first pipe, and the other end is detachably connected to the second pipe.

9. The tunnel grouting device according to claim 1, characterized in that: It also includes a vehicle body, the mounting seat is arranged above the vehicle body, and an angle adjustment mechanism is connected between the mounting seat and the vehicle body to adjust the angle of the mounting seat; the mounting seat includes a first seat and a second seat arranged in sequence from top to bottom, a lifting mechanism is provided between the first seat and the second seat, and the second seat is connected to the adjustment end of the angle connection mechanism.

10. Full-section deep hole pre-grouting method, characterized in that: The pre-grouting construction is carried out using the tunnel grouting device as claimed in claim 9, which specifically includes the following steps: S1. Drill grouting holes on the face to be constructed; wherein the distribution of the grouting holes is as follows: 22 first grouting holes are drilled at 0.5 m along the excavation boundary, and 24 second grouting holes are drilled at 1.0 m away from the excavation boundary; the outward inclination angle of the first grouting holes is 9.2 to 9.4 degrees, and the outward inclination angle of the second grouting holes is 9.6 to 9.8 degrees; S2, start the vehicle body, move the tunnel grouting device to a position close to the first grouting hole, then start the lifting mechanism and the angle adjustment mechanism to make the angle of the grouting pipe adapt to the first grouting hole, at this time, the sealing plug is located close to the first grouting hole, then start the first driving member to drive the grouting pipe into the first grouting hole; start the grouting storage assembly to press the grouting fluid into the grouting pipe; when the grouting is completed, start the first driving member again to drive the grouting pipe to move along the branch pipe until the grouting pipe is detached from the first grouting hole, during this process, the grouting pipe where the grouting section is located continues to grout the first grouting hole; S3. After the grouting of the first grouting hole is completed, grouting is performed on the second grouting hole according to step S2 after an interval of 2 to 3 hours.

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