Grouting device for tunnel engineering

Abstract

The invention belongs to the technical field of grouting devices, and particularly relates to a grouting device for tunnel engineering, which comprises a high-pressure air pipe, a grouting pipe fitting is movably mounted in the high-pressure air pipe, a high-pressure rubber pipe is movably mounted at one end of the grouting pipe fitting, and the high-pressure rubber pipe is used for conveying grout. The grouting pipe fitting comprises a grouting guide pipe movably installed in the high-pressure air pipe and a connecting piece installed above the grouting guide pipe in a threaded mode, airflow of the air supply equipment can be blown out from a hole formed in the high-pressure air pipe and one end facing the interior of a drill hole, broken stones and rock powder are blown away, insertion of the high-pressure air pipe is not affected, and the grouting efficiency is improved. The grouting guide pipe is taken and inserted into the high-pressure air pipe until the corresponding grouting hole is aligned with the hole formed in the high-pressure air pipe, cement grout is conveyed into the grouting guide pipe, and continuous input of the cement grout enables the cement grout to pass through the grouting hole and the hole formed in the high-pressure air pipe to be output into rock gaps and gaps outside the drilled hole; and filling is carried out.

Description

Technical Field

[0001] The invention belongs to the field of grouting devices, in particular to a grouting device used for tunnel engineering. Background Art

[0002] During tunnel construction, an advanced grouting scheme can be adopted. Through high-pressure grouting technology, small conduits are buried for grouting before tunnel excavation to improve the stability of the surrounding rock. High-pressure slurry fills the cracks to form a solid waterproof barrier, effectively preventing the infiltration of water and sand and enhancing the bearing capacity of the surrounding rock. High-pressure grouting uses pressure to inject slurry into small conduits, which fill the cracks in the surrounding rock through penetration and diffusion to achieve waterproofing and reinforcement effects. The specific implementation method is to drill holes in the tunnel through drilling equipment, and then use an external grouting device through a grouting truck to allow the cement slurry to be filled into the gaps and spaces in the tunnel under the action of the grouting device.

[0003] The grouting system includes drilling, slurry storage, and grouting devices. After drilling, the grouting device is inserted into the drilled hole for grouting. The grouting device generally includes a small conduit for grouting and a high-pressure hose for conveying slurry.

[0004] A patent document with publication number CN204175234U discloses a device for sealing and grouting the orifice section of a grouting hole in a tunnel, comprising a grouting pipe, one end of which has an inherent nut, and a group of cross-connected gaskets and rubber plugs, a screw rod sleeve and a capstan are sequentially mounted on the outside of the grouting pipe from the nut to the top, a bearing is installed between the screw rod sleeve and the capstan, the part of the grouting pipe passing through the capstan is threadedly connected to a valve through a double male hollow joint, the other end of the valve is threadedly connected to a four-male three-way joint, the horizontal through holes of the four-male three-way joint are respectively connected to the slurry inlet pipe and the slurry outlet pipe, the vertical through holes are connected to the grouting pipe, and the solid end is pressed against the tunnel wall through a support rod and a sleeper.

[0005] In the traditional technical solution, after a hole is drilled in the tunnel by a drilling device, a grouting tube is inserted into the hole to inject cement slurry. However, in the case where the rock type in the middle of the tunnel is mainly sandstone and shale, with a small amount of dolomite locally, the sandstone and shale are mainly uniformly weathered clastic rocks, and the dolomite, dolomitic limestone and limestone are mainly dissolved and weathered carbonate rocks. That is, the hole drilled before the tunnel construction has broken and loose gravel and rock powder inside. In the traditional technical solution, when the grouting tube is inserted into the borehole, it will be hindered by the gravel and rock powder.

[0006] To this end, the present invention provides a grouting device for tunnel engineering. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve the technical problem is as follows: a grouting device for tunnel engineering of the present invention comprises a drilling assembly for drilling a hole in a tunnel and a high-pressure air duct inserted into the inside of the drilled hole, a grouting pipe fitting is movably installed inside the high-pressure air duct, a high-pressure rubber hose is movably installed at one end of the grouting pipe fitting, the high-pressure rubber hose is used to transport slurry, the grouting pipe fitting comprises a grouting conduit movably installed inside the high-pressure air duct and a connector threadedly installed above the grouting conduit, a ball valve pipe is installed at one end of the connector, and the ball valve pipe is connected to the end of the high-pressure rubber hose by means of threads;

[0009] A cone is fixedly installed at the lower end of the grouting conduit, a cross-shaped opening is arranged at the tip of the cone, a plurality of grouting holes are opened through the interior of the grouting conduit, and a plurality of holes for air outlet opened inside the high-pressure air duct match the plurality of grouting holes.

[0010] Preferably, the high-pressure air duct includes an inner tube and an outer ring fixedly installed on the outer side of the inner tube, and a plurality of component grooves are formed through the inner tube and the outer ring.

[0011] Preferably, the inner part of the outer ring is provided with a plurality of arc grooves and a plurality of strip grooves, filling strips are fixedly installed in the plurality of strip grooves, a slurry outlet assembly is installed between two adjacent filling strips, and the slurry outlet assembly is installed on the outer side of a component groove.

[0012] Preferably, a connecting strip groove is provided inside the filling strip, and the connecting strip groove extends into the arc groove, two adjacent arc grooves are connected through the connecting strip groove, and an air guide groove is also provided at one end of the filling strip facing the pulp outlet assembly.

[0013] Preferably, the slurry discharge assembly includes an airbag strip installed at one end of the filling strip and an arc ring installed on one side of the airbag strip. The arc ring is a component made of elastic material. An adjustment assembly is installed inside the filling strip. The adjustment assembly can change the arc ring from a full moon state to a waning moon state.

[0014] Preferably, the adjustment assembly includes a piston slidably mounted on the top of the air guide groove, and a guide ring fixedly mounted on the bottom of the air guide groove, a guide column is fixedly mounted on the lower end of the piston, and a compression spring is mounted on the outside of the guide column.

[0015] Preferably, one end of the guide column passes through the guide ring and extends to the inside of the airbag strip, and one end of the guide column is fixedly connected to the side of the arc-shaped ring.

[0016] Preferably, the airbag strip is a component made of a hard material, one side of the airbag strip is in close contact with the filling strip, and the other side is arranged in an arc shape, and one side of the arc shape is in close contact with the arc ring.

[0017] Preferably, a middle column and a round ball are fixedly mounted on the side of the arc ring facing the high-pressure air duct, and the arc ring is movably mounted on the outside of the high-pressure air duct through the middle column and the round ball.

[0018] Preferably, an air guide ring is installed on the outer side of the connecting piece, an air intake pipe is installed on the outer side of the air guide ring, the air intake pipe opens downward, and this opening matches with a plurality of arc grooves, and the air intake pipe is connected to an external air supply device.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. A grouting device for tunnel engineering of the present invention drills multiple holes at a construction location through a drilling device, connects one end of a high-pressure air duct to an external air supply device, takes one end and slowly inserts it into the borehole, and the airflow of the air supply device blows out from the holes set inside the high-pressure air duct and one end toward the borehole, so as to blow away gravel and rock powder without affecting the insertion of the high-pressure air duct. After the high-pressure air duct is inserted into the borehole, the grouting conduit is taken and inserted into the interior of the high-pressure air duct until the corresponding grouting holes are aligned with the holes set in the high-pressure air duct, and cement slurry is transported to the interior of the grouting conduit. The continuous input of cement slurry will allow the cement slurry to be output through the grouting holes and the holes of the high-pressure air duct to the rock gaps and crevices outside the borehole to fill them.

[0021] 2. A grouting device for tunnel engineering of the present invention, wherein an arc groove is opened inside an outer ring through the device, and the arc groove is connected by a plurality of connecting grooves. When gas is input into the arc groove, the gas can enter the plurality of arc grooves and the connecting grooves, which is equivalent to being poured into the entire high-pressure air duct. After the high-pressure air duct is filled with gas, the air pressure inside the high-pressure air duct can continue to be increased, and the regulating component is driven by the increased air pressure, thereby squeezing two adjacent arc rings to deform them from a full moon state to a waning moon state, that is, at this time, the two arc rings no longer form a circular shape, but form an elliptical shape. At this time, when the slurry output from the grouting hole and the component groove passes through the two elliptical arc rings, the output rate of the slurry will be accelerated due to the acceleration of the fluid due to the smaller cross-section. In addition, when dealing with a longer gap, the two arc rings in the elliptical state can allow the slurry to be output in the form of long strips, which can be filled into the longer gap at a faster rate.

[0022] 3. A grouting device for tunnel engineering of the present invention, after multiple arc grooves and filling strips are filled with gas, the continued input of gas will increase the internal air pressure. When the air pressure becomes larger, it will push the piston and the guide column to slide inside the air guide groove, reduce the distance between the piston and the guide ring, and then squeeze the compression spring. The guide ring is the guide structure of the guide column. The guide column pushes the arc ring to cause it to deform. At this time, the two ends of the arc ring are installed on the inner wall of the strip groove. The two arc rings after deformation are in an elliptical state, thereby changing the output state of the cement slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is an overall stereogram of the present invention;

[0025] Figure 2 It is a three-dimensional schematic diagram of the grouting pipe fitting in the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the grouting conduit in the present invention;

[0027] Figure 4 It is a schematic diagram of a top view of a high-pressure air duct in the present invention;

[0028] Figure 5 It is a three-dimensional schematic diagram of the high-pressure air duct cut in the present invention;

[0029] Figure 6 It is a three-dimensional schematic diagram of the filling strip in the present invention;

[0030] Figure 7 It is a three-dimensional schematic diagram of the adjustment component in the present invention;

[0031] Figure 8 It is a three-dimensional schematic diagram of the middle column and the round ball in the present invention.

[0032] In the figure: 1. high-pressure hose; 2. high-pressure air duct; 21. inner tube; 22. outer ring; 221. arc groove; 222. strip groove; 23. filling strip; 231. connecting strip groove; 232. air guide groove; 24. component groove; 3. grouting pipe fittings; 31. ball valve pipe; 32. connecting piece; 33. grouting conduit; 331. grouting hole; 4. conical piece; 5. air guide ring; 51. air inlet pipe; 6. slurry outlet assembly; 61. air bag strip; 62. arc ring; 621. middle column; 622. round ball; 63. adjustment assembly; 631. piston; 632. guide column; 633. compression spring; 634. guide ring. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-Figure 3As shown, a grouting device for a tunnel engineering according to an embodiment of the present invention comprises a high-pressure air duct 2, a grouting pipe fitting 3 is movably installed inside the high-pressure air duct 2, a high-pressure rubber hose 1 is movably installed at one end of the grouting pipe fitting 3, the high-pressure rubber hose 1 is used to transport slurry, the grouting pipe fitting 3 comprises a grouting conduit 33 movably installed inside the high-pressure air duct 2 and a connector 32 threadedly installed above the grouting conduit 33, a ball valve pipe 31 is installed at one end of the connector 32, and the ball valve pipe 31 is connected to the end of the high-pressure rubber hose 1 by means of threads;

[0036] A conical member 4 is fixedly installed at the lower end of the grouting conduit 33, and a cross-shaped opening is set at the tip of the conical member 4. A plurality of grouting holes 331 are opened through the interior of the grouting conduit 33, and a plurality of holes for air outlet opened inside the high-pressure air duct 2 match the plurality of grouting holes 331.

[0037] Specifically, when the rock types in the middle of the tunnel are mainly sandstone and shale, with a small amount of dolomite locally interspersed, the sandstone and shale are mainly uniformly weathered clastic rocks, and the dolomite, dolomitic limestone and limestone are mainly dissolved and weathered carbonate rocks, and advance grouting is required. At this time, a plurality of holes are drilled at the construction location by a drilling device. The holes drilled before the tunnel construction have broken and loose gravel and rock powder inside. One end of the high-pressure air duct 2 is connected to the external air supply equipment, and one end is slowly inserted into the borehole. The airflow of the air supply equipment will be blown out from the holes set inside the high-pressure air duct 2 and one end toward the borehole, blowing the gravel and rock powder without affecting the insertion of the high-pressure air duct 2. After the high-pressure air duct 2 is inserted into the borehole, the grouting conduit 33 is taken out and inserted into the interior of the high-pressure air duct 2 until the corresponding grouting hole 331 is aligned with the hole set in the high-pressure air duct 2. At this time, one end of the conical member 4 is exposed on the outside of the high-pressure air duct 2, and cement is first poured into the gap between the end of the borehole and the high-pressure air duct 2 close to the outside to prevent the slurry from flowing to the outside through the borehole during subsequent high-pressure grouting. The high-pressure hose 1 and the grouting conduit 33 are connected through the connecting piece 32, and the high-pressure hose 1 is connected to the storage vehicle in the grouting system. During grouting, a large amount of slurry in the storage vehicle is transported to the inside of the grouting conduit 33 through the high-pressure hose 1. The continuous input of cement slurry will allow the cement slurry to be output through the grouting hole 331 and the holes of the high-pressure air duct 2 to the rock gaps and cracks outside the borehole, filling them, thereby improving the stability of the surrounding rock and achieving waterproof and reinforcement effects. The high-pressure air duct 2 is used as a protective structure to facilitate the rapid insertion of the grouting conduit 33, and when the grouting conduit 33 is inserted, the gravel and rock powder on the inner wall of the borehole will not fall and submerge the borehole.

[0038] like Figure 4 As shown, the high-pressure air duct 2 includes an inner tube 21 and an outer ring 22 fixedly installed on the outer side of the inner tube 21 , and a plurality of component grooves 24 are formed through the inner tube 21 and the outer ring 22 .

[0039] like Figure 4-Figure 6 As shown, a plurality of arc grooves 221 and a plurality of strip grooves 222 are provided inside the outer ring 22, a filling strip 23 is fixedly installed inside the plurality of strip grooves 222, a slurry discharge assembly 6 is installed between two adjacent filling strips 23, the slurry discharge assembly 6 is installed on the outside of a component groove 24, a connecting strip groove 231 is provided through the filling strip 23, the connecting strip groove 231 extends through and into the arc groove 221, two adjacent arc grooves 221 are connected via the connecting strip groove 231, and an air guide groove 232 is also provided at one end of the filling strip 23 facing the slurry discharge assembly 6.

[0040] The slurry discharge assembly 6 includes an airbag strip 61 installed at one end of the filling strip 23 and an arc ring 62 installed on one side of the airbag strip 61. The arc ring 62 is a component made of elastic material. An adjustment assembly 63 is installed inside the filling strip 23. The adjustment assembly 63 allows the arc ring 62 to be deformed and changed from a full moon state to a waning moon state.

[0041] Specifically, when the high-pressure air duct 2 is inserted into the borehole while ventilating, the air flow is blown out through the grouting hole 331 and the component groove 24, blowing the gravel and rock powder to prevent the gravel and rock powder from hindering the insertion of the structure. When the grouting conduit 33 is inserted into the high-pressure air duct 2, the grouting hole 331 corresponds to the position of the component groove 24. At this time, cement slurry is poured into the grouting conduit 33. Through the continuous input of cement slurry, the cement slurry will be output from the grouting hole 331 and the component groove 24, and poured into the gaps and clearances in the tunnel. The device is provided with an arc groove 221 inside the outer ring 22. The arc groove 221 is connected by a plurality of connecting grooves 231. When gas is input into the arc groove 221, the gas can enter the plurality of arc grooves 221 and the connecting grooves 23 1, which is equivalent to pouring into the entire high-pressure air duct 2. After the high-pressure air duct 2 is filled with gas, the internal air pressure of the high-pressure air duct 2 can be further increased, and the regulating component 63 is driven by the increased air pressure to squeeze the two adjacent arc rings 62 to deform them from the full moon state to the waning moon state, that is, at this time, the two arc rings 62 no longer form a circular shape, but form an elliptical shape. At this time, when the slurry output from the grouting hole 331 and the component groove 24 passes through the two elliptical arc rings 62, the output rate of the slurry will be accelerated due to the acceleration of the fluid due to the smaller cross-section. In addition, when dealing with a longer gap, the two arc rings 62 in the elliptical state can allow the slurry to be output in a long strip, so that it can be filled into the longer gap at a faster rate.

[0042] like Figure 2 As shown, an air guide ring 5 is installed on the outer side of the connecting member 32, and an air intake pipe 51 is installed on the outer side of the air guide ring 5. The air intake pipe 51 opens downward, and this opening matches with a plurality of arc grooves 221. The air intake pipe 51 is connected to an external air supply device.

[0043] Specifically, an air guide ring 5 can be installed on the outside of the connecting piece 32. When the connecting piece 32 is threadedly connected to the grouting conduit 33, the air guide ring 5 rests against the side of the grouting conduit 33, and air can be injected into the air guide ring 5 through the air inlet pipe 51. The gas enters the high-pressure air duct 2 through the opening below the air guide ring 5 that matches the multiple arc grooves 221.

[0044] Embodiment 2

[0045] like Figure 7 As shown, compared with Example 1, another embodiment of the present invention is: the adjustment component 63 includes a piston 631 slidably mounted on the top of the air guide groove 232, and a guide ring 634 fixedly mounted on the bottom of the air guide groove 232, a guide column 632 is fixedly mounted on the lower end of the piston 631, a compression spring 633 is mounted on the outer side of the guide column 632, one end of the guide column 632 passes through the guide ring 634 and extends to the inside of the airbag strip 61, and one end of the guide column 632 is fixedly connected to the side of the arc ring 62.

[0046] The airbag strip 61 is a component made of hard material. One side of the airbag strip 61 is in close contact with the filling strip 23 , and the other side is arranged in an arc shape, and one side of the arc shape is in close contact with the arc ring 62 .

[0047] Specifically, after the multiple arc grooves 221 and the filling strips 23 are filled with gas, the continued input of gas will increase the internal air pressure. When the air pressure becomes larger, it will push the piston 631 and the guide column 632 to slide inside the air guide groove 232, reducing the distance between the piston 631 and the guide ring 634, thereby squeezing the compression spring 633. The guide ring 634 is a guide structure for the guide column 632. The guide column 632 pushes the arc ring 62 to cause it to deform. At this time, the two ends of the arc ring 62 are installed on the inner wall of the strip groove 222. The two arc rings 62 after deformation are in an elliptical state, thereby changing the output state of the cement slurry.

[0048] like Figure 8 As shown, a middle column 621 and a round ball 622 are fixedly mounted on the side of the arc ring 62 facing the high-pressure air duct 2 , and the arc ring 62 is movably mounted on the outside of the high-pressure air duct 2 through the middle column 621 and the round ball 622 .

[0049] Specifically, the two ends of the arc ring 62 can be set in an arc shape, and both ends of the arc ring 62 are movably installed through the intermediate column 621 and the ball 622. When the middle part of the arc ring 62 is deformed, the two ends of the arc ring 62 will be slightly displaced. At this time, the setting of the intermediate column 621 and the ball 622 can meet the rotation of the end of the arc ring 62, but will not change the overall position of the arc ring 62.

[0050] Working principle: When the rock type in the middle of the tunnel is mainly sandstone and shale, with a small amount of dolomite locally, the sandstone and shale are mainly uniformly weathered clastic rocks, and the dolomite, dolomitic limestone and limestone are mainly dissolved and weathered carbonate rocks, and advance grouting is required. At this time, a plurality of holes are drilled at the construction location by a drilling device. The holes drilled before the tunnel construction have broken and loose gravel and rock powder inside. Connect one end of the high-pressure air duct 2 to the external air supply equipment, take one end and slowly insert it into the borehole. The airflow of the air supply equipment will be blown out from the holes set inside the high-pressure air duct 2 and one end toward the borehole, blowing the gravel and rock powder without affecting the insertion of the high-pressure air duct 2. After the high-pressure air duct 2 is inserted into the borehole, take the grouting conduit 33 and insert it into the high-pressure air duct 2 until the corresponding grouting hole 331 is reached. The conical member 4 is aligned with the hole set in the high-pressure air duct 2. At this time, one end of the conical member 4 is exposed on the outside of the high-pressure air duct 2. Cement is first poured into the gap between the borehole and the end of the high-pressure air duct 2 close to the outside to prevent the slurry from flowing to the outside through the borehole during subsequent high-pressure grouting. The high-pressure hose 1 and the grouting conduit 33 are connected by the connecting piece 32. The storage vehicle transports the cement slurry to the inside of the grouting conduit 33 through the high-pressure hose 1. The continuous input of cement slurry will allow the cement slurry to be output through the grouting hole 331 and the hole of the high-pressure air duct 2 to the rock gaps and cracks outside the borehole, filling them, thereby improving the stability of the surrounding rock and achieving waterproof and reinforcement effects. The high-pressure air duct 2 is used as a protective structure to facilitate the rapid insertion of the grouting conduit 33. When the grouting conduit 33 is inserted, the gravel and rock powder on the inner wall of the borehole will not fall and submerge the borehole.

[0051] When the high-pressure air duct 2 is inserted into the borehole while ventilating, the air flow is blown out through the grouting hole 331 and the component groove 24, blowing the gravel and rock powder to prevent the gravel and rock powder from hindering the insertion of the structure. When the grouting conduit 33 is inserted into the high-pressure air duct 2, the grouting hole 331 corresponds to the position of the component groove 24. At this time, cement slurry is poured into the grouting conduit 33. Through the continuous input of cement slurry, the cement slurry will be output from the grouting hole 331 and the component groove 24, and poured into the gaps and clearances in the tunnel. The device is provided with an arc groove 221 inside the outer ring 22. The arc groove 221 is connected by a plurality of connecting grooves 231. When gas is input into the arc groove 221, the gas can enter the plurality of arc grooves 221 and the connecting grooves 231. The part is equivalent to being poured into the entire high-pressure air duct 2. After the internal gas of the high-pressure air duct 2 is filled, the internal air pressure of the high-pressure air duct 2 can continue to be increased, and the regulating component 63 is driven by the increased air pressure, thereby squeezing the two adjacent arc rings 62 to deform them from a full moon state to a waning moon state, that is, at this time, the two arc rings 62 no longer form a circular shape, but an elliptical shape. At this time, when the slurry output from the grouting hole 331 and the component groove 24 passes through the two elliptical arc rings 62, the output rate of the slurry will be accelerated due to the acceleration of the fluid due to the smaller cross-section. In addition, when dealing with a longer gap, the two arc rings 62 in the elliptical state can allow the slurry to be output in a long strip, which can be filled into the longer gap at a faster rate.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A grouting device for tunnel engineering, comprising a high-pressure air duct (2), characterized in that: A grouting pipe fitting (3) is movably installed inside the high-pressure air duct (2), a high-pressure rubber hose (1) is movably installed at one end of the grouting pipe fitting (3), and the high-pressure rubber hose (1) is used to transport slurry. The grouting pipe fitting (3) comprises a grouting conduit (33) movably installed inside the high-pressure air duct (2) and a connecting piece (32) threadedly installed above the grouting conduit (33), a ball valve pipe (31) is installed at one end of the connecting piece (32), and the ball valve pipe (31) is connected to the end of the high-pressure rubber hose (1) by means of threads; A conical member (4) is fixedly mounted at the lower end of the grouting conduit (33), a cross-shaped opening is arranged at the tip of the conical member (4), a plurality of grouting holes (331) are arranged through the interior of the grouting conduit (33), and a plurality of holes for air outlet arranged inside the high-pressure air duct (2) match the plurality of grouting holes (331).

2. A grouting device for tunnel engineering according to claim 1, characterized in that: The high-pressure air duct (2) comprises an inner tube (21) and an outer ring (22) fixedly mounted on the outside of the inner tube (21); the inner tube (21) and the outer ring (22) are both provided with a plurality of component grooves (24) extending therethrough.

3. A grouting device for tunnel engineering according to claim 2, characterized in that: The outer ring (22) is provided with a plurality of arc-shaped grooves (221) and a plurality of strip-shaped grooves (222) inside, a filling strip (23) is fixedly installed inside the plurality of strip-shaped grooves (222), a slurry discharge assembly (6) is installed between two adjacent filling strips (23), and the slurry discharge assembly (6) is installed outside a component groove (24).

4. A grouting device for tunnel engineering according to claim 3, characterized in that: A connecting groove (231) is provided inside the filling strip (23), and the connecting groove (231) extends into the interior of the arc-shaped groove (221). Two adjacent arc-shaped grooves (221) are connected via the connecting groove (231). An air guide groove (232) is also provided at one end of the filling strip (23) facing the pulp outlet assembly (6).

5. A grouting device for tunnel engineering according to claim 4, characterized in that: The slurry discharge assembly (6) comprises an airbag strip (61) installed at one end of the filling strip (23) and an arc ring (62) installed at one side of the airbag strip (61); the arc ring (62) is a component made of elastic material; an adjustment assembly (63) is installed inside the filling strip (23); the arc ring (62) is deformed by the adjustment assembly (63) to change from a full moon state to a waning moon state.

6. A grouting device for tunnel engineering according to claim 5, characterized in that: The adjustment assembly (63) comprises a piston (631) slidably mounted on the top of the air guide groove (232), and a guide ring (634) fixedly mounted on the bottom of the air guide groove (232); a guide column (632) is fixedly mounted on the lower end of the piston (631), and a compression spring (633) is mounted on the outer side of the guide column (632).

7. A grouting device for tunnel engineering according to claim 6, characterized in that: One end of the guide column (632) passes through the guide ring (634) and extends to the inside of the airbag strip (61), and one end of the guide column (632) is fixedly connected to the side of the arc-shaped ring (62).

8. A grouting device for tunnel engineering according to claim 5, characterized in that: The airbag strip (61) is a component made of a hard material. One side of the airbag strip (61) is in close contact with the filling strip (23), and the other side is arranged in an arc shape, and the side arranged in the arc shape is in close contact with the arc ring (62).

9. A grouting device for tunnel engineering according to claim 5, characterized in that: An intermediate column (621) and a round ball (622) are fixedly mounted on the side of the arc-shaped ring (62) facing the high-pressure air duct (2); the arc-shaped ring (62) is movably mounted on the outside of the high-pressure air duct (2) via the intermediate column (621) and the round ball (622).

10. A grouting device for tunnel engineering according to claim 4, characterized in that: An air guide ring (5) is installed on the outer side of the connecting piece (32), and an air intake pipe (51) is installed on the outer side of the air guide ring (5). The air intake pipe (51) opens downward, and this opening matches a plurality of arc-shaped grooves (221). The air intake pipe (51) is connected to an external air supply device.

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