Tunnel small guide pipe supporting and mounting device and supporting method

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a tunnel small conduit supporting and installing device and a supporting method.The tunnel small conduit supporting and installing device comprises a moving plate, two adjusting bases are fixedly connected to the upper surface of the moving plate, a supporting cover is arranged between the two adjusting bases, and a servo motor is fixedly installed on the upper surface of the moving plate; transmission screws are fixedly mounted at the output ends of the two servo motors, transmission blocks are in threaded connection with the outer surfaces of the two transmission screws, the side faces, close to each other, of the two transmission blocks are fixedly connected with the outer surface of a supporting cover, and a driving cover is fixedly connected to the left end of the supporting cover. According to the invention, the effect of mechanical auxiliary installation when the tunnel small guide pipe is supported is achieved, the problems of high labor intensity and low construction efficiency of a current manual installation mode can be solved, and particularly, in large-scale tunnel construction, under the condition that a large number of small guide pipes need to be installed, rapid construction can be realized, and the support installation speed of the small guide pipes is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and specifically provides a tunnel small pipe support installation device and a support method. Background Technique

[0002] Tunnel engineering refers to the construction project of building underground, underwater or in mountains, which is used for laying railways and building roads for motor vehicles to pass through. According to the location, it can be divided into three categories: mountain tunnels, underwater tunnels and urban tunnels. Mountain tunnels are tunnels that pass through mountains or hills to shorten the distance and avoid large slopes. Underwater tunnels are tunnels that pass under rivers or under the seabed to cross rivers or straits. Urban tunnels are tunnels that pass through the underground of cities to meet the needs of railways passing through large cities.

[0003] In the construction of tunnel engineering, the stability and safety of the tunnel are of crucial importance. As a commonly used advanced support measure, small pipe support plays a key role in the process of tunnel excavation. By driving small pipes into the tunnel surrounding rock and injecting slurry, the small pipes are tightly combined with the surrounding rock, thereby enhancing the self-stability ability of the surrounding rock and effectively controlling the deformation and collapse risks of the surrounding rock.

[0004] At present, the installation work of traditional small pipe support usually relies on manual operation. Workers need to hold the small pipes at the tunnel face and use pneumatic picks to drive the small pipes into the surrounding rock. This manual installation method has a high labor intensity and low construction efficiency. Especially in large-scale tunnel construction, a large number of small pipes need to be installed, and manual operation is difficult to meet the requirements of the construction progress. Therefore, the present invention provides a tunnel small pipe support installation device and a support method. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a tunnel small pipe support installation device and a support method, which solve the problems that the installation work of traditional small pipe support usually relies on manual operation at present. Workers need to hold the small pipes at the tunnel face and use pneumatic picks to drive the small pipes into the surrounding rock. This manual installation method has a high labor intensity and low construction efficiency. Especially in large-scale tunnel construction, a large number of small pipes need to be installed, and manual operation is difficult to meet the requirements of the construction progress.

[0006] To achieve the above object, the present invention provides the following technical solution: A tunnel small duct support installation device, including a moving plate, two adjusting seats are fixedly connected to the upper surface of the moving plate, a support cover is arranged between the two adjusting seats, a servo motor is fixedly installed on the upper surface of the moving plate, drive screws are fixedly installed at the output ends of the two servo motors, drive blocks are threadedly connected to the outer surfaces of the two drive screws, and the outer surfaces of the two drive blocks are fixedly connected to the outer surface of the support cover. The left end of the support cover is fixedly connected to a drive cover, an electric push rod is fixedly installed on the inner side wall of the drive cover, a sliding cover is fixedly installed at the telescopic end of the electric push rod, a rotary motor is fixedly installed on the inner side wall of the sliding cover, a drill rod is fixedly installed at the output end of the rotary motor, a mortar hopper is arranged above the moving plate, a grouting pump is fixedly installed on the bottom surface of the moving plate, a material taking pipe is fixedly communicated with the input end of the grouting pump, the top end of the material taking pipe sequentially penetrates through the moving plate and the mortar hopper and extends into the interior of the mortar hopper, a discharge pipe is fixedly communicated with the output end of the grouting pump, a connection head is fixedly communicated with the left end of the discharge pipe, a grouting hose is fixedly communicated with the left end of the connection head, and a controller is fixedly installed on the left side surface of the adjusting seat.

[0007] As a preferred technical solution of the present invention, a cover plate is fixedly installed on the upper surface of the mortar hopper, a reduction motor is fixedly installed on the upper surface of the cover plate, a drive shaft is fixedly installed at the output end of the reduction motor, and a plurality of stirring blades are fixedly connected to the outer surface of the drive shaft.

[0008] As a preferred technical solution of the present invention, a feeding port is opened on the upper surface of the cover plate, and an electric valve is fixedly communicated with the outer surface of the material taking pipe.

[0009] As a preferred technical solution of the present invention, a limiting sliding ring is fixedly connected to the right end of the sliding cover, the outer surface of the limiting sliding ring is slidably connected to the inner ring of the support cover, and a through hole is opened on the left side surface of the support cover.

[0010] As a preferred technical solution of the present invention, bearing rings are fixedly embedded in the inner top walls of the two adjusting seats, bearing seats are fixedly connected to the inner side walls of the two adjusting seats, the inner rings of the two bearing seats and the inner rings of the two bearing rings are respectively fixedly connected to the outer surfaces of the two drive screws, a bearing ring is fixedly embedded in the right side surface of the sliding cover, and the inner ring of the bearing ring is fixedly connected to the outer surface of the drill rod.

[0011] As a preferred technical solution of the present invention, a reinforcing plate is fixedly connected to the upper surfaces of the two drive blocks together, the bottom surface of the reinforcing plate is fixedly connected to the upper surface of the support cover, two fixed side plates are fixedly connected to the upper surface of the moving plate, and the right side surfaces of the two fixed side plates are respectively fixedly connected to the left side surfaces of the two adjusting seats.

[0012] As a preferred technical solution of the present invention, two sets of universal wheels are fixedly installed on the bottom surface of the moving plate, and moving push handles are fixedly connected to the right side surfaces of the two adjusting seats.

[0013] As a preferred technical solution of the present invention, a plurality of support seats are fixedly connected to the upper surface of the moving plate, and the bottom surface of the mortar hopper is fixedly connected to the upper surface of each support seat.

[0014] As a preferred technical solution of the present invention, limiting holes are formed in the outer surfaces of the two adjusting seats, limiting blocks are slidably connected to the inner walls of the two limiting holes, and one side surfaces of the two limiting blocks close to each other are fixedly connected to one side surfaces of the two transmission blocks away from each other.

[0015] As a preferred technical solution of the present invention, S1, adjust the opening position of the drill rod. By driving the support cover and the drill rod to move up and down through the transmission block, the opening height of the drill rod can be adjusted; S2, start the rotation motor and the electric push rod to work. The rotation motor drives the rotation of the drill rod to open a hole in the tunnel; S3, utilize the stretching movement of the electric push rod to drive the drill rod to move outwards, so that the drill rod can automatically open a hole to an appropriate depth; S4, then use a pneumatic drill with impact to push the small guide pipe into the hole, and the pushing-in length is not less than 90% of the length of the steel pipe, and about 30 cm is exposed and supported on the steel frame behind the excavation surface; S5, by starting the grouting pump, the mortar inside the mortar hopper can be extracted, transported through the discharge pipe and the grouting hose, and the slurry is injected, so that the small guide pipe and the surrounding rock can be closely combined.

[0016] Compared with the prior art, the present invention provides a tunnel small guide pipe support installation device and a support method, which have the following beneficial effects:

[0017] 1. For the tunnel small guide pipe support installation device and the support method, through the two adjusting seats provided on the moving plate, the servo motor, the transmission screw rod and the transmission block can be installed, and a lifting adjustment assembly can be formed, which will drive the support cover and the drill rod to flexibly adjust the height, facilitating the debugging of the drilling height of the drill rod, and at the same time playing a role in supporting the support rod and the drill rod. There is no need for manual holding to support it. Through the stretching movement of the electric push rod, the drill rod can be driven to move outwards, so that the drill rod can automatically drill to an appropriate depth.

[0018] 2. The small duct support installation device and support method for the tunnel, through the setting of the mortar hopper and its cooperation with the grouting pump, discharge pipe and grouting hose, can quickly inject the slurry, enabling the small duct to be quickly and tightly combined with the surrounding rock, thus achieving the effect of mechanical auxiliary installation during the support of the tunnel small duct, solving the problems of high labor intensity and low construction efficiency in the current manual installation method. Especially in large-scale tunnel construction, when a large number of small ducts need to be installed, it can quickly construct and improve the support installation speed of the small ducts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the front view of the present invention;

[0020] Figure 2 It is a cross-sectional view of the front view of the present invention;

[0021] Figure 3 It is a cross-sectional view of the side view of the adjusting seat in the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the side view of the adjusting seat in the present invention;

[0023] Figure 5 It is a cross-sectional view of the front view of the support cover in the present invention;

[0024] Figure 6 It is a cross-sectional view of the top view of the adjusting seat in the present invention;

[0025] Figure 7 It is a flowchart of the method of the present invention.

[0026] In the figure: 1. Moving plate; 2. Adjusting seat; 3. Limiting sliding ring; 4. Servo motor; 5. Transmission screw; 6. Transmission block; 7. Support cover; 8. Driving cover; 9. Electric push rod; 10. Sliding cover; 11. Rotary motor; 12. Bearing ring; 13. Drill rod; 14. Mortar hopper; 15. Cover plate; 16. Reduction motor; 17. Driving shaft; 18. Stirring blade plate; 19. Electric valve; 20. Material taking pipe; 21. Grouting pump; 22. Discharge pipe; 23. Connector; 24. Grouting hose; 25. Limiting block; 26. Limiting hole; 27. Reinforcing plate; 28. Bearing seat; 29. Universal wheel; 30. Moving push handle; 31. Bearing ring; 32. Feeding port; 33. Support seat; 34. Fixed side plate; 35. Controller; 36. Through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment

[0029] Please refer to Figure 1-7 , in this implementation scheme: A tunnel small pipe support installation device includes a moving plate 1. Two adjusting seats 2 are fixedly connected to the upper surface of the moving plate 1. A support cover 7 is arranged between the two adjusting seats 2. A servo motor 4 is fixedly installed on the upper surface of the moving plate 1. The output ends of the two servo motors 4 are both fixedly installed with transmission screws 5. The outer surfaces of the two transmission screws 5 are both threadedly connected with transmission blocks 6. The mutually close side surfaces of the two transmission blocks 6 are both fixedly connected to the outer surface of the support cover 7. The left end of the support cover 7 is fixedly connected with a driving cover 8. An electric push rod 9 is fixedly installed on the inner side wall of the driving cover 8. The telescopic end of the electric push rod 9 is fixedly installed with a sliding cover 10. A rotating motor 11 is fixedly installed on the inner side wall of the sliding cover 10. The output end of the rotating motor 11 is fixedly installed with a drill rod 13. A mortar hopper 14 is arranged above the moving plate 1. A grouting pump 21 is fixedly installed on the bottom surface of the moving plate 1. The input end of the grouting pump 21 is fixedly communicated with a material taking pipe 20. The top end of the material taking pipe 20 sequentially penetrates through the moving plate 1 and the mortar hopper 14 and extends into the interior of the mortar hopper 14.

[0030] The output end of the grouting pump 21 is fixedly communicated with a discharge pipe 22. The left end of the discharge pipe 22 is fixedly communicated with a connecting head 23. The left end of the connecting head 23 is fixedly communicated with a grouting hose 24. A controller 35 is fixedly installed on the left side surface of the adjusting seat 2. The grouting pump 21 is a high-pressure fluid device for transporting materials such as cement, mortar, and water glass, and is widely used in fields such as construction, mining, and metallurgy. It sucks and discharges materials from the hopper through the reciprocating movement of the piston. When the piston moves downward, the valve opens, and the materials in the hopper enter the cylinder through the feed port. When the piston moves upward, the valve closes, and the materials in the cylinder are discharged through the discharge port. The electric push rod 9 is also called a linear actuator, and is mainly a new type of linear actuator composed of a motor push rod and a control device and other mechanisms.

[0031] In this embodiment, a cover plate 15 is fixedly installed on the upper surface of the mortar hopper 14, a reduction motor 16 is fixedly installed on the upper surface of the cover plate 15, a drive shaft 17 is fixedly installed at the output end of the reduction motor 16, a plurality of stirring blades 18 are fixedly connected to the outer surface of the drive shaft 17, a material injection port 32 is formed in the upper surface of the cover plate 15, an electric valve 19 is fixedly communicated with the outer surface of the material taking pipe 20. Through the arrangement of the reduction motor 16, the drive shaft 17 and the stirring blades 18 provided at the bottom of the cover plate 15, the mortar inside the mortar hopper 14 can be stirred and mixed to avoid the phenomenon of mortar precipitation. The material injection port 32 is used to facilitate the injection of mortar raw materials. The electric valve 19 has the characteristics of small volume, light weight, two-way flow and small flow resistance. It can cut off various media such as pulp, ash slag, sewage, etc. The liftable gate sealing surface can scrape off adhesives and automatically remove sundries.

[0032] In this embodiment, a limit sliding ring 3 is fixedly connected to the right end of the sliding cover 10. The outer surface of the limit sliding ring 3 is slidably connected to the inner ring of the support cover 7. A through hole 36 is formed in the left side surface of the support cover 7. Bearing rings 31 are fixedly embedded in the inner top walls of the two adjusting seats 2 respectively. Bearing seats 28 are fixedly connected to the inner side walls of the two adjusting seats 2 respectively. The inner rings of the two bearing seats 28 and the inner rings of the two bearing rings 31 are fixedly connected to the outer surfaces of the two transmission screws 5 respectively. A bearing ring 12 is fixedly embedded in the right side surface of the sliding cover 10. The inner ring of the bearing ring 12 is fixedly connected to the outer surface of the drill rod 13. Limit holes 26 are formed in the outer surfaces of the two adjusting seats 2 respectively. Limit blocks 25 are slidably connected to the inner walls of the two limit holes 26 respectively. The mutually approaching side surfaces of the two limit blocks 25 are fixedly connected to the mutually departing side surfaces of the two transmission blocks 6 respectively. Through the arrangement of the limit sliding ring 3, the sliding cover 10 can slide smoothly left and right inside the support cover 7. By using the arrangement of the through hole 36, the normal telescopic movement of the electric push rod 9 can be ensured. By using the arrangement of the bearing seats 28 and the bearing rings 31, the transmission screw 5 will rotate stably. Through the arrangement of the bearing ring 12, the drill rod 13 can rotate stably. By using the arrangement of the limit holes 26 and the limit blocks 25, the function of limiting the height adjustment of the support cover 7 is achieved.

[0033] In this embodiment, a reinforcement plate 27 is fixedly connected to the upper surfaces of the two transmission blocks 6. The bottom surface of the reinforcement plate 27 is fixedly connected to the upper surface of the support cover 7. Two fixed side plates 34 are fixedly connected to the upper surface of the moving plate 1. The right side surfaces of the two fixed side plates 34 are respectively fixedly connected to the left side surfaces of the two adjusting seats 2. Two sets of universal wheels 29 are fixedly installed on the bottom surface of the moving plate 1. The right side surfaces of the two adjusting seats 2 are both fixedly connected to a moving push handle 30. A plurality of support seats 33 are fixedly connected to the upper surface of the moving plate 1. The upper surface of each support seat 33 is fixedly connected to the bottom surface of the mortar hopper 14. Through the arrangement of the reinforcement plate 27, it plays a role in strengthening and supporting the transmission block 6 and the support cover 7. By using the arrangement of the fixed side plates 34, the connection and installation between the moving plate 1 and the adjusting seat 2 will be deepened. Through the arrangement of the moving push handle 30 and the universal wheels 29, the device can be moved flexibly, facilitating the opening of holes at different positions in the tunnel.

[0034] In this embodiment: S1, adjust the opening position of the drill rod 13. By driving the support cover 7 and the drill rod 13 to move up and down through the transmission block 6, the opening height of the drill rod 13 can be adjusted; S2, start the rotation motor 11 and the electric push rod 9 to work. The rotation motor 11 drives the rotation of the drill rod 13, and the tunnel can be opened; S3, utilize the extension movement of the electric push rod 9, which will drive the drill rod 13 to move outwards, enabling the drill rod 13 to automatically open to an appropriate depth; S4, then use a pneumatic drill with impact to push the small guide pipe into the hole. The pushing-in length is not less than 90% of the steel pipe length, and the exposed part is about 30 cm and is supported on the steel frame behind the excavation surface; S5, by starting the grouting pump 21, the mortar inside the mortar hopper 14 can be pumped out, and it will be transported through the discharge pipe 22 and the grouting hose 24, and the slurry will be injected, enabling the small guide pipe to be closely combined with the surrounding rock.

[0035] The working principle and usage process of the present invention: First, accurately mark the hole positions on the excavation surface of the tunnel with red paint. Then move the device and adjust the opening position of the drill rod 13. The controller 35 can be used to start the operation of the two servo motors 4, which will drive the two transmission screws 5 to be in threaded cooperation with the two transmission blocks 6, and drive the support cover 7 and the drill rod 13 to move up and down through the transmission block 6, facilitating the adjustment of the opening height of the drill rod 13. Then start the rotation motor 11 and the electric push rod 9 to work. The rotation motor 11 drives the rotation of the drill rod 13, and the tunnel can be opened. The extension movement of the electric push rod 9 will drive the drill rod 13 to move outwards, enabling the drill rod 13 to automatically open to an appropriate depth;

[0036] Next, use a pneumatic drill with impact to push the small duct into the hole. The pushing length should be no less than 90% of the steel pipe length, and the exposed part is about 30 cm and supported on the steel frame behind the excavation face. Then start the reduction motor 16 and the grouting pump 21 to work, which can drive the drive shaft 17 and the stirring vane 18 to stir and mix the mortar in the mortar hopper 14. Then, by starting the grouting pump 21, the mortar in the mortar hopper 14 can be pumped out, transported through the discharge pipe 22 and the grouting hose 24, and the slurry is injected, enabling the small duct to be closely combined with the surrounding rock, thereby enhancing the self-stabilizing ability of the surrounding rock.

[0037] In the description of the present invention, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a reference structure" does not exclude the existence of additional identical elements in the process, method, article or device including the said element. It should be noted that in this text, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tunnel small conduit support and installation device, comprising a movable plate (1), characterized in that: The upper surface of the movable plate (1) is fixedly connected to two adjustment seats (2), a support cover (7) is provided between the two adjustment seats (2), a servo motor (4) is fixedly installed on the upper surface of the movable plate (1), a transmission screw (5) is fixedly installed on the output ends of the two servo motors (4), the outer surfaces of the two transmission screws (5) are threadedly connected to transmission blocks (6), the side surfaces of the two transmission blocks (6) close to each other are fixedly connected to the outer surface of the support cover (7), the left end of the support cover (7) is fixedly connected to a drive cover (8), the inner side wall of the drive cover (8) is fixedly installed with an electric push rod (9), the telescopic end of the electric push rod (9) is fixedly installed with a sliding cover (10), and the inner side wall of the sliding cover (10) is fixedly installed A rotating motor (11) is installed, and a drill rod (13) is fixedly installed at the output end of the rotating motor (11). A mortar bucket (14) is provided above the movable plate (1), and a grouting pump (21) is fixedly installed on the bottom surface of the movable plate (1). The input end of the grouting pump (21) is fixedly connected to a material taking pipe (20), and the top end of the material taking pipe (20) passes through the movable plate (1) and the mortar bucket (14) in sequence and extends to the inside of the mortar bucket (14). The output end of the grouting pump (21) is fixedly connected to a discharge pipe (22), and the left end of the discharge pipe (22) is fixedly connected to a connector (23), and the left end of the connector (23) is fixedly connected to a grouting hose (24). A controller (35) is fixedly installed on the left side of the adjustment seat (2).

2. A tunnel small conduit support and installation device according to claim 1, characterized in that: A cover plate (15) is fixedly mounted on the upper surface of the mortar bucket (14), a reduction motor (16) is fixedly mounted on the upper surface of the cover plate (15), a drive shaft (17) is fixedly mounted on the output end of the reduction motor (16), and a plurality of stirring blades (18) are fixedly connected to the outer surface of the drive shaft (17).

3. A tunnel small conduit support and installation device according to claim 2, characterized in that: The upper surface of the cover plate (15) is provided with a material injection port (32), and the outer surface of the material extraction pipe (20) is fixedly connected to an electric valve (19).

4. A tunnel small conduit support and installation device according to claim 1, characterized in that: The right end of the sliding cover (10) is fixedly connected to a limit slip ring (3), the outer surface of the limit slip ring (3) is slidably connected to the inner ring of the support cover (7), and a through hole (36) is provided on the left side surface of the support cover (7).

5. A tunnel small conduit support and installation device according to claim 1, characterized in that: The inner top walls of the two adjustment seats (2) are fixedly inlaid with bearing rings (31), the inner side walls of the two adjustment seats (2) are fixedly connected with bearing seats (28), the inner rings of the two bearing seats (28) and the inner rings of the two bearing rings (31) are respectively fixedly connected to the outer surfaces of the two transmission screws (5), the right side surface of the sliding cover (10) is fixedly inlaid with a bearing ring (12), and the inner ring of the bearing ring (12) is fixedly connected to the outer surface of the drill rod (13).

6. A tunnel small conduit support and installation device according to claim 1, characterized in that: The upper surfaces of the two transmission blocks (6) are commonly fixedly connected with a reinforcement plate (27), the bottom surface of the reinforcement plate (27) is fixedly connected with the upper surface of the support cover (7), the upper surface of the movable plate (1) is fixedly connected with two fixed side plates (34), and the right sides of the two fixed side plates (34) are respectively fixedly connected with the left sides of the two adjustment seats (2).

7. A tunnel small conduit support and installation device according to claim 1, characterized in that: Two sets of universal wheels (29) are fixedly mounted on the bottom surface of the movable plate (1), and the right sides of the two adjustment seats (2) are fixedly connected with movable push handles (30).

8. A tunnel small conduit support and installation device according to claim 1, characterized in that: A plurality of support seats (33) are fixedly connected to the upper surface of the movable plate (1), and the upper surface of each support seat (33) is fixedly connected to the bottom surface of the mortar bucket (14).

9. A tunnel small conduit support and installation device according to claim 1, characterized in that: The outer surfaces of the two adjustment seats (2) are each provided with a limiting hole (26), the inner walls of the two limiting holes (26) are both slidably connected to the limiting blocks (25), and the side surfaces of the two limiting blocks (25) that are close to each other are respectively fixedly connected to the side surfaces of the two transmission blocks (6) that are away from each other.

10. A tunnel small conduit support method according to any one of claims 1 to 9, characterized in that: S1, adjusting the hole opening position of the drill rod (13), driving the support cover (7) and the drill rod (13) to move up and down through the transmission block (6), so that the hole opening height of the drill rod (13) can be adjusted; S2, starting the rotating motor (11) and the electric push rod (9) to work, the rotating motor (11) drives the drill rod (13) to rotate, so that a hole can be opened in the tunnel; S3, using the extension movement of the electric push rod (9), it will drive the drill rod (13) to move outward, so that the hole opening height of the drill rod (13) can be adjusted; The drill rod (13) automatically drills a hole to a suitable depth; S4, then a pneumatic drill with impact is used to push the small conduit into the hole, the pushed-in length being not less than 90% of the length of the steel pipe, and about 30 cm is exposed and supported on a steel frame behind the excavation surface; S5, by starting the grouting pump (21), the mortar inside the mortar bucket (14) can be extracted, and it will be transported through the discharge pipe (22) and the grouting hose (24), and the slurry is injected, so that the small conduit can be tightly combined with the surrounding rock.

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