Automatic guniting device for treating tunnel loopholes, leaking stoppage equipment and leaking stoppage construction method

Abstract

The invention discloses an automatic guniting device for treating tunnel loopholes, leaking stoppage equipment and a leaking stoppage construction method, and belongs to the technical field of geotechnical engineering.The automatic guniting device comprises a rotary guniting system, a first high-pressure slurry conveying pipe, a second high-pressure slurry conveying pipe and a third high-pressure slurry conveying pipe, a pipe opening of the first high-pressure slurry conveying pipe faces upwards and is connected with a first high-pressure nozzle; a plurality of second high-pressure slurry conveying pipes are fixedly arranged in the circumferential direction of the first high-pressure slurry conveying pipe, pipe openings of the second high-pressure slurry conveying pipes are bent outwards in the radial direction of the small-sized alloy sleeve and are connected with second high-pressure nozzles, and mud cutting blades are rotationally installed on the outer walls of the second high-pressure nozzles in the circumferential direction. The automatic control system is used for controlling the rotary guniting system to carry out guniting, the sprayed slurry and the supporting protection system form an umbrella-shaped concrete protection layer after being solidified, and therefore the purposes of blocking the tunnel loophole, enhancing the strength of the outer wall around the tunnel loophole and preventing loophole relapse are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to an automatic grouting device, leak-blocking equipment and a leak-blocking construction method for treating tunnel leaks. Background Art

[0002] Faced with the problem of underground tunnel engineering structures being damaged and leaking, if the tunnel leaks are not filled in time, there is a high possibility of water leakage in the tunnel, affecting the normal use of the building. The tunnel is in a humid environment for a long time, which is easy to breed various microorganisms and bacteria, not only affecting the normal work of personnel and equipment, but also causing problems such as mildew and failure in the tunnel. It shortens the service life of the tunnel project, causes fires caused by damp wires in the tunnel, accelerates the alkali aggregate reaction of structural concrete and the corrosion of steel bars in the concrete structure, and in cold and severe cold areas, the concrete structure will be frozen and cracked due to water leakage, affecting the safety of the tunnel structure. If the tunnel leaks cannot be plugged in time, causing a large amount of water leakage in the tunnel, using engineering machinery to eliminate the internal leakage of the project requires a lot of energy and funds, and a large amount of drainage may also cause uneven settlement and damage to the ground and ground buildings. When the tunnel wall encounters geological problems or is damaged due to internal collisions, resulting in holes in the tunnel, water leaks, slurry leaks, etc., it is urgent to take remedial measures and use appropriate engineering equipment to quickly fill the holes. If manual repair measures are used, it is not easy for workers to operate and delays the construction speed. Therefore, in the face of such problems, it is necessary to develop a device that can quickly fill the tunnel holes and restore the normal use of the tunnel.

[0003] At present, the industry's measures for plugging tunnel leaks mostly use simple machinery in combination with manual work. The manual plugging method is not easy to operate. Manual operation is dangerous and the quality of completion is not high when the tunnel is leaking. Second, the efficiency of manual operation is not as high as that of automated machinery, and the tunnel leaks cannot be plugged faster.

[0004] To this end, the present invention proposes an automatic grouting device, a leak-blocking device and a leak-blocking construction method for treating tunnel leaks. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that most of the existing technologies use simple machinery in combination with manual work to plug leaks. The manual plugging method is not convenient to operate. Manual operation is dangerous and the completion quality is not high. Second, the efficiency of manual operation is not as high as that of automated machinery, and the plugging of tunnel leaks cannot be completed more quickly. An automatic spraying device, plugging equipment and plugging construction method for treating tunnel leaks are proposed.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an automatic grouting device for treating tunnel leaks, comprising: a rotary grouting system, which comprises: A small alloy sleeve, a first high-pressure slurry delivery pipe is fixedly arranged on the axis of the small alloy sleeve, and the pipe mouth of the first high-pressure slurry delivery pipe faces upward and is connected to a first high-pressure nozzle; a plurality of second high-pressure slurry delivery pipes are fixedly arranged in the circumference of the first high-pressure slurry delivery pipe, the pipe mouths of the second high-pressure slurry delivery pipes are bent outwardly along the radial direction of the small alloy sleeve and are connected to a second high-pressure nozzle, and a mud cutting blade is circumferentially mounted on the outer wall of the second high-pressure nozzle; A medium alloy sleeve, wherein the medium alloy sleeve is connected to the small alloy sleeve via a plurality of bearings; A merging pipe connected to the lower ends of the first high-pressure slurry delivery pipe and the plurality of the second high-pressure slurry delivery pipes; A conveying device is used to convey the plugging material into the junction pipe.

[0007] As a further description of the above technical solution: the first high-pressure nozzle and the second high-pressure nozzle adopt high-pressure self-rotating nozzles.

[0008] As a further description of the above technical solution: the conveying device includes a plugging material storage area, a stirring area and a pumping area, and the plugging material storage area, the stirring area and the pumping area are connected in sequence through a conveying pipe, the stirring area has evenly distributed rotating stirring blades, the pumping area is connected to the confluence pipe through a conveying pipe, and the conveying pipe and the confluence pipe are connected through a rotating joint.

[0009] As a further description of the above technical solution: a first driving mechanism for driving the small alloy sleeve to rotate is arranged inside the medium alloy sleeve; a second driving mechanism for driving the mud cutting blade to rotate is installed on the outer wall of the second high-pressure nozzle.

[0010] As a further description of the above technical solution: the number of the second high-pressure slurry delivery pipes is four, and the number of the bearings is three.

[0011] A leak-proof device for treating tunnel leaks, comprising an automatic grouting device and a support protection system, wherein the support protection system comprises: A large alloy sleeve, the large alloy sleeve being arranged outside the medium alloy sleeve; a plurality of automatically rebounding triangular baffles are hinged on the inner wall of the large alloy sleeve, and in the initial state, the plurality of triangular baffles can cover the passage of the large alloy sleeve to form a circular closed structure; A support sleeve, which is arranged outside the large alloy sleeve, and four support rods are hinged on the outer wall of the upper end of the support sleeve, and the support rods can only rotate outwards; The outer shell is arranged outside the supporting sleeve, and a plurality of rubber strips corresponding to the support rods are circumferentially extended from the upper end of the outer shell.

[0012] As a further description of the above technical solution: the inner wall of the large alloy sleeve is fixedly provided with a first retractable support top plate that can be extended and retracted toward the inside of the large alloy sleeve, and the outer wall of the large alloy sleeve is fixedly provided with a second retractable support top plate that can be extended and retracted toward the outside of the large alloy sleeve, and the first retractable support top plate and the second retractable support top plate both adopt an electric retractable cylinder structure.

[0013] As a further description of the above technical solution: The upper supporting part of the outer shell is entirely made of high-strength rubber, an alloy inner core is arranged inside the lower part, and the outside is wrapped with high-strength rubber.

[0014] As a further description of the above technical solution: the outer wall of the large alloy sleeve is arranged with multiple grooves, and the inner wall of the support sleeve is correspondingly provided with multiple clamping strips slidably connected to the multiple grooves, and the support sleeve can be moved forward by a jack.

[0015] A method for plugging a leak using a plugging device for treating a leak in a tunnel, comprising the following steps: a) Treat the hole, remove the gravel and grind it, install the rotary spraying system into the support protection system, open the first retractable support top plate that is telescoped toward the inner wall of the large alloy sleeve, and fix the rotary spraying system; install the outer shell and the four support rods on the support sleeve, and insert the installed support protection system into the treated hole; b) connecting the conveying device to the junction pipe; c) Start the first driving mechanism and the second driving mechanism to rotate the small alloy sleeve and the mud cutting blade, and use the jack to support the support sleeve, so that the support sleeve moves along the card strip to the outside of the hole, and the four support rods open the rubber strip on the upper part of the outer shell. When the support sleeve reaches the top, open the second retractable support top plate that retracts the large alloy sleeve outward, drag the support sleeve, and remove the jack to prevent it from moving; d) Turn on the conveying device, stir and mix the raw materials, and then convey them to the confluence pipe through the one-way high-pressure pump, and turn on the first high-pressure nozzle and the second high-pressure nozzle for rotary spraying; e) after reaching the set shotcrete limit, the first drive mechanism and the second drive mechanism are turned off, so that the small alloy sleeve and the mud cutting blade stop rotating; f) closing the first retractable supporting top plate that is retracted toward the inner wall by the large alloy sleeve, and slowly pulling out the rotary spraying system at the same time. When the rotary spraying system descends to below the triangular baffles, all the triangular baffles fall down to seal the channel, and the conveying device is closed; g) After the rotary shotcrete system is completely pulled out, insert a high-strength rubber plug into the support and protection system to seal the bottom.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention forms an umbrella-shaped concrete protective layer around the tunnel hole, thereby blocking the tunnel hole and strengthening the strength of the outer wall around the tunnel hole to prevent the recurrence of the hole, greatly enhancing the safety of the tunnel hole periphery and effectively preventing the secondary damage of the tunnel hole.

[0017] 2. The present invention is controlled by an automatic control system, which greatly reduces the process of manual operation and protects the life safety of construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic structural diagram of an automatic grouting device for treating tunnel leaks.

[0019] Figure 2 This is a diagram of the outer wall of a small alloy sleeve of an automatic grouting device for treating tunnel leaks proposed by the present invention.

[0020] Figure 3 This is a distribution diagram of the nozzles of an automatic grouting device for treating tunnel leaks proposed by the present invention.

[0021] Figure 4 A schematic diagram of a conveying device of an automatic grouting device for treating tunnel leaks proposed by the present invention.

[0022] Figure 5 The present invention is a schematic structural diagram of a leakage plugging device for treating tunnel leaks.

[0023] Figure 6 A diagram of a large alloy sleeve and a supporting sleeve of a leak plugging device for treating tunnel leaks proposed by the present invention.

[0024] Figure 7 This is a distribution diagram of the triangular baffles of a leak-proof device for treating tunnel leaks proposed by the present invention.

[0025] Figure 8 This is a diagram of an outer casing and a plug of a leak-proof device for treating tunnel leaks proposed by the present invention.

[0026] Fig. 9 A diagram showing the expanded outer shell of a leak-proof device for treating tunnel leaks proposed by the present invention.

[0027] Fig.10 This is a diagram of the device for plugging leaks in tunnels proposed by the present invention before the back cover is provided.

[0028] Fig.11 The present invention provides a schematic diagram of the overall steps of a leak-proof construction method for a leak-proof device for treating tunnel leaks.

[0029] Fig.12 This is a schematic diagram of step a of a leak plugging construction method for a leak plugging device for treating tunnel leaks proposed by the present invention.

[0030] Fig.13 This is a schematic diagram of step c of a leak-plugging construction method of a leak-plugging device for treating tunnel leaks proposed by the present invention.

[0031] Fig.14 A schematic diagram of step f of a leak plugging construction method of a leak plugging device for treating tunnel leaks proposed by the present invention.

[0032] Fig.15 A schematic diagram of step g of a leak-plugging construction method for a leak-plugging device for treating tunnel leaks proposed by the present invention.

[0033] Fig.16 This is the effect picture after tunnel treatment.

[0034] Legend: 1-1, first high-pressure nozzle; 1-2, second high-pressure nozzle; 2, mud cutting blade; 3-1, first high-pressure slurry delivery pipe; 3-2, second high-pressure slurry delivery pipe; 4, small alloy sleeve; 5, bearing; 6, confluence pipe; 7, medium alloy sleeve; 8, large alloy sleeve; 9, support sleeve; 10, support rod; 11, groove; 12, clamping strip; 13, triangular baffle; 14, first retractable support top plate; 15, outer shell; 16, bayonet; 17, rubber strip; 18, high-strength rubber plug; 19, raw material storage bin; 20, additive storage bin; 21, stirring area; 22, pumping area; 23, delivery pipeline. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-4The present invention provides a technical solution: an automatic grouting device for treating tunnel leaks, comprising: a rotary grouting system and a conveying device, the rotary grouting system comprising a small alloy sleeve 4, a medium alloy sleeve 7 and a confluence pipe 6: a first high-pressure slurry delivery pipe 3-1 is fixedly arranged on the axis of the small alloy sleeve 4, and the pipe mouth of the first high-pressure slurry delivery pipe 3-1 faces upward and is connected to a first high-pressure nozzle 1-1; a plurality of second high-pressure slurry delivery pipes 3-2 are fixedly arranged in the circumferential direction of the first high-pressure slurry delivery pipe 3-1, the pipe mouth of the second high-pressure slurry delivery pipe 3-2 is bent outward along the radial direction of the small alloy sleeve 4 and is connected to a second high-pressure nozzle 1-2, and a mud cutting blade 2 is circumferentially mounted on the outer wall of the second high-pressure nozzle 1-2; the medium alloy sleeve 7 is connected to the small alloy sleeve 4 by a plurality of bearings 5; the confluence pipe 6 is connected to the lower ends of the first high-pressure slurry delivery pipe 3-1 and a plurality of the second high-pressure slurry delivery pipes 3-2; the conveying device is used to convey the plugging material into the confluence pipe 6.

[0037] In a specific embodiment of the present invention, the first high-pressure nozzle 1-1 and the second high-pressure nozzle 1-2 are high-pressure self-rotating nozzles.

[0038] In a specific embodiment of the present invention, the conveying device includes a plugging material storage area, a stirring area 21 and a pumping area 22, and the plugging material storage area, the stirring area 21 and the pumping area 22 are connected in sequence through a transmission pipe, the stirring area has evenly distributed rotating stirring blades, the pumping area 22 is connected to the confluence pipe 6 through a conveying pipe 23, and the conveying pipe 23 is connected to the confluence pipe 6 through a rotating joint. It is worth noting that the plugging material storage area includes a raw material storage bin 19 and an additive storage bin 20.

[0039] In a specific embodiment of the present invention, a first driving mechanism for driving the small alloy sleeve 4 to rotate is arranged inside the medium alloy sleeve 7; a second driving mechanism for driving the mud cutting blade 2 to rotate is installed on the outer wall of the second high-pressure nozzle 1-2. It is worth noting that both the first driving mechanism and the second driving mechanism can be driven by a motor, and can be specifically connected to the components through a transmission mechanism, such as a common gear transmission, a pulley transmission mechanism, etc.

[0040] In a specific embodiment of the present invention, the number of the second high-pressure slurry delivery pipes 3 - 2 is four, and the number of the bearings 5 ​​is three.

[0041] See also Figure 5-10The present invention provides a technical solution: a plugging device for treating tunnel leaks, comprising an automatic grouting device and a support and protection system, wherein the support and protection system comprises a large alloy sleeve 8, a support sleeve 9 and an outer shell 15: the large alloy sleeve 8 is arranged outside the medium alloy sleeve 7; a plurality of automatically rebounding triangular baffles 13 are hinged on the inner wall of the large alloy sleeve 8, and when in the initial state, the plurality of triangular baffles 13 can cover the passage of the large alloy sleeve 8, A circular closed structure is formed; the support sleeve 9 is arranged on the outside of the large alloy sleeve 8, and four support rods 10 are hinged on the outer wall of the upper end of the support sleeve 9, and the support rods 10 can only rotate outward; the outer shell 15 is arranged on the outside of the support sleeve 9, and a plurality of rubber strips 17 corresponding to the support rods 10 are circumferentially extended from the upper end of the outer shell 15, and a clamping block 16 is fixed on the surface of the rubber strip 17, and the end of the support rod 10 is against the clamping block 16, so that the rubber strip 17 can be stretched to a horizontal state.

[0042] In a specific embodiment of the present invention, a first retractable support top plate 14 capable of extending and retracting toward the inside of the large alloy sleeve 8 is fixedly provided on the inner wall of the large alloy sleeve 8, and a second retractable support top plate capable of extending and retracting toward the outside of the large alloy sleeve 8 is fixedly provided on the outer wall of the large alloy sleeve 8. Both the first retractable support top plate 14 and the second retractable support top plate adopt an electric retractable cylinder structure. Specifically, the piston end of the electric retractable cylinder is connected to a support top plate, which drives the support top plate to extend and retract horizontally. The number of support top plates is set to at least one, and when multiple support top plates are arranged, they are arranged in a ring-shaped interval.

[0043] In a specific embodiment of the present invention, the upper rubber strip 17 of the outer shell 15 is entirely made of high-strength rubber, an alloy core is disposed inside the lower part, and the outside is wrapped with high-strength rubber.

[0044] In a specific embodiment of the present invention, the outer wall of the large alloy sleeve 8 is arranged with multiple grooves 11, and the inner wall of the support sleeve 9 is correspondingly provided with multiple clamping strips 12 slidably connected to the multiple grooves 11, and the support sleeve 9 can be moved forward by a jack.

[0045] See also Figure 11-16 The present invention provides a technical solution: a leak plugging construction method of a leak plugging device for treating tunnel leaks, comprising the following construction steps: a) Treat the hole, remove the gravel and grind it, install the rotary spraying system into the support protection system, open the first retractable support top plate 14 that is telescopic to the inner wall side of the large alloy sleeve 8, and fix the rotary spraying system; install the outer shell 15 and the four support rods 10 on the support sleeve 9, and insert the installed support protection system into the treated hole; b) connecting the conveying device to the confluence pipe 6; c) Start the first driving mechanism and the second driving mechanism to rotate the small alloy sleeve 4 and the mud cutting blade 2, and use the jack to support the support sleeve 9, so that the support sleeve 9 moves to the outside of the hole along the clamping strip 12, and the four support rods 10 open the rubber strip 17 on the upper part of the outer shell 15. When the support sleeve 9 reaches the top, open the second retractable support top plate of the large alloy sleeve 8 to extend outward, drag the support sleeve 9, and remove the jack to prevent it from moving; d) Turn on the conveying device, stir and mix the raw materials, and then convey them to the confluence pipe 6 through the one-way high-pressure pump, and turn on the first high-pressure nozzle 1-1 and the second high-pressure nozzle 1-2 for rotary spraying; e) after reaching the set shotcrete limit, the first drive mechanism and the second drive mechanism are turned off, so that the small alloy sleeve 4 and the mud cutting blade 2 stop rotating; f) closing the first retractable supporting top plate 14 of the large alloy sleeve 8 that is retracted toward the inner wall, and slowly withdrawing the rotary spraying system. When the rotary spraying system descends to below the triangular baffles 13, all the triangular baffles 13 fall down to seal the passage, and the conveying device is closed; g) After the rotary shotcrete system is completely extracted, a high-strength rubber plug 18 is inserted into the support and protection system to seal the bottom.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic grouting device for treating tunnel leaks, characterized in that: include: The rotary shotcrete system comprises: A small alloy sleeve (4), a first high-pressure slurry delivery pipe (3-1) is fixedly arranged on the axis of the small alloy sleeve (4), and the pipe mouth of the first high-pressure slurry delivery pipe (3-1) faces upward and is connected to a first high-pressure nozzle (1-1); a plurality of second high-pressure slurry delivery pipes (3-2) are fixedly arranged in the circumferential direction of the first high-pressure slurry delivery pipe (3-1), the pipe mouths of the second high-pressure slurry delivery pipes (3-2) are bent outwardly along the radial direction of the small alloy sleeve (4) and are connected to a second high-pressure nozzle (1-2), and a mud cutting blade (2) is circumferentially rotatably mounted on the outer wall of the second high-pressure nozzle (1-2); A medium-sized alloy sleeve (7), wherein the medium-sized alloy sleeve (7) is connected to the small-sized alloy sleeve (4) via a plurality of bearings (5); A merging pipe (6), the merging pipe (6) being connected to the lower ends of the first high-pressure slurry delivery pipe (3-1) and the plurality of the second high-pressure slurry delivery pipes (3-2); And, a conveying device, wherein the conveying device is used to convey the plugging material into the confluence pipe (6).

2. The automatic grouting device for treating tunnel leaks according to claim 1 is characterized in that: The first high-pressure nozzle (1-1) and the second high-pressure nozzle (1-2) are high-pressure self-rotating nozzles.

3. The automatic grouting device for treating tunnel leaks according to claim 1 is characterized in that: The conveying device comprises a plugging material storage area, a stirring area (21) and a pumping area (22); the plugging material storage area, the stirring area (21) and the pumping area (22) are connected in sequence via a conveying pipeline; the stirring area (21) has evenly distributed rotating stirring blades; the pumping area (22) is connected to a merging pipe (6) via a conveying pipeline (23); and the conveying pipeline (23) and the merging pipe (6) are connected via a rotating joint.

4. The automatic grouting device for treating tunnel leaks according to claim 1 is characterized in that: A first driving mechanism for driving the small alloy sleeve (4) to rotate is arranged inside the medium alloy sleeve (7); and a second driving mechanism for driving the mud cutting blade (2) to rotate is installed on the outer wall of the second high-pressure nozzle (1-2).

5. The automatic grouting device for treating tunnel leaks according to claim 1 is characterized in that: The number of the second high-pressure slurry delivery pipes (3-2) is four, and the number of the bearings (5) is three.

6. A leak-proof device for treating tunnel leaks, characterized in that: The automatic spraying device according to any one of claims 1 to 5 further comprises a support protection system, wherein the support protection system comprises: A large alloy sleeve (8), the large alloy sleeve (8) being arranged outside the medium alloy sleeve (7); a plurality of automatically resilient triangular baffles (13) are hingedly connected to the inner wall of the large alloy sleeve (8); in an initial state, the plurality of triangular baffles (13) can cover the passage of the large alloy sleeve (8) to form a circular closed structure; A support sleeve (9), wherein the support sleeve (9) is arranged outside the large alloy sleeve (8), and four support rods (10) are hinged on the outer wall of the upper end of the support sleeve (9), and the support rods (10) can only rotate outwards; An outer shell (15) is arranged outside the supporting sleeve (9), and a plurality of rubber strips (17) corresponding to the support rod (10) are circumferentially extended from the upper end of the outer shell (15).

7. The device for plugging tunnel leaks according to claim 6, characterized in that: The inner wall of the large alloy sleeve (8) is fixedly provided with a first telescopic support top plate (14) that can be telescoped toward the inside of the large alloy sleeve (8), and the outer wall of the large alloy sleeve (8) is fixedly provided with a second telescopic support top plate that can be telescoped toward the outside of the large alloy sleeve (8), and both the first telescopic support top plate (14) and the second telescopic support top plate adopt an electric telescopic cylinder structure.

8. The device for plugging tunnel leaks according to claim 6, characterized in that: The upper supportable part of the outer shell (15) is entirely made of high-strength rubber, an alloy inner core is arranged inside the lower part, and the outside is wrapped with high-strength rubber.

9. The tunnel leak plugging device according to claim 6, characterized in that: The outer wall of the large alloy sleeve (8) is provided with a plurality of grooves (11), and the inner wall of the support sleeve (9) is correspondingly provided with a plurality of clamping strips (12) slidably connected to the plurality of grooves (11), and the support sleeve (9) can be moved forward by a jack.

10. A method for plugging tunnel leaks using the plugging equipment described in any one of claims 6 to 9, characterized in that: The construction steps include: a) Treat the hole, remove the gravel and polish it, install the rotary spraying system into the support protection system, open the first retractable support top plate (14) that is retracted toward the inner wall of the large alloy sleeve (8), and fix the rotary spraying system; install the outer shell (15) and the four support rods (10) on the support sleeve (9), and insert the installed support protection system into the treated hole; b) connecting the conveying device to the junction pipe (6); c) starting the first driving mechanism and the second driving mechanism to rotate the small alloy sleeve (4) and the mud cutting blade (2), and at the same time using a jack to support the support sleeve (9) so that the support sleeve (9) moves along the clamping strip (12) to the outside of the hole, and four support rods (10) open the upper rubber strip (17) of the outer shell (15). When the support sleeve (9) reaches the top, the second retractable support top plate of the large alloy sleeve (8) is opened to retract outward, and the support sleeve (9) is dragged, and the jack is removed to prevent it from moving; d) starting the conveying device, stirring and mixing the raw materials, and then conveying them to the confluence pipe (6) through a one-way high-pressure pump, and starting the first high-pressure nozzle (1-1) and the second high-pressure nozzle (1-2) to perform rotary spraying; e) after reaching the set grouting limit, closing the first driving mechanism and the second driving mechanism, so that the small alloy sleeve (4) and the mud cutting blade (2) stop rotating; f) closing the first retractable support top plate (14) of the large alloy sleeve (8) that is retracted toward the inner wall, and at the same time slowly withdrawing the rotary spraying system, and when the rotary spraying system is lowered below the triangular baffles (13), all the triangular baffles (13) fall down to seal the passage, and the conveying device is closed; g) After the rotary shotcrete system is completely withdrawn, a high-strength rubber plug (18) is inserted into the support and protection system to seal the bottom.

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