CN115288731A

CN115288731A - Tunnel supporting system

Info

Publication number: CN115288731A
Application number: CN202210770154.3A
Authority: CN
Inventors: 徐敦敏; 宋世兴; 水晶明; 王德龙; 张部伟; 徐金宇; 刘鹏波; 卢俊平; 苏文涛; 包义锴
Original assignee: Second Engineering Co Ltd of China Railway 25th Bureau Group Co Ltd
Current assignee: Second Engineering Co Ltd of China Railway 25th Bureau Group Co Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-04

Abstract

The application discloses a tunnel supporting system, which belongs to the technical field of tunnel supporting and comprises an arched steel frame and small grouting pipes, wherein a plurality of mounting holes are formed in the arched steel frame; a connecting block is fixedly connected to the small grouting guide pipe, a connecting groove is formed in the mounting seat, and the connecting block is in inserting fit with the connecting groove; the connecting block is provided with an accommodating groove, and the side wall of the accommodating groove is provided with a first through hole; the connecting block is also provided with a limiting assembly, the limiting assembly comprises a limiting block and a first spring, the limiting block is connected with the inner side wall of the first through hole in a sliding manner, and a limiting groove for the limiting block to be inserted and matched is formed in the inner side wall of the connecting groove; the one end of first spring and the inside wall fixed connection of holding tank, the other end and the stopper fixed connection of first spring.

Description

Tunnel supporting system

Technical Field

The application relates to the technical field of tunnel support, in particular to a tunnel supporting system.

Background

In the process of opening the tunnel, an arch steel frame is usually required to be added in the tunnel to support the tunnel, and meanwhile, a connection reinforcing mesh is installed between the supporting steel plates to enhance the connection stability between the supporting steel plates in the tunnel. Meanwhile, a plurality of pre-buried holes are formed in the wall body of the tunnel, a plurality of mounting holes are formed in the arched steel frame corresponding to the pre-buried holes, small grouting pipes penetrate through the mounting holes and are fixed to the arched steel frame in a welded mode, the small grouting pipes are partially located in the pre-buried holes in the tunnel, and a plurality of grouting holes are formed in the small grouting pipes. And then sealing the end part of the pre-buried hole, and then introducing cement into the small grouting guide pipe at a high pressure through a high-pressure pump so as to enhance the stability of the small grouting guide pipe installed in the tunnel.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the process of welding and installing the small grouting guide pipes, on one hand, the stability of installation of the small grouting guide pipes needs to be kept, and on the other hand, the small grouting guide pipes need to be held by workers for a long time, so that the difficulty of fixing the small grouting guide pipes is high.

Disclosure of Invention

In order to facilitate the fixed slip casting ductule, this application provides a tunnel braced system.

The application provides a tunnel support system adopts following technical scheme:

a tunnel supporting system comprises an arched steel frame and small grouting pipes, wherein a plurality of mounting holes are formed in the arched steel frame, the small grouting pipes penetrate through the mounting holes one by one, a plurality of mounting seats are fixedly connected to the arched steel frame corresponding to the mounting holes, and the small grouting pipes penetrate through the mounting seats;

the small grouting guide pipe is fixedly connected with a connecting block, the mounting seat is provided with a connecting groove, and the connecting block is in inserted fit with the connecting groove; the connecting block is provided with an accommodating groove, and the side wall of the accommodating groove is provided with a first through hole;

the connecting block is also provided with a limiting assembly, the limiting assembly comprises a limiting block and a first spring, the limiting block is connected with the inner side wall of the first through hole in a sliding mode, and a limiting groove for the limiting block to be in inserting fit with is formed in the inner side wall of the connecting groove; the one end of first spring with the inside wall fixed connection of holding tank, the other end of first spring with stopper fixed connection.

By adopting the technical scheme, in order to fix the small grouting guide pipe on the arched steel frame, in the process of moving the small grouting guide pipe to penetrate through the mounting hole on the arched steel frame, the small grouting guide pipe drives the connecting block to move, so that the connecting block is inserted into the connecting groove; in the process of the connecting block being inserted into the connecting groove, the limiting block is pushed to slide into the accommodating groove, when the first through hole is aligned with the limiting groove, the limiting block is pushed to be inserted into the limiting groove under the elastic action of the first spring, and therefore the purpose of fixing the connecting block and the small grouting guide pipe conveniently is achieved.

Preferably, an inclined plane is arranged on one side, away from the small grouting guide pipe, of the limiting block.

Through adopting above-mentioned technical scheme, peg graft in the in-process of spread groove at the connecting block, the inclined plane of spacing groove can contact with the lateral wall of spread groove to make the lateral wall of spread groove can promote the stopper and remove, and then reduced the degree of difficulty that the connecting block was pegged graft in the spread groove.

Preferably, a sliding groove is further formed in the connecting block and communicated with the accommodating groove; a first strip-shaped hole is formed in the inner side wall of the sliding chute, a second strip-shaped hole is formed in the small grouting guide pipe, and the first strip-shaped hole is communicated with the second strip-shaped hole;

the small grouting guide pipe is also internally provided with a pushing mechanism, the pushing mechanism comprises a connecting handle, a rotating buckle and a pushing block, and the pushing block is in sliding connection with the inner side wall of the sliding groove; inclined planes are arranged on the sides, close to each other, of the pushing block and the limiting block, and the inclined planes of the pushing block are matched with the inclined planes of the limiting block;

the connecting handle is arranged in the first strip-shaped hole and the second strip-shaped hole in a penetrating mode, one end of the connecting handle is fixedly connected with the pushing block, and the other end of the connecting handle is fixedly connected with the rotating buckle; the pushing mechanism further comprises a driving assembly used for driving the rotating buckle to move.

By adopting the technical scheme, after the limiting block is inserted into the limiting groove, the driving assembly can drive the rotating buckle to move, the rotating buckle moves to drive the connecting handle to move, and the connecting handle moves to drive the pushing block to move; in the process of moving the pushing block, the pushing block can push the limiting block to move under the interaction of the inclined surface of the pushing block and the inclined surface of the limiting block; in the process of pushing the limiting block to move, the limiting block can be abutted against the inner side wall of the limiting groove, so that the stability of the connecting block after being inserted into the connecting groove can be enhanced, and the stability of the grouting small guide pipe arranged on the arched steel frame can be further improved.

Preferably, the pushing block is fixedly connected with a ratchet strip, the inner side wall of the sliding groove is fixedly connected with an elastic sheet, and the elastic sheet is matched with the ratchet strip.

By adopting the technical scheme, in the moving process of the pushing block, under the action of the elastic sheet and the ratchet strip, the possibility that the pushing block moves to one side far away from the limiting block is reduced.

Preferably, the driving assembly comprises a rotating ring and a plurality of propeller blades, and the rotating ring is in threaded connection with the inner wall of the small grouting guide pipe; the plurality of propeller blades are fixedly connected with the inner circumferential surface of the rotating ring, and the rotating buckle is installed on the rotating ring.

Through adopting above-mentioned technical scheme, when high pressure pours into cement into to the little pipe of slip casting into, the cement that flows can promote a plurality of propeller blades and rotate, and propeller blade rotates and drives the swivel becket rotation, and swivel becket pivoted in-process is owing to the inner wall threaded connection of swivel becket and the little pipe of slip casting to make the swivel becket can drive to rotate and detain the axial displacement along the little pipe of slip casting.

Preferably, a plurality of grouting holes are formed in the small grouting guide pipe, a reinforcing pipe penetrates through each grouting hole, and a driving mechanism used for driving the reinforcing pipes to move is further arranged in the small grouting guide pipe.

Through adopting above-mentioned technical scheme, utilize a plurality of reinforcement pipes, can further strengthen the joint strength between slip casting ductule and the tunnel wall.

Preferably, the driving mechanism comprises a pushing ring, a driving rod and a pushing plate, a guide rod is fixed on the small grouting pipe, the pushing plate is connected with the guide rod in a sliding manner, and the reinforcing pipes are all fixedly connected with the pushing plate; the pushing plate is provided with a plurality of second through holes, and the reinforcing pipes are communicated with the second through holes in a one-to-one correspondence manner;

one end of the driving rod is hinged to the pushing plate, the other end of the driving rod is hinged to the pushing ring, and the driving mechanism further comprises a moving assembly used for pushing the pushing ring to move.

Through adopting above-mentioned technical scheme, for the ease of promoting a plurality of reinforcement pipes simultaneously and removing, remove through removing a plurality of propelling movement rings of subassembly drive earlier, the in-process that the propelling movement ring removed can promote the actuating lever and remove, and the actuating lever removes and can promote the slurcam and remove to make the slurcam can promote a plurality of reinforcement pipes and remove. .

Preferably, the moving assembly comprises a threaded rod and a mounting ring, the mounting ring is simultaneously and fixedly connected with the plurality of propeller blades, and the threaded rod is fixedly connected with the mounting ring; the threaded rod is in threaded connection with the push ring.

Through adopting above-mentioned technical scheme, when pouring into cement into the little pipe of slip casting through the high pressure, a plurality of propeller blades can also drive the collar tie and rotate, and the collar tie rotates and drives the threaded rod and rotate, and the threaded rod rotates the drive and promotes the collar tie and remove to reach the purpose of being convenient for drive and promote the collar tie and remove.

Preferably, a second spring is further arranged in the small grouting guide pipe corresponding to each pushing plate, one end of the second spring is fixedly connected to the inner side wall of the small grouting guide pipe, and the other end of the second spring is fixedly connected to the pushing plate.

Through adopting above-mentioned technical scheme, utilize the second spring, be convenient for make the sluicing board reset, reduce simultaneously when not using the little pipe of slip casting, the possibility that the reinforcement pipe removed to the little pipe outside of slip casting.

Preferably, the end of the reinforcing pipe is hinged with a sealing cover plate.

Through adopting above-mentioned technical scheme, utilize sealed lid, reduce and promote the in-process that the reinforced pipe removed, the possibility that the reinforced pipe takes place to block up.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in order to fix the small grouting guide pipe on the arched steel frame conveniently, in the process of moving the small grouting guide pipe to penetrate through the mounting hole on the arched steel frame, the small grouting guide pipe drives the connecting block to move, so that the connecting block is inserted into the connecting groove; in the process that the connecting block is inserted into the connecting groove, the limiting block is pushed to slide into the accommodating groove, and when the first through hole is aligned with the limiting groove, the limiting block is pushed to be inserted into the limiting groove under the action of the elastic force of the first spring, so that the purpose of fixing the connecting block and the small grouting guide pipe conveniently is achieved;

2. when cement is injected into the small grouting guide pipe at high pressure, the flowing cement can push the plurality of propeller blades to rotate, the propeller blades rotate to drive the rotating ring to rotate, and in the rotating process of the rotating ring, the rotating ring is in threaded connection with the inner wall of the small grouting guide pipe, so that the rotating ring can drive the rotating buckle to move along the axial direction of the small grouting guide pipe;

3. when cement is injected into the small grouting guide pipe through high pressure, the plurality of propeller blades can also drive the mounting ring to rotate, the mounting ring rotates to drive the threaded rod to rotate, and the threaded rod rotates to drive the pushing ring to move, so that the aim of driving the pushing ring to move conveniently is fulfilled.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the matching of the grouting small conduit and the arched steel plate in the embodiment of the application.

FIG. 3 is a cross-sectional view of a mount and connection block in an embodiment of the present application.

Fig. 4 is a sectional view of a connecting block and a small grouting pipe in an embodiment of the present application.

Fig. 5 is an enlarged view of a point a in fig. 4.

FIG. 6 is a schematic view showing the structure of the driving mechanism in the embodiment of the present application.

Description of the reference numerals: 1. an arched steel frame; 2. a mounting seat; 21. connecting grooves; 22. a limiting groove; 3. grouting a small conduit; 31; grouting holes; 32. a second bar-shaped hole; 4. connecting blocks; 41. accommodating a tank; 42. a first through hole; 43. a chute; 44. a first strip-shaped hole; 5. a limiting component; 51. a limiting block; 52. a first spring; 53. a moving block; 6. a pushing mechanism; 61. a connecting handle; 62. rotating the buckle; 63. a pushing block; 64. a ratchet bar; 65. an elastic sheet; 66. a drive assembly; 661. a rotating ring; 662. a propeller blade; 7. reinforcing the pipe; 71. a sealing cover; 8. a drive mechanism; 81. a guide rod; 811. a limiting plate; 82. a push ring; 83. a drive rod; 84. a push plate; 841. a second through hole; 842. a second spring; 85. a moving assembly; 851. a threaded rod; 852. and (7) installing a ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a tunnel supporting system. Referring to fig. 1, the tunnel supporting system comprises arched steel frames 1 and grouting small ducts 3, and a reinforcing mesh is installed between the two arched steel frames 1 for enhancing the stability of installation between the plurality of arched steel frames 1. Wherein, seted up a plurality of pre-buried holes on the wall body in tunnel, seted up a plurality of mounting holes on arch steelframe 1 corresponding a plurality of pre-buried holes, the mounting hole is located in wearing to locate of little pipe 3 of slip casting, and the part of little pipe 3 of slip casting is located the pre-buried hole.

As shown in fig. 2 and 3, a mounting seat 2 is fixedly connected to the arched steel frame 1 corresponding to each grouting small duct 3, and the grouting small duct 3 is arranged to penetrate through the mounting seat 2. The small grouting guide pipe 3 is sleeved with a connecting block 4, and the connecting block 4 is fixedly connected with the small grouting guide pipe 3. The mounting base 2 is provided with a connecting groove 21, and the connecting block 4 is in inserting fit with the connecting groove 21.

As shown in fig. 3 and 4, two sets of limiting assemblies 5 are further arranged in the connecting block 4, an accommodating groove 41 is formed in the connecting block 4 corresponding to each set of limiting assemblies 5, and a first through hole 42 is formed in the side wall of the accommodating groove 41. The limiting assembly 5 comprises a limiting block 51, a first spring 52 and a moving block 53, the limiting block 51 is connected with the inner side wall of the first through hole 42 in a sliding mode, a limiting groove 22 for the limiting block 51 to be connected in an inserting mode is formed in the side wall of the connecting groove 21, and an inclined plane is arranged on one side, away from the grouting small guide pipe 3, of the limiting block 51. The moving block 53 is fixedly connected to the limiting block 51, one end of the first spring 52 is fixedly connected to the inner sidewall of the accommodating groove 41, and the other end of the first spring 52 is fixedly connected to the moving block 53.

In the process of pushing the small grouting pipe 3 to penetrate through the mounting hole, the small grouting pipe 3 can drive the connecting block 4 to be inserted into the connecting groove 21. In the process of connecting block 4 being inserted into connecting groove 21, the side wall of connecting groove 21 can contact with the inclined planes of two limiting blocks 51, so that the side wall of connecting groove 21 can push the ends of two limiting blocks 51 into two first through holes 42 respectively, so that connecting block 4 can be inserted into connecting groove 21.

When the two first through holes 42 are respectively aligned with the two limiting grooves 22, under the action of the elastic force of the two first springs 52, one side of the two moving blocks 53 away from each other can be pushed to move, the two moving blocks 53 move to drive the two limiting blocks 51 to move, so that the two limiting blocks 51 are respectively inserted into the two limiting grooves 22, and the purpose of fixing the connecting block 4 is achieved.

As shown in fig. 4 and 5, still be provided with two sets of pushing mechanism 6 in the connecting block 4, two sets of pushing mechanism 6 and two stopper 51 one-to-one settings, correspond every pushing mechanism 6 of group and still seted up spout 43 in connecting block 4, spout 43 is linked together with the holding tank 41 that corresponds, first bar hole 44 has still been seted up on the lateral wall of spout 43, two second bar holes 32 have still been seted up on slip casting tubule 3, two first bar holes 44 are linked together with two second bar holes 32 one-to-one.

The pushing mechanism 6 comprises a pushing block 63, a connecting handle 61, a rotating buckle 62, a ratchet 64, an elastic sheet 65 and a driving assembly 66, the pushing block 63 is connected with the inner side wall of the sliding groove 43 in a sliding manner, inclined planes are arranged on the sides, close to each other, of the pushing block 63 and the limiting block 51, and the inclined planes, close to the limiting block 51, of the pushing block 63 are matched with the inclined planes, close to the pushing block 63, of the limiting block 51. Connect the one end fixed connection of handle 61 in promoting piece 63, connect the other end of handle 61 and rotate and detain 62 fixed connection, connect handle 61 and wear to locate first bar hole 44 and the setting of second bar hole 32, and connect the equal sliding connection of inside wall of handle 61 and first bar hole 44 and the inside wall of second bar hole 32.

The number of the ratchets 64 in each pushing mechanism 6 is two, the two ratchets 64 are integrally formed on the pushing block 63, and the two ratchets 64 are distributed on two opposite sides of the pushing block 63. The elastic pieces 65 are made of spring steel, the number of the elastic pieces 65 is two, the two elastic pieces 65 are fixedly connected to the side walls of the two opposite sides of the sliding groove 43 in a one-to-one correspondence mode, the two elastic pieces 65 are arranged in a downward inclined mode from one side, away from the axial lead of the pushing block 63, close to one side of the axial lead of the pushing block 63, and the two elastic pieces 65 are matched with the two ratchet bars 64 in a one-to-one correspondence mode.

As shown in fig. 4, the driving assembly 66 includes a rotating ring 661 and a plurality of propeller blades 662, the rotating ring 661 is located inside the grouting small duct 3, and the rotating ring 661 is threadedly connected to the inner sidewall of the grouting small duct 3. The two rotating buckles 62 are mounted on the rotating ring 661, and the rotating ring 661 can rotate relative to the two rotating buckles 62. The plurality of propeller blades 662 are fixedly coupled to an inner circumferential surface of the rotating ring 661, and the plurality of propeller blades 662 are uniformly distributed along a circumferential direction of the rotating ring 661.

When high pressure input cement to little pipe 3 of slip casting, the cement that flows can drive a plurality of propeller blades 662 and rotate, and propeller blades 662 rotates and drives swivel 661 to rotate, because swivel 661 and the inner wall threaded connection of little pipe 3 of slip casting now are owing to make swivel 661 can follow the axial displacement of little pipe 3 of slip casting. The rotating ring 661 moves axially along the grouting small duct 3 to drive the two rotating buckles 62 to move axially along the grouting small duct 3, the two rotating buckles 62 move axially along the grouting small duct 3 to drive the two connecting handles 61 to move, and the two connecting handles 61 move to drive the two pushing blocks 63 to move. In the process that the two pushing blocks 63 move, the two limiting blocks 51 are pushed to move under the action of the inclined planes of the pushing blocks 63 and the limiting blocks 51, so that the limiting blocks 51 are abutted against the side walls of the limiting grooves 22, and the stability of the connecting block 4 in the connecting groove 21 in an inserting mode is enhanced. The ratchet 64 and the elastic piece 65 reduce the possibility that the pushing block 63 moves away from the limiting block 51.

As shown in fig. 3 and fig. 6, a plurality of grouting holes 31 are formed in the grouting small conduit 3, a reinforcing pipe 7 penetrates through each grouting hole 31, the reinforcing pipe 7 is communicated with the inside of the grouting small conduit 3, and a plurality of driving mechanisms 8 for driving the reinforcing pipes 7 to move are arranged in the grouting small conduit 3. The end part of each reinforcing pipe 7 far away from the small grouting guide pipe 3 is hinged with a sealing cover 71, and a certain friction force exists between hinged shafts connected with the sealing covers 71 and the reinforcing pipes 7. By providing the sealing cover 71, the possibility of blocking the reinforcing pipe 7 during the movement of pushing the reinforcing pipe 7 can be reduced.

As shown in fig. 4 and 6, the driving mechanism 8 includes a pushing ring 82, a driving rod 83 and pushing plates 84, in this embodiment, there are four pushing plates 84 corresponding to each group of driving mechanisms 8, and four reinforcing pipes 7 are fixedly connected to each pushing plate 84, four second through holes 841 are formed in each pushing plate 84, the four second through holes 841 are in one-to-one correspondence with the four reinforcing pipes 7, and the reinforcing pipes 7 are communicated with the inside of the grouting small conduit 3 through the second through holes 841.

Correspond two guide bars 81 of every kickboard 84 fixedly connected with on the inside wall of slip casting ductule 3, two equal fixed connection of guide bar 81 are on the inside wall of slip casting ductule 3, kickboard 84 simultaneously with two guide bars 81 sliding connection, and two relative and equal slope settings of axial lead of slip casting ductule 3 of guide bar 81. The end of each guide rod 81 is fixedly connected with a stopper plate 811 for reducing the possibility that the push plate 84 is disengaged from the guide rod 81. Two second springs 842 are fixedly connected to the small grouting guide pipe 3 corresponding to each pushing plate 84, and the other ends of the two second springs 842 are fixedly connected to the pushing plates 84. The return of the push plate 84 and the reinforcement tube 7 can be facilitated by the second spring 841.

The number of the driving rods 83 is four, the end parts of the four driving rods 83 are correspondingly hinged with the four pushing plates 84, and the other ends of the four driving rods 83 are simultaneously hinged with the pushing ring 82. The small grouting pipe 3 is also provided with a moving assembly 85 which drives the plurality of pushing rings 82 to move simultaneously.

The moving assembly 85 includes a threaded rod 851 and a mounting ring 852, the mounting ring 852 being fixedly coupled to the plurality of propeller blades 662 at the same time, and an axis of the mounting ring 852 coinciding with an axis of the rotating ring 661. Threaded rod 851 is worn to locate the setting of collar 852, and threaded rod 851 and collar 852 fixed connection. Threaded rod 851 wears to locate a plurality of push rings 82 simultaneously and sets up, and threaded rod 851 and the equal threaded connection of a plurality of push rings 82.

When cement is injected into the small grouting pipe 3 at a high pressure, the flowing cement drives the propeller blades 662 to rotate, the propeller blades 662 rotate to drive the mounting ring 852 and the threaded rod 851 to rotate, the threaded rod 851 rotates to drive the pushing ring 82 to move, the pushing ring 82 moves to drive the plurality of driving rods 83 to move, and the driving rods 83 move to push the plurality of reinforcing pipes 7 to move, so that the aim of driving the plurality of reinforcing pipes 7 to move is fulfilled.

The implementation principle of the tunnel supporting system in the embodiment of the application is as follows: in order to fix the small grouting guide pipe 3 on the arched steel frame 1, in the process that the small grouting guide pipe 3 is moved to penetrate through the mounting hole in the arched steel frame 1, the small grouting guide pipe 3 drives the connecting block 4 to move, so that the connecting block 4 is inserted into the connecting groove 21; in the process of inserting the connecting block 4 into the connecting groove 21, the limiting block 51 is pushed to slide into the accommodating groove 41, and when the first through hole 42 is aligned with the limiting groove 22, the limiting block 51 is pushed to be inserted into the limiting groove 22 under the elastic action of the first spring 52, so that the aims of fixing the connecting block 4 and the grouting small pipe 3 are fulfilled.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a tunnel support system, includes arch steelframe (1) and slip casting tubule (3), a plurality of mounting hole (11) have been seted up on arch steelframe (1), and is a plurality of slip casting tubule (3) one-to-one wears to locate a plurality of mounting hole (11) set up, its characterized in that: a plurality of mounting seats (2) are fixedly connected to the arched steel frame (1) corresponding to the mounting holes (11), and the small grouting guide pipes (3) are arranged in the mounting seats (2) in a penetrating mode;

the small grouting guide pipe (3) is fixedly connected with a connecting block (4), the mounting seat (2) is provided with a connecting groove (21), and the connecting block (4) is in inserted fit with the connecting groove (21); an accommodating groove (41) is formed in the connecting block (4), and a first through hole (42) is formed in the side wall of the accommodating groove (41);

the connecting block (4) is further provided with a limiting assembly (5), the limiting assembly (5) comprises a limiting block (51) and a first spring (52), the limiting block (51) is connected with the inner side wall of the first through hole (42) in a sliding mode, and a limiting groove (22) for the limiting block (51) to be matched in an inserting mode is formed in the inner side wall of the connecting groove (21); one end of the first spring (52) is fixedly connected with the inner side wall of the accommodating groove (41), and the other end of the first spring (52) is fixedly connected with the limiting block (51).

2. A tunnel support system according to claim 1, wherein: and an inclined plane is arranged on one side of the limiting block (51) far away from the small grouting guide pipe (3).

3. A tunnel support system according to claim 1, wherein: a sliding groove (43) is further formed in the connecting block (4), and the sliding groove (43) is communicated with the accommodating groove (41); a first strip-shaped hole (44) is formed in the inner side wall of the sliding groove (43), a second strip-shaped hole (32) is formed in the small grouting guide pipe (3), and the first strip-shaped hole (44) is communicated with the second strip-shaped hole (32);

the small grouting conduit (3) is also internally provided with a pushing mechanism (6), the pushing mechanism (6) comprises a connecting handle (61), a rotating buckle (62) and a pushing block (63), and the pushing block (63) is in sliding connection with the inner side wall of the chute (43); inclined planes are arranged on the sides, close to each other, of the pushing block (63) and the limiting block (51), and the inclined planes of the pushing block (63) are matched with the inclined planes of the limiting block (51);

the connecting handle (61) penetrates through the first strip-shaped hole (44) and the second strip-shaped hole (32) at the same time, one end of the connecting handle (61) is fixedly connected with the pushing block (63), and the other end of the connecting handle (61) is fixedly connected with the rotating buckle (62); the pushing mechanism (6) further comprises a driving assembly (66) for driving the rotating buckle (62) to move.

4. A tunnel support system according to claim 3, wherein: the pushing block (63) is fixedly connected with a ratchet (64), the inner side wall of the sliding groove (43) is fixedly connected with an elastic sheet (65), and the elastic sheet (65) is matched with the ratchet (64).

5. A tunnel support system according to claim 3, wherein: the driving assembly (66) comprises a rotating ring (661) and a plurality of propeller blades (662), and the rotating ring (661) is in threaded connection with the inner wall of the grouting small conduit (3); the plurality of propeller blades (662) are fixedly connected with the inner circumferential surface of the rotating ring (661), and the rotating buckle (62) is mounted on the rotating ring (661).

6. A tunnel support system according to claim 5, wherein: the grouting small guide pipe (3) is provided with a plurality of grouting holes (31), each grouting hole (31) is provided with a reinforcing pipe (7) in a penetrating mode, and the grouting small guide pipe (3) is further provided with a driving mechanism (8) used for driving the reinforcing pipes (7) to move.

7. A tunnel support system according to claim 6, wherein: the driving mechanism (8) comprises a pushing ring (82), a driving rod (83) and a pushing plate (84), a guide rod (81) is fixed on the small grouting pipe (3), the pushing plate (84) is in sliding connection with the guide rod (81), and the reinforcing pipes (7) are all fixedly connected to the pushing plate (84); a plurality of second through holes (841) are formed in the pushing plate (84), and the reinforcing pipes (7) are communicated with the second through holes (841) in a one-to-one correspondence manner;

one end of the driving rod (83) is hinged to the pushing plate (84), the other end of the driving rod (83) is hinged to the pushing ring (82), and the driving mechanism (8) further comprises a moving assembly (85) used for pushing the pushing ring (82) to move.

8. A tunnel support system according to claim 7, wherein: said moving assembly (85) comprising a threaded rod (851) and a mounting ring (852), said mounting ring (852) being fixedly connected to a plurality of said propeller blades (662) simultaneously, said threaded rod (851) being fixedly connected to said mounting ring (852); the threaded rod (851) is in threaded connection with the push ring (82).

9. A tunnel support system according to claim 7, wherein: a second spring (842) is further arranged in the small grouting guide pipe (3) corresponding to each pushing plate (84), one end of the second spring (842) is fixedly connected to the inner side wall of the small grouting guide pipe (3), and the other end of the second spring (842) is fixedly connected to the pushing plate (84).

10. A tunnel support system according to claim 6, wherein: the end part of the reinforcing pipe (7) is hinged with a sealing cover (71) plate.