Grouting equipment for tunnel construction

Abstract

The present invention relates to the technical field of grouting equipment for tunnel construction, and specifically to a grouting equipment for tunnel construction, comprising a mobile frame, a mixing barrel and a storage barrel respectively fixedly mounted on the mobile frame, the mixing barrel and the storage barrel being connected through a conduit, a pump body being mounted on the side of the storage barrel, and a connecting pipe being mounted on the discharge end of the pump body, the connecting pipe and the grouting pipe being detachably connected, and each section of the grouting pipe being sealed and connected to each other through a heating and sealing assembly; the heating and sealing assembly connected to each grouting pipe of the present invention heats the inside of the grouting pipe to prevent the concrete slurry from freezing and solidifying in the longer grouting pipe due to the excessively low temperature inside the tunnel, and at the same time, the heating and sealing assembly can seal and fix the connection parts of the two grouting pipes connected to each other, so as to prevent the concrete slurry of a certain pressure from being injected into the grouting pipe, causing the connection part of the grouting pipe to leak, thereby affecting the rapid and safe grouting operation of the grouting pipe.

Description

Technical Field

[0001] The invention relates to the technical field of grouting equipment for tunnel construction, in particular to grouting equipment for tunnel construction. Background Art

[0002] As we all know, grouting equipment for shield tunnel construction is an auxiliary device used for grouting construction in the tunnel during the tunnel construction process to facilitate tunnel construction and use safer. It has been widely used in the shield tunnel grouting construction process.

[0003] Since the arch surface height of the existing tunnel is relatively high, and the grouting equipment is mostly moved on the tunnel ground, it is necessary to set up a longer grouting pipe to insert the grouting nozzle into the grouting point position of the arch surface. However, most of the existing grouting pipes are integrally formed, and the tunnel space is relatively small. Therefore, it is not convenient to move the grouting equipment connected with the longer grouting pipe.

[0004] Even if the grouting pipe is arranged in sections, after the existing grouting pipes connected in sections are spliced ​​into a longer grouting pipe, due to the long length of the grouting pipe and the lack of insulation measures, when the grouting equipment is used in cold areas, it is easy to cause the concrete slurry to solidify and freeze in the grouting pipe, resulting in blockage of the grouting pipe, which not only affects the safe use of the grouting equipment, but also affects the grouting construction efficiency of the tunnel arch surface. Summary of the invention

[0005] The object of the present invention is to provide a grouting device for tunnel construction to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grouting equipment for tunnel construction, comprising a mobile frame, a pouring mechanism is arranged above the mobile frame, the pouring mechanism comprises a grouting pipe and a grouting nozzle, and the grouting pipe is arranged in sections, each section of the grouting pipe is sealed and connected to each other by a heating sealing assembly, and the end of the grouting pipe located at the last section is detachably connected to the grouting nozzle.

[0007] Furthermore, the heating sealing assembly includes a threaded sleeve, an externally threaded tube, a spiral heating wire, a sealing gasket and a metal heating rod. The threaded sleeve is rotatably installed on one end of the grouting pipe, and the externally threaded tube is fixedly connected to the other end of the grouting pipe. The threaded sleeve at one end of the grouting pipe is threadedly rotatably connected to the externally threaded tube fixed at the other end of the grouting pipe. A heating chamber is opened inside the grouting pipe, and a spiral heating wire is spirally wound inside the heating chamber. The inner ring wall and the outer ring wall of the spiral heating wire are respectively attached to the cavity wall of the heating chamber. A sealing gasket is provided on the outer end face of the threaded sleeve, and the sealing gasket is slidably sleeved with the externally threaded tube. A plurality of metal heating rods are inserted into the threaded sleeve in a horizontal circumferential direction, and the plurality of metal heating rods are connected to the spiral heating wire.

[0008] Furthermore, the outer walls on both sides of the sealing gasket are respectively connected to a first expansion ring and a second expansion ring, the outer wall of the threaded sleeve is provided with an annular groove, and the first expansion ring is slidably connected in the annular groove through a spring, the spring arranged in the annular groove is rotatably connected to the first expansion ring, the side wall of the grouting pipe located on one side of the external threaded pipe is provided with an annular positioning groove, and the inner wall of the annular positioning groove is provided with a threaded groove, and the second expansion ring is threadedly rotatably connected to the thread groove of the annular positioning groove.

[0009] Furthermore, the sealing gasket is made of elastic rubber material, and a compression chamber is provided inside the sealing gasket, and the compression chamber is filled with powdered pigment. An expansion chamber is provided inside the first expansion ring and the second expansion ring, and the expansion chamber is connected to the compression chamber.

[0010] Furthermore, the expansion chamber and the compression chamber are both filled with water-absorbing expansion balls, and the water-absorbing expansion balls are made of water-absorbing expansion rubber material, and a sealing mesh is attached to the outer ring wall of the compression chamber.

[0011] Furthermore, the casting mechanism also includes a mixing barrel, a storage barrel and a connecting pipe. The mixing barrel and the storage barrel are respectively fixedly installed on the mobile frame, and the mixing barrel is connected with the storage barrel through a conduit. A pump body is installed on the side of the storage barrel, and a connecting pipe is installed at the discharge end of the pump body. The connecting pipe is detachably connected to the grouting pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention has a detachable grouting pipe connected to the connecting pipe arranged at the front end of the storage barrel, and each section of the grouting pipe is connected by a heating sealing component. The construction personnel can control the heating sealing component connected to each grouting pipe through the controller on the mobile frame to heat the inside of the grouting pipe, so as to prevent the temperature inside the tunnel from being too low, causing the concrete slurry to freeze and solidify in the longer grouting pipe. At the same time, the heating sealing component can seal and fix the connecting parts of the two grouting pipes connected to each other, so as to prevent the injection of a certain pressure of concrete slurry into the grouting pipe, causing the connecting part of the grouting pipe to leak, thereby affecting the rapid and safe grouting operation of the grouting pipe.

[0014] 2. The present invention arranges a first expansion ring and a second expansion ring on both sides of the sealing gasket. The construction personnel can first rotate the sealing gasket so that the second expansion ring can be rotatably threaded into the annular positioning groove, and the first expansion ring located in the annular groove will slide to the outside of the annular groove. The construction personnel then continue to rotate the threaded sleeve to squeeze and fix the sealing gasket, thereby improving the stability of the sealing gasket on the external threaded pipe. Compared with the existing method of directly sleeve-connecting the sealing gasket on the external threaded pipe, the present application directly threadably connects the sealing gasket to the end face of another grouting pipe through the second expansion ring, which can effectively improve the stability of the connection between the two adjacent grouting pipes of the sealing gasket, thereby improving the stable sealing effect of the sealing gasket between the two adjacent grouting pipes, and the sealing gasket threadedly connected to the end face of the grouting pipe can play a role of secondary connection and fixation for the two adjacent grouting pipes, thereby improving the stability and firmness of the connection between the two adjacent grouting pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a structural diagram of the grouting pipe of the present invention;

[0017] Figure 3 It is a cross-sectional view of the grouting pipe of the present invention;

[0018] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle.

[0019] In the figure: 1. Mobile frame; 2. Casting mechanism; 21. Grouting pipe; 211. Heating chamber; 212. Annular positioning groove; 22. Grouting nozzle; 23. Mixing barrel; 24. Storage barrel; 25. Connecting pipe; 3. Heating sealing assembly; 31. Threaded sleeve; 311. Annular groove; 32. Externally threaded pipe; 33. Spiral heating wire; 34. Sealing gasket; 341. Compression chamber; 35. Metal heating rod; 4. First expansion ring; 5. Second expansion ring; 51. Expansion chamber; 6. Water absorption expansion ball. DETAILED DESCRIPTION

[0020] 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.

[0021] Embodiment 1:

[0022] like Figures 1 to 4As shown, the present invention provides a technical solution of grouting equipment for tunnel construction: a grouting equipment for tunnel construction, comprising a mobile frame 1, a pouring mechanism 2 is arranged above the mobile frame 1, the pouring mechanism 2 comprises a grouting pipe 21 and a grouting nozzle 22, and the grouting pipe 21 is arranged in sections, each section of the grouting pipe 21 is sealed and connected to each other through a heating sealing component 3, and the end of the grouting pipe 21 located at the end section is detachably connected with the grouting nozzle 22; when working, when it is necessary to use the grouting equipment to perform grouting construction on the arch surface inside the tunnel, since the arch surface height of the existing tunnel is relatively high, and the grouting equipment is mostly moved on the tunnel ground, it is necessary to set A longer grouting pipe 21 is arranged to insert the grouting nozzle 22 into the grouting point position of the arch surface. However, the existing grouting pipes 21 are mostly integrally formed, and the tunnel space is relatively narrow. Therefore, it is not convenient to move the grouting equipment connected with the longer grouting pipe 21. Even if the grouting pipe 21 is arranged in sections, the existing grouting pipes 21 connected in sections are spliced ​​into a longer grouting pipe 21. Since the grouting pipe 21 is long and has no insulation measures, when the grouting equipment is used in cold areas, it is easy to cause the concrete slurry to solidify and freeze in the grouting pipe 21, resulting in the clogging of the grouting pipe 21, which not only affects the safe use of the grouting equipment, but also affects the safety of the grouting equipment. , and it will also affect the grouting construction efficiency of the tunnel arch surface; therefore, the grouting pipe 21 is detachably connected to the connecting pipe 25 arranged at the front end of the storage barrel 24 designed by the present invention, and each section of the grouting pipe 21 is connected by a heating and sealing component 3, so that when the grouting equipment designed by the present invention moves in the tunnel, each section of the grouting pipe 21 can be placed on the mobile frame 1 to follow the synchronous movement. When the grouting equipment moves to the predetermined position, the construction personnel splice the grouting pipes 21 with each other in sequence through the heating and sealing component 3, and then connect the front end of the spliced ​​grouting pipes 21 with the grouting nozzle 22, and then insert the grouting nozzle into the corresponding grouting point position. 24 When concrete slurry of a certain pressure is introduced into the spliced ​​grouting pipes 21 through the pump body, the construction personnel can control the heating and sealing components 3 connected to each grouting pipe 21 through the controller on the mobile frame 1 to heat the inside of the grouting pipe 21 to prevent the concrete slurry from freezing and solidifying in the longer grouting pipe 21 due to the low temperature inside the tunnel. At the same time, the heating and sealing components 3 can seal and fix the connection parts of the two grouting pipes 21 connected to each other, so as to prevent the injection of concrete slurry of a certain pressure into the grouting pipe 21, causing the connection parts of the grouting pipe 21 to leak, thereby affecting the rapid and safe grouting operation of the grouting pipe 21.

[0023] like Figure 2 and Figure 3As shown, the heating sealing assembly 3 includes a threaded sleeve 31, an externally threaded tube 32, a spiral heating wire 33, a sealing gasket 34 and a metal heating rod 35. The threaded sleeve 31 is rotatably installed on one end of the grouting pipe 21, and the externally threaded tube 32 is fixedly connected to the other end of the grouting pipe 21. The threaded sleeve 31 at one end of the grouting pipe 21 is threadedly rotatably connected to the externally threaded tube 32 fixed at the end of the other grouting pipe 21. A heating chamber 211 is provided inside the grouting pipe 21, and a spiral heating wire 33 is spirally wound inside the heating chamber 211. The inner ring wall and the outer ring wall of the spiral heating wire 33 are respectively attached to the cavity wall of the heating chamber 211. A sealing gasket 34 is provided on the outer end face of the threaded sleeve 31, and the sealing gasket 34 and the externally threaded tube 33 are sealed. 2 sliding sleeve setting, the threaded sleeve 31 has multiple metal electric heating rods 35 inserted in the horizontal circumferential direction inside, and the multiple metal electric heating rods 35 are connected to the spiral electric heating wire 33; during operation, when it is necessary to connect two adjacent grouting pipes 21, the construction personnel need to firstly connect the threaded sleeve 31 at the end of one grouting pipe 21 to the external threaded pipe 32 of the connector by thread rotation, and then connect the threaded sleeve 31 at the end of the other grouting pipe 21 to the external threaded pipe 32 at the end of the grouting pipe 21 that has been connected to the connecting pipe 25 by thread rotation. When the threaded sleeve 31 is threadedly sleeved on the external threaded pipe 32, the sealing gasket 34 will also be synchronously sleeved on the external threaded pipe 32. When the threaded sleeve 31 is completely threadedly connected to the external threaded pipe 32, the sealing gasket 34 will be synchronously sleeved on the external threaded pipe 32. When the sealing gasket 34 is pressed and sealed to the ends of the two adjacent grouting pipes 21, it can seal the two adjacent grouting pipes 21. After the multiple grouting pipes 21 are connected in the above manner, the construction personnel can first control the spiral heating wire 33 spirally wound inside the grouting pipe 21 through the controller, so that it generates heat to heat the inside of the grouting pipe 21 when it is powered on, so that when the concrete slurry flows in the longer grouting pipe 21, it will not freeze and solidify due to the low external temperature. The spiral heating wire 33 is laid in the grouting pipe 21 in a spirally wound manner, and the spiral heating wire 33 is made of elastic technical material, so that the spiral heating wire 33 will not affect the bending deformation of the grouting pipes 21 after being connected to each other. , and the inner wall and outer wall of the spiral heating wire 33 are respectively fitted with the heating chamber 211, which can improve the strength of the grouting pipe 21, so that the grouting pipe 21 will not explode due to the opening of the heating chamber 21 when injecting concrete slurry of a certain pressure; and a plurality of metal heating rods 35 are inserted and arranged inside the threaded sleeve 31, so that the metal heating rods 35 can also heat the connection between two adjacent grouting pipes 21 when powered on, so as to prevent the connection between the grouting pipes 21 from being blocked due to the long heating effect; when the grouting pipes 21 need to be plugged in, the construction personnel rotate the threaded sleeve 31 in reverse order, so that the threaded sleeve 31 and the external threaded pipe 32 are disconnected from the threaded connection, so as to facilitate the disassembly, storage or maintenance and replacement of the two grouting pipes 21.

[0024] like Figure 3 and Figure 4 As shown, the outer walls of both sides of the sealing gasket 34 are respectively connected with the first expansion ring 4 and the second expansion ring 5, the outer wall of the threaded sleeve 31 is provided with an annular groove 311, and the first expansion ring 4 is slidably connected in the annular groove 311 through a spring, the spring arranged in the annular groove 311 is rotatably connected with the first expansion ring 4, the side wall of the grouting pipe 21 located on one side of the external threaded pipe 32 is provided with an annular positioning groove 212, and the inner wall of the annular positioning groove 212 is provided with a threaded groove, and the second expansion ring 5 is threadedly rotatably connected with the threaded groove of the annular positioning groove 212; during operation, when it is needed When two adjacent grouting pipes 21 are to be connected, the construction personnel rotate the threaded sleeve 31 of one grouting pipe 21 to connect the threaded sleeve 31 to the external threaded pipe 32 of the other already connected grouting pipe 21. When the second expansion ring 5 on the side of the sealing gasket 34 arranged by rotating the end face of the threaded sleeve 31 is aligned with the annular positioning groove 212 opened on the outer wall of the other grouting pipe 21, the construction personnel can rotate the sealing gasket 34 first, so that the second expansion ring 5 can be rotated and threadedly connected to the annular positioning groove 212, and the first expansion ring 4 located in the annular groove 311 will move toward the annular groove 312. 11 slides outside, at this time the spring is in a stretched state, when the second expansion ring 5 is completely threadedly connected to the annular positioning groove 212, the construction personnel continue to rotate the threaded sleeve 31, so that the threaded sleeve 31 continues to move on the external threaded tube 32, and the continued movement of the threaded sleeve 31 will squeeze the sealing gasket 34, at this time, the spring stretched in the annular groove 311 will produce elastic recovery, and as the threaded sleeve 31 continues to move, the sealing gasket 34 will also be squeezed and fixed, thereby improving the stability of the sealing gasket 34 on the external threaded tube 32. Compared with the existing method of sealing the sealing gasket 34 on the external threaded tube 32, The sealing gasket 34 is directly sleeved on the external threaded pipe 32. In the present application, the sealing gasket 34 is directly threadedly connected to the end face of another grouting pipe 21 through the second expansion ring 5, which can effectively improve the stability of the connection between the two adjacent grouting pipes 21 of the sealing gasket 34, thereby improving the stable sealing effect of the sealing gasket 34 between the two adjacent grouting pipes 21, and the sealing gasket 34 threadedly connected to the end face of the grouting pipe 21 can play a role of secondary connection and fixation for the two adjacent grouting pipes 21, thereby improving the stability and firmness of the connection between the two adjacent grouting pipes 21.

[0025] like Figure 4As shown, the sealing gasket 34 is made of elastic rubber material, and a compression chamber 341 is opened inside the sealing gasket 34, and the compression chamber 341 is filled with powdered pigment. The first expansion ring 4 and the second expansion ring 5 are both opened inside expansion chambers 51, and the expansion chamber 51 is connected to the compression chamber 341; during operation, when the threaded sleeve 31 continues to rotate and the threaded sleeve 31 is connected to the external threaded tube 32, the movement of the threaded sleeve 31 will first cause the stretched spring in the annular groove 311 to recover, and when the threaded sleeve 31 continues to rotate, it will squeeze the sealing gasket 34, and the gas in the compression chamber 341 inside the sealing gasket 34 will move toward the expansion chamber 51 opened inside the first expansion ring 4 and the second expansion ring 5, so that the first expansion ring 4 and the second expansion ring 5 are respectively It will expand in the annular groove 311 and the annular positioning groove 212. The expansion of the first expansion ring 4 in the annular groove 311 will compress the internal spring and make it fit tightly in the annular groove 311, and the expansion of the second expansion ring 5 in the annular positioning groove 212 will increase the strength of the second expansion ring 5, thereby improving the stability of the threaded connection between the second expansion ring 5 and the annular positioning groove 212; and powder pigment is filled in the compression chamber 341. When the sealing gasket 34 is damaged after long-term use, the powder pigment in the compression chamber 341 will penetrate into the outer wall of the sealing gasket 34 under the outward push of the gasket inside the expansion chamber 51, thereby serving as a warning to the damaged sealing gasket 34, so that the construction personnel can repair or replace the damaged sealing gasket 34 in time.

[0026] like Figure 4 As shown, the expansion chamber 51 and the compression chamber 341 are both filled with water-absorbing expansion balls 6, and the water-absorbing expansion balls 6 are made of water-absorbing expansion rubber material, and the outer ring cavity wall of the compression chamber 341 is attached with a sealing mesh; during operation, the grouting pipe 21 is connected and rubbed on the ground due to the carelessness of the construction workers when in use, which may cause the sealing gasket 34 to be worn or damaged. When the grouting pipes 21 connected to each other are undergoing grouting operations, the construction workers find that the sealing gasket 34 at the connection between two adjacent grouting pipes 21 is in a damaged state, resulting in red or other colored powder appearing on the surface of the sealing gasket 34. Since the grouting pipes 21 are undergoing grouting operations, the sealing gasket 34 may be damaged. grouting operation, therefore, the construction workers do not have time to stop grouting to replace the sealing gasket 34 at that location. Therefore, the construction workers can use a syringe to quickly inject a small amount of diluted concrete slurry into the compression chamber 341 of the damaged part of the sealing gasket 34. When the diluted concrete slurry enters the compression chamber 341, it will contact the water-absorbing and expanding ball 6, so that the water-absorbing and expanding ball 6 will expand in the expansion chamber 51 and the compression chamber 341. The expansion of the water-absorbing and expanding ball 6 will block and seal the damaged part of the sealing gasket 34, and at the same time, it will also increase the hardness of the sealing gasket 34, so that the sealing gasket 34 can be used normally in the future, and it is also convenient to disassemble and replace the sealing gasket 34.

[0027] like Figure 1 As shown, the pouring mechanism 2 also includes a mixing barrel 23, a storage barrel 24 and a connecting pipe 25, the mixing barrel 23 and the storage barrel 24 are respectively fixedly installed on the mobile frame 1, and the mixing barrel 23 is connected to the storage barrel 24 through a conduit, a pump body is installed on the side of the storage barrel 24, and a connecting pipe 25 is installed at the discharge end of the pump body, and the connecting pipe 25 is detachably connected to the grouting pipe 21; during operation, when it is necessary to use grouting equipment to perform grouting operations on the arch surface of the tunnel, at this time, the construction personnel are required to push the grouting equipment to the position to be grouting, and then inject a certain amount of concrete slurry and other mixtures into the mixing barrel 23 for mixing operations, and then send the stirred concrete slurry into the storage barrel 24, and pass the concrete slurry into the grouting pipes 21 connected to each other through the pump body connected to the storage barrel 24, so as to facilitate the grouting construction of the arch surface inside the tunnel.

[0028] Working principle: when it is necessary to use grouting equipment to perform grouting operations on the arch surface of the tunnel, the construction personnel need to first connect the threaded sleeve 31 at the end of one of the grouting pipes 21 to the external threaded pipe 32 of the connector, and then connect the threaded sleeve 31 at the end of the other grouting pipe 21 to the external threaded pipe 32 at the end of the grouting pipe 21 that is already connected to the connector. When the threaded sleeve 31 is threadedly connected to the external threaded pipe 32, the sealing gasket 34 will also be synchronously connected to the external threaded pipe 32. When the threaded sleeve 31 is completely threadedly connected to the external threaded pipe 32, the sealing gasket 34 will squeeze and seal to the ends of the two adjacent grouting pipes 21, so that they are opposite to each other. The two adjacent grouting pipes 21 play a sealing role. After multiple grouting pipes 21 are connected in the above manner, the construction personnel can first electrically connect and control the spiral heating wire 33 spirally wound inside the grouting pipe 21 through the controller, so that it generates heat to heat the inside of the grouting pipe 21 when it is powered on, and then push the grouting equipment to the position to be grouting, and then inject a certain amount of concrete slurry and other mixtures into the mixing barrel 23 for mixing, and then send the stirred concrete slurry into the storage barrel 24, and then pass the concrete slurry into the grouting pipes 21 connected to each other through the pump body connected to the storage barrel 24, so as to facilitate grouting construction on the arch surface inside the tunnel.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grouting device for tunnel construction, comprising a mobile frame (1), a pouring mechanism (2) being arranged above the mobile frame (1), characterized in that: The pouring mechanism (2) comprises a grouting pipe (21) and a grouting nozzle (22), and the grouting pipe (21) is arranged in sections, each section of the grouting pipe (21) is sealed and connected to each other via a heating sealing assembly (3), and the end of the grouting pipe (21) located at the last section is detachably connected to the grouting nozzle (22); The heating sealing assembly (3) comprises a threaded sleeve (31), an externally threaded pipe (32), a spiral heating wire (33), a sealing gasket (34) and a metal heating rod (35); the threaded sleeve (31) is rotatably mounted on one end of a grouting pipe (21); the externally threaded pipe (32) is fixedly connected to the other end of the grouting pipe (21); the threaded sleeve (31) at one end of the grouting pipe (21) is threadably rotatably connected to the externally threaded pipe (32) fixed at the end of another grouting pipe (21); and the grouting pipe (21) is provided with a A heating chamber (211) is provided, and a spiral heating wire (33) is spirally wound inside the heating chamber (211), the inner ring wall and the outer ring wall of the spiral heating wire (33) are respectively attached to the chamber wall of the heating chamber (211), a sealing gasket (34) is provided on the outer end surface of the threaded sleeve (31), and the sealing gasket (34) is slidably sleeved with the external threaded tube (32), a plurality of metal heating rods (35) are inserted into the interior of the threaded sleeve (31) in a horizontal circumferential direction, and the plurality of metal heating rods (35) are connected to the spiral heating wire (33).

2. A grouting equipment for tunnel construction according to claim 1, characterized in that: The outer walls on both sides of the sealing gasket (34) are respectively connected to a first expansion ring (4) and a second expansion ring (5); an annular groove (311) is provided on the outer wall of the threaded sleeve (31), and the first expansion ring (4) is slidably connected in the annular groove (311) via a spring; the spring arranged in the annular groove (311) is rotationally connected to the first expansion ring (4); an annular positioning groove (212) is provided on the side wall of the grouting pipe (21) located on one side of the external threaded pipe (32), and a thread groove is provided on the inner wall of the annular positioning groove (212); the second expansion ring (5) is threadedly rotationally connected to the thread groove of the annular positioning groove (212).

3. A grouting equipment for tunnel construction according to claim 2, characterized in that: The sealing gasket (34) is made of elastic rubber material, and a compression chamber (341) is provided inside the sealing gasket (34), and the compression chamber (341) is filled with powdered pigment. An expansion chamber (51) is provided inside the first expansion ring (4) and the second expansion ring (5), and the expansion chamber (51) is communicated with the compression chamber (341).

4. A grouting equipment for tunnel construction according to claim 3, characterized in that: The expansion chamber (51) and the compression chamber (341) are both filled with water-absorbing expansion balls (6), and the water-absorbing expansion balls (6) are made of water-absorbing expansion rubber material. A sealing mesh is attached to the outer ring cavity wall of the compression chamber (341).

5. The grouting equipment for tunnel construction according to claim 1, characterized in that: The pouring mechanism (2) further comprises a mixing barrel (23), a material storage barrel (24) and a connecting pipe (25); the mixing barrel (23) and the material storage barrel (24) are respectively fixedly mounted on the mobile frame (1), and the mixing barrel (23) and the material storage barrel (24) are connected via a conduit; a pump body is mounted on the side of the material storage barrel (24), and a connecting pipe (25) is mounted on the discharge end of the pump body; the connecting pipe (25) is detachably connected to the grouting pipe (21).

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