Perpendicular disturbance grouting vertical drilling and grouting all-in-one machine in subway tunnel hole and technological method

Abstract

The invention relates to the field of tunnel engineering, and discloses a vertical drilling and grouting all-in-one machine for micro-disturbance grouting in a subway tunnel hole and a technological method.The vertical drilling and grouting all-in-one machine comprises a base used for supporting the whole device, a sliding rail is installed on the inner wall of the base, and a supporting frame is installed at the end, close to the center line of the base, of the sliding rail; a drilling and injecting mechanism is arranged on the outer wall of the sliding rail, and a sealing assembly is arranged on the upper surface of the base. The drilling and injecting mechanism comprises a sliding frame, the sliding frame is slidably connected to the outer wall of the sliding rail, the front surface of the sliding frame is fixedly connected with a supporting plate, the lower surface of the supporting plate is rotatably connected with a drilling rod, and the lower end of the drilling rod is in threaded connection with a connector. According to the drilling and grouting device, the drilling and grouting mechanism is arranged, the hollow drill rod is adopted for drilling, during grouting operation, drilling operation can be achieved through rotation of the drill rod, then the drill rod can be directly connected with grouting equipment, and therefore grouting can be achieved through the drill rod directly.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering, and in particular to a vertical drilling and injection machine and process for micro-disturbance grouting inside subway tunnels. Background Technology

[0002] With the development of economic construction and the continuous increase in the operating mileage of subways, there are more and more construction projects near subways, and the scale of these projects is also getting larger and larger. This inevitably causes significant deformation of subway tunnels. In recent years, the micro-disturbance grouting method has become an important means of repairing subway tunnel deformation due to its small impact on the surrounding environment, strong controllability, and good reinforcement effect.

[0003] Currently used grouting methods include compaction grouting, jet grouting, and fracturing grouting. Although their construction methods differ, they all only specify the grouting volume and grouting pressure among the grouting parameters, without paying attention to the fine control of the grouting process. This may be sufficient for good geological or environmental conditions. Moreover, the selection of hole locations in existing grouting technologies is often based on directly placing holes at the location of a single protected object, without taking into account the complex surrounding environment. The hole placement is relatively simple, and generally only the final effect of grouting is considered, without considering the disturbance problem during the grouting process. Therefore, the results are often counterproductive.

[0004] Especially in situations with extremely high environmental protection requirements, particularly when deformation needs to be controlled within millimeter-level micro-ranges, important parameters such as grouting flow rate, grouting frequency, and pipe extraction speed will experience relatively significant self-disturbance. Therefore, the degree of precision is crucial to achieving construction control objectives. If the construction process is not properly controlled, the grouting method intended for reinforcement may actually cause greater disturbance to the strata, making it impossible to achieve the control targets. Large-scale micro-disturbance grouting machinery and equipment are usually required, which limits the flexibility and efficiency of construction. To address these issues, a vertical drilling and injection integrated machine and process method for micro-disturbance grouting inside subway tunnels are proposed. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides a vertical drilling and injection machine and process method for micro-disturbance grouting inside subway tunnels, aiming to solve the problem that "large-scale micro-disturbance grouting machinery and equipment are usually required in the prior art, which limits the flexibility and efficiency of construction".

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vertical drilling and injection integrated machine for micro-disturbance grouting inside subway tunnels, comprising:

[0007] A base is used to support the overall device. A sliding rail is installed on the inner wall of the base. A support frame is installed at one end of the sliding rail near the center line of the base. A drilling mechanism is provided on the outer wall of the sliding rail. A sealing component is provided on the upper surface of the base.

[0008] The drilling mechanism includes a sliding frame slidably connected to the outer wall of a sliding track. A support plate is fixedly connected to the front surface of the sliding frame, and a drill rod is rotatably connected to the lower surface of the support plate. A connector is threaded to the lower end of the drill rod, and a drill bit is threaded to the lower end of the connector. The drill rod is a hollow straight tube with an internal hollow structure. A drive assembly is provided on the inner wall of the sliding track.

[0009] As a further description of the above technical solution:

[0010] The drilling mechanism also includes a drilling motor, which is mounted on the upper surface of the support plate, and the output shaft of the drilling motor is fixedly connected to the upper end of the drill rod.

[0011] As a further description of the above technical solution:

[0012] The drill rod has a slurry inlet near the top and a slurry outlet near the bottom on its outer wall.

[0013] As a further description of the above technical solution:

[0014] A limiting frame is fixedly connected to the lower surface of the support plate, and a through groove is provided on the left surface of the limiting frame.

[0015] As a further description of the above technical solution:

[0016] The sealing assembly includes a tee pipe that is threaded to the upper surface of the base. A sealing groove is provided on the upper part of the inner wall of the tee pipe, and a Y-shaped sealing ring is installed on the inner wall of the sealing groove. A compression cap is threaded to the top of the tee pipe.

[0017] As a further description of the above technical solution:

[0018] A ball valve is installed at the side opening of the tee pipe. Multiple sets of ball valves are provided, one set of which is located at the bottom opening of the tee pipe.

[0019] As a further description of the above technical solution:

[0020] A pressure gauge is installed on the outside of the tee pipe, and the drill rod is inserted into the inner wall of the Y-shaped sealing ring.

[0021] As a further description of the above technical solution:

[0022] The drive assembly includes a rotating shaft that passes through and is rotatably connected to the inner wall of the sliding track. A gear is fixedly connected to the outer wall of the rotating shaft. Two sets of rotating shafts and gears are provided. One set of rotating shafts and gears is located on the inner wall of the sliding track near the bottom. A chain is meshed on the outer walls of both sets of gears. The chain passes through and is fixedly connected to the outer wall of the support plate.

[0023] As a further description of the above technical solution:

[0024] A drive motor is fixedly connected to the outer wall of the sliding track, and the output shaft of the drive motor is fixedly connected to the rotating shaft.

[0025] The process of micro-disturbance grouting inside subway tunnels includes the following steps:

[0026] S1: Preparation Steps

[0027] S101; Pre-embedded orifice pipe: Install orifice pipes on the outside of the track bed. Before pre-embedding the grouting orifice pipe, ensure that the drill core inside the hole is completely removed, the hole wall is dry and free of water accumulation, apply anchoring adhesive evenly around the orifice pipe, and rotate it in one direction when inserting it into the pre-embedded hole to ensure that the hole is evenly and densely bonded and that anchoring adhesive overflows from the orifice. Drill the hole and pre-embed the orifice pipe on the same day and install the cap.

[0028] S102: Pull-out test of the orifice tube: The pull-out test shall be carried out after an interval of more than 24 hours and after the anchoring adhesive has solidified and reached its strength. The pull-out test value shall not be less than 100KN. Data and photos of the pull-out test shall be kept for each hole.

[0029] S103: Installation Device: The base is fixed to the track bed with expansion bolts. The overall support frame is bolted to the base with fixing bolts. A sliding rail is installed on the inner wall of the base. The sliding frame of the drilling mechanism is then slidably connected to the outer wall of the sliding rail. The support plate is fixed to the front surface of the sliding frame. The drilling motor is installed on the upper surface of the support plate. The drill rod is rotatably connected to the lower surface of the support plate, and its upper end is fixed to the output shaft of the drilling motor. The lower end is connected to the drill bit through a connector. Finally, a tee pipe for the sealing assembly is threaded onto the upper surface of the base. Y-type sealing rings, extrusion caps, and other components are installed in sequence to ensure that the drill rod is inserted into the inner wall of the Y-type sealing ring.

[0030] S2: Drilling steps: Start the drive motor of the drive assembly to drive the shaft and gear to rotate, so that the chain drives the support plate and the entire drilling mechanism to move downward along the sliding track. At the same time, start the drilling motor to drive the drill rod and drill bit to rotate. Start drilling from the water drill opening position. After the drill rod passes through the seal, the drill bit stays in the sealed chamber. Open the ball valve. If there is leakage at the seal, press the seal and inject grease through the injection port to seal and stop the water. After there is no leakage, continue drilling to the specified depth behind the tube wall.

[0031] S3: Grouting steps:

[0032] S301: Grouting preparation: Before formal grouting, water is injected to flush open the grouting channel. The pressure at the orifice pipe is observed by a pressure gauge. If the pressure is appropriate, the grout is prepared.

[0033] S301: Grouting: Grout enters the hollow drill rod through the grout inlet and is discharged from the grout outlet. Grouting follows the principle of small amount and multiple times. The grouting depth of vertical holes is 0-10m behind the pipe segment wall. During the grouting process, the drill rod moves up and down under the action of the drive component. Up and down grouting is used to prevent the drill rod from getting stuck. The construction is carried out in a "one-stop" sequence. The two sets of grouting ports set for each ring of pipe segment are completed symmetrically on the same day or grouting is carried out simultaneously on the left and right sides of the ring at intervals. A small flow grouting pump is used to slowly, continuously and evenly grout. The moving speed of the drill rod 45 is adjusted according to the real-time monitoring data.

[0034] S4: Recycling Steps

[0035] S401: Pipeline cleaning: After the grouting reaches the design requirements, stop the grouting operation, and then start the drive assembly to retract the drill rod. After the drill rod passes through the ball valve, close the ball valve, and then clean the drill rod and drill bit that have left the tee pipe.

[0036] S402: Equipment Disassembly: After cleaning, the drill rod and drill bit can be smoothly removed from the sealing assembly. Then the sealing assembly can be removed, and the end cap can be installed above the orifice pipe. After that, the drilling and injection mechanism, sliding rail, overall support frame and base and other components are disassembled in sequence to complete the equipment recovery.

[0037] The present invention has the following beneficial effects:

[0038] 1. In this invention, by setting up a drilling and grouting mechanism and using a hollow drill rod for drilling, the drilling operation can be achieved by first rotating the drill rod. Then, the drill rod can be directly connected to the grouting equipment, so that grouting can be achieved directly using the drill rod. This is more convenient to operate and does not require reliance on large equipment. The overall device has good flexibility and high efficiency.

[0039] 2. In this invention, by setting a sealing component, during drilling, the drill bit can be guided through the Y-shaped sealing ring first, and then grease can be injected into the tee pipe. This can prevent gushing during the drilling process. In addition, with the help of a pressure gauge, the pressure at the drilling position can be measured in real time, which can further improve the accuracy of drilling and injection.

[0040] 3. In this invention, by adopting a modular design, during construction, the base can be fixed to the bottom of the construction site first, and then the sliding rail and support frame can be installed on the upper surface of the base. Subsequently, the sealing components and drilling mechanism can be installed in sequence. The whole device can be transported to the work site in batches before installation, making the whole device more convenient to use. Attached Figure Description

[0041] Figure 1 This is a three-dimensional structural diagram of the overall device in this invention;

[0042] Figure 2 This is a three-dimensional structural breakdown diagram of the overall device in this invention;

[0043] Figure 3 This is a three-dimensional structural breakdown diagram of the drill bit in this invention;

[0044] Figure 4 This is a three-dimensional structural diagram of the slurry inlet in this invention;

[0045] Figure 5 This is a three-dimensional structural disassembly diagram of the sealing component in this invention;

[0046] Figure 6 This is a three-dimensional cross-sectional view of the sealing component in this invention;

[0047] Figure 7 This is a three-dimensional structural breakdown diagram of the driving component in this invention.

[0048] Legend:

[0049] 1. Base; 2. Sliding rail; 3. Support frame; 4. Drilling mechanism; 41. Sliding frame; 42. Support plate; 43. Drilling motor; 44. Limiting frame; 45. Drill rod; 451. Grout discharge port; 452. Grout inlet port; 46. Connector; 47. Drill bit; 5. Drive assembly; 51. Chain; 52. Rotating shaft; 53. Drive motor; 54. Gear; 6. Sealing assembly; 61. T-shaped pipe; 62. Ball valve; 63. Y-type sealing ring; 64. Extrusion cap; 65. Pressure gauge; 66. Sealing groove. Detailed Implementation

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0051] Reference Figure 1 - Figure 3The present invention provides an embodiment of a vertical drilling and injection integrated machine for micro-disturbance grouting in subway tunnels, comprising: a base 1, which supports the overall device and consists of a set of flat bottom plates and two sets of vertical mounting plates. The flat bottom plates are mainly used to fix the overall device, while the vertical mounting plates are mainly used to support other devices. A sliding rail 2 is installed on the inner wall of the base 1, and the sliding rail 2 is partially connected to the vertical mounting plates of the base 1. Its top and bottom ends do not contact the flat bottom plates. A support frame 3 is installed at one end of the sliding rail 2 near the center line of the base 1. The support frame 3 is hollow inside and has holes on its surface. This arrangement can reduce the overall weight of the support frame 3 and facilitate transportation. A drilling and injection mechanism 4 is installed on the outer wall of the sliding rail 2. The drilling and injection mechanism 4 is mainly used to realize the two-step operation of drilling and grouting. The upper surface is provided with a sealing component 6; the drilling mechanism 4 includes a sliding frame 41 for driving the overall drilling mechanism 4 to move. The sliding frame 41 is slidably connected to the outer wall of the sliding track 2. The sliding frame 41 can move up and down on the outer wall of the sliding track 2. A support plate 42 is fixedly connected to the front surface of the sliding frame 41. The support plate 42 is set parallel to the base 1. A drill rod 45 for drilling is rotatably connected to the lower surface of the support plate 42. A connector 46 is threaded to the lower end of the drill rod 45. The connector 46 can close the lower opening of the drill rod 45. A drill bit 47 is threaded to the lower end of the connector 46. The drill rod 45 is a hollow straight tube with an internal hollow structure. If slurry is injected from one end of the drill rod 45, the slurry can flow out from the other end. A drive component 5 for controlling the movement of the drilling mechanism 4 is provided on the inner wall of the sliding track 2.

[0052] Reference Figure 1 , Figure 2 and Figure 4 The drilling mechanism 4 also includes a drilling motor 43 for driving the drill rod 45 to rotate. The drilling motor 43 is installed on the upper surface of the support plate 42. The output shaft of the drilling motor 43 is fixedly connected to the upper end of the drill rod 45. By starting the drilling motor 43, the drill rod 45 can be driven to rotate, thus realizing the drilling operation. The outer wall of the drill rod 45 is provided with a grout inlet 452 near the top and a grout outlet 451 near the bottom. After drilling is completed, the grout can be directly discharged into the designated location through the grout inlet 452 and the grout outlet 451. The lower surface of the support plate 42 is fixedly connected to a limit frame 44. The left surface of the limit frame 44 is provided with a through groove. When grouting, the grouting pipe can be passed through the through groove and connected to the grout inlet 452. In this way, the grouting pipe can be restricted by the limit frame 44 to prevent the drill rod 45 from rotating arbitrarily during grouting.

[0053] Reference Figure 2 , Figure 5 and Figure 6The sealing assembly 6 includes a tee pipe 61 with three openings on its outer wall, located on its upper, lower, and outer surfaces respectively. These openings are interconnected. The tee pipe 61 is threaded onto the upper surface of the base 1. During installation, the tee pipe 61 can be directly threaded onto the upper surface of the base 1. A sealing groove 66 for accommodating a sealing ring is located on the upper part of the inner wall of the tee pipe 61. A Y-shaped sealing ring 63 is installed on the inner wall of the sealing groove 66, with the Y-shaped sealing ring 63 having a Y-shaped cross-section. Its outer wall can fit against the inner wall of the sealing groove 66 to achieve a seal, and its inner wall can fit against the outer wall of the drill rod 45 to achieve a seal. The top end of the tee pipe 61 is threaded with a compression cap 64. A ball valve 62 for controlling the opening and closing of the tee pipe 61 is installed at the side opening position. There are multiple sets of ball valves 62, one set of ball valves 62 is located at the bottom opening position of the tee pipe 61. A pressure gauge 65 for detecting the pressure of the inner wall of the tee pipe 61 is installed on the outside of the tee pipe 61. The drill rod 45 is inserted into the inner wall of the Y-shaped sealing ring 63.

[0054] Reference Figure 1 , Figure 2 and Figure 7 The drive assembly 5 includes a rotating shaft 52 for supporting the gear 54. The rotating shaft 52 passes through and is rotatably connected to the inner wall of the sliding track 2. The rotating shaft 52 can rotate within the inner wall of the sliding track 2 but cannot be separated from the sliding track 2. The gear 54 is fixedly connected to the outer wall of the rotating shaft 52. Two sets of rotating shafts 52 and gears 54 are provided. One set of rotating shafts 52 and gears 54 is located near the bottom end of the inner wall of the sliding track 2. The two sets of rotating shafts 52 and gears 54 overlap each other in the vertical direction. A chain 51 is meshed with the outer walls of the two sets of gears 54. When one set of rotating shafts 52 rotates, it can drive the chain 51 to rotate through the gear 54 fixed to the outer wall. This drives another set of gears 54 and the rotating shaft 52 to rotate. The chain 51 passes through and is fixedly connected to the outer wall of the support plate 42. When the chain 51 rotates, it can drive the support plate 42 to move up or down. The outer wall of the sliding track 2 is fixedly connected to a drive motor 53 for controlling the rotation of the chain 51. The output shaft of the drive motor 53 is fixedly connected to the rotating shaft 52. By starting the drive motor 53, the rotating shaft 52 connected to it can be driven to rotate. Both the drive motor 53 and the drilling motor 43 are servo motors, and their speed and direction can be controlled. Thus, precise drilling can be achieved through the cooperation of the drive motor 53 and the drilling motor 43.

[0055] The process of micro-disturbance grouting inside subway tunnels includes the following steps:

[0056] S101; Pre-embedded orifice pipe: Install orifice pipes on the outside of the track bed. Before pre-embedding the grouting orifice pipe, ensure that the drill core inside the hole is completely removed, the hole wall is dry and free of water accumulation, apply anchoring adhesive evenly around the orifice pipe, and rotate it in one direction when inserting it into the pre-embedded hole to ensure that the hole is evenly and densely bonded and that anchoring adhesive overflows from the orifice. Drill the hole and pre-embed the orifice pipe on the same day and install the cap.

[0057] S102: Pull-out test of the orifice tube: The pull-out test shall be carried out after an interval of more than 24 hours and after the anchoring adhesive has solidified and reached its strength. The pull-out test value shall not be less than 100KN. Data and photos of the pull-out test shall be kept for each hole.

[0058] S103: Installation Device: The base 1 is fixed to the track bed with expansion bolts. The overall support frame 3 is bolted to the base 1 with fixing bolts. A sliding rail 2 is installed on the inner wall of the base 1. The sliding frame 41 of the drilling mechanism 4 is then slidably connected to the outer wall of the sliding rail 2. The support plate 42 is fixed to the front surface of the sliding frame 41. The drilling motor 43 is installed on the upper surface of the support plate 42. The drill rod 45 is rotatably connected to the lower surface of the support plate 42, and its upper end is fixed to the output shaft of the drilling motor 43. The lower end is connected to the drill bit 47 through the connector 46. Finally, the three-way pipe 61 of the sealing component 6 is threaded to the upper surface of the base 1. The Y-type sealing ring 63, the extrusion cap 64, and other components are installed in sequence to ensure that the drill rod 45 is inserted into the inner wall of the Y-type sealing ring 63.

[0059] S2: Drilling steps: Start the drive motor 53 of the drive assembly 5 to drive the rotating shaft 52 and gear 54 to rotate, so that the chain 51 drives the support plate 42 and the drilling mechanism 4 to move downward along the sliding track 2. At the same time, start the drilling motor 43 to drive the drill rod 45 and drill bit 47 to rotate. Start drilling from the water drill opening position. After the drill rod 45 passes through the seal, the drill bit 47 stays in the sealed chamber. Open the ball valve 62. If there is leakage at the seal, press the seal and inject grease into the injection port to seal and stop the water. After there is no leakage, continue drilling to the specified depth behind the tube wall.

[0060] S3: Grouting steps:

[0061] S301: Grouting preparation: Before formal grouting, water is injected to flush open the grouting channel. The pressure at the orifice pipe is observed through pressure gauge 65. If the pressure is appropriate, the grout is prepared.

[0062] S301: Grouting: Grout enters the hollow drill rod 45 through the grout inlet 452 and is discharged from the grout outlet 451. Grouting follows the principle of small amount and multiple times. The grouting depth of the vertical hole is 0-10m behind the pipe segment wall. During the grouting process, the drill rod 45 moves up and down under the action of the drive component 5. The up and down grouting is used to prevent the drill rod 45 from getting stuck. The construction is carried out in the order of "do one, skip one". The two sets of grouting ports set for each ring of pipe segment are completed symmetrically on the same day or grouting is carried out simultaneously on the left and right sides of the ring at intervals. A small flow grouting pump is used to slowly, continuously and evenly grout. The moving speed of the drill rod 45 is adjusted according to the real-time monitoring data.

[0063] S4: Recycling Steps

[0064] S401: Pipeline cleaning: After the grouting reaches the design requirements, stop the grouting operation, and then start the drive assembly 5 to retract the drill rod 45. After the drill rod 45 passes through the ball valve 62, close the ball valve 62, and then clean the drill rod 45 and drill bit 47 that have left the tee pipe 61.

[0065] S402: Equipment disassembly: After cleaning, the drill rod 45 and drill bit 47 can be smoothly removed from the sealing assembly 6. Then the sealing assembly 6 can be removed, and the end cap can be installed above the orifice pipe. After that, the drilling and injection mechanism 4, sliding rail 2, overall support frame 3 and base 1 are disassembled in sequence to complete the equipment recovery.

[0066] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical drilling and injection integrated machine for micro-disturbance grouting inside subway tunnels, characterized in that: include: The base (1) is used to support the overall device. A sliding rail (2) is installed on the inner wall of the base (1). A support frame (3) is installed at one end of the sliding rail (2) near the center line of the base (1). A drilling mechanism (4) is provided on the outer wall of the sliding rail (2). A sealing component (6) is provided on the upper surface of the base (1). The drilling mechanism (4) includes a sliding frame (41), which is slidably connected to the outer wall of the sliding track (2). A support plate (42) is fixedly connected to the front surface of the sliding frame (41), and a drill rod (45) is rotatably connected to the lower surface of the support plate (42). A connector (46) is threaded to the lower end of the drill rod (45), and a drill bit (47) is threaded to the lower end of the connector (46). The drill rod (45) is a hollow straight tube with an internal hollow structure. A drive assembly (5) is provided on the inner wall of the sliding track (2).

2. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 1, characterized in that: The drilling mechanism (4) also includes a drilling motor (43), which is mounted on the upper surface of the support plate (42), and the output shaft of the drilling motor (43) is fixedly connected to the upper end of the drill rod (45).

3. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 1, characterized in that: The drill rod (45) has a grout inlet (452) near the top end on its outer wall and a grout outlet (451) near the bottom end on its outer wall.

4. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 1, characterized in that: A limiting frame (44) is fixedly connected to the lower surface of the support plate (42), and a through groove is provided on the left surface of the limiting frame (44).

5. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 1, characterized in that: The sealing assembly (6) includes a three-way pipe (61), which is threaded to the upper surface of the base (1). A sealing groove (66) is provided on the upper part of the inner wall of the three-way pipe (61), and a Y-shaped sealing ring (63) is installed on the inner wall of the sealing groove (66). A compression cap (64) is threaded to the top of the three-way pipe (61).

6. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 5, characterized in that: A ball valve (62) is installed at the side opening of the three-way pipe (61). There are multiple sets of ball valves (62), one of which is located at the bottom opening of the three-way pipe (61).

7. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 5, characterized in that: A pressure gauge (65) is installed on the outside of the tee pipe (61), and the drill rod (45) is inserted into the inner wall of the Y-shaped sealing ring (63).

8. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 1, characterized in that: The drive assembly (5) includes a rotating shaft (52), which is rotatably connected to the inner wall of the sliding track (2). A gear (54) is fixedly connected to the outer wall of the rotating shaft (52). Two sets of rotating shafts (52) and gears (54) are provided. One set of rotating shafts (52) and gears (54) is located on the inner wall of the sliding track (2) near the bottom. The outer walls of the two sets of gears (54) are meshed with a chain (51). The chain (51) is rotatably connected to the outer wall of the support plate (42).

9. The integrated vertical drilling and injection machine for micro-disturbance grouting inside subway tunnels according to claim 8, characterized in that: A drive motor (53) is fixedly connected to the outer wall of the sliding track (2), and the output shaft of the drive motor (53) is fixedly connected to the rotating shaft (52).

10. A process for micro-disturbance grouting inside a subway tunnel, comprising the vertical drilling and injection integrated machine for micro-disturbance grouting inside a subway tunnel as described in claims 1-9, characterized in that: Includes the following steps: S1: Preparation Steps S101; Pre-embedded orifice pipe: Install orifice pipes on the outside of the track bed. Before pre-embedding the grouting orifice pipe, ensure that the drill core inside the hole is completely removed, the hole wall is dry and free of water accumulation, apply anchoring adhesive evenly around the orifice pipe, and rotate it in one direction when inserting it into the pre-embedded hole to ensure that the hole is evenly and densely bonded and that anchoring adhesive overflows from the orifice. Drill the hole and pre-embed the orifice pipe on the same day and install the cap. S102: Pull-out test of the orifice tube: The pull-out test shall be carried out after an interval of more than 24 hours and after the anchoring adhesive has solidified and reached its strength. The pull-out test value shall not be less than 100KN. Data and photos of the pull-out test shall be kept for each hole. S103: Installation device: The base (1) is fixed to the track bed with expansion bolts. The overall support frame (3) is bolted to the base (1) with fixing bolts. The sliding rail (2) is installed on the inner wall of the base (1). The sliding frame (41) of the drilling mechanism (4) is then slidably connected to the outer wall of the sliding rail (2). The support plate (42) is fixed to the front surface of the sliding frame (41). The drilling motor (43) is installed on the upper surface of the support plate (42). The drill rod (45) is rotatably connected to the lower surface of the support plate (42) and its upper end is fixed to the output shaft of the drilling motor (43). The lower end is connected to the drill bit (47) through the connector (46). Finally, the three-way pipe (61) of the sealing component (6) is threaded to the upper surface of the base (1). The Y-type sealing ring (63), the extrusion cap (64) and other components are installed in sequence to ensure that the drill rod (45) is inserted into the inner wall of the Y-type sealing ring (63). S2: Drilling steps: Start the drive motor (53) of the drive assembly (5) to drive the shaft (52) and gear (54) to rotate, so that the chain (51) drives the support plate (42) and the drilling mechanism (4) to move downward along the sliding track (2). At the same time, start the drilling motor (43) to drive the drill rod (45) and drill bit (47) to rotate. Start drilling from the water drill opening position. After the drill rod (45) passes through the seal, the drill bit (47) stays in the sealed chamber. Open the ball valve (62). If there is leakage at the seal, seal and inject grease through the sealing and injection port to stop the water leakage. After there is no leakage, continue drilling to the specified depth behind the tube wall. S3: Grouting steps: S301: Grouting preparation: Before formal grouting, water is injected to flush open the grouting channel. The pressure at the orifice pipe is observed by pressure gauge (65). If the pressure is appropriate, the grout is prepared. S301: Grout injection: Grout enters the hollow drill rod (45) through the grout inlet (452) and is discharged from the grout outlet (451). Grouting follows the principle of small amount and multiple times. The grouting depth of the vertical hole is 0-10m behind the pipe segment wall. During the grouting process, the drill rod (45) moves up and down under the action of the drive component (5). Grouting is carried out up and down to prevent the drill rod (45) from getting stuck. The construction is carried out in the order of "doing one and skipping one". The two sets of grouting ports set for each ring of pipe segment are symmetrically grouted on the same day or grouted on both sides of the left and right sides at intervals of one ring. A small flow grouting pump is used to slowly, continuously and evenly grout. The moving speed of the drill rod 45 is adjusted according to the real-time monitoring data. S4: Recycling Steps S401: Pipeline cleaning: After the grouting reaches the design requirements, stop the grouting operation, and then start the drive assembly (5) to retract the drill rod (45). After the drill rod (45) passes through the ball valve (62), close the ball valve (62), and then clean the drill rod (45) and drill bit (47) that have left the tee pipe (61). S402: Equipment disassembly: After cleaning, the drill rod (45) and drill bit (47) can be smoothly removed from the sealing assembly (6), and then the sealing assembly (6) can be removed. Install the cap on the top of the orifice pipe, and then disassemble the drilling and injection mechanism (4), sliding rail (2), overall support frame (3) and base (1) in sequence to complete the equipment recycling.

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