Advanced grouting device for shield roadway

Abstract

The invention relates to the technical field of advanced grouting, and discloses a shield roadway advanced grouting device which comprises a supporting frame and a supporting plate and further comprises a drilling machine base and a drilling assembly, the drilling machine base is connected with the supporting frame through an adjusting assembly, and the drilling assembly is arranged on the surface of the drilling machine base and comprises a movable drilling machine. The movable drilling machine is connected with an anchor rod body through a clamping piece A at the output end of the movable drilling machine, the movable drilling machine is connected with a drilling machine base through a pushing cylinder, the pull-back assembly is arranged at the top of the supporting frame and used for pulling back a broken anchor rod or an anchor rod difficult to tunnel, and the pull-back assembly comprises a top frame arranged at the top of the supporting frame; a plurality of synchronous wheels and a synchronous belt matched with the synchronous wheels are arranged in the top frame, a clamping piece B used for clamping an anchor rod is arranged at the bottom of the top frame, and the clamping piece B is connected with the synchronous belt through a connecting block. The device has the effect of synchronously drilling the secondary anchor rod and pulling out the old anchor rod, and the advanced grouting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of advanced grouting, and more specifically, it relates to an advanced grouting device for shield roadways. Background Art

[0002] A shield machine is an integrated equipment widely used in tunnel boring projects. In recent years, shield machines have gradually been introduced into coal mines. The rock roadway bored by a shield machine is called a shield roadway. Due to the advantages of high efficiency, high speed, and high degree of equipment integration of shield machines, they have gradually become the mainstream equipment for future coal mine rock roadway boring.

[0003] Since soft and broken strata are widely distributed in coal mines, the surrounding rock of roadways is prone to deformation under the disturbance of tunneling. When a shield machine tunnels in such strata, it is more inconvenient, the average monthly footage is relatively low, which affects the construction efficiency, and the surrounding rock is relatively soft, which even threatens the construction safety. Therefore, it is necessary to carry out advanced grouting reinforcement of the surrounding rock before the shield machine tunnels.

[0004] The existing advanced grouting is carried out by driving grouting bolts through a drill rig to stabilize the surrounding rock within a certain range in front of the shield machine. However, due to factors such as the grouting stratum and rock hardness, problems such as bolt fracture and hole blockage frequently occur during the grouting process, and it is necessary to frequently pull out the bolts and switch to other anchor holes to continue drilling, resulting in an extended construction progress and being unfavorable for high-efficiency construction. Summary of the Invention

[0005] The present invention discloses an advanced grouting device for shield roadways to solve the technical problems in the above background art.

[0006] The present invention discloses an advanced grouting device for shield roadways, including a support frame and a support plate, and further including a drill rig base, wherein the drill rig base is connected to the support frame through an adjustment assembly;

[0007] A drilling assembly is arranged on the surface of the drill rig base. The drilling assembly includes a mobile drill rig, and the mobile drill rig is connected to a bolt body through a clamping member A at its output end. The mobile drill rig is connected to the drill rig base through a propulsion cylinder;

[0008] A pulling-back assembly is arranged on the top of the support frame and is used for pulling back broken or difficult-to-drill bolts. The pulling-back assembly includes a top frame arranged on the top of the support frame. A plurality of synchronous pulleys and synchronous belts cooperating with the synchronous pulleys are arranged inside the top frame. A clamping member B for clamping the bolt is arranged at the bottom of the top frame, and the clamping member B is connected to the synchronous belt through a connecting block;

[0009] It further includes a synchronous assembly for enabling the propulsion action of the mobile drill rig and the pulling-back action of the bolt to be carried out simultaneously.

[0010] Preferably, the synchronization component includes a synchronization plate fixedly connected to the top of the mobile drill. An adjustment groove is formed on the surface of the synchronization plate, and a movable block is arranged through the adjustment groove. One side of the top frame is rotatably connected to a limit shaft, the limit shaft penetrates through the movable block, a limit block adapted to the adjustment groove is fixedly connected to the bottom of the movable block, and a clamping block adapted to the synchronous belt is fixedly connected to the top of the movable block.

[0011] Preferably, a slope section is arranged on the bottom plane of the adjustment groove. The slope section divides the bottom plane of the adjustment groove into a groove plane A and a groove plane B. The groove plane A and the groove plane B have a non-zero height difference on the horizontal plane, and the height of the groove plane A is higher than that of the groove plane B. When the clamping block abuts against the surface of the synchronous belt, the limit block abuts against the surface of the groove plane A.

[0012] Preferably, the limit shaft is connected to the top frame through a torsion spring. When the torsion spring is in a relaxed state, the clamping block does not contact the synchronous belt.

[0013] Preferably, the contact position between the clamping block and the synchronous belt and the connection position between the connecting block and the synchronous belt are respectively located on both sides of the synchronous pulley.

[0014] Preferably, it further includes a plugging component. The plugging component includes an auxiliary frame fixedly connected to the bottom of the top frame. A positioning block is fixedly connected to the surface of the auxiliary frame. A positioning hole adapted to the anchor hole is formed on the surface of the positioning block. A plugging member for plugging the anchor hole is arranged in the auxiliary frame. A slant block is fixedly connected to the surface of the auxiliary frame. An inclined groove adapted to the slant block is formed in the auxiliary frame. When the plugging member fits against the surface of the inclined groove, one end thereof points to the positioning hole on the surface of the positioning block;

[0015] It further includes a triggering member for making the plugging member point to the anchor hole.

[0016] Preferably, the triggering member includes a guiding groove formed at the bottom of the auxiliary frame. The guiding groove is in the shape of "7". A convex block is slidably connected in the guiding groove. The convex block is fixedly connected to the plugging member. The convex block is connected to the auxiliary frame through a tension spring.

[0017] Preferably, a pulling cylinder is fixedly connected to the bottom of the auxiliary frame. The output end of the pulling cylinder is fixedly connected to a pulling block adapted to the convex block. A photoelectric sensor is arranged in the positioning hole. The photoelectric sensor is electrically connected to the pulling cylinder.

[0018] Preferably, the support frame is installed on the surface of the support plate at a certain inclination angle, and the inclination angle range is 5°-10°.

[0019] Preferably, the adjustment component includes a moving motor. The output end of the moving motor is fixedly connected to a screw rod. The screw rod penetrates through the support frame. A slider is threadedly connected to the surface of the screw rod. The slider is fixedly connected to the drill base, and the slider is limited to slide in the support frame.

[0020] The beneficial effects of the present invention are as follows:

[0021] By cooperating the pulling-back assembly for pulling back the anchor rod with the synchronization assembly, when the advanced grouting anchor rod encounters resistance or breaks and needs to be pulled out and the anchor hole is to be replaced, it is not necessary to first pull out the anchor rod by a drilling rig, then replace the anchor rod and switch to another anchor hole for secondary injection. Instead, only the drilling rig needs to directly switch to another anchor hole for anchor rod drilling. Along with the action of the secondary anchor rod drilling, the broken or ineffective anchor rod is simultaneously pulled outwards. The two operations are synchronized, effectively reducing the construction progress duration, making up for the deficiencies of the prior art, and improving the efficiency of advanced grouting of the anchor rod to a certain extent.

[0022] By providing a plugging assembly, after the anchor rod is pulled out, a plugging member is inserted into the anchor hole in time to plug the anchor hole in time, avoiding the leakage of the grouting liquid and the outflow of water and associated impurities in the surrounding rock, which may affect the normal grouting operation, and improving the coherence in the entire advanced grouting operation of the anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the schematic diagram for showing the other side of the present device;

[0025] Figure 3 is the partial structural schematic diagram for showing the pulling-back assembly of the present invention;

[0026] Figure 4 is the schematic diagram of the state for showing the mobile drilling rig switching the anchor hole;

[0027] Figure 5 is the present invention Figure 4 The enlarged view at A in;

[0028] Figure 6 is the schematic diagram for showing the structure inside and near the synchronization plate of the present invention;

[0029] Figure 7 is the schematic diagram for showing the plugging assembly of the present invention;

[0030] Figure 8 is the schematic diagram for showing the bottom structure of the auxiliary frame.

[0031] In the figure: 1. Support frame; 11. Support plate; 12. Moving motor; 13. Screw rod; 14. Slide block; 2. Drilling rig base; 21. Moving drilling rig; 211. Propelling cylinder; 22. Clamping part A; 23. Bolt body; 3. Top frame; 31. Synchronous pulley; 311. Synchronous belt; 32. Clamping part B; 321. Connecting block; 33. Movable block; 331. Limiting block; 332. Block; 333. Limiting shaft; 34. Synchronous plate; 341. Adjusting groove; 342. Groove plane A; 343. Groove plane B; 4. Auxiliary frame; 41. Positioning block; 42. Inclined block; 421. Guide groove; 422. Pull-back cylinder; 423. Pulling block; 43. Sealing part; 431. Convex block; 432. Pulling spring. Detailed implementation mode

[0032] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described in some examples can also be combined in other examples.

[0033] In an embodiment of the present invention, a shield roadway advanced grouting device is disclosed. As Figure 1 and Figure 2 shown, it includes a support frame 1 and a support plate 11. The support frame 1 is in a "mouth" shape, and the support frame 1 is connected to the support plate 11 by means of bolts or welding. It also includes a drilling rig base 2. The drilling rig base 2 is connected to the support frame 1 through an adjusting component. A drilling component is arranged on the surface of the drilling rig base 2. The drilling component includes a moving drilling rig 21. The moving drilling rig 21 slides in the drilling rig base 2. The moving drilling rig 21 is connected to a bolt body 23 through a clamping part A 22 at its output end. The moving drilling rig 21 is connected to the drilling rig base 2 through a propelling cylinder 211.

[0034] The clamping part A 22 is essentially a hydraulic cylinder telescopic part with an internal movable fixture. Hydraulic cylinders are arranged on both sides of it. The output end of the hydraulic cylinder is provided with clamping blocks. A clamping plate is rotatably connected between the two clamping blocks in a limited way. The clamping plate can be combined into one when they are mutually pressed and clamped, and can rotate between the two relative clamping blocks. When the two clamping plates respectively clamp the output shaft of the moving drilling rig 21 and the bolt body 23, the bolt body 23 can be driven to rotate synchronously by the rotation of the moving drilling rig 21 in cooperation with the clamping plate, thereby drilling the bolt. Correspondingly, after the hydraulic cylinder contracts, the clamping plate no longer clamps the bolt, so that the bolt can be separated from the moving drilling rig 21. Further, when the moving drilling rig 21 drives the bolt to rotate, the propelling cylinder 211 outputs synchronously, so that the bolt continuously advances and drills along the anchor hole to achieve the subsequent grouting purpose.

[0035] As shown Figure 3 in the figure, the present embodiment includes a pulling-back assembly disposed on the top of the support frame 1 for pulling back the broken or difficult-to-drill anchor bolts. The pulling-back assembly includes a top frame 3 disposed on the top of the support frame 1. The top frame 3 is fixed to the top of the support frame 1 and is suspended above the mobile drill 21 and the drill base 2. A plurality of synchronous pulleys 31 and a synchronous belt 311 cooperating with the synchronous pulleys 31 are arranged in the top frame 3. The synchronous pulleys 31 and the synchronous belt 311 operate synchronously. When the synchronous pulleys 31 rotate, the synchronous belt 311 is driven. A clamping member B32 for clamping the anchor bolt is disposed at the bottom of the top frame 3. The clamping member B32 has the same function as the clamping member A22, which will not be elaborated here. The clamping member B32 is connected to the synchronous belt 311 through a connecting block 321. Both ends of the connecting block 321 are fixedly connected to the clamping member B32 and the synchronous belt 311 respectively. It further includes a synchronous component for enabling the advancing action of the mobile drill 21 and the pulling-back action of the anchor bolt to be carried out simultaneously.

[0036] Specifically, before the anchor bolt body 23 needs to be pulled out of the anchor hole, the anchor bolt body 23 needs to be clamped and fixed by the clamping member B32. The synchronous component can drive the synchronous belt 311 to drive, thereby enabling the synchronous pulleys 31 to rotate. The driving of the synchronous belt 311 causes the connecting block 321 fixed on its surface to move, and further enables the clamping member B32 at the bottom to drive the anchor bolt body 23 to move backward, thereby pulling out the anchor bolt body 23 from the anchor hole.

[0037] Furthermore, as shown Figure 4 in Figure 5 and Figure 6 the figure, the synchronous component includes a synchronous plate 34 fixedly connected to the top of the mobile drill 21. An adjustment groove 341 is formed on the surface of the synchronous plate 34, and a movable block 33 is arranged through the adjustment groove 341. The movable block 33 can be limited and slide in the adjustment groove 341. A limiting shaft 333 is rotatably connected to one side of the top frame 3. The limiting shaft 333 penetrates through the movable block 33. A limiting block 331 adapted to the adjustment groove 341 is fixedly connected to the bottom of the movable block 33. A clamping block 332 adapted to the synchronous belt 311 is fixedly connected to the top of the movable block 33.

[0038] Among them, a slope section is provided on the bottom plane of the adjustment groove 341. The slope section divides the bottom plane of the adjustment groove 341 into a groove plane A342 and a groove plane B343. The groove plane A342 and the groove plane B343 have a non-zero height difference on the horizontal plane, and the height of the groove plane A342 is higher than that of the groove plane B343. When the clamping block 332 abuts against the surface of the synchronous belt 311, the limiting block 331 abuts against the surface of the groove plane A342.

[0039] Specifically, through the setting of the mutually cooperating synchronization plate 34 and the movable block 33, in the normal state, that is, when the mobile drill 21 is located below the top frame 3, the limit block 331 is at the position of the groove plane B343 at this time. Since the height of the groove plane A342 is higher than that of the groove plane B343, the groove plane B343 at this time will not provide an upward force to the limit block 331. When the mobile drill 21 needs to switch the anchor hole for re-grouting, the mobile drill 21 moves horizontally driven by the adjusting assembly, and then drives the synchronization plate 34 to move horizontally synchronously. Further, since the movable block 33 is limited by the limit shaft 333, the limit block 331 at its bottom will slide in the adjusting groove 341. Since there is a ramp buffer section in the adjusting groove 341, when the limit block 331 passes through the ramp buffer section from the groove plane B343 to the groove plane A342, the height of the groove plane A342 is higher than that of the groove plane B343, so an upward force will be given to the limit block 331. Specifically in terms of movement, it will cause the movable block 33 to rotate around the limit shaft 333 as the center point. Correspondingly, the clamping block 332 at the top of the movable block 33 will move and closely adhere to the surface of the synchronous belt 311, and then can run synchronously with the synchronous belt 311. At this time, when the mobile drill 21 performs the drilling operation of the second anchor rod through the output of the propulsion cylinder 211, the synchronization plate 34 will move forward synchronously, drive the movable block 33 to move forward, and drive the synchronous belt 311. The connecting block 321 on the other side of the synchronous belt 311 will drive the clamping piece B32 to move backward with the synchronous belt 311, and then pull out the blocked or broken anchor rod body 23 from the anchor hole. The drilling of the new anchor rod and the pulling out of the old anchor rod are carried out synchronously, effectively improving the efficiency of advanced grouting.

[0040] Further, the limit shaft 333 is connected to the top frame 3 through a torsion spring. When the torsion spring is in a relaxed state, the clamping block 332 does not contact the synchronous belt 311. By setting the torsion spring, it is convenient to avoid the contact between the clamping block 332 and the synchronous belt 311 in the normal state, and only when the limit block 331 contacts the groove plane A342 and drives the movable block 33 to rotate, the clamping block 332 contacts and cooperates with the synchronous belt 311, improving the controllability.

[0041] Among them, the contact position between the clamping block 332 and the synchronous belt 311 and the connection position between the connecting block 321 and the synchronous belt 311 are respectively located on both sides of the synchronous pulley 31. The moving directions of the moving sections of the synchronous belt 311 on both sides of the synchronous pulley 31 are opposite, which is convenient to realize the synchronous action of the drilling of the new anchor rod and the pulling out of the old anchor rod.

[0042] Such as Figure 7 and Figure 8As shown, in this embodiment, it further includes a plugging assembly. The plugging assembly includes an auxiliary frame 4 fixedly connected to the bottom of the top frame 3. A positioning block 41 is fixedly connected to the surface of the auxiliary frame 4. A positioning hole adapted to the anchor hole is provided on the surface of the positioning block 41. At the same time, the anchor rod body 23 also passes through this positioning hole and then drills into the anchor hole. The positioning hole also has a positioning effect on the anchor rod body 23. A plugging member 43 for plugging the anchor hole is arranged in the auxiliary frame 4. The plugging member 43 is an epoxy resin rod, a rubber water stop rod, etc. After inserting it into the anchor hole, it is convenient for effective preliminary plugging, so as to carry out the next step of grouting and plugging the hole. An inclined block 42 is fixedly connected to the surface of the auxiliary frame 4. An inclined groove adapted to the inclined block 42 is provided in the auxiliary frame 4. When the plugging member 43 fits the surface of the inclined groove, one end thereof points to the positioning hole on the surface of the positioning block 41. In the normal state, the plugging member 43 fits the inner wall of the auxiliary frame 4 and does not point to the positioning hole. It also includes a triggering member for making the plugging member 43 point to the anchor hole.

[0043] Furthermore, the triggering member includes a guiding groove 421 opened at the bottom of the auxiliary frame 4. The guiding groove 421 is in the shape of a "7". A convex block 431 is slidably connected in the guiding groove 421. The convex block 431 is fixedly connected to the plugging member 43. The convex block 431 is connected to the auxiliary frame 4 through a tension spring 432. A retracting cylinder 422 is fixedly connected to the bottom of the auxiliary frame 4. The output end of the retracting cylinder 422 is fixedly connected to a pulling block 423 adapted to the convex block 431. A photoelectric sensor is arranged in the positioning hole. The photoelectric sensor is electrically connected to the retracting cylinder 422.

[0044] Specifically, the positioning block 41 can be attached to or close to the surface of the anchor hole. Through the setting of the photoelectric sensor, in the normal state, the anchor rod body 23 passes through the positioning hole. At this time, it is a normal photoelectric signal. When the anchor rod body 23 is gradually pulled out until it is pulled out from the anchor hole and the positioning hole, the photoelectric sensor senses that the anchor rod is completely pulled out and transmits the signal to the retracting cylinder 422. A controller is arranged in the retracting cylinder 422. The controller controls the retracting cylinder 422 to contract, thereby pulling the pulling block 423 to pull the convex block 431 outward, so that the plugging member 43 moves in the direction of the inclined block 42 until it fits the surface of the inclined groove. One end of the plugging member 43 also gradually moves in the direction of the positioning hole until the convex block 431 moves to the bending part of the guiding groove 421. At this time, under the pulling-back action of the tension spring 432, the convex block 431 and the plugging member 43 are driven to move forward along the guiding groove 421. The plugging member 43 faces the direction of the positioning hole, so it will directly insert into the anchor hole through the positioning hole for preliminary plugging. In addition, the plugging member 43 and the convex block 431 can be set in a detachable connection manner. After the plugging member 43 is inserted into the anchor hole, by disassembling the plugging member 43 from the convex block 431, the position of the plugging member 43 is further adjusted and completely inserted into the anchor hole for plugging, which is convenient for the next plugging operation.

[0045] The support frame 1 is installed on the surface of the support plate 11 at a certain inclination angle, and the inclination angle range is 5° - 10°. Correspondingly, the support plate 11 is set horizontally, and the support frame 1 is set on its surface at a certain inclination angle, which is convenient for advanced grouting from the rear platform of the shield machine towards the front upper part of its cutter head.

[0046] The adjustment assembly includes a moving motor 12. The output end of the moving motor 12 is fixedly connected with a screw rod 13. The screw rod 13 penetrates through the support frame 1. A slider 14 is threadedly connected to the surface of the screw rod 13. The slider 14 is fixedly connected with the drill base 2, and the slider 14 is limited to slide within the support frame 1. Through the output of the moving motor 12, the screw rod 13 is driven to rotate, and then the slider 14 on the surface of the screw rod 13 is driven to slide within the support frame 1, thereby moving the entire drill base 2 and the moving drill 21 to switch the anchor hole position.

[0047] The embodiments of the present invention have been described above, but these embodiments are not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make more equivalent embodiments in various forms, all of which fall within the protection scope of this embodiment.

Claims

1. A shield tunnel advanced grouting device, comprising a support frame (1) and a support plate (11), characterized in that, It further includes a drilling rig base (2), and the drilling rig base (2) is connected to the support frame (1) through an adjusting assembly; A drilling assembly is arranged on the surface of the drilling rig base (2). The drilling assembly includes a mobile drilling rig (21). The mobile drilling rig (21) is connected with a bolt body (23) through a clamping member A (22) at its output end, and the mobile drilling rig (21) is connected to the drilling rig base (2) through a propulsion cylinder (211); A pulling-back assembly is arranged at the top of the support frame (1) and is used for pulling back bolts that are broken or difficult to drive. The pulling-back assembly includes a top frame (3) arranged at the top of the support frame (1). A plurality of synchronous pulleys (31) and a synchronous belt (311) cooperating with the synchronous pulleys (31) are arranged in the top frame (3). A clamping member B (32) for clamping the bolt is arranged at the bottom of the top frame (3), and the clamping member B (32) is connected to the synchronous belt (311) through a connecting block (321); It further includes a synchronous assembly for enabling the propulsion action of the mobile drilling rig (21) and the pulling-back action of the bolt to be carried out simultaneously.

2. The shield tunnel advanced grouting device according to claim 1, characterized in that, The synchronous assembly includes a synchronous plate (34) fixedly connected to the top of the mobile drilling rig (21). An adjusting groove (341) is formed on the surface of the synchronous plate (34), and a movable block (33) is arranged through the adjusting groove (341). A limiting shaft (333) is rotatably connected to one side of the top frame (3), and the limiting shaft (333) penetrates through the movable block (33). A limiting block (331) adapted to the adjusting groove (341) is fixedly connected to the bottom of the movable block (33), and a clamping block (332) adapted to the synchronous belt (311) is fixedly connected to the top of the movable block (33).

3. The advanced grouting device for shield roadway according to claim 2, characterized in that, A slope section is arranged on the bottom plane of the adjusting groove (341). The slope section divides the bottom plane of the adjusting groove (341) into a groove plane A (342) and a groove plane B (343). The groove plane A (342) and the groove plane B (343) have a non-zero height difference on the horizontal plane, and the height of the groove plane A (342) is higher than that of the groove plane B (343). When the clamping block (332) abuts against the surface of the synchronous belt (311), the limiting block (331) abuts against the surface of the groove plane A (342).

4. The shield tunnel advanced grouting device according to claim 2, characterized in that, The limiting shaft (333) is connected to the top frame (3) through a torsion spring. When the torsion spring is in a relaxed state, the clamping block (332) does not contact the synchronous belt (311).

5. A shield tunnel advanced grouting device according to claim 1 or 2, characterized in that, The contact position between the clamping block (332) and the synchronous belt (311) and the connection position between the connecting block (321) and the synchronous belt (311) are respectively located on both sides of the synchronous pulley (31).

6. The shield tunnel advanced grouting device according to claim 1, characterized in that, It further includes a plugging component. The plugging component includes an auxiliary rack (4) fixedly connected to the bottom of the top rack (3). A positioning block (41) is fixedly connected to the surface of the auxiliary rack (4). A positioning hole adapted to the anchor hole is formed in the surface of the positioning block (41). A plugging member (43) for plugging the anchor hole is arranged in the auxiliary rack (4). An inclined block (42) is fixedly connected to the surface of the auxiliary rack (4). An inclined slot adapted to the inclined block (42) is formed in the auxiliary rack (4). When the plugging member (43) fits the surface of the inclined slot, one end thereof points to the positioning hole on the surface of the positioning block (41). It further includes a trigger member for making the plugging member (43) point to the anchor hole.

7. The advanced grouting device for shield roadway according to claim 6, characterized in that, The trigger member includes a guiding groove (421) formed in the bottom of the auxiliary rack (4). The guiding groove (421) is in a "7" shape. A convex block (431) is slidably connected in the guiding groove (421). The convex block (431) is fixedly connected to the plugging member (43). The convex block (431) is connected to the auxiliary rack (4) through a tension spring (432).

8. A shield tunnel advanced grouting device according to claim 7, characterized in that, A pulling cylinder (422) is fixedly connected to the bottom of the auxiliary rack (4). A pulling block (423) adapted to the convex block (431) is fixedly connected to the output end of the pulling cylinder (422). A photoelectric sensor is arranged in the positioning hole. The photoelectric sensor is electrically connected to the pulling cylinder (422).

9. The shield tunnel advanced grouting device according to claim 1, characterized in that, The support frame (1) is installed on the surface of the support plate (11) at a certain inclination angle, and the inclination angle range is 5° - 10°.

10. A shield tunnel advanced grouting device according to claim 1, characterized in that, The adjusting component includes a moving motor (12). A screw rod (13) is fixedly connected to the output end of the moving motor (12). The screw rod (13) penetrates through the support frame (1). A slider (14) is threadedly connected to the surface of the screw rod (13). The slider (14) is fixedly connected to the drill base (2), and the slider (14) is limited to slide in the support frame (1).

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