A device for monitoring deformation of initial support of a tunnel

Abstract

The application discloses a device for monitoring deformation of initial support of a tunnel, which comprises a monitoring instrument body, a lining trolley body, a rotating disc and a protective plate. A driving rod is arranged to extend into the monitoring instrument body, and one end of the driving rod extending into the monitoring instrument body is connected to the inner side of the rotating disc through a key. The outer side of the driving rod is connected to the inner side of a first bevel gear through a key, and the outer side of the first bevel gear is connected to the outer sides of two second bevel gears through meshing. The device for monitoring deformation of initial support of a tunnel is provided with the rotating disc. The rotation of the rotating disc is moved back and forth in the rotating rod through a fixed shaft, so that the rotating rod drives the swing gear to swing back and forth in the monitoring instrument body. The meshing connection between the swing gear and the engaging rack causes the detection head to move back and forth on the outer side of the guide rod, so that the monitoring range of the monitoring instrument body is larger.

Description

Technical Field

[0001] This invention relates to the field of tunnel monitoring technology, specifically to a device for monitoring the deformation of tunnel initial support. Background Technology

[0002] During the construction of railway engineering projects, since most railway lines are located in deep mountains and forests, tunnel construction accounts for a large proportion. Drainage and waterproofing are particularly important in tunnel construction. To ensure the safety of tunnel construction, it is necessary to monitor the surrounding rock extensively and conduct data analysis. Therefore, it is necessary to use devices to monitor the deformation of the initial support of the tunnel for auxiliary purposes.

[0003] The "Monitoring Device and Auxiliary Plug-in for Tunnel Construction Support Deformation" disclosed in publication number "CN215170196U" describes a monitoring device that uses pre-embedded parts welded to the initial support steel frame or embedded in impact holes. The pre-embedded parts are then plugged by an auxiliary plug-in, and anchoring agent is injected through drilling or welding to fix the pre-embedded parts. The auxiliary plug-in is then pulled out and inserted into a connector. The connector's connector handle is axially fixed to prevent it from falling off, and it can rotate circumferentially, causing the reflective plate on the connector handle to rotate. This allows for arbitrary adjustment of the reflective plate's angle. Simultaneously, the connector handle and the pre-embedded parts slide with circumferential damping, so the reflective plate can stop at any angle for convenient observation and adjustment.

[0004] When the aforementioned document monitoring device is in operation, the reflective sticker on the plug-in handle can be rotated for convenient observation and adjustment. However, in actual situations, due to changes in the initial support after tunnel excavation, sections with extremely poor surrounding rock stability are prone to collapse. Installing the monitoring instrument on the initial support or the plug-in handle could easily cause damage. However, if the monitoring instrument is installed on the lining trolley and the tunnel parameters are pre-entered into the device, the monitoring information can be fed back through the data measured by the monitoring cursor installed on the initial support, thereby ensuring the safety of tunnel construction. At the same time, when installed on the lining trolley, the monitoring instrument needs to be protected, such as cleaning the dust on the outer surface of the monitoring instrument, and other protective measures can be taken.

[0005] Therefore, we propose a device for monitoring the deformation of the initial support of a tunnel in order to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a device for monitoring the deformation of the initial support of a tunnel, in order to solve the problems mentioned in the background art. Currently, after the tunnel excavation is completed, the changes in the initial support make sections with extremely poor surrounding rock stability prone to collapse. If the monitoring instrument is installed on the initial support or the connecting rod, it is easy to cause damage. However, if the monitoring instrument is installed on the lining trolley and the tunnel parameters are pre-entered into the device, and then the device uses the data measured by the monitoring cursor installed on the initial support to provide feedback monitoring information, the safety of tunnel construction can be ensured. At the same time, when installed on the lining trolley, the monitoring instrument needs to be protected, such as cleaning the dust on the outer surface of the monitoring instrument, so as to provide good protection for the monitoring instrument.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a device for monitoring the deformation of the initial support of a tunnel, comprising a monitoring instrument body, a lining trolley body, a rotating disk, and a protective plate;

[0008] One side of the monitoring instrument body is fixed to the inner side of the lining trolley body by bolts, and a rotating disk is provided inside the monitoring instrument body, while a protective plate is provided on the outer side of the monitoring instrument body.

[0009] A drive rod extends into the interior of the monitoring instrument body, and one end of the drive rod extending into the interior of the monitoring instrument body is keyed to the inner side of the rotating disk. The outer side of the drive rod is keyed to the inner side of the first bevel gear, and the outer side of the first bevel gear is meshed with the outer side of two sets of second bevel gears.

[0010] The inner side of the second bevel gear is keyed to the outer side of the rotating worm, and a worm wheel meshes with the outer side of the rotating worm. The center of the worm wheel is connected to the inner wall of the monitoring instrument body through a connecting rod bearing. The other end of the connecting rod is keyed to the center of the eccentric wheel.

[0011] A support rod is rotatably connected to the outer side of the protective plate, and the bottom of the support rod extends into the inner wall of the slide groove. A return spring is fixedly connected to the bottom of the support rod, and the bottom of the return spring is fixed to the inner wall of the fixed rod. The bottom of the fixed rod is rotatably connected to the outer side of the monitoring instrument body.

[0012] A water tank assembly is fixedly installed inside the lining trolley body, and the output end of the water tank assembly is connected to an air supply pipe through a pump body. The other end of the air supply pipe is connected to the input end of the air jet nozzle through a flange.

[0013] Preferably, the two ends of the rotating worm are connected to the inner wall of the monitoring instrument body by bearings, and the outer side of the eccentric wheel extends out of the outer side of the monitoring instrument body and fits against the bottom of the protective plate, so that the rotating worm can rotate on the inner wall of the monitoring instrument body.

[0014] Preferably, the bottom position of the support rod is slidably disposed on the inner wall of the slide groove, and the protective plate forms a shaking structure between the support rod and the inner wall of the slide groove, thereby causing the protective plate to be shaken on the outside of the monitoring instrument body.

[0015] Preferably, a fixed shaft is fixed at the edge of the rotating disk, and the outer wall of the fixed shaft fits into the cavity inside one end of the rotating rod. A swing gear is keyed to the end of the rotating rod away from the fixed shaft. The outer side of the swing gear meshes with one end of the connecting rack. The outer side of the connecting rack is fixedly connected to one end of the detection head. One end of the detection head is slidably disposed on the outer side of the guide rod, which can easily expand the monitoring range of the detection head.

[0016] Preferably, both ends of the guide rod are fixed to the inner wall of the monitoring instrument body, and the detection head is positioned directly below the protective plate. The detection head is connected to the outer side of the guide rod via a rack and pinion mechanism to form a back-and-forth sliding structure, which facilitates the back-and-forth movement of the detection head.

[0017] Preferably, the oscillating gear and the rotating rod are connected by a key, and the welded joint between the rotating rod and the oscillating gear is connected to the inner wall of the monitoring instrument body by a bearing. The rotating rod forms a reciprocating rotation structure with the inner wall of the monitoring instrument body through a fixed shaft, so that the rotating rod and the oscillating gear can rotate on the inner wall of the monitoring instrument body.

[0018] Preferably, the lower position of the jet nozzle is slidably disposed on the outer side of the guide rail fixed inside the protective plate, the lower position of the jet nozzle is rotatably connected to the top position of the movable rod, and the other end of the movable rod is rotatably connected to the outer side of the rotating shaft. The shaft end of the rotating shaft is fixed to the top position of the extrusion rod, and the outer side of the extrusion rod is connected to the inside of the monitoring instrument body through a connecting spring, which can easily expand the dust suppression effect.

[0019] Preferably, the movable rods are distributed in two sets about the vertical center line of the extrusion rod, and the air nozzles form a sliding structure between the movable rods and the outer side of the guide rail, which facilitates the sliding of the air nozzles on the outer side of the guide rail.

[0020] Preferably, the extrusion rod forms an elastic sliding structure with the interior of the monitoring instrument body through a connecting spring, and the bottom position of the bonding plate is bonded to the outer position of the monitoring instrument body, so that the extrusion rod performs extrusion processing through the monitoring instrument body.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The device for monitoring the initial support deformation of the tunnel is equipped with a rotating disk. The rotation of the rotating disk moves back and forth inside the rotating rod through a fixed shaft, which causes the rotating rod to drive the swing gear to swing back and forth inside the monitoring instrument body. The meshing connection between the swing gear and the connecting rack causes the detection head to move back and forth outside the guide rod, which can make the detection range of the monitoring instrument body larger.

[0023] 2. The device for monitoring the initial support deformation of the tunnel is equipped with a drive rod. The shaft end of the drive rod drives the meshing second bevel gear to rotate through the keyed first bevel gear. The rotating worm gear keyed to the outside of the second bevel gear rotates inside the monitoring instrument body and also drives the meshing worm wheel to rotate. At this time, the worm wheel can effectively drive the eccentric wheel to rotate through the connecting rod. The outer sides of the two sets of eccentric wheels will squeeze the inner side of the protective plate, which can make the protective plate shake through the support rod, slide groove, return spring and fixing rod. At this time, the dust on the outside of the protective plate can be shaken and cleaned.

[0024] 3. The device for monitoring the initial support deformation of the tunnel is equipped with a protective plate. The movement of the protective plate causes the extending fitting plate under the protective plate to press against the outside of the monitoring instrument body, causing the pressing rod to deform the connecting spring. In addition, the rotating shaft connected to the top of the pressing rod can drive two sets of movable rods to move. At this time, the air nozzle connected to the top of the outer side of the movable rod will move back and forth on the outside of the guide rail, supplying water to the inside of the air pipe through the water tank assembly, and spraying water back and forth through the air nozzle. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the main cross-sectional structure of the monitoring instrument body of the present invention;

[0027] Figure 3 This is a schematic diagram of the rear cross-sectional structure of the rotating disk of the present invention;

[0028] Figure 4 This is a schematic diagram of the worm gear structure from the side view.

[0029] Figure 5 This is a schematic diagram of the main cross-sectional structure of the fixing rod of the present invention;

[0030] Figure 6 For the present invention Figure 1Enlarged structural diagram at point A in the middle;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the extrusion rod of the present invention.

[0032] In the diagram: 1. Monitoring instrument body; 2. Lining trolley body; 3. Drive rod; 4. Rotating disk; 401. Fixed shaft; 402. Rotating rod; 403. Swing gear; 404. Connecting rack; 405. Detection head; 406. Guide rod; 5. First bevel gear; 6. Second bevel gear; 7. Rotating worm gear; 8. Worm wheel; 9. Connecting rod; 10. Eccentric wheel; 11. Protective plate; 12. Support rod; 13. Slide groove; 14. Return spring; 15. Fixed rod; 16. Water tank assembly; 17. Air supply pipe; 18. Air nozzle; 1801. Movable rod; 1802. Rotating shaft; 1803. Extrusion rod; 1804. Connecting spring; 1805. Adhesive plate; 19. Guide rail. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-7 The present invention provides a technical solution: a device for monitoring the deformation of the initial support of a tunnel, comprising a monitoring instrument body 1, a lining trolley body 2, a rotating disk 4, and a protective plate 11;

[0035] One side of the monitoring instrument body 1 is fixed to the inner side of the lining trolley body 2 by bolts, and a rotating disk 4 is provided inside the monitoring instrument body 1, and a protective plate 11 is provided on the outer side of the monitoring instrument body 1.

[0036] A drive rod 3 extends into the interior of the monitoring instrument body 1, and one end of the drive rod 3 extending into the monitoring instrument body 1 is keyed to the inner side of the rotating disk 4. A fixed shaft 401 is fixed at the edge of the rotating disk 4, and the outer wall of the fixed shaft 401 fits into the cavity inside one end of the rotating rod 402. The swing gear 403 is keyed to the rotating rod 402, and the welded joint between the rotating rod 402 and the swing gear 403 is connected to the inner wall of the monitoring instrument body 1 by a bearing. The rotating rod 402 forms a back-and-forth rotation structure with the fixed shaft 401 and the inner wall of the monitoring instrument body 1. The swing gear 403 is keyed to the end of the rotating rod 402 away from the fixed shaft 401. The outer side of the swing gear 403 meshes with one end of the connecting rack 404. The outer side of the connecting rack 404 is fixedly connected to one end of the detection head 405. One end of the detection head 405 is slidably disposed on the outer side of the guide rod 406. Both ends of the guide rod 406 are fixed to the inner wall of the monitoring instrument body 1, and the detection head 405 is located directly below the protective plate 11. The detection head 405 forms a back-and-forth sliding structure with the outer side of the guide rod 406 through the connecting rack 404. The outer side of the drive rod 3 is keyed to the inner side of the first bevel gear 5, and the outer side of the first bevel gear 5 is meshed with the outer side of the two sets of second bevel gears 6. The inner side of the second bevel gear 6 is keyed to the outer side of the rotating worm 7. The two ends of the rotating worm 7 are bearing connected to the inner wall of the monitoring instrument body 1. The outer side of the eccentric wheel 10 extends out of the outer side of the monitoring instrument body 1 and is in contact with the bottom of the protective plate 11. A worm gear 8 is engaged with the outer side of the rotating worm 7, and the center of the worm gear 8 is connected to the inner wall of the monitoring instrument body 1 via a connecting rod 9 bearing. The other end of the connecting rod 9 is keyed to the center of the eccentric wheel 10. A support rod 12 is rotatably connected to the outer side of the protective plate 11. The bottom of the support rod 12 is slidably disposed on the inner wall of the slide groove 13, and the protective plate 11 forms a shaking structure between the support rod 12 and the inner wall of the slide groove 13. The bottom of the support rod 12 extends into the inner wall of the slide groove 13, and a return spring 14 is fixedly connected to the bottom of the support rod 12. The bottom of the return spring 14 is fixed to the inner wall of the fixed rod 15, and the bottom of the fixed rod 15 is rotatably connected to the outer side of the monitoring instrument body 1.

[0037] Combined with appendix Figure 1 -Appendix Figure 3First, the monitoring instrument body 1 is bolted to the outside of the lining trolley body 2. The water tank assembly 16 is then connected to the pump and air supply pipe 17. One end of the air supply pipe 17 is connected to the air nozzle 18 via a flange. When using the monitoring instrument body 1 for detection, it is activated. At this time, the motor connected to the drive rod 3 is started, causing the drive rod 3 to rotate the keyed rotating disk 4. The fixed shaft 401, keyed to the outer edge of the rotating disk 4, will also rotate via the rotating disk 4, causing... The fixed shaft 401 rotates within the cavity of the rotating rod 402. At this time, the rotating rod 402 will drive the keyed swing gear 403 to swing, causing the rotating rod 402 and the swing gear 403 to swing inside the monitoring instrument body 1. In addition, the connecting rack 404 meshed with the outer position of the swing gear 403 will also drive the detection head 405 to move back and forth outside the guide rod 406, so that the detection head 405 moves back and forth under the transparent protective plate 11. At this time, the monitoring range can be effectively expanded for use.

[0038] A water tank assembly 16 is fixedly installed inside the lining trolley body 2. The output end of the water tank assembly 16 is connected to an air supply pipe 17 via a pump body. The other end of the air supply pipe 17 is connected to the input end of an air jet nozzle 18 via a flange. The lower part of the air jet nozzle 18 is slidably positioned outside a guide rail 19 fixed inside the protective plate 11. The lower part of the air jet nozzle 18 is rotatably connected to the top end of a movable rod 1801. The other end of the movable rod 1801 is rotatably connected to the outside of a rotating shaft 1802. The shaft of the rotating shaft 1802... The end position is fixed at the top position of the extrusion rod 1803. The extrusion rod 1803 forms an elastic sliding structure with the inside of the monitoring instrument body 1 through the connecting spring 1804, and the bottom position of the bonding plate 1805 is bonded to the outside position of the monitoring instrument body 1. There are two sets of movable rods 1801 distributed about the vertical center line of the extrusion rod 1803, and the jet nozzle 18 forms a sliding structure with the outside of the guide rail 19 through the movable rod 1801. The outside of the extrusion rod 1803 is connected to the inside of the monitoring instrument body 1 through the connecting spring 1804.

[0039] In addition, please refer to the attached document. Figure 2 -Appendix Figure 5When dust and other impurities easily accumulate inside the tunnel, affecting the monitoring efficiency of the monitoring instrument body 1, the motor of the drive rod 3 rotates, and the shaft end of the drive rod 3 drives the other two sets of second bevel gears 6 to rotate via the first bevel gear 5. When the two sets of second bevel gears 6 rotate, the rotating worm 7, keyed to the inner side of the second bevel gear 6, rotates inside the monitoring instrument body 1. As the rotating worm 7 rotates, it drives the keyed worm wheel 8 to rotate. The connecting rod fixedly connected to the center of the worm wheel 8... 9 will also drive the eccentric wheel 10 to rotate, causing the outermost part of the eccentric wheel 10 to rotate inside the monitoring instrument body 1 and press against the inner side of the protective plate 11. Since the bottom of the protective plate 11 is also connected to the support rod 12, it drives the return spring 14 to slide inside the slide groove 13. At this time, the protective plate 11 can slide back and forth in the slide groove 13 inside the return spring 14 through the support rod 12. This can effectively drive the protective plate 11 to shake back and forth, thereby cleaning the dust on the outside of the protective plate 11. In addition, in order to perform dust suppression treatment, combined with the attached Figure 1 Appendix Figure 6 and attached Figure 7 By activating the pump of the water tank assembly 16, the water tank assembly 16 will deliver air to the interior of the air jet 18 through the air supply pipe 17. Subsequently, due to the back-and-forth movement of the protective plate 11, the bonding plate 1805 will drive the extrusion rod 1803 to move through the connecting spring 1804. The rotating shaft 1802, which is rotatably connected to the top of the extrusion rod 1803, will also drive the two sets of movable rods 1801 to move outside the guide rail 19. The dust suppression range can be increased by moving the air jet 18, thereby completing a series of tasks.

[0040] Working principle: When using this device to monitor the initial support deformation of a tunnel, combined with the attached... Figure 1 -Appendix Figure 7First, the monitoring instrument body 1 is fixed to the outside of the lining trolley body 2 with bolts, and the water tank assembly 16 is connected to the pump and the air supply pipe 17. At this time, the motor connected to the drive rod 3 can be started, so that the drive rod 3 will drive the keyed rotating disk 4 to rotate. At this time, the fixed shaft 401 keyed to the outer edge of the rotating disk 4 will also rotate through the rotating disk 4, so that the fixed shaft 401 rotates in the cavity of the rotating rod 402. This can effectively expand the monitoring range for use. When dust and other impurities are easily generated inside the tunnel, affecting the monitoring efficiency of the monitoring instrument body 1, when the motor of the drive rod 3 is rotating, the inner side of the second bevel gear 6 keyed to The rotating worm gear 7 will rotate inside the monitoring instrument body 1. At this time, the connecting rod 9, which is fixedly connected to the center of the worm wheel 8, will also drive the eccentric wheel 10 to rotate. This will effectively drive the protective plate 11 to shake back and forth, thereby cleaning the dust on the outside of the protective plate 11. In addition, for dust suppression, the back and forth movement of the protective plate 11 will cause the bonding plate 1805 to drive the pressing rod 1803 to move through the connecting spring 1804. The rotating shaft 1802, which is rotatably connected to the top of the pressing rod 1803, will also drive the two sets of movable rods 1801 to move outside the guide rail 19. The dust suppression range can be increased by moving the air nozzle 18, thereby completing a series of tasks.

[0041] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate orientations or positional relationships based on the accompanying drawings, and are used only for ease of description and simplification, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] 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 device for monitoring the deformation of the initial support of a tunnel, comprising a monitoring instrument body (1), a lining trolley body (2), a rotating disk (4), and a protective plate (11). in, One side of the monitoring instrument body (1) is fixed to the inner side of the lining trolley body (2) by bolts, and a rotating disk (4) is provided inside the monitoring instrument body (1), and a protective plate (11) is provided on the outer side of the monitoring instrument body (1). Its characteristic is that it further includes: A drive rod (3) extends into the interior of the monitoring instrument body (1), and one end of the drive rod (3) extending into the interior of the monitoring instrument body (1) is keyed to the inner side of the rotating disk (4). The outer side of the drive rod (3) is keyed to the inner side of the first bevel gear (5), and the outer side of the first bevel gear (5) is meshed with the outer side of two sets of second bevel gears (6). The inner position of the second bevel gear (6) is keyed to the outer position of the rotating worm (7), the outer position of the rotating worm (7) is engaged with the worm wheel (8), and the center of the worm wheel (8) is connected to the inner wall of the monitoring instrument body (1) through the connecting rod (9) bearing. The other end of the connecting rod (9) is keyed to the center of the eccentric wheel (10). The outer side of the protective plate (11) is rotatably connected to a support rod (12), and the bottom of the support rod (12) extends into the inner wall of the slide groove (13). A return spring (14) is fixedly connected to the bottom of the support rod (12), and the bottom of the return spring (14) is fixed to the inner wall of the fixing rod (15). The bottom of the fixing rod (15) is rotatably connected to the outer side of the monitoring instrument body (1). A water tank assembly (16) is fixedly installed inside the lining trolley body (2), and the output end of the water tank assembly (16) is connected to an air supply pipe (17) through a pump body. The other end of the air supply pipe (17) is connected to the input end of the air jet (18) through a flange. The two ends of the rotating worm (7) are connected to the inner wall of the monitoring instrument body (1) by bearings, and the outer side of the eccentric wheel (10) extends out of the outer side of the monitoring instrument body (1) and fits against the bottom of the protective plate (11). A fixed shaft (401) is fixed at the edge of the rotating disk (4), and the outer wall of the fixed shaft (401) is attached to the cavity inside one end of the rotating rod (402). A swing gear (403) is keyed to one end of the rotating rod (402) away from the fixed shaft (401). The outer side of the swing gear (403) meshes with one end of the connecting rack (404). The outer side of the connecting rack (404) is fixedly connected to one end of the detection head (405). One end of the detection head (405) is slidably disposed on the outside of the guide rod (406). Both ends of the guide rod (406) are fixed to the inner wall of the monitoring instrument body (1), and the detection head (405) is located directly below the protective plate (11). The detection head (405) forms a back-and-forth sliding structure between the connecting rack (404) and the outer side of the guide rod (406). The swing gear (403) and the rotating rod (402) are connected by a key, and the rotating rod (402) and the swing gear (403) are connected by a bearing at the weld point to the inner wall of the monitoring instrument body (1). The rotating rod (402) forms a back-and-forth rotating structure with the inner wall of the monitoring instrument body (1) through the fixed shaft (401).

2. The device for monitoring the deformation of initial tunnel support according to claim 1, characterized in that: The bottom position of the support rod (12) is slidably disposed on the inner wall of the slide groove (13), and the protective plate (11) forms a shaking structure between the support rod (12) and the inner wall of the slide groove (13).

3. The device for monitoring the deformation of initial tunnel support according to claim 1, characterized in that: The lower position of the jet nozzle (18) is slidably disposed on the outside of the guide rail (19) fixed inside the protective plate (11). The lower position of the jet nozzle (18) is rotatably connected to the top position of the movable rod (1801), and the other end of the movable rod (1801) is rotatably connected to the outside position of the rotating shaft (1802). The shaft end of the rotating shaft (1802) is fixed to the top position of the extrusion rod (1803), and the outside of the extrusion rod (1803) is connected to the inside of the monitoring instrument body (1) by a connecting spring (1804). The bottom position of the extrusion rod (1803) extends out of the bottom position of the protective plate (11) and is fixed to the top position of the bonding plate (1805).

4. The device for monitoring the deformation of initial tunnel support according to claim 3, characterized in that: The movable rod (1801) is distributed in two sets about the vertical center line of the extrusion rod (1803), and the jet nozzle (18) forms a sliding structure between the movable rod (1801) and the outer side of the guide rail (19).

5. The device for monitoring the deformation of initial tunnel support according to claim 3, characterized in that: The compression rod (1803) forms an elastic sliding structure between the connecting spring (1804) and the interior of the monitoring instrument body (1), and the bottom position of the bonding plate (1805) is bonded to the outer position of the monitoring instrument body (1).

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