A device for testing ground stress of surrounding rock in tunnel

Abstract

The present invention relates to the technical field of ground stress monitoring, and discloses a device for testing ground stress of surrounding rock in a tunnel, comprising a mounting frame, wherein a hydraulic rod is arranged on the mounting frame, one end of the hydraulic rod is connected to a supporting tube, a power component for providing power is installed in the supporting tube, one end of the supporting tube is rotatably connected to a mounting tube, one end of the supporting tube is provided with a ball, a drill bit for drilling is arranged on the top of one end of the mounting tube, a cleaning component is installed inside a tube wall at one end of the mounting tube, a detection component is installed in the middle of one end of the mounting tube, the detection component is used to detect the ground stress of surrounding rock in the tunnel, a transmission component for transmitting power is arranged on one side of the mounting tube, a plurality of fixing holes are opened on the outer side of the mounting tube, and the stress sensor of the device can enter the hole together with the drill bit when drilling, which provides certain convenience for subsequent operations.

Description

Technical Field

[0001] The invention relates to the technical field of ground stress monitoring, and in particular to a device for testing ground stress of surrounding rocks in a tunnel. Background Art

[0002] During the tunnel construction process, the stability and safety of the surrounding rock are crucial to the overall progress of the project. Therefore, accurate and timely monitoring and evaluation of the ground stress of the surrounding rock is of great significance for preventing tunnel collapse and ensuring the safety of tunnel construction and operation. Stress is the normal force caused by stress inside the medium or on the interface. The magnitude and direction of ground stress have an important influence on the stability of underground projects and the rupture and destruction of rock masses. Therefore, accurate measurement and evaluation of the ground stress state of the surrounding rock in the tunnel is the key to ensuring the safety, stability and long-term operation of tunnel construction. With the continuous expansion of the scale and increase in complexity of tunnel projects, the requirements for monitoring the ground stress of the surrounding rock are also getting higher and higher. The emergence of the ground stress testing device for the surrounding rock in the tunnel provides a strong technical support for the safe and stable construction and operation of the tunnel project. By real-time monitoring and analysis of the changes in the ground stress of the surrounding rock, potential safety hazards can be discovered in time, and corresponding measures can be taken to deal with them, ensuring the smooth progress and long-term safe operation of the tunnel project.

[0003] The existing tunnel surrounding rock ground stress testing device, when monitoring the surrounding rock ground stress, needs to first try to use a drill bit to drill a hole, and then pull out the drill bit, and then put the stress sensor into the hole. The operation is cumbersome and brings certain inconvenience to the user, and wastes a certain amount of time; therefore, it does not meet the existing needs. In this regard, we propose a tunnel surrounding rock ground stress testing device. Summary of the invention

[0004] The present invention provides a device for testing the ground stress of surrounding rocks in a tunnel, which has the beneficial effect of allowing a stress sensor to enter a hole together with a drill bit, thereby solving the problem mentioned in the above-mentioned background technology that when monitoring the ground stress of surrounding rocks, it is necessary to first use a drill bit to drill a hole and then place the stress sensor into the hole, which is a cumbersome operation and brings certain inconvenience to the user and wastes a certain amount of time.

[0005] The present invention provides the following technical solutions: a device for testing the ground stress of surrounding rock in a tunnel, comprising a mounting frame, a hydraulic rod is provided on the mounting frame, one end of the hydraulic rod is connected to a support tube, a power component for providing power is installed in the support tube, one end of the support tube is rotatably connected to the mounting tube, one end of the support tube is provided with a ball, the ball is used to reduce the friction between the support tube and the mounting tube, a drill bit for drilling is provided at the top of one end of the mounting tube, a cleaning component is installed inside the tube wall at one end of the mounting tube, the cleaning component is used to clean debris and foreign matter inside the drill hole, a detection component is installed in the middle of one end of the mounting tube, the detection component is used to detect the ground stress of surrounding rock in the tunnel, a transmission component for transmitting power is provided on one side of the mounting tube, and a plurality of fixing holes are opened on the outer side of the mounting tube.

[0006] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, the power assembly includes a servo motor fixedly installed in a support tube, the power output end of the servo motor is fixedly connected to a ratchet, one side of the ratchet is fixedly connected to a reciprocating screw, the reciprocating screw is threadedly connected to a sliding tube, the sliding tube is slidably connected to the inside of the mounting tube, the power output end of the servo motor is rotatably connected to a rotating disk, one side of the rotating disk is fixedly connected to the mounting tube, the rotating disk is rotatably connected to a ratchet, and the ratchet is used to engage with the ratchet.

[0007] As an optional scheme of a tunnel surrounding rock ground stress testing device described in the present invention, wherein: a power output end of the servo motor is fixedly connected with a collar, the collar is located on one side of a rotating disk, a friction ring is rotatably connected in the collar, a disc is provided on one side of the friction ring, a pair of arc grooves are opened on the disc, the arc groove is provided with an air bag, a resistance column is fixedly connected to one side of the friction ring, the resistance column is slidably connected to the arc groove, and the resistance column resists the air bag, the air bag is connected to an air pipe, and mounting blocks are fixedly connected to both sides of the support pipe, a sliding bin is provided in the mounting block, the air pipe is located in the mounting block, the air pipe is communicated with the sliding bin, a fixed column is slidably connected in the sliding bin, one end of the fixed column resists with an elastic spring, the elastic spring is fixedly installed in the interior of the sliding bin, and the fixed column is used to be clamped with a fixed hole.

[0008] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, the detection component includes a stress sensor installed on one side of the drill bit, and outward expansion spring pieces are arranged on both sides of the stress sensor.

[0009] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, the cleaning component includes an air chamber arranged inside a mounting tube, a rubber sealing disk is slidably connected inside the air chamber, a round rod is fixedly connected to one side of the rubber sealing disk, one end of the round rod is fixedly connected to a drill bit, one end of the air chamber is connected to an airway, one end of the airway is provided with an inclined groove for guiding the airflow, and the airway and the inclined groove are both located on the mounting tube.

[0010] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, the transmission assembly includes a slide groove opened in a mounting tube, a sliding disk is slidably connected in the slide groove, the sliding disk is located in the slide groove, one side of the sliding disk is fixedly connected to the sliding tube, one end of the stress sensor is fixedly connected to the other side of the sliding disk, and a mounting plate is fixedly installed on the sliding disk.

[0011] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, a sliding groove is opened on one side of the mounting plate, a power rack is slidably connected in the sliding groove, a protrusion is provided at one end of the power rack, a spring is fixedly connected to one side of the protrusion, a fixed block is fixedly connected to one end of the spring, and the fixed block is fixedly installed on one side of the mounting plate.

[0012] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, one side of the power rack is meshed with a transmission gear, the transmission gear is rotatably connected to the mounting plate, one side of the transmission gear is meshed with a transmission rack, and one end of the transmission rack is fixedly connected to a sliding ring.

[0013] As an optional solution of a tunnel surrounding rock ground stress testing device described in the present invention, the sliding ring is sleeved outside the stress sensor, the sliding ring is slidably connected with a sliding groove, the sliding groove is opened on the outer shell of the stress sensor, and the sliding ring is used to contact with the outward-expanding spring piece.

[0014] The present invention has the following beneficial effects:

[0015] 1. The tunnel surrounding rock ground stress testing device uses a stress sensor installed on one side of the drill bit to enable the stress sensor to enter the hole together with the drill bit. The stress sensor can slide out of the installation tube through the reversal of the servo motor. At the same time, under the action of the transmission component, the outward expansion spring can be expanded outward, so that the stress sensor can accurately detect the surrounding rock ground stress in the tunnel, providing reliable data support for tunnel construction and subsequent maintenance.

[0016] 2. The tunnel surrounding rock ground stress testing device is equipped with a cleaning component that can automatically clean the debris and foreign matter inside the borehole, so that when the detection component slides into the installation tube, the debris and foreign matter in the hole are prevented from entering the installation tube, thereby affecting the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the detection component of the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of another viewing angle detection component of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the power assembly of the present invention.

[0021] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0022] Figure 6 It is a partial cross-sectional structural schematic diagram of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged structural diagram at A in the middle.

[0024] Figure 8 It is a schematic diagram of the structure of the slide-out installation tube of the stress sensor of the present invention.

[0025] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0026] Fig.10 For the present invention Figure 8 Enlarged structural diagram at point C in the middle.

[0027] Fig.11 It is a schematic diagram of the friction ring structure of the present invention.

[0028] Fig.12 It is a schematic diagram of the disc structure of the present invention.

[0029] Fig.13 It is a schematic diagram of the cross-sectional structure of the disc of the present invention.

[0030] In the figure: 1, mounting frame; 11, hydraulic rod; 2, support tube; 21, ball bearing; 3, power assembly; 31, servo motor; 32, ratchet; 33, reciprocating screw; 34, sliding tube; 35, rotating disk; 36, ratchet; 37, collar; 38, friction ring; 39, disc; 310, arc groove; 311, air bag; 312, resistance column; 313, air pipe; 314, mounting block; 315, sliding bin; 316, fixed column; 317, elastic spring; 4, mounting tube; 41, drill Head; 42, fixing hole; 5, cleaning assembly; 51, air chamber; 52, rubber sealing disk; 53, round rod; 54, airway; 55, inclined groove; 6, detection assembly; 61, stress sensor; 62, outward expansion spring piece; 7, transmission assembly; 71, slide groove; 72, sliding disk; 73, mounting plate; 74, sliding groove; 75, power rack; 76, raised block; 77, spring; 78, fixed block; 79, transmission gear; 710, transmission rack; 711, sliding ring; 712, sliding groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] For example, see Figure 1-Figure 13 The present invention discloses a device for testing the ground stress of surrounding rocks in a tunnel, comprising a mounting frame 1, on which a hydraulic rod 11 is provided, one end of the hydraulic rod 11 is connected to a support tube 2, a power assembly 3 for providing power is installed in the support tube 2, one end of the support tube 2 is rotatably connected to a mounting tube 4, one end of the support tube 2 is provided with a ball 21, the ball 21 is used to reduce the friction between the support tube 2 and the mounting tube 4, a drill bit 41 for drilling is provided at the top of one end of the mounting tube 4, a cleaning assembly 5 is installed inside the tube wall at one end of the mounting tube 4, the cleaning assembly 5 is used to clean debris and foreign matter inside the drill hole, a detection assembly 6 is installed in the middle of one end of the mounting tube 4, the detection assembly 6 is used to detect the ground stress of surrounding rocks in the tunnel, a transmission assembly 7 for transmitting power is provided on one side of the mounting tube 4, and a plurality of fixing holes 42 are opened on the outer side of the mounting tube 4.

[0033] In the existing tunnel surrounding rock ground stress testing device, when monitoring the surrounding rock ground stress, it is necessary to first try to use the drill bit 41 to drill a hole, and then pull out the drill bit 41, and then put the stress sensor 61 into the hole. The operation is relatively cumbersome, which brings certain inconvenience to the user and wastes a certain amount of time. The device can bring the stress sensor 61 into the hole during the drilling process of the drill bit 41. After the drilling is completed, the detection component 6 can be directly extended from the mounting tube 4 through the reverse movement of the power component 3 to detect the surrounding rock ground stress. This reduces the operation steps to a certain extent and brings certain convenience to the user.

[0034] The mounting frame 1 provides a stable working environment for the entire equipment, and the support tube 2 provides an installation support space for the entire power assembly 3, so that the force of the hydraulic rod 11 can be directly transmitted to the mounting tube 4 through the support tube 2, thereby preventing the force of the hydraulic rod 11 from affecting the operation of the power assembly 3; the design of the ball 21 reduces the friction between the support tube 2 and the mounting tube 4 when the power assembly 3 drives the mounting tube 4 and the drill bit 41 to rotate and drill, reduces the wear caused by friction, and extends the service life of the device; the drill bit 41 is located at the top of one end of the mounting tube 4, and is the main tool used by the device for drilling. Under the push of the hydraulic rod 11, the drill bit 41 can drill into the tunnel surrounding rock quickly and accurately.

[0035] The existence of the cleaning component 5 prevents debris and foreign matter from entering the installation tube 4 and affecting the interior of the device when the detection component 6 is retracted into the installation tube 4 after the stress detection is completed; the detection component 6 can accurately obtain the data of the surrounding rock stress, which provides an important reference basis for tunnel design and construction, and can also timely discover and solve potential safety hazards through data analysis and processing; the efficient operation of the transmission component 7 ensures that the entire device can work in coordination and exert maximum efficiency, and can also achieve precise regulation and optimization of each component through precise transmission control.

[0036] Example 2: This example is an explanation based on Example 1. For details, please refer to Figure 1-Figure 13 The power assembly 3 includes a servo motor 31 fixedly installed in the support tube 2, the power output end of the servo motor 31 is fixedly connected to a ratchet 32, one side of the ratchet 32 ​​is fixedly connected to a reciprocating screw 33, the reciprocating screw 33 is threadedly connected to a sliding tube 34, the sliding tube 34 is slidably connected to the inside of the mounting tube 4, the power output end of the servo motor 31 is rotatably connected to a rotating disk 35, one side of the rotating disk 35 is fixedly connected to the mounting tube 4, a ratchet 36 is rotatably connected inside the rotating disk 35, and the ratchet 36 is used to engage with the ratchet 32.

[0037] The power output end of the servo motor 31 is fixedly connected with a collar 37, which is located on one side of the rotating disk 35. A friction ring 38 is rotatably connected in the collar 37. A disc 39 is provided on one side of the friction ring 38. A pair of arc grooves 310 are opened on the disc 39. The arc groove 310 is provided with an air bag 311. A resistance column 312 is fixedly connected to one side of the friction ring 38. The resistance column 312 is slidably connected to the arc groove 310, and the resistance column 312 is in conflict with the air bag 311. The air bag 311 is connected to an air pipe 313, and mounting blocks 314 are fixedly connected on both sides of the support pipe 2. A sliding bin 315 is provided in the mounting block 314. The air pipe 313 is located in the mounting block 314. The air pipe 313 is communicated with the sliding bin 315. A fixing column 316 is slidably connected in the sliding bin 315. One end of the fixing column 316 is in contact with an elastic spring 317. The elastic spring 317 is fixedly installed in the sliding bin 315. The fixing column 316 is used to be clamped with the fixing hole 42.

[0038] The detection assembly 6 includes a stress sensor 61 installed on one side of the drill bit 41 , and outwardly expanding spring pieces 62 are arranged on both sides of the stress sensor 61 .

[0039] The cleaning assembly 5 includes an air chamber 51 arranged inside the mounting tube 4, a rubber sealing disc 52 is slidably connected inside the air chamber 51, a round rod 53 is fixedly connected to one side of the rubber sealing disc 52, one end of the round rod 53 is fixedly connected to the drill bit 41, one end of the air chamber 51 is connected to an air duct 54, one end of the air duct 54 is provided with an inclined groove 55 for guiding the airflow, and the air duct 54 and the inclined groove 55 are both located on the mounting tube 4.

[0040] The servo motor 31, as the power source of the entire system, can provide precise and controllable torque and speed. When the servo motor 31 is rotating forward, the ratchet 32 ​​and the ratchet teeth 36 are engaged. Through the engagement mechanism of the ratchet 32 ​​and the ratchet teeth 36, a torsion spring is provided between the ratchet teeth 36 and the rotating disk 35. The torsion spring can drive the ratchet teeth 36 to be always in an engaged state with the ratchet 32. When the ratchet 32 ​​is reversed, the ratchet teeth 36 can also be kept in contact with the ratchet 32. The power transmission and interruption can be realized, so that the rotating disk 35 rotates together with the servo motor 31. When the rotating disk 35 rotates, it drives the mounting tube 4 to rotate, so that the internal structure also rotates together. At this time, the reciprocating screw 33 and the sliding tube 34 are in a relatively static state, so that the sliding tube 34 will not slide under the action of the reciprocating screw 33. At the same time, through the fixed connection between the servo motor 31 and the support tube 2, the mounting tube 4 can be rotated on the support tube 2 under the action of the hydraulic rod 11, so that the drill bit 41 can drill a hole.

[0041] When the drilling is completed and the ground stress needs to be detected, the hydraulic rod 11 needs to be retracted a certain distance so that the detection component 6 can extend from the mounting tube 4, and the servo motor 31 reverses. When the servo motor 31 reverses, the ratchet 32 ​​no longer engages with the ratchet teeth 36. At the same time, through the cooperation between the ratchet 32 ​​and the ratchet teeth 36, the ratchet 32 ​​can drive the rotating disk 35 to rotate together through the ratchet teeth 36 when the ratchet 32 ​​rotates forward. When the ratchet 32 ​​reverses, the rotating disk 35 will not rotate together, so that the rotating disk 35 and the mounting tube 4 will no longer rotate together. At the same time, the reciprocating screw rod 33 is driven to rotate by the ratchet 32. Under the action of the thread connection between the sliding tube 34 and the reciprocating screw rod 33, the sliding tube 34 slides in the mounting tube 4. The cooperation between the reciprocating screw rod 33 and the sliding tube 34 converts the rotational motion into a linear motion, thereby realizing the sliding of the sliding tube 34 in the mounting tube 4.

[0042] When the servo motor 31 rotates forward, the friction between the friction ring 38 and the collar 37 causes the friction ring 38 to drive the abutment column 312 to slide in the arc groove 310, so that the abutment column 312 abuts against one side of the arc groove 310. When the servo motor 31 rotates reversely, the friction between the friction ring 38 and the collar 37 drives the friction ring 38 to rotate. At this time, the collar 37 rotates together with the power output shaft of the servo motor 31. The rotation of the friction ring 38 drives the abutment column 312 to slide in the arc groove 310, so that the abutment column 312 abuts against one side of the arc groove 310. 312 squeezes the airbag 311, so that the gas in the airbag 311 is squeezed out, and the gas enters the sliding chamber 315 through the gas pipe 313. When the gas enters the sliding chamber 315, the fixing column 316 is lifted up, so that the fixing column 316 is stuck in the fixing hole 42, so that the fixing hole 42 clamps the mounting tube 4, so that the mounting tube 4 does not rotate. This design allows the mounting tube 4 to remain fixed when the servo motor 31 is reversed, so that the cooperation between the reciprocating screw rod 33 and the sliding tube 34 can be more stable;

[0043] The stress sensor 61 is used to detect the ground stress in real time and provide key geological data for the staff. When the outward expansion spring piece 62 is deployed, the ground stress of the surrounding rock in the tunnel can be more effectively detected, and it can adapt to different working environments. The ground stress detection using the stress sensor 61 belongs to the existing technology and will not be described in detail.

[0044] The rubber sealing disc 52 is driven to slide in the air chamber 51 by the round rod 53. The design of the rubber sealing disc 52 ensures the air tightness of the air chamber 51 during the cleaning process and improves the effect of gas compression. The rubber sealing disc 52 slides in the air chamber 51, so that the gas in the air chamber 51 is compressed, and airflow is generated in the air chamber 51. The airflow in the air chamber 51 can be discharged through the air passage 54 and the inclined groove 55. The design of the inclined groove 55 can prevent debris and other sundries from entering the air passage 54 through the inclined groove 55 during the drilling process to prevent the air passage 54 from being blocked. At the same time, the airflow can be blown toward the stress sensor 61 to blow away the debris and other sundries attached to the stress sensor 61 to prevent the debris and other sundries from affecting the stress sensor 61.

[0045] Example 3: This example is an explanation based on Example 1. For details, please refer to Figure 1-Figure 13 The transmission assembly 7 includes a slide groove 71 opened in the mounting tube 4, a sliding plate 72 is slidably connected in the slide groove 71, the sliding plate 72 is located in the slide groove 71, one side of the sliding plate 72 is fixedly connected to the sliding tube 34, one end of the stress sensor 61 is fixedly connected to the other side of the sliding plate 72, and a mounting plate 73 is fixedly installed on the sliding plate 72.

[0046] A sliding groove 74 is provided on one side of the mounting plate 73, and a power rack 75 is slidably connected in the sliding groove 74. A protrusion block 76 is provided at one end of the power rack 75. A spring 77 is fixedly connected to one side of the protrusion block 76. A fixing block 78 is fixedly connected to one end of the spring 77. The fixing block 78 is fixedly installed on one side of the mounting plate 73.

[0047] One side of the power rack 75 is meshed with a transmission gear 79 , which is rotatably connected to the mounting plate 73 , and one side of the transmission gear 79 is meshed with a transmission rack 710 , one end of which is fixedly connected to a sliding ring 711 .

[0048] The sliding ring 711 is sleeved on the outside of the stress sensor 61 . The sliding ring 711 is slidably connected with a sliding groove 712 . The sliding groove 712 is provided on the outer shell of the stress sensor 61 . The sliding ring 711 is used to contact with the outwardly expanding spring piece 62 .

[0049] The rotation of the reciprocating screw rod 33 drives the sliding tube 34 to slide in the mounting tube 4. The design of the reciprocating screw rod 33 can drive the sliding tube 34 to slide in two directions. The sliding tube 34 slides and drives the sliding plate 72 to slide in the mounting tube 4 together. The design of the sliding groove 71 makes the sliding of the sliding plate 72 in the mounting tube 4 more stable. At the same time, the position of the sliding plate 72 is restricted to prevent the sliding plate 72 from deviating or shaking during the sliding process. At the same time, it can also prevent the sliding plate 72 from rotating, so that the sliding plate 72 limits the sliding tube 34, so that the sliding tube 34 can drive the sliding plate 72 to slide when the reciprocating screw rod 33 rotates, thereby providing necessary support for stable power transmission. The sliding of the sliding plate 72 can drive the stress sensor 61 and the drill bit 41 to slide together, so that the stress sensor 61 can slide out of the mounting tube 4;

[0050] When the locking cam 75 is in the state of being moved, the locking cam 73 will be in the state of being moved forward, and the locking cam 73 will be in the state of being moved forward, so that the locking cam 73 will be in the state of being moved forward, and the locking cam 73 will be in the state of being moved forward, so that the locking cam 73 will be in the state of being moved forward, and the

[0051] The power rack 75 will first slide in the mounting tube 4 along with the sliding plate 72. When the protruding block 76 on the power rack 75 contacts one end of the sliding groove 71, the power rack 75 will start to slide on the mounting plate 73. This design is conducive to the stress sensor 61 sliding out of the mounting tube 4, and then starting the transmission through the power rack 75, so that the sliding ring 711 releases the outward expansion spring piece 62, preventing the sliding ring 711 from releasing the outward expansion spring piece 62 in the mounting tube 4, so that the outward expansion spring piece 62 is stuck in the mounting tube 4 when it is unfolded; at the same time, when the detection result is When the outward-expanding spring piece 62 needs to be retracted into the stress sensor 61 after the bundle is bundled, the sliding plate 72 slides, so that the power rack 75 slides back directly under the action of the spring 77, so that the transmission rack 710 drives the sliding ring 711 to resist the outward-expanding spring piece 62, so that the outward-expanding spring piece 62 is first retracted into the stress sensor 61, and then the sliding plate 72 continues to slide to drive the stress sensor 61 back into the installation tube 4. In this way, the stress sensor 61 can be stably retracted into the installation tube 4 to prevent the outward-expanding spring piece 62 from being stuck during the retraction process;

[0052] At the same time, the power rack 75 drives the transmission gear 79 to rotate during the sliding process, and the sliding of the power rack 75 on the mounting plate 73 provides power for the transmission gear 79. When the transmission gear 79 rotates, it drives the transmission rack 710 on one side to slide. When the transmission rack 710 slides, it drives the sliding ring 711 to slide on the stress sensor 61 through the sliding groove 712, so that the sliding ring 711 slides in the direction of the drill bit 41. The design of the sliding groove 712 can provide a stable support for the sliding of the sliding ring 711, prevent the sliding ring 711 from deviating during the sliding process, and is conducive to the stable sliding of the sliding ring 711. As the sliding ring 711 slides, the sliding ring 711 no longer resists the outward expansion spring piece 62, so that the outward expansion spring piece 62 expands outward, so that the stress sensor 61 can obtain more accurate data; the power rack 75 realizes the transmission and conversion of force by meshing with the transmission gear 79. This transmission method is efficient and direct, reduces energy loss, and improves transmission efficiency. At the same time, the meshing between the transmission gear 79 and the transmission rack 710 also ensures the stability and reliability of the transmission. Through this transmission method, the structure of the transmission system can be simplified and the number of required parts can be reduced, which not only reduces the manufacturing cost, but also improves the reliability of the system and reduces the maintenance cost.

[0053] At this time, the sliding disk 72 just slides to the end point of the reciprocating screw 33, and the servo motor 31 also stops running. After the local stress detection is completed, the servo motor 31 continues to rotate, so that the reciprocating screw 33 continues to rotate, thereby driving the sliding tube 34 to slide back into the mounting tube 4, and the sliding of the sliding tube 34 into the mounting tube 4 drives the sliding disk 72 and other components back into the mounting tube 4; when the drill bit 41 slides to the outside of the mounting tube 4 together with the sliding disk 72, it drives the round rod 53 and the rubber sealing disk 52 to slide in the air chamber 51, so that the air chamber 51 can take in air through the airway 54 and the inclined groove 55, preparing for subsequent cleaning.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for testing the in-situ stress of surrounding rock in a tunnel, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a hydraulic rod (11), one end of the hydraulic rod (11) is connected to a support tube (2), a power assembly (3) for providing power is installed in the support tube (2), one end of the support tube (2) is rotatably connected to a mounting tube (4), one end of the support tube (2) is provided with a ball (21), the ball (21) is used to reduce the friction between the support tube (2) and the mounting tube (4), a drill bit (41) for drilling is provided at the top of one end of the mounting tube (4), a cleaning assembly (5) is installed inside the tube wall of one end of the mounting tube (4), the cleaning assembly (5) is used to clean debris and foreign matter inside the drill hole, a detection assembly (6) is installed in the middle of one end of the mounting tube (4), the detection assembly (6) is used to detect the ground stress of the surrounding rock in the tunnel, a transmission assembly (7) for transmitting power is provided on one side of the mounting tube (4), and a plurality of fixing holes (42) are opened on the outside of the mounting tube (4); The power assembly (3) comprises a servo motor (31) fixedly mounted in the support tube (2); a power output end of the servo motor (31) is fixedly connected to a ratchet (32); one side of the ratchet (32) is fixedly connected to a reciprocating screw rod (33); the reciprocating screw rod (33) is threadedly connected to a sliding tube (34); the sliding tube (34) is slidably connected to the inside of the mounting tube (4); a rotating disk (35) is rotatably connected to the power output end of the servo motor (31); one side of the rotating disk (35) is fixedly connected to the mounting tube (4); a ratchet (36) is rotatably connected inside the rotating disk (35); the ratchet (36) is used to engage with the ratchet (32); A collar (37) is fixedly connected to the power output end of the servo motor (31), and the collar (37) is located on one side of the rotating disk (35). A friction ring (38) is rotatably connected inside the collar (37). A disk (39) is provided on one side of the friction ring (38). A pair of arc grooves (310) are provided on the disk (39), and an air bag (311) is provided on the arc groove (310). A resistance column (312) is fixedly connected to one side of the friction ring (38), and the resistance column (312) is slidably connected to the arc groove (310), and the resistance column (312) is in resistance to the air bag (311). The bag (311) is connected to an air delivery pipe (313), and mounting blocks (314) are fixedly connected to both sides of the support pipe (2). A sliding bin (315) is provided in the mounting block (314). The air delivery pipe (313) is located in the mounting block (314). The air delivery pipe (313) is communicated with the sliding bin (315). A fixing column (316) is slidably connected in the sliding bin (315). One end of the fixing column (316) abuts against an elastic spring (317). The elastic spring (317) is fixedly installed inside the sliding bin (315). The fixing column (316) is used to be clamped with the fixing hole (42). The detection component (6) comprises a stress sensor (61) installed on one side of the drill bit (41), and outward expansion spring pieces (62) are arranged on both sides of the stress sensor (61); The transmission assembly (7) comprises a slide groove (71) provided in the mounting tube (4), a sliding plate (72) being slidably connected in the slide groove (71), the sliding plate (72) being located in the slide groove (71), one side of the sliding plate (72) being fixedly connected to the sliding tube (34), one end of the stress sensor (61) being fixedly connected to the other side of the sliding plate (72), and a mounting plate (73) being fixedly mounted on the sliding plate (72); A sliding groove (74) is provided on one side of the mounting plate (73), a power rack (75) is slidably connected in the sliding groove (74), a protruding block (76) is provided at one end of the power rack (75), a spring (77) is fixedly connected to one side of the protruding block (76), a fixing block (78) is fixedly connected to one end of the spring (77), and the fixing block (78) is fixedly mounted on one side of the mounting plate (73); One side of the power rack (75) is meshedly connected with a transmission gear (79), and the transmission gear (79) is rotationally connected to the mounting plate (73). One side of the transmission gear (79) is meshedly connected with a transmission rack (710), and one end of the transmission rack (710) is fixedly connected with a sliding ring (711).

2. A tunnel surrounding rock ground stress testing device according to claim 1, characterized in that: The cleaning assembly (5) comprises an air chamber (51) arranged inside the mounting tube (4), a rubber sealing disc (52) being slidably connected inside the air chamber (51), a round rod (53) being fixedly connected to one side of the rubber sealing disc (52), one end of the round rod (53) being fixedly connected to the drill bit (41), one end of the air chamber (51) being connected to an air passage (54), one end of the air passage (54) being provided with an inclined groove (55) for guiding air flow, and the air passage (54) and the inclined groove (55) are both located on the mounting tube (4).

3. The device for testing the in-situ stress of surrounding rock in a tunnel according to claim 1, characterized in that: The sliding ring (711) is sleeved outside the stress sensor (61), and the sliding ring (711) is slidably connected with a sliding groove (712), and the sliding groove (712) is opened on the outer shell of the stress sensor (61), and the sliding ring (711) is used to contact the outward expansion spring sheet (62).

Images