Sleeve dismounting and mounting structure for tunnel surrounding rock pre-embedded sensor

Abstract

The utility model discloses a sleeve disassembly and assembly structure for a tunnel surrounding rock pre-embedded sensor, relates to the technical field of tunnel surrounding rock pre-embedded sensors, and aims to solve the problems that an existing sleeve and a drill hole are usually connected and fixed through bolts, the sleeve is troublesome to disassemble when needing to be disassembled, and the construction cost is low. The device comprises a sleeve, the sleeve is arranged in the tunnel surrounding rock, a drill hole is formed in the surface of the tunnel surrounding rock, the sleeve is clamped in the drill hole, and the length and the diameter of the sleeve are consistent with the size of the drill hole; the step groove is integrally formed in the surface of the tunnel surrounding rock, a step plate is integrally formed at the front end of the sleeve, the step plate is clamped in the step groove when the sleeve and the drill hole are clamped, a connecting piece is arranged on the inner side of the interior of the step groove, and the step plate is attached to the connecting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel surrounding rock pre-embedded sensors, in particular to a sleeve disassembly and assembly structure for tunnel surrounding rock pre-embedded sensors. Background Art

[0002] Tunnel excavation disturbs the rock medium, changes the stress distribution and strength within the rock, and excessive concentration of stress and excessive reduction in strength will cause deformation and damage to the surrounding rock. In order to achieve long-term stability during deep and long tunnel excavation and ensure safe and sustainable tunnel construction, it is very important to predict and monitor the surrounding rock characteristics and adverse geology in front of and on the sides of the tunnel face in advance. Distributed fiber grating sensing technology is a relatively mature monitoring technology. It is based on the principle of Brillouin light frequency domain scattering, performs optical time domain analysis, and senses object deformation. When laser passes through optical fiber, a variety of scattering effects will occur, and their types are related to factors such as optical fiber strain and temperature. Changes in strain and temperature in the optical fiber can cause changes in the Brillouin frequency shift.

[0003] Usually, when pre-buried monitoring sensors in a tunnel, a hole is drilled in the tunnel surrounding rock, a sleeve is inserted into the drilled hole, the sensor is inserted into the sleeve, and cement is poured to seal the sensor in the sleeve. However, the sleeve and the drilled hole are usually connected and fixed with bolts, which is troublesome when the sleeve needs to be disassembled, and it is inconvenient to replace the sensor assembly. Utility Model Content

[0004] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a sleeve disassembly and assembly structure for a sensor embedded in tunnel surrounding rock, so that the sleeve can be disassembled and replaced quickly and conveniently.

[0005] Technical solution: This is a sleeve disassembly and assembly structure used by Yongxi for tunnel surrounding rock embedded sensors. The sleeve disassembly and assembly structure includes:

[0006] The sleeve is arranged in a borehole opened in the surrounding rock of the tunnel, and a step plate is integrally formed at its front end, and connecting blocks are symmetrically arranged on both sides of the front end of the step plate;

[0007] The connector is connected to the sleeve and is arranged in a step groove opened on the surrounding rock of the tunnel. The rear end surface of the connector is symmetrically provided with protrusions.

[0008] The connection block is provided with a groove inside for engaging with a protrusion, and the sleeve is fixed to the rear end of the connector through the engaging connection between the connection block and the protrusion, thereby realizing a detachable connection between the sleeve and the surrounding rock of the tunnel.

[0009] Furthermore, a baffle is provided at one end of the protrusion of the sleeve disassembly and assembly structure, and the baffle is magnetically connected to the connecting block.

[0010] The sleeve of the sleeve disassembly and assembly structure is provided with a grouting pipe and an exhaust pipe inside, and the exhaust pipe is located above the grouting pipe, and electrodes are evenly distributed on the surface of the exhaust pipe.

[0011] The exhaust pipe of the sleeve disassembly structure is provided with distributed fixed-point optical cables and electrical cables on the outside. The distributed fixed-point optical cables and electrical cables are fixed on the outside of the exhaust pipe by winding insulating tapes, and cement slurry is poured into the sleeve.

[0012] The front end of the exhaust pipe of the sleeve disassembly and assembly structure is provided with an umbrella-shaped protective cover.

[0013] A cover plate is provided at the rear end of the step plate of the sleeve disassembly and assembly structure, and the cover plate is fixed to the rear end of the step plate by bolt connection, and the exhaust pipe, cable, distributed fixed-point optical cable and grouting pipe pass through the opening on the cover plate.

[0014] A rubber gasket is arranged between the cover plate and the step plate of the sleeve disassembly and assembly structure.

[0015] Beneficial effect: Compared with the prior art, the advantages of the utility model are as follows: the structure is achieved by opening a borehole on the surface of the tunnel surrounding rock, and setting a step groove at the front end of the borehole, fixing the connecting piece in the step groove by bolts, engaging the sleeve with the borehole, and engaging the step plate at the front end of the sleeve into the step groove, so that the step plate and the connecting piece are engaged, and rotating the sleeve clockwise to engage the protrusion with the connecting block, thereby fixing the sleeve, and when the sleeve needs to be removed, rotating the sleeve in the opposite direction to disengage the connecting block from the protrusion, and then the sleeve can be removed from the inside of the borehole, making it convenient to replace the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the structural installation diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the connector of the utility model;

[0018] Figure 3 This is a schematic diagram of the sleeve structure of the utility model;

[0019] In the figure: 1. Connector; 2. Bump; 3. Connecting block; 4. Baffle; 5. Expansion bolt; 6. Step plate; 7. Sleeve; 8. Step groove; 9. Drill hole; 10. Grouting pipe; 11. Exhaust pipe; 12. Umbrella-shaped protective cover; 13. Insulating tape; 14. Electrode; 15. Distributed fixed-point optical cable; 16. Cable; 17. Cover plate; 18. Rubber gasket; 19. Cement slurry; 20. Tunnel surrounding rock. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 3 As shown, the sleeve disassembly and assembly structure of the tunnel surrounding rock pre-embedded sensor of the utility model comprises a sleeve 7, which is arranged inside the tunnel surrounding rock 20, and a borehole 9 is arranged on the surface of the tunnel surrounding rock 20, and the sleeve 7 is engaged in the borehole 9, and the length and diameter of the sleeve 7 are consistent with the size of the borehole 9;

[0022] Also includes:

[0023] The step groove 8 is integrally formed and arranged on the surface of the tunnel surrounding rock 20. The front end of the sleeve 7 is integrally formed with a step plate 6, and when the sleeve 7 is engaged with the borehole 9, the step plate 6 is engaged in the step groove 8. A connector 1 is arranged on the inner side of the step groove 8, and the step plate 6 is fitted with the connector 1. The connector 1 is fixed inside the step groove 8 by an expansion bolt 5. The rear end surface of the connector 1 is symmetrically provided with a protrusion 2. The front ends of the step plate 6 are symmetrically provided with a connection block 3. The connection block 3 is provided with a groove inside to engage with the protrusion 2. A baffle 4 is arranged at one end of the protrusion 2, and the baffle 4 is magnetically connected to the connection block 3. The baffle 4 can limit the rotation angle of the sleeve 7, and the magnetic connection can stabilize the sleeve 7 from being easily loosened in the opposite direction. That is, the sleeve 7 is fixed to the rear end of the connector 1 by the engagement connection between the connection block 3 and the protrusion 2.

[0024] A grouting pipe 10 is provided inside the sleeve 7, and an exhaust pipe 11 is provided inside the sleeve 7, and the exhaust pipe 11 is located above the grouting pipe 10. Electrodes 14 are evenly distributed on the surface of the exhaust pipe 11, which is convenient for pouring cement slurry 19 into the sleeve 7. Distributed fixed-point optical cables 15 and cables 16 are provided outside the exhaust pipe 11, and the distributed fixed-point optical cables 15 and cables 16 are fixed to the outside of the exhaust pipe 11 by winding with insulating tape 13. Cement slurry 19 is poured into the sleeve 7, and cement is poured into the interior of the sleeve 7 by exhaust back slurry method, which is convenient for enclosing the distributed fixed-point optical cables 15 and cables 16 in the sleeve 7. An umbrella-shaped protective cover 12 is provided at the front end of the exhaust pipe 11 to protect the front end of the exhaust pipe 11.

[0025] In addition, the rear end of the step plate 6 of the sleeve disassembly structure is provided with a cover plate 17, which is fixed to the rear end of the step plate 6 by bolt connection, and the exhaust pipe 11, the cable 16, the distributed fixed-point optical cable 15 and the grouting pipe 10 pass through the opening on the cover plate 17, and the front end of the sleeve 7 can be closed when the slurry is poured inside the sleeve 7. A rubber gasket 18 is provided between the cover plate 17 and the step plate 6 to improve the sealing performance.

[0026] Working principle: a borehole 9 is opened on the surface of the tunnel surrounding rock 20, and a step groove 8 is set at the front end of the borehole 9, the connecting piece 1 is fixed in the step groove 8 by bolts, the sleeve 7 is engaged with the borehole 9, and the step plate 6 at the front end of the sleeve 7 is engaged into the step groove 8, so that the step plate 6 is engaged with the connecting piece 1, and the sleeve 7 is rotated clockwise to engage the protrusion 2 with the connecting block 3, thereby fixing the sleeve 7. When the sleeve 7 needs to be removed, the sleeve 7 is rotated in the opposite direction to disengage the connecting block 3 from the protrusion 2, and the sleeve 7 can be removed from the inside of the borehole 9, so that the sleeve 7 can be conveniently replaced.

Claims

1. A sleeve disassembly and assembly structure for a tunnel surrounding rock embedded sensor, characterized in that: The sleeve disassembly and assembly structure comprises: The sleeve (7) is arranged in a borehole (9) opened in the tunnel surrounding rock (20), and a step plate (6) is integrally formed at the front end thereof, and connecting blocks (3) are symmetrically arranged on both sides of the front end of the step plate (6); A connecting piece (1) is connected to a sleeve (7) and is arranged in a step groove (8) opened on the tunnel surrounding rock (20). The rear end surface of the connecting piece (1) is symmetrically provided with a protrusion (2); The connection block (3) is provided with a groove inside for engaging with the protrusion (2), and the sleeve (7) is fixed to the rear end of the connection piece (1) through the engaging connection between the connection block (3) and the protrusion (2), thereby realizing a detachable connection between the sleeve and the tunnel surrounding rock (20).

2. According to claim 1, the sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors is characterized in that: A baffle (4) is provided at one end of the protrusion (2), and the baffle (4) is magnetically connected to the connection block (3).

3. The sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors according to claim 1 is characterized in that: A grouting pipe (10) and an exhaust pipe (11) are arranged inside the sleeve (7), and the exhaust pipe (11) is located above the grouting pipe (10). Electrodes (14) are evenly distributed on the surface of the exhaust pipe (11).

4. The sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors according to claim 3 is characterized in that: A distributed fixed-point optical cable (15) and an electric cable (16) are arranged outside the exhaust pipe (11); the distributed fixed-point optical cable (15) and the electric cable (16) are fixed to the outside of the exhaust pipe (11) by winding an insulating tape (13); and cement slurry (19) is poured into the interior of the sleeve (7).

5. The sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors according to claim 3 is characterized in that: An umbrella-shaped protective cover (12) is provided at the front end of the exhaust pipe (11).

6. The sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors according to claim 1, characterized in that: A cover plate (17) is provided at the rear end of the step plate (6), the cover plate (17) is fixed to the rear end of the step plate (6) by bolt connection, and the exhaust pipe (11), the cable (16), the distributed fixed-point optical cable (15) and the grouting pipe (10) pass through the opening on the cover plate (17).

7. The sleeve disassembly and assembly structure for tunnel surrounding rock embedded sensors according to claim 6, characterized in that: A rubber gasket (18) is provided between the cover plate (17) and the step plate (6).

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