Tunnel surrounding rock reinforcing structure

Abstract

The invention provides a tunnel surrounding rock reinforcing structure, and relates to the technical field of tunnel surrounding rock reinforcing. Comprising a bottom plate, a side plate is fixedly arranged in the middle of the top face of the bottom plate, a pair of trapezoidal channel steel is fixedly arranged on the left side face and the right side face of the side plate, a turnover plate is arranged in the middle in the trapezoidal channel steel, a folding plate is arranged on the outer side of the turnover plate, a baffle is fixedly arranged on the outer side edge of the folding plate, and the turnover plate is connected with the folding plate through a folding mechanism; a cross beam is arranged over the side plates, an arc-shaped transverse plate is fixedly arranged on the top face of the cross beam, a plurality of arc-shaped supporting beams are inserted into the arc-shaped transverse plate, and the cross beam is connected with the arc-shaped supporting beams through a linkage mechanism. A pair of U-shaped clamping plates is fixedly arranged on the bottom face of the cross beam, a pair of extending plates is fixedly arranged on the bottom faces of the U-shaped clamping plates, lifting plates are arranged between the extending plates and the side plates, and the lifting plates are connected with the extending plates through sliding mechanisms. Through cooperative use of all the mechanisms, it is ensured that the device can be tightly combined with tunnel surrounding rock, the overall stability is improved, effective supporting force is provided for the tunnel surrounding rock, and the height can be conveniently adjusted according to needs.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel surrounding rock reinforcement, and in particular to a tunnel surrounding rock reinforcement structure. Background Art

[0002] During the maintenance process, the tunnel needs to be temporarily fixed, which is achieved by reinforcing the structure.

[0003] A Chinese utility model patent discloses a tunnel surrounding rock reinforcement structure (publication number: CN206987836U), which includes two sets of I-beam arch frames and multiple collapse tubes, so that the middle part of each collapse tube is located above the front I-beam arch frame, and the rear end part is located on the rear I-beam arch frame, and the collapse tube is sandwiched between the two I-beam arch frames.

[0004] However, the above patent and the existing reinforcement structure are not convenient to move during use, and it is not convenient to adjust the height according to needs, and the scope of application is limited. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a tunnel surrounding rock reinforcement structure. The present invention adopts the following technical solutions: A tunnel surrounding rock reinforcement structure comprises a bottom plate, wherein four corners of the bottom surface of the bottom plate are provided with load-bearing rollers; A vertically distributed side plate is fixedly arranged in the middle of the top surface of the bottom plate, and a pair of symmetrically distributed trapezoidal channel steels are fixedly arranged on the left and right sides of the side plate, and a movable hinged flip plate is arranged in the middle of each of the trapezoidal channel steels, and a movable hinged folding plate is arranged on the outer side of each of the flip plates, and a vertically distributed baffle is fixedly arranged on the outer side of each of the folding plates, and each flip plate is connected to the folding plate on the corresponding side through a folding mechanism; A parallel cross beam is arranged directly above the side plate, a curved cross plate is fixedly arranged on the top surface of the cross beam, a plurality of equally spaced T-shaped sliding holes are opened on the curved cross plate, a plurality of curved support beams alternately arranged on the left and right are slidably inserted inside the plurality of T-shaped sliding holes, and the cross beam is connected to the plurality of curved support beams through a linkage mechanism; A pair of U-shaped pallets are fixedly provided on the bottom surface of the crossbeam, and a pair of symmetrically distributed extension plates are fixedly provided on the bottom surface of each of the U-shaped pallets. A vertically sliding lifting plate is provided between each of the extension plates and the side plates, and each of the lifting plates is connected to the corresponding extension plate through a sliding mechanism.

[0006] Preferably, the folding mechanism includes a linkage gear, a first pin shaft is inserted into the inner side of the flip plate and is fixedly connected thereto, both ends of the first pin shaft are rotatably inserted on the trapezoidal channel steel, a second pin shaft is inserted into the outer side of the flip plate and is fixedly connected thereto, a third pin shaft is inserted into the inner side of the folding plate and is fixedly connected thereto, both ends of the second pin shaft and both ends of the third pin shaft are sleeved with concentrically fixed linkage gears, and an adjacent pair of linkage gears are meshingly connected.

[0007] Preferably, a pair of symmetrically distributed fourth pins are rotatably inserted on the outer side surface of the trapezoidal channel steel, a driven connecting rod is fixedly provided at the middle part of each of the fourth pins, each of the driven connecting rods is distributed parallel to the flip plate, and an L-shaped connecting rod is movably hinged at the outer end of each of the driven connecting rods, and the corner of each of the L-shaped connecting rods is movably hinged to the end corresponding to the second pin, and the outer end of each of the L-shaped connecting rods is movably hinged to the end corresponding to the third pin.

[0008] Preferably, the outer end portion of each of the fourth pin shafts is sleeved with a concentrically fixed driven gear, a pair of symmetrically distributed T-shaped through holes are opened on the side plate, a first electric telescopic cylinder with the telescopic end facing upward is fixedly provided on the inner bottom of each of the T-shaped through holes, a U-shaped rack with the opening facing downward is fixedly provided on the end of the telescopic rod of each of the first electric telescopic cylinders, and both side edges of each U-shaped rack are meshed and connected with the driven gear on the corresponding side.

[0009] Preferably, the linkage mechanism includes an arc-shaped rack and a fixed gear. An arc-shaped rack is fixedly provided on the inner arc surface of each arc-shaped support beam. A plurality of evenly spaced flat through holes are opened on the crossbeam. Each of the flat through holes is connected to an adjacent T-shaped slide hole. A linkage shaft is rotatably inserted inside each of the flat through holes. A concentrically fixed fixed gear is sleeved on the middle part of each of the linkage shafts. Each of the fixed gears is meshed and connected with an adjacent arc-shaped rack.

[0010] Preferably, the crossbeam is provided with a number of equally spaced rectangular through holes, which are alternately distributed with the number of flat through holes, and a fixed shaft is rotatably inserted into the inner bottom wall of each of the rectangular through holes. A servo motor with the output end facing upward is fixedly provided in the middle of the bottom surface of the crossbeam, and the motor shaft end of the servo motor is fixedly connected to the bottom end of an adjacent fixed shaft.

[0011] Preferably, both ends of each linkage shaft are rotated to extend into adjacent rectangular through holes, and both ends of each linkage shaft are sleeved with concentrically fixed linkage bevel gears, and the top end of each fixed shaft is sleeved with concentrically fixed fixed bevel gears, and each fixed bevel gear is meshedly connected with a pair of adjacent linkage bevel gears.

[0012] Preferably, the sliding mechanism comprises a linkage chain, a pair of sprocket shafts are rotatably inserted on the outer side of each lifting plate, the outer ends of each pair of sprocket shafts are sleeved with concentrically fixed linkage sprockets, and a linkage chain with synchronous transmission connection is sleeved between each pair of linkage sprockets; A fixed connecting block is fixedly arranged at the bottom of the inner side of each extension plate, and each of the fixed connecting blocks is fixedly connected to the adjacent linkage chain. Two pairs of symmetrically distributed L-shaped connecting blocks are fixedly arranged at the top of the two side surfaces of the side plates, and each of the L-shaped connecting blocks is fixedly connected to the adjacent linkage chain.

[0013] Preferably, two pairs of vertically distributed first rails are fixedly provided on the two side surfaces of the side panels, and a vertically distributed first slide plate is fixedly provided on the inner side surface of each lifting plate, and each of the first slide plates is slidably engaged with the corresponding first rail; The outer side surface of each lifting plate is fixedly provided with a second vertically distributed rail, and the inner side surface of each extension plate is fixedly provided with a second vertically distributed slide plate, and each of the second slide plates is slidably engaged with the corresponding second rail.

[0014] Preferably, a pair of symmetrically distributed rectangular notches are opened on the front and rear side edges of the side panels, a second electric telescopic cylinder with the telescopic end facing upward is fixedly arranged inside each of the rectangular notches, a triangular connecting plate is fixedly arranged at the end of the telescopic rod of each of the second electric telescopic cylinders, each of the triangular connecting plates is located between the top corners of an adjacent pair of lifting plates, and each triangular connecting plate is fixedly connected to the adjacent pair of lifting plates.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the folding mechanism is used in conjunction with each other to ensure that the tunnel surrounding rock reinforcement structure is closely combined with the bottom of the tunnel surrounding rock, thereby improving the overall stability of the tunnel surrounding rock, helping to evenly distribute the stress in the tunnel and reducing potential safety hazards; the design of the load-bearing roller facilitates the movement of the tunnel surrounding rock reinforcement structure, thereby increasing the convenience of use; 2. In the present invention, through the coordinated use of the linkage mechanism, a plurality of arc-shaped support beams are alternately distributed on both sides of the cross beam, and the arc-shaped cross plate and the plurality of arc-shaped support beams can better fit the top wall of the tunnel, thereby providing effective support for the tunnel surrounding rock, helping to maintain the geometric shape of the tunnel surrounding rock, preventing cracks or collapse, and further effectively enhancing the overall stability of the tunnel surrounding rock; 3. In the present invention, the sliding mechanism is used in conjunction to realize the lifting and lowering of the tunnel surrounding rock reinforcement structure in a multi-stage continuous manner, which is convenient for adjusting the height of the tunnel surrounding rock reinforcement structure according to needs. It is suitable for tunnel surrounding rocks of different heights and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the bottom plate and the side plate of the present invention; Figure 3 It is a schematic diagram of the structure of the side plate, the flip plate and the folding plate in the present invention; Figure 4 It is an exploded schematic diagram of the side plate, the flip plate and the folding plate in the present invention; Figure 5 It is a schematic diagram of the structure of the side plate, the lifting plate and the extension plate in the present invention; Figure 6 It is an exploded schematic diagram of the side plate, the lifting plate and the extension plate in the present invention; Figure 7 It is a structural schematic diagram of the cross beam and the arc-shaped cross plate in the present invention; Figure 8 It is a cross-sectional schematic diagram of the cross beam and the arc-shaped cross plate in the present invention; Serial numbers in the figure: 1. bottom plate; 2. side plate; 3. trapezoidal channel steel; 4. flip plate; 5. folding plate; 6. baffle; 7. L-shaped connecting rod; 8. linkage gear; 9. driven connecting rod; 10. driven gear; 11. first electric telescopic cylinder; 12. U-shaped rack; 13. lifting plate; 14. first clamping rail; 15. first slide plate; 16. extension plate; 17. second clamping rail; 18. second slide plate; 19. U-shaped clamping plate; 20. second electric telescopic cylinder; 21. triangular connecting plate; 22. linkage chain; 23. fixed connecting block; 24. L-shaped connecting block; 25. crossbeam; 26. arc cross plate; 27. arc support beam; 28. arc rack; 29. ​​servo motor; 30. fixed bevel gear; 31. linkage bevel gear; 32. fixed gear; 33. first pin; 34. second pin; 35. third pin; 36. fourth pin. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Embodiment 1: This embodiment provides a tunnel surrounding rock reinforcement structure, see Figure 1-8, comprising a bottom plate 1, load-bearing rollers are installed at the four corners of the bottom surface of the bottom plate 1, a vertically distributed side plate 2 is fixedly arranged in the middle of the top surface of the bottom plate 1, a pair of symmetrically distributed trapezoidal channel steels 3 are fixedly arranged on the left and right sides of the side plate 2, each trapezoidal channel steel 3 is provided with a movable hinged flip plate 4 in the middle, each flip plate 4 is provided with a movable hinged folding plate 5 on the outside, each folding plate 5 is fixedly provided with a vertically distributed baffle 6 on the outside edge, and each flip plate 4 is connected to the folding plate 5 on the corresponding side through a folding mechanism; A parallel cross beam 25 is arranged directly above the side plate 2, and an arc-shaped cross plate 26 is fixedly arranged on the top surface of the cross beam 25. A number of equally spaced T-shaped sliding holes are opened on the arc-shaped cross plate 26, and a number of arc-shaped support beams 27 alternately arranged on the left and right are inserted and slidably inserted inside the T-shaped sliding holes, and the cross beam 25 is connected to the number of arc-shaped support beams 27 through a linkage mechanism; the design of the arc-shaped support beam 27 can better adapt to the curved shape of the tunnel, and can bear and transfer loads more effectively than a straight support beam, thereby improving the overall bearing capacity, helping to adapt to changes under different geological conditions, and enhancing the adaptability to different geological conditions; A pair of U-shaped pallets 19 are fixedly provided on the bottom surface of the cross beam 25, and a pair of symmetrically distributed extension plates 16 are fixedly provided on the bottom surface of each U-shaped pallet 19. A vertically sliding lifting plate 13 is provided between each extension plate 16 and the side plate 2, and each lifting plate 13 is connected to the corresponding extension plate 16 through a sliding mechanism.

[0019] Embodiment 2: Based on Embodiment 1, this embodiment also includes the following contents: like Figure 3 and Figure 4 As shown, the folding mechanism includes a linkage gear 8, a first pin shaft 33 is inserted through and fixed to the inner side of the flip plate 4, and both ends of the first pin shaft 33 are rotatably inserted on the trapezoidal channel steel 3, a second pin shaft 34 is inserted through and fixed to the outer side of the flip plate 4, and a third pin shaft 35 is inserted through and fixed to the inner side of the folding plate 5, and both ends of the second pin shaft 34 and the third pin shaft 35 are sleeved with concentrically fixed linkage gears 8, and an adjacent pair of linkage gears 8 are meshed and connected; under the mutual meshing action of the linkage gears 8, the folding plate 5 and the flip plate 4 can be driven to be horizontally unfolded in a "V" shape, and the baffle plate 6 can be driven to press against the bottom of the inner wall of the tunnel, thereby effectively improving the reinforcement effect and helping to enhance the stability of the tunnel; A pair of symmetrically distributed fourth pins 36 are rotatably inserted on the outer side surface of the trapezoidal channel steel 3, and a driven connecting rod 9 is fixedly arranged in the middle of each fourth pin 36, and each driven connecting rod 9 is parallel to the flip plate 4. The outer end of each driven connecting rod 9 is provided with an L-shaped connecting rod 7 that is movably hinged, and the corner of each L-shaped connecting rod 7 is movably hinged to the end corresponding to the second pin 34, and the outer end of each L-shaped connecting rod 7 is movably hinged to the end corresponding to the third pin 35; under the hinged action formed by the driven connecting rod 9 and the L-shaped connecting rod 7, the flip plate 4 can be driven to swing along the first pin 33 in the direction away from the trapezoidal channel steel 3; The outer end of each fourth pin shaft 36 is sleeved with a concentrically fixed driven gear 10, a pair of symmetrically distributed T-shaped through holes are opened on the side plate 2, and a first electric telescopic cylinder 11 with a telescopic end facing upward is fixedly provided at the inner bottom of each T-shaped through hole, and a U-shaped rack 12 with an opening facing downward is fixedly provided at the end of the telescopic rod of each first electric telescopic cylinder 11; the telescopic rod of the first electric telescopic cylinder 11 is extended to drive the U-shaped rack 12 to slide upward along the T-shaped through hole, and both side edges of each U-shaped rack 12 are meshed and connected with an adjacent pair of driven gears 10, and the U-shaped rack 12 is then meshed to drive the driven gear 10, the fourth pin shaft 36, and the driven connecting rod 9 to swing in a direction away from the side plate 2.

[0020] Embodiment 3: Based on Embodiment 2, this embodiment also includes the following contents: like Figure 7 and Figure 8 As shown, the linkage mechanism includes an arc-shaped rack 28 and a fixed gear 32. The inner arc surface of each arc-shaped support beam 27 is fixed with an arc-shaped rack 28. The cross beam 25 is provided with a number of evenly spaced flat through holes, each of which is connected with the adjacent T-shaped sliding hole. A linkage shaft is rotatably inserted inside each flat through hole, and a concentrically fixed fixed gear 32 is sleeved in the middle of each linkage shaft. Each fixed gear 32 is meshed with the adjacent arc-shaped rack 28; the fixed gear 32 can mesh and drive the arc-shaped rack 28 and the arc-shaped support beam 27 to slide along the T-shaped sliding hole; a number of alternately distributed arc-shaped support beams 27 can effectively distribute the load of the top wall of the tunnel to each supporting point evenly, reduce excessive stress on a certain part, and reduce the risk of local instability; The crossbeam 25 is provided with a number of rectangular through holes distributed at equal intervals, and the rectangular through holes and the flat through holes are distributed alternately. A fixed shaft is rotatably inserted into the inner bottom wall of each rectangular through hole. A servo motor 29 with an output end facing upward is fixedly provided in the middle of the bottom surface of the crossbeam 25. The motor shaft end of the servo motor 29 is fixedly connected to the bottom end of the adjacent fixed shaft; the motor shaft of the servo motor 29 can drive the corresponding fixed shaft and the fixed bevel gear 30 to rotate synchronously; Both ends of each linkage shaft rotate and extend into adjacent rectangular through holes, and both ends of each linkage shaft are sleeved with concentrically fixed linkage bevel gears 31, which drive the linkage shaft, the fixed gear 32 and another linkage bevel gear 31 on the same linkage shaft to rotate synchronously, and the top end of each fixed shaft is sleeved with a concentrically fixed fixed bevel gear 30, and each fixed bevel gear 30 is meshed and connected with an adjacent pair of linkage bevel gears 31; the fixed bevel gear 30 can mesh and drive an adjacent pair of linkage bevel gears 31 to rotate forward and reverse.

[0021] Embodiment 4: Based on Embodiment 3, this embodiment also includes the following contents: like Figure 5 and Figure 6 As shown, the sliding mechanism includes a linkage chain 22, a pair of sprocket shafts are rotatably inserted on the outer side of each lifting plate 13, and the outer end of each pair of sprocket shafts is sleeved with a concentrically fixed linkage sprocket, and a linkage chain 22 with synchronous transmission connection is sleeved between each pair of linkage sprockets; the linkage chain 22 and the pair of linkage sprockets will rotate with the lifting and lowering of the lifting plate 13; A fixed connecting block 23 is fixedly arranged at the bottom of the inner side of each extension plate 16, and each fixed connecting block 23 is fixedly connected to the adjacent linkage chain 22. Two pairs of symmetrically distributed L-shaped connecting blocks 24 are fixedly arranged at the top of the two side surfaces of the side plate 2, and each L-shaped connecting block 24 is fixedly connected to the adjacent linkage chain 22. Since the linkage chain 22 is fixed to the side plate 2 through the L-shaped connecting block 24, when the lifting plate 13 is raised, the linkage chain 22 is driven to rotate, and the linkage chain 22 then drives the extension plate 16 to slide upward through the fixed connecting block 23, thus realizing multi-level adjustment of height. Through multi-level adjustment, the arc-shaped cross plate 26 and a plurality of arc-shaped support beams 27 can more accurately adapt to the geometric changes of the tunnel. During the operation of the tunnel, if new surrounding rock deformation or load changes occur, the multi-level adjustment can be flexibly adjusted to meet different support requirements. Two pairs of vertically distributed first rails 14 are fixedly provided on the two side surfaces of the side plate 2, and a vertically distributed first slide plate 15 is fixedly provided on the inner side surface of each lifting plate 13, and each first slide plate 15 is slidably engaged on the corresponding first rail 14; the first slide plate 15 can slide upward along the first rail 14; The outer side of each lifting plate 13 is fixedly provided with a second rail 17 distributed vertically, and the inner side of each extension plate 16 is fixedly provided with a second slide plate 18 distributed vertically, and each second slide plate 18 is slidably engaged with the corresponding second rail 17; the second slide plate 18 can slide upward along the second rail 17; A pair of symmetrically distributed rectangular notches are provided on the front and rear sides of the side panel 2, and a second electric telescopic cylinder 20 with the telescopic end facing upward is fixed inside each rectangular notch, and a triangular connecting plate 21 is fixed at the end of the telescopic rod of each second electric telescopic cylinder 20, and each triangular connecting plate 21 is located between the top corners of an adjacent pair of lifting plates 13, and each triangular connecting plate 21 is fixedly connected to an adjacent pair of lifting plates 13; when the telescopic rod of the second electric telescopic cylinder 20 is extended, the adjacent lifting plates 13 can be driven to slide upward through the triangular connecting plate 21.

[0022] Specifically, the working principle and operation method of the present invention are as follows: Step 1: Push the load-bearing rollers to move the bottom plate 1 to the middle of the tunnel. Under the driving action of a pair of first electric telescopic cylinders 11, the telescopic rod of the first electric telescopic cylinder 11 is extended, and drives the U-shaped rack 12 to slide upward along the T-shaped through hole. The U-shaped rack 12 then engages to drive the driven gear 10, the fourth pin 36, and the driven connecting rod 9 to swing away from the side plate 2. Under the hinged action formed by the driven connecting rod 9 and the L-shaped connecting rod 7, the flip plate 4 is driven to swing along the first pin 33 away from the trapezoidal channel steel 3. Under the mutual meshing action of the linkage gear 8, the folding plate 5 and the flip plate 4 are driven to be horizontally unfolded in a "V" shape, and the baffle 6 is driven to press against the bottom of the inner wall of the tunnel. Step 2: Under the driving action of the servo motor 29, the motor shaft of the servo motor 29 drives the corresponding fixed shaft and the fixed bevel gear 30 to rotate synchronously, the fixed bevel gear 30 meshes to drive the adjacent pair of linkage bevel gears 31 to rotate forward and reversely, the linkage bevel gear 31 drives the linkage shaft, the fixed gear 32 and another linkage bevel gear 31 on the same linkage shaft to rotate synchronously, and the other linkage bevel gear 31 then meshes in turn to drive another fixed bevel gear 30 to rotate, and so on to drive several linkage shafts and fixed gears 32 to rotate, and the fixed gear 32 then meshes to drive the arc rack 28 and the arc support beam 27 to slide along the T-shaped sliding hole, so that the several arc support beams 27 are alternately distributed on both sides of the crossbeam 25; Step three, under the driving action of a pair of second electric telescopic cylinders 20, the telescopic rod of the second electric telescopic cylinder 20 is extended, and the adjacent lifting plate 13 and the first slide plate 15 are driven to slide upward along the first rail 14 through the triangular connecting plate 21. Since the linkage chain 22 is fixed to the side plate 2 through the L-shaped connecting block 24, when the lifting plate 13 is raised, the linkage chain 22 and a pair of linkage sprockets will be driven to rotate. The linkage chain 22 will then drive the extension plate 16 and the second slide plate 18 to further slide upward along the second rail 17 through the fixed connecting block 23, and then drive the cross beam 25, the arc-shaped cross plate 26 and a number of arc-shaped support beams 27 to rise rapidly through the U-shaped card plate 19, and drive the arc-shaped cross plate 26 and a number of arc-shaped support beams 27 to press against the top wall inside the tunnel, thereby forming a reinforcing support effect on the surrounding rock of the tunnel.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tunnel surrounding rock reinforcement structure, characterized in that: The invention comprises a bottom plate (1), wherein four corners of the bottom surface of the bottom plate (1) are provided with load-bearing rollers, a vertically distributed side plate (2) is fixedly provided in the middle of the top surface of the bottom plate (1), a pair of symmetrically distributed trapezoidal channel steels (3) are fixedly provided on the left and right sides of the side plate (2), a movable hinged flip plate (4) is provided in the middle of each of the trapezoidal channel steels (3), a movable hinged folding plate (5) is provided on the outer side of each of the flip plates (4), a vertically distributed baffle plate (6) is fixedly provided on the outer side of each of the folding plates (5), and each of the flip plates (4) is connected to the folding plate (5) on the corresponding side through a folding mechanism; A parallel crossbeam (25) is provided directly above the side plate (2), a curved cross plate (26) is fixedly provided on the top surface of the crossbeam (25), a plurality of equally spaced T-shaped sliding holes are provided on the curved cross plate (26), a plurality of curved support beams (27) alternately distributed on the left and right are slidably inserted inside the plurality of T-shaped sliding holes, and the crossbeam (25) is connected to the plurality of curved support beams (27) via a linkage mechanism; A pair of U-shaped pallets (19) are fixedly provided on the bottom surface of the crossbeam (25), a pair of symmetrically distributed extension plates (16) are fixedly provided on the bottom surface of each of the U-shaped pallets (19), a vertically slidably distributed lifting plate (13) is provided between each of the extension plates (16) and the side plates (2), and each of the lifting plates (13) is connected to the corresponding extension plate (16) via a sliding mechanism.

2. A tunnel surrounding rock reinforcement structure according to claim 1, characterized in that: The folding mechanism comprises a linkage gear (8), a first pin shaft (33) is inserted into the inner side of the flip plate (4) and is fixedly connected thereto, both ends of the first pin shaft (33) are rotatably inserted into the trapezoidal channel steel (3), a second pin shaft (34) is inserted into the outer side of the flip plate (4) and is fixedly connected thereto, a third pin shaft (35) is inserted into the inner side of the folding plate (5) and is fixedly connected thereto, both ends of the second pin shaft (34) and both ends of the third pin shaft (35) are sleeved with concentrically fixed linkage gears (8), and a pair of adjacent linkage gears (8) are meshingly connected.

3. A tunnel surrounding rock reinforcement structure according to claim 2, characterized in that: A pair of symmetrically distributed fourth pins (36) are rotatably inserted on the outer side surface of the trapezoidal channel steel (3), a driven connecting rod (9) is fixedly provided in the middle of each of the fourth pins (36), each of the driven connecting rods (9) is distributed in parallel with the flip plate (4), and an L-shaped connecting rod (7) is movably hinged at the outer end of each of the driven connecting rods (9), and a corner of each of the L-shaped connecting rods (7) is movably hinged to an end corresponding to the second pin (34), and an outer end of each of the L-shaped connecting rods (7) is movably hinged to an end corresponding to the third pin (35).

4. A tunnel surrounding rock reinforcement structure according to claim 3, characterized in that: The outer end of each fourth pin shaft (36) is sleeved with a concentrically fixed driven gear (10), the side plate (2) is provided with a pair of symmetrically distributed T-shaped through holes, the inner bottom of each T-shaped through hole is fixedly provided with a first electric telescopic cylinder (11) with a telescopic end facing upward, the end of the telescopic rod of each first electric telescopic cylinder (11) is fixedly provided with a U-shaped rack (12) with an opening facing downward, and both sides of each U-shaped rack (12) are meshedly connected with the driven gear (10) on the corresponding side.

5. The tunnel surrounding rock reinforcement structure according to claim 1, characterized in that: The linkage mechanism comprises an arc-shaped rack (28) and a fixed gear (32). The inner arc surface of each arc-shaped support beam (27) is fixedly provided with an arc-shaped rack (28). The cross beam (25) is provided with a plurality of flat through holes distributed at equal intervals. Each of the flat through holes is connected to an adjacent T-shaped sliding hole. A linkage shaft is rotatably inserted in the interior of each of the flat through holes. A concentrically fixed fixed gear (32) is sleeved in the middle of each of the linkage shafts. Each of the fixed gears (32) is meshedly connected to an adjacent arc-shaped rack (28).

6. A tunnel surrounding rock reinforcement structure according to claim 5, characterized in that: The crossbeam (25) is provided with a plurality of rectangular through holes which are distributed at equal intervals, the plurality of rectangular through holes and the plurality of flat through holes being distributed alternately, a fixed shaft being rotatably inserted into the inner bottom wall of each of the rectangular through holes, a servo motor (29) with an output end facing upwards being fixedly provided in the middle of the bottom surface of the crossbeam (25), and the motor shaft end of the servo motor (29) being fixedly connected to the bottom end of an adjacent fixed shaft.

7. A tunnel surrounding rock reinforcement structure according to claim 6, characterized in that: Both ends of each linkage shaft are rotatably extended into adjacent rectangular through holes, and both ends of each linkage shaft are sleeved with concentrically fixed linkage bevel gears (31), and the top end of each fixed shaft is sleeved with a concentrically fixed fixed bevel gear (30), and each fixed bevel gear (30) is meshedly connected to a pair of adjacent linkage bevel gears (31).

8. The tunnel surrounding rock reinforcement structure according to claim 1, characterized in that: The sliding mechanism comprises a linkage chain (22), a pair of sprocket shafts are rotatably inserted into the outer side surface of each lifting plate (13), the outer ends of each pair of sprocket shafts are sleeved with concentrically fixed linkage sprockets, and a linkage chain (22) for synchronous transmission connection is sleeved between each pair of linkage sprockets; A fixed connecting block (23) is fixedly provided at the bottom of the inner side of each extension plate (16), and each of the fixed connecting blocks (23) is fixedly connected to an adjacent linkage chain (22). Two pairs of symmetrically distributed L-shaped connecting blocks (24) are fixedly provided at the top of the two side surfaces of the side plate (2), and each of the L-shaped connecting blocks (24) is fixedly connected to an adjacent linkage chain (22).

9. A tunnel surrounding rock reinforcement structure according to claim 8, characterized in that: Two pairs of vertically distributed first rails (14) are fixedly provided on the two side surfaces of the side panels (2), and a vertically distributed first slide plate (15) is fixedly provided on the inner side surface of each lifting plate (13), and each first slide plate (15) is slidably engaged with the corresponding first rail (14); The outer side surface of each lifting plate (13) is fixedly provided with a second vertically distributed rail (17), and the inner side surface of each extension plate (16) is fixedly provided with a second vertically distributed slide plate (18), and each second slide plate (18) is slidably engaged with the corresponding second rail (17).

10. A tunnel surrounding rock reinforcement structure according to claim 9, characterized in that: A pair of symmetrically distributed rectangular notches are provided on the front and rear side edges of the side panels (2); a second electric telescopic cylinder (20) with its telescopic end facing upward is fixedly provided inside each of the rectangular notches; a triangular connecting plate (21) is fixedly provided at the end of the telescopic rod of each of the second electric telescopic cylinders (20); each of the triangular connecting plates (21) is located between the top corners of an adjacent pair of lifting plates (13), and each of the triangular connecting plates (21) is fixedly connected to the adjacent pair of lifting plates (13).

Images