Tunnel secondary lining construction seam circumferential intelligent cutting device and cutting method

Abstract

The invention relates to a tunnel secondary lining construction joint circumferential intelligent cutting device and method. The cutting device comprises a concrete cutting mechanism used for cutting concrete in a construction joint, and a longitudinal displacement adjusting mechanism arranged at the lower end of the concrete cutting mechanism and used for driving the concrete cutting mechanism to move in the radial direction of the construction joint; the lifting mechanism is arranged at the lower end of the longitudinal displacement adjusting mechanism and used for driving the longitudinal displacement adjusting mechanism to ascend and descend, and the transverse sliding mechanism is in loop connection with the lifting mechanism and used for driving the lifting mechanism to move along the construction joint. The movable supporting rack is arranged at the lower end of the transverse sliding mechanism and used for driving the transverse sliding mechanism to move longitudinally, and the transverse sliding mechanism is transversely connected to the movable supporting rack in a sliding mode. Automatic annular cutting of the tunnel second lining construction joint is achieved, the construction efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction equipment, and particularly relates to a circumferential intelligent cutting device and cutting method for the construction joint of the secondary lining of a tunnel. Background Art

[0002] During the construction process of the secondary lining concrete of a tunnel, it is necessary to process the circumferential construction joint formed by the overlap of the previous formwork and the next formwork. Circumferential cutting of the construction joint is an important measure for improving construction quality and safety. Circumferential cutting can release the restraint stress suffered by the secondary lining concrete during longitudinal contraction, thereby preventing or reducing the generation of circumferential cracks. Through circumferential cutting, regular construction joints can be formed, which helps to enhance the overall stability and bearing capacity of the tunnel structure, and has a positive effect on improving the seismic resistance, impermeability and other properties of the tunnel.

[0003] Circumferential cutting requires precise measurement and positioning to ensure the accuracy and consistency of the cutting position, which increases the difficulty and complexity of construction and requires high professional skills and experience of construction personnel.

[0004] Traditional circumferential cutting is carried out by construction personnel standing on a bracket using a grinding wheel, which is not only time-consuming and laborious. At the same time, during the circumferential cutting process, safety hazards such as sparks and flying objects may be generated. If safety measures are not in place, it may pose a threat to the personal safety of construction personnel. Therefore, it is particularly important to develop a device that can automatically and efficiently complete the circumferential cutting task. Summary of the Invention

[0005] Aiming at the above problems, the purpose of the present invention is to provide a circumferential intelligent cutting device and cutting method for the construction joint of the secondary lining of a tunnel, and solve the above problems existing in the prior art through an automatic cutting device, so as to achieve precise positioning and efficient cutting of the circumferential construction joint.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present invention is as follows:

[0007] A circumferential intelligent cutting device for the construction joint of the secondary lining of a tunnel, comprising:

[0008] A concrete cutting mechanism for cutting the concrete in the construction joint;

[0009] A longitudinal displacement adjusting mechanism is arranged at the lower end of the concrete cutting mechanism, used for supporting the concrete cutting mechanism and driving the concrete cutting mechanism to move radially along the construction joint;

[0010] A lifting mechanism is arranged at the lower end of the longitudinal displacement adjusting mechanism, used for supporting the longitudinal displacement adjusting mechanism and driving the longitudinal displacement adjusting mechanism to perform lifting movement;

[0011] A horizontal sliding mechanism, with a collar connecting to the lifting mechanism, is used to drive the lifting mechanism to move axially along the construction joint;

[0012] A moving support platform is arranged at the lower end of the horizontal sliding mechanism, used to support the horizontal sliding mechanism and drive the horizontal sliding mechanism to move longitudinally. The horizontal sliding mechanism is horizontally slidably connected to the moving support platform.

[0013] Furthermore, the moving support platform includes a platform, an arched frame, a rotating cylinder, a positioning component and a driving wheel set. The rotating cylinder is slidably nested on the platform. The arched frame is sleeved around the outer periphery of the platform in a ring shape and is connected to the rotating cylinder. The positioning component is arranged on the outer peripheral surface of the platform and on both sides of the arched frame to position the arched frame on the outer periphery of the platform. The driving wheel set is distributed around the bottom of the platform. The horizontal sliding mechanism is arranged on the arched frame.

[0014] Furthermore, the positioning component includes an adjusting screw rod and a fixed wire plate. The fixed wire plates are arranged in a circular array on the outer periphery of the platform in the radial direction. The adjusting screw rod is screwed on the fixed wire plate to stop the arched frame.

[0015] Furthermore, the horizontal sliding mechanism includes a circumferential track, a π-shaped bracket, a driving motor, a sprocket, a chain and a grooved wheel. A pair of circumferential tracks are arranged on the arched frame at intervals. The π-shaped bracket is slidably connected to the pair of circumferential tracks through the grooved wheel. A chain is laid on at least one circumferential track. The sprocket is slidably connected to the π-shaped bracket and meshes with the chain. The driving motor is arranged on the π-shaped bracket and is connected to the sprocket to drive the sprocket to move along the chain.

[0016] Furthermore, the π-shaped bracket includes a grooved wheel frame and a moving frame. The lower end of the moving frame is provided with grooved wheel frames at intervals. A pair of grooved wheel frames are located within the interval of the pair of annular tracks. The grooved wheel is axially slidably connected within the grooved wheel frame, and the radial part of the grooved wheel is slidably embedded inside the annular track. A driving shaft is arranged on one side of the moving frame. The sprocket is slidably sleeved on the driving shaft. A bracket driven gear is slidably sleeved at the end of the driving shaft. A bracket driving gear that meshes with the bracket driven gear is sleeved at the output end of the driving motor.

[0017] Furthermore, the longitudinal displacement adjusting mechanism includes a fixing plate, a linear displacement component, a fine-tuning motor, a fine-tuning screw rod and a nut. The fixing plate is arranged on the lifting mechanism. At least a pair of linear displacement components are arranged on the fixing plate at intervals. The concrete cutting mechanism is arranged on the linear displacement component. The fine-tuning motor and the nut are arranged at intervals at the lower end of the concrete cutting mechanism and on one side of the linear displacement component. The fine-tuning motor is connected to one end of the fine-tuning screw rod, and the other end of the fine-tuning screw rod is screwed to the nut.

[0018] Further, the concrete cutting mechanism includes a sliding plate, a positioning plate, a cutting machine, an electric telescopic component, an adjusting wire tube, and a sliding component. The sliding plate is arranged on the longitudinal displacement adjusting mechanism. A pair of the positioning plates are arranged at intervals and one ends of both are inclined and hinged on the sliding plate. One end of the adjusting wire tube is hinged on the lower plate surface of the positioning plate, and the other end is hinged on the sliding plate for adjusting the included angle between the positioning plate and the sliding plate. The cutting machine is slidably connected to the upper plate surface of the positioning plate through the sliding component. An electric telescopic component is arranged on the lower plate surface of the positioning plate, and one end of the electric telescopic component is hinged to the sliding component for driving the cutting machine to telescopically move along the positioning plate.

[0019] Further, the lifting mechanism includes a lifting component, a rotating disc, and a limiting column. One end of the lifting component is nested in the transverse sliding mechanism, and the other end is provided with the rotating disc. The longitudinal displacement adjusting mechanism is arranged on the rotating disc. A pair of the limiting columns are located on the outer periphery of the lifting component, and the upper ends of both are connected to the rotating disc, and the lower ends are slidably embedded in the transverse sliding mechanism.

[0020] Further, it further includes a limiting mechanism, a guiding mechanism, and a dust suction mechanism. The limiting mechanism is arranged on the concrete cutting mechanism for limiting the distance between the concrete cutting mechanism and the surface of the tunnel secondary lining concrete. The guiding mechanism is respectively arranged on the concrete cutting mechanism and the surface of the tunnel secondary lining concrete for guiding the concrete cutting mechanism to axially move along the construction joint. The dust suction mechanism is arranged on the concrete cutting mechanism for adsorbing the dust after the construction joint is cut.

[0021] The present invention also provides a cutting method using the above-mentioned circumferential intelligent cutting device for the tunnel secondary lining construction joint, including the following steps:

[0022] Step 1: Move the device to the position of the construction joint and clean the concrete on both sides of the construction joint.

[0023] Step 2: Adjust the moving support bench and the lifting mechanism so that the concrete cutting mechanism is vertically aligned with the construction joint and is located at one end of the construction joint.

[0024] Step 3: Start the lifting mechanism to gradually rise. First, drive the concrete cutting mechanism to obliquely cut into the tunnel secondary lining concrete through the simultaneous movement of the longitudinal displacement adjusting mechanism and the transverse sliding mechanism until the radial cutting position of the construction joint is reached.

[0025] Step 4: Drive the concrete cutting mechanism to axially move along the construction joint through the transverse sliding mechanism and cut to the other end of the construction joint.

[0026] Due to the above technical solutions adopted by the present invention, it has the following advantages and effects:

[0027] An intelligent circumferential cutting device and cutting method for the construction joint of the secondary lining of a tunnel according to the present invention realize the automatic circumferential cutting of the construction joint of the secondary lining of the tunnel by setting a concrete cutting mechanism, a longitudinal displacement adjusting mechanism, a lifting mechanism, a transverse sliding mechanism, a mobile support frame and a limiting mechanism, etc. This greatly improves the construction efficiency, reduces manual operation, and lowers the labor intensity. Moreover, according to the different tunnel design curves, the present invention can adjust the mobile support frame and the lifting mechanism, so that the concrete cutting mechanism can be applicable to the cutting construction of the construction joints of different tunnel designs, and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the intelligent circumferential cutting device for the construction joint of the secondary lining of the tunnel according to the present invention.

[0029] Figure 2 is Figure 1 side view of

[0030] The reference numerals are as follows:

[0031] 1 - Frame, 2 - Arch frame, 3 - Rotating cylinder, 4 - Driving bracket, 5 - Driving wheel, 6 - Reducer, 7 - Adjusting screw rod, 8 - Fixed wire plate, 9 - Circumferential track, 10 - π-shaped bracket, 11 - Grooved wheel, 12 - Chain, 13 - Sprocket, 14 - Lifting assembly, 15 - Driving motor, 16 - Bracket driven gear, 17 - Bracket driving gear, 18 - Fixed plate, 19 - Linear displacement assembly, 20 - Fine adjustment motor, 21 - Sliding plate, 22 - Positioning plate, 23 - Electric telescopic assembly, 24 - Sliding assembly, 25 - Adjusting wire tube, 26 - Cutting machine, 27 - Rotating disc, 28 - Limiting column, 29 - Limiting screw rod, 30 - Limiting sensor, 31 - Guiding probe, 32 - Guiding plate, 33 - Construction joint, 34 - Tunnel secondary lining concrete, 35 - Cutting knife, 36 - Protective cover, 37 - Filter screen, 38 - Vacuum cleaner, 39 - Leakage trough, 40 - Dust removal bag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will describe the embodiments of the present invention in detail with reference to the drawings, so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present invention, but only to illustrate the essential spirit of the technical solution of the present invention.

[0033] Such as Figure 1 、 Figure 2As shown in the figure. An intelligent circumferential cutting device for the construction joint of the second lining of a tunnel according to the present invention includes a concrete cutting mechanism, a longitudinal displacement adjusting mechanism, a lifting mechanism, a transverse sliding mechanism, a moving support platform, a limiting mechanism, a guiding mechanism, and a dust suction mechanism. The concrete cutting mechanism is used to cut the concrete in the construction joint 33. The longitudinal displacement adjusting mechanism is arranged at the lower end of the concrete cutting mechanism to support the concrete cutting mechanism and drive the concrete cutting mechanism to move radially along the construction joint 33. The lifting mechanism is arranged at the lower end of the longitudinal displacement adjusting mechanism to support the longitudinal displacement adjusting mechanism and drive the longitudinal displacement adjusting mechanism to move. The transverse sliding mechanism is sleeved and connected to the outer circumference of the lifting mechanism in the radial direction to drive the lifting mechanism to move along the arc of the construction joint. The moving support platform is arranged at the lower end of the transverse sliding mechanism to support the transverse sliding mechanism and drive the transverse sliding mechanism to move longitudinally. The transverse sliding mechanism is slidably connected to the moving support platform. The limiting mechanism is arranged on the concrete cutting mechanism to adjust the telescopic movement of the lifting mechanism, so that the concrete cutting mechanism maintains a certain distance interval from the surface of the tunnel second lining concrete to control the consistent cutting depth of the construction joint. The guiding mechanism is respectively arranged on the concrete cutting mechanism and the surface of the tunnel second lining concrete to guide the concrete cutting mechanism to move axially along the construction joint 33. The guiding mechanism controls the displacement of the longitudinal displacement adjusting mechanism, so that the concrete cutting mechanism moves axially along the construction joint for cutting. The dust suction mechanism is arranged on the lateral side edge of the concrete cutting mechanism to adsorb the dust after the construction joint is cut.

[0034] Furthermore, the moving support platform includes a platform 1, an arch frame 2, a rotating cylinder 3, a positioning component, and a driving wheel set. The rotating cylinder 3 is slidably nested on the platform 1. The arch frame 2 is sleeved on the outer circumference of the platform 3 in the radial direction and is connected to the rotating cylinder 3. The positioning component is arranged on the outer peripheral surface of the platform and on both sides of the arch frame 2 to position the arch frame 2 on the outer circumference of the platform 1. The driving wheel set is distributed around the bottom of the platform 1. The transverse sliding mechanism is slidably connected to the arch frame 2.

[0035] Specifically, the upper outer circumference of the platform 1 is a semi-circular frame structure, and there are support legs around the bottom. The driving wheel set is arranged on the support legs. Each driving wheel set includes a driving support 4 and a driving wheel 5. The upper end of the driving support 4 is slidably connected to the lower end of the support leg. The driving wheel 1 is slidably nested in the driving support 4 through a wheel shaft. A speed reducer 6 is arranged on the outer side of the driving support 4. A wheel set driving gear is sleeved on the output end of the speed reducer 6. A wheel set transmission gear is sleeved on one end of the wheel shaft. The wheel set driving gear and the wheel set transmission gear are meshed. The speed reducer 6 drives the driving wheel 5 to rotate through the meshing transmission of the wheel set driving gear and the wheel set transmission gear.

[0036] The arch frame 2 is a semi-circular ring-shaped support, which has two inner and outer layers. Each layer is composed of annular frames arranged at intervals in the front and back. The annular frames of the inner and outer layers are concentric and connected by cross beams. A pair of annular frames spaced apart in the front and back at the bottom layer are connected by a bottom beam, so that the cross section of the arch frame 2 is a U-shaped structure.

[0037] The bottom of the rotating cylinder 3 is fixed on the platform frame 1. The upper end of the rotating cylinder 3 is slidably nested in the radial center of a pair of annular frames of the arch frame 2 through a bearing, so that the arch frame 2 can axially rotate through the rotating cylinder 3 to adjust the angle between the arch frame 2 and the platform frame 1 axially.

[0038] Furthermore, the positioning assembly includes an adjusting screw rod 7 and a fixed wire plate 8. The fixed wire plates 8 are arranged in an annular array on the outer periphery of the platform frame 1 in the radial direction. The adjusting screw rod 7 is screwed on the fixed wire plate 8 for stopping the arch frame 2.

[0039] Specifically, axial connecting bars are distributed and arranged on the outer periphery of the platform frame 1 in the radial direction. The arch frame 2 is sleeved on the outer periphery of the connecting bars. The two ends of the connecting bars extend out of the front and back ends of the arch frame 2. Fixed wire plates 8 are arranged at both ends of the connecting bars. The fixed wire plates 8 are perpendicularly connected to the connecting bars. Screw holes are provided on the fixed wire plates 8. The adjusting screw rod 7 is threadedly connected in the screw holes. The adjusting screw rods at both ends of the connecting bars are arranged oppositely. The adjusting screw rods are respectively spaced oppositely from both ends of the bottom beam at the bottom of the arch frame 2. After adjusting the angle of the arch frame 2 through the rotating cylinder 3, the arch frame 2 is positioned and fixed by stopping the adjusting screw rod 7 distributed at the front and back ends of the arch frame 2 on the bottom beam.

[0040] Furthermore, the transverse sliding mechanism includes a circumferential track 9, a π-shaped bracket 10, a driving motor 15, a sprocket 13, a chain 12 and a grooved wheel 11. A pair of circumferential tracks 9 are arranged at intervals on the arch frame 2. The π-shaped bracket 10 is slidably connected to a pair of circumferential tracks 9 through the grooved wheel 11. The chain 12 is laid on at least one circumferential track 9. The sprocket 13 is slidably connected to the π-shaped bracket 10 and meshes with the chain 12. The driving motor 15 is arranged on the π-shaped bracket 10 and connected to the sprocket 13 for driving the sprocket 13 to move along the chain 12.

[0041] Specifically, the circumferential track 9 is a semi-circular track matching the outer periphery of the arch frame 2. The outer peripheries of a pair of annular frames of the outermost layer of the arch frame 2 are both provided with the circumferential track 9. The grooved wheel 11 is slidably nested on each circumferential track 9. The axial cross section of the grooved wheel 11 is an I-shaped structure. The inner sides of a pair of circumferential tracks 9 are embedded in the outer periphery of the radial direction of the grooved wheel 11. The chain 12 is laid on the outer periphery of the circumferential track 9 and is spaced oppositely from the grooved wheel 11. Each chain 12 meshes with a pair of sprockets 13. A pair of sprockets 13 are respectively located on both sides of the π-shaped bracket 10. Driving motors 15 are arranged on both sides of the π-shaped bracket 10. The driving motor 15 on each side is drivingly connected to the sprocket 13 on the corresponding side.

[0042] Furthermore, the π-shaped bracket 10 includes a sheave bracket and a moving bracket. The lower end of the moving bracket is provided with the sheave brackets at intervals. A pair of sheave brackets are located within the interval between a pair of annular tracks 9. The axial direction of the sheave 11 is slidably connected within the sheave bracket, and the radial direction of the sheave 11 is slidably embedded inside the annular track 9. At least one side of the moving bracket is provided with a drive shaft. The sprocket 13 is slidably sleeved on the drive shaft. The end of the drive shaft is slidably sleeved with a bracket driven gear 16. The output end of the drive motor 15 is sleeved with a bracket drive gear 17 that meshes with the bracket driven gear 16.

[0043] Specifically, the moving bracket is a plate-like structure, and the sheave bracket is a C-shaped structure. The sheave 11 is axially arranged within the sheave bracket. The upper and lower ends of the sheave 11 are slidably connected within the sheave bracket through a wheel shaft. Stopping wheels are arranged at the lower parts of both ends of the moving bracket. The outer periphery of the radial direction of the stopping wheel stops against the outside of the annular track 9. The moving bracket is slidably nested and connected to the annular track 9 through the sheave 11 and the stopping wheels. Drive shafts are arranged on both the transverse sides of the moving bracket 10. Sprockets 13 are sleeved at both ends of the drive shaft and mesh with the chain 12. A drive motor 15 is arranged on the moving bracket 10 on one side of each drive shaft to drive the drive shaft to drive the sprocket 13 to rotate.

[0044] Furthermore, the longitudinal displacement adjustment mechanism includes a fixing plate 18, a linear displacement assembly 19, a fine-tuning motor 20, a fine-tuning lead screw and a nut. The fixing plate 18 is arranged on the lifting mechanism. At least a pair of linear displacement assemblies 19 are arranged on the fixing plate 18 at intervals. The concrete cutting mechanism is arranged on the linear displacement assembly 19. The fine-tuning motor 20 and the nut are arranged at intervals at the lower end of the concrete cutting mechanism and on one side of the linear displacement assembly. The output end of the fine-tuning motor 20 is connected to one end of the fine-tuning lead screw, and the other end of the fine-tuning lead screw is screwed to the nut.

[0045] Specifically, the linear displacement assembly 19 includes a translation slide rail and a translation slide sleeve. A pair of translation slide rails are arranged on the fixing plate 18 at a transverse interval. A translation slide sleeve is slidably nested on each translation slide rail. The concrete cutting mechanism is arranged on a pair of translation slide sleeves. The fine-tuning motor 20, the fine-tuning lead screw and the nut form a lead screw-nut mechanism. The fine-tuning motor 20 drives the fine-tuning lead screw to rotate, so as to realize the axial movement adjustment of the concrete cutting mechanism along the pair of translation slide rails 18.

[0046] Further, the concrete cutting mechanism includes a sliding plate 21, a positioning plate 22, an electric telescopic assembly 23, a cutting machine 26, an adjusting screw tube 25, and a sliding assembly 24. The sliding plate 21 is arranged on the longitudinal displacement adjusting mechanism. A pair of positioning plates 22 are arranged at intervals, and one ends of both are inclined and hinged on the sliding plate 21. One end of the adjusting screw tube 25 is hinged on the lower plate surface of the positioning plate 22, and the other end is hinged on the sliding plate 21 for adjusting the included angle between the positioning plate 22 and the sliding plate 21. The cutting machine 26 is slidably connected to the upper plate surface of the positioning plate 22 through the sliding assembly 24. An electric telescopic assembly 23 is arranged on the lower plate surface of the positioning plate 22, and one end of the electric telescopic assembly 23 is hinged to the sliding assembly 24 for driving the cutting machine 26 to telescopically move along the positioning plate 22.

[0047] Specifically, the sliding plate 21 is arranged on a pair of translation sliding sleeves 17. The screw-nut mechanism is arranged on one side of the lower end of the sliding plate 21. The positioning plates 22 are longitudinally arranged at intervals before and after on the sliding plate 21. A pair of positioning plates 22 are opposite to each other in the transverse direction of the sliding plate 21. The bottom of the positioning plate 22 is hinged to the sliding plate 21. The transverse projections of the pair of positioning plates 22 are in a "Λ" shape. The upper plate surface of the positioning plate 22 is connected to the sliding plate 21 through the sliding assembly 24. The cutting machine 26 is fixed on the upper plate surface of the sliding plate 21. The cutting blades 35 at the upper end of the cutting machine 26 extend out of the sliding plate 21. The transverse projections of the pair of cutting blades 35 are in a "Λ" shape.

[0048] The adjusting screw tube 25 includes an outer tube and an inner rod. One end of the inner rod is hinged to the lower plate surface of the positioning plate 22. One end of the outer tube is hinged to the sliding plate 21. The other end of the inner rod is embedded in the outer tube and can axially slide in the outer tube. A plurality of threaded holes are provided on the outer tube, and bolts corresponding to the threaded holes are provided on the inner rod. By tightening the bolts, the inner rod can be fixed at a specified position in the outer tube, so as to adjust the included angle between the positioning plate 22 and the sliding plate 21, and realize the adjustment of the angles and gaps of the cutting blades 35 on the pair of cutting machines 26.

[0049] The sliding assembly 24 includes a linear slide rail and a linear slider. The cutting machine 26 is fixed on the linear slider. The linear slide rail is arranged on the upper plate surface of the positioning plate 22. A slot is provided on the positioning plate 22. The fixed end of the electric telescopic assembly 23 is arranged at the lower part of the lower plate surface of the positioning plate 22, and the telescopic end extends to the upper part of the lower plate surface of the positioning plate 22 and is hinged to the linear slider through the slot. The telescopic movement of the electric telescopic assembly 23 drives the linear slider to move along the linear slide rail, realizing the telescopic movement adjustment of the cutting machine 26. The electric telescopic assembly 23 is an electric telescopic push rod.

[0050] Furthermore, the lifting mechanism includes a lifting component 14, a rotating disk 27, and a limiting column 28. The fixed end of the lifting component 14 is nested in the lateral sliding mechanism, the telescopic end of the lifting component 14 is provided with the rotating disk 27, the longitudinal displacement adjusting mechanism is arranged on the rotating disk 27, and a pair of limiting columns 28 are located on the outer periphery of the lifting component 14, with the upper ends connected to the rotating disk 27 and the lower ends slidably nested on the lateral sliding mechanism.

[0051] Specifically, the lifting component 14 is a lifting cylinder, the fixed end of the lifting cylinder is nested in the π-shaped bracket 10, and the limiting column 28 is slidably nested in the π-shaped bracket 10. The rotating disk 27 includes an annular rolling groove, rollers, and an annular sliding cover. The annular sliding cover and the annular rolling groove are arranged up and down, and a plurality of rollers are slidably nested between them. The rollers are nested in a pair of annular rolling grooves and can move radially in a circular motion. The fixing plate 18 of the longitudinal displacement adjusting mechanism is arranged on the annular sliding cover. When a pair of limiting columns 28 are removed, the annular sliding cover rotates to achieve the rotation of the longitudinal displacement adjusting mechanism. When a pair of limiting columns are installed, when the lifting cylinder drives the longitudinal displacement adjusting mechanism to move up and down, a pair of limiting columns 28 move up and down along the π-shaped bracket 10. At the same time, a hydraulic tank is arranged on the moving support frame to provide hydraulic power for the lifting cylinder.

[0052] Furthermore, the limiting mechanism is arranged at the longitudinal end of the sliding plate 21 and located at the horizontal center of a pair of positioning plates 22, the guiding mechanisms are respectively arranged at the horizontal ends of the sliding plate 21 and located at the longitudinal center of a pair of positioning plates 22 and on the surface of the secondary lining concrete 34 of the tunnel, and the dust suction mechanism is arranged at the longitudinal other end of the upper sliding plate 21 opposite to the limiting mechanism at an interval.

[0053] Specifically, the limiting mechanism includes a limiting screw rod 29 and a limiting sensor 30. The bottom of the limiting screw rod 29 is fixed on the sliding plate 21, the top of the limiting screw rod 29 is screwed with a support plate, and the limiting sensor 30 is arranged on the support plate. The limiting sensor 30 can axially adjust and move on the limiting screw rod 29. During the cutting process of the construction joint 33, after detecting the distance from the surface of the secondary lining concrete 34 of the tunnel through the limiting sensor 30, a control signal is sent to the lifting component 14, and the concrete cutting mechanism is adjusted by the lifting component 14 to walk along the construction joint 33 according to the height of the surface of the secondary lining concrete 34 of the tunnel.

[0054] The guiding mechanism includes a guiding lead screw, a guiding probe 31, and a guiding plate 32. The bottom of the guiding lead screw is fixed on the sliding plate 21, and the top of the guiding lead screw is screwed with the guiding probe 31. The guiding probe 31 can be axially adjusted up and down on the guiding lead screw. The guiding plate 32 is pasted on the surface of the tunnel secondary lining concrete 34 in the axial advancing direction of the construction joint 33, facing the guiding probe 31 at an interval. During the cutting process of the construction joint 33, after detecting the distance between the guiding probe 31 and the guiding plate 32, a control signal is output to the fine-tuning motor 20, and the fine-tuning motor 20 controls the longitudinal moving distance of the concrete cutting mechanism, so that the cutting machine 26 of the concrete cutting mechanism performs a circumferential cutting operation along the axis of the construction joint 33, and the cross-section of the construction joint 33 is cut into a "Λ"-shaped opening.

[0055] The dust collection mechanism includes a vacuum cleaner 38, a leakage trough 39, a protective cover 36, a dust collection bag 40, and a filter screen 37. One end of the leakage trough 39 is hinged at the end of the sliding plate 21 and extends downward. A horn-shaped protective cover 36 is provided at the upper end of the leakage trough 39. The filter screen 37 is installed inside the protective cover 36. One end of the protective cover 36 is provided with the vacuum cleaner 38, and the dust collection bag 40 is connected to the vacuum cleaner 38. Part of the dust generated by cutting is adsorbed into the dust collection bag 40 through the vacuum cleaner 38, and part of it is deposited in the leakage trough 39.

[0056] Furthermore, in order to control the entire device, a controller is installed on the mobile support frame. The controller is electrically connected to electric components such as the reduction gear 6, the lifting assembly 14, the driving motor 15, the fine-tuning motor 20, the electric telescopic assembly 23, the hydraulic tank, and the vacuum cleaner 38. The controller can control the actions of each component through a wireless remote controller.

[0057] A circumferential intelligent cutting method for a tunnel secondary lining construction joint of the present invention uses the circumferential intelligent cutting device for a tunnel secondary lining construction joint of the present invention. The cutting method includes the following steps:

[0058] Step 1, preparation stage: Move the cutting device to the position of the construction joint 33 of the tunnel secondary lining concrete 34, and clean the concrete on both sides of the construction joint 33 to expose a clear construction gap.

[0059] Specifically, the cutting device is moved to the starting position at one end edge of the construction joint 33 through the driving wheel set of the mobile support frame. When cleaning the construction joint 33, the concrete on both sides of the construction joint of the previous form of the tunnel secondary lining concrete 34 is knocked off to expose a clear construction gap. After cleaning, the guiding plate 32 is circumferentially pasted on the surface of the tunnel secondary lining concrete 34 on one side of the construction joint.

[0060] Step 2, positioning and adjustment: According to the different tunnel design curves, adjust the mobile support frame and the lifting mechanism so that the concrete cutting mechanism is vertically aligned with the construction joint 33 and is located at one longitudinal end of the construction joint 33;

[0061] Specifically, after adjusting the angle of the arch frame 2 by rotating the cylinder 3, the adjusting screw rods 7 at both ends of the arch frame 2 are locked to fix the arch frame 2. The lifting component 14 of the lifting mechanism is started to rise until it stops at a distance of 4-5 cm from the surface 34 of the secondary lining concrete of the tunnel. The extending length, cutting angle, and cutting width of the cutting blades 35 of the two cutting machines 26 are adjusted through the adjusting screw tube 25 and the electric telescopic component 23. Finally, the longitudinal projection formed by a pair of cutting blades 35 is in the shape of a "Λ", and the vertex of the "Λ" shape is located at the center of the construction joint 33.

[0062] Step 3, oblique cutting: Start the lifting mechanism to gradually rise. First, drive the concrete cutting mechanism to obliquely cut into the secondary lining concrete 34 of the tunnel through the simultaneous movement of the longitudinal displacement adjusting mechanism and the transverse sliding mechanism until it reaches the radial cutting position of the construction joint 33.

[0063] Specifically, the longitudinal displacement adjusting mechanism is realized by driving the fine-tuning screw rod with a fine-tuning motor 20 to push the sliding plate 21. The transverse sliding mechanism drives the π-shaped support 10 to move along the arch frame 2 through the driving motor 15. The two work synchronously to obliquely cut the cutting blade 35 of the cutting machine 26 into the secondary lining concrete of the tunnel to reach the set position. Then, start the guiding probe 31 to control the fine-tuning motor 20, and start the limit sensor 30 to control the lifting mechanism.

[0064] Step 4, axial cutting: Drive the concrete cutting mechanism to move axially along the construction joint through the transverse sliding mechanism to cut to the other end of the construction joint.

[0065] Specifically, the driving motor 15 drives the concrete cutting mechanism to move and cut along the arch frame 2. During the moving and cutting process of the concrete cutting mechanism, the lifting of the lifting component 14 of the lifting mechanism is controlled by the control signal provided by the limit sensor 30. The fine-tuning motor 20 of the longitudinal displacement adjusting mechanism is controlled by the control signal provided by the guiding probe 31. The longitudinal displacement adjusting mechanism is driven by the fine-tuning motor 20 to move. The guiding probe 31 advances along the guiding plate 32 with the guiding plate 32 as the base point to provide signals for the fine-tuning motor 20, so that the cutting blade 35 of the cutting machine 26 performs circumferential cutting operations along the construction joint 33. During the cutting process, the dust generated during cutting is adsorbed by the vacuum cleaner 38 of the dust collection mechanism.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An intelligent circumferential cutting device for the construction joint of the secondary lining of a tunnel, characterized in that Comprising: A concrete cutting mechanism for cutting the concrete within the construction joint (33); A longitudinal displacement adjusting mechanism provided at the lower end of the concrete cutting mechanism for supporting the concrete cutting mechanism and driving the concrete cutting mechanism to move radially along the construction joint (33); A lifting mechanism provided at the lower end of the longitudinal displacement adjusting mechanism for supporting the longitudinal displacement adjusting mechanism and driving the longitudinal displacement adjusting mechanism to perform lifting movement; A transverse sliding mechanism sleeved around and connected to the lifting mechanism for driving the lifting mechanism to move axially along the construction joint (33); A moving support platform provided at the lower end of the transverse sliding mechanism for supporting the transverse sliding mechanism and driving the transverse sliding mechanism to move longitudinally, and the transverse sliding mechanism is transversely slidably connected to the moving support platform.

2. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 1, characterized in that The moving support platform includes a platform frame (1), an arch frame (2), a rotating cylinder (3), a positioning assembly, and a driving wheel set. The rotating cylinder (3) is slidably nested on the platform frame (1). The arch frame (2) is sleeved around the outer circumference of the platform frame (1) in the radial direction and is connected to the rotating cylinder (3). The positioning assembly is provided on the outer peripheral surface of the platform frame (1) and on both sides of the arch frame (2) for positioning the arch frame (2) on the outer periphery of the platform frame (1). The driving wheel set is distributed around the bottom of the platform frame (1), and the transverse sliding mechanism is provided on the arch frame (2).

3. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 2, wherein, The positioning assembly includes an adjusting screw rod (7) and a fixed wire plate (8). The fixed wire plate (8) is arranged in a circular array on the outer circumference of the platform frame (1) in the radial direction. The adjusting screw rod (7) is screwed on the fixed wire plate (8) for blocking the arch frame (2).

4. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 1 or 2, characterized in that, The transverse sliding mechanism includes a circumferential track (9), a π-shaped bracket (10), a driving motor (15), a sprocket (13), a chain (12), and a grooved wheel (11). A pair of the circumferential tracks (9) are arranged at intervals on the arch frame (2). The π-shaped bracket (10) is slidably connected to a pair of circumferential tracks (9) through the grooved wheel (11). A chain (12) is laid on at least one circumferential track (9). The sprocket (13) is slidably connected to the π-shaped bracket (10) and meshes with the chain (12). The driving motor (15) is provided on the π-shaped bracket (10) and is connected to the sprocket (13) for driving the sprocket (13) to move along the chain (12).

5. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 4, characterized in that, The π-shaped bracket (10) includes a grooved wheel frame and a moving frame. The lower end of the moving frame is provided with the grooved wheel frame at intervals. A pair of the grooved wheel frames are located within the interval of a pair of circumferential tracks (9). The grooved wheel (11) is axially slidably connected within the grooved wheel frame, and the radial direction of the grooved wheel (11) is slidably embedded inside the circumferential track (9). One side of the moving frame is provided with a driving shaft. The sprocket (13) is slidably sleeved on the driving shaft. The end of the driving shaft is slidably sleeved with a bracket driven gear (16). The output end of the driving motor (15) is sleeved with a bracket driving gear (17) that meshes with the bracket driven gear (16).

6. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 4, characterized in that, The longitudinal displacement adjusting mechanism includes a fixed plate (18), a linear displacement assembly (19), a fine-tuning motor (20), a fine-tuning lead screw and a nut. The fixed plate (18) is arranged on the lifting mechanism. At least one pair of the linear displacement assemblies are arranged on the fixed plate (18) at intervals. The concrete cutting mechanism is arranged on the linear displacement assembly. The fine-tuning motor (20) and the nut are arranged at intervals at the lower end of the concrete cutting mechanism and on one side of the linear displacement assembly. The fine-tuning motor (20) is connected to one end of the fine-tuning lead screw, and the other end of the fine-tuning lead screw is screwed to the nut.

7. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 5, wherein, The concrete cutting mechanism includes a sliding plate (21), a positioning plate (22), an electric telescopic assembly (23), a cutting machine (26), an adjusting wire tube (25) and a sliding assembly (24). The sliding plate (21) is arranged on the longitudinal displacement adjusting mechanism. A pair of the positioning plates (22) are arranged at intervals and one ends of both are inclined and hinged to the sliding plate (21). One end of the adjusting wire tube (25) is hinged to the lower plate surface of the positioning plate (22), and the other end is hinged to the sliding plate (21) for adjusting the included angle between the positioning plate (22) and the sliding plate (21). The cutting machine (26) is slidably connected to the upper plate surface of the positioning plate (22) through the sliding assembly (24). The electric telescopic assembly (23) is arranged on the lower plate surface of the positioning plate (22), and one end of the electric telescopic assembly (23) is hinged to the sliding assembly (24) for driving the cutting machine (26) to move axially along the positioning plate (22).

8. The circumferential intelligent cutting device for the construction joint of the secondary lining of the tunnel according to claim 7, characterized in that, The lifting mechanism includes a lifting assembly (14), a rotating disc (27) and a limiting column (28). One end of the lifting assembly (14) is nested in the transverse sliding mechanism, and the other end is provided with the rotating disc (27). The longitudinal displacement adjusting mechanism is arranged on the rotating disc (27). A pair of the limiting columns (28) are located on the outer periphery of the lifting assembly (14), and the upper ends of both are connected to the rotating disc (27), and the lower ends are slidably embedded in the transverse sliding mechanism.

9. The circumferential intelligent cutting device for the construction joint of the secondary lining of a tunnel according to claim 1, characterized in that, It further includes a limiting mechanism, a guiding mechanism and a dust suction mechanism. The limiting mechanism is arranged on the concrete cutting mechanism for limiting the distance between the concrete cutting mechanism and the surface of the tunnel secondary lining concrete (34). The guiding mechanism is respectively arranged on the concrete cutting mechanism and the surface of the tunnel secondary lining concrete (34) for guiding the concrete cutting mechanism to move axially along the construction joint (33). The dust suction mechanism is arranged on the concrete cutting mechanism for adsorbing the dust after cutting the construction joint (33).

10. A cutting method using a circumferential intelligent cutting device for the construction joint of the secondary lining of a tunnel as described in any one of claims 1-9, characterized in that, It includes the following steps: Step 1: Move the device to the position of the construction joint (33) and clean the concrete on both sides of the construction joint (33). Step 2: Adjust the mobile support frame and the lifting mechanism so that the concrete cutting mechanism is vertically aligned with the construction joint (33) and is located at one end of the construction joint (33). Step 3: Start the lifting mechanism to gradually rise. First, drive the concrete cutting mechanism to obliquely cut into the tunnel secondary lining concrete through the simultaneous movement of the longitudinal displacement adjusting mechanism and the transverse sliding mechanism until the radial cutting position of the construction joint (33). Step 4, drive the concrete cutting mechanism to move axially along the construction joint (33) by the transverse sliding mechanism and cut to the other end of the construction joint (33).

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