A support device for soft rock tunnel excavation

Abstract

The present invention provides a support device for soft rock tunnel excavation, which includes a scaffold unit, a detection unit and a discharge unit. The scaffold unit includes a support frame and a bottom plate arranged on the lower side of the support frame; the detection unit includes an arc-shaped plate arranged on the support frame and a driving mechanism arranged on the lower side of the arc-shaped plate. A percussion plate is arranged on one side of the output end of the driving mechanism, and an avoidance groove corresponding to the percussion plate is formed at the top of the arc-shaped part; the discharge unit includes a scraper movably arranged on one side of the flat part and a discharge hole formed on the flat part. The loosened soil blocks are knocked down by the percussion plate to reduce the potential risks and hazards in the later construction. And through the scraper arranged on the arc-shaped plate and the discharge hole formed on the arc-shaped plate, a collection frame is arranged under the discharge hole. The soil blocks and accumulated water falling on the arc-shaped part will move along the top surface of the arc-shaped part to the flat part and are collected into the collection frame through the scraper and the discharge hole, which is convenient for cleaning and discharging, and eliminates the safety hazards in the tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel excavation, and particularly relates to a support device for soft rock tunnel excavation. Background Art

[0002] A soft rock tunnel refers to a tunnel constructed in soft surrounding rock. Due to the characteristics of soft rock such as low strength, large deformation, and softening when encountering water, it brings certain difficulties to the design and construction of the tunnel and even the long-term stability of the lining structure. Soft rock usually has rheological properties, and the stress in the surrounding rock and the pressure exerted by the surrounding rock on the tunnel structure develop and change over time.

[0003] In the prior art, due to the characteristics of soft rock such as low strength, large deformation, and softening when encountering water, when supporting the excavation of a soft rock tunnel, it is impossible to timely drain the accumulated water at the top of the tunnel, and it is also impossible to discharge the loose soil blocks at the top of the tunnel, thus posing a safety hazard to the construction operations inside the tunnel. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a support device for soft rock tunnel excavation, aiming to solve the technical problem of the inability to discharge loose soil blocks and the existence of safety hazards in the prior art.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: A support device for soft rock tunnel excavation includes a scaffold unit, a detection unit, and a discharge unit. The scaffold unit includes a support frame and a bottom plate provided on the lower side of the support frame; the detection unit includes an arc plate provided on the support frame and a driving mechanism provided on the lower side of the arc plate. The arc plate includes an arc portion and flat plate portions extending from both sides of the arc portion. A percussion plate is provided on one side of the output end of the driving mechanism, and an avoidance groove corresponding to the percussion plate is opened at the top of the arc portion; the discharge unit includes a scraper movably provided on one side of the flat plate portion and a discharge hole opened on the flat plate portion. The discharge unit further includes a collection frame provided below the discharge hole.

[0006] Compared with the prior art, the beneficial effects of the present invention are: by setting a tripod unit, an arc-shaped plate for supporting the top of the tunnel is provided on the tripod unit, and at the same time, a detection unit is set, the detection unit includes a driving mechanism arranged on the lower side of the arc-shaped plate, the arc-shaped plate includes an arc-shaped portion and a flat plate portion extended from both sides of the arc-shaped portion, a knocking plate is provided on one side of the output end of the driving mechanism, and an avoidance groove corresponding to the knocking plate is opened on the top of the arc-shaped portion, and the loose soil blocks are knocked down by the knocking plate to reduce the risk of late construction, and by setting a discharge unit, the discharge unit includes a scraper provided on one side of the flat plate portion, and a discharge hole provided on the flat plate portion, and a collecting rack is provided on the lower side of the discharge hole, the soil blocks and accumulated water falling on the arc-shaped portion will move along the top surface of the arc-shaped portion to the flat plate portion, and are collected in the collecting rack through the scraper and the discharge hole, which is convenient for cleaning and discharge, eliminating safety hazards in the tunnel.

[0007] According to one aspect of the above technical solution, the tripod unit further includes a lifting mechanism provided between the base plate and the support frame.

[0008] According to one aspect of the above technical solution, the lifting mechanism includes two side frames arranged on both sides of the base plate, two sliders are slidably provided on both sides of the side frames, two lifting plates are staggered between the two side frames, the lower ends of the lifting plates are connected to the sliders, a round rod is rotatably provided between the two lifting plates, a hydraulic cylinder is hinged at the middle part of the base plate, one end of the hydraulic cylinder is connected to the round rod, a slide groove is provided at the bottom of the support frame, and a sliding shaft is provided at the end of the lifting plate away from the slider, and the sliding shaft is slidably arranged in the slide groove.

[0009] According to one aspect of the above technical solution, the tripod unit also includes an edging mechanism, which includes a side plate arranged on the support frame, a fixing box fixed to one side of the side plate, and two rotating plates rotatably arranged on both sides of the side plate. A fastening plate is provided at one end of the rotating plate away from the support frame, and a stabilizing frame is movably provided on the fixing box. The two fastening plates are respectively used to limit and clamp the two sides of the stabilizing frame. A pin hole is opened on the rotating plate, and a stabilizing plate is rotatably installed in the pin hole. The stabilizing plate is rotatably arranged on the side of the stabilizing frame away from the rotating plate.

[0010] According to one aspect of the above technical solution, a groove is provided on the fixing box, a fixing plate is provided in the groove, an adjusting rod is screwed on the fixing plate, a push plate is rotatably provided at one end of the adjusting rod, the push plate is connected to the stabilizing frame, a guide rod is provided at one end of the push plate, and the guide rod is penetrated and arranged on the fixing plate.

[0011] According to one aspect of the above technical solution, the support device for soft rock tunnel excavation also includes a fixing unit arranged between the tripod unit and the detection unit, the fixing unit includes a bracket, the bracket is provided with a through slot, an arc frame is provided in the through slot, an electric push rod is provided in the middle of the arc frame, a clamping plate is connected to one side of the electric push rod, and a clamping slot corresponding to the clamping plate is opened on one side of the arc plate.

[0012] According to one aspect of the above technical solution, a rectangular box is fixed to the top of the stabilizing frame, a pull rod is provided on the top of the rectangular box, a first wedge block is provided at one end of the pull rod, and a clamping rod is installed on both sides of the rectangular box in a spring sliding manner. Telescopic plates are provided at both ends of the bracket, and a locking piece is provided on one side of the telescopic plate. A locking groove corresponding to the clamping rod is provided on the locking piece, and a second wedge block in contact with the first wedge block is provided at one end of the clamping rod close to the pull rod. When the pull rod is moved to make the first wedge block move away from the second wedge block, the clamping rod moves toward the middle side of the rectangular box under the elastic action of the spring to exit the locking groove.

[0013] According to one aspect of the above technical solution, the driving mechanism includes a hanging plate arranged at the lower part of the arc-shaped plate, a rotating shaft is rotatably provided on the hanging plate, a cam is provided at one end of the rotating shaft, and the cam is arranged corresponding to the knocking plate.

[0014] According to one aspect of the above technical solution, the discharge unit also includes a threaded rod provided on one side of the top of the flat plate portion, a movable block slidably connected to the arc block is threadedly provided on the threaded rod, a connecting rod is fixed to one side of the movable block, the scraper is rotatably provided on the flat plate portion through a mounting pin, a movable groove is provided in the middle of the scraper, a pulling member is rotatably provided on one side of the connecting rod, and the pulling member is slidably provided in the movable groove on the side away from the connecting rod.

[0015] According to one aspect of the above technical solution, the discharge unit also includes a soil discharge motor arranged on one side of the collecting rack, the output shaft of the soil discharge motor is provided with a central shaft, a conveying plate is provided on the central shaft, and a filter plate is provided on the bottom side of the collecting rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram from a first perspective of a support device for soft rock tunnel excavation according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic structural diagram of a support device for soft rock tunnel excavation from a second perspective according to an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a tripod unit according to an embodiment of the present invention;

[0019] Figure 4 is Figure 3 The enlarged view of part A in

[0020] Figure 5 The structural schematic diagram of the arc-shaped plate in an embodiment of the present invention;

[0021] Figure 6 is Figure 5 The enlarged view of part B in

[0022] Figure 7 is Figure 5 The enlarged view of part C in

[0023] Figure 8 The partial structural schematic diagram of the tripod unit in an embodiment of the present invention;

[0024] Figure 9 The partial front-sectional structural schematic diagram of the arc-shaped plate in an embodiment of the present invention;

[0025] Figure 10 is Figure 9 The enlarged view of part D in

[0026] Figure 11 The structural schematic diagram of the fixing unit from the first perspective in an embodiment of the present invention;

[0027] Figure 12 The structural schematic diagram of the fixing unit from the second perspective in an embodiment of the present invention;

[0028] Figure 13 The partial structural schematic diagram of the lower side of the arc-shaped plate in an embodiment of the present invention;

[0029] Figure 14 The structural schematic diagram of the drainage member in an embodiment of the present invention;

[0030] Figure 15 The internal sectional structural schematic diagram of the collection rack in an embodiment of the present invention; Main element symbol description:

[0031]

[0032]

[0033] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific Embodiments

[0034] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Please refer to Figures 1 to 15 , which shows a support device for soft rock tunnel excavation in an embodiment of the present invention, including:

[0038] The scaffold unit 1, the scaffold unit 1 includes a support frame 13 and a bottom plate 11 provided on the lower side of the support frame 13;

[0039] The detection unit 3, the detection unit 3 includes an arc plate 31 provided on the support frame 13, and a driving mechanism provided on the lower side of the arc plate 31. The arc plate 31 includes an arc portion and flat plate portions extending from both sides of the arc portion. A knocking plate 37 is provided on one side of the output end of the driving mechanism, and an avoidance groove corresponding to the knocking plate 37 is opened at the top of the arc portion;

[0040] The discharge unit 5, the discharge unit 5 includes a scraper 57 movably provided on one side of the flat plate portion, and a discharge hole opened on the flat plate portion. The discharge unit 5 further includes a collection rack 59 provided below the discharge hole.

[0041] The support device for soft rock tunnel excavation in this embodiment is provided with a scaffold unit 1. An arc-shaped plate 31 for supporting the top of the tunnel is arranged on the scaffold unit 1. At the same time, a detection unit 3 is provided. The detection unit 3 includes a driving mechanism arranged on the lower side of the arc-shaped plate 31. The arc-shaped plate 31 includes an arc-shaped part and flat plate parts extending from both sides of the arc-shaped part. A knocking plate 37 is arranged on one side of the output end of the driving mechanism. An avoidance groove corresponding to the knocking plate 37 is opened at the top of the arc-shaped part. The knocking plate 37 knocks down the loosened soil blocks to reduce the potential risks and hazards in the later construction. And a discharge unit 5 is provided. The discharge unit 5 includes a scraping plate 57 arranged on one side of the flat plate part and a discharge hole arranged on the flat plate part. A collection rack 59 is arranged below the discharge hole. The soil blocks and accumulated water falling on the arc-shaped part will move along the top surface of the arc-shaped part to the flat plate part and are collected into the collection rack 59 through the scraping plate 57 and the discharge hole, which is convenient for cleaning and discharging and eliminates the safety hazards in the tunnel.

[0042] Preferably, in this embodiment, the above-mentioned scaffold unit 1 further includes a lifting mechanism arranged between the bottom plate 11 and the support frame 13. By arranging the above-mentioned lifting mechanism, it is convenient to adaptively adjust the height of the arc-shaped plate 31 according to the different lengths of the tunnel, improving the applicability of the device.

[0043] Furthermore, as Figure 8 shown, in this embodiment, the above-mentioned lifting mechanism includes two side frames 12 arranged on both sides of the bottom plate 11. Two sliders are respectively arranged on both sides of each side frame 12 in a sliding manner. Two lifting plates 15 are staggered between the two side frames 12. The lower ends of both ends of the lifting plate 15 are connected to the sliders. A round rod 99 is rotatably arranged between the two lifting plates 15. The middle part of the bottom plate 11 is hinged with a hydraulic cylinder 88. One end of the hydraulic cylinder 88 is connected to the round rod 99. A chute 14 is opened at the bottom of the support frame 13. A sliding shaft 16 is arranged at the end of the lifting plate 15 far away from the slider. The sliding shaft 16 is slidably arranged in the chute 14. Specifically, in this embodiment, by starting the above-mentioned hydraulic cylinder to drive the round rod 99 to move, at this time, the two sliders in the chutes 14 on the same side of the support frame 13 move closer to / away from each other to realize the lifting of the support frame 13.

[0044] Preferably, in this embodiment, the tripod unit 1 further includes a side attachment mechanism. The side attachment mechanism includes a side plate 171 provided on the support frame 13, a fixed box 172 fixed to one side of the side plate 171, and two rotating plates 173 rotatably provided on both sides of the side plate 171. A fastening plate 175 is provided at one end of the rotating plate 173 away from the support frame 13. A stabilizing frame 179 is movably provided on the fixed box 172. The two fastening plates 175 are respectively used for limiting and clamping both sides of the stabilizing frame 179. A pin hole 174 is formed in the rotating plate 173, and a stabilizing plate is rotatably installed in the pin hole 174. One side of the stabilizing plate away from the rotating plate 173 is rotatably provided on the side of the stabilizing frame 179. In some application scenarios of this embodiment, the stabilizing frame 179 is movably provided for closely adhering to the inner side of the tunnel, making the whole device more stable when supporting the inside of the tunnel.

[0045] Specifically, in this embodiment, a groove is provided on the fixed box 172, and a fixing plate 176 is provided in the groove. An adjusting rod 177 is screwed on the fixing plate 176. One end of the adjusting rod 177 is rotatably provided with a push plate 178. The push plate 178 is connected to the stabilizing frame 179. A guide rod is provided at one end of the push plate 178, and the guide rod is penetratively provided on the fixing plate 176. In some application scenarios of this embodiment, by rotating the adjusting rod 177, the push plate 178 will be moved back and forth when the adjusting rod 177 rotates. When the push plate 178 moves, it will push the stabilizing frame 179, so that the stabilizing frame 179 fits the side of the tunnel, thereby increasing the contact surface between the stabilizing frame 179 and the side wall inside the tunnel and improving the support effect of the whole device.

[0046] Preferably, in this embodiment, the support device for soft rock tunnel excavation further includes a fixing unit 2 disposed between the scaffold unit 1 and the detection unit 3. The fixing unit 2 includes a bracket 21. A through groove 22 is provided on the bracket 21. An arc-shaped frame 23 is provided in the through groove 22. An electric push rod 25 is provided in the middle of the arc-shaped frame 23. A clamping plate 24 is connected to one side of the electric push rod 25. A clamping groove corresponding to the clamping plate 24 is provided on one side of the arc-shaped plate 31. Specifically, in this embodiment, a placement groove is provided in the middle of the bracket 21. The electric push rod 25 is located in the placement groove. A retracting frame 26 is rotatably provided in the placement groove. The output shaft of the electric push rod 25 is rotatably connected to the retracting frame 26. A pulling plate 28 is provided at one end of the retracting frame 26. The pulling plate 28 and the clamping plate 24 are connected by a connecting member 27. In some application scenarios of this embodiment, the retracting frame 26 is flipped by the contraction of the electric push rod 25. When the retracting frame 26 is flipped, the connecting member 27 is driven by the pulling plate 28 to make the clamping plate 24 slide. The clamping plate 24 slides into the clamping groove of the arc-shaped plate 31, completing the assembly of the arc-shaped plate 31 and the fixing unit 2, so as to facilitate the quick assembly and fixation between the detection unit 3 and the fixing unit 2 and improve the support efficiency during tunnel excavation.

[0047] Preferably, in this embodiment, the arc-shaped plate 31 is a multi-section assembled structure. Clamping grooves are provided at the lower parts of the arc-shaped plates 31 on both sides. The clamping plate 24 is placed in the clamping groove for assembling the arc-shaped plate 31 and the fixing unit 2. By setting the arc-shaped plate 31 as a multi-section assembled structure, it is convenient to adjust the length of the whole device according to the length usage requirements of the tunnel.

[0048] Preferably, in this embodiment, a rectangular box 1710 is fixed to the top of the stabilizing frame 179. A pull rod 1711 is provided on the top of the rectangular box 1710. A first wedge block is provided at one end of the pull rod 1711. Clamping rods 1712 are slidably installed on both sides of the rectangular box 1710 through springs. Expansion plates 29 are provided at both ends of the bracket 21. A locking member 290 is provided on one side of the expansion plate 29. A locking groove corresponding to the clamping rod 1712 is provided on the locking member 290. A second wedge block in contact with the first wedge block is provided at one end of the clamping rod 1712 close to the pull rod 1711. When the pull rod 1711 is moved to make the first wedge block away from the second wedge block, the clamping rod 1712 moves toward the middle side of the rectangular box 1710 under the elastic action of the spring to withdraw from the locking groove.

[0049] Specifically, in this embodiment, the above-mentioned pull rod 1711 is rotatably arranged in the rectangular box 1710, and the first wedge block is arranged on its lower side. In some application scenarios of this embodiment, by rotating the pull rod 1711, the first wedge block on the pull rod 1711 cancels the extrusion of the second wedge blocks on the two side clamping rods 1712. Under the action of the spring, the two side clamping rods 1712 will retract into the rectangular box 1710. Subsequently, the two sides of the bracket 21 are respectively placed on the upper part of the stabilizing frame 179, so that the locking member 290 is located outside the rectangular box 1710. Then, the pull rod 1711 is rotated in the reverse direction to enable the two side clamping rods 1712 in the rectangular box 1710 to lock the locking member 290, thereby realizing the assembly and fixation between the fixing unit 2 and the tripod unit 1.

[0050] Preferably, in this embodiment, the above-mentioned driving mechanism includes a suspension plate 32 arranged at the lower part of the arc plate 31. A rotating shaft 33 is rotatably arranged on the suspension plate 32. One end of the rotating shaft 33 is provided with a cam 35, and the cam 35 is arranged corresponding to the knocking plate 37. Specifically, in this embodiment, a plurality of avoidance grooves corresponding to the knocking plate 37 are formed on the arc plate 31. Two knocking plates 37 are arranged in each avoidance groove. Two rotating shafts 33 are arranged on the suspension plate 32. One of the rotating shafts 33 is connected with a driving motor 36. The two rotating shafts 33 are driven by a gear 34 group to realize the synchronous operation of the two knocking plates 37. Preferably, the cams 35 on the two rotating shafts 33 are arranged oppositely. In some application scenarios of this embodiment, by starting the driving motor 36 to drive the rotating shaft 33 and the cam 35 on the rotating shaft 33 to rotate, the other cam 35 rotates synchronously based on the gear 34 group, driving the knocking plate 37 on the cam 35 to move. Since the placement directions of the two cams 35 are opposite, during operation, the two knocking plates 37 operate alternately up and down, thereby improving the knocking efficiency.

[0051] Preferably, in this embodiment, the discharging unit 5 further includes a threaded rod 51 provided on one side of the top of the flat plate portion. A moving block 55 slidably connected to the arc-shaped block is screwed onto the threaded rod 51. A connecting rod 56 is fixed to one side of the moving block 55. The scraping plate 57 is rotatably provided on the flat plate portion through a mounting pin. A moving groove is formed in the middle of the scraping plate 57. A pulling member 58 is rotatably provided on one side of the connecting rod 56. The side of the pulling member 58 away from the connecting rod 56 is slidably provided in the moving groove. Specifically, in this embodiment, a plurality of discharging holes are evenly spaced on the flat plate portion, and a scraping plate 57 is correspondingly provided at each discharging hole. The threaded rod 51 is provided outside the flat plate portion. Belt wheels 52 are provided on the threaded rods 51 on both sides of the arc-shaped plate 31. A belt 53 is sleeved between the belt wheels 52 for transmission. A driving member 54 is provided on one side of one of the threaded rods 51 away from the belt wheel 52. By driving the threaded rod 51 to rotate through the driving member 54, the moving block 55 is driven to move. Through the movement of the connecting rod 56, the scraping plate 57 is pulled to swing, so as to clean and discharge the accumulated water and fallen soil blocks on the top of the tunnel, and eliminate the potential safety hazards in the tunnel.

[0052] Preferably, in this embodiment, the discharging unit 5 further includes an earth discharging motor 591 provided on one side of the collecting frame 59. A central shaft 592 is provided on the output shaft of the earth discharging motor 591. A conveying plate 593 is provided on the central shaft 592. A filter plate 590 is provided on one side of the bottom of the collecting frame 59. Specifically, in this embodiment, a drainage member 594 is further provided on one side of the collecting frame 59 close to the filter plate 590. The drainage member 594 is a drainage pump provided on one side of the filter plate 590 and a drain pipe connected to the drainage pump. In some application scenarios of this embodiment, when the earth discharging motor 591 is turned on, it drives the central shaft 592 to rotate. The rotation of the central shaft 592 facilitates collecting the soil blocks into the collecting frame 59 for subsequent unified cleaning and collection, and the accumulated water can be timely discharged through the drainage member 594 from the drain pipe.

[0053] For easy understanding, in some application scenarios of this embodiment, the supporting method of the supporting device for soft rock tunnel excavation includes the following steps:

[0054] S1: Positioning and placing:

[0055] Place the tripod unit 1 at the required position according to the requirements, assemble and fix the fixing unit 2 with the tripod unit 1. Select a suitable arc-shaped plate 31 according to the arc of the tunnel top and fix it with the fixing unit 2. Finally, lift the tripod unit 1 by turning on the hydraulic cylinder until the top of the arc-shaped plate 31 fits the top inside the tunnel.

[0056] S2: Detection of the tunnel top:

[0057] Start the drive motor 36. The drive motor 36 drives the rotation of the rotating shaft 33 on one side. The rotating shaft 33 drives the cams 35 on the rotating shafts 33 on both sides to rotate through the gears 34 on both sides meshing with each other. The cams 35 on both sides rotate in cooperation to make the knocking plates 37 on both sides alternately knock up and down, which is convenient for knocking down the loosened soil clods and at the same time facilitating the quick detection of defects in a specific area.

[0058] S3: Discharge of soil clods and accumulated water:

[0059] The knocking plates 37 alternately knock up and down to knock down the loosened soil clods. While eliminating the danger, the accumulated water on the top of the tunnel drips onto the arc-shaped plate 31. The inclined plates on both sides of the arc-shaped plate 31 guide the accumulated water until the accumulated water and soil clods are at the discharge holes. Subsequently, the driving member 54 is started to drive the rotation of the threaded rod 51. Finally, the scraping plate 57 pushes the accumulated water and soil clods into the collection rack 59, and the filter plate 590 classifies and discharges the accumulated water and soil clods.

[0060] When the present invention is in use, first, multiple sets of scaffold units 1 are placed according to the space inside the tunnel. The scaffold units 1 are placed at the required positions, including horizontal and vertical placement between multiple sets of scaffold units 1. The fixing unit is assembled and fixed with the scaffold unit 1. The arc-shaped plate 31 adapted to the arc of the tunnel top is assembled and fixed with the fixing unit 2. When fixing, first, the two ends of the assembled arc-shaped plate 31 are respectively placed on the stable frames 179, so that the locking member 290 is located outside the rectangular box 1710. Subsequently, the pull rod 1711 is rotated reversely to make the clamping rods 1712 on both sides inside the rectangular box 1710 lock the locking member 290, completing the assembly and fixing between the fixing unit 2 and the scaffold unit 1.

[0061] When removing the danger from the top of the tunnel, start the drive motor 36. The drive motor 36 drives the rotation of the rotating shaft 33 on one side. The rotating shaft 33 drives the cams 35 on the rotating shafts 33 on both sides to rotate through the gears 34 on both sides meshing with each other. Since the cams 35 on the rotating shafts 33 on both sides are arranged oppositely, the cams 35 on both sides can rotate in cooperation to make the knocking plates 37 on both sides alternately knock up and down to remove the loosened soil clods in the soft rock tunnel.

[0062] When discharging the accumulated water and soil clods, start the soil discharging motor 591. The soil discharging motor 591 drives the rotation of the central shaft 592. The rotation of the central shaft 592 drives the sliding of the moving block 55. When the moving block 55 slides, it pulls the scraping plate 57 through the connecting rod 56 to clean the accumulated water and the fallen soil clods on the top of the tunnel. Finally, the soil clods are collected into the collection rack 59 through the drainage member 594 for subsequent unified cleaning and collection. And the collection rack 59 is provided with water leakage holes to facilitate the timely discharge of the accumulated water, so as to eliminate the safety hazards in the tunnel.

[0063] In summary, for the support device for soft rock tunnel excavation in this embodiment, by providing the scaffold unit 1, the scaffold unit 1 is convenient for moving freely. After moving, multiple sets of scaffold units 1 are convenient for adaptive adjustment according to different widths and lengths in the tunnel, making the applicability of the entire device more extensive; by providing the locking member 290 and the clamping rod 1712, by rotating the pull rod 1711, the first wedge block on the pull rod 1711 cancels the extrusion of the second wedge blocks on the two side clamping rods 1712. Under the action of the spring, the two side clamping rods 1712 will retract the clamping rod 1712 into the rectangular box 1710. Subsequently, both sides of the bracket 21 are respectively placed on the upper part of the stable frame 179, so that the locking member 290 is located outside the rectangular box 1710. Then, rotate the pull rod 1711 in the reverse direction so that the clamping rods 1712 on both sides in the rectangular box 1710 lock the locking member 290, thereby realizing the assembly and fixation between the fixing unit 2 and the scaffold unit 1; by providing the electric push rod 25, the telescopic movement of the electric push rod 25 is used to flip the retracting and pulling frame 26. When the retracting and pulling frame 26 flips, the connecting member 27 is driven by the pulling plate 28 to make the clamping plate 24 slide. The up and down sliding of the clamping plate 24 is used for the assembly of the detection unit 3, so as to facilitate the quick assembly and fixation between the detection unit 3 and the fixing unit 2, improving the support efficiency during tunnel excavation; by providing the discharging unit 5, when the threaded rod 51 rotates, it is used to drive a plurality of moving blocks 55 to slide. When the moving blocks 55 slide, the scraping plate 57 is pulled by the connecting rod 56 to clean and discharge the accumulated water and fallen soil blocks on the top of the tunnel, eliminating potential safety hazards in the tunnel.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A support device for soft rock tunnel excavation, characterized in that Comprising: A tripod unit, the tripod unit including a support frame and a bottom plate provided on the lower side of the support frame; A detection unit, the detection unit including an arc plate provided on the support frame and a driving mechanism provided on the lower side of the arc plate. The arc plate includes an arc portion and flat plate portions extending from both sides of the arc portion. A knocking plate is provided on one side of the output end of the driving mechanism, and an avoidance groove corresponding to the knocking plate is opened at the top of the arc portion; A discharging unit, the discharging unit including a scraper movably provided on one side of the flat plate portion and a discharging hole opened on the flat plate portion. The discharging unit further includes a collecting rack provided below the discharging hole; The driving mechanism includes a hanging plate provided at the lower part of the arc plate. A rotating shaft is rotatably provided on the hanging plate. One end of the rotating shaft is provided with a cam, and the cam is correspondingly arranged with the knocking plate; The discharging unit further includes a threaded rod provided on one side of the top of the flat plate portion. A moving block slidably connected to the arc plate is screwed on the threaded rod. One side of the moving block is fixed with a connecting rod. The scraper is rotatably provided on the flat plate portion through a mounting pin. A moving groove is opened in the middle of the scraper. One side of the connecting rod is rotatably provided with a pulling member, and the side of the pulling member away from the connecting rod is slidably provided in the moving groove; The discharging unit further includes an earth discharging motor provided on one side of the collecting rack. A central shaft is provided on the output shaft of the earth discharging motor. A conveying plate is provided on the central shaft. A filter plate is provided on one side of the bottom of the collecting rack.

2. The support device for soft rock tunnel excavation according to claim 1, characterized in that, The tripod unit further includes a lifting mechanism provided between the bottom plate and the support frame.

3. The support device for soft rock tunnel excavation according to claim 2, wherein The lifting mechanism includes two side frames provided on both sides of the bottom plate. Two sliders are respectively slidably provided on both sides of the side frames. Two lifting plates are staggered between the two side frames. The lower ends of the two ends of the lifting plate are connected to the sliders. A round rod is rotatably provided between the two lifting plates. The middle of the bottom plate is hinged with a hydraulic cylinder. One end of the hydraulic cylinder is connected to the round rod. A chute is opened at the bottom of the support frame. A sliding shaft is provided at the end of the lifting plate away from the slider, and the sliding shaft is slidably provided in the chute.

4. The supporting device for soft rock tunnel excavation according to claim 1, characterized in that, The tripod unit further includes a side attachment mechanism. The side attachment mechanism includes a side plate provided on the support frame, a fixed box fixed on one side of the side plate, and two rotating plates rotatably provided on both sides of the side plate. A fastening plate is provided at the end of the rotating plate away from the support frame. A stabilizing frame is movably provided on the fixed box. The two fastening plates are respectively used for limiting and clamping both sides of the stabilizing frame. A pin hole is opened on the rotating plate, and a stabilizing plate is rotatably installed in the pin hole. The side of the stabilizing plate away from the rotating plate is rotatably provided on the side of the stabilizing frame.

5. The support device for soft rock tunnel excavation according to claim 4, characterized in that, A groove is provided on the fixed box. A fixing plate is provided in the groove. An adjusting rod is screwed on the fixing plate. One end of the adjusting rod is rotatably provided with a pushing plate. The pushing plate is connected to the stabilizing frame. A guiding rod is provided at one end of the pushing plate, and the guiding rod is penetratively provided on the fixing plate.

6. The support device for soft rock tunnel excavation according to claim 4, wherein, The supporting device for soft rock tunnel excavation further includes a fixing unit disposed between the scaffold unit and the detection unit. The fixing unit includes a bracket, on which a through groove is provided. An arc-shaped frame is arranged in the through groove. An electric push rod is provided in the middle of the arc-shaped frame. A clamping plate is connected to one side of the electric push rod. A clamping groove corresponding to the clamping plate is formed on one side of the arc-shaped plate.

7. The supporting device for soft rock tunnel excavation according to claim 6, characterized in that, A rectangular box is fixed to the top of the stabilizing frame. A pull rod is provided on the top of the rectangular box. A first wedge-shaped block is arranged at one end of the pull rod. Clamping rods are slidably installed on both sides of the rectangular box through springs. Telescopic plates are arranged at both ends of the bracket. A locking member is provided on one side of the telescopic plate. A locking groove corresponding to the clamping rod is formed on the locking member. A second wedge-shaped block in contact with the first wedge-shaped block is arranged at one end of the clamping rod close to the pull rod. When the pull rod is moved to make the first wedge-shaped block away from the second wedge-shaped block, the clamping rod moves towards the middle side of the rectangular box under the elastic action of the spring to withdraw from the locking groove.

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