A kind of rock slope greening protection slope protection at the tunnel entrance

Abstract

The present invention relates to the technical field of slope protection and greening, and discloses a greening protection slope protection for rock slopes at tunnel entrances, which includes an interception component arranged at the bottom of the slope and above the tunnel entrance, a protection net arranged at the top of the slope, and a greening protection component arranged between the protection net and the interception component. Among them: the greening protection components are arranged in several rows along the slope surface, and each row of greening protection components includes several groups of anchoring mechanisms, and the anchoring mechanisms are installed along the cracks on the surface of the rock slope, and vegetation climbing nets are installed on the anchoring mechanisms in the same row. The present invention can be quickly fixed on the slope, the construction steps are simple, and manpower and material resources are saved. The present invention can strengthen cracks and delay the development of rock cracks. At the same time, the slope protection structure is used to plant climbing vegetation, thereby reducing the adverse effects of sunlight exposure and rain erosion on the stability of the slope.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection and greening, and in particular to a slope protection and greening protection for rock slopes at tunnel openings. Background Art

[0002] There are many methods of slope protection, including: shotcrete, slope-attached concrete, formwork bag concrete, steel cage, stone masonry, geotextile and vegetation cover, etc. Among them, the most commonly used is the use of concrete or stone masonry slope protection. Although this method has a good slope protection effect, it cannot form a green belt on the slope surface and causes serious environmental damage.

[0003] At present, most rock slopes adopt the conventional slope protection scheme of first excavation and then masonry. This scheme is difficult to construct, has a long construction period, and consumes manpower and material resources. Regarding the protection of rock slopes, since the slopes are mostly composed of rocks, and there are irregular cracks of different lengths and widths between the rocks, how to avoid or slow down the development of rock cracks on the slopes is the core issue of stabilizing the slopes. Based on this, the present application proposes a greening protection slope protection for the rock slopes at the tunnel entrance. Summary of the invention

[0004] In order to solve the technical problems raised in the background technology, the present invention provides a tunnel entrance rock slope greening protection slope protection.

[0005] The present invention is implemented by the following technical scheme: a tunnel entrance rock slope greening protection slope protection, including an interception component arranged at the bottom of the slope and above the tunnel entrance, a protection net arranged at the top of the slope, and a greening protection component arranged between the protection net and the interception component.

[0006] Among them: the greening protection components are arranged in several rows along the slope surface, each row of greening protection components includes several groups of anchoring mechanisms, the anchoring mechanisms are installed along the cracks on the slope surface, and vegetation climbing nets are installed on the anchoring mechanisms in the same row.

[0007] The anchoring mechanism comprises a base plate, an intermediate support rod rotatably mounted in the middle of the base plate, two groups of anchoring units mounted at both ends of the base plate, and two groups of tensioning members respectively connecting the anchoring units and the intermediate support rod.

[0008] As a further improvement of the above scheme, the anchor mechanism includes a hollow anchor rod and an inner tube arranged in the anchor rod, wherein the anchor rod is installed in a drilled hole at the crack, an annular grouting chamber is formed between the inner tube and the inner wall of the anchor rod, and a plurality of grouting outlets connected to the grouting chamber are provided on the outer wall of the anchor rod, and a top cover is detachably installed at the top end of the anchor rod, a center hole connected to the inner tube is provided on the top cover, and a connecting pipe is also installed on the top cover. It is used to inject concrete into the crack through the connecting pipe in the anchor mechanism, thereby strengthening the slope protection and fixing the anchor mechanism in the slope body of the slope protection.

[0009] As a further improvement of the above scheme, a measuring cylinder is fixed at the bottom of the anchor rod, the measuring cylinder is used to extend into the crack, a mounting box is installed on the top of the inner cylinder, the shell of the measuring cylinder is symmetrically provided with perforations, a contact head is slidably installed at the perforations, the outer end of the contact head contacts the inner wall of the crack, a movable rod is fixed at the inner end of the contact head, a mounting box is installed on the top of the inner cylinder, and a displacement measurement module is arranged in the mounting box to measure the displacement of the movable rod connected to the contact head. It is used to monitor in real time whether the crack is developing and expanding, thereby playing a certain early warning role.

[0010] As a further improvement of the above scheme, the displacement measurement module includes a test box arranged in the installation box, two distance sensors corresponding to the movable rod are installed in the test box, a stepped hole is provided in the installation box, the movable rod is movably arranged in the stepped hole, and the top of the movable rod extends into the test box and is respectively arranged adjacent to the two distance sensors, and the top of the installation box is detachably connected with a connecting column. The above displacement measurement module is easy to install and use, and the arranged sensor can be connected to the external controller signal through a wireless signal, thereby realizing real-time signal transmission and monitoring whether there is a risk in the slope.

[0011] As a further improvement of the above solution, the tensioning member includes a steel cable, one end of which is connected to a movable block, which is used to slide and connect with the middle support rod along its length direction, and the other end of the steel cable is connected to a quick connector, which is used to fix with the connecting column. The middle support rod can be fixed by the tensioning member, so that the erected middle support rod can play a certain protective role when geological disasters such as rockfall occur on the slope.

[0012] As a further improvement of the above scheme, the quick connector includes sleeve 1, sleeve 2, a threaded connection part and a limiting ring. Sleeve 1 and sleeve 2 are coaxially arranged. The outer diameter of sleeve 1 is larger than the outer diameter of sleeve 2. The limiting ring is spirally connected to one end of sleeve 2. One end of the threaded connection part is rotatably sleeved on sleeve 2 inside the limiting ring. The other end of the threaded connection part is used to connect with the screw hole fixed on the connecting column. Sleeve 1 is distributed with a plurality of threaded holes. Positioning bolts are installed at the threaded holes to fix the steel cable inserted into sleeve 1. The steel cable can be locked by the quick connector to facilitate its connection with the external structure.

[0013] As a further improvement of the above scheme, a plurality of slots are distributed circumferentially on one side port of sleeve 1, and a card plate is movably provided at each slot, and the inner side of the card plate is provided with card teeth for engaging the steel cable, and a through hole corresponding to the slot is also provided in sleeve 1, and a positioning rod is movably provided at the through hole, and an annular sleeve is fixed to the outer end of the positioning rod, and a movable sleeve is movably connected to the outer side of sleeve 1 along its axial direction, and one end of the movable sleeve is used to squeeze the annular sleeve to drive the positioning rod to squeeze the card plate and move radially along sleeve 1, and a resistance mechanism is also installed on the threaded connection part to push the movable sleeve to move. The steel cable can be further fixed, and the resistance mechanism is used to push the positioning rod to squeeze the card plate to engage with the surface of the steel cable.

[0014] As a further improvement of the above scheme, the interference mechanism includes push rod one and push rod two, a cavity is opened in the threaded connection part, an intermediate connection part is movably provided in the cavity, one end of push rod one and push rod two is respectively connected to the intermediate connection part, and the other end of push rod one and push rod two is respectively in conflict with the movable sleeve and the limit ring.

[0015] As a further improvement of the above scheme, the outer side of the steel cable is provided with an outer tube, and a splint is detachably connected to the outer side of the outer tube, and the vegetation climbing net can pass through the gap between the splint and the outer tube. It is convenient to use each steel cable to support the vegetation climbing net, and the function of the splint is to quickly fix the vegetation climbing net.

[0016] As a further improvement of the above scheme, a plurality of positioning holes are distributed on the surface of the outer cylinder along its length direction, and a positioning rod corresponding to the positioning holes is provided on one side of the clamping plate. The positioning rod is used to pass through the mesh holes on the vegetation climbing net, and the clamping plate is connected to the outer cylinder by a locking bolt.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention proposes a tunnel entrance rock slope greening protection slope protection, comprising an interception assembly arranged at the bottom of the slope and above the tunnel entrance, a protection net arranged at the top of the slope, and a greening protection assembly arranged between the protection net and the interception assembly. Among them: the greening protection assembly is arranged in several rows along the slope surface, and each row of greening protection assembly includes several groups of anchoring mechanisms, which are installed along the cracks on the surface of the rock slope, and a vegetation climbing net is laid on the anchoring mechanisms in the same row.

[0019] The present invention can be quickly fixed on the slope, the construction steps are simple, and manpower and material resources are saved. The present invention can strengthen and stabilize cracks and delay the development of rock cracks. At the same time, the slope protection structure is used to plant climbing vegetation, thereby reducing the adverse effects of sunlight exposure and rain erosion on slope stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the greening protection slope at the tunnel entrance proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure of the anchor assembly, the base plate and the intermediate support rod proposed in the present invention;

[0022] Figure 3 This is a schematic diagram of the top view of the structure of the greening protection assembly proposed by the present invention when it is installed on a slope;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the anchoring mechanism proposed in the present invention;

[0024] Figure 5 A schematic diagram of the three-dimensional structure of the tensioning member proposed by the present invention;

[0025] Figure 6 For the present invention Figure 2 A magnified image of point A;

[0026] Figure 7 For the present invention Figure 2 The enlarged view of point B;

[0027] Figure 8 For the present invention Figure 5 Enlarged view of point C;

[0028] Fig. 9 A top view of the anchoring mechanism of the present invention when installed in a hole drilled at a crack;

[0029] Fig.10 This is a cross-sectional view of the connection structure of the steel rope and the quick connector proposed by the present invention.

[0030] Description of main symbols:

[0031] In the figure: 1. Slope; 2. Protection net; 3. Greening protection component; 4. Interceptor component; 5. Tunnel; 7. Base plate; 8. Middle support rod; 9. Movable block; 10. Tensioner; 11. Locking member; 12. Drilling; 13. Anchor mechanism; 14. Measuring tube; 15. Movable rod; 16. Contact head; 17. Perforation; 18. Crack; 19. Anchor rod; 20. Inner tube; 21. Slurry outlet; 22. Top cover; 23. Center hole; 24. Connecting pipe; 25. Installation box; 28. Quick connector; 29. ​​Locking bolt; 3 0. Outer tube; 31. Positioning socket; 32. Clamp; 33. Sleeve 1; 34. Knob; 35. Threaded connection; 36. Threaded hole; 37. Water guide trough; 38. Vegetation climbing net; 40. Steel cable; 41. Clamp; 42. Annular sleeve; 43. Movable sleeve; 44. Push rod 1; 45. Positioning rod; 46. Middle connection; 47. Cavity; 48. Push rod 2; 49. Return spring; 50. Sleeve 2; 52. Limiting ring; 54. Step hole; 55. Distance sensor; 56. Test box; 57. Connecting column. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] Example 1

[0034] Reference Figure 1-Figure 10 This scheme proposes a greening protection slope protection for the rock slope at the tunnel entrance, including an interception component 4 arranged at the bottom of the slope 1 and above the entrance of the tunnel 5, a protection net 2 arranged at the top of the slope 1, and a greening protection component 3 arranged between the protection net 2 and the interception component 4.

[0035] For details, please refer to Figure 1 The interception component 4 in this solution is set on the slope just above the hole, and a horizontal working surface is constructed at this position. The interception component 4 is a stainless steel railing, and its bottom is fixed by anchor bolts or buried in the slope to prevent rolling stones from falling. In order to further prevent the falling of small-diameter gravel, at least one layer of protection net can be laid along the height direction of the railing, which can further improve the effect of protecting gravel. At the same time, a layer of soil prepared for planting can be laid on the working surface to facilitate the planting of some climbing plants, so that they can climb and grow along the interception component 4.

[0036] Please refer again Figure 1 , wherein: the greening protection components 3 are arranged in several rows along the slope surface, each row of the greening protection components 3 includes several groups of anchoring mechanisms 13, the anchoring mechanisms 13 are installed along the cracks 18 on the rock slope surface, and the anchoring mechanisms 13 in the same row are laid with vegetation climbing nets 38;

[0037] In this solution, a stainless steel water channel 37 is provided on the upper slope of each row of greening protection components 3, which can effectively drain water and prevent water from excessively eroding the slope and affecting the stability of the slope. In addition, a water pipe (not shown) can be connected to the water channel 37 to distribute water to the vegetation on the slope in a direction.

[0038] Reference Figure 2 The anchoring mechanism 13 includes a base plate 7, an intermediate support rod 8 rotatably mounted in the middle of the base plate 7, two groups of anchoring units mounted at both ends of the base plate 7, and two groups of tensioning members 10 respectively connecting the anchoring units and the intermediate support rod 8.

[0039] As an optional embodiment of the present invention, the anchoring mechanism 13 includes a hollow anchor rod 19 and an inner tube 20 arranged in the anchor rod 19, wherein the anchor rod 19 is installed in a borehole 12 excavated at the crack 18, wherein an annular grouting chamber is formed between the inner tube 20 and the inner wall of the anchor rod 19, and a plurality of grouting outlets 21 connected to the grouting chamber are opened on the outer wall of the anchor rod 19, and a removable top cover 22 is installed at the top end of the anchor rod 19, and a center hole 23 connected to the inner tube 20 is opened on the top cover 22, and a connecting pipe 24 is also installed on the top cover 22. This scheme performs distributed drilling along the extension direction of the crack 18, thereby forming a plurality of boreholes 12, so as to facilitate the installation of the anchoring mechanism 13 and facilitate the grouting inside the crack 18. It is used to inject concrete into the crack 18 through the connecting pipe 24 in the anchoring mechanism 13, so as to strengthen the slope protection and fix the anchoring mechanism 13 in the slope of the slope protection. In the present invention, a locking member 11 is also installed on the base plate 7 to lock the position of the anchor rod 19. The locking member 11 is an annular structure, which is fixed to the base plate 7 by bolts, and a through hole is formed on its side wall. A fixing bolt is passed through the through hole, so that the end of the fixing bolt is fixed to the outer wall of the anchor rod 19, thereby further fixing the relative position of the anchor rod 19 and the base plate 7.

[0040] Furthermore, we can refer to Figure 7 The bottom end of the anchor rod 19 is also fixed with a measuring cylinder 14, which is used to extend into the crack 18. The shell of the measuring cylinder 14 is symmetrically provided with perforations 17, and a contact head 16 is slidably installed at the perforation 17. The outer end of the contact head 16 contacts the inner wall of the crack 18, and the inner end of the contact head 16 is fixed with a movable rod 15. The top of the inner cylinder 20 is provided with a mounting box 25, and a displacement measurement module is provided in the mounting box 25 to measure the displacement of the movable rod 15 connected to the contact head 16. It is used to monitor whether the crack 18 develops and expands in real time, thereby playing a certain early warning role. The external controller can be set on the slope, and it is connected to the displacement measurement module by wireless communication.

[0041] It should be noted that, in this solution, the displacement measurement module includes a test box 56 disposed in the installation box 25, two distance sensors 55 corresponding to the movable rod 15 are installed in the test box 56, a stepped hole 54 is provided in the installation box 25, the movable rod 15 is movably disposed in the stepped hole 54, and the top of the movable rod 15 extends into the test box 56 and is respectively disposed adjacent to the two distance sensors 55, and the top of the installation box 25 is also detachably connected with a connecting column 57. The above-mentioned displacement measurement module is easy to install and use, and the set sensor can be connected to the external controller signal through a wireless signal, thereby realizing real-time signal transmission and monitoring whether there is a risk in the slope.

[0042] As an optional implementation of the present invention, please refer to Figure 5 , Figure 8The tensioning member 10 includes a steel cable 40, one end of which is connected to a movable block 9, which is used to slide and connect with the intermediate support rod 8 along its length direction. The intermediate support rod 8 is a cylindrical rod, and a "T"-shaped mounting groove is provided on both opposite sides of the intermediate support rod 8. The movable block 9 has a "T"-shaped slider, so that the two are connected, and a positioning hole can be provided on the movable block 9, and a positioning bolt is installed at the positioning hole. The other end of the positioning bolt is used to contact with the intermediate support rod 8, so as to fix the position of the movable block 9. The other end of the steel cable 40 is connected to a quick connector 28, which is used to be fixed to the connecting column 57. The intermediate support rod 8 can be fixed by the tensioning member 10, so that the erected intermediate support rod 8 can play a certain protective role when geological disasters such as rockfall occur on the slope.

[0043] In this solution, the quick connector 28 includes a sleeve 1 33, a sleeve 2 50, a threaded connection part 35 and a stop ring 52. The sleeve 1 33 and the sleeve 2 50 are coaxially arranged. The outer diameter of the sleeve 1 33 is larger than the outer diameter of the sleeve 2 50. The stop ring 52 is screwed and fixed on one end of the sleeve 2 50. One end of the threaded connection part 35 is rotatably sleeved on the sleeve 2 50 inside the stop ring 52. The other end of the threaded connection part 35 is used to connect with the screw hole on the connecting column 57. A plurality of threaded holes 36 are distributed on the sleeve 1 33. Positioning bolts are installed at the threaded holes 36 to fix the steel cable 40 inserted into the sleeve 1 33. The steel cable 40 can be locked by the quick connector 28 to facilitate its connection with the external structure. In this solution, a knob part 34 with a larger diameter is also arranged on the outer side of the threaded connection part 35 to facilitate the rotation of the threaded connection part 35, making the operation more convenient and labor-saving.

[0044] Furthermore, a plurality of slots (not marked) are distributed on one side of the sleeve 33, and a card plate 41 is movably provided at each slot, and the inner side of the card plate 41 is provided with card teeth for engaging the steel cable 40. A through hole corresponding to the slot is also provided in the sleeve 33, and a positioning rod 45 is movably provided at the through hole, and an annular sleeve 42 is fixed to the outer end of the positioning rod 45. A movable sleeve 43 is also movably connected to the outer side of the sleeve 33 along its axial direction, and one end of the movable sleeve 43 is used to squeeze the annular sleeve 42 to drive the positioning rod 45 to squeeze the card plate 41 to move along the radial direction of the sleeve 33, and a resistance mechanism is also installed on the threaded connection part 35 to push the movable sleeve 43 to move. The steel cable 40 can be further fixed, and the resistance mechanism is used to push the positioning rod 45 to squeeze the card plate 41 to engage with the surface of the steel cable 40.

[0045] Specific reference Fig.10The resistance mechanism includes a push rod 1 44 and a push rod 2 48. A cavity 47 is provided in the threaded connection portion 35. An intermediate connection portion 46 is movably provided in the cavity 47. One end of the push rod 1 44 and the push rod 2 48 are respectively connected to the intermediate connection portion 46, and the other ends of the push rod 1 44 and the push rod 2 48 are respectively in resistance against the movable sleeve 43 and the limiting ring 52. A return spring 49 capable of resisting against the limiting ring 52 is also mounted on the push rod 2 48.

[0046] Example 2

[0047] In this scheme, refer to Figure 5 The outer side of the steel cable 40 is sleeved with an outer cylinder 30, and the outer side of the outer cylinder 30 is also detachably connected with a clamping plate 32, and the vegetation climbing net 38 can pass through the gap between the clamping plate 32 and the outer cylinder 30. It is convenient to use each steel cable 40 to support the vegetation climbing net 38, and the function of the clamping plate 32 is to quickly fix the vegetation climbing net 38. The surface of the outer cylinder 30 is distributed with a plurality of positioning holes 31 along its length direction, and a pin rod corresponding to the positioning hole 31 is provided on one side of the clamping plate 32, and the pin rod is used to pass through the mesh on the vegetation climbing net 38, and the clamping plate 32 is connected to the outer cylinder 30 through a locking bolt 29.

[0048] The vegetation climbing net 38 in this solution is made of corrosion-resistant and fire-resistant products, which can avoid direct sunlight and rain erosion of the surface of the rock slope, thereby keeping the surface soil moist while preventing the surface soil from being washed away by rain.

[0049] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A tunnel entrance rock slope greening protection slope protection, characterized in that: include An interception assembly located at the bottom of the slope and above the tunnel entrance; A protective net installed at the top of the slope; A greening protection component provided between the protection net and the interception component; Wherein: the greening protection components are arranged in several rows along the slope surface, and each row of the greening protection components includes several groups of anchoring mechanisms, the anchoring mechanisms are installed along the cracks on the slope surface, and the anchoring mechanisms in the same row are installed with vegetation climbing nets; The anchoring mechanism comprises a base plate, an intermediate support rod rotatably mounted in the middle of the base plate, two groups of anchoring units mounted at both ends of the base plate, and two groups of tensioning members respectively connecting the anchoring units and the intermediate support rod; The anchoring mechanism comprises a hollow anchor rod and an inner tube arranged in the anchor rod, wherein the anchor rod is installed in a drill hole excavated at a crack, an annular grouting chamber is formed between the inner tube and the inner wall of the anchor rod, and a plurality of grouting outlets connected to the grouting chamber are provided on the outer wall of the anchor rod, a top cover is detachably installed on the top end of the anchor rod, a center hole connected to the inner tube is provided on the top cover, and a connecting pipe is also installed on the top cover; A measuring cylinder is also fixed to the bottom end of the anchor rod, and the measuring cylinder is used to extend into the crack. The shell of the measuring cylinder is symmetrically provided with perforations, and a contact head is slidably installed at the perforation. The outer end of the contact head contacts the inner wall of the crack, and a movable rod is fixed to the inner end of the contact head. A mounting box is provided on the top of the inner cylinder, and a displacement measurement module is provided in the mounting box to measure the displacement of the movable rod connected to the contact head. The displacement measurement module includes a test box arranged in the installation box, two distance sensors corresponding to the movable rod are installed in the test box, a stepped hole is provided in the installation box, the movable rod is movably arranged in the stepped hole, and the top end of the movable rod extends into the test box and is respectively arranged adjacent to the two distance sensors, and the top of the installation box is detachably connected with a connecting column; The tensioning member comprises a steel cable, one end of which is connected to a movable block, the movable block is slidably connected to the middle support rod, and the other end of the steel cable is connected to a quick connector, which is used to be fixed to the connecting column.

2. The tunnel entrance rock slope greening protection slope protection as claimed in claim 1, characterized in that: The quick connector includes a sleeve one, a sleeve two, a threaded connection part and a limiting ring. The sleeve one and the sleeve two are coaxially arranged, the outer diameter of the sleeve one is larger than the outer diameter of the sleeve two, the limiting ring is spirally connected to one end of the sleeve two, one end of the threaded connection part is rotatably sleeved on the sleeve two on the inner side of the limiting ring, and the other end of the threaded connection part is used for fixed connection with the connecting column. A plurality of threaded holes are distributed on the sleeve one, and positioning bolts are installed at the threaded holes to fix the steel cable inserted into the sleeve one.

3. The tunnel entrance rock slope greening protection slope protection as claimed in claim 2, characterized in that: A plurality of slots are circumferentially distributed on one side port of the sleeve one, a clamping plate is movably provided at each of the slots, and clamping teeth for engaging the steel cable are distributed on the inner side of the clamping plate. A through hole corresponding to the slot is also provided in the sleeve one, a positioning rod is movably provided at the through hole, an annular sleeve is fixed to the outer end of the positioning rod, and a movable sleeve is movably connected to the outer side of the sleeve one along its axial direction, one end of the movable sleeve is used for extruding the annular sleeve to drive the positioning rod to squeeze the clamping plate and move radially along the sleeve one, and an interference mechanism is also installed on the threaded connection part to promote the movement of the movable sleeve.

4. The tunnel entrance rock slope greening protection slope protection as claimed in claim 3, characterized in that: The resistance mechanism includes push rod 1 and push rod 2, a cavity is provided in the threaded connection part, an intermediate connection part is movably provided in the cavity, one end of push rod 1 and push rod 2 are respectively connected to the intermediate connection part, and the other ends of push rod 1 and push rod 2 are respectively in resistance with the movable sleeve and the limit ring.

5. The tunnel entrance rock slope greening protection slope protection as claimed in claim 4, characterized in that: An outer sleeve is provided on the outer side of the steel cable, and a clamping plate is detachably connected to the outer side of the outer sleeve, and the vegetation climbing net can pass through the gap between the clamping plate and the outer sleeve.

6. The tunnel entrance rock slope greening protection slope protection as claimed in claim 5, characterized in that: A plurality of positioning holes are distributed on the surface of the outer cylinder along its length direction. A positioning rod corresponding to the positioning hole is arranged on one side of the clamping plate. The positioning rod is used to pass through the mesh holes on the vegetation climbing net. The clamping plate is connected to the outer cylinder through a locking bolt.

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