Axial folding recoverable side slope wall connecting piece and operation method thereof

Abstract

The invention discloses an axial folding recoverable side slope wall connecting piece and an operation method thereof. The wall connecting piece comprises an anchoring folding unit, an adjusting locking unit, a scaffold tying unit and a fixed dowel bar. The anchoring folding unit comprises a hinge shaft, a folding arc fluted disc and a supporting pull rod group; the folding arc fluted disc comprises a first fluted disc and a second fluted disc; the supporting pull rod set comprises a first supporting pull rod and a second supporting pull rod, and the opening and closing angle of the folding arc fluted disc is accurately controlled by changing the included angle of the rear ends of the two supporting pull rods. The adjusting locking unit comprises a connecting end, a lead screw and a positioning connecting plate, the two sides of the positioning connecting plate are hinged to the supporting and pulling rod set, the lead screw is rotated to drive the positioning connecting plate to move axially, and the opening and closing angle of the folding arc fluted disc is adjusted to enable the folding arc fluted disc to be tightly meshed with the inner wall of the hole. The scaffold tying unit is arranged at the rear end of the lead screw, the position of the dowel bar is adjusted and fixed, and anchoring force is completely transmitted to the scaffold. The wall connecting piece is rapidly anchored by unfolding the fluted disc, and can be integrally taken out without damage after being folded, so that a slope rock body is not damaged.

Description

Technical Field

[0001] This invention belongs to the technical field of slope anchoring devices, and more specifically, relates to an axially foldable recyclable slope wall tie and its operation method. Background Technology

[0002] In the construction of slope protection in water conservancy projects, slope-supporting scaffolding is the core support platform for slope operations, and its tying and fixing effect directly determines the construction safety. Currently, traditional slope scaffolding generally uses anchor bolt tying as the mainstream fixing method. Construction requires completing processes such as drilling, inserting anchor bolts, and grouting anchoring in sequence. After grouting, it is necessary to wait for the mortar strength to reach the standard before subsequent scaffolding erection and slope protection operations can be carried out.

[0003] The industry has introduced improved solutions such as rigid anchor wall ties, wire rope inclined wall ties, and flexible wall ties to try to optimize the stability of slope scaffolding tie. However, such solutions still rely on grouting anchoring technology and have not broken away from the traditional construction mode. They generally have the following problems: (1) The above solutions are only optimized for a single component or construction link and cannot be adapted to complex geological conditions such as broken rock and soil, soft soil, and steep slopes; (2) The anchoring nodes are prone to stress concentration and uneven force distribution, and long-term use can easily lead to tie failure; (3) The anchor consumption rate is high, and the damage rate of its disassembly is high. Moreover, the secondary repair of the slope rock mass after the anchor is removed is difficult.

[0004] Therefore, there is an urgent need for a recyclable slope scaffolding component to solve the common industry problems of rapid anchoring, temporary stabilization and component recycling of slope scaffolding. Summary of the Invention

[0005] In view of the problems of poor adaptability, easy failure of anchor nodes under stress, easy damage to slope rock mass and high repair difficulty in existing slope scaffolding anchors, this invention provides an axially foldable recyclable slope wall tie and its operation method to solve these problems.

[0006] To achieve the above objectives, the present invention provides an axially foldable recyclable slope ties, comprising an anchoring folding unit located at the bottom of an anchor hole, including a hinge shaft, symmetrically hinged folding arc-shaped toothed discs at both ends of the hinge shaft, and a support rod assembly fixedly connected to the folding arc-shaped toothed discs; the folding arc-shaped toothed discs include a first toothed disc and a second toothed disc, which are connected by a spring-loaded component and automatically unfold under elastic force; the support rod assembly includes a first support rod fixedly connected to the first toothed disc and a second support rod fixedly connected to the second toothed disc; an adjustment locking unit located at the rear end of the anchoring folding unit includes a connecting end fixedly connected to the hinge shaft and a connecting... The device includes a lead screw with a rotating end and a positioning connecting plate threaded onto the lead screw. The two sides of the positioning connecting plate are hinged to the rear ends of two sets of support rods. By rotating the lead screw, the positioning connecting plate can be moved axially along the lead screw, changing the included angle between the rear ends of the first and second support rods to adjust the opening and closing angle of the folding arc tooth disc. This allows the arc tooth structure of the folding arc tooth disc to tightly engage with the inner wall of the anchor hole, achieving grout-free mechanical self-locking anchoring. The device also includes a scaffolding tie unit fixedly installed at the rear end of the lead screw. This scaffolding tie unit adjusts the position of the fixed force transmission rod to fix it to the corresponding scaffold member clamp, completing multi-point tie operations.

[0007] Furthermore, the positioning connecting plate is a plate-shaped structure with a through hole at its center and hinge seats symmetrically provided on both sides of its front end. The hinge shafts on the hinge seats are respectively hinged to the rear ends of the first support rod and the second support rod. Adjusting nuts are welded and fixed at both ends of the through hole, and the adjusting nuts are threadedly connected to the lead screw.

[0008] Furthermore, the connecting end is a T-shaped structure, and its front connecting section is a tubular structure, which is sleeved and fixed in the middle of the hinge shaft; the two sides of the front connecting section respectively limit the two sets of folded arc toothed discs to prevent the folded arc toothed discs from moving axially; the front end of the rear connecting section of the connecting end is perpendicularly connected to the middle of the front connecting section, and the rear end is provided with a rotating connecting seat, which is rotatably connected to the lead screw, so that the lead screw can rotate freely around its own axis.

[0009] Furthermore, the hinge shaft has mounting cavities at both ends along the axial direction, and the end shaft has parallel first and second adjustment slots; a spring-loaded component is installed in the mounting cavity; the first and second adjustment slots are both 7-shaped slots, which are radially offset, and their radial arc covers the entire unfolded range of the folded arc toothed disc.

[0010] Furthermore, both the first and second toothed discs are fan-shaped structures, with a rotating hole at the end of the fan handle. The diameter of the rotating hole is adapted to the outer diameter of the hinge shaft and is sleeved on the hinge shaft. Limiting grooves are provided on the fan surfaces of the first and second toothed discs that are close to each other. The size of the limiting grooves is adapted to the support arms of the spring-loaded component. The support arms at both ends of the spring-loaded component are respectively embedded in the limiting grooves on the first and second toothed discs.

[0011] Furthermore, the anchoring folding unit also includes a limiting nut, which is a capped nut that is threaded to the end of the hinge shaft to restrict the folding arc tooth disk from axial displacement along the hinge shaft.

[0012] Furthermore, the scaffolding tie unit includes a support rod and a swivel coupler; the front end of the support rod is provided with a first connecting cavity, and a second pin hole is provided through the side wall of the first connecting cavity. By fitting the first connecting cavity onto the first connecting protrusion at the rear end of the lead screw, aligning the second pin hole with the first pin hole, and inserting the first pin, the support rod and the lead screw are fixedly connected.

[0013] Furthermore, an extension sleeve is provided between the support rod and the lead screw. The extension sleeve has a second connecting cavity at its front end and a second connecting protrusion at its rear end. The side wall of the second connecting cavity has a first connecting pin hole, and the second connecting protrusion has a second connecting pin hole. The extension sleeve is fitted onto the first connecting protrusion through the second connecting cavity at its front end, and a pin passes through the first connecting pin hole and the first pin hole in sequence to achieve a fixed connection between the front end of the extension sleeve and the lead screw. The second connecting protrusion at the rear end of the extension sleeve is embedded in the first connecting cavity, and a pin passes through the second pin hole and the second connecting pin hole in sequence to achieve a fixed connection between the rear end of the extension sleeve and the front end of the support rod.

[0014] Furthermore, the swivel fastener includes two sets of hinged rings. One set of rings is a fixed end, which is sleeved on the tube body of the support rod and can slide freely along the axial direction of the support rod to adjust the installation position. It is then locked and fixed by fastening bolts. The other set of rings is a tie end, which is used to achieve rigid clamping and fixing with the fixed force transmission rod. The angle of the fixed force transmission rod can be adjusted by swivel fastener to adapt to slopes with different slope ratios and scaffolding member connections.

[0015] According to another aspect of the present invention, a method for operating an axially foldable recyclable slope ties is also provided, comprising the following steps: S1: Determine the overall length of the wall tie based on the slope ratio and anchor hole depth, and complete the assembly of each unit; S2: Rotate the lead screw of the adjusting locking unit to move the positioning connecting plate backward, and pull the folding arc tooth disc through the support rod group to fold and retract; S3: Insert the retracted anchoring fold unit into the slope anchor hole to the design depth; S4: Rotate the screw in the opposite direction, and the folded arc toothed disc will automatically unfold under the action of the spring mechanism, and the toothed arc surface will fit tightly against the inner wall of the anchor hole. S5: The fine-tuning screw tightens the support rod assembly, and the mechanical self-locking anchoring is achieved by adjusting the nut to lock the positioning connecting plate in both directions; S6: Adjust the angle of the swivel coupler of the scaffolding tie unit and fix it with the corresponding scaffolding member clamp. For heavy load conditions, add a fixed force transmission rod to achieve multi-point tie. S7: Complete the installation and connection of the remaining wall ties according to the above steps; S8: After the scaffolding work is completed, release the locking state, retract the folding arc tooth disc, remove the wall tie as a whole, clean and maintain it, and reuse it.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: 1. Compared with the cumbersome process of traditional anchor wall ties involving "drilling holes → inserting anchors → grouting → waiting for the mortar to reach the required strength", the slope wall tie of the present invention does not require grouting operations or a long strength curing period. After the anchor holes are drilled, it can be directly installed to achieve immediate anchoring and force bearing. The installation time of a single set of components is greatly shortened, and multi-point cyclical operation can be realized. This significantly optimizes the process connection of slope support, greatly reduces the overall construction period, and effectively shortens the exposure time of the slope after excavation, thereby reducing the risk of instability caused by prolonged lack of slope protection from the source.

[0017] 2. The slope ties of the present invention form a uniform mechanical engagement with the inner wall of the anchor hole through a symmetrical folded arc toothed disc 12, and a double self-locking structure formed by the trapezoidal threaded screw 22 and the adjusting nut 24. This completely avoids the problem of ties failure caused by stress concentration and uneven force distribution on one side of the traditional anchor rod. The wind load resistance, construction dynamic load and anti-slip performance are significantly improved. At the same time, through the rotatable rotating fastener 32 and the flexible extension sleeve 4, it can perfectly adapt to complex slope conditions with different slope ratios, different anchoring depths and different soil textures. Whether it is soft soil, broken soil and rock or steep slope, it can achieve rigid ties without additional bending moment, and fully ensure the overall stability of scaffolding erection and operation.

[0018] 3. The slope ties of the present invention, through the anchoring folding unit, can be completely and without damage after the operation is completed. After cleaning and maintenance, they can be reused indefinitely, which greatly reduces the unnecessary consumption of building steel. At the same time, there is no need for auxiliary materials such as grouting cement and sand, which not only reduces the cost of material procurement and use, but also avoids the environmental pollution caused by grouting operations. Furthermore, there is no need to bear the secondary repair cost of slope rock mass after the removal of traditional anchor rods, thus achieving a dual improvement in economic and environmental benefits.

[0019] 4. The slope ties of this invention have a compact and simple overall structure. The core components are all made of standard scaffolding steel pipes, national standard fasteners, threaded rods and nuts commonly used on construction sites. They can be processed and manufactured on-site using existing materials, without the need for special custom components and complex processing equipment. Installation and dismantling can be completed with just a regular wrench, and operators can quickly learn to operate them. At the same time, each component adopts a modular disassembly and assembly design, which can be flexibly combined and adjusted according to the on-site working conditions to adapt to the operational needs of different anchor hole diameters and different scaffolding erection methods, making it highly practical and universal. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an axially foldable recyclable slope wall tie in an embodiment of the present invention; Figure 2 This is a schematic diagram of the anchoring folding unit in an embodiment of the present invention; Figure 3 This is a schematic diagram of the hinge shaft in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the folding and retraction operation of the anchoring folding unit in an embodiment of the present invention. Figure 5 This is a schematic diagram of the axially foldable recyclable slope wall connector extension in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the state of the slope wall ties in the embodiment of the present invention.

[0021] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-Anchoring folding unit, including: 11-Hinge shaft, 111-First adjustment groove, 112-Second adjustment groove, 12-Folding arc toothed disc, 121-First toothed disc, 122-Second toothed disc, 13-Support rod assembly, 131-First support rod, 132-Second support rod, 14-Limiting nut; 2-Adjustable locking unit, including: 21-Connecting end, 22-Lead screw, 23-Positioning connecting plate, 24-Adjusting nut; 3-Scaffolding tie unit, including: 31-Support rod, 32-Swivel coupler; 4-Extending sleeve, including: 401-First connecting pin hole, 402-Second connecting pin hole; 5-Fixed force transmission rod; 6-Scaffolding; 7-Slope. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figure 1-5 As shown, this invention provides an axially foldable recyclable slope ties, comprising an anchoring folding unit 1, an adjusting locking unit 2, a scaffolding tie unit 3, and a fixed force transmission rod 5. The anchoring folding unit 1 includes a hinge shaft 11, symmetrically hinged folding arc-shaped toothed discs 12 at both ends of the hinge shaft 11, and a support rod assembly 13 fixedly connected to the folding arc-shaped toothed discs 12. The folding arc-shaped toothed discs 12 include a first toothed disc 121 and a second toothed disc 122, connected by a spring mechanism, and automatically unfold under elastic force. The support rod assembly 13 includes a first support rod 131 fixedly connected to the first toothed disc 121 and a second support rod 132 fixedly connected to the second toothed disc 122. By changing the included angle between the rear ends of the first support rod 131 and the second support rod 132, the opening and closing angle of the folding arc-shaped toothed discs 12 can be precisely controlled. The adjustment and locking unit 2 includes a connecting end 21 fixedly connected to the hinge shaft 11, a screw 22 rotatably connected to the connecting end 21, and a positioning connecting plate 23 sleeved on the screw 22. The positioning connecting plate 23 is hinged to two sets of support rods 13 on both sides. By rotating the screw 22, the positioning connecting plate 23 is axially displaced along the screw 22, adjusting the opening angle of the folding arc toothed disc 12, thereby tightly engaging with the inner wall of the hole. The scaffolding tie unit 3 is located at the rear end of the screw 22, adapts to the length of the anchor hole, and adjusts the position of the fixed force transmission rod 5 according to the slope angle, so that the fixed force transmission rod 5 can completely transmit the anchoring force to the scaffolding 6. The slope wall tie of the present invention, through the unfolding of the folding arc toothed disc 12, achieves rapid installation and reliable anchoring during the slope construction process. After folding, the anchoring folding unit 1 and the entire wall tie can be removed from the hole without damage. After cleaning, it can be reused repeatedly without damaging the slope rock mass.

[0024] like Figure 1-3 As shown, the anchoring folding unit 1 is used to achieve mechanical self-locking without grouting in the pre-drilled anchor holes of the slope 7, as well as axial folding shrinkage and non-destructive recycling. It includes a hinge shaft 11, a folding arc toothed disc 12, a support rod group 13 and a limiting nut 14.

[0025] The hinge shaft 11 is made of high-strength carbon steel pin, with its two ends hinged to two sets of folding arc-shaped toothed discs 12, and its middle section fixedly connected to the front end of the connecting end 21. The hinge shaft 11 ensures that the first toothed disc 121 and the second toothed disc 122 can complete synchronous radial folding and retraction and springback unfolding around the hinge shaft 11, while also ensuring the structural coaxiality and force symmetry of the two toothed discs during rotation, avoiding anchoring failure caused by uneven force on one side. Furthermore, the hinge shaft 11 has axially arranged mounting cavities at both ends, with parallel first adjustment grooves 111 and second adjustment grooves 112 on the end shaft. A springback component is installed within the mounting cavity. Both the first adjustment groove 111 and the second adjustment groove 112 are 7-shaped grooves, radially offset, and their radial arc covers the complete unfolding range of the folding arc-shaped toothed disc 12. The axial groove portions of the first adjustment groove 111 and the second adjustment groove 112 are used to guide the support arms on both sides of the springback component, thereby installing the springback component within the mounting cavity.

[0026] The folding arc toothed disc 12 is provided in two sets, which are respectively hinged to both ends of the hinge shaft 11. Each set of folding arc toothed disc 12 includes a first toothed disc 121 and a second toothed disc 122. The two toothed discs are connected by a spring-loaded component, which can automatically unfold under the action of elastic force. Furthermore, both the first toothed disc 121 and the second toothed disc 122 are fan-shaped structures, with a rotating hole at the end of the fan handle. The diameter of the rotating hole is adapted to the outer diameter of the hinge shaft 11. By being sleeved on the hinge shaft 11, the first toothed disc 121 and the second toothed disc 122 can rotate around the hinge shaft 11. Furthermore, the fan-shaped surfaces of the first toothed disc 121 and the second toothed disc 122 that are close to each other are provided with limiting grooves. The size of the limiting grooves is adapted to the support arms of the spring-loaded component. The support arms at both ends of the spring-loaded component are respectively embedded in the limiting grooves on the first toothed disc 121 and the second toothed disc 122, thereby pushing the first toothed disc 121 and the second toothed disc 122 away from each other, so that the folded arc toothed disc 12 can automatically unfold under the action of elastic force. Furthermore, the top of the fan-shaped arc surface of the first toothed disc 121 and the second toothed disc 122 is a gear-shaped structure, which can greatly increase the friction with the inner wall of the slope anchor hole, and improve the anchoring force and anti-slip performance.

[0027] The spring is a torsion spring, which has two sets, respectively located in the mounting cavities at both ends of the hinge shaft 11. The support arms at both ends are respectively embedded in the limiting grooves on the first toothed disc 121 and the second toothed disc 122, providing continuous and stable elastic force for the unfolding of the folding arc toothed disc 12, while providing an overcoming reverse buffer force for the folding and retraction.

[0028] The support rod assembly 13 is a motion control and force transmission component for the folding arc toothed disc 12, including a first support rod 131 and a second support rod 132. The front end of the first support rod 131 is fixedly connected to the middle of the first toothed disc 121, and the front end of the second support rod 132 is fixedly connected to the middle of the second toothed disc 122. By changing the angle between the rear ends of the first support rod 131 and the second support rod 132, precise control of the opening and closing angle of the folding arc toothed disc 12 can be achieved. At the same time, in the anchored locking state, the support rod assembly 13 forms a rigid support for the folding arc toothed disc 12, restricting its retraction and ensuring the continuous stability of the anchoring force.

[0029] The limiting nut 14 is a capped nut that is threaded to the end of the hinge shaft 11. It restricts the axial displacement of the folding arc toothed disc 12 along the hinge shaft 11, avoiding uneven force and hinge jamming caused by misalignment of the first toothed disc 121 and the second toothed disc 122, and ensuring the smoothness of folding and unfolding actions. At the same time, the limiting nut 14 can seal the mounting cavity at the end of the hinge shaft 11, preventing mud, sand, gravel, and water vapor in the anchor hole from entering the mounting cavity and hinge part, avoiding corrosion of the spring-loaded part and jamming of the hinge structure, and ensuring the long-term stability of the spring-loaded and folding actions.

[0030] When the anchoring folding unit 1 of the present invention is in operation, pulling the support rod assembly 13 reduces the included angle between the upper ends of the first support rod 131 and the second support rod 132, thereby driving the folding arc toothed disc 12 to rotate around the hinge axis 11, overcoming the elastic force of the spring element to complete radial folding and shrinking, so that the overall outer diameter of the unit is smaller than the pre-drilled anchor hole diameter, and can be smoothly sent into the anchor hole; after the folding arc toothed disc 12 is sent into the designed depth of the anchor hole, pushing the support rod assembly 13 downwards increases the included angle between the upper ends of the first support rod 131 and the second support rod 132, providing radial thrust, and so on. When the spring force of the rebound component is coordinated, the first toothed disc 121 and the second toothed disc 122 automatically rebound and unfold. The toothed arc surface fits tightly against the inner wall of the anchor hole, achieving mechanical self-locking anchoring without grouting. The tying force can be directly transmitted by adjusting the locking unit 2 and the scaffolding tie unit 3, without waiting for the mortar strength to reach the standard. After the scaffolding operation is completed, the pull rod group 13 drives the folding arc toothed disc 12 to fold and retract again, completely disengaging from the inner wall of the anchor hole. The entire wall tie can then be removed from the anchor hole without damage. After cleaning and maintenance, it can be reused.

[0031] With the anchoring folding unit 1, the opening and closing angle of its folding arc toothed disc 12 can be precisely adjusted, which can be adapted to slope anchor holes of different diameters and different rock and soil textures. The double toothed disc symmetrical force-bearing structure avoids the problem of stress concentration on one side, significantly improving anchoring stability and anti-slip performance. It also enables the wall tie to be removed without damage, without causing secondary damage to the slope rock mass. The components can be recycled and reused, greatly reducing material consumption and conforming to the concept of green construction.

[0032] As shown in 1-2, the adjusting locking unit 2 is used to achieve precise adjustment of the opening and closing angle of the anchoring folding unit 1, rigid locking of the anchoring state, and uniform transmission of the scaffolding tie force throughout the entire path. It includes a connecting end 21, a lead screw 22, a positioning connecting plate 23, and a limiting nut 24.

[0033] The connecting end 21 has a T-shaped structure, with its front connecting section being a tubular structure, sleeved and fixed in the middle of the hinge shaft 11, and welded to the hinge shaft 11 to form a whole. The two sides of this front connecting section respectively limit the movement of the two sets of folding arc-shaped toothed discs 12, preventing axial movement of the folding arc-shaped toothed discs 12. The front end of the rear connecting section of the connecting end 21 is perpendicularly connected to the middle of the front connecting section, and the rear end is provided with a rotating connecting seat. This rotating connecting seat is rotatably connected to the lead screw 22, allowing the lead screw 22 to rotate freely around its own axis without axial movement. By providing the connecting end 21, a coaxial rigid connection is achieved between the adjusting locking unit 2 and the anchoring folding unit 1, avoiding uneven load distribution, ensuring synchronous operation and uniform force distribution of the two toothed discs, and providing a stable rotation fulcrum for the lead screw 22, ensuring no radial wobble during lead screw transmission and guaranteeing the adjustment accuracy of the opening and closing angle.

[0034] The lead screw 22 is rotatably connected to the connecting end 21 at its front end. Its body has a trapezoidal threaded portion, which, compared to a common triangular thread, offers higher transmission efficiency, stronger self-locking performance, and better anti-slip capability, and can withstand the large axial tensile force generated by the scaffolding tie-up unit. Furthermore, the lead screw 22 has a first connecting protrusion at its rear end, with a first pin hole radially arranged on the protrusion. The first connecting protrusion and the first pin hole enable a fixed connection between the rear end of the lead screw 22 and the scaffolding tie-up unit 3.

[0035] The positioning connecting plate 23 is a plate-shaped structure with a through hole in the center and symmetrical hinge seats on both sides of the front end. The hinge shafts on the hinge seats are respectively hinged to the rear ends of the first support rod 131 and the second support rod 132. The hinge points on both sides are completely symmetrical to ensure that the two support rods are subjected to force and move synchronously. Preferably, the positioning connecting plate 23 is provided with reinforcing ribs on both sides to improve its resistance to bending and deformation.

[0036] Furthermore, adjusting nuts 24 are welded and fixed at both ends of the through hole of the positioning connecting plate 23. The adjusting nuts 24 are threadedly connected to the lead screw 22. By engaging the trapezoidal thread of the adjusting nuts 24 with the lead screw 22, the rotational motion of the lead screw 22 is converted into linear motion, which drives the axial displacement of the positioning connecting plate 23 to achieve the transmission function. In the anchored state, the two sets of adjusting nuts 24 lock their positions synchronously with the positioning connecting plate 23. With the self-locking performance of the trapezoidal thread, a bidirectional rigid limit is formed, which completely locks the axial position of the positioning connecting plate 23, preventing the anchoring failure caused by the displacement of the positioning plate 23 along the lead screw 22, and ensuring the anchoring stability of the wall tie under dynamic load and wind load. At the same time, by slightly rotating the lead screw 22, the position of the positioning connecting plate 23 is finely adjusted at the micron level, thereby accurately adjusting the biting preload of the folding arc tooth disc 12 to adapt to slope conditions of different hardness such as soft soil, broken soil, and hard rock.

[0037] When adjusting and locking unit 2 is used for adjustment and locking, rotating screw 22 causes the positioning connecting plate 23 to move axially towards the anchor hole, releasing the tension of the support rod assembly 13. The folded arc toothed disc 12 automatically rebounds and unfolds under the elastic force of the spring-loaded component, and the toothed arc surface initially fits against the inner wall of the anchor hole. Continue to finely adjust screw 22 so that the positioning connecting plate 23 pushes the support rod assembly 13 forward, pushing the folded arc toothed disc 12 to form a strong engagement with the inner wall of the anchor hole. At this time, the self-locking performance of the trapezoidal thread forms a first-level anti-loosening protection. After confirming that the engagement state meets the standard, stop rotating screw 22. The meshing structure of adjusting nut 24 and screw 22 forms a two-way rigid lock, completely locking the axial position of positioning connecting plate 23 and forming a second-level anti-loosening protection. At this time, the wall tie is anchored and can be reliably connected to scaffolding 6 directly through scaffolding tie unit 3, directly bearing the tie load without grouting or waiting for mortar strength.

[0038] The scaffolding tie unit 3 is used to transmit the anchoring force to the scaffolding 6. It includes a support rod 31 and a swivel coupler 32. The front end of the support rod 31 is provided with a first connecting cavity. A second pin hole is provided through the side wall of the first connecting cavity. By fitting the first connecting cavity onto the first connecting protrusion at the rear end of the lead screw 22 and aligning the second pin hole with the first pin hole, the first pin is inserted, thereby achieving a fixed connection between the support rod 31 and the lead screw 22. Furthermore, the first connecting protrusion is a prism structure, which can quickly complete the docking with the first connecting cavity and the alignment and positioning of the second pin hole with the first pin hole.

[0039] The rotating fastener 32 includes two sets of hinged rings. The two sets of rings can rotate freely around the hinge axis at all angles, which can adapt to slopes of any ratio and scaffold member connection requirements of any angle. One set of rings is a fixed end, which can be sleeved on the tube of the support rod 31 and freely slide along the axial direction of the support rod 31 to adjust the installation position, and is locked and fixed by fastening bolts. The other set of rings is a tie end, which is used to achieve rigid clamping fixation with the fixed force transmission rod 5. The angle of the fixed force transmission rod 5 can be adjusted by rotating the fastener 32 to adapt to slopes of different ratios and scaffold member connections. This completely solves the problem of incompatible tie angles and additional bending moments at the connection points caused by slope undulations and slope ratio changes in traditional rigid wall ties. It avoids tie failure and scaffold instability caused by stress concentration from the root.

[0040] Furthermore, to avoid the support rod 31 being too short, preventing the anchoring folding unit 1 from being delivered to the bottom of the anchor hole, an extension sleeve 4 is provided between the support rod 31 and the lead screw 22. The extension sleeve 4 has a second connecting cavity at its front end and a second connecting protrusion at its rear end. The side wall of the second connecting cavity has a first connecting pin hole 401, and the second connecting protrusion has a second connecting pin hole 402. The extension sleeve 4 is fitted onto the first connecting protrusion through the second connecting cavity at its front end, and a pin is passed through the first connecting pin hole 401 and the first pin hole in sequence to achieve a fixed connection between the front end of the extension sleeve 4 and the lead screw 22. The second connecting protrusion at the rear end of the extension sleeve 4 is embedded in the first connecting cavity, and a pin is passed through the second pin hole and the second connecting pin hole 402 in sequence to achieve a fixed connection between the rear end of the extension sleeve 4 and the front end of the support rod 31.

[0041] The fixed force transmission rod 5 is rigidly connected to the support rod 31 of the scaffolding tie unit 3 via the swivel coupler 32. This allows the concentrated anchoring force of the wall tie to be evenly distributed to multiple uprights or horizontal members of the scaffolding 6, achieving a single-point input and multi-point output force transmission mode, thus avoiding stress concentration at anchoring nodes. During the tying operation, the installation angle and spatial position of the fixed force transmission rod 5, as well as the placement of the swivel couplers, are finely adjusted to ensure that the pre-installed swivel couplers on the fixed force transmission rod 5 are precisely aligned with two or more uprights / horizontal members of the scaffolding 6. A wrench is then used to tighten the fastening bolts and locking nuts of all swivel couplers sequentially, forming rigid clamps between the fixed force transmission rod 5, the support rod 31, and the scaffolding members, thus completing the multi-point tying operation. For special working conditions such as ultra-high slopes and heavy load operations, multiple sets of fixed force transmission rods 5 can be vertically arranged along the scaffolding. Each set of fixed force transmission rods 5 corresponds to a set of wall tie main bodies and is synchronously connected with the multi-layer members of the scaffolding to form a three-dimensional multi-layer tie system, further improving the overall stability of the scaffolding. After the tie is completed, the anchoring force can be completely and evenly transmitted to the entire scaffolding system through the wall tie main bodies and fixed force transmission rods 5, forming a stable force closed loop.

[0042] When the slope ties of the present invention are in operation, the assembly of each unit component is completed in advance. Rotating the screw 22 of the adjusting locking unit 2 drives the positioning connecting plate 23 to move axially along the screw 22 toward the scaffold. The support rod group 13, which is hinged to the positioning connecting plate 23, pulls the folding arc toothed disc 12, which is hinged to the hinge shaft 11, to overcome the elastic force of the spring and complete the radial folding and shrinking. After the outer diameter of the anchoring folding unit 1 is smaller than the pre-drilled anchor hole diameter, it is sent into the anchor hole design depth. Rotating the screw 22 in the opposite direction drives the positioning connecting plate 23 to move toward the anchor hole, releasing the tension of the support rod group 13. The folding arc toothed disc 12 automatically rebounds and unfolds under the action of the spring force of the spring. Its top gear-shaped arc surface fits tightly with the inner wall of the anchor hole. The screw 22 is further finely adjusted so that the positioning connecting plate 23 pushes the support rod group 13 forward to form a rigid support. The meshing structure between the adjusting nut 24 and the screw 22 forms a bidirectional rigid locking. After completing the mechanical self-locking anchoring of the wall tie in the anchor hole of slope 7 without grouting, the anchoring angle between the support rod 31 and the scaffold 6 is adjusted by the swivel coupler 32 of the scaffolding tie unit 3. The swivel coupler 32 is then fixed to the upright or horizontal bar of the scaffold 6. Under heavy load conditions, the fixed force transmission rod 5 is installed simultaneously. The fixed force transmission rod 5 is rigidly connected to the support rod 31 and multiple rods of the scaffold 6 by the swivel coupler 32, realizing the multi-point distributed transmission of concentrated anchoring force. After completing the anchoring operation of a single set of wall ties, the installation of all wall ties is completed in this cycle. After all the work on the scaffold 6 is completed, the anchoring connection between the swivel coupler 32 and the scaffold 6 is first released. Then, the screw rod 22 is rotated to drive the positioning connecting plate 23 to move backward. The folding arc tooth plate 12 is pulled by the bracing rod group 13 to fold and retract again and disengage from the inner wall of the anchor hole. The entire wall tie can then be removed from the anchor hole without damage. After cleaning and maintenance, it can be reused.

[0043] Compared to the cumbersome process of traditional anchor wall ties involving "drilling → inserting anchors → grouting → waiting for mortar strength to reach the standard," the slope wall tie of this invention eliminates the need for grouting and lengthy strength curing. After drilling the anchor holes, it can be directly installed to achieve immediate anchoring and force application. The installation time for a single component is significantly reduced, enabling multi-point cyclical operation. This significantly optimizes the process of slope support, greatly shortens the overall construction period, and effectively reduces the exposure time of the slope after excavation, thereby reducing the risk of instability caused by prolonged lack of slope protection.

[0044] The slope ties of this invention form a uniform mechanical engagement with the inner wall of the anchor hole through a symmetrical folded arc toothed disc 12. Combined with the double self-locking structure formed by the trapezoidal threaded screw 22 and the adjusting nut 24, it completely avoids the problem of ties failure caused by stress concentration and uneven force distribution on one side of the traditional anchor rod. The wind load resistance, construction dynamic load and anti-slip performance are significantly improved. At the same time, through the rotatable rotating fastener 32 and the flexible extension sleeve 4, it can perfectly adapt to complex slope conditions with different slope ratios, different anchoring depths and different soil textures. Whether it is soft soil, broken soil and rock or steep slope, it can achieve rigid ties without additional bending moment, and fully ensure the overall stability of scaffolding erection and operation.

[0045] The slope ties of this invention, through the anchoring folding unit 1, can be completely and without damage removed after the operation is completed. After cleaning and maintenance, they can be reused indefinitely, greatly reducing the unnecessary consumption of building steel. At the same time, there is no need for auxiliary materials such as grouting cement and sand, which not only reduces the cost of material procurement and use, but also avoids the environmental pollution caused by grouting operations. Furthermore, there is no need to bear the secondary repair costs of slope rock mass after the removal of traditional anchor rods, thus achieving a dual improvement in economic and environmental benefits.

[0046] The slope ties of this invention have a compact and simple overall structure. The core components are all made of standard scaffolding steel pipes, national standard fasteners, threaded rods and nuts commonly used on construction sites. They can be fabricated on-site using existing materials, without the need for special custom components or complex processing equipment. Installation and dismantling can be completed with just a regular wrench, and workers can quickly learn to operate them. At the same time, each component adopts a modular disassembly and assembly design, which can be flexibly combined and adjusted according to the site conditions to adapt to the operational needs of different anchor hole diameters and different scaffolding erection methods, making it highly practical and universal.

[0047] The present invention also provides a method for operating an axially foldable recyclable slope ties, comprising the following steps: S1: Determine the overall length of the wall tie based on the slope ratio 7 and the anchor hole depth, and complete the assembly of each unit; S2: Rotate the lead screw 22 of the adjusting locking unit 2 to drive the positioning connecting plate 23 to move backward, and pull the folding arc tooth disk 12 through the support rod group 13 to fold and retract; S3: Insert the retracted anchoring folding unit 1 into the anchor hole of slope 7 to the design depth; S4: Rotate the lead screw 22 in the opposite direction, and the folded arc toothed disc 12 will automatically unfold under the action of the spring-loaded component, and the toothed arc surface will fit tightly against the inner wall of the anchor hole. S5: The fine-tuning screw 22 tightens the support rod assembly 13, and the mechanical self-locking anchoring is completed by adjusting the nut 24 and locking the positioning connecting plate 23 in both directions. S6: Adjust the angle of the swivel coupler 32 of the scaffolding tie unit 3 and fix it with the corresponding member clamp of the scaffolding 6. For heavy load conditions, add a fixed force transmission rod 5 to achieve multi-point tie. S7: Complete the installation and connection of the remaining wall ties according to the above process; S8: After the scaffolding work is completed, release the locking state, retract the folding arc tooth disc 12, remove the wall tie as a whole, clean and maintain it, and reuse it.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An axially foldable and recyclable slope ties, characterized in that, include: The anchoring folding unit (1) located at the bottom of the anchor hole includes a hinge shaft (11), folding arc toothed discs (12) symmetrically hinged at both ends of the hinge shaft (11), and a support rod assembly (13) fixedly connected to the folding arc toothed discs (12); the folding arc toothed discs (12) include a first toothed disc (121) and a second toothed disc (122), which are connected by a spring-loaded component and automatically unfold under the action of elastic force; the support rod assembly (13) includes a first support rod (131) fixedly connected to the first toothed disc (121), and a second support rod (132) fixedly connected to the second toothed disc (122). The adjustment and locking unit (2) located at the rear end of the anchoring folding unit (1) includes a connecting end (21) fixedly connected to the hinge shaft (11), a screw (22) rotatably connected to the connecting end (21), and a positioning connecting plate (23) threaded onto the screw (22). The two sides of the positioning connecting plate (23) are respectively hinged to the rear ends of two sets of support rods (13). By rotating the screw (22), the positioning connecting plate (23) can be moved axially along the screw (22), changing the included angle between the rear ends of the first support rod (131) and the second support rod (132) to adjust the opening and closing angle of the folding arc tooth disk (12), so that the arc tooth structure of the folding arc tooth disk (12) is tightly engaged with the inner wall of the anchor hole, realizing mechanical self-locking anchoring without grouting. And a scaffolding tie unit (3) fixedly installed at the rear end of the screw (22). The scaffolding tie unit (3) adjusts the position of the fixed force transmission rod (5) so that the fixed force transmission rod (5) is fixed with the corresponding rod of the scaffolding (6) and completes the multi-point tie operation.

2. The axially foldable recyclable slope ties according to claim 1, characterized in that, The positioning connecting plate (23) is a plate-shaped structure with a through hole at its center. The front ends are symmetrically provided with hinge seats on both sides. The hinge shafts on the hinge seats are respectively hinged to the rear ends of the first support rod (131) and the second support rod (132). Adjusting nuts (24) are welded and fixed at both ends of the through hole. The adjusting nuts (24) are threadedly connected to the lead screw (22).

3. The axially foldable recyclable slope ties according to claim 2, characterized in that, The connecting end (21) is a T-shaped structure, and its front connecting section is a tubular structure, which is sleeved and fixed in the middle of the hinge shaft (11). The two sides of the front connecting section limit the two sets of folded arc toothed discs (12) respectively to prevent the folded arc toothed discs (12) from axial movement. The front end of the rear connecting section of the connecting end (21) is perpendicularly connected to the middle of the front connecting section, and the rear end is provided with a rotating connecting seat. The rotating connecting seat is rotatably connected to the lead screw (22) so that the lead screw (22) can rotate freely around its own axis.

4. An axially foldable recyclable slope ties according to any one of claims 1-3, characterized in that, The hinge shaft (11) has mounting cavities at both ends along the axial direction, and the end shaft has a first adjustment groove (111) and a second adjustment groove (112) parallel to each other; a spring-loaded component is installed in the mounting cavity; the first adjustment groove (111) and the second adjustment groove (112) are both 7-shaped grooves, which are radially offset, and their radial arc covers the complete unfolding range of the folded arc toothed disc (12).

5. The axially foldable recyclable slope ties according to claim 4, characterized in that, Both the first toothed disc (121) and the second toothed disc (122) are fan-shaped structures with a rotating hole at the end of the fan handle. The diameter of the rotating hole is adapted to the outer diameter of the hinge shaft (11) and is sleeved on the hinge shaft (11). The fan surfaces of the first toothed disc (121) and the second toothed disc (122) that are close to each other are provided with limiting grooves. The size of the limiting grooves is adapted to the support arms of the spring-loaded component. The support arms at both ends of the spring-loaded component are respectively embedded in the limiting grooves on the first toothed disc (121) and the second toothed disc (122).

6. The axially foldable recyclable slope ties according to claim 5, characterized in that, The anchoring folding unit (1) also includes a limiting nut (14), which is a capped nut that is threaded to the end of the hinge shaft (11) to limit the axial displacement of the folding arc tooth disk (12) along the hinge shaft (11).

7. An axially foldable recyclable slope ties according to any one of claims 1-3, characterized in that, The scaffolding tie unit (3) includes a support rod (31) and a swivel coupler (32). The front end of the support rod (31) is provided with a first connecting cavity, and a second pin hole is provided through the side wall of the first connecting cavity. By fitting the first connecting cavity onto the first connecting protrusion at the rear end of the screw rod (22) and aligning the second pin hole with the first pin hole, the first pin is inserted, thereby achieving a fixed connection between the support rod (31) and the screw rod (22).

8. The axially foldable recyclable slope ties according to claim 7, characterized in that, An extension sleeve (4) is provided between the support rod (31) and the lead screw (22). The extension sleeve (4) has a second connecting cavity at its front end and a second connecting protrusion at its rear end. The side wall of the second connecting cavity has a first connecting pin hole (401), and the second connecting protrusion has a second connecting pin hole (402). The extension sleeve (4) is fitted onto the first connecting protrusion through the second connecting cavity at its front end, and a pin is passed through the first connecting pin hole (401) and the first pin hole in sequence to achieve a fixed connection between the front end of the extension sleeve (4) and the lead screw (22). The second connecting protrusion at the rear end of the extension sleeve (4) is embedded in the first connecting cavity, and a pin is passed through the second pin hole and the second connecting pin hole (402) in sequence to achieve a fixed connection between the rear end of the extension sleeve (4) and the front end of the support rod (31).

9. An axially foldable and recyclable slope ties according to claim 7, characterized in that, The rotating fastener (32) includes two sets of hinged hoops. One set of hoops is a fixed end, which is sleeved on the tube of the support rod (31) and can slide freely along the axial direction of the support rod (31) to adjust the installation position. It is then locked and fixed by fastening bolts. The other set of hoops is a tie end, which is used to achieve rigid clamping and fixing with the fixed force transmission rod (5). The angle of the fixed force transmission rod (5) can be adjusted by rotating the fastener (32) to adapt to slopes with different slope ratios and scaffold member connections.

10. A method for operating an axially foldable and recyclable slope ties, characterized in that, Includes the following steps: S1: Determine the overall length of the wall tie according to the slope ratio (7) and the depth of the anchor hole, and complete the assembly of each unit; S2: Rotate the lead screw (22) of the adjusting locking unit (2) to drive the positioning connecting plate (23) to move backward, and pull the folding arc tooth plate (12) through the support rod group (13) to fold and retract; S3: Insert the shrunken anchor fold unit (1) into the anchor hole of the slope (7) to the design depth; S4: Rotate the screw (22) in the opposite direction, and the folded arc toothed disc (12) will automatically unfold under the action of the spring-loaded part, and the toothed arc surface will fit tightly against the inner wall of the anchor hole; S5: The fine-tuning screw (22) tightens the support rod assembly (13), and the mechanical self-locking anchor is completed by adjusting the nut (24) to lock the positioning connecting plate (23). S6: Adjust the angle of the swivel coupler (32) of the scaffolding tie unit (3) and fix it with the corresponding member of the scaffolding (6) with a clamp. For heavy load conditions, add a fixed force transmission rod (5) to achieve multi-point tie. S7: Complete the installation and connection of the remaining wall ties according to the above steps; S8: After the scaffolding work is completed, release the locking state, retract the folding arc tooth disc (12), remove the wall tie as a whole, clean and maintain it, and reuse it.

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