Self-adaptive soil creep mechanical self-locking type soil nail-flexible surface layer quick connection joint and construction method

Abstract

The invention relates to the technical field of flexible surface layer quick connection joints, in particular to a self-adaptive soil body creep mechanical self-locking type soil nail-flexible surface layer quick connection joint and a construction method. In order to solve the problems that in a traditional soil nail support, connection between a flexible surface layer and a soil nail is prone to loosening, the force transmission efficiency is low, and construction is tedious, a self-adaptive creep deformation structure composed of a spring and an anchoring disc with barbs and a mechanical self-locking structure composed of an elastic clamping piece and a threaded anchor rod are designed. When the soil pressure changes, the spring can be automatically adjusted, and the surface layer is always kept tensioned and effectively transfers force with the soil nails; the mechanical self-locking assembly achieves one-way locking, installation is fast, and tools are not needed. The stability, safety and construction efficiency of a supporting system are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of flexible surface layer rapid connection node technology, and in particular to an adaptive soil creep mechanical self-locking soil nail-flexible surface layer rapid connection node and construction method. Background Technology

[0002] Soil nailing is an important form of support widely used in civil engineering. With the development of green and prefabricated support structures, the use of green prefabricated flexible surface soil nailing is becoming increasingly frequent.

[0003] However, achieving a reliable connection between the flexible surface layer and the soil nails in this support system, and ensuring they remain tightly fitted and do not experience stress relaxation under varying earth pressure conditions, has become a major challenge in engineering practice. While traditional connection methods represent an improvement over shotcrete mesh installation, they still have the following shortcomings: Connection nodes are difficult to adapt to the creep deformation of the soil and are prone to reduced force transmission efficiency due to stress relaxation. The construction process still relies on specialized tools, which are cumbersome to operate and take a long time. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a creep structure with adaptive soil pressure variation capability in soil nail support structure, and to realize a rapid and convenient construction method for adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node.

[0005] On one hand, this application proposes an adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node, including an anchor rod installed on a slope, on which a flexible surface layer is laid, and one end of the anchor rod is provided with a threaded wire, and further includes: An anchoring mechanism installed on the anchor rod and unidirectionally slidingly connected to the threaded wire, the anchoring mechanism includes an installation box, in which multiple elastic clips that engage with the threaded wire and are inclined are installed; An anchor plate is slidably mounted on the mounting box. A spring is fixedly installed between the anchor plate and the mounting box. Barbs are fixedly installed at the four corners of the anchor plate. The barbs penetrate and hook the flexible surface layer.

[0006] Optionally, multiple sets of guide rods are fixedly installed inside the mounting box, and a connecting plate is fixedly installed on each set of guide rods. The elastic card is fixedly connected to the connecting plate.

[0007] Optionally, a locking control assembly is installed inside the mounting box, which drives the elastic card into or out of the threaded wire.

[0008] Optionally, the locking control assembly includes multiple sliding rods fixedly installed inside the mounting box, lifting rings slidably mounted on the multiple sliding rods, a triangular plate fixedly mounted on the connecting plate, multiple driving blocks corresponding one-to-one with the triangular plate fixedly mounted on the lifting ring, the driving blocks slidably connected to the inclined surface of the triangular plate, and a threaded rod rotatably mounted inside the mounting box, the threaded rod being threadedly connected to the lifting ring.

[0009] Optionally, the anchor rod is provided with multiple sliding grooves, a slider is slidably installed in the sliding groove, a pressure plate is rotatably installed on the slider, the pressure plate is provided with connecting holes, and the anchoring disc is provided with a connector that connects to the pressure plate.

[0010] Optionally, the pressure plate has an inclined surface on the side near the slide groove, and a turning cavity is formed between the inclined surface and the slide groove.

[0011] Optionally, the connector includes a bolt mounted on the anchor plate, and the connecting hole has a threaded hole for threaded connection with the bolt.

[0012] Optionally, the connector includes a connecting pin mounted on the anchor plate, the connecting pin including an elastic plate and a connecting pin with a barbed structure fixedly mounted on the elastic plate, and an elastic rubber ring installed in the connecting hole.

[0013] Optionally, a corrugated pipe is fixedly installed between the mounting box and the anchor plate, and the spring is located inside the corrugated pipe.

[0014] On the other hand, this application proposes an adaptive soil creep mechanical self-locking soil nail construction method, applied to the above-mentioned adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node, the method including the following steps: Step 1: Lay a flexible surface layer on the slope surface in advance. Then, drive the anchor rod into the soil at the designed location, so that the threaded end of the anchor rod passes through the flexible surface layer and is exposed to the outside. Step 2: Insert the spring and anchor plate onto the exposed anchor rod in sequence, and press down on the installation box to pre-compress the spring. During this process, the positioning plate on the anchor plate can be flipped out. After the installation box contacts the positioning plate, continue to press down, which will drive the anchor plate and its barbs to move down synchronously, ensuring that the spring preload is uniform. Step 3: Continue to press down on the anchor plate so that the barbs at its four corners pierce and firmly hook onto the flexible surface layer below, completing the initial connection between the creep component and the surface layer; Step 4: Place the anchoring mechanism on the tail end of the anchor rod and push it forward. Multiple inclined elastic clips inside will engage with the threads on the anchor rod, forming a unidirectional irreversible movement until the entire node is locked.

[0015] In summary, this application includes at least one of the following beneficial technical effects: This application combines springs, anchoring discs, and barbed hooks to form a creep structure that adapts to soil creep, which can firmly connect the surface layer and the soil nail, effectively transferring the surface soil pressure to the soil nail. At the same time, the structure can also resist many external impacts, reduce the impact force transmission of external load changes on the soil nail and flexible surface layer node, and reduce the damage caused by impact. The structure has flexible characteristics, which makes the overall structure more elastic, helps to dissipate energy at the nodes when external loads change, reduces stress and deformation of the node structure, and improves the impact resistance and stability of the support structure. It can eliminate the need for additional tools, greatly reduce workers' working time, and save construction time, thereby reducing the construction cost of soil nailing support projects and improving the economy and sustainability of the project. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation of a quick-connect node for a flexible surface layer; Figure 2 Schematic diagram of the structure of the quick-connect node for the flexible surface layer Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the mounting box; Figure 4 Schematic diagram of the structure of the quick-connect node for the flexible surface layer Figure 2 ; Figure 5 This is a schematic diagram of the locking control component. Figure 6 This is a schematic diagram of the chute structure; Figure 7 Schematic diagram of the connector structure Figure 1 ; Figure 8 Schematic diagram of the connector structure Figure 2 .

[0017] Reference numerals: 1. Anchor bolt; 11. Threaded rod; 12. Slide groove; 13. Slider; 2. Anchoring mechanism; 21. Mounting box; 22. Guide rod; 23. Connecting plate; 24. Elastic clip; 25. Locking control assembly; 251. Slide rod; 252. Lifting ring; 253. Drive block; 254. Threaded rod; 255. Triangular plate; 3. Anchoring disc; 31. Spring; 32. Bellows; 33. Barbed hook; 34. Positioning plate; 4. Flexible surface layer; 5. Pressure plate; 51. Inclined surface; 52. Connecting hole; 6. Flipping cavity; 7. Connecting piece; 71. Bolt; 72. Connecting nail; 721. Elastic plate; 722. Connecting pin; 723. Rubber ring. Detailed Implementation

[0018] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0020] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] like Figures 1 to 4 As shown, the present invention proposes an adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node, including an anchor rod 1 installed on a slope, a flexible surface layer 4 laid on the slope, a threaded wire 11 at one end of the anchor rod 1, and an anchoring mechanism 2 installed on the anchor rod 1 and unidirectionally slidingly connected to the threaded wire 11. The anchoring mechanism 2 includes a mounting box 21, in which multiple elastic clips 24 are installed that engage with the threaded wire 11 and are inclined. The mechanically self-locking elastic clips 24 form a unidirectional anchoring path with the threaded wire 11 at the tail end of the anchor rod 1, which can lock firmly, allowing the creep structure to fully function. At the same time, this self-locking structure is simpler to operate than the traditional connection method, requires no additional tools, can save construction time to a greater extent, and improve the economy and sustainability of the project.

[0024] Furthermore, this embodiment also includes an anchoring plate 3 slidably mounted on the mounting box 21. A spring 31 is fixedly installed between the anchoring plate 3 and the mounting box 21. Barbs 33 are fixedly installed at each of the four corners of the anchoring plate 3. The barbs 33 penetrate and hook the flexible surface layer 4. Since the anchor rod 1 is located in the soil, the soil itself has the characteristics of loose particles, high porosity, low cohesion, low natural strength, and high compressibility, especially clay and fine uniform granular sand. Under the long-term shear force of the anchor rod 1, creep deformation occurs. The greater the shear force, the more the soil... The worse the mechanical properties of the body, the greater the deformation. This creep will reduce the prestress of the anchor rod 1. The greater the creep, the greater the prestress loss, which will lead to the anchor rod loosening and the gap between the flexible surface layer 4 and the anchor plate 3. In addition, if the installation process of the anchor rod 1 is improper or affected by external loads, the spring 31 in the creep structure will play an adjustment role, preventing the gap between the flexible surface layer 4 structure and the anchor plate 3 structure, so that the anchor plate 3 and the flexible surface layer 4 structure are tightly connected and can effectively transmit the surface soil pressure.

[0025] A corrugated pipe 32 is fixedly installed between the mounting box 21 and the anchoring plate 3. The corrugated pipe 32 protects the spring 31 and prevents it from being contaminated, which would reduce its service life. The spring 31 is located inside the corrugated pipe 32. A positioning plate 34 is rotatably installed on the anchoring plate 3. When the barb hook 33 is fixedly connected to the flexible surface layer 4, the mounting box 21 needs to be pressed down to move it downward. At this time, the spring 31 will be pre-compressed. Then, the positioning plate 34 is flipped out. After the mounting box 21 contacts the positioning plate 34, it continues to move downward, which will drive the anchoring plate 3 and the barb hook 33 downward, so that the barb hook pierces the flexible surface layer 4. This ensures that the springs 31 in different positions maintain the same preload.

[0026] like Figures 3 to 5 As shown, in this embodiment, multiple sets of guide rods 22 are fixedly installed inside the mounting box 21, and connecting plates 23 are fixedly installed on each set of guide rods 22. The elastic card 24 is fixedly connected to the connecting plate 23. A locking control component 25 is installed inside the mounting box 21. The locking control component 25 drives the elastic card 24 to enter or leave the threaded wire 11. Since the elastic card 24 and the anchor rod 1 form a single-line lock, it is not conducive to quick disassembly when disassembly is required due to installation errors. The locking control component 25 can detach the elastic card 24 from the inside of the threaded wire 11. At this time, the mounting box 21 and its internal structure can move freely, and the anchoring mechanism 2 can be quickly disassembled.

[0027] Furthermore, the locking control assembly 25 includes multiple sliding rods 251 fixedly installed inside the mounting box 21. A lifting ring 252 is slidably installed on the multiple sliding rods 251. A triangular plate 255 is fixedly installed on the connecting plate 23. Multiple drive blocks 253 corresponding one-to-one with the triangular plate 255 are fixedly installed on the lifting ring 252. The drive blocks 253 are slidably connected to the inclined surface of the triangular plate 255. A threaded rod 254 is rotatably installed inside the mounting box 21. The threaded rod 254 is threadedly connected to the lifting ring 252. By rotating the threaded rod 254, the lifting ring 252 can be driven to move up and down. The up and down moving lifting ring 252 can drive the drive blocks 253 to move up and down. The drive blocks 253 can push the triangular plate 255 to move in the left and right directions, thereby driving the elastic card 24 to move horizontally, thereby controlling whether the elastic card 24 can engage with the threaded wire 11.

[0028] like Figures 6 to 8 As shown, in this embodiment, the anchor rod 1 is provided with multiple grooves 12, and a slider 13 is slidably installed in the groove 12. A pressure plate 5 is rotatably installed on the slider 13. The pressure plate 5 is provided with a connecting hole 52. The anchoring plate 3 is provided with a connector 7 connected to the pressure plate 5. The anchoring plate 3 and the pressure plate 5 can be fixedly connected through the connector 7, so that the flexible surface layer 4 can be located between the anchoring plate 3 and the pressure plate 5, which can press and fix the flexible surface layer, improving the fastening effect of the flexible surface layer. The side of the pressure plate 5 near the groove 12 is provided with an inclined surface 51, and a flipping cavity 6 is formed between the inclined surface 51 and the groove 12. When the anchor rod 1 is installed, the anchor rod 1 and the pressure plate 5 located inside the groove 12 will pass through the flexible surface layer 4. After the pressure plate 5 passes through the flexible surface layer, the soil will enter the flipping cavity 6, and the pressure of the soil will cause the pressure plate 5 to flip, making it easy to flip and remove the pressure plate located inside the groove 12, which provides convenience for subsequent connection work.

[0029] In this embodiment, the connector 7 includes a bolt 71 installed on the anchor plate 3. The connecting hole 52 is provided with a threaded hole that is threadedly connected to the bolt 71. By connecting the bolt 71 to the connecting hole 52, the anchor plate 3 and the pressure plate 5 can be fixedly connected, and the flexible surface layer 4 can be pressed and fixed.

[0030] In this embodiment, the connector 7 includes a connecting pin 72 installed on the anchor plate 3. The connecting pin 72 includes an elastic plate 721 and a connecting pin 722 with a barbed structure fixedly installed on the elastic plate 721. An elastic rubber ring 723 is installed in the connecting hole 52. The connecting pin 722 can pass through the rubber ring 723 and form a connection with the pressure plate 5. Under the action of the elastic plate 721, the bottom of the connecting pin abuts against the bottom of the pressure plate 5, making the connection stable. Compared with the bolt connection, the connection efficiency can be improved and the connection can be completed without the aid of tools.

[0031] On the other hand, this application proposes an adaptive soil creep mechanical self-locking soil nail construction method, applied to the above-mentioned adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node. The method includes the following steps: Step 1: Lay a flexible surface layer 4 on the slope surface in advance. Then, drive the anchor rod 1 into the soil at the designed position so that the tail end of the anchor rod 1 with the threaded wire 11 passes through the flexible surface layer 4 and is exposed to the outside. Step 2: Insert the spring 31 and anchor plate 3 onto the exposed anchor rod 1 in sequence, and press down on the mounting box 21 to pre-compress the spring 31. During this process, the positioning plate 34 on the anchor plate 3 can be flipped out. After the mounting box 21 contacts the positioning plate 34, continue to press down, which can drive the anchor plate 3 and its barbs 33 to move down synchronously, ensuring that the spring preload is uniform. Step 3: Continuously press down on the anchor plate 3 so that the barbs 33 at its four corners pierce and firmly hook onto the flexible surface layer 4 below, completing the initial connection between the creep component and the surface layer; Step 4: Place the anchoring mechanism 2 onto the tail end of the anchor rod 1 and push it forward. The multiple inclined elastic cards 24 inside will engage with the threaded wire 11 on the anchor rod 1, forming a unidirectional irreversible movement until the entire node is locked.

[0032] In this embodiment, when soil creep or external load changes, causing an increase in soil pressure acting on the flexible surface layer 4, the flexible surface layer 4 pushes the anchoring disc 3 outward, thereby compressing the spring 31 behind it. The spring 31 absorbs energy and provides buffering through compression, and transmits a smoother reaction force back to the flexible surface layer 4 through the anchoring disc 3 and the barbed hook 33, thus ensuring effective force transmission. Conversely, when the soil pressure decreases, the compressed spring 31 actively releases its elastic potential energy, pushing the anchoring disc 3 tightly against the flexible surface layer 4, automatically compensating for gaps that may be caused by soil shrinkage, and preventing loosening of the connection. Throughout the process, the mechanical self-locking assembly formed by the engagement of the elastic card 24 and the threaded wire 11 on the anchor rod 1 constitutes a unidirectional irreversible anchoring path, ensuring that the anchoring mechanism 2 will not loosen in the reverse direction, thereby keeping the creep component spring 31 and the anchoring disc 3 in the working position at all times. In addition, the optional pressure plate 5 and connecting piece 7 It can further compress the flexible surface layer 4 from below, forming a clamping effect with the anchor plate 3 above, together forming a fast connection system that can adapt to soil deformation, reliably transmit force, and is convenient to construct.

Claims

1. A self-locking soil nail-flexible surface layer quick connection node for adaptive soil creep, comprising an anchor (1) installed on a slope, wherein a flexible surface layer (4) is laid on the slope, and one end of the anchor (1) is provided with a threaded wire (11), characterized in that, Also includes: An anchoring mechanism (2) is installed on the anchor rod (1) and is unidirectionally slidably connected to the threaded wire (11). The anchoring mechanism (2) includes a mounting box (21). The mounting box (21) contains a plurality of elastic clips (24) that are engaged with the threaded wire (11) and are inclined. An anchor plate (3) is slidably installed on the mounting box (21). A spring (31) is fixedly installed between the anchor plate (3) and the mounting box (21). Barbs (33) are fixedly installed at the four corners of the anchor plate (3). The barbs (33) penetrate and hook the flexible surface layer (4).

2. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 1, characterized in that, Multiple sets of guide rods (22) are fixedly installed inside the mounting box (21), and a connecting plate (23) is fixedly installed on each of the multiple sets of guide rods (22). The elastic card (24) is fixedly connected to the connecting plate (23).

3. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 2, characterized in that, The mounting box (21) is equipped with a locking control component (25), which drives the elastic card (24) to enter or leave the thread (11).

4. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 3, characterized in that, The locking control assembly (25) includes multiple sliding rods (251) fixedly installed inside the mounting box (21). A lifting ring (252) is slidably installed on the multiple sliding rods (251). A triangular plate (255) is fixedly installed on the connecting plate (23). Multiple driving blocks (253) corresponding to the triangular plate (255) are fixedly installed on the lifting ring (252). The driving blocks (253) are slidably connected to the inclined surface of the triangular plate (255). A threaded rod (254) is rotatably installed inside the mounting box (21). The threaded rod (254) is threadedly connected to the lifting ring (252).

5. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 4, characterized in that, The anchor rod (1) is provided with multiple sliding grooves (12), a slider (13) is slidably installed in the sliding groove (12), a pressure plate (5) is rotatably installed on the slider (13), a connecting hole (52) is provided on the pressure plate (5), and a connector (7) connected to the pressure plate (5) is provided on the anchor plate (3).

6. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 5, characterized in that, The pressure plate (5) has an inclined surface (51) on the side near the slide groove (12), and a turning cavity (6) is formed between the inclined surface (51) and the slide groove (12).

7. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 6, characterized in that, The connector (7) includes a bolt (71) installed on the anchor plate (3), and the connecting hole (52) is provided with a threaded hole that is threadedly connected to the bolt (71).

8. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 7, characterized in that, The connector (7) includes a connecting pin (72) mounted on the anchor plate (3). The connecting pin (72) includes an elastic plate (721) and a connecting pin (722) with a barbed structure fixedly mounted on the elastic plate (721). An elastic rubber ring (723) is installed in the connecting hole (52).

9. The adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node according to claim 8, characterized in that, A corrugated pipe (32) is fixedly installed between the mounting box (21) and the anchor plate (3), and the spring (31) is located inside the corrugated pipe (32).

10. A method for constructing adaptive soil creep mechanical self-locking soil nails, applied to the adaptive soil creep mechanical self-locking soil nail-flexible surface layer quick connection node as described in claim 9, the method comprising the following steps: Step 1: Lay a flexible surface layer (4) on the slope surface in advance. Then, drive the anchor rod (1) into the soil at the designed position so that the tail end of the anchor rod (1) with the thread (11) passes through the flexible surface layer (4) and is exposed to the outside. Step 2: Insert the spring (31) and anchor plate (3) onto the exposed anchor rod (1) in sequence, and press down on the installation box (21) to pre-compress the spring (31). During this process, the positioning plate (34) on the anchor plate (3) can be flipped out. When the installation box (21) contacts the positioning plate (34), continue to press down, which can drive the anchor plate (3) and its barbs (33) to move down synchronously, ensuring that the spring preload is uniform. Step 3: Continuously press down on the anchor plate (3) so that the barbs (33) at its four corners pierce and firmly hook onto the flexible surface layer (4) below, thus completing the initial connection between the creep component and the surface layer; Step 4: Place the anchoring mechanism (2) on the tail end of the anchor rod (1) and push it forward. The multiple inclined elastic cards (24) inside will engage with the thread (11) on the anchor rod (1) to form a unidirectional irreversible movement until the entire node is locked.

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